| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "../SDL_internal.h" |
| |
| #ifndef SDL_blit_h_ |
| #define SDL_blit_h_ |
| |
| #include "SDL_cpuinfo.h" |
| #include "SDL_endian.h" |
| #include "SDL_surface.h" |
| |
| /* Table to do pixel byte expansion */ |
| extern Uint8* SDL_expand_byte[9]; |
| |
| /* 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_MOD 0x00000040 |
| #define SDL_COPY_MUL 0x00000080 |
| #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 (*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 */ |
| Uint32 dst_palette_version; |
| Uint32 src_palette_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 |
| |
| /* Load pixel of the specified format from a buffer and get its R-G-B values */ |
| #define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \ |
| { \ |
| r = SDL_expand_byte[fmt->Rloss][((Pixel&fmt->Rmask)>>fmt->Rshift)]; \ |
| g = SDL_expand_byte[fmt->Gloss][((Pixel&fmt->Gmask)>>fmt->Gshift)]; \ |
| b = SDL_expand_byte[fmt->Bloss][((Pixel&fmt->Bmask)>>fmt->Bshift)]; \ |
| } |
| #define RGB_FROM_RGB565(Pixel, r, g, b) \ |
| { \ |
| r = SDL_expand_byte[3][((Pixel&0xF800)>>11)]; \ |
| g = SDL_expand_byte[2][((Pixel&0x07E0)>>5)]; \ |
| b = SDL_expand_byte[3][(Pixel&0x001F)]; \ |
| } |
| #define RGB_FROM_RGB555(Pixel, r, g, b) \ |
| { \ |
| r = SDL_expand_byte[3][((Pixel&0x7C00)>>10)]; \ |
| g = SDL_expand_byte[3][((Pixel&0x03E0)>>5)]; \ |
| b = SDL_expand_byte[3][(Pixel&0x001F)]; \ |
| } |
| #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 1: \ |
| Pixel = *((Uint8 *)(buf)); \ |
| break; \ |
| \ |
| 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 = 0; /* stop gcc complaints */ \ |
| break; \ |
| } \ |
| } while (0) |
| |
| #define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \ |
| do { \ |
| switch (bpp) { \ |
| case 1: \ |
| Pixel = *((Uint8 *)(buf)); \ |
| RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| break; \ |
| \ |
| case 2: \ |
| Pixel = *((Uint16 *)(buf)); \ |
| RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \ |
| break; \ |
| \ |
| case 3: { \ |
| Pixel = 0; \ |
| 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: \ |
| /* stop gcc complaints */ \ |
| Pixel = 0; \ |
| r = g = b = 0; \ |
| 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)| \ |
| fmt->Amask; \ |
| } |
| #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 ARGB2101010_FROM_RGBA(Pixel, r, g, b, a) \ |
| { \ |
| r = r ? ((r << 2) | 0x3) : 0; \ |
| g = g ? ((g << 2) | 0x3) : 0; \ |
| b = b ? ((b << 2) | 0x3) : 0; \ |
| a = (a * 3) / 255; \ |
| Pixel = (a<<30)|(r<<20)|(g<<10)|b; \ |
| } |
| #define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ |
| { \ |
| switch (bpp) { \ |
| case 1: { \ |
| Uint8 _Pixel; \ |
| \ |
| PIXEL_FROM_RGB(_Pixel, fmt, r, g, b); \ |
| *((Uint8 *)(buf)) = _Pixel; \ |
| } \ |
| break; \ |
| \ |
| 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; \ |
| } \ |
| } |
| |
| /* FIXME: Should we rescale alpha into 0..255 here? */ |
| #define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ |
| { \ |
| r = SDL_expand_byte[fmt->Rloss][((Pixel&fmt->Rmask)>>fmt->Rshift)]; \ |
| g = SDL_expand_byte[fmt->Gloss][((Pixel&fmt->Gmask)>>fmt->Gshift)]; \ |
| b = SDL_expand_byte[fmt->Bloss][((Pixel&fmt->Bmask)>>fmt->Bshift)]; \ |
| a = SDL_expand_byte[fmt->Aloss][((Pixel&fmt->Amask)>>fmt->Ashift)]; \ |
| } |
| #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 RGBA_FROM_ARGB2101010(Pixel, r, g, b, a) \ |
| { \ |
| r = ((Pixel>>22)&0xFF); \ |
| g = ((Pixel>>12)&0xFF); \ |
| b = ((Pixel>>2)&0xFF); \ |
| a = SDL_expand_byte[6][(Pixel>>30)]; \ |
| } |
| #define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \ |
| do { \ |
| switch (bpp) { \ |
| case 1: \ |
| Pixel = *((Uint8 *)(buf)); \ |
| RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| break; \ |
| \ |
| case 2: \ |
| Pixel = *((Uint16 *)(buf)); \ |
| RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \ |
| break; \ |
| \ |
| case 3: { \ |
| Pixel = 0; \ |
| 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: \ |
| /* stop gcc complaints */ \ |
| Pixel = 0; \ |
| r = g = b = a = 0; \ |
| 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 1: { \ |
| Uint8 _pixel; \ |
| \ |
| PIXEL_FROM_RGBA(_pixel, fmt, r, g, b, a); \ |
| *((Uint8 *)(buf)) = _pixel; \ |
| } \ |
| break; \ |
| \ |
| 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 with an alpha value */ |
| #define ALPHA_BLEND_RGB(sR, sG, sB, A, dR, dG, dB) \ |
| do { \ |
| dR = (Uint8)((((int)(sR-dR)*(int)A)/255)+dR); \ |
| dG = (Uint8)((((int)(sG-dG)*(int)A)/255)+dG); \ |
| dB = (Uint8)((((int)(sB-dB)*(int)A)/255)+dB); \ |
| } while(0) |
| |
| |
| /* Blend the RGBA values of two pixels */ |
| #define ALPHA_BLEND_RGBA(sR, sG, sB, sA, dR, dG, dB, dA) \ |
| do { \ |
| dR = (Uint8)((((int)(sR-dR)*(int)sA)/255)+dR); \ |
| dG = (Uint8)((((int)(sG-dG)*(int)sA)/255)+dG); \ |
| dB = (Uint8)((((int)(sB-dB)*(int)sA)/255)+dB); \ |
| dA = (Uint8)((int)sA+dA-((int)sA*dA)/255); \ |
| } 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; /* fallthrough */ \ |
| case 7: pixel_copy_increment; /* fallthrough */ \ |
| case 6: pixel_copy_increment; /* fallthrough */ \ |
| case 5: pixel_copy_increment; /* fallthrough */ \ |
| case 4: pixel_copy_increment; /* fallthrough */ \ |
| case 3: pixel_copy_increment; /* fallthrough */ \ |
| case 2: pixel_copy_increment; /* fallthrough */ \ |
| case 1: pixel_copy_increment; /* fallthrough */ \ |
| } 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; /* fallthrough */ \ |
| case 3: pixel_copy_increment; /* fallthrough */ \ |
| case 2: pixel_copy_increment; /* fallthrough */ \ |
| case 1: pixel_copy_increment; /* fallthrough */ \ |
| } 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 & 4) { \ |
| pixel_copy_increment4; n -= 4; \ |
| } \ |
| if (n) { \ |
| n /= 8; \ |
| do { \ |
| pixel_copy_increment4; \ |
| 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: */ |
