2015-06-21 15:33:46 +00:00
|
|
|
/*
|
|
|
|
|
Simple DirectMedia Layer
|
2021-01-02 18:25:38 +00:00
|
|
|
Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
|
2015-06-21 15:33:46 +00:00
|
|
|
|
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
|
|
|
warranty. In no event will the authors be held liable for any damages
|
|
|
|
|
arising from the use of this software.
|
|
|
|
|
|
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
|
|
|
including commercial applications, and to alter it and redistribute it
|
|
|
|
|
freely, subject to the following restrictions:
|
|
|
|
|
|
|
|
|
|
1. The origin of this software must not be misrepresented; you must not
|
|
|
|
|
claim that you wrote the original software. If you use this software
|
|
|
|
|
in a product, an acknowledgment in the product documentation would be
|
|
|
|
|
appreciated but is not required.
|
|
|
|
|
2. Altered source versions must be plainly marked as such, and must not be
|
|
|
|
|
misrepresented as being the original software.
|
|
|
|
|
3. This notice may not be removed or altered from any source distribution.
|
|
|
|
|
*/
|
|
|
|
|
#include "../SDL_internal.h"
|
|
|
|
|
|
2016-11-21 05:34:54 +00:00
|
|
|
#ifndef SDL_blit_h_
|
|
|
|
|
#define SDL_blit_h_
|
2015-06-21 15:33:46 +00:00
|
|
|
|
|
|
|
|
#include "SDL_cpuinfo.h"
|
|
|
|
|
#include "SDL_endian.h"
|
|
|
|
|
#include "SDL_surface.h"
|
|
|
|
|
|
|
|
|
|
/* Table to do pixel byte expansion */
|
|
|
|
|
extern Uint8* SDL_expand_byte[9];
|
|
|
|
|
|
|
|
|
|
/* SDL blit copy flags */
|
|
|
|
|
#define SDL_COPY_MODULATE_COLOR 0x00000001
|
|
|
|
|
#define SDL_COPY_MODULATE_ALPHA 0x00000002
|
|
|
|
|
#define SDL_COPY_BLEND 0x00000010
|
|
|
|
|
#define SDL_COPY_ADD 0x00000020
|
|
|
|
|
#define SDL_COPY_MOD 0x00000040
|
2020-01-16 16:52:59 +00:00
|
|
|
#define SDL_COPY_MUL 0x00000080
|
2015-06-21 15:33:46 +00:00
|
|
|
#define SDL_COPY_COLORKEY 0x00000100
|
|
|
|
|
#define SDL_COPY_NEAREST 0x00000200
|
|
|
|
|
#define SDL_COPY_RLE_DESIRED 0x00001000
|
|
|
|
|
#define SDL_COPY_RLE_COLORKEY 0x00002000
|
|
|
|
|
#define SDL_COPY_RLE_ALPHAKEY 0x00004000
|
|
|
|
|
#define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED|SDL_COPY_RLE_COLORKEY|SDL_COPY_RLE_ALPHAKEY)
|
|
|
|
|
|
|
|
|
|
/* SDL blit CPU flags */
|
|
|
|
|
#define SDL_CPU_ANY 0x00000000
|
|
|
|
|
#define SDL_CPU_MMX 0x00000001
|
|
|
|
|
#define SDL_CPU_3DNOW 0x00000002
|
|
|
|
|
#define SDL_CPU_SSE 0x00000004
|
|
|
|
|
#define SDL_CPU_SSE2 0x00000008
|
|
|
|
|
#define SDL_CPU_ALTIVEC_PREFETCH 0x00000010
|
|
|
|
|
#define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020
|
|
|
|
|
|
|
|
|
|
typedef struct
|
|
|
|
|
{
|
|
|
|
|
Uint8 *src;
|
|
|
|
|
int src_w, src_h;
|
|
|
|
|
int src_pitch;
|
|
|
|
|
int src_skip;
|
|
|
|
|
Uint8 *dst;
|
|
|
|
|
int dst_w, dst_h;
|
|
|
|
|
int dst_pitch;
|
|
|
|
|
int dst_skip;
|
|
|
|
|
SDL_PixelFormat *src_fmt;
|
|
|
|
|
SDL_PixelFormat *dst_fmt;
|
|
|
|
|
Uint8 *table;
|
|
|
|
|
int flags;
|
|
|
|
|
Uint32 colorkey;
|
|
|
|
|
Uint8 r, g, b, a;
|
|
|
|
|
} SDL_BlitInfo;
|
|
|
|
|
|
2017-08-14 04:09:00 +00:00
|
|
|
typedef void (*SDL_BlitFunc) (SDL_BlitInfo *info);
|
|
|
|
|
|
2015-06-21 15:33:46 +00:00
|
|
|
|
|
|
|
|
typedef struct
|
|
|
|
|
{
|
|
|
|
|
Uint32 src_format;
|
|
|
|
|
Uint32 dst_format;
|
|
|
|
|
int flags;
|
|
|
|
|
int cpu;
|
|
|
|
|
SDL_BlitFunc func;
|
|
|
|
|
} SDL_BlitFuncEntry;
|
|
|
|
|
|
|
|
|
|
/* Blit mapping definition */
|
|
|
|
|
typedef struct SDL_BlitMap
|
|
|
|
|
{
|
|
|
|
|
SDL_Surface *dst;
|
|
|
|
|
int identity;
|
|
|
|
|
SDL_blit blit;
|
|
|
|
|
void *data;
|
|
|
|
|
SDL_BlitInfo info;
|
|
|
|
|
|
|
|
|
|
/* the version count matches the destination; mismatch indicates
|
|
|
|
|
an invalid mapping */
|
|
|
|
|
Uint32 dst_palette_version;
|
|
|
|
|
Uint32 src_palette_version;
|
|
|
|
|
} SDL_BlitMap;
|
|
|
|
|
|
|
|
|
|
/* Functions found in SDL_blit.c */
|
|
|
|
|
extern int SDL_CalculateBlit(SDL_Surface * surface);
|
|
|
|
|
|
|
|
|
|
/* Functions found in SDL_blit_*.c */
|
|
|
|
|
extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface * surface);
|
|
|
|
|
extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface * surface);
|
|
|
|
|
extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface * surface);
|
|
|
|
|
extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface * surface);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Useful macros for blitting routines
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#if defined(__GNUC__)
|
|
|
|
|
#define DECLARE_ALIGNED(t,v,a) t __attribute__((aligned(a))) v
|
|
|
|
|
#elif defined(_MSC_VER)
|
|
|
|
|
#define DECLARE_ALIGNED(t,v,a) __declspec(align(a)) t v
|
|
|
|
|
#else
|
|
|
|
|
#define DECLARE_ALIGNED(t,v,a) t v
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Load pixel of the specified format from a buffer and get its R-G-B values */
|
|
|
|
|
#define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \
|
|
|
|
|
{ \
|
|
|
|
|
r = SDL_expand_byte[fmt->Rloss][((Pixel&fmt->Rmask)>>fmt->Rshift)]; \
|
|
|
|
|
g = SDL_expand_byte[fmt->Gloss][((Pixel&fmt->Gmask)>>fmt->Gshift)]; \
|
|
|
|
|
b = SDL_expand_byte[fmt->Bloss][((Pixel&fmt->Bmask)>>fmt->Bshift)]; \
|
|
|
|
|
}
|
|
|
|
|
#define RGB_FROM_RGB565(Pixel, r, g, b) \
|
2018-10-01 18:29:11 +00:00
|
|
|
{ \
|
2015-06-21 15:33:46 +00:00
|
|
|
r = SDL_expand_byte[3][((Pixel&0xF800)>>11)]; \
|
|
|
|
|
g = SDL_expand_byte[2][((Pixel&0x07E0)>>5)]; \
|
|
|
|
|
b = SDL_expand_byte[3][(Pixel&0x001F)]; \
|
|
|
|
|
}
|
|
|
|
|
#define RGB_FROM_RGB555(Pixel, r, g, b) \
|
|
|
|
|
{ \
|
|
|
|
|
r = SDL_expand_byte[3][((Pixel&0x7C00)>>10)]; \
|
|
|
|
|
g = SDL_expand_byte[3][((Pixel&0x03E0)>>5)]; \
|
|
|
|
|
b = SDL_expand_byte[3][(Pixel&0x001F)]; \
|
|
|
|
|
}
|
|
|
|
|
#define RGB_FROM_RGB888(Pixel, r, g, b) \
|
|
|
|
|
{ \
|
|
|
|
|
r = ((Pixel&0xFF0000)>>16); \
|
|
|
|
|
g = ((Pixel&0xFF00)>>8); \
|
|
|
|
|
b = (Pixel&0xFF); \
|
|
|
|
|
}
|
|
|
|
|
#define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \
|
|
|
|
|
do { \
|
|
|
|
|
switch (bpp) { \
|
|
|
|
|
case 1: \
|
|
|
|
|
Pixel = *((Uint8 *)(buf)); \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 2: \
|
|
|
|
|
Pixel = *((Uint16 *)(buf)); \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 3: { \
|
|
|
|
|
Uint8 *B = (Uint8 *)(buf); \
|
|
|
|
|
if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
|
|
|
|
|
Pixel = B[0] + (B[1] << 8) + (B[2] << 16); \
|
|
|
|
|
} else { \
|
|
|
|
|
Pixel = (B[0] << 16) + (B[1] << 8) + B[2]; \
|
|
|
|
|
} \
|
|
|
|
|
} \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 4: \
|
|
|
|
|
Pixel = *((Uint32 *)(buf)); \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
default: \
|
|
|
|
|
Pixel = 0; /* stop gcc complaints */ \
|
|
|
|
|
break; \
|
|
|
|
|
} \
|
|
|
|
|
} while (0)
|
|
|
|
|
|
|
|
|
|
#define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \
|
|
|
|
|
do { \
|
|
|
|
|
switch (bpp) { \
|
|
|
|
|
case 1: \
|
|
|
|
|
Pixel = *((Uint8 *)(buf)); \
|
|
|
|
|
RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 2: \
|
|
|
|
|
Pixel = *((Uint16 *)(buf)); \
|
|
|
|
|
RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 3: { \
|
|
|
|
|
Pixel = 0; \
|
|
|
|
|
if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
|
|
|
|
|
r = *((buf)+fmt->Rshift/8); \
|
|
|
|
|
g = *((buf)+fmt->Gshift/8); \
|
|
|
|
|
b = *((buf)+fmt->Bshift/8); \
|
|
|
|
|
} else { \
|
|
|
|
|
r = *((buf)+2-fmt->Rshift/8); \
|
|
|
|
|
g = *((buf)+2-fmt->Gshift/8); \
|
|
|
|
|
b = *((buf)+2-fmt->Bshift/8); \
|
|
|
|
|
} \
|
|
|
|
|
} \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 4: \
|
|
|
|
|
Pixel = *((Uint32 *)(buf)); \
|
|
|
|
|
RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
default: \
|
|
|
|
|
/* stop gcc complaints */ \
|
|
|
|
|
Pixel = 0; \
|
|
|
|
|
r = g = b = 0; \
|
|
|
|
|
break; \
|
|
|
|
|
} \
|
|
|
|
|
} while (0)
|
|
|
|
|
|
|
|
|
|
/* Assemble R-G-B values into a specified pixel format and store them */
|
|
|
|
|
#define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \
|
|
|
|
|
{ \
|
|
|
|
|
Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
|
|
|
|
|
((g>>fmt->Gloss)<<fmt->Gshift)| \
|
|
|
|
|
((b>>fmt->Bloss)<<fmt->Bshift)| \
|
|
|
|
|
fmt->Amask; \
|
|
|
|
|
}
|
|
|
|
|
#define RGB565_FROM_RGB(Pixel, r, g, b) \
|
|
|
|
|
{ \
|
|
|
|
|
Pixel = ((r>>3)<<11)|((g>>2)<<5)|(b>>3); \
|
|
|
|
|
}
|
|
|
|
|
#define RGB555_FROM_RGB(Pixel, r, g, b) \
|
|
|
|
|
{ \
|
|
|
|
|
Pixel = ((r>>3)<<10)|((g>>3)<<5)|(b>>3); \
|
|
|
|
|
}
|
|
|
|
|
#define RGB888_FROM_RGB(Pixel, r, g, b) \
|
|
|
|
|
{ \
|
|
|
|
|
Pixel = (r<<16)|(g<<8)|b; \
|
|
|
|
|
}
|
|
|
|
|
#define ARGB8888_FROM_RGBA(Pixel, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
Pixel = (a<<24)|(r<<16)|(g<<8)|b; \
|
|
|
|
|
}
|
|
|
|
|
#define RGBA8888_FROM_RGBA(Pixel, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
Pixel = (r<<24)|(g<<16)|(b<<8)|a; \
|
|
|
|
|
}
|
|
|
|
|
#define ABGR8888_FROM_RGBA(Pixel, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
Pixel = (a<<24)|(b<<16)|(g<<8)|r; \
|
|
|
|
|
}
|
|
|
|
|
#define BGRA8888_FROM_RGBA(Pixel, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
Pixel = (b<<24)|(g<<16)|(r<<8)|a; \
|
|
|
|
|
}
|
|
|
|
|
#define ARGB2101010_FROM_RGBA(Pixel, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
r = r ? ((r << 2) | 0x3) : 0; \
|
|
|
|
|
g = g ? ((g << 2) | 0x3) : 0; \
|
|
|
|
|
b = b ? ((b << 2) | 0x3) : 0; \
|
|
|
|
|
a = (a * 3) / 255; \
|
|
|
|
|
Pixel = (a<<30)|(r<<20)|(g<<10)|b; \
|
|
|
|
|
}
|
|
|
|
|
#define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \
|
|
|
|
|
{ \
|
|
|
|
|
switch (bpp) { \
|
|
|
|
|
case 1: { \
|
2018-10-01 18:29:11 +00:00
|
|
|
Uint8 _Pixel; \
|
2015-06-21 15:33:46 +00:00
|
|
|
\
|
2018-10-01 18:29:11 +00:00
|
|
|
PIXEL_FROM_RGB(_Pixel, fmt, r, g, b); \
|
|
|
|
|
*((Uint8 *)(buf)) = _Pixel; \
|
2015-06-21 15:33:46 +00:00
|
|
|
} \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 2: { \
|
2018-10-01 18:29:11 +00:00
|
|
|
Uint16 _Pixel; \
|
2015-06-21 15:33:46 +00:00
|
|
|
\
|
2018-10-01 18:29:11 +00:00
|
|
|
PIXEL_FROM_RGB(_Pixel, fmt, r, g, b); \
|
|
|
|
|
*((Uint16 *)(buf)) = _Pixel; \
|
2015-06-21 15:33:46 +00:00
|
|
|
} \
|
|
|
|
|
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: { \
|
2018-10-01 18:29:11 +00:00
|
|
|
Uint32 _Pixel; \
|
2015-06-21 15:33:46 +00:00
|
|
|
\
|
2018-10-01 18:29:11 +00:00
|
|
|
PIXEL_FROM_RGB(_Pixel, fmt, r, g, b); \
|
|
|
|
|
*((Uint32 *)(buf)) = _Pixel; \
|
2015-06-21 15:33:46 +00:00
|
|
|
} \
|
|
|
|
|
break; \
|
|
|
|
|
} \
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* FIXME: Should we rescale alpha into 0..255 here? */
|
|
|
|
|
#define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
r = SDL_expand_byte[fmt->Rloss][((Pixel&fmt->Rmask)>>fmt->Rshift)]; \
|
|
|
|
|
g = SDL_expand_byte[fmt->Gloss][((Pixel&fmt->Gmask)>>fmt->Gshift)]; \
|
|
|
|
|
b = SDL_expand_byte[fmt->Bloss][((Pixel&fmt->Bmask)>>fmt->Bshift)]; \
|
|
|
|
|
a = SDL_expand_byte[fmt->Aloss][((Pixel&fmt->Amask)>>fmt->Ashift)]; \
|
|
|
|
|
}
|
|
|
|
|
#define RGBA_FROM_8888(Pixel, fmt, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
r = (Pixel&fmt->Rmask)>>fmt->Rshift; \
|
|
|
|
|
g = (Pixel&fmt->Gmask)>>fmt->Gshift; \
|
|
|
|
|
b = (Pixel&fmt->Bmask)>>fmt->Bshift; \
|
|
|
|
|
a = (Pixel&fmt->Amask)>>fmt->Ashift; \
|
|
|
|
|
}
|
|
|
|
|
#define RGBA_FROM_RGBA8888(Pixel, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
r = (Pixel>>24); \
|
|
|
|
|
g = ((Pixel>>16)&0xFF); \
|
|
|
|
|
b = ((Pixel>>8)&0xFF); \
|
|
|
|
|
a = (Pixel&0xFF); \
|
|
|
|
|
}
|
|
|
|
|
#define RGBA_FROM_ARGB8888(Pixel, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
r = ((Pixel>>16)&0xFF); \
|
|
|
|
|
g = ((Pixel>>8)&0xFF); \
|
|
|
|
|
b = (Pixel&0xFF); \
|
|
|
|
|
a = (Pixel>>24); \
|
|
|
|
|
}
|
|
|
|
|
#define RGBA_FROM_ABGR8888(Pixel, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
r = (Pixel&0xFF); \
|
|
|
|
|
g = ((Pixel>>8)&0xFF); \
|
|
|
|
|
b = ((Pixel>>16)&0xFF); \
|
|
|
|
|
a = (Pixel>>24); \
|
|
|
|
|
}
|
|
|
|
|
#define RGBA_FROM_BGRA8888(Pixel, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
r = ((Pixel>>8)&0xFF); \
|
|
|
|
|
g = ((Pixel>>16)&0xFF); \
|
|
|
|
|
b = (Pixel>>24); \
|
|
|
|
|
a = (Pixel&0xFF); \
|
|
|
|
|
}
|
|
|
|
|
#define RGBA_FROM_ARGB2101010(Pixel, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
r = ((Pixel>>22)&0xFF); \
|
|
|
|
|
g = ((Pixel>>12)&0xFF); \
|
|
|
|
|
b = ((Pixel>>2)&0xFF); \
|
|
|
|
|
a = SDL_expand_byte[6][(Pixel>>30)]; \
|
|
|
|
|
}
|
|
|
|
|
#define DISEMBLE_RGBA(buf, bpp, fmt, Pixel, r, g, b, a) \
|
|
|
|
|
do { \
|
|
|
|
|
switch (bpp) { \
|
|
|
|
|
case 1: \
|
|
|
|
|
Pixel = *((Uint8 *)(buf)); \
|
|
|
|
|
RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 2: \
|
|
|
|
|
Pixel = *((Uint16 *)(buf)); \
|
|
|
|
|
RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 3: { \
|
|
|
|
|
Pixel = 0; \
|
|
|
|
|
if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
|
|
|
|
|
r = *((buf)+fmt->Rshift/8); \
|
|
|
|
|
g = *((buf)+fmt->Gshift/8); \
|
|
|
|
|
b = *((buf)+fmt->Bshift/8); \
|
|
|
|
|
} else { \
|
|
|
|
|
r = *((buf)+2-fmt->Rshift/8); \
|
|
|
|
|
g = *((buf)+2-fmt->Gshift/8); \
|
|
|
|
|
b = *((buf)+2-fmt->Bshift/8); \
|
|
|
|
|
} \
|
|
|
|
|
a = 0xFF; \
|
|
|
|
|
} \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 4: \
|
|
|
|
|
Pixel = *((Uint32 *)(buf)); \
|
|
|
|
|
RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
default: \
|
|
|
|
|
/* stop gcc complaints */ \
|
|
|
|
|
Pixel = 0; \
|
|
|
|
|
r = g = b = a = 0; \
|
|
|
|
|
break; \
|
|
|
|
|
} \
|
|
|
|
|
} while (0)
|
|
|
|
|
|
|
|
|
|
/* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
|
|
|
|
|
#define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
Pixel = ((r>>fmt->Rloss)<<fmt->Rshift)| \
|
|
|
|
|
((g>>fmt->Gloss)<<fmt->Gshift)| \
|
|
|
|
|
((b>>fmt->Bloss)<<fmt->Bshift)| \
|
|
|
|
|
((a>>fmt->Aloss)<<fmt->Ashift); \
|
|
|
|
|
}
|
|
|
|
|
#define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \
|
|
|
|
|
{ \
|
|
|
|
|
switch (bpp) { \
|
|
|
|
|
case 1: { \
|
|
|
|
|
Uint8 _pixel; \
|
|
|
|
|
\
|
|
|
|
|
PIXEL_FROM_RGBA(_pixel, fmt, r, g, b, a); \
|
|
|
|
|
*((Uint8 *)(buf)) = _pixel; \
|
|
|
|
|
} \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 2: { \
|
|
|
|
|
Uint16 _pixel; \
|
|
|
|
|
\
|
|
|
|
|
PIXEL_FROM_RGBA(_pixel, fmt, r, g, b, a); \
|
|
|
|
|
*((Uint16 *)(buf)) = _pixel; \
|
|
|
|
|
} \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 3: { \
|
|
|
|
|
if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
|
|
|
|
|
*((buf)+fmt->Rshift/8) = r; \
|
|
|
|
|
*((buf)+fmt->Gshift/8) = g; \
|
|
|
|
|
*((buf)+fmt->Bshift/8) = b; \
|
|
|
|
|
} else { \
|
|
|
|
|
*((buf)+2-fmt->Rshift/8) = r; \
|
|
|
|
|
*((buf)+2-fmt->Gshift/8) = g; \
|
|
|
|
|
*((buf)+2-fmt->Bshift/8) = b; \
|
|
|
|
|
} \
|
|
|
|
|
} \
|
|
|
|
|
break; \
|
|
|
|
|
\
|
|
|
|
|
case 4: { \
|
|
|
|
|
Uint32 _pixel; \
|
|
|
|
|
\
|
|
|
|
|
PIXEL_FROM_RGBA(_pixel, fmt, r, g, b, a); \
|
|
|
|
|
*((Uint32 *)(buf)) = _pixel; \
|
|
|
|
|
} \
|
|
|
|
|
break; \
|
|
|
|
|
} \
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Blend the RGB values of two pixels with an alpha value */
|
|
|
|
|
#define ALPHA_BLEND_RGB(sR, sG, sB, A, dR, dG, dB) \
|
|
|
|
|
do { \
|
2017-01-08 00:51:48 +00:00
|
|
|
dR = (Uint8)((((int)(sR-dR)*(int)A)/255)+dR); \
|
|
|
|
|
dG = (Uint8)((((int)(sG-dG)*(int)A)/255)+dG); \
|
|
|
|
|
dB = (Uint8)((((int)(sB-dB)*(int)A)/255)+dB); \
|
2015-06-21 15:33:46 +00:00
|
|
|
} while(0)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Blend the RGBA values of two pixels */
|
|
|
|
|
#define ALPHA_BLEND_RGBA(sR, sG, sB, sA, dR, dG, dB, dA) \
|
|
|
|
|
do { \
|
2017-01-08 00:51:48 +00:00
|
|
|
dR = (Uint8)((((int)(sR-dR)*(int)sA)/255)+dR); \
|
|
|
|
|
dG = (Uint8)((((int)(sG-dG)*(int)sA)/255)+dG); \
|
|
|
|
|
dB = (Uint8)((((int)(sB-dB)*(int)sA)/255)+dB); \
|
2017-01-05 16:16:39 +00:00
|
|
|
dA = (Uint8)((int)sA+dA-((int)sA*dA)/255); \
|
2015-06-21 15:33:46 +00:00
|
|
|
} while(0)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* This is a very useful loop for optimizing blitters */
|
|
|
|
|
#if defined(_MSC_VER) && (_MSC_VER == 1300)
|
|
|
|
|
/* There's a bug in the Visual C++ 7 optimizer when compiling this code */
|
|
|
|
|
#else
|
|
|
|
|
#define USE_DUFFS_LOOP
|
|
|
|
|
#endif
|
|
|
|
|
#ifdef USE_DUFFS_LOOP
|
|
|
|
|
|
|
|
|
|
/* 8-times unrolled loop */
|
|
|
|
|
#define DUFFS_LOOP8(pixel_copy_increment, width) \
|
|
|
|
|
{ int n = (width+7)/8; \
|
|
|
|
|
switch (width & 7) { \
|
2017-09-06 11:32:30 +00:00
|
|
|
case 0: do { pixel_copy_increment; /* fallthrough */ \
|
|
|
|
|
case 7: pixel_copy_increment; /* fallthrough */ \
|
|
|
|
|
case 6: pixel_copy_increment; /* fallthrough */ \
|
|
|
|
|
case 5: pixel_copy_increment; /* fallthrough */ \
|
|
|
|
|
case 4: pixel_copy_increment; /* fallthrough */ \
|
|
|
|
|
case 3: pixel_copy_increment; /* fallthrough */ \
|
|
|
|
|
case 2: pixel_copy_increment; /* fallthrough */ \
|
|
|
|
|
case 1: pixel_copy_increment; /* fallthrough */ \
|
2015-06-21 15:33:46 +00:00
|
|
|
} while ( --n > 0 ); \
|
|
|
|
|
} \
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* 4-times unrolled loop */
|
|
|
|
|
#define DUFFS_LOOP4(pixel_copy_increment, width) \
|
|
|
|
|
{ int n = (width+3)/4; \
|
|
|
|
|
switch (width & 3) { \
|
2017-09-10 19:49:41 +00:00
|
|
|
case 0: do { pixel_copy_increment; /* fallthrough */ \
|
|
|
|
|
case 3: pixel_copy_increment; /* fallthrough */ \
|
|
|
|
|
case 2: pixel_copy_increment; /* fallthrough */ \
|
|
|
|
|
case 1: pixel_copy_increment; /* fallthrough */ \
|
2015-06-21 15:33:46 +00:00
|
|
|
} while (--n > 0); \
|
|
|
|
|
} \
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Use the 8-times version of the loop by default */
|
|
|
|
|
#define DUFFS_LOOP(pixel_copy_increment, width) \
|
|
|
|
|
DUFFS_LOOP8(pixel_copy_increment, width)
|
|
|
|
|
|
|
|
|
|
/* Special version of Duff's device for even more optimization */
|
|
|
|
|
#define DUFFS_LOOP_124(pixel_copy_increment1, \
|
|
|
|
|
pixel_copy_increment2, \
|
|
|
|
|
pixel_copy_increment4, width) \
|
|
|
|
|
{ int n = width; \
|
|
|
|
|
if (n & 1) { \
|
|
|
|
|
pixel_copy_increment1; n -= 1; \
|
|
|
|
|
} \
|
|
|
|
|
if (n & 2) { \
|
|
|
|
|
pixel_copy_increment2; n -= 2; \
|
|
|
|
|
} \
|
|
|
|
|
if (n & 4) { \
|
|
|
|
|
pixel_copy_increment4; n -= 4; \
|
|
|
|
|
} \
|
|
|
|
|
if (n) { \
|
|
|
|
|
n /= 8; \
|
|
|
|
|
do { \
|
|
|
|
|
pixel_copy_increment4; \
|
|
|
|
|
pixel_copy_increment4; \
|
|
|
|
|
} while (--n > 0); \
|
|
|
|
|
} \
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#else
|
|
|
|
|
|
|
|
|
|
/* Don't use Duff's device to unroll loops */
|
|
|
|
|
#define DUFFS_LOOP(pixel_copy_increment, width) \
|
|
|
|
|
{ int n; \
|
|
|
|
|
for ( n=width; n > 0; --n ) { \
|
|
|
|
|
pixel_copy_increment; \
|
|
|
|
|
} \
|
|
|
|
|
}
|
|
|
|
|
#define DUFFS_LOOP8(pixel_copy_increment, width) \
|
|
|
|
|
DUFFS_LOOP(pixel_copy_increment, width)
|
|
|
|
|
#define DUFFS_LOOP4(pixel_copy_increment, width) \
|
|
|
|
|
DUFFS_LOOP(pixel_copy_increment, width)
|
|
|
|
|
#define DUFFS_LOOP_124(pixel_copy_increment1, \
|
|
|
|
|
pixel_copy_increment2, \
|
|
|
|
|
pixel_copy_increment4, width) \
|
|
|
|
|
DUFFS_LOOP(pixel_copy_increment1, width)
|
|
|
|
|
|
|
|
|
|
#endif /* USE_DUFFS_LOOP */
|
|
|
|
|
|
|
|
|
|
/* Prevent Visual C++ 6.0 from printing out stupid warnings */
|
|
|
|
|
#if defined(_MSC_VER) && (_MSC_VER >= 600)
|
|
|
|
|
#pragma warning(disable: 4550)
|
|
|
|
|
#endif
|
|
|
|
|
|
2016-11-21 05:34:54 +00:00
|
|
|
#endif /* SDL_blit_h_ */
|
2015-06-21 15:33:46 +00:00
|
|
|
|
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|
