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author | Wade Brainerd <wadetb@gmail.com> | 2009-10-31 16:28:11 (GMT) |
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committer | Wade Brainerd <wadetb@gmail.com> | 2009-10-31 16:28:11 (GMT) |
commit | 40517089bb1fe92b120ea43c248a20d88c5c0fdb (patch) | |
tree | 7e720509670253e2c83e3b9a82716c25c53e0e6c /pygame/surface.h | |
parent | 122710eab16e9554db1ac602cf84807d4012baef (diff) | |
parent | a8c615cc33b289a95ce861d3c3168f4a86451c12 (diff) |
Merge branch 'master' of git://git.sugarlabs.org/colors/videopaint
Conflicts:
colors.py
Diffstat (limited to 'pygame/surface.h')
-rwxr-xr-x | pygame/surface.h | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/pygame/surface.h b/pygame/surface.h new file mode 100755 index 0000000..a2f49ee --- /dev/null +++ b/pygame/surface.h @@ -0,0 +1,274 @@ +/* + pygame - Python Game Library + Copyright (C) 2000-2001 Pete Shinners + Copyright (C) 2007 Marcus von Appen + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this library; if not, write to the Free + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + + Pete Shinners + pete@shinners.org +*/ + +#ifndef SURFACE_H +#define SURFACE_H + +#include <SDL.h> +#include "pygame.h" + +#define PYGAME_BLEND_ADD 0x1 +#define PYGAME_BLEND_SUB 0x2 +#define PYGAME_BLEND_MULT 0x3 +#define PYGAME_BLEND_MIN 0x4 +#define PYGAME_BLEND_MAX 0x5 + +#define PYGAME_BLEND_RGB_ADD 0x1 +#define PYGAME_BLEND_RGB_SUB 0x2 +#define PYGAME_BLEND_RGB_MULT 0x3 +#define PYGAME_BLEND_RGB_MIN 0x4 +#define PYGAME_BLEND_RGB_MAX 0x5 + +#define PYGAME_BLEND_RGBA_ADD 0x6 +#define PYGAME_BLEND_RGBA_SUB 0x7 +#define PYGAME_BLEND_RGBA_MULT 0x8 +#define PYGAME_BLEND_RGBA_MIN 0x9 +#define PYGAME_BLEND_RGBA_MAX 0x10 + + + + + +#define GET_PIXEL(pxl, bpp, source) \ + switch (bpp) \ + { \ + case 2: \ + pxl = *((Uint16 *) (source)); \ + break; \ + case 4: \ + pxl = *((Uint32 *) (source)); \ + break; \ + default: \ + { \ + Uint8 *b = (Uint8 *) source; \ + pxl = (SDL_BYTEORDER == SDL_LIL_ENDIAN) ? \ + b[0] + (b[1] << 8) + (b[2] << 16) : \ + (b[0] << 16) + (b[1] << 8) + b[2]; \ + } \ + break; \ + } + +#define GET_PIXELVALS(_sR, _sG, _sB, _sA, px, fmt) \ + _sR = ((px & fmt->Rmask) >> fmt->Rshift); \ + _sR = (_sR << fmt->Rloss) + (_sR >> (8 - (fmt->Rloss << 1))); \ + _sG = ((px & fmt->Gmask) >> fmt->Gshift); \ + _sG = (_sG << fmt->Gloss) + (_sG >> (8 - (fmt->Gloss << 1))); \ + _sB = ((px & fmt->Bmask) >> fmt->Bshift); \ + _sB = (_sB << fmt->Bloss) + (_sB >> (8 - (fmt->Bloss << 1))); \ + if (fmt->Amask) \ + { \ + _sA = ((px & fmt->Amask) >> fmt->Ashift); \ + _sA = (_sA << fmt->Aloss) + (_sA >> (8 - (fmt->Aloss << 1))); \ + } \ + else \ + { \ + _sA = 255; \ + } + +#define GET_PIXELVALS_1(sr, sg, sb, sa, _src, _fmt) \ + sr = _fmt->palette->colors[*((Uint8 *) (_src))].r; \ + sg = _fmt->palette->colors[*((Uint8 *) (_src))].g; \ + sb = _fmt->palette->colors[*((Uint8 *) (_src))].b; \ + sa = 255; + + + + + + + +#define CREATE_PIXEL(buf, r, g, b, a, bp, ft) \ + switch (bp) \ + { \ + case 2: \ + *((Uint16 *) (buf)) = \ + ((r >> ft->Rloss) << ft->Rshift) | \ + ((g >> ft->Gloss) << ft->Gshift) | \ + ((b >> ft->Bloss) << ft->Bshift) | \ + ((a >> ft->Aloss) << ft->Ashift); \ + break; \ + case 4: \ + *((Uint32 *) (buf)) = \ + ((r >> ft->Rloss) << ft->Rshift) | \ + ((g >> ft->Gloss) << ft->Gshift) | \ + ((b >> ft->Bloss) << ft->Bshift) | \ + ((a >> ft->Aloss) << ft->Ashift); \ + break; \ + } + +/* Pretty good idea from Tom Duff :-). */ +#define LOOP_UNROLLED4(code, n, width) \ + n = (width + 3) / 4; \ + switch (width & 3) \ + { \ + case 0: do { code; \ + case 3: code; \ + case 2: code; \ + case 1: code; \ + } while (--n > 0); \ + } + +/* Used in the srcbpp == dstbpp == 1 blend functions */ +#define REPEAT_3(code) \ + code; \ + code; \ + code; + +#define REPEAT_4(code) \ + code; \ + code; \ + code; \ + code; + + +#define BLEND_ADD(tmp, sR, sG, sB, sA, dR, dG, dB, dA) \ + tmp = dR + sR; dR = (tmp <= 255 ? tmp : 255); \ + tmp = dG + sG; dG = (tmp <= 255 ? tmp : 255); \ + tmp = dB + sB; dB = (tmp <= 255 ? tmp : 255); + +#define BLEND_SUB(tmp, sR, sG, sB, sA, dR, dG, dB, dA) \ + tmp = dR - sR; dR = (tmp >= 0 ? tmp : 0); \ + tmp = dG - sG; dG = (tmp >= 0 ? tmp : 0); \ + tmp = dB - sB; dB = (tmp >= 0 ? tmp : 0); + +#define BLEND_MULT(sR, sG, sB, sA, dR, dG, dB, dA) \ + dR = (dR && sR) ? (dR * sR) >> 8 : 0; \ + dG = (dG && sG) ? (dG * sG) >> 8 : 0; \ + dB = (dB && sB) ? (dB * sB) >> 8 : 0; + +#define BLEND_MIN(sR, sG, sB, sA, dR, dG, dB, dA) \ + if(sR < dR) { dR = sR; } \ + if(sG < dG) { dG = sG; } \ + if(sB < dB) { dB = sB; } + +#define BLEND_MAX(sR, sG, sB, sA, dR, dG, dB, dA) \ + if(sR > dR) { dR = sR; } \ + if(sG > dG) { dG = sG; } \ + if(sB > dB) { dB = sB; } + + + + + + +#define BLEND_RGBA_ADD(tmp, sR, sG, sB, sA, dR, dG, dB, dA) \ + tmp = dR + sR; dR = (tmp <= 255 ? tmp : 255); \ + tmp = dG + sG; dG = (tmp <= 255 ? tmp : 255); \ + tmp = dB + sB; dB = (tmp <= 255 ? tmp : 255); \ + tmp = dA + sA; dA = (tmp <= 255 ? tmp : 255); + +#define BLEND_RGBA_SUB(tmp, sR, sG, sB, sA, dR, dG, dB, dA) \ + tmp = dR - sR; dR = (tmp >= 0 ? tmp : 0); \ + tmp = dG - sG; dG = (tmp >= 0 ? tmp : 0); \ + tmp = dB - sB; dB = (tmp >= 0 ? tmp : 0); \ + tmp = dA - sA; dA = (tmp >= 0 ? tmp : 0); + +#define BLEND_RGBA_MULT(sR, sG, sB, sA, dR, dG, dB, dA) \ + dR = (dR && sR) ? (dR * sR) >> 8 : 0; \ + dG = (dG && sG) ? (dG * sG) >> 8 : 0; \ + dB = (dB && sB) ? (dB * sB) >> 8 : 0; \ + dA = (dA && sA) ? (dA * sA) >> 8 : 0; + +#define BLEND_RGBA_MIN(sR, sG, sB, sA, dR, dG, dB, dA) \ + if(sR < dR) { dR = sR; } \ + if(sG < dG) { dG = sG; } \ + if(sB < dB) { dB = sB; } \ + if(sA < dA) { dA = sA; } + +#define BLEND_RGBA_MAX(sR, sG, sB, sA, dR, dG, dB, dA) \ + if(sR > dR) { dR = sR; } \ + if(sG > dG) { dG = sG; } \ + if(sB > dB) { dB = sB; } \ + if(sA > dA) { dA = sA; } + + + + + + + + + + + +#if 1 +/* Choose an alpha blend equation. If the sign is preserved on a right shift + * then use a specialized, faster, equation. Otherwise a more general form, + * where all additions are done before the shift, is needed. +*/ +#if (-1 >> 1) < 0 +#define ALPHA_BLEND_COMP(sC, dC, dA) ((((sC - dC) * sA + sC) >> 8) + dC) +#else +#define ALPHA_BLEND_COMP(sC, dC, dA) (((dC << 8) + (sC - dC) * sA + sC) >> 8) +#endif + +#define ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB, dA) \ + do { \ + if (dA) \ + { \ + dR = ALPHA_BLEND_COMP(sR, dR, dA); \ + dG = ALPHA_BLEND_COMP(sG, dG, dA); \ + dB = ALPHA_BLEND_COMP(sB, dB, dA); \ + dA = sA + dA - ((sA * dA) / 255); \ + } \ + else \ + { \ + dR = sR; \ + dG = sG; \ + dB = sB; \ + dA = sA; \ + } \ + } while(0) +#elif 0 +#define ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB, dA) \ + do { \ + if(sA){ \ + if(dA && sA < 255){ \ + int dContrib = dA*(255 - sA)/255; \ + dA = sA+dA - ((sA*dA)/255); \ + dR = (dR*dContrib + sR*sA)/dA; \ + dG = (dG*dContrib + sG*sA)/dA; \ + dB = (dB*dContrib + sB*sA)/dA; \ + }else{ \ + dR = sR; \ + dG = sG; \ + dB = sB; \ + dA = sA; \ + } \ + } \ + } while(0) +#endif + +int +surface_fill_blend (SDL_Surface *surface, SDL_Rect *rect, Uint32 color, + int blendargs); + +int +pygame_AlphaBlit (SDL_Surface * src, SDL_Rect * srcrect, + SDL_Surface * dst, SDL_Rect * dstrect, int the_args); + +int +pygame_Blit (SDL_Surface * src, SDL_Rect * srcrect, + SDL_Surface * dst, SDL_Rect * dstrect, int the_args); + +#endif /* SURFACE_H */ |