Mercurial > sdl-ios-xcode
view src/video/SDL_blit.h @ 5154:8ef640410ac9
SDL doesn't actually support the physical/logical palette split anymore.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 01 Feb 2011 21:51:09 -0800 |
parents | e743b9c3f6d6 |
children | d72793305335 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2010 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" #ifndef _SDL_blit_h #define _SDL_blit_h #ifdef __MINGW32__ #include <_mingw.h> #endif #if defined(__MINGW32__) && defined(__MINGW64_VERSION_MAJOR) #include <intrin.h> #else #ifdef __MMX__ #include <mmintrin.h> #endif #ifdef __3dNOW__ #include <mm3dnow.h> #endif #ifdef __SSE__ #include <xmmintrin.h> #endif #ifdef __SSE2__ #include <emmintrin.h> #endif #endif #include "SDL_cpuinfo.h" #include "SDL_endian.h" #include "SDL_video.h" /* SDL blit copy flags */ #define SDL_COPY_MODULATE_COLOR 0x00000001 #define SDL_COPY_MODULATE_ALPHA 0x00000002 #define SDL_COPY_BLEND 0x00000010 #define SDL_COPY_ADD 0x00000020 #define SDL_COPY_COLORKEY 0x00000100 #define SDL_COPY_NEAREST 0x00000200 #define SDL_COPY_RLE_DESIRED 0x00001000 #define SDL_COPY_RLE_COLORKEY 0x00002000 #define SDL_COPY_RLE_ALPHAKEY 0x00004000 #define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY) /* SDL blit CPU flags */ #define SDL_CPU_ANY 0x00000000 #define SDL_CPU_MMX 0x00000001 #define SDL_CPU_3DNOW 0x00000002 #define SDL_CPU_SSE 0x00000004 #define SDL_CPU_SSE2 0x00000008 #define SDL_CPU_ALTIVEC_PREFETCH 0x00000010 #define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020 typedef struct { Uint8 *src; int src_w, src_h; int src_pitch; int src_skip; Uint8 *dst; int dst_w, dst_h; int dst_pitch; int dst_skip; SDL_PixelFormat *src_fmt; SDL_PixelFormat *dst_fmt; Uint8 *table; int flags; Uint32 colorkey; Uint8 r, g, b, a; } SDL_BlitInfo; typedef void (SDLCALL * SDL_BlitFunc) (SDL_BlitInfo * info); typedef struct { Uint32 src_format; Uint32 dst_format; int flags; int cpu; SDL_BlitFunc func; } SDL_BlitFuncEntry; /* Blit mapping definition */ typedef struct SDL_BlitMap { SDL_Surface *dst; int identity; SDL_blit blit; void *data; SDL_BlitInfo info; /* the version count matches the destination; mismatch indicates an invalid mapping */ unsigned int format_version; } SDL_BlitMap; /* Functions found in SDL_blit.c */ extern int SDL_CalculateBlit(SDL_Surface * surface); /* Functions found in SDL_blit_*.c */ extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface); extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface); extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface); extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface); /* * Useful macros for blitting routines */ #if defined(__GNUC__) #define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v #elif defined(_MSC_VER) #define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v #else #define DECLARE_ALIGNED(t,v,a) t v #endif #define FORMAT_EQUAL(A, B) \ ((A)->BitsPerPixel == (B)->BitsPerPixel \ && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask)) /* Load pixel of the specified format from a buffer and get its R-G-B values */ /* FIXME: rescale values to 0..255 here? */ #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ { \ r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \ g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \ b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \ } #define RGB_FROM_RGB565(Pixel, r, g, b) \ { \ r = (((Pixel&0xF800)>>11)<<3); \ g = (((Pixel&0x07E0)>>5)<<2); \ b = ((Pixel&0x001F)<<3); \ } #define RGB_FROM_RGB555(Pixel, r, g, b) \ { \ r = (((Pixel&0x7C00)>>10)<<3); \ g = (((Pixel&0x03E0)>>5)<<3); \ b = ((Pixel&0x001F)<<3); \ } #define RGB_FROM_RGB888(Pixel, r, g, b) \ { \ r = ((Pixel&0xFF0000)>>16); \ g = ((Pixel&0xFF00)>>8); \ b = (Pixel&0xFF); \ } #define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \ do { \ switch (bpp) { \ case 2: \ Pixel = *((Uint16 *)(buf)); \ break; \ \ case 3: { \ Uint8 *B = (Uint8 *)(buf); \ if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \ } else { \ Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \ } \ } \ break; \ \ case 4: \ Pixel = *((Uint32 *)(buf)); \ break; \ \ default: \ Pixel; /* stop gcc complaints */ \ break; \ } \ } while (0) #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ do { \ switch (bpp) { \ case 2: \ Pixel = *((Uint16 *)(buf)); \ RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ break; \ \ case 3: { \ if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ r = *((buf)+fmt->Rshift/8); \ g = *((buf)+fmt->Gshift/8); \ b = *((buf)+fmt->Bshift/8); \ } else { \ r = *((buf)+2-fmt->Rshift/8); \ g = *((buf)+2-fmt->Gshift/8); \ b = *((buf)+2-fmt->Bshift/8); \ } \ } \ break; \ \ case 4: \ Pixel = *((Uint32 *)(buf)); \ RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ break; \ \ default: \ Pixel; /* stop gcc complaints */ \ break; \ } \ } while (0) /* Assemble R-G-B values into a specified pixel format and store them */ #define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \ { \ Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ ((g>>fmt->Gloss)<<fmt->Gshift)| \ ((b>>fmt->Bloss)<<fmt->Bshift); \ } #define RGB565_FROM_RGB(Pixel, r, g, b) \ { \ Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \ } #define RGB555_FROM_RGB(Pixel, r, g, b) \ { \ Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \ } #define RGB888_FROM_RGB(Pixel, r, g, b) \ { \ Pixel = (r<<16)|(g<<8)|b; \ } #define ARGB8888_FROM_RGBA(Pixel, r, g, b, a) \ { \ Pixel = (a<<24)|(r<<16)|(g<<8)|b; \ } #define RGBA8888_FROM_RGBA(Pixel, r, g, b, a) \ { \ Pixel = (r<<24)|(g<<16)|(b<<8)|a; \ } #define ABGR8888_FROM_RGBA(Pixel, r, g, b, a) \ { \ Pixel = (a<<24)|(b<<16)|(g<<8)|r; \ } #define BGRA8888_FROM_RGBA(Pixel, r, g, b, a) \ { \ Pixel = (b<<24)|(g<<16)|(r<<8)|a; \ } #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ { \ switch (bpp) { \ case 2: { \ Uint16 Pixel; \ \ PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ *((Uint16 *)(buf)) = Pixel; \ } \ break; \ \ case 3: { \ if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ *((buf)+fmt->Rshift/8) = r; \ *((buf)+fmt->Gshift/8) = g; \ *((buf)+fmt->Bshift/8) = b; \ } else { \ *((buf)+2-fmt->Rshift/8) = r; \ *((buf)+2-fmt->Gshift/8) = g; \ *((buf)+2-fmt->Bshift/8) = b; \ } \ } \ break; \ \ case 4: { \ Uint32 Pixel; \ \ PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ *((Uint32 *)(buf)) = Pixel; \ } \ break; \ } \ } #define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \ { \ switch (bpp) { \ case 2: { \ Uint16 *bufp; \ Uint16 Pixel; \ \ bufp = (Uint16 *)buf; \ PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ *bufp = Pixel | (*bufp & Amask); \ } \ break; \ \ case 3: { \ if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ *((buf)+fmt->Rshift/8) = r; \ *((buf)+fmt->Gshift/8) = g; \ *((buf)+fmt->Bshift/8) = b; \ } else { \ *((buf)+2-fmt->Rshift/8) = r; \ *((buf)+2-fmt->Gshift/8) = g; \ *((buf)+2-fmt->Bshift/8) = b; \ } \ } \ break; \ \ case 4: { \ Uint32 *bufp; \ Uint32 Pixel; \ \ bufp = (Uint32 *)buf; \ PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \ *bufp = Pixel | (*bufp & Amask); \ } \ break; \ } \ } /* FIXME: Should we rescale alpha into 0..255 here? */ #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ { \ r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \ g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \ b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \ a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \ } #define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \ { \ r = (Pixel&fmt->Rmask)>>fmt->Rshift; \ g = (Pixel&fmt->Gmask)>>fmt->Gshift; \ b = (Pixel&fmt->Bmask)>>fmt->Bshift; \ a = (Pixel&fmt->Amask)>>fmt->Ashift; \ } #define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \ { \ r = (Pixel>>24); \ g = ((Pixel>>16)&0xFF); \ b = ((Pixel>>8)&0xFF); \ a = (Pixel&0xFF); \ } #define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \ { \ r = ((Pixel>>16)&0xFF); \ g = ((Pixel>>8)&0xFF); \ b = (Pixel&0xFF); \ a = (Pixel>>24); \ } #define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \ { \ r = (Pixel&0xFF); \ g = ((Pixel>>8)&0xFF); \ b = ((Pixel>>16)&0xFF); \ a = (Pixel>>24); \ } #define RGBA_FROM_BGRA8888(Pixel, r, g, b, a) \ { \ r = ((Pixel>>8)&0xFF); \ g = ((Pixel>>16)&0xFF); \ b = (Pixel>>24); \ a = (Pixel&0xFF); \ } #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ do { \ switch (bpp) { \ case 2: \ Pixel = *((Uint16 *)(buf)); \ RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ break; \ \ case 3: { \ if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ r = *((buf)+fmt->Rshift/8); \ g = *((buf)+fmt->Gshift/8); \ b = *((buf)+fmt->Bshift/8); \ } else { \ r = *((buf)+2-fmt->Rshift/8); \ g = *((buf)+2-fmt->Gshift/8); \ b = *((buf)+2-fmt->Bshift/8); \ } \ a = 0xFF; \ } \ break; \ \ case 4: \ Pixel = *((Uint32 *)(buf)); \ RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ break; \ \ default: \ Pixel; /* stop gcc complaints */ \ break; \ } \ } while (0) /* FIXME: this isn't correct, especially for Alpha (maximum != 255) */ #define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \ { \ Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \ ((g>>fmt->Gloss)<<fmt->Gshift)| \ ((b>>fmt->Bloss)<<fmt->Bshift)| \ ((a>>fmt->Aloss)<<fmt->Ashift); \ } #define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \ { \ switch (bpp) { \ case 2: { \ Uint16 Pixel; \ \ PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ *((Uint16 *)(buf)) = Pixel; \ } \ break; \ \ case 3: { \ if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \ *((buf)+fmt->Rshift/8) = r; \ *((buf)+fmt->Gshift/8) = g; \ *((buf)+fmt->Bshift/8) = b; \ } else { \ *((buf)+2-fmt->Rshift/8) = r; \ *((buf)+2-fmt->Gshift/8) = g; \ *((buf)+2-fmt->Bshift/8) = b; \ } \ } \ break; \ \ case 4: { \ Uint32 Pixel; \ \ PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \ *((Uint32 *)(buf)) = Pixel; \ } \ break; \ } \ } /* Blend the RGB values of two Pixels based on a source alpha value */ #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ do { \ dR = ((((int)(sR-dR)*(int)A)/255)+dR); \ dG = ((((int)(sG-dG)*(int)A)/255)+dG); \ dB = ((((int)(sB-dB)*(int)A)/255)+dB); \ } while(0) /* This is a very useful loop for optimizing blitters */ #if defined(_MSC_VER) && (_MSC_VER == 1300) /* There's a bug in the Visual C++ 7 optimizer when compiling this code */ #else #define USE_DUFFS_LOOP #endif #ifdef USE_DUFFS_LOOP /* 8-times unrolled loop */ #define DUFFS_LOOP8(pixel_copy_increment, width) \ { int n = (width+7)/8; \ switch (width & 7) { \ case 0: do { pixel_copy_increment; \ case 7: pixel_copy_increment; \ case 6: pixel_copy_increment; \ case 5: pixel_copy_increment; \ case 4: pixel_copy_increment; \ case 3: pixel_copy_increment; \ case 2: pixel_copy_increment; \ case 1: pixel_copy_increment; \ } while ( --n > 0 ); \ } \ } /* 4-times unrolled loop */ #define DUFFS_LOOP4(pixel_copy_increment, width) \ { int n = (width+3)/4; \ switch (width & 3) { \ case 0: do { pixel_copy_increment; \ case 3: pixel_copy_increment; \ case 2: pixel_copy_increment; \ case 1: pixel_copy_increment; \ } while (--n > 0); \ } \ } /* Use the 8-times version of the loop by default */ #define DUFFS_LOOP(pixel_copy_increment, width) \ DUFFS_LOOP8(pixel_copy_increment, width) /* Special version of Duff's device for even more optimization */ #define DUFFS_LOOP_124(pixel_copy_increment1, \ pixel_copy_increment2, \ pixel_copy_increment4, width) \ { int n = width; \ if (n & 1) { \ pixel_copy_increment1; n -= 1; \ } \ if (n & 2) { \ pixel_copy_increment2; n -= 2; \ } \ if (n) { \ n = (n+7)/ 8; \ switch (n & 4) { \ case 0: do { pixel_copy_increment4; \ case 4: pixel_copy_increment4; \ } while (--n > 0); \ } \ } \ } #else /* Don't use Duff's device to unroll loops */ #define DUFFS_LOOP(pixel_copy_increment, width) \ { int n; \ for ( n=width; n > 0; --n ) { \ pixel_copy_increment; \ } \ } #define DUFFS_LOOP8(pixel_copy_increment, width) \ DUFFS_LOOP(pixel_copy_increment, width) #define DUFFS_LOOP4(pixel_copy_increment, width) \ DUFFS_LOOP(pixel_copy_increment, width) #define DUFFS_LOOP_124(pixel_copy_increment1, \ pixel_copy_increment2, \ pixel_copy_increment4, width) \ DUFFS_LOOP(pixel_copy_increment1, width) #endif /* USE_DUFFS_LOOP */ /* Prevent Visual C++ 6.0 from printing out stupid warnings */ #if defined(_MSC_VER) && (_MSC_VER >= 600) #pragma warning(disable: 4550) #endif #endif /* _SDL_blit_h */ /* vi: set ts=4 sw=4 expandtab: */