2015-06-21 15:33:46 +00:00
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/*
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Simple DirectMedia Layer
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2019-01-05 06:01:14 +00:00
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Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
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2015-06-21 15:33:46 +00:00
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../SDL_internal.h"
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2016-11-21 05:34:54 +00:00
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#ifndef SDL_blit_h_
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#define SDL_blit_h_
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2015-06-21 15:33:46 +00:00
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#include "SDL_cpuinfo.h"
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#include "SDL_endian.h"
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#include "SDL_surface.h"
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/* Table to do pixel byte expansion */
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extern Uint8* SDL_expand_byte[9];
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/* SDL blit copy flags */
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#define SDL_COPY_MODULATE_COLOR 0x00000001
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#define SDL_COPY_MODULATE_ALPHA 0x00000002
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#define SDL_COPY_BLEND 0x00000010
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#define SDL_COPY_ADD 0x00000020
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#define SDL_COPY_MOD 0x00000040
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#define SDL_COPY_COLORKEY 0x00000100
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#define SDL_COPY_NEAREST 0x00000200
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#define SDL_COPY_RLE_DESIRED 0x00001000
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#define SDL_COPY_RLE_COLORKEY 0x00002000
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#define SDL_COPY_RLE_ALPHAKEY 0x00004000
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#define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY)
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/* SDL blit CPU flags */
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#define SDL_CPU_ANY 0x00000000
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#define SDL_CPU_MMX 0x00000001
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#define SDL_CPU_3DNOW 0x00000002
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#define SDL_CPU_SSE 0x00000004
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#define SDL_CPU_SSE2 0x00000008
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#define SDL_CPU_ALTIVEC_PREFETCH 0x00000010
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#define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020
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typedef struct
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{
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Uint8 *src;
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int src_w, src_h;
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int src_pitch;
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int src_skip;
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Uint8 *dst;
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int dst_w, dst_h;
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int dst_pitch;
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int dst_skip;
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SDL_PixelFormat *src_fmt;
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SDL_PixelFormat *dst_fmt;
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Uint8 *table;
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int flags;
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Uint32 colorkey;
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Uint8 r, g, b, a;
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} SDL_BlitInfo;
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2017-08-14 04:09:00 +00:00
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typedef void (*SDL_BlitFunc) (SDL_BlitInfo *info);
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2015-06-21 15:33:46 +00:00
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typedef struct
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{
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Uint32 src_format;
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Uint32 dst_format;
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int flags;
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int cpu;
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SDL_BlitFunc func;
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} SDL_BlitFuncEntry;
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/* Blit mapping definition */
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typedef struct SDL_BlitMap
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{
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SDL_Surface *dst;
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int identity;
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SDL_blit blit;
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void *data;
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SDL_BlitInfo info;
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/* the version count matches the destination; mismatch indicates
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an invalid mapping */
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Uint32 dst_palette_version;
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Uint32 src_palette_version;
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} SDL_BlitMap;
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/* Functions found in SDL_blit.c */
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extern int SDL_CalculateBlit(SDL_Surface * surface);
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/* Functions found in SDL_blit_*.c */
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extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface);
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extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface);
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extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface);
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extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface);
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/*
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* Useful macros for blitting routines
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*/
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#if defined(__GNUC__)
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#define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v
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#elif defined(_MSC_VER)
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#define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v
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#else
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#define DECLARE_ALIGNED(t,v,a) t v
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#endif
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/* Load pixel of the specified format from a buffer and get its R-G-B values */
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#define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \
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{ \
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r = SDL_expand_byte[fmt->Rloss][((Pixel&fmt->Rmask)>>fmt->Rshift)]; \
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g = SDL_expand_byte[fmt->Gloss][((Pixel&fmt->Gmask)>>fmt->Gshift)]; \
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b = SDL_expand_byte[fmt->Bloss][((Pixel&fmt->Bmask)>>fmt->Bshift)]; \
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}
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#define RGB_FROM_RGB565(Pixel, r, g, b) \
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2018-10-01 18:29:11 +00:00
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{ \
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2015-06-21 15:33:46 +00:00
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r = SDL_expand_byte[3][((Pixel&0xF800)>>11)]; \
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g = SDL_expand_byte[2][((Pixel&0x07E0)>>5)]; \
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b = SDL_expand_byte[3][(Pixel&0x001F)]; \
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}
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#define RGB_FROM_RGB555(Pixel, r, g, b) \
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{ \
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r = SDL_expand_byte[3][((Pixel&0x7C00)>>10)]; \
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g = SDL_expand_byte[3][((Pixel&0x03E0)>>5)]; \
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b = SDL_expand_byte[3][(Pixel&0x001F)]; \
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}
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#define RGB_FROM_RGB888(Pixel, r, g, b) \
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{ \
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r = ((Pixel&0xFF0000)>>16); \
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g = ((Pixel&0xFF00)>>8); \
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b = (Pixel&0xFF); \
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}
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#define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \
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do { \
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switch (bpp) { \
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case 1: \
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Pixel = *((Uint8 *)(buf)); \
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break; \
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\
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case 2: \
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Pixel = *((Uint16 *)(buf)); \
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break; \
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\
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case 3: { \
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Uint8 *B = (Uint8 *)(buf); \
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if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
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} else { \
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Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
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} \
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} \
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break; \
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\
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case 4: \
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Pixel = *((Uint32 *)(buf)); \
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break; \
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\
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default: \
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Pixel = 0; /* stop gcc complaints */ \
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break; \
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} \
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} while (0)
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#define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \
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do { \
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switch (bpp) { \
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case 1: \
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Pixel = *((Uint8 *)(buf)); \
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RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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break; \
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\
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case 2: \
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Pixel = *((Uint16 *)(buf)); \
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RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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break; \
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\
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case 3: { \
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Pixel = 0; \
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if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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r = *((buf)+fmt->Rshift/8); \
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g = *((buf)+fmt->Gshift/8); \
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b = *((buf)+fmt->Bshift/8); \
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} else { \
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r = *((buf)+2-fmt->Rshift/8); \
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g = *((buf)+2-fmt->Gshift/8); \
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b = *((buf)+2-fmt->Bshift/8); \
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} \
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} \
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break; \
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\
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case 4: \
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Pixel = *((Uint32 *)(buf)); \
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RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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break; \
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\
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default: \
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/* stop gcc complaints */ \
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Pixel = 0; \
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r = g = b = 0; \
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break; \
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} \
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} while (0)
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/* Assemble R-G-B values into a specified pixel format and store them */
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#define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \
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{ \
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Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
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((g>>fmt->Gloss)<<fmt->Gshift)| \
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((b>>fmt->Bloss)<<fmt->Bshift)| \
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fmt->Amask; \
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}
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#define RGB565_FROM_RGB(Pixel, r, g, b) \
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{ \
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Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \
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}
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#define RGB555_FROM_RGB(Pixel, r, g, b) \
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{ \
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Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \
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}
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#define RGB888_FROM_RGB(Pixel, r, g, b) \
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{ \
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Pixel = (r<<16)|(g<<8)|b; \
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}
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#define ARGB8888_FROM_RGBA(Pixel, r, g, b, a) \
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{ \
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Pixel = (a<<24)|(r<<16)|(g<<8)|b; \
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}
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#define RGBA8888_FROM_RGBA(Pixel, r, g, b, a) \
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{ \
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Pixel = (r<<24)|(g<<16)|(b<<8)|a; \
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}
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#define ABGR8888_FROM_RGBA(Pixel, r, g, b, a) \
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{ \
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Pixel = (a<<24)|(b<<16)|(g<<8)|r; \
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}
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#define BGRA8888_FROM_RGBA(Pixel, r, g, b, a) \
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{ \
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Pixel = (b<<24)|(g<<16)|(r<<8)|a; \
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}
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#define ARGB2101010_FROM_RGBA(Pixel, r, g, b, a) \
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{ \
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r = r ? ((r << 2) | 0x3) : 0; \
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g = g ? ((g << 2) | 0x3) : 0; \
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b = b ? ((b << 2) | 0x3) : 0; \
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a = (a * 3) / 255; \
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Pixel = (a<<30)|(r<<20)|(g<<10)|b; \
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}
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#define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \
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{ \
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switch (bpp) { \
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case 1: { \
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2018-10-01 18:29:11 +00:00
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Uint8 _Pixel; \
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2015-06-21 15:33:46 +00:00
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\
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2018-10-01 18:29:11 +00:00
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PIXEL_FROM_RGB(_Pixel, fmt, r, g, b); \
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*((Uint8 *)(buf)) = _Pixel; \
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2015-06-21 15:33:46 +00:00
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} \
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break; \
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\
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case 2: { \
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2018-10-01 18:29:11 +00:00
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Uint16 _Pixel; \
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2015-06-21 15:33:46 +00:00
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\
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2018-10-01 18:29:11 +00:00
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PIXEL_FROM_RGB(_Pixel, fmt, r, g, b); \
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*((Uint16 *)(buf)) = _Pixel; \
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2015-06-21 15:33:46 +00:00
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} \
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break; \
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\
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case 3: { \
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if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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*((buf)+fmt->Rshift/8) = r; \
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*((buf)+fmt->Gshift/8) = g; \
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*((buf)+fmt->Bshift/8) = b; \
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} else { \
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*((buf)+2-fmt->Rshift/8) = r; \
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*((buf)+2-fmt->Gshift/8) = g; \
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*((buf)+2-fmt->Bshift/8) = b; \
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} \
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} \
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break; \
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\
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case 4: { \
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2018-10-01 18:29:11 +00:00
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Uint32 _Pixel; \
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2015-06-21 15:33:46 +00:00
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\
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2018-10-01 18:29:11 +00:00
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PIXEL_FROM_RGB(_Pixel, fmt, r, g, b); \
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*((Uint32 *)(buf)) = _Pixel; \
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2015-06-21 15:33:46 +00:00
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} \
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break; \
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} \
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}
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/* FIXME: Should we rescale alpha into 0..255 here? */
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#define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \
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{ \
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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 { \
|
2017-01-08 00:51:48 +00:00
|
|
|
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); \
|
2015-06-21 15:33:46 +00:00
|
|
|
} while(0)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Blend the RGBA values of two pixels */
|
|
|
|
|
#define ALPHA_BLEND_RGBA(sR, sG, sB, sA, dR, dG, dB, dA) \
|
|
|
|
|
do { \
|
2017-01-08 00:51:48 +00:00
|
|
|
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); \
|
2017-01-05 16:16:39 +00:00
|
|
|
dA = (Uint8)((int)sA+dA-((int)sA*dA)/255); \
|
2015-06-21 15:33:46 +00:00
|
|
|
} 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) { \
|
2017-09-06 11:32:30 +00:00
|
|
|
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 */ \
|
2015-06-21 15:33:46 +00:00
|
|
|
} while ( --n > 0 ); \
|
|
|
|
|
} \
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* 4-times unrolled loop */
|
|
|
|
|
#define DUFFS_LOOP4(pixel_copy_increment, width) \
|
|
|
|
|
{ int n = (width+3)/4; \
|
|
|
|
|
switch (width & 3) { \
|
2017-09-10 19:49:41 +00:00
|
|
|
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 */ \
|
2015-06-21 15:33:46 +00:00
|
|
|
} 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
|
|
|
|
|
|
2016-11-21 05:34:54 +00:00
|
|
|
#endif /* SDL_blit_h_ */
|
2015-06-21 15:33:46 +00:00
|
|
|
|
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|
