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[enigma2.git] / lib / gdi / gpixmap.cpp
1 #include <lib/gdi/gpixmap.h>
2 #include <lib/gdi/region.h>
3 #include <lib/gdi/accel.h>
4
5 gLookup::gLookup()
6         :size(0), lookup(0)
7 {
8 }
9
10 gLookup::gLookup(int size, const gPalette &pal, const gRGB &start, const gRGB &end)
11         :size(0), lookup(0)
12 {
13         build(size, pal, start, end);
14 }
15
16 void gLookup::build(int _size, const gPalette &pal, const gRGB &start, const gRGB &end)
17 {
18         if (lookup)
19         {
20                 delete [] lookup;
21                 lookup=0;
22                 size=0;
23         }
24         size=_size;
25         if (!size)
26                 return;
27         lookup=new gColor[size];
28         
29         for (int i=0; i<size; i++)
30         {
31                 gRGB col;
32                 if (i)
33                 {
34                         int rdiff=-start.r+end.r;
35                         int gdiff=-start.g+end.g;
36                         int bdiff=-start.b+end.b;
37                         int adiff=-start.a+end.a;
38                         rdiff*=i; rdiff/=(size-1);
39                         gdiff*=i; gdiff/=(size-1);
40                         bdiff*=i; bdiff/=(size-1);
41                         adiff*=i; adiff/=(size-1);
42                         col.r=start.r+rdiff;
43                         col.g=start.g+gdiff;
44                         col.b=start.b+bdiff;
45                         col.a=start.a+adiff;
46                 } else
47                         col=start;
48                 lookup[i]=pal.findColor(col);
49         }
50 }
51
52 gSurface::gSurface()
53 {
54         x = 0;
55         y = 0;
56         bpp = 0;
57         bypp = 0;
58         stride = 0;
59         data = 0;
60         data_phys = 0;
61         clut.colors = 0;
62         clut.data = 0;
63         type = 0;
64 }
65
66 gSurface::gSurface(eSize size, int _bpp, int accel)
67 {
68         x = size.width();
69         y = size.height();
70         bpp = _bpp;
71
72         switch (bpp)
73         {
74         case 8:
75                 bypp = 1;
76                 break;
77         case 15:
78         case 16:
79                 bypp = 2;
80                 break;
81         case 24:                // never use 24bit mode
82         case 32:
83                 bypp = 4;
84                 break;
85         default:
86                 bypp = (bpp+7)/8;
87         }
88
89         stride = x*bypp;
90         
91         data = 0;
92         data_phys = 0;
93         
94         if (accel)
95         {
96                 stride += 63;
97                 stride &=~63;
98                 
99                 if (gAccel::getInstance())
100                         eDebug("accel memory: %d", gAccel::getInstance()->accelAlloc(data, data_phys, y * stride));
101                 else
102                         eDebug("no accel available");
103         }
104         
105         clut.colors = 0;
106         clut.data = 0;
107
108         if (!data)
109                 data = malloc(y * stride);
110         
111         type = 1;
112 }
113
114 gSurface::~gSurface()
115 {
116         if (type)
117         {
118                 if (data_phys)
119                         gAccel::getInstance()->accelFree(data_phys);
120                 else
121                         free(data);
122
123                 delete[] clut.data;
124         }
125 }
126
127 gPixmap *gPixmap::lock()
128 {
129         contentlock.lock(1);
130         return this;
131 }
132
133 void gPixmap::unlock()
134 {
135         contentlock.unlock(1);
136 }
137
138 void gPixmap::fill(const gRegion &region, const gColor &color)
139 {
140         unsigned int i;
141         for (i=0; i<region.rects.size(); ++i)
142         {
143                 const eRect &area = region.rects[i];
144                 if ((area.height()<=0) || (area.width()<=0))
145                         continue;
146
147                 if (surface->bpp == 8)
148                 {
149                         for (int y=area.top(); y<area.bottom(); y++)
150                                 memset(((__u8*)surface->data)+y*surface->stride+area.left(), color.color, area.width());
151                 } else if (surface->bpp == 32)
152                 {
153                         __u32 col;
154
155                         if (surface->clut.data && color < surface->clut.colors)
156                                 col=(surface->clut.data[color].a<<24)|(surface->clut.data[color].r<<16)|(surface->clut.data[color].g<<8)|(surface->clut.data[color].b);
157                         else
158                                 col=0x10101*color;
159                         
160                         col^=0xFF000000;                        
161
162                         if (surface->data_phys && gAccel::getInstance())
163                                 if (!gAccel::getInstance()->fill(surface,  area, col))
164                                         continue;
165
166                         for (int y=area.top(); y<area.bottom(); y++)
167                         {
168                                 __u32 *dst=(__u32*)(((__u8*)surface->data)+y*surface->stride+area.left()*surface->bypp);
169                                 int x=area.width();
170                                 while (x--)
171                                         *dst++=col;
172                         }
173                 }       else
174                         eWarning("couldn't fill %d bpp", surface->bpp);
175         }
176 }
177
178 void gPixmap::blit(const gPixmap &src, ePoint pos, const gRegion &clip, int flag)
179 {
180         for (unsigned int i=0; i<clip.rects.size(); ++i)
181         {
182                 eRect area=eRect(pos, src.size());
183                 area&=clip.rects[i];
184                 area&=eRect(ePoint(0, 0), size());
185                 if ((area.width()<0) || (area.height()<0))
186                         continue;
187
188                 eRect srcarea=area;
189                 srcarea.moveBy(-pos.x(), -pos.y());
190                 
191                 if ((surface->data_phys && src.surface->data_phys) && (gAccel::getInstance()))
192                         if (!gAccel::getInstance()->blit(surface, src.surface, area.topLeft(), srcarea, flag))
193                                 continue;
194                 flag &= ~ blitAlphaBlend;
195                 
196                 if ((surface->bpp == 8) && (src.surface->bpp==8))
197                 {
198                         __u8 *srcptr=(__u8*)src.surface->data;
199                         __u8 *dstptr=(__u8*)surface->data;
200         
201                         srcptr+=srcarea.left()*src.surface->bypp+srcarea.top()*src.surface->stride;
202                         dstptr+=area.left()*surface->bypp+area.top()*surface->stride;
203                         for (int y=0; y<area.height(); y++)
204                         {
205                                 if (flag & blitAlphaTest)
206                                 {
207                       // no real alphatest yet
208                                         int width=area.width();
209                                         unsigned char *src=(unsigned char*)srcptr;
210                                         unsigned char *dst=(unsigned char*)dstptr;
211                                                 // use duff's device here!
212                                         while (width--)
213                                         {
214                                                 if (!*src)
215                                                 {
216                                                         src++;
217                                                         dst++;
218                                                 } else
219                                                         *dst++=*src++;
220                                         }
221                                 } else
222                                         memcpy(dstptr, srcptr, area.width()*surface->bypp);
223                                 srcptr+=src.surface->stride;
224                                 dstptr+=surface->stride;
225                         }
226                 } else if ((surface->bpp == 32) && (src.surface->bpp==32))
227                 {
228                         __u32 *srcptr=(__u32*)src.surface->data;
229                         __u32 *dstptr=(__u32*)surface->data;
230         
231                         srcptr+=srcarea.left()+srcarea.top()*src.surface->stride/4;
232                         dstptr+=area.left()+area.top()*surface->stride/4;
233                         for (int y=0; y<area.height(); y++)
234                         {
235                                 if (flag & blitAlphaTest)
236                                 {
237                                         int width=area.width();
238                                         unsigned long *src=(unsigned long*)srcptr;
239                                         unsigned long *dst=(unsigned long*)dstptr;
240
241                                         while (width--)
242                                         {
243                                                 if (!((*src)&0xFF000000))
244                                                 {
245                                                         src++;
246                                                         dst++;
247                                                 } else
248                                                         *dst++=*src++;
249                                         }
250                                 } else if (flag & blitAlphaBlend)
251                                 {
252                                         // uh oh. this is only until hardware accel is working.
253                                         
254                                         int width=area.width();
255                                                         // ARGB color space!
256                                         unsigned char *src=(unsigned char*)srcptr;
257                                         unsigned char *dst=(unsigned char*)dstptr;
258
259 #define BLEND(x, y, a) (y + ((x-y) * a)/256)
260                                         while (width--)
261                                         {
262                                                 unsigned char sa = src[3];
263                                                 unsigned char sr = src[2];
264                                                 unsigned char sg = src[1];
265                                                 unsigned char sb = src[0];
266
267                                                 unsigned char da = dst[3];
268                                                 unsigned char dr = dst[2];
269                                                 unsigned char dg = dst[1];
270                                                 unsigned char db = dst[0];
271                                                 
272                                                 dst[3] = BLEND(0xFF, da, sa);
273                                                 dst[2] = BLEND(sr, dr, sa);
274                                                 dst[1] = BLEND(sg, dg, sa);
275                                                 dst[0] = BLEND(sb, db, sa);
276                                                 
277                                                 src += 4; dst += 4;
278                                         }
279                                 } else
280                                         memcpy(dstptr, srcptr, area.width()*surface->bypp);
281                                 srcptr+=src.surface->stride/4;
282                                 dstptr+=surface->stride/4;
283                         }
284                 } else if ((surface->bpp == 32) && (src.surface->bpp==8))
285                 {       
286                         __u8 *srcptr=(__u8*)src.surface->data;
287                         __u8 *dstptr=(__u8*)surface->data; // !!
288                         __u32 pal[256];
289
290                         for (int i=0; i<256; ++i)
291                         {
292                                 if (src.surface->clut.data && (i<src.surface->clut.colors))
293                                         pal[i]=(src.surface->clut.data[i].a<<24)|(src.surface->clut.data[i].r<<16)|(src.surface->clut.data[i].g<<8)|(src.surface->clut.data[i].b);
294                                 else
295                                         pal[i]=0x010101*i;
296                                 pal[i]^=0xFF000000;
297                         }
298         
299                         srcptr+=srcarea.left()*src.surface->bypp+srcarea.top()*src.surface->stride;
300                         dstptr+=area.left()*surface->bypp+area.top()*surface->stride;
301                         for (int y=0; y<area.height(); y++)
302                         {
303                                 if (flag & blitAlphaTest)
304                                 {
305                       // no real alphatest yet
306                                         int width=area.width();
307                                         unsigned char *src=(unsigned char*)srcptr;
308                                         __u32 *dst=(__u32*)dstptr;
309                                                 // use duff's device here!
310                                         while (width--)
311                                         {
312                                                 if (!*src)
313                                                 {
314                                                         src++;
315                                                         dst++;
316                                                 } else
317                                                         *dst++=pal[*src++];
318                                         }
319                                 } else
320                                 {
321                                         int width=area.width();
322                                         unsigned char *src=(unsigned char*)srcptr;
323                                         __u32 *dst=(__u32*)dstptr;
324                                         while (width--)
325                                                 *dst++=pal[*src++];
326                                 }
327                                 srcptr+=src.surface->stride;
328                                 dstptr+=surface->stride;
329                         }
330                 } else
331                         eFatal("cannot blit %dbpp from %dbpp", surface->bpp, src.surface->bpp);
332         }
333 }
334
335 void gPixmap::mergePalette(const gPixmap &target)
336 {
337         if ((!surface->clut.colors) || (!target.surface->clut.colors))
338                 return;
339
340         gColor *lookup=new gColor[surface->clut.colors];
341
342         for (int i=0; i<surface->clut.colors; i++)
343                 lookup[i].color=target.surface->clut.findColor(surface->clut.data[i]);
344         
345         delete [] surface->clut.data;
346         surface->clut.colors=target.surface->clut.colors;
347         surface->clut.data=new gRGB[surface->clut.colors];
348         memcpy(surface->clut.data, target.surface->clut.data, sizeof(gRGB)*surface->clut.colors);
349
350         __u8 *dstptr=(__u8*)surface->data;
351
352         for (int ay=0; ay<surface->y; ay++)
353         {
354                 for (int ax=0; ax<surface->x; ax++)
355                         dstptr[ax]=lookup[dstptr[ax]];
356                 dstptr+=surface->stride;
357         }
358         
359         delete [] lookup;
360 }
361
362 static inline int sgn(int a)
363 {
364         if (a < 0)
365                 return -1;
366         else if (!a)
367                 return 0;
368         else
369                 return 1;
370 }
371
372 void gPixmap::line(const gRegion &clip, ePoint start, ePoint dst, gColor color)
373 {
374         __u8 *srf8 = 0;
375         __u32 *srf32 = 0; 
376         int stride = surface->stride;
377         
378         if (clip.rects.empty())
379                 return;
380                 
381         __u32 col;
382         if (surface->bpp == 8)
383         {
384                 srf8 = (__u8*)surface->data;
385         } else if (surface->bpp == 32)
386         {
387                 srf32 = (__u32*)surface->data;
388                 
389                 if (surface->clut.data && color < surface->clut.colors)
390                         col=(surface->clut.data[color].a<<24)|(surface->clut.data[color].r<<16)|(surface->clut.data[color].g<<8)|(surface->clut.data[color].b);
391                 else
392                         col=0x10101*color;
393                 col^=0xFF000000;                        
394         }
395         
396         int xa = start.x(), ya = start.y(), xb = dst.x(), yb = dst.y();
397         int dx, dy, x, y, s1, s2, e, temp, swap, i;
398         dy=abs(yb-ya);
399         dx=abs(xb-xa);
400         s1=sgn(xb-xa);
401         s2=sgn(yb-ya);
402         x=xa;
403         y=ya;
404         if (dy>dx)
405         {
406                 temp=dx;
407                 dx=dy;
408                 dy=temp;
409                 swap=1;
410         } else
411                 swap=0;
412         e = 2*dy-dx;
413         
414         int lasthit = 0;
415         for(i=1; i<=dx; i++)
416         {
417                                 /* i don't like this clipping loop, but the only */
418                                 /* other choice i see is to calculate the intersections */
419                                 /* before iterating through the pixels. */
420                                 
421                                 /* one could optimize this because of the ordering */
422                                 /* of the bands. */
423                                 
424                 lasthit = 0;
425                 int a = lasthit;
426                 
427                         /* if last pixel was invisble, first check bounding box */
428                 if (a == -1)
429                 {
430                                 /* check if we just got into the bbox again */
431                         if (clip.extends.contains(x, y))
432                                 lasthit = a = 0;
433                         else
434                                 goto fail;
435                 } else if (!clip.rects[a].contains(x, y))
436                 {
437                         do
438                         {
439                                 ++a;
440                                 if (a == clip.rects.size())
441                                         a = 0;
442                                 if (a == lasthit)
443                                 {
444                                         goto fail;
445                                         lasthit = -1;
446                                 }
447                         } while (!clip.rects[a].contains(x, y));
448                         lasthit = a;
449                 }
450                 
451                 if (srf8)
452                         srf8[y * stride + x] = color;
453                 if (srf32)
454                         srf32[y * stride/4 + x] = col;
455 fail:
456                 while (e>=0)
457                 {
458                         if (swap==1) x+=s1;
459                         else y+=s2;
460                         e-=2*dx;
461                 }
462     if (swap==1)
463         y+=s2;
464                 else
465                         x+=s1;
466                 e+=2*dy;
467         }
468 }
469
470 gColor gPalette::findColor(const gRGB &rgb) const
471 {
472                 /* grayscale? */
473         if (!data)
474                 return (rgb.r + rgb.g + rgb.b) / 3;
475         
476         int difference=1<<30, best_choice=0;
477         for (int t=0; t<colors; t++)
478         {
479                 int ttd;
480                 int td=(signed)(rgb.r-data[t].r); td*=td; td*=(255-data[t].a);
481                 ttd=td;
482                 if (ttd>=difference)
483                         continue;
484                 td=(signed)(rgb.g-data[t].g); td*=td; td*=(255-data[t].a);
485                 ttd+=td;
486                 if (ttd>=difference)
487                         continue;
488                 td=(signed)(rgb.b-data[t].b); td*=td; td*=(255-data[t].a);
489                 ttd+=td;
490                 if (ttd>=difference)
491                         continue;
492                 td=(signed)(rgb.a-data[t].a); td*=td; td*=255;
493                 ttd+=td;
494                 if (ttd>=difference)
495                         continue;
496                 if (!ttd)
497                         return t;
498                 difference=ttd;
499                 best_choice=t;
500         }
501         return best_choice;
502 }
503
504 DEFINE_REF(gPixmap);
505
506 gPixmap::~gPixmap()
507 {
508 }
509
510 gPixmap::gPixmap(gSurface *surface): surface(surface)
511 {
512 }
513
514 gPixmap::gPixmap(eSize size, int bpp, int accel)
515 {
516         surface = new gSurface(size, bpp, accel);
517 }
518