1 324891a5 2006-06-25 devnull #include <u.h>
2 324891a5 2006-06-25 devnull #include <libc.h>
3 324891a5 2006-06-25 devnull #include <draw.h>
4 324891a5 2006-06-25 devnull #include <memdraw.h>
6 324891a5 2006-06-25 devnull int drawdebug;
7 324891a5 2006-06-25 devnull static int tablesbuilt;
9 324891a5 2006-06-25 devnull /* perfect approximation to NTSC = .299r+.587g+.114b when 0 ≤ r,g,b < 256 */
10 324891a5 2006-06-25 devnull #define RGB2K(r,g,b) ((156763*(r)+307758*(g)+59769*(b))>>19)
13 324891a5 2006-06-25 devnull * for 0 ≤ x ≤ 255*255, (x*0x0101+0x100)>>16 is a perfect approximation.
14 324891a5 2006-06-25 devnull * for 0 ≤ x < (1<<16), x/255 = ((x+1)*0x0101)>>16 is a perfect approximation.
15 324891a5 2006-06-25 devnull * the last one is perfect for all up to 1<<16, avoids a multiply, but requires a rathole.
17 324891a5 2006-06-25 devnull /* #define DIV255(x) (((x)*257+256)>>16) */
18 324891a5 2006-06-25 devnull #define DIV255(x) ((((x)+1)*257)>>16)
19 324891a5 2006-06-25 devnull /* #define DIV255(x) (tmp=(x)+1, (tmp+(tmp>>8))>>8) */
21 324891a5 2006-06-25 devnull #define MUL(x, y, t) (t = (x)*(y)+128, (t+(t>>8))>>8)
22 324891a5 2006-06-25 devnull #define MASK13 0xFF00FF00
23 324891a5 2006-06-25 devnull #define MASK02 0x00FF00FF
24 324891a5 2006-06-25 devnull #define MUL13(a, x, t) (t = (a)*(((x)&MASK13)>>8)+128, ((t+((t>>8)&MASK02))>>8)&MASK02)
25 324891a5 2006-06-25 devnull #define MUL02(a, x, t) (t = (a)*(((x)&MASK02)>>0)+128, ((t+((t>>8)&MASK02))>>8)&MASK02)
26 324891a5 2006-06-25 devnull #define MUL0123(a, x, s, t) ((MUL13(a, x, s)<<8)|MUL02(a, x, t))
28 324891a5 2006-06-25 devnull #define MUL2(u, v, x, y) (t = (u)*(v)+(x)*(y)+256, (t+(t>>8))>>8)
30 324891a5 2006-06-25 devnull static void mktables(void);
31 324891a5 2006-06-25 devnull typedef int Subdraw(Memdrawparam*);
32 324891a5 2006-06-25 devnull static Subdraw chardraw, alphadraw, memoptdraw;
34 324891a5 2006-06-25 devnull static Memimage* memones;
35 324891a5 2006-06-25 devnull static Memimage* memzeros;
36 324891a5 2006-06-25 devnull Memimage *memwhite;
37 324891a5 2006-06-25 devnull Memimage *memblack;
38 324891a5 2006-06-25 devnull Memimage *memtransparent;
39 324891a5 2006-06-25 devnull Memimage *memopaque;
41 324891a5 2006-06-25 devnull int __ifmt(Fmt*);
44 324891a5 2006-06-25 devnull memimageinit(void)
46 324891a5 2006-06-25 devnull static int didinit = 0;
48 324891a5 2006-06-25 devnull if(didinit)
51 324891a5 2006-06-25 devnull didinit = 1;
53 324891a5 2006-06-25 devnull mktables();
54 324891a5 2006-06-25 devnull _memmkcmap();
56 324891a5 2006-06-25 devnull fmtinstall('R', Rfmt);
57 324891a5 2006-06-25 devnull fmtinstall('P', Pfmt);
58 324891a5 2006-06-25 devnull fmtinstall('b', __ifmt);
60 324891a5 2006-06-25 devnull memones = allocmemimage(Rect(0,0,1,1), GREY1);
61 324891a5 2006-06-25 devnull memones->flags |= Frepl;
62 324891a5 2006-06-25 devnull memones->clipr = Rect(-0x3FFFFFF, -0x3FFFFFF, 0x3FFFFFF, 0x3FFFFFF);
63 324891a5 2006-06-25 devnull *byteaddr(memones, ZP) = ~0;
65 324891a5 2006-06-25 devnull memzeros = allocmemimage(Rect(0,0,1,1), GREY1);
66 324891a5 2006-06-25 devnull memzeros->flags |= Frepl;
67 324891a5 2006-06-25 devnull memzeros->clipr = Rect(-0x3FFFFFF, -0x3FFFFFF, 0x3FFFFFF, 0x3FFFFFF);
68 324891a5 2006-06-25 devnull *byteaddr(memzeros, ZP) = 0;
70 324891a5 2006-06-25 devnull if(memones == nil || memzeros == nil)
71 324891a5 2006-06-25 devnull assert(0 /*cannot initialize memimage library */); /* RSC BUG */
73 324891a5 2006-06-25 devnull memwhite = memones;
74 324891a5 2006-06-25 devnull memblack = memzeros;
75 324891a5 2006-06-25 devnull memopaque = memones;
76 324891a5 2006-06-25 devnull memtransparent = memzeros;
79 324891a5 2006-06-25 devnull u32int _imgtorgba(Memimage*, u32int);
80 324891a5 2006-06-25 devnull u32int _rgbatoimg(Memimage*, u32int);
81 324891a5 2006-06-25 devnull u32int _pixelbits(Memimage*, Point);
83 324891a5 2006-06-25 devnull #define DBG if(drawdebug)
84 324891a5 2006-06-25 devnull static Memdrawparam par;
86 324891a5 2006-06-25 devnull Memdrawparam*
87 324891a5 2006-06-25 devnull _memimagedrawsetup(Memimage *dst, Rectangle r, Memimage *src, Point p0, Memimage *mask, Point p1, int op)
89 324891a5 2006-06-25 devnull if(mask == nil)
90 324891a5 2006-06-25 devnull mask = memopaque;
92 324891a5 2006-06-25 devnull DBG print("memimagedraw %p/%luX %R @ %p %p/%luX %P %p/%luX %P... ", dst, dst->chan, r, dst->data->bdata, src, src->chan, p0, mask, mask->chan, p1);
94 324891a5 2006-06-25 devnull if(drawclip(dst, &r, src, &p0, mask, &p1, &par.sr, &par.mr) == 0){
95 324891a5 2006-06-25 devnull /* if(drawdebug) */
96 324891a5 2006-06-25 devnull /* iprint("empty clipped rectangle\n"); */
97 324891a5 2006-06-25 devnull return nil;
100 324891a5 2006-06-25 devnull if(op < Clear || op > SoverD){
101 324891a5 2006-06-25 devnull /* if(drawdebug) */
102 324891a5 2006-06-25 devnull /* iprint("op out of range: %d\n", op); */
103 324891a5 2006-06-25 devnull return nil;
106 324891a5 2006-06-25 devnull par.op = op;
107 324891a5 2006-06-25 devnull par.dst = dst;
108 324891a5 2006-06-25 devnull par.r = r;
109 324891a5 2006-06-25 devnull par.src = src;
110 324891a5 2006-06-25 devnull /* par.sr set by drawclip */
111 324891a5 2006-06-25 devnull par.mask = mask;
112 324891a5 2006-06-25 devnull /* par.mr set by drawclip */
114 324891a5 2006-06-25 devnull par.state = 0;
115 324891a5 2006-06-25 devnull if(src->flags&Frepl){
116 324891a5 2006-06-25 devnull par.state |= Replsrc;
117 324891a5 2006-06-25 devnull if(Dx(src->r)==1 && Dy(src->r)==1){
118 324891a5 2006-06-25 devnull par.sval = pixelbits(src, src->r.min);
119 324891a5 2006-06-25 devnull par.state |= Simplesrc;
120 324891a5 2006-06-25 devnull par.srgba = _imgtorgba(src, par.sval);
121 324891a5 2006-06-25 devnull par.sdval = _rgbatoimg(dst, par.srgba);
122 324891a5 2006-06-25 devnull if((par.srgba&0xFF) == 0 && (op&DoutS)){
123 324891a5 2006-06-25 devnull /* if (drawdebug) iprint("fill with transparent source\n"); */
124 324891a5 2006-06-25 devnull return nil; /* no-op successfully handled */
126 324891a5 2006-06-25 devnull if((par.srgba&0xFF) == 0xFF)
127 324891a5 2006-06-25 devnull par.state |= Fullsrc;
131 324891a5 2006-06-25 devnull if(mask->flags & Frepl){
132 324891a5 2006-06-25 devnull par.state |= Replmask;
133 324891a5 2006-06-25 devnull if(Dx(mask->r)==1 && Dy(mask->r)==1){
134 324891a5 2006-06-25 devnull par.mval = pixelbits(mask, mask->r.min);
135 324891a5 2006-06-25 devnull if(par.mval == 0 && (op&DoutS)){
136 324891a5 2006-06-25 devnull /* if(drawdebug) iprint("fill with zero mask\n"); */
137 324891a5 2006-06-25 devnull return nil; /* no-op successfully handled */
139 324891a5 2006-06-25 devnull par.state |= Simplemask;
140 324891a5 2006-06-25 devnull if(par.mval == ~0)
141 324891a5 2006-06-25 devnull par.state |= Fullmask;
142 324891a5 2006-06-25 devnull par.mrgba = _imgtorgba(mask, par.mval);
146 324891a5 2006-06-25 devnull /* if(drawdebug) */
147 324891a5 2006-06-25 devnull /* iprint("dr %R sr %R mr %R...", r, par.sr, par.mr); */
148 324891a5 2006-06-25 devnull DBG print("draw dr %R sr %R mr %R %lux\n", r, par.sr, par.mr, par.state);
150 324891a5 2006-06-25 devnull return ∥
154 324891a5 2006-06-25 devnull _memimagedraw(Memdrawparam *par)
157 324891a5 2006-06-25 devnull * Now that we've clipped the parameters down to be consistent, we
158 324891a5 2006-06-25 devnull * simply try sub-drawing routines in order until we find one that was able
159 324891a5 2006-06-25 devnull * to handle us. If the sub-drawing routine returns zero, it means it was
160 324891a5 2006-06-25 devnull * unable to satisfy the request, so we do not return.
164 324891a5 2006-06-25 devnull * Hardware support. Each video driver provides this function,
165 324891a5 2006-06-25 devnull * which checks to see if there is anything it can help with.
166 324891a5 2006-06-25 devnull * There could be an if around this checking to see if dst is in video memory.
168 324891a5 2006-06-25 devnull DBG print("test hwdraw\n");
169 324891a5 2006-06-25 devnull if(hwdraw(par)){
170 324891a5 2006-06-25 devnull /*if(drawdebug) iprint("hw handled\n"); */
171 324891a5 2006-06-25 devnull DBG print("hwdraw handled\n");
175 324891a5 2006-06-25 devnull * Optimizations using memmove and memset.
177 324891a5 2006-06-25 devnull DBG print("test memoptdraw\n");
178 324891a5 2006-06-25 devnull if(memoptdraw(par)){
179 324891a5 2006-06-25 devnull /*if(drawdebug) iprint("memopt handled\n"); */
180 324891a5 2006-06-25 devnull DBG print("memopt handled\n");
185 324891a5 2006-06-25 devnull * Character drawing.
186 324891a5 2006-06-25 devnull * Solid source color being painted through a boolean mask onto a high res image.
188 324891a5 2006-06-25 devnull DBG print("test chardraw\n");
189 324891a5 2006-06-25 devnull if(chardraw(par)){
190 324891a5 2006-06-25 devnull /*if(drawdebug) iprint("chardraw handled\n"); */
191 324891a5 2006-06-25 devnull DBG print("chardraw handled\n");
196 324891a5 2006-06-25 devnull * General calculation-laden case that does alpha for each pixel.
198 324891a5 2006-06-25 devnull DBG print("do alphadraw\n");
199 324891a5 2006-06-25 devnull alphadraw(par);
200 324891a5 2006-06-25 devnull /*if(drawdebug) iprint("alphadraw handled\n"); */
201 324891a5 2006-06-25 devnull DBG print("alphadraw handled\n");
203 324891a5 2006-06-25 devnull #undef DBG
206 324891a5 2006-06-25 devnull * Clip the destination rectangle further based on the properties of the
207 324891a5 2006-06-25 devnull * source and mask rectangles. Once the destination rectangle is properly
208 324891a5 2006-06-25 devnull * clipped, adjust the source and mask rectangles to be the same size.
209 324891a5 2006-06-25 devnull * Then if source or mask is replicated, move its clipped rectangle
210 324891a5 2006-06-25 devnull * so that its minimum point falls within the repl rectangle.
212 324891a5 2006-06-25 devnull * Return zero if the final rectangle is null.
215 324891a5 2006-06-25 devnull drawclip(Memimage *dst, Rectangle *r, Memimage *src, Point *p0, Memimage *mask, Point *p1, Rectangle *sr, Rectangle *mr)
217 324891a5 2006-06-25 devnull Point rmin, delta;
218 324891a5 2006-06-25 devnull int splitcoords;
219 324891a5 2006-06-25 devnull Rectangle omr;
221 324891a5 2006-06-25 devnull if(r->min.x>=r->max.x || r->min.y>=r->max.y)
222 324891a5 2006-06-25 devnull return 0;
223 324891a5 2006-06-25 devnull splitcoords = (p0->x!=p1->x) || (p0->y!=p1->y);
224 324891a5 2006-06-25 devnull /* clip to destination */
225 324891a5 2006-06-25 devnull rmin = r->min;
226 324891a5 2006-06-25 devnull if(!rectclip(r, dst->r) || !rectclip(r, dst->clipr))
227 324891a5 2006-06-25 devnull return 0;
228 324891a5 2006-06-25 devnull /* move mask point */
229 324891a5 2006-06-25 devnull p1->x += r->min.x-rmin.x;
230 324891a5 2006-06-25 devnull p1->y += r->min.y-rmin.y;
231 324891a5 2006-06-25 devnull /* move source point */
232 324891a5 2006-06-25 devnull p0->x += r->min.x-rmin.x;
233 324891a5 2006-06-25 devnull p0->y += r->min.y-rmin.y;
234 324891a5 2006-06-25 devnull /* map destination rectangle into source */
235 324891a5 2006-06-25 devnull sr->min = *p0;
236 324891a5 2006-06-25 devnull sr->max.x = p0->x+Dx(*r);
237 324891a5 2006-06-25 devnull sr->max.y = p0->y+Dy(*r);
238 324891a5 2006-06-25 devnull /* sr is r in source coordinates; clip to source */
239 324891a5 2006-06-25 devnull if(!(src->flags&Frepl) && !rectclip(sr, src->r))
240 324891a5 2006-06-25 devnull return 0;
241 324891a5 2006-06-25 devnull if(!rectclip(sr, src->clipr))
242 324891a5 2006-06-25 devnull return 0;
243 324891a5 2006-06-25 devnull /* compute and clip rectangle in mask */
244 324891a5 2006-06-25 devnull if(splitcoords){
245 324891a5 2006-06-25 devnull /* move mask point with source */
246 324891a5 2006-06-25 devnull p1->x += sr->min.x-p0->x;
247 324891a5 2006-06-25 devnull p1->y += sr->min.y-p0->y;
248 324891a5 2006-06-25 devnull mr->min = *p1;
249 324891a5 2006-06-25 devnull mr->max.x = p1->x+Dx(*sr);
250 324891a5 2006-06-25 devnull mr->max.y = p1->y+Dy(*sr);
251 324891a5 2006-06-25 devnull omr = *mr;
252 324891a5 2006-06-25 devnull /* mr is now rectangle in mask; clip it */
253 324891a5 2006-06-25 devnull if(!(mask->flags&Frepl) && !rectclip(mr, mask->r))
254 324891a5 2006-06-25 devnull return 0;
255 324891a5 2006-06-25 devnull if(!rectclip(mr, mask->clipr))
256 324891a5 2006-06-25 devnull return 0;
257 324891a5 2006-06-25 devnull /* reflect any clips back to source */
258 324891a5 2006-06-25 devnull sr->min.x += mr->min.x-omr.min.x;
259 324891a5 2006-06-25 devnull sr->min.y += mr->min.y-omr.min.y;
260 324891a5 2006-06-25 devnull sr->max.x += mr->max.x-omr.max.x;
261 324891a5 2006-06-25 devnull sr->max.y += mr->max.y-omr.max.y;
262 324891a5 2006-06-25 devnull *p1 = mr->min;
264 324891a5 2006-06-25 devnull if(!(mask->flags&Frepl) && !rectclip(sr, mask->r))
265 324891a5 2006-06-25 devnull return 0;
266 324891a5 2006-06-25 devnull if(!rectclip(sr, mask->clipr))
267 324891a5 2006-06-25 devnull return 0;
268 324891a5 2006-06-25 devnull *p1 = sr->min;
271 324891a5 2006-06-25 devnull /* move source clipping back to destination */
272 324891a5 2006-06-25 devnull delta.x = r->min.x - p0->x;
273 324891a5 2006-06-25 devnull delta.y = r->min.y - p0->y;
274 324891a5 2006-06-25 devnull r->min.x = sr->min.x + delta.x;
275 324891a5 2006-06-25 devnull r->min.y = sr->min.y + delta.y;
276 324891a5 2006-06-25 devnull r->max.x = sr->max.x + delta.x;
277 324891a5 2006-06-25 devnull r->max.y = sr->max.y + delta.y;
279 324891a5 2006-06-25 devnull /* move source rectangle so sr->min is in src->r */
280 324891a5 2006-06-25 devnull if(src->flags&Frepl) {
281 324891a5 2006-06-25 devnull delta.x = drawreplxy(src->r.min.x, src->r.max.x, sr->min.x) - sr->min.x;
282 324891a5 2006-06-25 devnull delta.y = drawreplxy(src->r.min.y, src->r.max.y, sr->min.y) - sr->min.y;
283 324891a5 2006-06-25 devnull sr->min.x += delta.x;
284 324891a5 2006-06-25 devnull sr->min.y += delta.y;
285 324891a5 2006-06-25 devnull sr->max.x += delta.x;
286 324891a5 2006-06-25 devnull sr->max.y += delta.y;
288 324891a5 2006-06-25 devnull *p0 = sr->min;
290 324891a5 2006-06-25 devnull /* move mask point so it is in mask->r */
291 324891a5 2006-06-25 devnull *p1 = drawrepl(mask->r, *p1);
292 324891a5 2006-06-25 devnull mr->min = *p1;
293 324891a5 2006-06-25 devnull mr->max.x = p1->x+Dx(*sr);
294 324891a5 2006-06-25 devnull mr->max.y = p1->y+Dy(*sr);
296 324891a5 2006-06-25 devnull assert(Dx(*sr) == Dx(*mr) && Dx(*mr) == Dx(*r));
297 324891a5 2006-06-25 devnull assert(Dy(*sr) == Dy(*mr) && Dy(*mr) == Dy(*r));
298 324891a5 2006-06-25 devnull assert(ptinrect(*p0, src->r));
299 324891a5 2006-06-25 devnull assert(ptinrect(*p1, mask->r));
300 324891a5 2006-06-25 devnull assert(ptinrect(r->min, dst->r));
302 324891a5 2006-06-25 devnull return 1;
306 324891a5 2006-06-25 devnull * Conversion tables.
308 324891a5 2006-06-25 devnull static uchar replbit[1+8][256]; /* replbit[x][y] is the replication of the x-bit quantity y to 8-bit depth */
309 324891a5 2006-06-25 devnull static uchar conv18[256][8]; /* conv18[x][y] is the yth pixel in the depth-1 pixel x */
310 324891a5 2006-06-25 devnull static uchar conv28[256][4]; /* ... */
311 324891a5 2006-06-25 devnull static uchar conv48[256][2];
314 324891a5 2006-06-25 devnull * bitmap of how to replicate n bits to fill 8, for 1 ≤ n ≤ 8.
315 324891a5 2006-06-25 devnull * the X's are where to put the bottom (ones) bit of the n-bit pattern.
316 324891a5 2006-06-25 devnull * only the top 8 bits of the result are actually used.
317 324891a5 2006-06-25 devnull * (the lower 8 bits are needed to get bits in the right place
318 324891a5 2006-06-25 devnull * when n is not a divisor of 8.)
320 324891a5 2006-06-25 devnull * Should check to see if its easier to just refer to replmul than
321 324891a5 2006-06-25 devnull * use the precomputed values in replbit. On PCs it may well
322 324891a5 2006-06-25 devnull * be; on machines with slow multiply instructions it probably isn't.
324 324891a5 2006-06-25 devnull #define a ((((((((((((((((0
325 324891a5 2006-06-25 devnull #define X *2+1)
326 324891a5 2006-06-25 devnull #define _ *2)
327 324891a5 2006-06-25 devnull static int replmul[1+8] = {
329 324891a5 2006-06-25 devnull a X X X X X X X X X X X X X X X X,
330 324891a5 2006-06-25 devnull a _ X _ X _ X _ X _ X _ X _ X _ X,
331 324891a5 2006-06-25 devnull a _ _ X _ _ X _ _ X _ _ X _ _ X _,
332 324891a5 2006-06-25 devnull a _ _ _ X _ _ _ X _ _ _ X _ _ _ X,
333 324891a5 2006-06-25 devnull a _ _ _ _ X _ _ _ _ X _ _ _ _ X _,
334 324891a5 2006-06-25 devnull a _ _ _ _ _ X _ _ _ _ _ X _ _ _ _,
335 324891a5 2006-06-25 devnull a _ _ _ _ _ _ X _ _ _ _ _ _ X _ _,
336 324891a5 2006-06-25 devnull a _ _ _ _ _ _ _ X _ _ _ _ _ _ _ X,
338 324891a5 2006-06-25 devnull #undef a
339 324891a5 2006-06-25 devnull #undef X
340 324891a5 2006-06-25 devnull #undef _
342 324891a5 2006-06-25 devnull static void
343 324891a5 2006-06-25 devnull mktables(void)
345 324891a5 2006-06-25 devnull int i, j, mask, sh, small;
347 324891a5 2006-06-25 devnull if(tablesbuilt)
350 324891a5 2006-06-25 devnull fmtinstall('R', Rfmt);
351 324891a5 2006-06-25 devnull fmtinstall('P', Pfmt);
352 324891a5 2006-06-25 devnull tablesbuilt = 1;
354 324891a5 2006-06-25 devnull /* bit replication up to 8 bits */
355 324891a5 2006-06-25 devnull for(i=0; i<256; i++){
356 324891a5 2006-06-25 devnull for(j=0; j<=8; j++){ /* j <= 8 [sic] */
357 324891a5 2006-06-25 devnull small = i & ((1<<j)-1);
358 324891a5 2006-06-25 devnull replbit[j][i] = (small*replmul[j])>>8;
362 324891a5 2006-06-25 devnull /* bit unpacking up to 8 bits, only powers of 2 */
363 324891a5 2006-06-25 devnull for(i=0; i<256; i++){
364 324891a5 2006-06-25 devnull for(j=0, sh=7, mask=1; j<8; j++, sh--)
365 324891a5 2006-06-25 devnull conv18[i][j] = replbit[1][(i>>sh)&mask];
367 324891a5 2006-06-25 devnull for(j=0, sh=6, mask=3; j<4; j++, sh-=2)
368 324891a5 2006-06-25 devnull conv28[i][j] = replbit[2][(i>>sh)&mask];
370 324891a5 2006-06-25 devnull for(j=0, sh=4, mask=15; j<2; j++, sh-=4)
371 324891a5 2006-06-25 devnull conv48[i][j] = replbit[4][(i>>sh)&mask];
375 324891a5 2006-06-25 devnull static uchar ones = 0xff;
378 324891a5 2006-06-25 devnull * General alpha drawing case. Can handle anything.
380 324891a5 2006-06-25 devnull typedef struct Buffer Buffer;
381 324891a5 2006-06-25 devnull struct Buffer {
382 324891a5 2006-06-25 devnull /* used by most routines */
383 324891a5 2006-06-25 devnull uchar *red;
384 324891a5 2006-06-25 devnull uchar *grn;
385 324891a5 2006-06-25 devnull uchar *blu;
386 324891a5 2006-06-25 devnull uchar *alpha;
387 324891a5 2006-06-25 devnull uchar *grey;
388 324891a5 2006-06-25 devnull u32int *rgba;
389 324891a5 2006-06-25 devnull int delta; /* number of bytes to add to pointer to get next pixel to the right */
391 324891a5 2006-06-25 devnull /* used by boolcalc* for mask data */
392 324891a5 2006-06-25 devnull uchar *m; /* ptr to mask data r.min byte; like p->bytermin */
393 324891a5 2006-06-25 devnull int mskip; /* no. of left bits to skip in *m */
394 324891a5 2006-06-25 devnull uchar *bm; /* ptr to mask data img->r.min byte; like p->bytey0s */
395 324891a5 2006-06-25 devnull int bmskip; /* no. of left bits to skip in *bm */
396 324891a5 2006-06-25 devnull uchar *em; /* ptr to mask data img->r.max.x byte; like p->bytey0e */
397 324891a5 2006-06-25 devnull int emskip; /* no. of right bits to skip in *em */
400 324891a5 2006-06-25 devnull typedef struct Param Param;
401 324891a5 2006-06-25 devnull typedef Buffer Readfn(Param*, uchar*, int);
402 324891a5 2006-06-25 devnull typedef void Writefn(Param*, uchar*, Buffer);
403 324891a5 2006-06-25 devnull typedef Buffer Calcfn(Buffer, Buffer, Buffer, int, int, int);
406 324891a5 2006-06-25 devnull MAXBCACHE = 16
409 324891a5 2006-06-25 devnull /* giant rathole to customize functions with */
410 324891a5 2006-06-25 devnull struct Param {
411 324891a5 2006-06-25 devnull Readfn *replcall;
412 324891a5 2006-06-25 devnull Readfn *greymaskcall;
413 324891a5 2006-06-25 devnull Readfn *convreadcall;
414 324891a5 2006-06-25 devnull Writefn *convwritecall;
416 324891a5 2006-06-25 devnull Memimage *img;
417 324891a5 2006-06-25 devnull Rectangle r;
418 324891a5 2006-06-25 devnull int dx; /* of r */
419 324891a5 2006-06-25 devnull int needbuf;
420 324891a5 2006-06-25 devnull int convgrey;
421 324891a5 2006-06-25 devnull int alphaonly;
423 324891a5 2006-06-25 devnull uchar *bytey0s; /* byteaddr(Pt(img->r.min.x, img->r.min.y)) */
424 324891a5 2006-06-25 devnull uchar *bytermin; /* byteaddr(Pt(r.min.x, img->r.min.y)) */
425 324891a5 2006-06-25 devnull uchar *bytey0e; /* byteaddr(Pt(img->r.max.x, img->r.min.y)) */
426 324891a5 2006-06-25 devnull int bwidth;
428 324891a5 2006-06-25 devnull int replcache; /* if set, cache buffers */
429 324891a5 2006-06-25 devnull Buffer bcache[MAXBCACHE];
430 324891a5 2006-06-25 devnull u32int bfilled;
431 324891a5 2006-06-25 devnull uchar *bufbase;
432 324891a5 2006-06-25 devnull int bufoff;
433 324891a5 2006-06-25 devnull int bufdelta;
435 324891a5 2006-06-25 devnull int dir;
437 324891a5 2006-06-25 devnull int convbufoff;
438 324891a5 2006-06-25 devnull uchar *convbuf;
439 324891a5 2006-06-25 devnull Param *convdpar;
440 324891a5 2006-06-25 devnull int convdx;
443 324891a5 2006-06-25 devnull static uchar *drawbuf;
444 324891a5 2006-06-25 devnull static int ndrawbuf;
445 324891a5 2006-06-25 devnull static int mdrawbuf;
446 324891a5 2006-06-25 devnull static Param spar, mpar, dpar; /* easier on the stacks */
447 324891a5 2006-06-25 devnull static Readfn greymaskread, replread, readptr;
448 324891a5 2006-06-25 devnull static Writefn nullwrite;
449 324891a5 2006-06-25 devnull static Calcfn alphacalc0, alphacalc14, alphacalc2810, alphacalc3679, alphacalc5, alphacalc11, alphacalcS;
450 324891a5 2006-06-25 devnull static Calcfn boolcalc14, boolcalc236789, boolcalc1011;
452 324891a5 2006-06-25 devnull static Readfn* readfn(Memimage*);
453 324891a5 2006-06-25 devnull static Readfn* readalphafn(Memimage*);
454 324891a5 2006-06-25 devnull static Writefn* writefn(Memimage*);
456 324891a5 2006-06-25 devnull static Calcfn* boolcopyfn(Memimage*, Memimage*);
457 324891a5 2006-06-25 devnull static Readfn* convfn(Memimage*, Param*, Memimage*, Param*);
459 324891a5 2006-06-25 devnull static Calcfn *alphacalc[Ncomp] =
461 324891a5 2006-06-25 devnull alphacalc0, /* Clear */
462 324891a5 2006-06-25 devnull alphacalc14, /* DoutS */
463 324891a5 2006-06-25 devnull alphacalc2810, /* SoutD */
464 324891a5 2006-06-25 devnull alphacalc3679, /* DxorS */
465 324891a5 2006-06-25 devnull alphacalc14, /* DinS */
466 324891a5 2006-06-25 devnull alphacalc5, /* D */
467 324891a5 2006-06-25 devnull alphacalc3679, /* DatopS */
468 324891a5 2006-06-25 devnull alphacalc3679, /* DoverS */
469 324891a5 2006-06-25 devnull alphacalc2810, /* SinD */
470 324891a5 2006-06-25 devnull alphacalc3679, /* SatopD */
471 324891a5 2006-06-25 devnull alphacalc2810, /* S */
472 324891a5 2006-06-25 devnull alphacalc11, /* SoverD */
475 324891a5 2006-06-25 devnull static Calcfn *boolcalc[Ncomp] =
477 324891a5 2006-06-25 devnull alphacalc0, /* Clear */
478 324891a5 2006-06-25 devnull boolcalc14, /* DoutS */
479 324891a5 2006-06-25 devnull boolcalc236789, /* SoutD */
480 324891a5 2006-06-25 devnull boolcalc236789, /* DxorS */
481 324891a5 2006-06-25 devnull boolcalc14, /* DinS */
482 324891a5 2006-06-25 devnull alphacalc5, /* D */
483 324891a5 2006-06-25 devnull boolcalc236789, /* DatopS */
484 324891a5 2006-06-25 devnull boolcalc236789, /* DoverS */
485 324891a5 2006-06-25 devnull boolcalc236789, /* SinD */
486 324891a5 2006-06-25 devnull boolcalc236789, /* SatopD */
487 324891a5 2006-06-25 devnull boolcalc1011, /* S */
488 324891a5 2006-06-25 devnull boolcalc1011, /* SoverD */
491 324891a5 2006-06-25 devnull static int
492 324891a5 2006-06-25 devnull allocdrawbuf(void)
494 324891a5 2006-06-25 devnull uchar *p;
496 324891a5 2006-06-25 devnull if(ndrawbuf > mdrawbuf){
497 324891a5 2006-06-25 devnull p = realloc(drawbuf, ndrawbuf);
498 324891a5 2006-06-25 devnull if(p == nil){
499 324891a5 2006-06-25 devnull werrstr("memimagedraw out of memory");
500 324891a5 2006-06-25 devnull return -1;
502 324891a5 2006-06-25 devnull drawbuf = p;
503 324891a5 2006-06-25 devnull mdrawbuf = ndrawbuf;
505 324891a5 2006-06-25 devnull return 0;
508 324891a5 2006-06-25 devnull static void
509 324891a5 2006-06-25 devnull getparam(Param *p, Memimage *img, Rectangle r, int convgrey, int needbuf)
511 324891a5 2006-06-25 devnull int nbuf;
513 324891a5 2006-06-25 devnull memset(p, 0, sizeof *p);
515 324891a5 2006-06-25 devnull p->img = img;
516 324891a5 2006-06-25 devnull p->r = r;
517 324891a5 2006-06-25 devnull p->dx = Dx(r);
518 324891a5 2006-06-25 devnull p->needbuf = needbuf;
519 324891a5 2006-06-25 devnull p->convgrey = convgrey;
521 324891a5 2006-06-25 devnull assert(img->r.min.x <= r.min.x && r.min.x < img->r.max.x);
523 324891a5 2006-06-25 devnull p->bytey0s = byteaddr(img, Pt(img->r.min.x, img->r.min.y));
524 324891a5 2006-06-25 devnull p->bytermin = byteaddr(img, Pt(r.min.x, img->r.min.y));
525 324891a5 2006-06-25 devnull p->bytey0e = byteaddr(img, Pt(img->r.max.x, img->r.min.y));
526 324891a5 2006-06-25 devnull p->bwidth = sizeof(u32int)*img->width;
528 324891a5 2006-06-25 devnull assert(p->bytey0s <= p->bytermin && p->bytermin <= p->bytey0e);
530 324891a5 2006-06-25 devnull if(p->r.min.x == p->img->r.min.x)
531 324891a5 2006-06-25 devnull assert(p->bytermin == p->bytey0s);
533 324891a5 2006-06-25 devnull nbuf = 1;
534 324891a5 2006-06-25 devnull if((img->flags&Frepl) && Dy(img->r) <= MAXBCACHE && Dy(img->r) < Dy(r)){
535 324891a5 2006-06-25 devnull p->replcache = 1;
536 324891a5 2006-06-25 devnull nbuf = Dy(img->r);
538 324891a5 2006-06-25 devnull p->bufdelta = 4*p->dx;
539 324891a5 2006-06-25 devnull p->bufoff = ndrawbuf;
540 324891a5 2006-06-25 devnull ndrawbuf += p->bufdelta*nbuf;
543 324891a5 2006-06-25 devnull static void
544 324891a5 2006-06-25 devnull clipy(Memimage *img, int *y)
548 324891a5 2006-06-25 devnull dy = Dy(img->r);
549 324891a5 2006-06-25 devnull if(*y == dy)
551 324891a5 2006-06-25 devnull else if(*y == -1)
552 324891a5 2006-06-25 devnull *y = dy-1;
553 324891a5 2006-06-25 devnull assert(0 <= *y && *y < dy);
556 324891a5 2006-06-25 devnull static void
557 324891a5 2006-06-25 devnull dumpbuf(char *s, Buffer b, int n)
560 324891a5 2006-06-25 devnull uchar *p;
562 324891a5 2006-06-25 devnull print("%s", s);
563 324891a5 2006-06-25 devnull for(i=0; i<n; i++){
564 324891a5 2006-06-25 devnull print(" ");
565 324891a5 2006-06-25 devnull if(p=b.grey){
566 324891a5 2006-06-25 devnull print(" k%.2uX", *p);
567 324891a5 2006-06-25 devnull b.grey += b.delta;
569 324891a5 2006-06-25 devnull if(p=b.red){
570 324891a5 2006-06-25 devnull print(" r%.2uX", *p);
571 324891a5 2006-06-25 devnull b.red += b.delta;
573 324891a5 2006-06-25 devnull if(p=b.grn){
574 324891a5 2006-06-25 devnull print(" g%.2uX", *p);
575 324891a5 2006-06-25 devnull b.grn += b.delta;
577 324891a5 2006-06-25 devnull if(p=b.blu){
578 324891a5 2006-06-25 devnull print(" b%.2uX", *p);
579 324891a5 2006-06-25 devnull b.blu += b.delta;
582 324891a5 2006-06-25 devnull if((p=b.alpha) != &ones){
583 324891a5 2006-06-25 devnull print(" α%.2uX", *p);
584 324891a5 2006-06-25 devnull b.alpha += b.delta;
587 324891a5 2006-06-25 devnull print("\n");
591 324891a5 2006-06-25 devnull * For each scan line, we expand the pixels from source, mask, and destination
592 324891a5 2006-06-25 devnull * into byte-aligned red, green, blue, alpha, and grey channels. If buffering is not
593 324891a5 2006-06-25 devnull * needed and the channels were already byte-aligned (grey8, rgb24, rgba32, rgb32),
594 324891a5 2006-06-25 devnull * the readers need not copy the data: they can simply return pointers to the data.
595 324891a5 2006-06-25 devnull * If the destination image is grey and the source is not, it is converted using the NTSC
596 324891a5 2006-06-25 devnull * formula.
598 324891a5 2006-06-25 devnull * Once we have all the channels, we call either rgbcalc or greycalc, depending on
599 324891a5 2006-06-25 devnull * whether the destination image is color. This is allowed to overwrite the dst buffer (perhaps
600 324891a5 2006-06-25 devnull * the actual data, perhaps a copy) with its result. It should only overwrite the dst buffer
601 324891a5 2006-06-25 devnull * with the same format (i.e. red bytes with red bytes, etc.) A new buffer is returned from
602 324891a5 2006-06-25 devnull * the calculator, and that buffer is passed to a function to write it to the destination.
603 324891a5 2006-06-25 devnull * If the buffer is already pointing at the destination, the writing function is a no-op.
605 324891a5 2006-06-25 devnull #define DBG if(drawdebug)
606 324891a5 2006-06-25 devnull static int
607 324891a5 2006-06-25 devnull alphadraw(Memdrawparam *par)
609 324891a5 2006-06-25 devnull int isgrey, starty, endy, op;
610 324891a5 2006-06-25 devnull int needbuf, dsty, srcy, masky;
611 324891a5 2006-06-25 devnull int y, dir, dx, dy;
612 324891a5 2006-06-25 devnull Buffer bsrc, bdst, bmask;
613 324891a5 2006-06-25 devnull Readfn *rdsrc, *rdmask, *rddst;
614 324891a5 2006-06-25 devnull Calcfn *calc;
615 324891a5 2006-06-25 devnull Writefn *wrdst;
616 324891a5 2006-06-25 devnull Memimage *src, *mask, *dst;
617 324891a5 2006-06-25 devnull Rectangle r, sr, mr;
619 324891a5 2006-06-25 devnull if(drawdebug)
620 324891a5 2006-06-25 devnull print("alphadraw %R\n", par->r);
621 324891a5 2006-06-25 devnull r = par->r;
622 324891a5 2006-06-25 devnull dx = Dx(r);
623 324891a5 2006-06-25 devnull dy = Dy(r);
625 324891a5 2006-06-25 devnull ndrawbuf = 0;
627 324891a5 2006-06-25 devnull src = par->src;
628 324891a5 2006-06-25 devnull mask = par->mask;
629 324891a5 2006-06-25 devnull dst = par->dst;
630 324891a5 2006-06-25 devnull sr = par->sr;
631 324891a5 2006-06-25 devnull mr = par->mr;
632 324891a5 2006-06-25 devnull op = par->op;
634 324891a5 2006-06-25 devnull isgrey = dst->flags&Fgrey;
637 324891a5 2006-06-25 devnull * Buffering when src and dst are the same bitmap is sufficient but not
638 324891a5 2006-06-25 devnull * necessary. There are stronger conditions we could use. We could
639 324891a5 2006-06-25 devnull * check to see if the rectangles intersect, and if simply moving in the
640 324891a5 2006-06-25 devnull * correct y direction can avoid the need to buffer.
642 324891a5 2006-06-25 devnull needbuf = (src->data == dst->data);
644 324891a5 2006-06-25 devnull getparam(&spar, src, sr, isgrey, needbuf);
645 324891a5 2006-06-25 devnull getparam(&dpar, dst, r, isgrey, needbuf);
646 324891a5 2006-06-25 devnull getparam(&mpar, mask, mr, 0, needbuf);
648 324891a5 2006-06-25 devnull dir = (needbuf && byteaddr(dst, r.min) > byteaddr(src, sr.min)) ? -1 : 1;
649 324891a5 2006-06-25 devnull spar.dir = mpar.dir = dpar.dir = dir;
652 324891a5 2006-06-25 devnull * If the mask is purely boolean, we can convert from src to dst format
653 324891a5 2006-06-25 devnull * when we read src, and then just copy it to dst where the mask tells us to.
654 324891a5 2006-06-25 devnull * This requires a boolean (1-bit grey) mask and lack of a source alpha channel.
656 324891a5 2006-06-25 devnull * The computation is accomplished by assigning the function pointers as follows:
657 324891a5 2006-06-25 devnull * rdsrc - read and convert source into dst format in a buffer
658 324891a5 2006-06-25 devnull * rdmask - convert mask to bytes, set pointer to it
659 324891a5 2006-06-25 devnull * rddst - fill with pointer to real dst data, but do no reads
660 324891a5 2006-06-25 devnull * calc - copy src onto dst when mask says to.
661 324891a5 2006-06-25 devnull * wrdst - do nothing
662 324891a5 2006-06-25 devnull * This is slightly sleazy, since things aren't doing exactly what their names say,
663 324891a5 2006-06-25 devnull * but it avoids a fair amount of code duplication to make this a case here
664 324891a5 2006-06-25 devnull * rather than have a separate booldraw.
666 324891a5 2006-06-25 devnull /*if(drawdebug) iprint("flag %lud mchan %lux=?%x dd %d\n", src->flags&Falpha, mask->chan, GREY1, dst->depth); */
667 324891a5 2006-06-25 devnull if(!(src->flags&Falpha) && mask->chan == GREY1 && dst->depth >= 8 && op == SoverD){
668 324891a5 2006-06-25 devnull /*if(drawdebug) iprint("boolcopy..."); */
669 324891a5 2006-06-25 devnull rdsrc = convfn(dst, &dpar, src, &spar);
670 324891a5 2006-06-25 devnull rddst = readptr;
671 324891a5 2006-06-25 devnull rdmask = readfn(mask);
672 324891a5 2006-06-25 devnull calc = boolcopyfn(dst, mask);
673 324891a5 2006-06-25 devnull wrdst = nullwrite;
675 324891a5 2006-06-25 devnull /* usual alphadraw parameter fetching */
676 324891a5 2006-06-25 devnull rdsrc = readfn(src);
677 324891a5 2006-06-25 devnull rddst = readfn(dst);
678 324891a5 2006-06-25 devnull wrdst = writefn(dst);
679 324891a5 2006-06-25 devnull calc = alphacalc[op];
682 324891a5 2006-06-25 devnull * If there is no alpha channel, we'll ask for a grey channel
683 324891a5 2006-06-25 devnull * and pretend it is the alpha.
685 324891a5 2006-06-25 devnull if(mask->flags&Falpha){
686 324891a5 2006-06-25 devnull rdmask = readalphafn(mask);
687 324891a5 2006-06-25 devnull mpar.alphaonly = 1;
689 324891a5 2006-06-25 devnull mpar.greymaskcall = readfn(mask);
690 324891a5 2006-06-25 devnull mpar.convgrey = 1;
691 324891a5 2006-06-25 devnull rdmask = greymaskread;
694 324891a5 2006-06-25 devnull * Should really be above, but then boolcopyfns would have
695 324891a5 2006-06-25 devnull * to deal with bit alignment, and I haven't written that.
697 324891a5 2006-06-25 devnull * This is a common case for things like ellipse drawing.
698 324891a5 2006-06-25 devnull * When there's no alpha involved and the mask is boolean,
699 324891a5 2006-06-25 devnull * we can avoid all the division and multiplication.
701 324891a5 2006-06-25 devnull if(mask->chan == GREY1 && !(src->flags&Falpha))
702 324891a5 2006-06-25 devnull calc = boolcalc[op];
703 324891a5 2006-06-25 devnull else if(op == SoverD && !(src->flags&Falpha))
704 324891a5 2006-06-25 devnull calc = alphacalcS;
709 324891a5 2006-06-25 devnull * If the image has a small enough repl rectangle,
710 324891a5 2006-06-25 devnull * we can just read each line once and cache them.
712 324891a5 2006-06-25 devnull if(spar.replcache){
713 324891a5 2006-06-25 devnull spar.replcall = rdsrc;
714 324891a5 2006-06-25 devnull rdsrc = replread;
716 324891a5 2006-06-25 devnull if(mpar.replcache){
717 324891a5 2006-06-25 devnull mpar.replcall = rdmask;
718 324891a5 2006-06-25 devnull rdmask = replread;
721 324891a5 2006-06-25 devnull if(allocdrawbuf() < 0)
722 324891a5 2006-06-25 devnull return 0;
725 324891a5 2006-06-25 devnull * Before we were saving only offsets from drawbuf in the parameter
726 324891a5 2006-06-25 devnull * structures; now that drawbuf has been grown to accomodate us,
727 324891a5 2006-06-25 devnull * we can fill in the pointers.
729 324891a5 2006-06-25 devnull spar.bufbase = drawbuf+spar.bufoff;
730 324891a5 2006-06-25 devnull mpar.bufbase = drawbuf+mpar.bufoff;
731 324891a5 2006-06-25 devnull dpar.bufbase = drawbuf+dpar.bufoff;
732 324891a5 2006-06-25 devnull spar.convbuf = drawbuf+spar.convbufoff;
734 324891a5 2006-06-25 devnull if(dir == 1){
735 324891a5 2006-06-25 devnull starty = 0;
736 324891a5 2006-06-25 devnull endy = dy;
738 324891a5 2006-06-25 devnull starty = dy-1;
739 324891a5 2006-06-25 devnull endy = -1;
743 324891a5 2006-06-25 devnull * srcy, masky, and dsty are offsets from the top of their
744 324891a5 2006-06-25 devnull * respective Rectangles. they need to be contained within
745 324891a5 2006-06-25 devnull * the rectangles, so clipy can keep them there without division.
747 324891a5 2006-06-25 devnull srcy = (starty + sr.min.y - src->r.min.y)%Dy(src->r);
748 324891a5 2006-06-25 devnull masky = (starty + mr.min.y - mask->r.min.y)%Dy(mask->r);
749 324891a5 2006-06-25 devnull dsty = starty + r.min.y - dst->r.min.y;
751 324891a5 2006-06-25 devnull assert(0 <= srcy && srcy < Dy(src->r));
752 324891a5 2006-06-25 devnull assert(0 <= masky && masky < Dy(mask->r));
753 324891a5 2006-06-25 devnull assert(0 <= dsty && dsty < Dy(dst->r));
755 324891a5 2006-06-25 devnull if(drawdebug)
756 324891a5 2006-06-25 devnull print("alphadraw: rdsrc=%p rdmask=%p rddst=%p calc=%p wrdst=%p\n",
757 324891a5 2006-06-25 devnull rdsrc, rdmask, rddst, calc, wrdst);
758 324891a5 2006-06-25 devnull for(y=starty; y!=endy; y+=dir, srcy+=dir, masky+=dir, dsty+=dir){
759 324891a5 2006-06-25 devnull clipy(src, &srcy);
760 324891a5 2006-06-25 devnull clipy(dst, &dsty);
761 324891a5 2006-06-25 devnull clipy(mask, &masky);
763 324891a5 2006-06-25 devnull bsrc = rdsrc(&spar, spar.bufbase, srcy);
764 324891a5 2006-06-25 devnull DBG print("[");
765 324891a5 2006-06-25 devnull bmask = rdmask(&mpar, mpar.bufbase, masky);
766 324891a5 2006-06-25 devnull DBG print("]\n");
767 324891a5 2006-06-25 devnull bdst = rddst(&dpar, dpar.bufbase, dsty);
768 324891a5 2006-06-25 devnull DBG dumpbuf("src", bsrc, dx);
769 324891a5 2006-06-25 devnull DBG dumpbuf("mask", bmask, dx);
770 324891a5 2006-06-25 devnull DBG dumpbuf("dst", bdst, dx);
771 324891a5 2006-06-25 devnull bdst = calc(bdst, bsrc, bmask, dx, isgrey, op);
772 324891a5 2006-06-25 devnull DBG dumpbuf("bdst", bdst, dx);
773 324891a5 2006-06-25 devnull wrdst(&dpar, dpar.bytermin+dsty*dpar.bwidth, bdst);
776 324891a5 2006-06-25 devnull return 1;
778 324891a5 2006-06-25 devnull #undef DBG
780 324891a5 2006-06-25 devnull static Buffer
781 324891a5 2006-06-25 devnull alphacalc0(Buffer bdst, Buffer b1, Buffer b2, int dx, int grey, int op)
783 324891a5 2006-06-25 devnull USED(grey);
784 324891a5 2006-06-25 devnull USED(op);
785 324891a5 2006-06-25 devnull memset(bdst.rgba, 0, dx*bdst.delta);
786 324891a5 2006-06-25 devnull return bdst;
789 324891a5 2006-06-25 devnull static Buffer
790 324891a5 2006-06-25 devnull alphacalc14(Buffer bdst, Buffer bsrc, Buffer bmask, int dx, int grey, int op)
792 324891a5 2006-06-25 devnull Buffer obdst;
793 324891a5 2006-06-25 devnull int fd, sadelta;
794 324891a5 2006-06-25 devnull int i, sa, ma, q;
795 324891a5 2006-06-25 devnull u32int s, t;
797 324891a5 2006-06-25 devnull obdst = bdst;
798 324891a5 2006-06-25 devnull sadelta = bsrc.alpha == &ones ? 0 : bsrc.delta;
799 324891a5 2006-06-25 devnull q = bsrc.delta == 4 && bdst.delta == 4;
801 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
802 324891a5 2006-06-25 devnull sa = *bsrc.alpha;
803 324891a5 2006-06-25 devnull ma = *bmask.alpha;
804 324891a5 2006-06-25 devnull fd = MUL(sa, ma, t);
805 324891a5 2006-06-25 devnull if(op == DoutS)
806 324891a5 2006-06-25 devnull fd = 255-fd;
808 324891a5 2006-06-25 devnull if(grey){
809 324891a5 2006-06-25 devnull *bdst.grey = MUL(fd, *bdst.grey, t);
810 324891a5 2006-06-25 devnull bsrc.grey += bsrc.delta;
811 324891a5 2006-06-25 devnull bdst.grey += bdst.delta;
814 324891a5 2006-06-25 devnull *bdst.rgba = MUL0123(fd, *bdst.rgba, s, t);
815 324891a5 2006-06-25 devnull bsrc.rgba++;
816 324891a5 2006-06-25 devnull bdst.rgba++;
817 324891a5 2006-06-25 devnull bsrc.alpha += sadelta;
818 324891a5 2006-06-25 devnull bmask.alpha += bmask.delta;
819 324891a5 2006-06-25 devnull continue;
821 324891a5 2006-06-25 devnull *bdst.red = MUL(fd, *bdst.red, t);
822 324891a5 2006-06-25 devnull *bdst.grn = MUL(fd, *bdst.grn, t);
823 324891a5 2006-06-25 devnull *bdst.blu = MUL(fd, *bdst.blu, t);
824 324891a5 2006-06-25 devnull bsrc.red += bsrc.delta;
825 324891a5 2006-06-25 devnull bsrc.blu += bsrc.delta;
826 324891a5 2006-06-25 devnull bsrc.grn += bsrc.delta;
827 324891a5 2006-06-25 devnull bdst.red += bdst.delta;
828 324891a5 2006-06-25 devnull bdst.blu += bdst.delta;
829 324891a5 2006-06-25 devnull bdst.grn += bdst.delta;
831 324891a5 2006-06-25 devnull if(bdst.alpha != &ones){
832 324891a5 2006-06-25 devnull *bdst.alpha = MUL(fd, *bdst.alpha, t);
833 324891a5 2006-06-25 devnull bdst.alpha += bdst.delta;
835 324891a5 2006-06-25 devnull bmask.alpha += bmask.delta;
836 324891a5 2006-06-25 devnull bsrc.alpha += sadelta;
838 324891a5 2006-06-25 devnull return obdst;
841 324891a5 2006-06-25 devnull static Buffer
842 324891a5 2006-06-25 devnull alphacalc2810(Buffer bdst, Buffer bsrc, Buffer bmask, int dx, int grey, int op)
844 324891a5 2006-06-25 devnull Buffer obdst;
845 324891a5 2006-06-25 devnull int fs, sadelta;
846 324891a5 2006-06-25 devnull int i, ma, da, q;
847 324891a5 2006-06-25 devnull u32int s, t;
849 324891a5 2006-06-25 devnull obdst = bdst;
850 324891a5 2006-06-25 devnull sadelta = bsrc.alpha == &ones ? 0 : bsrc.delta;
851 324891a5 2006-06-25 devnull q = bsrc.delta == 4 && bdst.delta == 4;
853 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
854 324891a5 2006-06-25 devnull ma = *bmask.alpha;
855 324891a5 2006-06-25 devnull da = *bdst.alpha;
856 324891a5 2006-06-25 devnull if(op == SoutD)
857 324891a5 2006-06-25 devnull da = 255-da;
858 324891a5 2006-06-25 devnull fs = ma;
859 324891a5 2006-06-25 devnull if(op != S)
860 324891a5 2006-06-25 devnull fs = MUL(fs, da, t);
862 324891a5 2006-06-25 devnull if(grey){
863 324891a5 2006-06-25 devnull *bdst.grey = MUL(fs, *bsrc.grey, t);
864 324891a5 2006-06-25 devnull bsrc.grey += bsrc.delta;
865 324891a5 2006-06-25 devnull bdst.grey += bdst.delta;
868 324891a5 2006-06-25 devnull *bdst.rgba = MUL0123(fs, *bsrc.rgba, s, t);
869 324891a5 2006-06-25 devnull bsrc.rgba++;
870 324891a5 2006-06-25 devnull bdst.rgba++;
871 324891a5 2006-06-25 devnull bmask.alpha += bmask.delta;
872 324891a5 2006-06-25 devnull bdst.alpha += bdst.delta;
873 324891a5 2006-06-25 devnull continue;
875 324891a5 2006-06-25 devnull *bdst.red = MUL(fs, *bsrc.red, t);
876 324891a5 2006-06-25 devnull *bdst.grn = MUL(fs, *bsrc.grn, t);
877 324891a5 2006-06-25 devnull *bdst.blu = MUL(fs, *bsrc.blu, t);
878 324891a5 2006-06-25 devnull bsrc.red += bsrc.delta;
879 324891a5 2006-06-25 devnull bsrc.blu += bsrc.delta;
880 324891a5 2006-06-25 devnull bsrc.grn += bsrc.delta;
881 324891a5 2006-06-25 devnull bdst.red += bdst.delta;
882 324891a5 2006-06-25 devnull bdst.blu += bdst.delta;
883 324891a5 2006-06-25 devnull bdst.grn += bdst.delta;
885 324891a5 2006-06-25 devnull if(bdst.alpha != &ones){
886 324891a5 2006-06-25 devnull *bdst.alpha = MUL(fs, *bsrc.alpha, t);
887 324891a5 2006-06-25 devnull bdst.alpha += bdst.delta;
889 324891a5 2006-06-25 devnull bmask.alpha += bmask.delta;
890 324891a5 2006-06-25 devnull bsrc.alpha += sadelta;
892 324891a5 2006-06-25 devnull return obdst;
895 324891a5 2006-06-25 devnull static Buffer
896 324891a5 2006-06-25 devnull alphacalc3679(Buffer bdst, Buffer bsrc, Buffer bmask, int dx, int grey, int op)
898 324891a5 2006-06-25 devnull Buffer obdst;
899 324891a5 2006-06-25 devnull int fs, fd, sadelta;
900 324891a5 2006-06-25 devnull int i, sa, ma, da, q;
901 324891a5 2006-06-25 devnull u32int s, t, u, v;
903 324891a5 2006-06-25 devnull obdst = bdst;
904 324891a5 2006-06-25 devnull sadelta = bsrc.alpha == &ones ? 0 : bsrc.delta;
905 324891a5 2006-06-25 devnull q = bsrc.delta == 4 && bdst.delta == 4;
907 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
908 324891a5 2006-06-25 devnull sa = *bsrc.alpha;
909 324891a5 2006-06-25 devnull ma = *bmask.alpha;
910 324891a5 2006-06-25 devnull da = *bdst.alpha;
911 324891a5 2006-06-25 devnull if(op == SatopD)
912 324891a5 2006-06-25 devnull fs = MUL(ma, da, t);
914 324891a5 2006-06-25 devnull fs = MUL(ma, 255-da, t);
915 324891a5 2006-06-25 devnull if(op == DoverS)
916 324891a5 2006-06-25 devnull fd = 255;
918 324891a5 2006-06-25 devnull fd = MUL(sa, ma, t);
919 324891a5 2006-06-25 devnull if(op != DatopS)
920 324891a5 2006-06-25 devnull fd = 255-fd;
923 324891a5 2006-06-25 devnull if(grey){
924 324891a5 2006-06-25 devnull *bdst.grey = MUL(fs, *bsrc.grey, s)+MUL(fd, *bdst.grey, t);
925 324891a5 2006-06-25 devnull bsrc.grey += bsrc.delta;
926 324891a5 2006-06-25 devnull bdst.grey += bdst.delta;
929 324891a5 2006-06-25 devnull *bdst.rgba = MUL0123(fs, *bsrc.rgba, s, t)+MUL0123(fd, *bdst.rgba, u, v);
930 324891a5 2006-06-25 devnull bsrc.rgba++;
931 324891a5 2006-06-25 devnull bdst.rgba++;
932 324891a5 2006-06-25 devnull bsrc.alpha += sadelta;
933 324891a5 2006-06-25 devnull bmask.alpha += bmask.delta;
934 324891a5 2006-06-25 devnull bdst.alpha += bdst.delta;
935 324891a5 2006-06-25 devnull continue;
937 324891a5 2006-06-25 devnull *bdst.red = MUL(fs, *bsrc.red, s)+MUL(fd, *bdst.red, t);
938 324891a5 2006-06-25 devnull *bdst.grn = MUL(fs, *bsrc.grn, s)+MUL(fd, *bdst.grn, t);
939 324891a5 2006-06-25 devnull *bdst.blu = MUL(fs, *bsrc.blu, s)+MUL(fd, *bdst.blu, t);
940 324891a5 2006-06-25 devnull bsrc.red += bsrc.delta;
941 324891a5 2006-06-25 devnull bsrc.blu += bsrc.delta;
942 324891a5 2006-06-25 devnull bsrc.grn += bsrc.delta;
943 324891a5 2006-06-25 devnull bdst.red += bdst.delta;
944 324891a5 2006-06-25 devnull bdst.blu += bdst.delta;
945 324891a5 2006-06-25 devnull bdst.grn += bdst.delta;
947 324891a5 2006-06-25 devnull if(bdst.alpha != &ones){
948 324891a5 2006-06-25 devnull *bdst.alpha = MUL(fs, sa, s)+MUL(fd, da, t);
949 324891a5 2006-06-25 devnull bdst.alpha += bdst.delta;
951 324891a5 2006-06-25 devnull bmask.alpha += bmask.delta;
952 324891a5 2006-06-25 devnull bsrc.alpha += sadelta;
954 324891a5 2006-06-25 devnull return obdst;
957 324891a5 2006-06-25 devnull static Buffer
958 324891a5 2006-06-25 devnull alphacalc5(Buffer bdst, Buffer b1, Buffer b2, int dx, int grey, int op)
960 324891a5 2006-06-25 devnull USED(dx);
961 324891a5 2006-06-25 devnull USED(grey);
962 324891a5 2006-06-25 devnull USED(op);
963 324891a5 2006-06-25 devnull return bdst;
966 324891a5 2006-06-25 devnull static Buffer
967 324891a5 2006-06-25 devnull alphacalc11(Buffer bdst, Buffer bsrc, Buffer bmask, int dx, int grey, int op)
969 324891a5 2006-06-25 devnull Buffer obdst;
970 324891a5 2006-06-25 devnull int fd, sadelta;
971 324891a5 2006-06-25 devnull int i, sa, ma, q;
972 324891a5 2006-06-25 devnull u32int s, t, u, v;
974 324891a5 2006-06-25 devnull USED(op);
975 324891a5 2006-06-25 devnull obdst = bdst;
976 324891a5 2006-06-25 devnull sadelta = bsrc.alpha == &ones ? 0 : bsrc.delta;
977 324891a5 2006-06-25 devnull q = bsrc.delta == 4 && bdst.delta == 4;
979 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
980 324891a5 2006-06-25 devnull sa = *bsrc.alpha;
981 324891a5 2006-06-25 devnull ma = *bmask.alpha;
982 324891a5 2006-06-25 devnull fd = 255-MUL(sa, ma, t);
984 324891a5 2006-06-25 devnull if(grey){
985 324891a5 2006-06-25 devnull *bdst.grey = MUL(ma, *bsrc.grey, s)+MUL(fd, *bdst.grey, t);
986 324891a5 2006-06-25 devnull bsrc.grey += bsrc.delta;
987 324891a5 2006-06-25 devnull bdst.grey += bdst.delta;
990 324891a5 2006-06-25 devnull *bdst.rgba = MUL0123(ma, *bsrc.rgba, s, t)+MUL0123(fd, *bdst.rgba, u, v);
991 324891a5 2006-06-25 devnull bsrc.rgba++;
992 324891a5 2006-06-25 devnull bdst.rgba++;
993 324891a5 2006-06-25 devnull bsrc.alpha += sadelta;
994 324891a5 2006-06-25 devnull bmask.alpha += bmask.delta;
995 324891a5 2006-06-25 devnull continue;
997 324891a5 2006-06-25 devnull *bdst.red = MUL(ma, *bsrc.red, s)+MUL(fd, *bdst.red, t);
998 324891a5 2006-06-25 devnull *bdst.grn = MUL(ma, *bsrc.grn, s)+MUL(fd, *bdst.grn, t);
999 324891a5 2006-06-25 devnull *bdst.blu = MUL(ma, *bsrc.blu, s)+MUL(fd, *bdst.blu, t);
1000 324891a5 2006-06-25 devnull bsrc.red += bsrc.delta;
1001 324891a5 2006-06-25 devnull bsrc.blu += bsrc.delta;
1002 324891a5 2006-06-25 devnull bsrc.grn += bsrc.delta;
1003 324891a5 2006-06-25 devnull bdst.red += bdst.delta;
1004 324891a5 2006-06-25 devnull bdst.blu += bdst.delta;
1005 324891a5 2006-06-25 devnull bdst.grn += bdst.delta;
1007 324891a5 2006-06-25 devnull if(bdst.alpha != &ones){
1008 324891a5 2006-06-25 devnull *bdst.alpha = MUL(ma, sa, s)+MUL(fd, *bdst.alpha, t);
1009 324891a5 2006-06-25 devnull bdst.alpha += bdst.delta;
1011 324891a5 2006-06-25 devnull bmask.alpha += bmask.delta;
1012 324891a5 2006-06-25 devnull bsrc.alpha += sadelta;
1014 324891a5 2006-06-25 devnull return obdst;
1018 324891a5 2006-06-25 devnull not used yet
1019 324891a5 2006-06-25 devnull source and mask alpha 1
1020 324891a5 2006-06-25 devnull static Buffer
1021 324891a5 2006-06-25 devnull alphacalcS0(Buffer bdst, Buffer bsrc, Buffer bmask, int dx, int grey, int op)
1023 324891a5 2006-06-25 devnull Buffer obdst;
1026 324891a5 2006-06-25 devnull USED(op);
1027 324891a5 2006-06-25 devnull obdst = bdst;
1028 324891a5 2006-06-25 devnull if(bsrc.delta == bdst.delta){
1029 324891a5 2006-06-25 devnull memmove(bdst.rgba, bsrc.rgba, dx*bdst.delta);
1030 324891a5 2006-06-25 devnull return obdst;
1032 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
1033 324891a5 2006-06-25 devnull if(grey){
1034 324891a5 2006-06-25 devnull *bdst.grey = *bsrc.grey;
1035 324891a5 2006-06-25 devnull bsrc.grey += bsrc.delta;
1036 324891a5 2006-06-25 devnull bdst.grey += bdst.delta;
1038 324891a5 2006-06-25 devnull *bdst.red = *bsrc.red;
1039 324891a5 2006-06-25 devnull *bdst.grn = *bsrc.grn;
1040 324891a5 2006-06-25 devnull *bdst.blu = *bsrc.blu;
1041 324891a5 2006-06-25 devnull bsrc.red += bsrc.delta;
1042 324891a5 2006-06-25 devnull bsrc.blu += bsrc.delta;
1043 324891a5 2006-06-25 devnull bsrc.grn += bsrc.delta;
1044 324891a5 2006-06-25 devnull bdst.red += bdst.delta;
1045 324891a5 2006-06-25 devnull bdst.blu += bdst.delta;
1046 324891a5 2006-06-25 devnull bdst.grn += bdst.delta;
1048 324891a5 2006-06-25 devnull if(bdst.alpha != &ones){
1049 324891a5 2006-06-25 devnull *bdst.alpha = 255;
1050 324891a5 2006-06-25 devnull bdst.alpha += bdst.delta;
1053 324891a5 2006-06-25 devnull return obdst;
1057 324891a5 2006-06-25 devnull /* source alpha 1 */
1058 324891a5 2006-06-25 devnull static Buffer
1059 324891a5 2006-06-25 devnull alphacalcS(Buffer bdst, Buffer bsrc, Buffer bmask, int dx, int grey, int op)
1061 324891a5 2006-06-25 devnull Buffer obdst;
1062 324891a5 2006-06-25 devnull int fd;
1063 324891a5 2006-06-25 devnull int i, ma;
1064 324891a5 2006-06-25 devnull u32int s, t;
1066 324891a5 2006-06-25 devnull USED(op);
1067 324891a5 2006-06-25 devnull obdst = bdst;
1069 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
1070 324891a5 2006-06-25 devnull ma = *bmask.alpha;
1071 324891a5 2006-06-25 devnull fd = 255-ma;
1073 324891a5 2006-06-25 devnull if(grey){
1074 324891a5 2006-06-25 devnull *bdst.grey = MUL(ma, *bsrc.grey, s)+MUL(fd, *bdst.grey, t);
1075 324891a5 2006-06-25 devnull bsrc.grey += bsrc.delta;
1076 324891a5 2006-06-25 devnull bdst.grey += bdst.delta;
1078 324891a5 2006-06-25 devnull *bdst.red = MUL(ma, *bsrc.red, s)+MUL(fd, *bdst.red, t);
1079 324891a5 2006-06-25 devnull *bdst.grn = MUL(ma, *bsrc.grn, s)+MUL(fd, *bdst.grn, t);
1080 324891a5 2006-06-25 devnull *bdst.blu = MUL(ma, *bsrc.blu, s)+MUL(fd, *bdst.blu, t);
1081 324891a5 2006-06-25 devnull bsrc.red += bsrc.delta;
1082 324891a5 2006-06-25 devnull bsrc.blu += bsrc.delta;
1083 324891a5 2006-06-25 devnull bsrc.grn += bsrc.delta;
1084 324891a5 2006-06-25 devnull bdst.red += bdst.delta;
1085 324891a5 2006-06-25 devnull bdst.blu += bdst.delta;
1086 324891a5 2006-06-25 devnull bdst.grn += bdst.delta;
1088 324891a5 2006-06-25 devnull if(bdst.alpha != &ones){
1089 324891a5 2006-06-25 devnull *bdst.alpha = ma+MUL(fd, *bdst.alpha, t);
1090 324891a5 2006-06-25 devnull bdst.alpha += bdst.delta;
1092 324891a5 2006-06-25 devnull bmask.alpha += bmask.delta;
1094 324891a5 2006-06-25 devnull return obdst;
1097 324891a5 2006-06-25 devnull static Buffer
1098 324891a5 2006-06-25 devnull boolcalc14(Buffer bdst, Buffer b1, Buffer bmask, int dx, int grey, int op)
1100 324891a5 2006-06-25 devnull Buffer obdst;
1101 324891a5 2006-06-25 devnull int i, ma, zero;
1103 324891a5 2006-06-25 devnull obdst = bdst;
1105 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
1106 324891a5 2006-06-25 devnull ma = *bmask.alpha;
1107 324891a5 2006-06-25 devnull zero = ma ? op == DoutS : op == DinS;
1109 324891a5 2006-06-25 devnull if(grey){
1110 324891a5 2006-06-25 devnull if(zero)
1111 324891a5 2006-06-25 devnull *bdst.grey = 0;
1112 324891a5 2006-06-25 devnull bdst.grey += bdst.delta;
1114 324891a5 2006-06-25 devnull if(zero)
1115 324891a5 2006-06-25 devnull *bdst.red = *bdst.grn = *bdst.blu = 0;
1116 324891a5 2006-06-25 devnull bdst.red += bdst.delta;
1117 324891a5 2006-06-25 devnull bdst.blu += bdst.delta;
1118 324891a5 2006-06-25 devnull bdst.grn += bdst.delta;
1120 324891a5 2006-06-25 devnull bmask.alpha += bmask.delta;
1121 324891a5 2006-06-25 devnull if(bdst.alpha != &ones){
1122 324891a5 2006-06-25 devnull if(zero)
1123 324891a5 2006-06-25 devnull *bdst.alpha = 0;
1124 324891a5 2006-06-25 devnull bdst.alpha += bdst.delta;
1127 324891a5 2006-06-25 devnull return obdst;
1130 324891a5 2006-06-25 devnull static Buffer
1131 324891a5 2006-06-25 devnull boolcalc236789(Buffer bdst, Buffer bsrc, Buffer bmask, int dx, int grey, int op)
1133 324891a5 2006-06-25 devnull Buffer obdst;
1134 324891a5 2006-06-25 devnull int fs, fd;
1135 324891a5 2006-06-25 devnull int i, ma, da, zero;
1136 324891a5 2006-06-25 devnull u32int s, t;
1138 324891a5 2006-06-25 devnull obdst = bdst;
1139 324891a5 2006-06-25 devnull zero = !(op&1);
1141 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
1142 324891a5 2006-06-25 devnull ma = *bmask.alpha;
1143 324891a5 2006-06-25 devnull da = *bdst.alpha;
1144 324891a5 2006-06-25 devnull fs = da;
1145 324891a5 2006-06-25 devnull if(op&2)
1146 324891a5 2006-06-25 devnull fs = 255-da;
1147 324891a5 2006-06-25 devnull fd = 0;
1148 324891a5 2006-06-25 devnull if(op&4)
1149 324891a5 2006-06-25 devnull fd = 255;
1151 324891a5 2006-06-25 devnull if(grey){
1153 324891a5 2006-06-25 devnull *bdst.grey = MUL(fs, *bsrc.grey, s)+MUL(fd, *bdst.grey, t);
1154 324891a5 2006-06-25 devnull else if(zero)
1155 324891a5 2006-06-25 devnull *bdst.grey = 0;
1156 324891a5 2006-06-25 devnull bsrc.grey += bsrc.delta;
1157 324891a5 2006-06-25 devnull bdst.grey += bdst.delta;
1159 324891a5 2006-06-25 devnull if(ma){
1160 324891a5 2006-06-25 devnull *bdst.red = MUL(fs, *bsrc.red, s)+MUL(fd, *bdst.red, t);
1161 324891a5 2006-06-25 devnull *bdst.grn = MUL(fs, *bsrc.grn, s)+MUL(fd, *bdst.grn, t);
1162 324891a5 2006-06-25 devnull *bdst.blu = MUL(fs, *bsrc.blu, s)+MUL(fd, *bdst.blu, t);
1164 324891a5 2006-06-25 devnull else if(zero)
1165 324891a5 2006-06-25 devnull *bdst.red = *bdst.grn = *bdst.blu = 0;
1166 324891a5 2006-06-25 devnull bsrc.red += bsrc.delta;
1167 324891a5 2006-06-25 devnull bsrc.blu += bsrc.delta;
1168 324891a5 2006-06-25 devnull bsrc.grn += bsrc.delta;
1169 324891a5 2006-06-25 devnull bdst.red += bdst.delta;
1170 324891a5 2006-06-25 devnull bdst.blu += bdst.delta;
1171 324891a5 2006-06-25 devnull bdst.grn += bdst.delta;
1173 324891a5 2006-06-25 devnull bmask.alpha += bmask.delta;
1174 324891a5 2006-06-25 devnull if(bdst.alpha != &ones){
1176 324891a5 2006-06-25 devnull *bdst.alpha = fs+MUL(fd, da, t);
1177 324891a5 2006-06-25 devnull else if(zero)
1178 324891a5 2006-06-25 devnull *bdst.alpha = 0;
1179 324891a5 2006-06-25 devnull bdst.alpha += bdst.delta;
1182 324891a5 2006-06-25 devnull return obdst;
1185 324891a5 2006-06-25 devnull static Buffer
1186 324891a5 2006-06-25 devnull boolcalc1011(Buffer bdst, Buffer bsrc, Buffer bmask, int dx, int grey, int op)
1188 324891a5 2006-06-25 devnull Buffer obdst;
1189 324891a5 2006-06-25 devnull int i, ma, zero;
1191 324891a5 2006-06-25 devnull obdst = bdst;
1192 324891a5 2006-06-25 devnull zero = !(op&1);
1194 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
1195 324891a5 2006-06-25 devnull ma = *bmask.alpha;
1197 324891a5 2006-06-25 devnull if(grey){
1199 324891a5 2006-06-25 devnull *bdst.grey = *bsrc.grey;
1200 324891a5 2006-06-25 devnull else if(zero)
1201 324891a5 2006-06-25 devnull *bdst.grey = 0;
1202 324891a5 2006-06-25 devnull bsrc.grey += bsrc.delta;
1203 324891a5 2006-06-25 devnull bdst.grey += bdst.delta;
1205 324891a5 2006-06-25 devnull if(ma){
1206 324891a5 2006-06-25 devnull *bdst.red = *bsrc.red;
1207 324891a5 2006-06-25 devnull *bdst.grn = *bsrc.grn;
1208 324891a5 2006-06-25 devnull *bdst.blu = *bsrc.blu;
1210 324891a5 2006-06-25 devnull else if(zero)
1211 324891a5 2006-06-25 devnull *bdst.red = *bdst.grn = *bdst.blu = 0;
1212 324891a5 2006-06-25 devnull bsrc.red += bsrc.delta;
1213 324891a5 2006-06-25 devnull bsrc.blu += bsrc.delta;
1214 324891a5 2006-06-25 devnull bsrc.grn += bsrc.delta;
1215 324891a5 2006-06-25 devnull bdst.red += bdst.delta;
1216 324891a5 2006-06-25 devnull bdst.blu += bdst.delta;
1217 324891a5 2006-06-25 devnull bdst.grn += bdst.delta;
1219 324891a5 2006-06-25 devnull bmask.alpha += bmask.delta;
1220 324891a5 2006-06-25 devnull if(bdst.alpha != &ones){
1222 324891a5 2006-06-25 devnull *bdst.alpha = 255;
1223 324891a5 2006-06-25 devnull else if(zero)
1224 324891a5 2006-06-25 devnull *bdst.alpha = 0;
1225 324891a5 2006-06-25 devnull bdst.alpha += bdst.delta;
1228 324891a5 2006-06-25 devnull return obdst;
1231 324891a5 2006-06-25 devnull * Replicated cached scan line read. Call the function listed in the Param,
1232 324891a5 2006-06-25 devnull * but cache the result so that for replicated images we only do the work once.
1234 324891a5 2006-06-25 devnull static Buffer
1235 324891a5 2006-06-25 devnull replread(Param *p, uchar *s, int y)
1237 324891a5 2006-06-25 devnull Buffer *b;
1239 324891a5 2006-06-25 devnull USED(s);
1240 324891a5 2006-06-25 devnull b = &p->bcache[y];
1241 324891a5 2006-06-25 devnull if((p->bfilled & (1<<y)) == 0){
1242 324891a5 2006-06-25 devnull p->bfilled |= 1<<y;
1243 324891a5 2006-06-25 devnull *b = p->replcall(p, p->bufbase+y*p->bufdelta, y);
1245 324891a5 2006-06-25 devnull return *b;
1249 324891a5 2006-06-25 devnull * Alpha reading function that simply relabels the grey pointer.
1251 324891a5 2006-06-25 devnull static Buffer
1252 324891a5 2006-06-25 devnull greymaskread(Param *p, uchar *buf, int y)
1254 324891a5 2006-06-25 devnull Buffer b;
1256 324891a5 2006-06-25 devnull b = p->greymaskcall(p, buf, y);
1257 324891a5 2006-06-25 devnull b.alpha = b.grey;
1258 324891a5 2006-06-25 devnull return b;
1261 324891a5 2006-06-25 devnull #define DBG if(0)
1262 324891a5 2006-06-25 devnull static Buffer
1263 324891a5 2006-06-25 devnull readnbit(Param *p, uchar *buf, int y)
1265 324891a5 2006-06-25 devnull Buffer b;
1266 324891a5 2006-06-25 devnull Memimage *img;
1267 324891a5 2006-06-25 devnull uchar *repl, *r, *w, *ow, bits;
1268 324891a5 2006-06-25 devnull int i, n, sh, depth, x, dx, npack, nbits;
1270 324891a5 2006-06-25 devnull memset(&b, 0, sizeof b);
1271 324891a5 2006-06-25 devnull b.rgba = (u32int*)buf;
1272 324891a5 2006-06-25 devnull b.grey = w = buf;
1273 324891a5 2006-06-25 devnull b.red = b.blu = b.grn = w;
1274 324891a5 2006-06-25 devnull b.alpha = &ones;
1275 324891a5 2006-06-25 devnull b.delta = 1;
1277 324891a5 2006-06-25 devnull dx = p->dx;
1278 324891a5 2006-06-25 devnull img = p->img;
1279 324891a5 2006-06-25 devnull depth = img->depth;
1280 324891a5 2006-06-25 devnull repl = &replbit[depth][0];
1281 324891a5 2006-06-25 devnull npack = 8/depth;
1282 324891a5 2006-06-25 devnull sh = 8-depth;
1284 324891a5 2006-06-25 devnull /* copy from p->r.min.x until end of repl rectangle */
1285 324891a5 2006-06-25 devnull x = p->r.min.x;
1286 324891a5 2006-06-25 devnull n = dx;
1287 324891a5 2006-06-25 devnull if(n > p->img->r.max.x - x)
1288 324891a5 2006-06-25 devnull n = p->img->r.max.x - x;
1290 324891a5 2006-06-25 devnull r = p->bytermin + y*p->bwidth;
1291 324891a5 2006-06-25 devnull DBG print("readnbit dx %d %p=%p+%d*%d, *r=%d fetch %d ", dx, r, p->bytermin, y, p->bwidth, *r, n);
1292 324891a5 2006-06-25 devnull bits = *r++;
1293 324891a5 2006-06-25 devnull nbits = 8;
1294 324891a5 2006-06-25 devnull if(i=x&(npack-1)){
1295 324891a5 2006-06-25 devnull DBG print("throwaway %d...", i);
1296 324891a5 2006-06-25 devnull bits <<= depth*i;
1297 324891a5 2006-06-25 devnull nbits -= depth*i;
1299 324891a5 2006-06-25 devnull for(i=0; i<n; i++){
1300 324891a5 2006-06-25 devnull if(nbits == 0){
1301 324891a5 2006-06-25 devnull DBG print("(%.2ux)...", *r);
1302 324891a5 2006-06-25 devnull bits = *r++;
1303 324891a5 2006-06-25 devnull nbits = 8;
1305 324891a5 2006-06-25 devnull *w++ = repl[bits>>sh];
1306 324891a5 2006-06-25 devnull DBG print("bit %x...", repl[bits>>sh]);
1307 324891a5 2006-06-25 devnull bits <<= depth;
1308 324891a5 2006-06-25 devnull nbits -= depth;
1310 324891a5 2006-06-25 devnull dx -= n;
1311 324891a5 2006-06-25 devnull if(dx == 0)
1312 324891a5 2006-06-25 devnull return b;
1314 324891a5 2006-06-25 devnull assert(x+i == p->img->r.max.x);
1316 324891a5 2006-06-25 devnull /* copy from beginning of repl rectangle until where we were before. */
1317 324891a5 2006-06-25 devnull x = p->img->r.min.x;
1318 324891a5 2006-06-25 devnull n = dx;
1319 324891a5 2006-06-25 devnull if(n > p->r.min.x - x)
1320 324891a5 2006-06-25 devnull n = p->r.min.x - x;
1322 324891a5 2006-06-25 devnull r = p->bytey0s + y*p->bwidth;
1323 324891a5 2006-06-25 devnull DBG print("x=%d r=%p...", x, r);
1324 324891a5 2006-06-25 devnull bits = *r++;
1325 324891a5 2006-06-25 devnull nbits = 8;
1326 324891a5 2006-06-25 devnull if(i=x&(npack-1)){
1327 324891a5 2006-06-25 devnull bits <<= depth*i;
1328 324891a5 2006-06-25 devnull nbits -= depth*i;
1330 324891a5 2006-06-25 devnull DBG print("nbits=%d...", nbits);
1331 324891a5 2006-06-25 devnull for(i=0; i<n; i++){
1332 324891a5 2006-06-25 devnull if(nbits == 0){
1333 324891a5 2006-06-25 devnull bits = *r++;
1334 324891a5 2006-06-25 devnull nbits = 8;
1336 324891a5 2006-06-25 devnull *w++ = repl[bits>>sh];
1337 324891a5 2006-06-25 devnull DBG print("bit %x...", repl[bits>>sh]);
1338 324891a5 2006-06-25 devnull bits <<= depth;
1339 324891a5 2006-06-25 devnull nbits -= depth;
1340 324891a5 2006-06-25 devnull DBG print("bits %x nbits %d...", bits, nbits);
1342 324891a5 2006-06-25 devnull dx -= n;
1343 324891a5 2006-06-25 devnull if(dx == 0)
1344 324891a5 2006-06-25 devnull return b;
1346 324891a5 2006-06-25 devnull assert(dx > 0);
1347 324891a5 2006-06-25 devnull /* now we have exactly one full scan line: just replicate the buffer itself until we are done */
1348 324891a5 2006-06-25 devnull ow = buf;
1349 324891a5 2006-06-25 devnull while(dx--)
1350 324891a5 2006-06-25 devnull *w++ = *ow++;
1352 324891a5 2006-06-25 devnull return b;
1354 324891a5 2006-06-25 devnull #undef DBG
1356 324891a5 2006-06-25 devnull #define DBG if(0)
1357 324891a5 2006-06-25 devnull static void
1358 324891a5 2006-06-25 devnull writenbit(Param *p, uchar *w, Buffer src)
1360 324891a5 2006-06-25 devnull uchar *r;
1361 324891a5 2006-06-25 devnull u32int bits;
1362 324891a5 2006-06-25 devnull int i, sh, depth, npack, nbits, x, ex;
1364 324891a5 2006-06-25 devnull assert(src.grey != nil && src.delta == 1);
1366 324891a5 2006-06-25 devnull x = p->r.min.x;
1367 324891a5 2006-06-25 devnull ex = x+p->dx;
1368 324891a5 2006-06-25 devnull depth = p->img->depth;
1369 324891a5 2006-06-25 devnull npack = 8/depth;
1371 324891a5 2006-06-25 devnull i=x&(npack-1);
1372 324891a5 2006-06-25 devnull bits = i ? (*w >> (8-depth*i)) : 0;
1373 324891a5 2006-06-25 devnull nbits = depth*i;
1374 324891a5 2006-06-25 devnull sh = 8-depth;
1375 324891a5 2006-06-25 devnull r = src.grey;
1377 324891a5 2006-06-25 devnull for(; x<ex; x++){
1378 324891a5 2006-06-25 devnull bits <<= depth;
1379 324891a5 2006-06-25 devnull DBG print(" %x", *r);
1380 324891a5 2006-06-25 devnull bits |= (*r++ >> sh);
1381 324891a5 2006-06-25 devnull nbits += depth;
1382 324891a5 2006-06-25 devnull if(nbits == 8){
1383 324891a5 2006-06-25 devnull *w++ = bits;
1384 324891a5 2006-06-25 devnull nbits = 0;
1388 324891a5 2006-06-25 devnull if(nbits){
1389 324891a5 2006-06-25 devnull sh = 8-nbits;
1390 324891a5 2006-06-25 devnull bits <<= sh;
1391 324891a5 2006-06-25 devnull bits |= *w & ((1<<sh)-1);
1392 324891a5 2006-06-25 devnull *w = bits;
1394 324891a5 2006-06-25 devnull DBG print("\n");
1395 324891a5 2006-06-25 devnull return;
1397 324891a5 2006-06-25 devnull #undef DBG
1399 324891a5 2006-06-25 devnull static Buffer
1400 324891a5 2006-06-25 devnull readcmap(Param *p, uchar *buf, int y)
1402 324891a5 2006-06-25 devnull Buffer b;
1403 324891a5 2006-06-25 devnull int a, convgrey, copyalpha, dx, i, m;
1404 324891a5 2006-06-25 devnull uchar *q, *cmap, *begin, *end, *r, *w;
1406 324891a5 2006-06-25 devnull memset(&b, 0, sizeof b);
1407 324891a5 2006-06-25 devnull begin = p->bytey0s + y*p->bwidth;
1408 324891a5 2006-06-25 devnull r = p->bytermin + y*p->bwidth;
1409 324891a5 2006-06-25 devnull end = p->bytey0e + y*p->bwidth;
1410 324891a5 2006-06-25 devnull cmap = p->img->cmap->cmap2rgb;
1411 324891a5 2006-06-25 devnull convgrey = p->convgrey;
1412 324891a5 2006-06-25 devnull copyalpha = (p->img->flags&Falpha) ? 1 : 0;
1414 324891a5 2006-06-25 devnull w = buf;
1415 324891a5 2006-06-25 devnull dx = p->dx;
1416 324891a5 2006-06-25 devnull if(copyalpha){
1417 324891a5 2006-06-25 devnull b.alpha = buf++;
1418 324891a5 2006-06-25 devnull a = p->img->shift[CAlpha]/8;
1419 324891a5 2006-06-25 devnull m = p->img->shift[CMap]/8;
1420 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
1421 324891a5 2006-06-25 devnull *w++ = r[a];
1422 324891a5 2006-06-25 devnull q = cmap+r[m]*3;
1423 324891a5 2006-06-25 devnull r += 2;
1424 324891a5 2006-06-25 devnull if(r == end)
1425 324891a5 2006-06-25 devnull r = begin;
1426 324891a5 2006-06-25 devnull if(convgrey){
1427 324891a5 2006-06-25 devnull *w++ = RGB2K(q[0], q[1], q[2]);
1429 324891a5 2006-06-25 devnull *w++ = q[2]; /* blue */
1430 324891a5 2006-06-25 devnull *w++ = q[1]; /* green */
1431 324891a5 2006-06-25 devnull *w++ = q[0]; /* red */
1435 324891a5 2006-06-25 devnull b.alpha = &ones;
1436 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
1437 324891a5 2006-06-25 devnull q = cmap+*r++*3;
1438 324891a5 2006-06-25 devnull if(r == end)
1439 324891a5 2006-06-25 devnull r = begin;
1440 324891a5 2006-06-25 devnull if(convgrey){
1441 324891a5 2006-06-25 devnull *w++ = RGB2K(q[0], q[1], q[2]);
1443 324891a5 2006-06-25 devnull *w++ = q[2]; /* blue */
1444 324891a5 2006-06-25 devnull *w++ = q[1]; /* green */
1445 324891a5 2006-06-25 devnull *w++ = q[0]; /* red */
1450 324891a5 2006-06-25 devnull b.rgba = (u32int*)(buf-copyalpha);
1452 324891a5 2006-06-25 devnull if(convgrey){
1453 324891a5 2006-06-25 devnull b.grey = buf;
1454 324891a5 2006-06-25 devnull b.red = b.blu = b.grn = buf;
1455 324891a5 2006-06-25 devnull b.delta = 1+copyalpha;
1457 324891a5 2006-06-25 devnull b.blu = buf;
1458 324891a5 2006-06-25 devnull b.grn = buf+1;
1459 324891a5 2006-06-25 devnull b.red = buf+2;
1460 324891a5 2006-06-25 devnull b.grey = nil;
1461 324891a5 2006-06-25 devnull b.delta = 3+copyalpha;
1463 324891a5 2006-06-25 devnull return b;
1466 324891a5 2006-06-25 devnull static void
1467 324891a5 2006-06-25 devnull writecmap(Param *p, uchar *w, Buffer src)
1469 324891a5 2006-06-25 devnull uchar *cmap, *red, *grn, *blu;
1470 324891a5 2006-06-25 devnull int i, dx, delta;
1472 324891a5 2006-06-25 devnull cmap = p->img->cmap->rgb2cmap;
1474 324891a5 2006-06-25 devnull delta = src.delta;
1475 324891a5 2006-06-25 devnull red= src.red;
1476 324891a5 2006-06-25 devnull grn = src.grn;
1477 324891a5 2006-06-25 devnull blu = src.blu;
1479 324891a5 2006-06-25 devnull dx = p->dx;
1480 324891a5 2006-06-25 devnull for(i=0; i<dx; i++, red+=delta, grn+=delta, blu+=delta)
1481 324891a5 2006-06-25 devnull *w++ = cmap[(*red>>4)*256+(*grn>>4)*16+(*blu>>4)];
1484 324891a5 2006-06-25 devnull #define DBG if(drawdebug)
1485 324891a5 2006-06-25 devnull static Buffer
1486 324891a5 2006-06-25 devnull readbyte(Param *p, uchar *buf, int y)
1488 324891a5 2006-06-25 devnull Buffer b;
1489 324891a5 2006-06-25 devnull Memimage *img;
1490 324891a5 2006-06-25 devnull int dx, isgrey, convgrey, alphaonly, copyalpha, i, nb;
1491 324891a5 2006-06-25 devnull uchar *begin, *end, *r, *w, *rrepl, *grepl, *brepl, *arepl, *krepl;
1492 324891a5 2006-06-25 devnull uchar ured, ugrn, ublu;
1493 324891a5 2006-06-25 devnull u32int u;
1495 324891a5 2006-06-25 devnull img = p->img;
1496 324891a5 2006-06-25 devnull begin = p->bytey0s + y*p->bwidth;
1497 324891a5 2006-06-25 devnull r = p->bytermin + y*p->bwidth;
1498 324891a5 2006-06-25 devnull end = p->bytey0e + y*p->bwidth;
1500 324891a5 2006-06-25 devnull w = buf;
1501 324891a5 2006-06-25 devnull dx = p->dx;
1502 324891a5 2006-06-25 devnull nb = img->depth/8;
1504 324891a5 2006-06-25 devnull convgrey = p->convgrey; /* convert rgb to grey */
1505 324891a5 2006-06-25 devnull isgrey = img->flags&Fgrey;
1506 324891a5 2006-06-25 devnull alphaonly = p->alphaonly;
1507 324891a5 2006-06-25 devnull copyalpha = (img->flags&Falpha) ? 1 : 0;
1509 324891a5 2006-06-25 devnull /* if we can, avoid processing everything */
1510 324891a5 2006-06-25 devnull if(!(img->flags&Frepl) && !convgrey && (img->flags&Fbytes)){
1511 324891a5 2006-06-25 devnull memset(&b, 0, sizeof b);
1512 324891a5 2006-06-25 devnull if(p->needbuf){
1513 324891a5 2006-06-25 devnull memmove(buf, r, dx*nb);
1514 324891a5 2006-06-25 devnull r = buf;
1516 324891a5 2006-06-25 devnull b.rgba = (u32int*)r;
1517 324891a5 2006-06-25 devnull if(copyalpha)
1518 324891a5 2006-06-25 devnull b.alpha = r+img->shift[CAlpha]/8;
1520 324891a5 2006-06-25 devnull b.alpha = &ones;
1521 324891a5 2006-06-25 devnull if(isgrey){
1522 324891a5 2006-06-25 devnull b.grey = r+img->shift[CGrey]/8;
1523 324891a5 2006-06-25 devnull b.red = b.grn = b.blu = b.grey;
1525 324891a5 2006-06-25 devnull b.red = r+img->shift[CRed]/8;
1526 324891a5 2006-06-25 devnull b.grn = r+img->shift[CGreen]/8;
1527 324891a5 2006-06-25 devnull b.blu = r+img->shift[CBlue]/8;
1529 324891a5 2006-06-25 devnull b.delta = nb;
1530 324891a5 2006-06-25 devnull return b;
1533 324891a5 2006-06-25 devnull rrepl = replbit[img->nbits[CRed]];
1534 324891a5 2006-06-25 devnull grepl = replbit[img->nbits[CGreen]];
1535 324891a5 2006-06-25 devnull brepl = replbit[img->nbits[CBlue]];
1536 324891a5 2006-06-25 devnull arepl = replbit[img->nbits[CAlpha]];
1537 324891a5 2006-06-25 devnull krepl = replbit[img->nbits[CGrey]];
1539 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
1540 324891a5 2006-06-25 devnull u = r[0] | (r[1]<<8) | (r[2]<<16) | (r[3]<<24);
1541 324891a5 2006-06-25 devnull if(copyalpha)
1542 324891a5 2006-06-25 devnull *w++ = arepl[(u>>img->shift[CAlpha]) & img->mask[CAlpha]];
1544 324891a5 2006-06-25 devnull if(isgrey)
1545 324891a5 2006-06-25 devnull *w++ = krepl[(u >> img->shift[CGrey]) & img->mask[CGrey]];
1546 324891a5 2006-06-25 devnull else if(!alphaonly){
1547 324891a5 2006-06-25 devnull ured = rrepl[(u >> img->shift[CRed]) & img->mask[CRed]];
1548 324891a5 2006-06-25 devnull ugrn = grepl[(u >> img->shift[CGreen]) & img->mask[CGreen]];
1549 324891a5 2006-06-25 devnull ublu = brepl[(u >> img->shift[CBlue]) & img->mask[CBlue]];
1550 324891a5 2006-06-25 devnull if(convgrey){
1551 324891a5 2006-06-25 devnull *w++ = RGB2K(ured, ugrn, ublu);
1553 324891a5 2006-06-25 devnull *w++ = brepl[(u >> img->shift[CBlue]) & img->mask[CBlue]];
1554 324891a5 2006-06-25 devnull *w++ = grepl[(u >> img->shift[CGreen]) & img->mask[CGreen]];
1555 324891a5 2006-06-25 devnull *w++ = rrepl[(u >> img->shift[CRed]) & img->mask[CRed]];
1558 324891a5 2006-06-25 devnull r += nb;
1559 324891a5 2006-06-25 devnull if(r == end)
1560 324891a5 2006-06-25 devnull r = begin;
1563 324891a5 2006-06-25 devnull b.alpha = copyalpha ? buf : &ones;
1564 324891a5 2006-06-25 devnull b.rgba = (u32int*)buf;
1565 324891a5 2006-06-25 devnull if(alphaonly){
1566 324891a5 2006-06-25 devnull b.red = b.grn = b.blu = b.grey = nil;
1567 324891a5 2006-06-25 devnull if(!copyalpha)
1568 324891a5 2006-06-25 devnull b.rgba = nil;
1569 324891a5 2006-06-25 devnull b.delta = 1;
1570 324891a5 2006-06-25 devnull }else if(isgrey || convgrey){
1571 324891a5 2006-06-25 devnull b.grey = buf+copyalpha;
1572 324891a5 2006-06-25 devnull b.red = b.grn = b.blu = buf+copyalpha;
1573 324891a5 2006-06-25 devnull b.delta = copyalpha+1;
1575 324891a5 2006-06-25 devnull b.blu = buf+copyalpha;
1576 324891a5 2006-06-25 devnull b.grn = buf+copyalpha+1;
1577 324891a5 2006-06-25 devnull b.grey = nil;
1578 324891a5 2006-06-25 devnull b.red = buf+copyalpha+2;
1579 324891a5 2006-06-25 devnull b.delta = copyalpha+3;
1581 324891a5 2006-06-25 devnull return b;
1583 324891a5 2006-06-25 devnull #undef DBG
1585 324891a5 2006-06-25 devnull #define DBG if(drawdebug)
1586 324891a5 2006-06-25 devnull static void
1587 324891a5 2006-06-25 devnull writebyte(Param *p, uchar *w, Buffer src)
1589 324891a5 2006-06-25 devnull Memimage *img;
1590 324891a5 2006-06-25 devnull int i, isalpha, isgrey, nb, delta, dx, adelta;
1591 324891a5 2006-06-25 devnull uchar ff, *red, *grn, *blu, *grey, *alpha;
1592 324891a5 2006-06-25 devnull u32int u, mask;
1594 324891a5 2006-06-25 devnull img = p->img;
1596 324891a5 2006-06-25 devnull red = src.red;
1597 324891a5 2006-06-25 devnull grn = src.grn;
1598 324891a5 2006-06-25 devnull blu = src.blu;
1599 324891a5 2006-06-25 devnull alpha = src.alpha;
1600 324891a5 2006-06-25 devnull delta = src.delta;
1601 324891a5 2006-06-25 devnull grey = src.grey;
1602 324891a5 2006-06-25 devnull dx = p->dx;
1604 324891a5 2006-06-25 devnull nb = img->depth/8;
1605 324891a5 2006-06-25 devnull mask = (nb==4) ? 0 : ~((1<<img->depth)-1);
1607 324891a5 2006-06-25 devnull isalpha = img->flags&Falpha;
1608 324891a5 2006-06-25 devnull isgrey = img->flags&Fgrey;
1609 324891a5 2006-06-25 devnull adelta = src.delta;
1611 324891a5 2006-06-25 devnull if(isalpha && (alpha == nil || alpha == &ones)){
1612 324891a5 2006-06-25 devnull ff = 0xFF;
1613 324891a5 2006-06-25 devnull alpha = &ff;
1614 324891a5 2006-06-25 devnull adelta = 0;
1617 324891a5 2006-06-25 devnull for(i=0; i<dx; i++){
1618 324891a5 2006-06-25 devnull u = w[0] | (w[1]<<8) | (w[2]<<16) | (w[3]<<24);
1619 324891a5 2006-06-25 devnull DBG print("u %.8lux...", u);
1620 324891a5 2006-06-25 devnull u &= mask;
1621 324891a5 2006-06-25 devnull DBG print("&mask %.8lux...", u);
1622 324891a5 2006-06-25 devnull if(isgrey){
1623 324891a5 2006-06-25 devnull u |= ((*grey >> (8-img->nbits[CGrey])) & img->mask[CGrey]) << img->shift[CGrey];
1624 324891a5 2006-06-25 devnull DBG print("|grey %.8lux...", u);
1625 324891a5 2006-06-25 devnull grey += delta;
1627 324891a5 2006-06-25 devnull u |= ((*red >> (8-img->nbits[CRed])) & img->mask[CRed]) << img->shift[CRed];
1628 324891a5 2006-06-25 devnull u |= ((*grn >> (8-img->nbits[CGreen])) & img->mask[CGreen]) << img->shift[CGreen];
1629 324891a5 2006-06-25 devnull u |= ((*blu >> (8-img->nbits[CBlue])) & img->mask[CBlue]) << img->shift[CBlue];
1630 324891a5 2006-06-25 devnull red += delta;
1631 324891a5 2006-06-25 devnull grn += delta;
1632 324891a5 2006-06-25 devnull blu += delta;
1633 324891a5 2006-06-25 devnull DBG print("|rgb %.8lux...", u);
1636 324891a5 2006-06-25 devnull if(isalpha){
1637 324891a5 2006-06-25 devnull u |= ((*alpha >> (8-img->nbits[CAlpha])) & img->mask[CAlpha]) << img->shift[CAlpha];
1638 324891a5 2006-06-25 devnull alpha += adelta;
1639 324891a5 2006-06-25 devnull DBG print("|alpha %.8lux...", u);
1642 324891a5 2006-06-25 devnull w[0] = u;
1643 324891a5 2006-06-25 devnull w[1] = u>>8;
1644 324891a5 2006-06-25 devnull w[2] = u>>16;
1645 324891a5 2006-06-25 devnull w[3] = u>>24;
1646 324891a5 2006-06-25 devnull DBG print("write back %.8lux...", u);
1647 324891a5 2006-06-25 devnull w += nb;
1650 324891a5 2006-06-25 devnull #undef DBG
1652 324891a5 2006-06-25 devnull static Readfn*
1653 324891a5 2006-06-25 devnull readfn(Memimage *img)
1655 324891a5 2006-06-25 devnull if(img->depth < 8)
1656 324891a5 2006-06-25 devnull return readnbit;
1657 324891a5 2006-06-25 devnull if(img->nbits[CMap] == 8)
1658 324891a5 2006-06-25 devnull return readcmap;
1659 324891a5 2006-06-25 devnull return readbyte;
1662 324891a5 2006-06-25 devnull static Readfn*
1663 324891a5 2006-06-25 devnull readalphafn(Memimage *m)
1665 324891a5 2006-06-25 devnull USED(m);
1666 324891a5 2006-06-25 devnull return readbyte;
1669 324891a5 2006-06-25 devnull static Writefn*
1670 324891a5 2006-06-25 devnull writefn(Memimage *img)
1672 324891a5 2006-06-25 devnull if(img->depth < 8)
1673 324891a5 2006-06-25 devnull return writenbit;
1674 324891a5 2006-06-25 devnull if(img->chan == CMAP8)
1675 324891a5 2006-06-25 devnull return writecmap;
1676 324891a5 2006-06-25 devnull return writebyte;
1679 324891a5 2006-06-25 devnull static void
1680 324891a5 2006-06-25 devnull nullwrite(Param *p, uchar *s, Buffer b)
1682 324891a5 2006-06-25 devnull USED(p);
1683 324891a5 2006-06-25 devnull USED(s);
1686 324891a5 2006-06-25 devnull static Buffer
1687 324891a5 2006-06-25 devnull readptr(Param *p, uchar *s, int y)
1689 324891a5 2006-06-25 devnull Buffer b;
1690 324891a5 2006-06-25 devnull uchar *q;
1692 324891a5 2006-06-25 devnull USED(s);
1693 324891a5 2006-06-25 devnull memset(&b, 0, sizeof b);
1694 324891a5 2006-06-25 devnull q = p->bytermin + y*p->bwidth;
1695 324891a5 2006-06-25 devnull b.red = q; /* ptr to data */
1696 324891a5 2006-06-25 devnull b.grn = b.blu = b.grey = b.alpha = nil;
1697 324891a5 2006-06-25 devnull b.rgba = (u32int*)q;
1698 324891a5 2006-06-25 devnull b.delta = p->img->depth/8;
1699 324891a5 2006-06-25 devnull return b;
1702 324891a5 2006-06-25 devnull static Buffer
1703 324891a5 2006-06-25 devnull boolmemmove(Buffer bdst, Buffer bsrc, Buffer b1, int dx, int i, int o)
1705 324891a5 2006-06-25 devnull USED(i);
1706 324891a5 2006-06-25 devnull USED(o);
1707 324891a5 2006-06-25 devnull memmove(bdst.red, bsrc.red, dx*bdst.delta);
1708 324891a5 2006-06-25 devnull return bdst;
1711 324891a5 2006-06-25 devnull static Buffer
1712 324891a5 2006-06-25 devnull boolcopy8(Buffer bdst, Buffer bsrc, Buffer bmask, int dx, int i, int o)
1714 324891a5 2006-06-25 devnull uchar *m, *r, *w, *ew;
1716 324891a5 2006-06-25 devnull USED(i);
1717 324891a5 2006-06-25 devnull USED(o);
1718 324891a5 2006-06-25 devnull m = bmask.grey;
1719 324891a5 2006-06-25 devnull w = bdst.red;
1720 324891a5 2006-06-25 devnull r = bsrc.red;
1721 324891a5 2006-06-25 devnull ew = w+dx;
1722 324891a5 2006-06-25 devnull for(; w < ew; w++,r++)
1723 324891a5 2006-06-25 devnull if(*m++)
1724 324891a5 2006-06-25 devnull *w = *r;
1725 324891a5 2006-06-25 devnull return bdst; /* not used */
1728 324891a5 2006-06-25 devnull static Buffer
1729 324891a5 2006-06-25 devnull boolcopy16(Buffer bdst, Buffer bsrc, Buffer bmask, int dx, int i, int o)
1731 324891a5 2006-06-25 devnull uchar *m;
1732 324891a5 2006-06-25 devnull ushort *r, *w, *ew;
1734 324891a5 2006-06-25 devnull USED(i);
1735 324891a5 2006-06-25 devnull USED(o);
1736 324891a5 2006-06-25 devnull m = bmask.grey;
1737 324891a5 2006-06-25 devnull w = (ushort*)bdst.red;
1738 324891a5 2006-06-25 devnull r = (ushort*)bsrc.red;
1739 324891a5 2006-06-25 devnull ew = w+dx;
1740 324891a5 2006-06-25 devnull for(; w < ew; w++,r++)
1741 324891a5 2006-06-25 devnull if(*m++)
1742 324891a5 2006-06-25 devnull *w = *r;
1743 324891a5 2006-06-25 devnull return bdst; /* not used */
1746 324891a5 2006-06-25 devnull static Buffer
1747 324891a5 2006-06-25 devnull boolcopy24(Buffer bdst, Buffer bsrc, Buffer bmask, int dx, int i, int o)
1749 324891a5 2006-06-25 devnull uchar *m;
1750 324891a5 2006-06-25 devnull uchar *r, *w, *ew;
1752 324891a5 2006-06-25 devnull USED(i);
1753 324891a5 2006-06-25 devnull USED(o);
1754 324891a5 2006-06-25 devnull m = bmask.grey;
1755 324891a5 2006-06-25 devnull w = bdst.red;
1756 324891a5 2006-06-25 devnull r = bsrc.red;
1757 324891a5 2006-06-25 devnull ew = w+dx*3;
1758 324891a5 2006-06-25 devnull while(w < ew){
1759 324891a5 2006-06-25 devnull if(*m++){
1760 324891a5 2006-06-25 devnull *w++ = *r++;
1761 324891a5 2006-06-25 devnull *w++ = *r++;
1762 324891a5 2006-06-25 devnull *w++ = *r++;
1764 324891a5 2006-06-25 devnull w += 3;
1765 324891a5 2006-06-25 devnull r += 3;
1768 324891a5 2006-06-25 devnull return bdst; /* not used */
1771 324891a5 2006-06-25 devnull static Buffer
1772 324891a5 2006-06-25 devnull boolcopy32(Buffer bdst, Buffer bsrc, Buffer bmask, int dx, int i, int o)
1774 324891a5 2006-06-25 devnull uchar *m;
1775 324891a5 2006-06-25 devnull u32int *r, *w, *ew;
1777 324891a5 2006-06-25 devnull USED(i);
1778 324891a5 2006-06-25 devnull USED(o);
1779 324891a5 2006-06-25 devnull m = bmask.grey;
1780 324891a5 2006-06-25 devnull w = (u32int*)bdst.red;
1781 324891a5 2006-06-25 devnull r = (u32int*)bsrc.red;
1782 324891a5 2006-06-25 devnull ew = w+dx;
1783 324891a5 2006-06-25 devnull for(; w < ew; w++,r++)
1784 324891a5 2006-06-25 devnull if(*m++)
1785 324891a5 2006-06-25 devnull *w = *r;
1786 324891a5 2006-06-25 devnull return bdst; /* not used */
1789 324891a5 2006-06-25 devnull static Buffer
1790 324891a5 2006-06-25 devnull genconv(Param *p, uchar *buf, int y)
1792 324891a5 2006-06-25 devnull Buffer b;
1793 324891a5 2006-06-25 devnull int nb;
1794 324891a5 2006-06-25 devnull uchar *r, *w, *ew;
1796 324891a5 2006-06-25 devnull /* read from source into RGB format in convbuf */
1797 324891a5 2006-06-25 devnull b = p->convreadcall(p, p->convbuf, y);
1799 324891a5 2006-06-25 devnull /* write RGB format into dst format in buf */
1800 324891a5 2006-06-25 devnull p->convwritecall(p->convdpar, buf, b);
1802 324891a5 2006-06-25 devnull if(p->convdx){
1803 324891a5 2006-06-25 devnull nb = p->convdpar->img->depth/8;
1804 324891a5 2006-06-25 devnull r = buf;
1805 324891a5 2006-06-25 devnull w = buf+nb*p->dx;
1806 324891a5 2006-06-25 devnull ew = buf+nb*p->convdx;
1807 324891a5 2006-06-25 devnull while(w<ew)
1808 324891a5 2006-06-25 devnull *w++ = *r++;
1811 324891a5 2006-06-25 devnull b.red = buf;
1812 324891a5 2006-06-25 devnull b.blu = b.grn = b.grey = b.alpha = nil;
1813 324891a5 2006-06-25 devnull b.rgba = (u32int*)buf;
1814 324891a5 2006-06-25 devnull b.delta = 0;
1816 324891a5 2006-06-25 devnull return b;
1819 324891a5 2006-06-25 devnull static Readfn*
1820 324891a5 2006-06-25 devnull convfn(Memimage *dst, Param *dpar, Memimage *src, Param *spar)
1822 324891a5 2006-06-25 devnull if(dst->chan == src->chan && !(src->flags&Frepl)){
1823 324891a5 2006-06-25 devnull /*if(drawdebug) iprint("readptr..."); */
1824 324891a5 2006-06-25 devnull return readptr;
1827 324891a5 2006-06-25 devnull if(dst->chan==CMAP8 && (src->chan==GREY1||src->chan==GREY2||src->chan==GREY4)){
1828 324891a5 2006-06-25 devnull /* cheat because we know the replicated value is exactly the color map entry. */
1829 324891a5 2006-06-25 devnull /*if(drawdebug) iprint("Readnbit..."); */
1830 324891a5 2006-06-25 devnull return readnbit;
1833 324891a5 2006-06-25 devnull spar->convreadcall = readfn(src);
1834 324891a5 2006-06-25 devnull spar->convwritecall = writefn(dst);
1835 324891a5 2006-06-25 devnull spar->convdpar = dpar;
1837 324891a5 2006-06-25 devnull /* allocate a conversion buffer */
1838 324891a5 2006-06-25 devnull spar->convbufoff = ndrawbuf;
1839 324891a5 2006-06-25 devnull ndrawbuf += spar->dx*4;
1841 324891a5 2006-06-25 devnull if(spar->dx > Dx(spar->img->r)){
1842 324891a5 2006-06-25 devnull spar->convdx = spar->dx;
1843 324891a5 2006-06-25 devnull spar->dx = Dx(spar->img->r);
1846 324891a5 2006-06-25 devnull /*if(drawdebug) iprint("genconv..."); */
1847 324891a5 2006-06-25 devnull return genconv;
1851 324891a5 2006-06-25 devnull * Do NOT call this directly. pixelbits is a wrapper
1852 324891a5 2006-06-25 devnull * around this that fetches the bits from the X server
1853 324891a5 2006-06-25 devnull * when necessary.
1856 324891a5 2006-06-25 devnull _pixelbits(Memimage *i, Point pt)
1858 324891a5 2006-06-25 devnull uchar *p;
1859 324891a5 2006-06-25 devnull u32int val;
1860 324891a5 2006-06-25 devnull int off, bpp, npack;
1862 324891a5 2006-06-25 devnull val = 0;
1863 324891a5 2006-06-25 devnull p = byteaddr(i, pt);
1864 324891a5 2006-06-25 devnull switch(bpp=i->depth){
1865 324891a5 2006-06-25 devnull case 1:
1866 324891a5 2006-06-25 devnull case 2:
1867 324891a5 2006-06-25 devnull case 4:
1868 324891a5 2006-06-25 devnull npack = 8/bpp;
1869 324891a5 2006-06-25 devnull off = pt.x%npack;
1870 324891a5 2006-06-25 devnull val = p[0] >> bpp*(npack-1-off);
1871 324891a5 2006-06-25 devnull val &= (1<<bpp)-1;
1873 324891a5 2006-06-25 devnull case 8:
1874 324891a5 2006-06-25 devnull val = p[0];
1876 324891a5 2006-06-25 devnull case 16:
1877 324891a5 2006-06-25 devnull val = p[0]|(p[1]<<8);
1879 324891a5 2006-06-25 devnull case 24:
1880 324891a5 2006-06-25 devnull val = p[0]|(p[1]<<8)|(p[2]<<16);
1882 324891a5 2006-06-25 devnull case 32:
1883 324891a5 2006-06-25 devnull val = p[0]|(p[1]<<8)|(p[2]<<16)|(p[3]<<24);
1886 324891a5 2006-06-25 devnull while(bpp<32){
1887 324891a5 2006-06-25 devnull val |= val<<bpp;
1888 324891a5 2006-06-25 devnull bpp *= 2;
1890 324891a5 2006-06-25 devnull return val;
1893 324891a5 2006-06-25 devnull static Calcfn*
1894 324891a5 2006-06-25 devnull boolcopyfn(Memimage *img, Memimage *mask)
1896 324891a5 2006-06-25 devnull if(mask->flags&Frepl && Dx(mask->r)==1 && Dy(mask->r)==1 && pixelbits(mask, mask->r.min)==~0)
1897 324891a5 2006-06-25 devnull return boolmemmove;
1899 324891a5 2006-06-25 devnull switch(img->depth){
1900 324891a5 2006-06-25 devnull case 8:
1901 324891a5 2006-06-25 devnull return boolcopy8;
1902 324891a5 2006-06-25 devnull case 16:
1903 324891a5 2006-06-25 devnull return boolcopy16;
1904 324891a5 2006-06-25 devnull case 24:
1905 324891a5 2006-06-25 devnull return boolcopy24;
1906 324891a5 2006-06-25 devnull case 32:
1907 324891a5 2006-06-25 devnull return boolcopy32;
1908 324891a5 2006-06-25 devnull default:
1909 324891a5 2006-06-25 devnull assert(0 /* boolcopyfn */);
1911 324891a5 2006-06-25 devnull return 0;
1915 324891a5 2006-06-25 devnull * Optimized draw for filling and scrolling; uses memset and memmove.
1917 324891a5 2006-06-25 devnull static void
1918 324891a5 2006-06-25 devnull memsets(void *vp, ushort val, int n)
1920 324891a5 2006-06-25 devnull ushort *p, *ep;
1922 324891a5 2006-06-25 devnull p = vp;
1923 324891a5 2006-06-25 devnull ep = p+n;
1924 324891a5 2006-06-25 devnull while(p<ep)
1925 324891a5 2006-06-25 devnull *p++ = val;
1928 324891a5 2006-06-25 devnull static void
1929 324891a5 2006-06-25 devnull memsetl(void *vp, u32int val, int n)
1931 324891a5 2006-06-25 devnull u32int *p, *ep;
1933 324891a5 2006-06-25 devnull p = vp;
1934 324891a5 2006-06-25 devnull ep = p+n;
1935 324891a5 2006-06-25 devnull while(p<ep)
1936 324891a5 2006-06-25 devnull *p++ = val;
1939 324891a5 2006-06-25 devnull static void
1940 324891a5 2006-06-25 devnull memset24(void *vp, u32int val, int n)
1942 324891a5 2006-06-25 devnull uchar *p, *ep;
1943 324891a5 2006-06-25 devnull uchar a,b,c;
1945 324891a5 2006-06-25 devnull p = vp;
1946 324891a5 2006-06-25 devnull ep = p+3*n;
1947 324891a5 2006-06-25 devnull a = val;
1948 324891a5 2006-06-25 devnull b = val>>8;
1949 324891a5 2006-06-25 devnull c = val>>16;
1950 324891a5 2006-06-25 devnull while(p<ep){
1951 324891a5 2006-06-25 devnull *p++ = a;
1952 324891a5 2006-06-25 devnull *p++ = b;
1953 324891a5 2006-06-25 devnull *p++ = c;
1958 324891a5 2006-06-25 devnull _imgtorgba(Memimage *img, u32int val)
1960 324891a5 2006-06-25 devnull uchar r, g, b, a;
1961 324891a5 2006-06-25 devnull int nb, ov, v;
1962 324891a5 2006-06-25 devnull u32int chan;
1963 324891a5 2006-06-25 devnull uchar *p;
1965 324891a5 2006-06-25 devnull a = 0xFF;
1966 324891a5 2006-06-25 devnull r = g = b = 0xAA; /* garbage */
1967 324891a5 2006-06-25 devnull for(chan=img->chan; chan; chan>>=8){
1968 324891a5 2006-06-25 devnull nb = NBITS(chan);
1969 324891a5 2006-06-25 devnull ov = v = val&((1<<nb)-1);
1970 324891a5 2006-06-25 devnull val >>= nb;
1972 324891a5 2006-06-25 devnull while(nb < 8){
1973 324891a5 2006-06-25 devnull v |= v<<nb;
1974 324891a5 2006-06-25 devnull nb *= 2;
1976 324891a5 2006-06-25 devnull v >>= (nb-8);
1978 324891a5 2006-06-25 devnull switch(TYPE(chan)){
1979 324891a5 2006-06-25 devnull case CRed:
1982 324891a5 2006-06-25 devnull case CGreen:
1985 324891a5 2006-06-25 devnull case CBlue:
1988 324891a5 2006-06-25 devnull case CAlpha:
1991 324891a5 2006-06-25 devnull case CGrey:
1992 324891a5 2006-06-25 devnull r = g = b = v;
1994 324891a5 2006-06-25 devnull case CMap:
1995 324891a5 2006-06-25 devnull p = img->cmap->cmap2rgb+3*ov;
1996 324891a5 2006-06-25 devnull r = *p++;
1997 324891a5 2006-06-25 devnull g = *p++;
1998 324891a5 2006-06-25 devnull b = *p;
2002 324891a5 2006-06-25 devnull return (r<<24)|(g<<16)|(b<<8)|a;
2006 324891a5 2006-06-25 devnull _rgbatoimg(Memimage *img, u32int rgba)
2008 324891a5 2006-06-25 devnull u32int chan;
2009 324891a5 2006-06-25 devnull int d, nb;
2010 324891a5 2006-06-25 devnull u32int v;
2011 324891a5 2006-06-25 devnull uchar *p, r, g, b, a, m;
2014 324891a5 2006-06-25 devnull r = rgba>>24;
2015 324891a5 2006-06-25 devnull g = rgba>>16;
2016 324891a5 2006-06-25 devnull b = rgba>>8;
2017 324891a5 2006-06-25 devnull a = rgba;
2019 324891a5 2006-06-25 devnull for(chan=img->chan; chan; chan>>=8){
2020 324891a5 2006-06-25 devnull nb = NBITS(chan);
2021 324891a5 2006-06-25 devnull switch(TYPE(chan)){
2022 324891a5 2006-06-25 devnull case CRed:
2023 324891a5 2006-06-25 devnull v |= (r>>(8-nb))<<d;
2025 324891a5 2006-06-25 devnull case CGreen:
2026 324891a5 2006-06-25 devnull v |= (g>>(8-nb))<<d;
2028 324891a5 2006-06-25 devnull case CBlue:
2029 324891a5 2006-06-25 devnull v |= (b>>(8-nb))<<d;
2031 324891a5 2006-06-25 devnull case CAlpha:
2032 324891a5 2006-06-25 devnull v |= (a>>(8-nb))<<d;
2034 324891a5 2006-06-25 devnull case CMap:
2035 324891a5 2006-06-25 devnull p = img->cmap->rgb2cmap;
2036 324891a5 2006-06-25 devnull m = p[(r>>4)*256+(g>>4)*16+(b>>4)];
2037 324891a5 2006-06-25 devnull v |= (m>>(8-nb))<<d;
2039 324891a5 2006-06-25 devnull case CGrey:
2040 324891a5 2006-06-25 devnull m = RGB2K(r,g,b);
2041 324891a5 2006-06-25 devnull v |= (m>>(8-nb))<<d;
2044 324891a5 2006-06-25 devnull d += nb;
2046 324891a5 2006-06-25 devnull /* print("rgba2img %.8lux = %.*lux\n", rgba, 2*d/8, v); */
2047 324891a5 2006-06-25 devnull return v;
2050 324891a5 2006-06-25 devnull #define DBG if(0)
2051 324891a5 2006-06-25 devnull static int
2052 324891a5 2006-06-25 devnull memoptdraw(Memdrawparam *par)
2054 324891a5 2006-06-25 devnull int m, y, dy, dx, op;
2055 324891a5 2006-06-25 devnull u32int v;
2056 324891a5 2006-06-25 devnull Memimage *src;
2057 324891a5 2006-06-25 devnull Memimage *dst;
2059 324891a5 2006-06-25 devnull dx = Dx(par->r);
2060 324891a5 2006-06-25 devnull dy = Dy(par->r);
2061 324891a5 2006-06-25 devnull src = par->src;
2062 324891a5 2006-06-25 devnull dst = par->dst;
2063 324891a5 2006-06-25 devnull op = par->op;
2065 324891a5 2006-06-25 devnull DBG print("state %lux mval %lux dd %d\n", par->state, par->mval, dst->depth);
2067 324891a5 2006-06-25 devnull * If we have an opaque mask and source is one opaque pixel we can convert to the
2068 324891a5 2006-06-25 devnull * destination format and just replicate with memset.
2070 324891a5 2006-06-25 devnull m = Simplesrc|Simplemask|Fullmask;
2071 324891a5 2006-06-25 devnull if((par->state&m)==m && (par->srgba&0xFF) == 0xFF && (op ==S || op == SoverD)){
2072 324891a5 2006-06-25 devnull uchar *dp, p[4];
2073 324891a5 2006-06-25 devnull int d, dwid, ppb, np, nb;
2074 324891a5 2006-06-25 devnull uchar lm, rm;
2076 324891a5 2006-06-25 devnull DBG print("memopt, dst %p, dst->data->bdata %p\n", dst, dst->data->bdata);
2077 324891a5 2006-06-25 devnull dwid = dst->width*sizeof(u32int);
2078 324891a5 2006-06-25 devnull dp = byteaddr(dst, par->r.min);
2079 324891a5 2006-06-25 devnull v = par->sdval;
2080 324891a5 2006-06-25 devnull DBG print("sdval %lud, depth %d\n", v, dst->depth);
2081 324891a5 2006-06-25 devnull switch(dst->depth){
2082 324891a5 2006-06-25 devnull case 1:
2083 324891a5 2006-06-25 devnull case 2:
2084 324891a5 2006-06-25 devnull case 4:
2085 324891a5 2006-06-25 devnull for(d=dst->depth; d<8; d*=2)
2086 324891a5 2006-06-25 devnull v |= (v<<d);
2087 324891a5 2006-06-25 devnull ppb = 8/dst->depth; /* pixels per byte */
2088 324891a5 2006-06-25 devnull m = ppb-1;
2089 324891a5 2006-06-25 devnull /* left edge */
2090 324891a5 2006-06-25 devnull np = par->r.min.x&m; /* no. pixels unused on left side of word */
2091 324891a5 2006-06-25 devnull dx -= (ppb-np);
2092 324891a5 2006-06-25 devnull nb = 8 - np * dst->depth; /* no. bits used on right side of word */
2093 324891a5 2006-06-25 devnull lm = (1<<nb)-1;
2094 324891a5 2006-06-25 devnull DBG print("np %d x %d nb %d lm %ux ppb %d m %ux\n", np, par->r.min.x, nb, lm, ppb, m);
2096 324891a5 2006-06-25 devnull /* right edge */
2097 324891a5 2006-06-25 devnull np = par->r.max.x&m; /* no. pixels used on left side of word */
2098 324891a5 2006-06-25 devnull dx -= np;
2099 324891a5 2006-06-25 devnull nb = 8 - np * dst->depth; /* no. bits unused on right side of word */
2100 324891a5 2006-06-25 devnull rm = ~((1<<nb)-1);
2101 324891a5 2006-06-25 devnull DBG print("np %d x %d nb %d rm %ux ppb %d m %ux\n", np, par->r.max.x, nb, rm, ppb, m);
2103 324891a5 2006-06-25 devnull DBG print("dx %d Dx %d\n", dx, Dx(par->r));
2104 324891a5 2006-06-25 devnull /* lm, rm are masks that are 1 where we should touch the bits */
2105 324891a5 2006-06-25 devnull if(dx < 0){ /* just one byte */
2106 324891a5 2006-06-25 devnull lm &= rm;
2107 324891a5 2006-06-25 devnull for(y=0; y<dy; y++, dp+=dwid)
2108 324891a5 2006-06-25 devnull *dp ^= (v ^ *dp) & lm;
2109 324891a5 2006-06-25 devnull }else if(dx == 0){ /* no full bytes */
2111 324891a5 2006-06-25 devnull dwid--;
2113 324891a5 2006-06-25 devnull for(y=0; y<dy; y++, dp+=dwid){
2114 324891a5 2006-06-25 devnull if(lm){
2115 324891a5 2006-06-25 devnull DBG print("dp %p v %lux lm %ux (v ^ *dp) & lm %lux\n", dp, v, lm, (v^*dp)&lm);
2116 324891a5 2006-06-25 devnull *dp ^= (v ^ *dp) & lm;
2119 324891a5 2006-06-25 devnull *dp ^= (v ^ *dp) & rm;
2121 324891a5 2006-06-25 devnull }else{ /* full bytes in middle */
2122 324891a5 2006-06-25 devnull dx /= ppb;
2124 324891a5 2006-06-25 devnull dwid--;
2125 324891a5 2006-06-25 devnull dwid -= dx;
2127 324891a5 2006-06-25 devnull for(y=0; y<dy; y++, dp+=dwid){
2128 324891a5 2006-06-25 devnull if(lm){
2129 324891a5 2006-06-25 devnull *dp ^= (v ^ *dp) & lm;
2132 324891a5 2006-06-25 devnull memset(dp, v, dx);
2133 324891a5 2006-06-25 devnull dp += dx;
2134 324891a5 2006-06-25 devnull *dp ^= (v ^ *dp) & rm;
2137 324891a5 2006-06-25 devnull return 1;
2138 324891a5 2006-06-25 devnull case 8:
2139 324891a5 2006-06-25 devnull for(y=0; y<dy; y++, dp+=dwid)
2140 324891a5 2006-06-25 devnull memset(dp, v, dx);
2141 324891a5 2006-06-25 devnull return 1;
2142 324891a5 2006-06-25 devnull case 16:
2143 324891a5 2006-06-25 devnull p[0] = v; /* make little endian */
2144 324891a5 2006-06-25 devnull p[1] = v>>8;
2145 324891a5 2006-06-25 devnull v = *(ushort*)p;
2146 324891a5 2006-06-25 devnull DBG print("dp=%p; dx=%d; for(y=0; y<%d; y++, dp+=%d)\nmemsets(dp, v, dx);\n",
2147 324891a5 2006-06-25 devnull dp, dx, dy, dwid);
2148 324891a5 2006-06-25 devnull for(y=0; y<dy; y++, dp+=dwid)
2149 324891a5 2006-06-25 devnull memsets(dp, v, dx);
2150 324891a5 2006-06-25 devnull return 1;
2151 324891a5 2006-06-25 devnull case 24:
2152 324891a5 2006-06-25 devnull for(y=0; y<dy; y++, dp+=dwid)
2153 324891a5 2006-06-25 devnull memset24(dp, v, dx);
2154 324891a5 2006-06-25 devnull return 1;
2155 324891a5 2006-06-25 devnull case 32:
2156 324891a5 2006-06-25 devnull p[0] = v; /* make little endian */
2157 324891a5 2006-06-25 devnull p[1] = v>>8;
2158 324891a5 2006-06-25 devnull p[2] = v>>16;
2159 324891a5 2006-06-25 devnull p[3] = v>>24;
2160 324891a5 2006-06-25 devnull v = *(u32int*)p;
2161 324891a5 2006-06-25 devnull for(y=0; y<dy; y++, dp+=dwid)
2162 324891a5 2006-06-25 devnull memsetl(dp, v, dx);
2163 324891a5 2006-06-25 devnull return 1;
2164 324891a5 2006-06-25 devnull default:
2165 324891a5 2006-06-25 devnull assert(0 /* bad dest depth in memoptdraw */);
2170 324891a5 2006-06-25 devnull * If no source alpha, an opaque mask, we can just copy the
2171 324891a5 2006-06-25 devnull * source onto the destination. If the channels are the same and
2172 324891a5 2006-06-25 devnull * the source is not replicated, memmove suffices.
2174 324891a5 2006-06-25 devnull m = Simplemask|Fullmask;
2175 324891a5 2006-06-25 devnull if((par->state&(m|Replsrc))==m && src->depth >= 8
2176 324891a5 2006-06-25 devnull && src->chan == dst->chan && !(src->flags&Falpha) && (op == S || op == SoverD)){
2177 324891a5 2006-06-25 devnull uchar *sp, *dp;
2178 324891a5 2006-06-25 devnull long swid, dwid, nb;
2179 324891a5 2006-06-25 devnull int dir;
2181 324891a5 2006-06-25 devnull if(src->data == dst->data && byteaddr(dst, par->r.min) > byteaddr(src, par->sr.min))
2182 324891a5 2006-06-25 devnull dir = -1;
2184 324891a5 2006-06-25 devnull dir = 1;
2186 324891a5 2006-06-25 devnull swid = src->width*sizeof(u32int);
2187 324891a5 2006-06-25 devnull dwid = dst->width*sizeof(u32int);
2188 324891a5 2006-06-25 devnull sp = byteaddr(src, par->sr.min);
2189 324891a5 2006-06-25 devnull dp = byteaddr(dst, par->r.min);
2190 324891a5 2006-06-25 devnull if(dir == -1){
2191 324891a5 2006-06-25 devnull sp += (dy-1)*swid;
2192 324891a5 2006-06-25 devnull dp += (dy-1)*dwid;
2193 324891a5 2006-06-25 devnull swid = -swid;
2194 324891a5 2006-06-25 devnull dwid = -dwid;
2196 324891a5 2006-06-25 devnull nb = (dx*src->depth)/8;
2197 324891a5 2006-06-25 devnull for(y=0; y<dy; y++, sp+=swid, dp+=dwid)
2198 324891a5 2006-06-25 devnull memmove(dp, sp, nb);
2199 324891a5 2006-06-25 devnull return 1;
2203 324891a5 2006-06-25 devnull * If we have a 1-bit mask, 1-bit source, and 1-bit destination, and
2204 324891a5 2006-06-25 devnull * they're all bit aligned, we can just use bit operators. This happens
2205 324891a5 2006-06-25 devnull * when we're manipulating boolean masks, e.g. in the arc code.
2207 324891a5 2006-06-25 devnull if((par->state&(Simplemask|Simplesrc|Replmask|Replsrc))==0
2208 324891a5 2006-06-25 devnull && dst->chan==GREY1 && src->chan==GREY1 && par->mask->chan==GREY1
2209 324891a5 2006-06-25 devnull && (par->r.min.x&7)==(par->sr.min.x&7) && (par->r.min.x&7)==(par->mr.min.x&7)){
2210 324891a5 2006-06-25 devnull uchar *sp, *dp, *mp;
2211 324891a5 2006-06-25 devnull uchar lm, rm;
2212 324891a5 2006-06-25 devnull long swid, dwid, mwid;
2213 324891a5 2006-06-25 devnull int i, x, dir;
2215 324891a5 2006-06-25 devnull sp = byteaddr(src, par->sr.min);
2216 324891a5 2006-06-25 devnull dp = byteaddr(dst, par->r.min);
2217 324891a5 2006-06-25 devnull mp = byteaddr(par->mask, par->mr.min);
2218 324891a5 2006-06-25 devnull swid = src->width*sizeof(u32int);
2219 324891a5 2006-06-25 devnull dwid = dst->width*sizeof(u32int);
2220 324891a5 2006-06-25 devnull mwid = par->mask->width*sizeof(u32int);
2222 324891a5 2006-06-25 devnull if(src->data == dst->data && byteaddr(dst, par->r.min) > byteaddr(src, par->sr.min)){
2223 324891a5 2006-06-25 devnull dir = -1;
2225 324891a5 2006-06-25 devnull dir = 1;
2227 324891a5 2006-06-25 devnull lm = 0xFF>>(par->r.min.x&7);
2228 324891a5 2006-06-25 devnull rm = 0xFF<<(8-(par->r.max.x&7));
2229 324891a5 2006-06-25 devnull dx -= (8-(par->r.min.x&7)) + (par->r.max.x&7);
2231 324891a5 2006-06-25 devnull if(dx < 0){ /* one byte wide */
2232 324891a5 2006-06-25 devnull lm &= rm;
2233 324891a5 2006-06-25 devnull if(dir == -1){
2234 324891a5 2006-06-25 devnull dp += dwid*(dy-1);
2235 324891a5 2006-06-25 devnull sp += swid*(dy-1);
2236 324891a5 2006-06-25 devnull mp += mwid*(dy-1);
2237 324891a5 2006-06-25 devnull dwid = -dwid;
2238 324891a5 2006-06-25 devnull swid = -swid;
2239 324891a5 2006-06-25 devnull mwid = -mwid;
2241 324891a5 2006-06-25 devnull for(y=0; y<dy; y++){
2242 324891a5 2006-06-25 devnull *dp ^= (*dp ^ *sp) & *mp & lm;
2243 324891a5 2006-06-25 devnull dp += dwid;
2244 324891a5 2006-06-25 devnull sp += swid;
2245 324891a5 2006-06-25 devnull mp += mwid;
2247 324891a5 2006-06-25 devnull return 1;
2250 324891a5 2006-06-25 devnull dx /= 8;
2251 324891a5 2006-06-25 devnull if(dir == 1){
2252 324891a5 2006-06-25 devnull i = (lm!=0)+dx+(rm!=0);
2253 324891a5 2006-06-25 devnull mwid -= i;
2254 324891a5 2006-06-25 devnull swid -= i;
2255 324891a5 2006-06-25 devnull dwid -= i;
2256 324891a5 2006-06-25 devnull for(y=0; y<dy; y++, dp+=dwid, sp+=swid, mp+=mwid){
2257 324891a5 2006-06-25 devnull if(lm){
2258 324891a5 2006-06-25 devnull *dp ^= (*dp ^ *sp++) & *mp++ & lm;
2261 324891a5 2006-06-25 devnull for(x=0; x<dx; x++){
2262 324891a5 2006-06-25 devnull *dp ^= (*dp ^ *sp++) & *mp++;
2265 324891a5 2006-06-25 devnull if(rm){
2266 324891a5 2006-06-25 devnull *dp ^= (*dp ^ *sp++) & *mp++ & rm;
2270 324891a5 2006-06-25 devnull return 1;
2272 324891a5 2006-06-25 devnull /* dir == -1 */
2273 324891a5 2006-06-25 devnull i = (lm!=0)+dx+(rm!=0);
2274 324891a5 2006-06-25 devnull dp += dwid*(dy-1)+i-1;
2275 324891a5 2006-06-25 devnull sp += swid*(dy-1)+i-1;
2276 324891a5 2006-06-25 devnull mp += mwid*(dy-1)+i-1;
2277 324891a5 2006-06-25 devnull dwid = -dwid+i;
2278 324891a5 2006-06-25 devnull swid = -swid+i;
2279 324891a5 2006-06-25 devnull mwid = -mwid+i;
2280 324891a5 2006-06-25 devnull for(y=0; y<dy; y++, dp+=dwid, sp+=swid, mp+=mwid){
2281 324891a5 2006-06-25 devnull if(rm){
2282 324891a5 2006-06-25 devnull *dp ^= (*dp ^ *sp--) & *mp-- & rm;
2285 324891a5 2006-06-25 devnull for(x=0; x<dx; x++){
2286 324891a5 2006-06-25 devnull *dp ^= (*dp ^ *sp--) & *mp--;
2289 324891a5 2006-06-25 devnull if(lm){
2290 324891a5 2006-06-25 devnull *dp ^= (*dp ^ *sp--) & *mp-- & lm;
2295 324891a5 2006-06-25 devnull return 1;
2297 324891a5 2006-06-25 devnull return 0;
2299 324891a5 2006-06-25 devnull #undef DBG
2302 324891a5 2006-06-25 devnull * Boolean character drawing.
2303 324891a5 2006-06-25 devnull * Solid opaque color through a 1-bit greyscale mask.
2305 324891a5 2006-06-25 devnull #define DBG if(0)
2306 324891a5 2006-06-25 devnull static int
2307 324891a5 2006-06-25 devnull chardraw(Memdrawparam *par)
2309 324891a5 2006-06-25 devnull u32int bits;
2310 324891a5 2006-06-25 devnull int i, ddepth, dy, dx, x, bx, ex, y, npack, bsh, depth, op;
2311 324891a5 2006-06-25 devnull u32int v, maskwid, dstwid;
2312 324891a5 2006-06-25 devnull uchar *wp, *rp, *q, *wc;
2313 324891a5 2006-06-25 devnull ushort *ws;
2314 324891a5 2006-06-25 devnull u32int *wl;
2315 324891a5 2006-06-25 devnull uchar sp[4];
2316 324891a5 2006-06-25 devnull Rectangle r, mr;
2317 324891a5 2006-06-25 devnull Memimage *mask, *src, *dst;
2319 324891a5 2006-06-25 devnull if(0) if(drawdebug) iprint("chardraw? mf %lux md %d sf %lux dxs %d dys %d dd %d ddat %p sdat %p\n",
2320 324891a5 2006-06-25 devnull par->mask->flags, par->mask->depth, par->src->flags,
2321 324891a5 2006-06-25 devnull Dx(par->src->r), Dy(par->src->r), par->dst->depth, par->dst->data, par->src->data);
2323 324891a5 2006-06-25 devnull mask = par->mask;
2324 324891a5 2006-06-25 devnull src = par->src;
2325 324891a5 2006-06-25 devnull dst = par->dst;
2326 324891a5 2006-06-25 devnull r = par->r;
2327 324891a5 2006-06-25 devnull mr = par->mr;
2328 324891a5 2006-06-25 devnull op = par->op;
2330 324891a5 2006-06-25 devnull if((par->state&(Replsrc|Simplesrc|Fullsrc|Replmask)) != (Replsrc|Simplesrc|Fullsrc)
2331 324891a5 2006-06-25 devnull || mask->depth != 1 || dst->depth<8 || dst->data==src->data
2332 324891a5 2006-06-25 devnull || op != SoverD)
2333 324891a5 2006-06-25 devnull return 0;
2335 324891a5 2006-06-25 devnull /*if(drawdebug) iprint("chardraw..."); */
2337 324891a5 2006-06-25 devnull depth = mask->depth;
2338 324891a5 2006-06-25 devnull maskwid = mask->width*sizeof(u32int);
2339 324891a5 2006-06-25 devnull rp = byteaddr(mask, mr.min);
2340 324891a5 2006-06-25 devnull npack = 8/depth;
2341 324891a5 2006-06-25 devnull bsh = (mr.min.x % npack) * depth;
2343 324891a5 2006-06-25 devnull wp = byteaddr(dst, r.min);
2344 324891a5 2006-06-25 devnull dstwid = dst->width*sizeof(u32int);
2345 324891a5 2006-06-25 devnull DBG print("bsh %d\n", bsh);
2346 324891a5 2006-06-25 devnull dy = Dy(r);
2347 324891a5 2006-06-25 devnull dx = Dx(r);
2349 324891a5 2006-06-25 devnull ddepth = dst->depth;
2352 324891a5 2006-06-25 devnull * for loop counts from bsh to bsh+dx
2354 324891a5 2006-06-25 devnull * we want the bottom bits to be the amount
2355 324891a5 2006-06-25 devnull * to shift the pixels down, so for n≡0 (mod 8) we want
2356 324891a5 2006-06-25 devnull * bottom bits 7. for n≡1, 6, etc.
2357 324891a5 2006-06-25 devnull * the bits come from -n-1.
2360 324891a5 2006-06-25 devnull bx = -bsh-1;
2361 324891a5 2006-06-25 devnull ex = -bsh-1-dx;
2362 324891a5 2006-06-25 devnull SET(bits);
2363 324891a5 2006-06-25 devnull v = par->sdval;
2365 324891a5 2006-06-25 devnull /* make little endian */
2366 324891a5 2006-06-25 devnull sp[0] = v;
2367 324891a5 2006-06-25 devnull sp[1] = v>>8;
2368 324891a5 2006-06-25 devnull sp[2] = v>>16;
2369 324891a5 2006-06-25 devnull sp[3] = v>>24;
2371 324891a5 2006-06-25 devnull /*print("sp %x %x %x %x\n", sp[0], sp[1], sp[2], sp[3]); */
2372 324891a5 2006-06-25 devnull for(y=0; y<dy; y++, rp+=maskwid, wp+=dstwid){
2373 324891a5 2006-06-25 devnull q = rp;
2374 324891a5 2006-06-25 devnull if(bsh)
2375 324891a5 2006-06-25 devnull bits = *q++;
2376 324891a5 2006-06-25 devnull switch(ddepth){
2377 324891a5 2006-06-25 devnull case 8:
2378 324891a5 2006-06-25 devnull /*if(drawdebug) iprint("8loop..."); */
2379 324891a5 2006-06-25 devnull wc = wp;
2380 324891a5 2006-06-25 devnull for(x=bx; x>ex; x--, wc++){
2381 324891a5 2006-06-25 devnull i = x&7;
2382 324891a5 2006-06-25 devnull if(i == 8-1)
2383 324891a5 2006-06-25 devnull bits = *q++;
2384 324891a5 2006-06-25 devnull DBG print("bits %lux sh %d...", bits, i);
2385 324891a5 2006-06-25 devnull if((bits>>i)&1)
2386 324891a5 2006-06-25 devnull *wc = v;
2389 324891a5 2006-06-25 devnull case 16:
2390 324891a5 2006-06-25 devnull ws = (ushort*)wp;
2391 324891a5 2006-06-25 devnull v = *(ushort*)sp;
2392 324891a5 2006-06-25 devnull for(x=bx; x>ex; x--, ws++){
2393 324891a5 2006-06-25 devnull i = x&7;
2394 324891a5 2006-06-25 devnull if(i == 8-1)
2395 324891a5 2006-06-25 devnull bits = *q++;
2396 324891a5 2006-06-25 devnull DBG print("bits %lux sh %d...", bits, i);
2397 324891a5 2006-06-25 devnull if((bits>>i)&1)
2398 324891a5 2006-06-25 devnull *ws = v;
2401 324891a5 2006-06-25 devnull case 24:
2402 324891a5 2006-06-25 devnull wc = wp;
2403 324891a5 2006-06-25 devnull for(x=bx; x>ex; x--, wc+=3){
2404 324891a5 2006-06-25 devnull i = x&7;
2405 324891a5 2006-06-25 devnull if(i == 8-1)
2406 324891a5 2006-06-25 devnull bits = *q++;
2407 324891a5 2006-06-25 devnull DBG print("bits %lux sh %d...", bits, i);
2408 324891a5 2006-06-25 devnull if((bits>>i)&1){
2409 324891a5 2006-06-25 devnull wc[0] = sp[0];
2410 324891a5 2006-06-25 devnull wc[1] = sp[1];
2411 324891a5 2006-06-25 devnull wc[2] = sp[2];
2415 324891a5 2006-06-25 devnull case 32:
2416 324891a5 2006-06-25 devnull wl = (u32int*)wp;
2417 324891a5 2006-06-25 devnull v = *(u32int*)sp;
2418 324891a5 2006-06-25 devnull for(x=bx; x>ex; x--, wl++){
2419 324891a5 2006-06-25 devnull i = x&7;
2420 324891a5 2006-06-25 devnull if(i == 8-1)
2421 324891a5 2006-06-25 devnull bits = *q++;
2422 324891a5 2006-06-25 devnull DBG iprint("bits %lux sh %d...", bits, i);
2423 324891a5 2006-06-25 devnull if((bits>>i)&1)
2424 324891a5 2006-06-25 devnull *wl = v;
2430 324891a5 2006-06-25 devnull DBG print("\n");
2431 324891a5 2006-06-25 devnull return 1;
2433 324891a5 2006-06-25 devnull #undef DBG
2437 324891a5 2006-06-25 devnull * Fill entire byte with replicated (if necessary) copy of source pixel,
2438 324891a5 2006-06-25 devnull * assuming destination ldepth is >= source ldepth.
2440 324891a5 2006-06-25 devnull * This code is just plain wrong for >8bpp.
2443 324891a5 2006-06-25 devnull membyteval(Memimage *src)
2445 324891a5 2006-06-25 devnull int i, val, bpp;
2446 324891a5 2006-06-25 devnull uchar uc;
2448 324891a5 2006-06-25 devnull unloadmemimage(src, src->r, &uc, 1);
2449 324891a5 2006-06-25 devnull bpp = src->depth;
2450 324891a5 2006-06-25 devnull uc <<= (src->r.min.x&(7/src->depth))*src->depth;
2451 324891a5 2006-06-25 devnull uc &= ~(0xFF>>bpp);
2452 324891a5 2006-06-25 devnull * pixel value is now in high part of byte. repeat throughout byte
2453 324891a5 2006-06-25 devnull val = uc;
2454 324891a5 2006-06-25 devnull for(i=bpp; i<8; i<<=1)
2455 324891a5 2006-06-25 devnull val |= val>>i;
2456 324891a5 2006-06-25 devnull return val;
2462 324891a5 2006-06-25 devnull _memfillcolor(Memimage *i, u32int val)
2464 324891a5 2006-06-25 devnull u32int bits;
2465 324891a5 2006-06-25 devnull int d, y;
2466 324891a5 2006-06-25 devnull uchar p[4];
2468 324891a5 2006-06-25 devnull if(val == DNofill)
2469 324891a5 2006-06-25 devnull return;
2471 324891a5 2006-06-25 devnull bits = _rgbatoimg(i, val);
2472 324891a5 2006-06-25 devnull switch(i->depth){
2473 324891a5 2006-06-25 devnull case 24: /* 24-bit images suck */
2474 324891a5 2006-06-25 devnull for(y=i->r.min.y; y<i->r.max.y; y++)
2475 324891a5 2006-06-25 devnull memset24(byteaddr(i, Pt(i->r.min.x, y)), bits, Dx(i->r));
2477 324891a5 2006-06-25 devnull default: /* 1, 2, 4, 8, 16, 32 */
2478 324891a5 2006-06-25 devnull for(d=i->depth; d<32; d*=2)
2479 324891a5 2006-06-25 devnull bits = (bits << d) | bits;
2480 324891a5 2006-06-25 devnull p[0] = bits; /* make little endian */
2481 324891a5 2006-06-25 devnull p[1] = bits>>8;
2482 324891a5 2006-06-25 devnull p[2] = bits>>16;
2483 324891a5 2006-06-25 devnull p[3] = bits>>24;
2484 324891a5 2006-06-25 devnull bits = *(u32int*)p;
2485 324891a5 2006-06-25 devnull memsetl(wordaddr(i, i->r.min), bits, i->width*Dy(i->r));
