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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#ifdef SAVE_RCSID
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static char rcsid =
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"@(#) $Id$";
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#endif
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#ifndef _SDL_blit_h
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#define _SDL_blit_h
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#include "SDL_endian.h"
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/* The structure passed to the low level blit functions */
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typedef struct {
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Uint8 *s_pixels;
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int s_width;
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int s_height;
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int s_skip;
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Uint8 *d_pixels;
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int d_width;
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int d_height;
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int d_skip;
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void *aux_data;
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SDL_PixelFormat *src;
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Uint8 *table;
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SDL_PixelFormat *dst;
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} SDL_BlitInfo;
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/* The type definition for the low level blit functions */
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typedef void (*SDL_loblit)(SDL_BlitInfo *info);
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/* This is the private info structure for software accelerated blits */
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struct private_swaccel {
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SDL_loblit blit;
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void *aux_data;
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};
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/* Blit mapping definition */
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typedef struct SDL_BlitMap {
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SDL_Surface *dst;
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int identity;
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Uint8 *table;
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SDL_blit hw_blit;
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SDL_blit sw_blit;
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struct private_hwaccel *hw_data;
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struct private_swaccel *sw_data;
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/* the version count matches the destination; mismatch indicates
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an invalid mapping */
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unsigned int format_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_{0,1,N,A}.c */
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extern SDL_loblit SDL_CalculateBlit0(SDL_Surface *surface, int complex);
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extern SDL_loblit SDL_CalculateBlit1(SDL_Surface *surface, int complex);
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extern SDL_loblit SDL_CalculateBlitN(SDL_Surface *surface, int complex);
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extern SDL_loblit SDL_CalculateAlphaBlit(SDL_Surface *surface, int complex);
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/*
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* Useful macros for blitting routines
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*/
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#define FORMAT_EQUAL(A, B) \
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((A)->BitsPerPixel == (B)->BitsPerPixel \
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&& ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask))
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/* Load pixel of the specified format from a buffer and get its R-G-B values */
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/* FIXME: rescale values to 0..255 here? */
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#define RGB_FROM_PIXEL(pixel, fmt, r, g, b) \
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{ \
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r = (((pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \
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g = (((pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \
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b = (((pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \
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}
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#define RGB_FROM_RGB565(pixel, r, g, b) \
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{ \
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r = (((pixel&0xF800)>>11)<<3); \
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g = (((pixel&0x07E0)>>5)<<2); \
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b = ((pixel&0x001F)<<3); \
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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 = (((pixel&0x7C00)>>10)<<3); \
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g = (((pixel&0x03E0)>>5)<<3); \
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b = ((pixel&0x001F)<<3); \
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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 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; /* appease gcc */ \
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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 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; /* prevent gcc from complaining */ \
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break; \
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} \
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RGB_FROM_PIXEL(pixel, fmt, r, g, b); \
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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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}
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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 ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \
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{ \
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switch (bpp) { \
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case 2: { \
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Uint16 pixel; \
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\
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PIXEL_FROM_RGB(pixel, fmt, r, g, b); \
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*((Uint16 *)(buf)) = pixel; \
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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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Uint32 pixel; \
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\
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PIXEL_FROM_RGB(pixel, fmt, r, g, b); \
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*((Uint32 *)(buf)) = pixel; \
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} \
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break; \
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} \
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}
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#define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \
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{ \
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switch (bpp) { \
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case 2: { \
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Uint16 *bufp; \
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Uint16 pixel; \
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\
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bufp = (Uint16 *)buf; \
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PIXEL_FROM_RGB(pixel, fmt, r, g, b); \
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*bufp = pixel | (*bufp & Amask); \
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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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Uint32 *bufp; \
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Uint32 pixel; \
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\
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bufp = (Uint32 *)buf; \
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PIXEL_FROM_RGB(pixel, fmt, r, g, b); \
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*bufp = pixel | (*bufp & Amask); \
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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 = ((pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \
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g = ((pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \
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b = ((pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \
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a = ((pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \
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}
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#define RGBA_FROM_8888(pixel, fmt, r, g, b, a) \
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{ \
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r = (pixel&fmt->Rmask)>>fmt->Rshift; \
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g = (pixel&fmt->Gmask)>>fmt->Gshift; \
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b = (pixel&fmt->Bmask)>>fmt->Bshift; \
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a = (pixel&fmt->Amask)>>fmt->Ashift; \
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}
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#define RGBA_FROM_RGBA8888(pixel, r, g, b, a) \
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{ \
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r = (pixel>>24); \
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g = ((pixel>>16)&0xFF); \
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b = ((pixel>>8)&0xFF); \
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a = (pixel&0xFF); \
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}
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#define RGBA_FROM_ARGB8888(pixel, r, g, b, a) \
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{ \
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r = ((pixel>>16)&0xFF); \
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g = ((pixel>>8)&0xFF); \
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b = (pixel&0xFF); \
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a = (pixel>>24); \
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}
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#define RGBA_FROM_ABGR8888(pixel, r, g, b, a) \
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{ \
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r = (pixel&0xFF); \
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g = ((pixel>>8)&0xFF); \
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b = ((pixel>>16)&0xFF); \
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a = (pixel>>24); \
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}
|
slouken@0
|
298 |
#define DISEMBLE_RGBA(buf, bpp, fmt, pixel, r, g, b, a) \
|
slouken@0
|
299 |
do { \
|
slouken@0
|
300 |
switch (bpp) { \
|
slouken@0
|
301 |
case 2: \
|
slouken@0
|
302 |
pixel = *((Uint16 *)(buf)); \
|
slouken@0
|
303 |
break; \
|
slouken@0
|
304 |
\
|
slouken@0
|
305 |
case 3: {/* FIXME: broken code (no alpha) */ \
|
slouken@0
|
306 |
Uint8 *b = (Uint8 *)buf; \
|
slouken@0
|
307 |
if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
|
slouken@0
|
308 |
pixel = b[0] + (b[1] << 8) + (b[2] << 16); \
|
slouken@0
|
309 |
} else { \
|
slouken@0
|
310 |
pixel = (b[0] << 16) + (b[1] << 8) + b[2]; \
|
slouken@0
|
311 |
} \
|
slouken@0
|
312 |
} \
|
slouken@0
|
313 |
break; \
|
slouken@0
|
314 |
\
|
slouken@0
|
315 |
case 4: \
|
slouken@0
|
316 |
pixel = *((Uint32 *)(buf)); \
|
slouken@0
|
317 |
break; \
|
slouken@0
|
318 |
\
|
slouken@0
|
319 |
default: \
|
slouken@0
|
320 |
pixel = 0; /* stop gcc complaints */ \
|
slouken@0
|
321 |
break; \
|
slouken@0
|
322 |
} \
|
slouken@0
|
323 |
RGBA_FROM_PIXEL(pixel, fmt, r, g, b, a); \
|
slouken@0
|
324 |
pixel &= ~fmt->Amask; \
|
slouken@0
|
325 |
} while(0)
|
slouken@0
|
326 |
|
slouken@0
|
327 |
/* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
|
slouken@0
|
328 |
#define PIXEL_FROM_RGBA(pixel, fmt, r, g, b, a) \
|
slouken@0
|
329 |
{ \
|
slouken@0
|
330 |
pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
|
slouken@0
|
331 |
((g>>fmt->Gloss)<<fmt->Gshift)| \
|
slouken@0
|
332 |
((b>>fmt->Bloss)<<fmt->Bshift)| \
|
slouken@535
|
333 |
((a>>fmt->Aloss)<<fmt->Ashift); \
|
slouken@0
|
334 |
}
|
slouken@0
|
335 |
#define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \
|
slouken@0
|
336 |
{ \
|
slouken@0
|
337 |
switch (bpp) { \
|
slouken@0
|
338 |
case 2: { \
|
slouken@0
|
339 |
Uint16 pixel; \
|
slouken@0
|
340 |
\
|
slouken@0
|
341 |
PIXEL_FROM_RGBA(pixel, fmt, r, g, b, a); \
|
slouken@0
|
342 |
*((Uint16 *)(buf)) = pixel; \
|
slouken@0
|
343 |
} \
|
slouken@0
|
344 |
break; \
|
slouken@0
|
345 |
\
|
slouken@0
|
346 |
case 3: { /* FIXME: broken code (no alpha) */ \
|
slouken@0
|
347 |
if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
|
slouken@0
|
348 |
*((buf)+fmt->Rshift/8) = r; \
|
slouken@0
|
349 |
*((buf)+fmt->Gshift/8) = g; \
|
slouken@0
|
350 |
*((buf)+fmt->Bshift/8) = b; \
|
slouken@0
|
351 |
} else { \
|
slouken@0
|
352 |
*((buf)+2-fmt->Rshift/8) = r; \
|
slouken@0
|
353 |
*((buf)+2-fmt->Gshift/8) = g; \
|
slouken@0
|
354 |
*((buf)+2-fmt->Bshift/8) = b; \
|
slouken@0
|
355 |
} \
|
slouken@0
|
356 |
} \
|
slouken@0
|
357 |
break; \
|
slouken@0
|
358 |
\
|
slouken@0
|
359 |
case 4: { \
|
slouken@0
|
360 |
Uint32 pixel; \
|
slouken@0
|
361 |
\
|
slouken@0
|
362 |
PIXEL_FROM_RGBA(pixel, fmt, r, g, b, a); \
|
slouken@0
|
363 |
*((Uint32 *)(buf)) = pixel; \
|
slouken@0
|
364 |
} \
|
slouken@0
|
365 |
break; \
|
slouken@0
|
366 |
} \
|
slouken@0
|
367 |
}
|
slouken@0
|
368 |
|
slouken@0
|
369 |
/* Blend the RGB values of two pixels based on a source alpha value */
|
slouken@0
|
370 |
#define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \
|
slouken@0
|
371 |
do { \
|
slouken@0
|
372 |
dR = (((sR-dR)*(A))>>8)+dR; \
|
slouken@0
|
373 |
dG = (((sG-dG)*(A))>>8)+dG; \
|
slouken@0
|
374 |
dB = (((sB-dB)*(A))>>8)+dB; \
|
slouken@0
|
375 |
} while(0)
|
slouken@0
|
376 |
|
slouken@0
|
377 |
/* This is a very useful loop for optimizing blitters */
|
slouken@553
|
378 |
#if defined(_MSC_VER) && (_MSC_VER == 1300)
|
slouken@553
|
379 |
/* There's a bug in the Visual C++ 7 optimizer when compiling this code */
|
slouken@553
|
380 |
#else
|
slouken@0
|
381 |
#define USE_DUFFS_LOOP
|
slouken@553
|
382 |
#endif
|
slouken@0
|
383 |
#ifdef USE_DUFFS_LOOP
|
slouken@0
|
384 |
|
slouken@0
|
385 |
/* 8-times unrolled loop */
|
slouken@0
|
386 |
#define DUFFS_LOOP8(pixel_copy_increment, width) \
|
slouken@0
|
387 |
{ int n = (width+7)/8; \
|
slouken@91
|
388 |
switch (width & 7) { \
|
slouken@0
|
389 |
case 0: do { pixel_copy_increment; \
|
slouken@0
|
390 |
case 7: pixel_copy_increment; \
|
slouken@0
|
391 |
case 6: pixel_copy_increment; \
|
slouken@0
|
392 |
case 5: pixel_copy_increment; \
|
slouken@0
|
393 |
case 4: pixel_copy_increment; \
|
slouken@0
|
394 |
case 3: pixel_copy_increment; \
|
slouken@0
|
395 |
case 2: pixel_copy_increment; \
|
slouken@0
|
396 |
case 1: pixel_copy_increment; \
|
slouken@0
|
397 |
} while ( --n > 0 ); \
|
slouken@0
|
398 |
} \
|
slouken@0
|
399 |
}
|
slouken@0
|
400 |
|
slouken@0
|
401 |
/* 4-times unrolled loop */
|
slouken@0
|
402 |
#define DUFFS_LOOP4(pixel_copy_increment, width) \
|
slouken@0
|
403 |
{ int n = (width+3)/4; \
|
slouken@91
|
404 |
switch (width & 3) { \
|
slouken@0
|
405 |
case 0: do { pixel_copy_increment; \
|
slouken@0
|
406 |
case 3: pixel_copy_increment; \
|
slouken@0
|
407 |
case 2: pixel_copy_increment; \
|
slouken@0
|
408 |
case 1: pixel_copy_increment; \
|
slouken@0
|
409 |
} while ( --n > 0 ); \
|
slouken@0
|
410 |
} \
|
slouken@0
|
411 |
}
|
slouken@0
|
412 |
|
slouken@689
|
413 |
/* 2 - times unrolled loop */
|
slouken@689
|
414 |
#define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \
|
slouken@689
|
415 |
double_pixel_copy_increment, width) \
|
slouken@689
|
416 |
{ int n, w = width; \
|
slouken@689
|
417 |
if( w & 1 ) { \
|
slouken@689
|
418 |
pixel_copy_increment; \
|
slouken@689
|
419 |
w--; \
|
slouken@689
|
420 |
} \
|
slouken@689
|
421 |
if ( w > 0 ) { \
|
slouken@689
|
422 |
n = ( w + 2) / 4; \
|
slouken@689
|
423 |
switch( w & 2 ) { \
|
slouken@689
|
424 |
case 0: do { double_pixel_copy_increment; \
|
slouken@689
|
425 |
case 2: double_pixel_copy_increment; \
|
slouken@689
|
426 |
} while ( --n > 0 ); \
|
slouken@689
|
427 |
} \
|
slouken@689
|
428 |
} \
|
slouken@689
|
429 |
}
|
slouken@689
|
430 |
|
slouken@689
|
431 |
/* 2 - times unrolled loop 4 pixels */
|
slouken@689
|
432 |
#define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \
|
slouken@689
|
433 |
double_pixel_copy_increment, \
|
slouken@689
|
434 |
quatro_pixel_copy_increment, width) \
|
slouken@689
|
435 |
{ int n, w = width; \
|
slouken@689
|
436 |
if(w & 1) { \
|
slouken@689
|
437 |
pixel_copy_increment; \
|
slouken@689
|
438 |
w--; \
|
slouken@689
|
439 |
} \
|
slouken@689
|
440 |
if(w & 2) { \
|
slouken@689
|
441 |
double_pixel_copy_increment; \
|
slouken@689
|
442 |
w -= 2; \
|
slouken@689
|
443 |
} \
|
slouken@689
|
444 |
if ( w > 0 ) { \
|
slouken@689
|
445 |
n = ( w + 7 ) / 8; \
|
slouken@689
|
446 |
switch( w & 4 ) { \
|
slouken@689
|
447 |
case 0: do { quatro_pixel_copy_increment; \
|
slouken@689
|
448 |
case 4: quatro_pixel_copy_increment; \
|
slouken@689
|
449 |
} while ( --n > 0 ); \
|
slouken@689
|
450 |
} \
|
slouken@689
|
451 |
} \
|
slouken@689
|
452 |
}
|
slouken@689
|
453 |
|
slouken@0
|
454 |
/* Use the 8-times version of the loop by default */
|
slouken@0
|
455 |
#define DUFFS_LOOP(pixel_copy_increment, width) \
|
slouken@0
|
456 |
DUFFS_LOOP8(pixel_copy_increment, width)
|
slouken@0
|
457 |
|
slouken@0
|
458 |
#else
|
slouken@0
|
459 |
|
slouken@0
|
460 |
/* Don't use Duff's device to unroll loops */
|
slouken@689
|
461 |
#define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \
|
slouken@689
|
462 |
double_pixel_copy_increment, width) \
|
slouken@689
|
463 |
{ int n = width; \
|
slouken@689
|
464 |
if( n & 1 ) { \
|
slouken@689
|
465 |
pixel_copy_increment; \
|
slouken@689
|
466 |
n--; \
|
slouken@689
|
467 |
} \
|
slouken@689
|
468 |
n=n>>1; \
|
slouken@689
|
469 |
for(; n > 0; --n) { \
|
slouken@689
|
470 |
double_pixel_copy_increment; \
|
slouken@689
|
471 |
} \
|
slouken@689
|
472 |
}
|
slouken@689
|
473 |
|
slouken@689
|
474 |
/* Don't use Duff's device to unroll loops */
|
slouken@689
|
475 |
#define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \
|
slouken@689
|
476 |
double_pixel_copy_increment, \
|
slouken@689
|
477 |
quatro_pixel_copy_increment, width) \
|
slouken@689
|
478 |
{ int n = width; \
|
slouken@689
|
479 |
if(n & 1) { \
|
slouken@689
|
480 |
pixel_copy_increment; \
|
slouken@689
|
481 |
n--; \
|
slouken@689
|
482 |
} \
|
slouken@689
|
483 |
if(n & 2) { \
|
slouken@689
|
484 |
double_pixel_copy_increment; \
|
slouken@689
|
485 |
n -= 2; \
|
slouken@689
|
486 |
} \
|
slouken@689
|
487 |
n=n>>2; \
|
slouken@689
|
488 |
for(; n > 0; --n) { \
|
slouken@689
|
489 |
quatro_pixel_copy_increment; \
|
slouken@689
|
490 |
} \
|
slouken@689
|
491 |
}
|
slouken@689
|
492 |
|
slouken@689
|
493 |
/* Don't use Duff's device to unroll loops */
|
slouken@0
|
494 |
#define DUFFS_LOOP(pixel_copy_increment, width) \
|
slouken@0
|
495 |
{ int n; \
|
slouken@0
|
496 |
for ( n=width; n > 0; --n ) { \
|
slouken@0
|
497 |
pixel_copy_increment; \
|
slouken@0
|
498 |
} \
|
slouken@0
|
499 |
}
|
slouken@0
|
500 |
#define DUFFS_LOOP8(pixel_copy_increment, width) \
|
slouken@0
|
501 |
DUFFS_LOOP(pixel_copy_increment, width)
|
slouken@0
|
502 |
#define DUFFS_LOOP4(pixel_copy_increment, width) \
|
slouken@0
|
503 |
DUFFS_LOOP(pixel_copy_increment, width)
|
slouken@0
|
504 |
|
slouken@0
|
505 |
#endif /* USE_DUFFS_LOOP */
|
slouken@0
|
506 |
|
slouken@0
|
507 |
/* Prevent Visual C++ 6.0 from printing out stupid warnings */
|
slouken@0
|
508 |
#if defined(_MSC_VER) && (_MSC_VER >= 600)
|
slouken@0
|
509 |
#pragma warning(disable: 4550)
|
slouken@0
|
510 |
#endif
|
slouken@0
|
511 |
|
slouken@0
|
512 |
#endif /* _SDL_blit_h */
|