src/video/SDL_blit.h
author Sam Lantinga <slouken@libsdl.org>
Wed, 15 Aug 2007 08:21:10 +0000
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Removed hermes since it's LGPL and not compatible with a commercial license. Prepping for using MMX and SSE intrinsics instead of inline assembly. .. except for memcpy equivalents which only get faster if they can exploit the parallelism of loading into multiple SIMD registers. :)
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 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 Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 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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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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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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{
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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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{
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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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{
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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 sw_blit;
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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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#define SDL_BLIT_ANY                0x00000000
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#define SDL_BLIT_MMX                0x00000001
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#define SDL_BLIT_SSE                0x00000002
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#define SDL_BLIT_ALTIVEC_PREFETCH   0x00000004
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#define SDL_BLIT_ALTIVEC_NOPREFETCH 0x00000008
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typedef struct SDL_BlitEntry
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{
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    Uint32 features;
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    SDL_loblit blit;
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} SDL_BlitEntry;
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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));			   \
0
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		break;							   \
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									   \
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		default:						   \
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			Pixel = 0; /* appease gcc */			   \
0
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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)			   \
0
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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));			   \
0
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		break;							   \
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									   \
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	        default:						   \
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		        Pixel = 0;	/* prevent gcc from complaining */ \
0
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		break;							   \
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   176
	}								   \
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	RGB_FROM_PIXEL(Pixel, fmt, r, g, b);				   \
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} while(0)
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   179
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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)|				\
0
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		((g>>fmt->Gloss)<<fmt->Gshift)|				\
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		((b>>fmt->Bloss)<<fmt->Bshift);				\
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   186
}
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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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   190
}
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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);			\
0
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   194
}
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#define RGB888_FROM_RGB(Pixel, r, g, b)					\
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   196
{									\
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	Pixel = (r<<16)|(g<<8)|b;					\
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   198
}
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   199
#define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) 				\
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   200
{									\
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   201
	switch (bpp) {							\
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		case 2: {						\
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			Uint16 Pixel;					\
0
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   204
									\
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			PIXEL_FROM_RGB(Pixel, fmt, r, g, b);		\
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			*((Uint16 *)(buf)) = Pixel;			\
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   207
		}							\
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   208
		break;							\
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   209
									\
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   210
		case 3: {						\
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   211
                        if(SDL_BYTEORDER == SDL_LIL_ENDIAN) {		\
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   212
			        *((buf)+fmt->Rshift/8) = r;		\
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   213
				*((buf)+fmt->Gshift/8) = g;		\
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   214
				*((buf)+fmt->Bshift/8) = b;		\
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   215
			} else {					\
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   216
			        *((buf)+2-fmt->Rshift/8) = r;		\
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   217
				*((buf)+2-fmt->Gshift/8) = g;		\
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   218
				*((buf)+2-fmt->Bshift/8) = b;		\
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   219
			}						\
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   220
		}							\
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   221
		break;							\
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   222
									\
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   223
		case 4: {						\
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   224
			Uint32 Pixel;					\
0
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   225
									\
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   226
			PIXEL_FROM_RGB(Pixel, fmt, r, g, b);		\
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   227
			*((Uint32 *)(buf)) = Pixel;			\
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   228
		}							\
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   229
		break;							\
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   230
	}								\
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   231
}
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   232
#define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask)		\
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   233
{									\
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   234
	switch (bpp) {							\
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   235
		case 2: {						\
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   236
			Uint16 *bufp;					\
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   237
			Uint16 Pixel;					\
0
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   238
									\
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   239
			bufp = (Uint16 *)buf;				\
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   240
			PIXEL_FROM_RGB(Pixel, fmt, r, g, b);		\
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   241
			*bufp = Pixel | (*bufp & Amask);		\
0
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   242
		}							\
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   243
		break;							\
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   244
									\
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   245
		case 3: {						\
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   246
                        if(SDL_BYTEORDER == SDL_LIL_ENDIAN) {		\
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   247
			        *((buf)+fmt->Rshift/8) = r;		\
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parents:
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   248
				*((buf)+fmt->Gshift/8) = g;		\
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diff changeset
   249
				*((buf)+fmt->Bshift/8) = b;		\
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   250
			} else {					\
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parents:
diff changeset
   251
			        *((buf)+2-fmt->Rshift/8) = r;		\
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   252
				*((buf)+2-fmt->Gshift/8) = g;		\
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parents:
diff changeset
   253
				*((buf)+2-fmt->Bshift/8) = b;		\
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diff changeset
   254
			}						\
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   255
		}							\
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   256
		break;							\
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   257
									\
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   258
		case 4: {						\
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   259
			Uint32 *bufp;					\
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   260
			Uint32 Pixel;					\
0
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   261
									\
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   262
			bufp = (Uint32 *)buf;				\
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   263
			PIXEL_FROM_RGB(Pixel, fmt, r, g, b);		\
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   264
			*bufp = Pixel | (*bufp & Amask);		\
0
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   265
		}							\
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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)				\
0
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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);						\
0
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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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}
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#define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a)			   \
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do {									   \
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	switch (bpp) {							   \
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		case 2:							   \
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			Pixel = *((Uint16 *)(buf));			   \
0
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		break;							   \
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									   \
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		case 3:	{/* FIXME: broken code (no alpha) */		   \
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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); \
0
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   317
			} else {					   \
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			        Pixel = (b[0] << 16) + (b[1] << 8) + b[2]; \
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   319
			}						   \
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		}							   \
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		break;							   \
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   322
									   \
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   323
		case 4:							   \
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   324
			Pixel = *((Uint32 *)(buf));			   \
0
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		break;							   \
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   326
									   \
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		default:						   \
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   328
		        Pixel = 0; /* stop gcc complaints */		   \
0
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   329
		break;							   \
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   330
	}								   \
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	RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a);			   \
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	Pixel &= ~fmt->Amask;						   \
0
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   333
} while(0)
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   334
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   335
/* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
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   336
#define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a)				\
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   337
{									\
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	Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)|				\
0
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   339
		((g>>fmt->Gloss)<<fmt->Gshift)|				\
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   340
		((b>>fmt->Bloss)<<fmt->Bshift)|				\
535
917cc5c56176 Fixed alpha blending bug (thanks Glenn!)
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diff changeset
   341
		((a>>fmt->Aloss)<<fmt->Ashift);				\
0
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   342
}
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   343
#define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a)			\
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   344
{									\
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   345
	switch (bpp) {							\
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   346
		case 2: {						\
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   347
			Uint16 Pixel;					\
0
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   348
									\
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   349
			PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a);	\
2651158f59b8 Enable altivec blitters on PowerPC Linux, and some fixes for recent
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			*((Uint16 *)(buf)) = Pixel;			\
0
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   351
		}							\
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   352
		break;							\
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   353
									\
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   354
		case 3: { /* FIXME: broken code (no alpha) */		\
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   355
                        if(SDL_BYTEORDER == SDL_LIL_ENDIAN) {		\
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diff changeset
   356
			        *((buf)+fmt->Rshift/8) = r;		\
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diff changeset
   357
				*((buf)+fmt->Gshift/8) = g;		\
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diff changeset
   358
				*((buf)+fmt->Bshift/8) = b;		\
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diff changeset
   359
			} else {					\
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diff changeset
   360
			        *((buf)+2-fmt->Rshift/8) = r;		\
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diff changeset
   361
				*((buf)+2-fmt->Gshift/8) = g;		\
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diff changeset
   362
				*((buf)+2-fmt->Bshift/8) = b;		\
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parents:
diff changeset
   363
			}						\
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diff changeset
   364
		}							\
74212992fb08 Initial revision
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diff changeset
   365
		break;							\
74212992fb08 Initial revision
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diff changeset
   366
									\
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   367
		case 4: {						\
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   368
			Uint32 Pixel;					\
0
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   369
									\
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   370
			PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a);	\
2651158f59b8 Enable altivec blitters on PowerPC Linux, and some fixes for recent
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   371
			*((Uint32 *)(buf)) = Pixel;			\
0
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diff changeset
   372
		}							\
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diff changeset
   373
		break;							\
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diff changeset
   374
	}								\
74212992fb08 Initial revision
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diff changeset
   375
}
74212992fb08 Initial revision
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diff changeset
   376
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   377
/* Blend the RGB values of two Pixels based on a source alpha value */
0
74212992fb08 Initial revision
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parents:
diff changeset
   378
#define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB)	\
74212992fb08 Initial revision
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diff changeset
   379
do {						\
74212992fb08 Initial revision
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diff changeset
   380
	dR = (((sR-dR)*(A))>>8)+dR;		\
74212992fb08 Initial revision
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parents:
diff changeset
   381
	dG = (((sG-dG)*(A))>>8)+dG;		\
74212992fb08 Initial revision
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parents:
diff changeset
   382
	dB = (((sB-dB)*(A))>>8)+dB;		\
74212992fb08 Initial revision
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parents:
diff changeset
   383
} while(0)
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parents:
diff changeset
   384
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Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   385
/* Blend the RGB values of two Pixels based on a source alpha value */
1047
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
   386
#define ACCURATE_ALPHA_BLEND(sR, sG, sB, sA, dR, dG, dB)	\
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   387
do {						\
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
   388
    unsigned tR, tG, tB, tA; \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   389
    tA = 255 - sA; \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
   390
    tR = 1 + (sR * sA) + (dR * tA); \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
   391
    dR = (tR + (tR >> 8)) >> 8; \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
   392
    tG = 1 + (sG * sA) + (dG * tA); \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
   393
    dG = (tG + (tG >> 8)) >> 8; \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
   394
    tB = 1 + (sB * sA) + (dB * tA); \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
   395
    dB = (tB + (tB >> 8)) >> 8; \
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
   396
} while(0)
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
   397
ffaaf7ecf685 Altivec-optimized blitters!
Ryan C. Gordon <icculus@icculus.org>
parents: 769
diff changeset
   398
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   399
/* This is a very useful loop for optimizing blitters */
553
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
Sam Lantinga <slouken@libsdl.org>
parents: 535
diff changeset
   400
#if defined(_MSC_VER) && (_MSC_VER == 1300)
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
Sam Lantinga <slouken@libsdl.org>
parents: 535
diff changeset
   401
/* There's a bug in the Visual C++ 7 optimizer when compiling this code */
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
Sam Lantinga <slouken@libsdl.org>
parents: 535
diff changeset
   402
#else
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   403
#define USE_DUFFS_LOOP
553
417f8709e648 There's a bug in the VC7 optimizer relating to the duff loop optimization
Sam Lantinga <slouken@libsdl.org>
parents: 535
diff changeset
   404
#endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   405
#ifdef USE_DUFFS_LOOP
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   406
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   407
/* 8-times unrolled loop */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   408
#define DUFFS_LOOP8(pixel_copy_increment, width)			\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   409
{ int n = (width+7)/8;							\
91
e85e03f195b4 From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
   410
	switch (width & 7) {						\
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   411
	case 0: do {	pixel_copy_increment;				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   412
	case 7:		pixel_copy_increment;				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   413
	case 6:		pixel_copy_increment;				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   414
	case 5:		pixel_copy_increment;				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   415
	case 4:		pixel_copy_increment;				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   416
	case 3:		pixel_copy_increment;				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   417
	case 2:		pixel_copy_increment;				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   418
	case 1:		pixel_copy_increment;				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   419
		} while ( --n > 0 );					\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   420
	}								\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   421
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   422
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   423
/* 4-times unrolled loop */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   424
#define DUFFS_LOOP4(pixel_copy_increment, width)			\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   425
{ int n = (width+3)/4;							\
91
e85e03f195b4 From: "Markus F.X.J. Oberhumer"
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
   426
	switch (width & 3) {						\
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   427
	case 0: do {	pixel_copy_increment;				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   428
	case 3:		pixel_copy_increment;				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   429
	case 2:		pixel_copy_increment;				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   430
	case 1:		pixel_copy_increment;				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   431
		} while ( --n > 0 );					\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   432
	}								\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   433
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   434
689
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   435
/* 2 - times unrolled loop */
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   436
#define DUFFS_LOOP_DOUBLE2(pixel_copy_increment,			\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   437
				double_pixel_copy_increment, width)	\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   438
{ int n, w = width;							\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   439
	if( w & 1 ) {							\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   440
	    pixel_copy_increment;					\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   441
	    w--;							\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   442
	}								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   443
	if ( w > 0 )	{						\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   444
	    n = ( w + 2) / 4;						\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   445
	    switch( w & 2 ) {						\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   446
	    case 0: do {	double_pixel_copy_increment;		\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   447
	    case 2:		double_pixel_copy_increment;		\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   448
		    } while ( --n > 0 );					\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   449
	    }								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   450
	}								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   451
}
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   452
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   453
/* 2 - times unrolled loop 4 pixels */
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   454
#define DUFFS_LOOP_QUATRO2(pixel_copy_increment,			\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   455
				double_pixel_copy_increment,		\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   456
				quatro_pixel_copy_increment, width)	\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   457
{ int n, w = width;								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   458
        if(w & 1) {							\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   459
	  pixel_copy_increment;						\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   460
	  w--;								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   461
	}								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   462
	if(w & 2) {							\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   463
	  double_pixel_copy_increment;					\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   464
	  w -= 2;							\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   465
	}								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   466
	if ( w > 0 ) {							\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   467
	    n = ( w + 7 ) / 8;						\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   468
	    switch( w & 4 ) {						\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   469
	    case 0: do {	quatro_pixel_copy_increment;		\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   470
	    case 4:		quatro_pixel_copy_increment;		\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   471
		    } while ( --n > 0 );					\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   472
	    }								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   473
	}								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   474
}
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   475
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   476
/* Use the 8-times version of the loop by default */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   477
#define DUFFS_LOOP(pixel_copy_increment, width)				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   478
	DUFFS_LOOP8(pixel_copy_increment, width)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   479
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   480
#else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   481
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   482
/* Don't use Duff's device to unroll loops */
689
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   483
#define DUFFS_LOOP_DOUBLE2(pixel_copy_increment,			\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   484
			 double_pixel_copy_increment, width)		\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   485
{ int n = width;								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   486
    if( n & 1 ) {							\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   487
	pixel_copy_increment;						\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   488
	n--;								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   489
    }									\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   490
    n=n>>1;								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   491
    for(; n > 0; --n) {   						\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   492
	double_pixel_copy_increment;					\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   493
    }									\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   494
}
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   495
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   496
/* Don't use Duff's device to unroll loops */
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   497
#define DUFFS_LOOP_QUATRO2(pixel_copy_increment,			\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   498
				double_pixel_copy_increment,		\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   499
				quatro_pixel_copy_increment, width)	\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   500
{ int n = width;								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   501
        if(n & 1) {							\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   502
	  pixel_copy_increment;						\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   503
	  n--;								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   504
	}								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   505
	if(n & 2) {							\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   506
	  double_pixel_copy_increment;					\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   507
	  n -= 2;							\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   508
	}								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   509
	n=n>>2;								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   510
	for(; n > 0; --n) {   						\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   511
	  quatro_pixel_copy_increment;					\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   512
        }								\
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   513
}
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   514
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 553
diff changeset
   515
/* Don't use Duff's device to unroll loops */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   516
#define DUFFS_LOOP(pixel_copy_increment, width)				\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   517
{ int n;								\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   518
	for ( n=width; n > 0; --n ) {					\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   519
		pixel_copy_increment;					\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   520
	}								\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   521
}
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   522
#define DUFFS_LOOP8(pixel_copy_increment, width)			\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   523
	DUFFS_LOOP(pixel_copy_increment, width)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   524
#define DUFFS_LOOP4(pixel_copy_increment, width)			\
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   525
	DUFFS_LOOP(pixel_copy_increment, width)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   526
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   527
#endif /* USE_DUFFS_LOOP */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   528
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   529
/* Prevent Visual C++ 6.0 from printing out stupid warnings */
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#if defined(_MSC_VER) && (_MSC_VER >= 600)
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#pragma warning(disable: 4550)
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#endif
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#endif /* _SDL_blit_h */
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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/* vi: set ts=4 sw=4 expandtab: */