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diff --git a/distrib/sdl-1.2.15/src/video/SDL_blit.h b/distrib/sdl-1.2.15/src/video/SDL_blit.h
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+/*
+ SDL - Simple DirectMedia Layer
+ Copyright (C) 1997-2012 Sam Lantinga
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+ Sam Lantinga
+ slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#ifndef _SDL_blit_h
+#define _SDL_blit_h
+
+#include "SDL_endian.h"
+
+/* The structure passed to the low level blit functions */
+typedef struct {
+ Uint8 *s_pixels;
+ int s_width;
+ int s_height;
+ int s_skip;
+ Uint8 *d_pixels;
+ int d_width;
+ int d_height;
+ int d_skip;
+ void *aux_data;
+ SDL_PixelFormat *src;
+ Uint8 *table;
+ SDL_PixelFormat *dst;
+} SDL_BlitInfo;
+
+/* The type definition for the low level blit functions */
+typedef void (*SDL_loblit)(SDL_BlitInfo *info);
+
+/* This is the private info structure for software accelerated blits */
+struct private_swaccel {
+ SDL_loblit blit;
+ void *aux_data;
+};
+
+/* Blit mapping definition */
+typedef struct SDL_BlitMap {
+ SDL_Surface *dst;
+ int identity;
+ Uint8 *table;
+ SDL_blit hw_blit;
+ SDL_blit sw_blit;
+ struct private_hwaccel *hw_data;
+ struct private_swaccel *sw_data;
+
+ /* the version count matches the destination; mismatch indicates
+ an invalid mapping */
+ unsigned int format_version;
+} SDL_BlitMap;
+
+
+/* Functions found in SDL_blit.c */
+extern int SDL_CalculateBlit(SDL_Surface *surface);
+
+/* Functions found in SDL_blit_{0,1,N,A}.c */
+extern SDL_loblit SDL_CalculateBlit0(SDL_Surface *surface, int complex);
+extern SDL_loblit SDL_CalculateBlit1(SDL_Surface *surface, int complex);
+extern SDL_loblit SDL_CalculateBlitN(SDL_Surface *surface, int complex);
+extern SDL_loblit SDL_CalculateAlphaBlit(SDL_Surface *surface, int complex);
+
+/*
+ * Useful macros for blitting routines
+ */
+
+#define FORMAT_EQUAL(A, B) \
+ ((A)->BitsPerPixel == (B)->BitsPerPixel \
+ && ((A)->Rmask == (B)->Rmask) && ((A)->Amask == (B)->Amask))
+
+/* Load pixel of the specified format from a buffer and get its R-G-B values */
+/* FIXME: rescale values to 0..255 here? */
+#define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \
+{ \
+ r = (((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss); \
+ g = (((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss); \
+ b = (((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss); \
+}
+#define RGB_FROM_RGB565(Pixel, r, g, b) \
+{ \
+ r = (((Pixel&0xF800)>>11)<<3); \
+ g = (((Pixel&0x07E0)>>5)<<2); \
+ b = ((Pixel&0x001F)<<3); \
+}
+#define RGB_FROM_RGB555(Pixel, r, g, b) \
+{ \
+ r = (((Pixel&0x7C00)>>10)<<3); \
+ g = (((Pixel&0x03E0)>>5)<<3); \
+ b = ((Pixel&0x001F)<<3); \
+}
+#define RGB_FROM_RGB888(Pixel, r, g, b) \
+{ \
+ r = ((Pixel&0xFF0000)>>16); \
+ g = ((Pixel&0xFF00)>>8); \
+ b = (Pixel&0xFF); \
+}
+#define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \
+do { \
+ switch (bpp) { \
+ case 2: \
+ Pixel = *((Uint16 *)(buf)); \
+ break; \
+ \
+ case 3: { \
+ Uint8 *B = (Uint8 *)(buf); \
+ if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
+ Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
+ } else { \
+ Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
+ } \
+ } \
+ break; \
+ \
+ case 4: \
+ Pixel = *((Uint32 *)(buf)); \
+ break; \
+ \
+ default: \
+ Pixel = 0; /* appease gcc */ \
+ break; \
+ } \
+} while(0)
+
+#define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \
+do { \
+ switch (bpp) { \
+ case 2: \
+ Pixel = *((Uint16 *)(buf)); \
+ break; \
+ \
+ case 3: { \
+ Uint8 *B = (Uint8 *)buf; \
+ if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
+ Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
+ } else { \
+ Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
+ } \
+ } \
+ break; \
+ \
+ case 4: \
+ Pixel = *((Uint32 *)(buf)); \
+ break; \
+ \
+ default: \
+ Pixel = 0; /* prevent gcc from complaining */ \
+ break; \
+ } \
+ RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
+} while(0)
+
+/* Assemble R-G-B values into a specified pixel format and store them */
+#ifdef __NDS__ /* FIXME */
+#define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \
+{ \
+ Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
+ ((g>>fmt->Gloss)<<fmt->Gshift)| \
+ ((b>>fmt->Bloss)<<fmt->Bshift) | (1<<15); \
+}
+#else
+#define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \
+{ \
+ Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
+ ((g>>fmt->Gloss)<<fmt->Gshift)| \
+ ((b>>fmt->Bloss)<<fmt->Bshift); \
+}
+#endif /* __NDS__ FIXME */
+#define RGB565_FROM_RGB(Pixel, r, g, b) \
+{ \
+ Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \
+}
+#define RGB555_FROM_RGB(Pixel, r, g, b) \
+{ \
+ Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \
+}
+#define RGB888_FROM_RGB(Pixel, r, g, b) \
+{ \
+ Pixel = (r<<16)|(g<<8)|b; \
+}
+#define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \
+{ \
+ switch (bpp) { \
+ case 2: { \
+ Uint16 Pixel; \
+ \
+ PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
+ *((Uint16 *)(buf)) = Pixel; \
+ } \
+ break; \
+ \
+ case 3: { \
+ if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
+ *((buf)+fmt->Rshift/8) = r; \
+ *((buf)+fmt->Gshift/8) = g; \
+ *((buf)+fmt->Bshift/8) = b; \
+ } else { \
+ *((buf)+2-fmt->Rshift/8) = r; \
+ *((buf)+2-fmt->Gshift/8) = g; \
+ *((buf)+2-fmt->Bshift/8) = b; \
+ } \
+ } \
+ break; \
+ \
+ case 4: { \
+ Uint32 Pixel; \
+ \
+ PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
+ *((Uint32 *)(buf)) = Pixel; \
+ } \
+ break; \
+ } \
+}
+#define ASSEMBLE_RGB_AMASK(buf, bpp, fmt, r, g, b, Amask) \
+{ \
+ switch (bpp) { \
+ case 2: { \
+ Uint16 *bufp; \
+ Uint16 Pixel; \
+ \
+ bufp = (Uint16 *)buf; \
+ PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
+ *bufp = Pixel | (*bufp & Amask); \
+ } \
+ break; \
+ \
+ case 3: { \
+ if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
+ *((buf)+fmt->Rshift/8) = r; \
+ *((buf)+fmt->Gshift/8) = g; \
+ *((buf)+fmt->Bshift/8) = b; \
+ } else { \
+ *((buf)+2-fmt->Rshift/8) = r; \
+ *((buf)+2-fmt->Gshift/8) = g; \
+ *((buf)+2-fmt->Bshift/8) = b; \
+ } \
+ } \
+ break; \
+ \
+ case 4: { \
+ Uint32 *bufp; \
+ Uint32 Pixel; \
+ \
+ bufp = (Uint32 *)buf; \
+ PIXEL_FROM_RGB(Pixel, fmt, r, g, b); \
+ *bufp = Pixel | (*bufp & Amask); \
+ } \
+ break; \
+ } \
+}
+
+/* FIXME: Should we rescale alpha into 0..255 here? */
+#define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \
+{ \
+ r = ((Pixel&fmt->Rmask)>>fmt->Rshift)<<fmt->Rloss; \
+ g = ((Pixel&fmt->Gmask)>>fmt->Gshift)<<fmt->Gloss; \
+ b = ((Pixel&fmt->Bmask)>>fmt->Bshift)<<fmt->Bloss; \
+ a = ((Pixel&fmt->Amask)>>fmt->Ashift)<<fmt->Aloss; \
+}
+#define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \
+{ \
+ r = (Pixel&fmt->Rmask)>>fmt->Rshift; \
+ g = (Pixel&fmt->Gmask)>>fmt->Gshift; \
+ b = (Pixel&fmt->Bmask)>>fmt->Bshift; \
+ a = (Pixel&fmt->Amask)>>fmt->Ashift; \
+}
+#define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \
+{ \
+ r = (Pixel>>24); \
+ g = ((Pixel>>16)&0xFF); \
+ b = ((Pixel>>8)&0xFF); \
+ a = (Pixel&0xFF); \
+}
+#define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \
+{ \
+ r = ((Pixel>>16)&0xFF); \
+ g = ((Pixel>>8)&0xFF); \
+ b = (Pixel&0xFF); \
+ a = (Pixel>>24); \
+}
+#define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \
+{ \
+ r = (Pixel&0xFF); \
+ g = ((Pixel>>8)&0xFF); \
+ b = ((Pixel>>16)&0xFF); \
+ a = (Pixel>>24); \
+}
+#define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \
+do { \
+ switch (bpp) { \
+ case 2: \
+ Pixel = *((Uint16 *)(buf)); \
+ break; \
+ \
+ case 3: {/* FIXME: broken code (no alpha) */ \
+ Uint8 *b = (Uint8 *)buf; \
+ if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
+ Pixel = b[0] + (b[1] << 8) + (b[2] << 16); \
+ } else { \
+ Pixel = (b[0] << 16) + (b[1] << 8) + b[2]; \
+ } \
+ } \
+ break; \
+ \
+ case 4: \
+ Pixel = *((Uint32 *)(buf)); \
+ break; \
+ \
+ default: \
+ Pixel = 0; /* stop gcc complaints */ \
+ break; \
+ } \
+ RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
+ Pixel &= ~fmt->Amask; \
+} while(0)
+
+/* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
+#ifdef __NDS__ /* FIXME */
+#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) | (1<<15); \
+}
+#else
+#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); \
+}
+#endif /* __NDS__ FIXME */
+#define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \
+{ \
+ switch (bpp) { \
+ case 2: { \
+ Uint16 Pixel; \
+ \
+ PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \
+ *((Uint16 *)(buf)) = Pixel; \
+ } \
+ break; \
+ \
+ case 3: { /* FIXME: broken code (no alpha) */ \
+ if(SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
+ *((buf)+fmt->Rshift/8) = r; \
+ *((buf)+fmt->Gshift/8) = g; \
+ *((buf)+fmt->Bshift/8) = b; \
+ } else { \
+ *((buf)+2-fmt->Rshift/8) = r; \
+ *((buf)+2-fmt->Gshift/8) = g; \
+ *((buf)+2-fmt->Bshift/8) = b; \
+ } \
+ } \
+ break; \
+ \
+ case 4: { \
+ Uint32 Pixel; \
+ \
+ PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a); \
+ *((Uint32 *)(buf)) = Pixel; \
+ } \
+ break; \
+ } \
+}
+
+/* Blend the RGB values of two Pixels based on a source alpha value */
+#define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \
+do { \
+ dR = (((sR-dR)*(A)+255)>>8)+dR; \
+ dG = (((sG-dG)*(A)+255)>>8)+dG; \
+ dB = (((sB-dB)*(A)+255)>>8)+dB; \
+} while(0)
+
+
+/* This is a very useful loop for optimizing blitters */
+#if defined(_MSC_VER) && (_MSC_VER == 1300)
+/* There's a bug in the Visual C++ 7 optimizer when compiling this code */
+#else
+#define USE_DUFFS_LOOP
+#endif
+#ifdef USE_DUFFS_LOOP
+
+/* 8-times unrolled loop */
+#define DUFFS_LOOP8(pixel_copy_increment, width) \
+{ int n = (width+7)/8; \
+ switch (width & 7) { \
+ case 0: do { pixel_copy_increment; \
+ case 7: pixel_copy_increment; \
+ case 6: pixel_copy_increment; \
+ case 5: pixel_copy_increment; \
+ case 4: pixel_copy_increment; \
+ case 3: pixel_copy_increment; \
+ case 2: pixel_copy_increment; \
+ case 1: pixel_copy_increment; \
+ } while ( --n > 0 ); \
+ } \
+}
+
+/* 4-times unrolled loop */
+#define DUFFS_LOOP4(pixel_copy_increment, width) \
+{ int n = (width+3)/4; \
+ switch (width & 3) { \
+ case 0: do { pixel_copy_increment; \
+ case 3: pixel_copy_increment; \
+ case 2: pixel_copy_increment; \
+ case 1: pixel_copy_increment; \
+ } while ( --n > 0 ); \
+ } \
+}
+
+/* 2 - times unrolled loop */
+#define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \
+ double_pixel_copy_increment, width) \
+{ int n, w = width; \
+ if( w & 1 ) { \
+ pixel_copy_increment; \
+ w--; \
+ } \
+ if ( w > 0 ) { \
+ n = ( w + 2) / 4; \
+ switch( w & 2 ) { \
+ case 0: do { double_pixel_copy_increment; \
+ case 2: double_pixel_copy_increment; \
+ } while ( --n > 0 ); \
+ } \
+ } \
+}
+
+/* 2 - times unrolled loop 4 pixels */
+#define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \
+ double_pixel_copy_increment, \
+ quatro_pixel_copy_increment, width) \
+{ int n, w = width; \
+ if(w & 1) { \
+ pixel_copy_increment; \
+ w--; \
+ } \
+ if(w & 2) { \
+ double_pixel_copy_increment; \
+ w -= 2; \
+ } \
+ if ( w > 0 ) { \
+ n = ( w + 7 ) / 8; \
+ switch( w & 4 ) { \
+ case 0: do { quatro_pixel_copy_increment; \
+ case 4: quatro_pixel_copy_increment; \
+ } while ( --n > 0 ); \
+ } \
+ } \
+}
+
+/* Use the 8-times version of the loop by default */
+#define DUFFS_LOOP(pixel_copy_increment, width) \
+ DUFFS_LOOP8(pixel_copy_increment, width)
+
+#else
+
+/* Don't use Duff's device to unroll loops */
+#define DUFFS_LOOP_DOUBLE2(pixel_copy_increment, \
+ double_pixel_copy_increment, width) \
+{ int n = width; \
+ if( n & 1 ) { \
+ pixel_copy_increment; \
+ n--; \
+ } \
+ n=n>>1; \
+ for(; n > 0; --n) { \
+ double_pixel_copy_increment; \
+ } \
+}
+
+/* Don't use Duff's device to unroll loops */
+#define DUFFS_LOOP_QUATRO2(pixel_copy_increment, \
+ double_pixel_copy_increment, \
+ quatro_pixel_copy_increment, width) \
+{ int n = width; \
+ if(n & 1) { \
+ pixel_copy_increment; \
+ n--; \
+ } \
+ if(n & 2) { \
+ double_pixel_copy_increment; \
+ n -= 2; \
+ } \
+ n=n>>2; \
+ for(; n > 0; --n) { \
+ quatro_pixel_copy_increment; \
+ } \
+}
+
+/* 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)
+
+#endif /* USE_DUFFS_LOOP */
+
+/* Prevent Visual C++ 6.0 from printing out stupid warnings */
+#if defined(_MSC_VER) && (_MSC_VER >= 600)
+#pragma warning(disable: 4550)
+#endif
+
+#endif /* _SDL_blit_h */
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