583 lines
26 KiB
C
583 lines
26 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#ifndef SDL_blit_h_
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#define SDL_blit_h_
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/* pixman ARM blitters are 32 bit only : */
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#if defined(__aarch64__) || defined(_M_ARM64)
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#undef SDL_ARM_SIMD_BLITTERS
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#undef SDL_ARM_NEON_BLITTERS
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#endif
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/* Table to do pixel byte expansion */
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extern Uint8 *SDL_expand_byte[9];
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/* SDL blit copy flags */
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#define SDL_COPY_MODULATE_COLOR 0x00000001
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#define SDL_COPY_MODULATE_ALPHA 0x00000002
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#define SDL_COPY_BLEND 0x00000010
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#define SDL_COPY_ADD 0x00000020
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#define SDL_COPY_MOD 0x00000040
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#define SDL_COPY_MUL 0x00000080
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#define SDL_COPY_COLORKEY 0x00000100
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#define SDL_COPY_NEAREST 0x00000200
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#define SDL_COPY_RLE_DESIRED 0x00001000
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#define SDL_COPY_RLE_COLORKEY 0x00002000
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#define SDL_COPY_RLE_ALPHAKEY 0x00004000
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#define SDL_COPY_RLE_MASK (SDL_COPY_RLE_DESIRED | SDL_COPY_RLE_COLORKEY | SDL_COPY_RLE_ALPHAKEY)
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/* SDL blit CPU flags */
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#define SDL_CPU_ANY 0x00000000
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#define SDL_CPU_MMX 0x00000001
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#define SDL_CPU_SSE 0x00000002
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#define SDL_CPU_SSE2 0x00000004
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#define SDL_CPU_ALTIVEC_PREFETCH 0x00000008
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#define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000010
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typedef struct
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{
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Uint8 *src;
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int src_w, src_h;
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int src_pitch;
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int src_skip;
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Uint8 *dst;
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int dst_w, dst_h;
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int dst_pitch;
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int dst_skip;
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SDL_PixelFormat *src_fmt;
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SDL_PixelFormat *dst_fmt;
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Uint8 *table;
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int flags;
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Uint32 colorkey;
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Uint8 r, g, b, a;
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} SDL_BlitInfo;
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typedef void (*SDL_BlitFunc)(SDL_BlitInfo *info);
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typedef struct
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{
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Uint32 src_format;
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Uint32 dst_format;
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int flags;
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int cpu;
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SDL_BlitFunc func;
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} SDL_BlitFuncEntry;
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/* Blit mapping definition */
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/* typedef'ed in SDL_surface.h */
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struct SDL_BlitMap
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{
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SDL_Surface *dst;
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int identity;
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SDL_blit blit;
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void *data;
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SDL_BlitInfo info;
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/* the version count matches the destination; mismatch indicates
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an invalid mapping */
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Uint32 dst_palette_version;
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Uint32 src_palette_version;
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};
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/* Functions found in SDL_blit.c */
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extern int SDL_CalculateBlit(SDL_Surface *surface);
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/* Functions found in SDL_blit_*.c */
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extern SDL_BlitFunc SDL_CalculateBlit0(SDL_Surface *surface);
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extern SDL_BlitFunc SDL_CalculateBlit1(SDL_Surface *surface);
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extern SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface *surface);
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extern SDL_BlitFunc SDL_CalculateBlitA(SDL_Surface *surface);
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/*
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* Useful macros for blitting routines
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*/
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#if defined(__GNUC__)
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#define DECLARE_ALIGNED(t, v, a) t __attribute__((aligned(a))) v
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#elif defined(_MSC_VER)
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#define DECLARE_ALIGNED(t, v, a) __declspec(align(a)) t v
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#else
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#define DECLARE_ALIGNED(t, v, a) t v
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#endif
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/* Load pixel of the specified format from a buffer and get its R-G-B values */
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#define RGB_FROM_PIXEL(Pixel, fmt, r, g, b) \
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{ \
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r = SDL_expand_byte[fmt->Rloss][((Pixel & fmt->Rmask) >> fmt->Rshift)]; \
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g = SDL_expand_byte[fmt->Gloss][((Pixel & fmt->Gmask) >> fmt->Gshift)]; \
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b = SDL_expand_byte[fmt->Bloss][((Pixel & fmt->Bmask) >> fmt->Bshift)]; \
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}
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#define RGB_FROM_RGB565(Pixel, r, g, b) \
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{ \
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r = SDL_expand_byte[3][((Pixel & 0xF800) >> 11)]; \
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g = SDL_expand_byte[2][((Pixel & 0x07E0) >> 5)]; \
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b = SDL_expand_byte[3][(Pixel & 0x001F)]; \
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}
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#define RGB_FROM_RGB555(Pixel, r, g, b) \
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{ \
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r = SDL_expand_byte[3][((Pixel & 0x7C00) >> 10)]; \
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g = SDL_expand_byte[3][((Pixel & 0x03E0) >> 5)]; \
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b = SDL_expand_byte[3][(Pixel & 0x001F)]; \
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}
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#define RGB_FROM_RGB888(Pixel, r, g, b) \
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{ \
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r = ((Pixel & 0xFF0000) >> 16); \
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g = ((Pixel & 0xFF00) >> 8); \
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b = (Pixel & 0xFF); \
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}
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#define RETRIEVE_RGB_PIXEL(buf, bpp, Pixel) \
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do { \
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switch (bpp) { \
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case 1: \
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Pixel = *((Uint8 *)(buf)); \
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break; \
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\
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case 2: \
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Pixel = *((Uint16 *)(buf)); \
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break; \
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\
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case 3: \
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{ \
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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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} break; \
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\
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case 4: \
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Pixel = *((Uint32 *)(buf)); \
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break; \
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\
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default: \
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Pixel = 0; /* stop gcc complaints */ \
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break; \
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} \
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} while (0)
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#define DISEMBLE_RGB(buf, bpp, fmt, Pixel, r, g, b) \
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do { \
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switch (bpp) { \
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case 1: \
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Pixel = *((Uint8 *)(buf)); \
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RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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break; \
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\
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case 2: \
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Pixel = *((Uint16 *)(buf)); \
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RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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break; \
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\
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case 3: \
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{ \
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Pixel = 0; \
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if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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r = *((buf) + fmt->Rshift / 8); \
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g = *((buf) + fmt->Gshift / 8); \
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b = *((buf) + fmt->Bshift / 8); \
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} else { \
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r = *((buf) + 2 - fmt->Rshift / 8); \
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g = *((buf) + 2 - fmt->Gshift / 8); \
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b = *((buf) + 2 - fmt->Bshift / 8); \
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} \
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} break; \
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\
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case 4: \
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Pixel = *((Uint32 *)(buf)); \
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RGB_FROM_PIXEL(Pixel, fmt, r, g, b); \
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break; \
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\
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default: \
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/* stop gcc complaints */ \
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Pixel = 0; \
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r = g = b = 0; \
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break; \
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} \
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} while (0)
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/* Assemble R-G-B values into a specified pixel format and store them */
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#define PIXEL_FROM_RGB(Pixel, fmt, r, g, b) \
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{ \
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Pixel = ((r >> fmt->Rloss) << fmt->Rshift) | \
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((g >> fmt->Gloss) << fmt->Gshift) | \
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((b >> fmt->Bloss) << fmt->Bshift) | \
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fmt->Amask; \
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}
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#define RGB565_FROM_RGB(Pixel, r, g, b) \
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{ \
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Pixel = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3); \
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}
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#define RGB555_FROM_RGB(Pixel, r, g, b) \
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{ \
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Pixel = ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3); \
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}
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#define RGB888_FROM_RGB(Pixel, r, g, b) \
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{ \
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Pixel = (r << 16) | (g << 8) | b; \
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}
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#define ARGB8888_FROM_RGBA(Pixel, r, g, b, a) \
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{ \
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Pixel = (a << 24) | (r << 16) | (g << 8) | b; \
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}
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#define RGBA8888_FROM_RGBA(Pixel, r, g, b, a) \
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{ \
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Pixel = (r << 24) | (g << 16) | (b << 8) | a; \
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}
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#define ABGR8888_FROM_RGBA(Pixel, r, g, b, a) \
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{ \
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Pixel = (a << 24) | (b << 16) | (g << 8) | r; \
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}
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#define BGRA8888_FROM_RGBA(Pixel, r, g, b, a) \
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{ \
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Pixel = (b << 24) | (g << 16) | (r << 8) | a; \
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}
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#define ARGB2101010_FROM_RGBA(Pixel, r, g, b, a) \
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{ \
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r = r ? ((r << 2) | 0x3) : 0; \
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g = g ? ((g << 2) | 0x3) : 0; \
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b = b ? ((b << 2) | 0x3) : 0; \
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a = (a * 3) / 255; \
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Pixel = (a << 30) | (r << 20) | (g << 10) | b; \
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}
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#define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \
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{ \
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switch (bpp) { \
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case 1: \
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{ \
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Uint8 _pixel; \
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\
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PIXEL_FROM_RGB(_pixel, fmt, r, g, b); \
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*((Uint8 *)(buf)) = _pixel; \
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} break; \
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\
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case 2: \
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{ \
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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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} break; \
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\
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case 3: \
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{ \
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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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} break; \
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\
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case 4: \
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{ \
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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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} break; \
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} \
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}
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/* FIXME: Should we rescale alpha into 0..255 here? */
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#define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \
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{ \
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r = SDL_expand_byte[fmt->Rloss][((Pixel & fmt->Rmask) >> fmt->Rshift)]; \
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g = SDL_expand_byte[fmt->Gloss][((Pixel & fmt->Gmask) >> fmt->Gshift)]; \
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b = SDL_expand_byte[fmt->Bloss][((Pixel & fmt->Bmask) >> fmt->Bshift)]; \
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a = SDL_expand_byte[fmt->Aloss][((Pixel & fmt->Amask) >> fmt->Ashift)]; \
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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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}
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#define RGBA_FROM_BGRA8888(Pixel, r, g, b, a) \
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{ \
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r = ((Pixel >> 8) & 0xFF); \
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g = ((Pixel >> 16) & 0xFF); \
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b = (Pixel >> 24); \
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a = (Pixel & 0xFF); \
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}
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#define RGBA_FROM_ARGB2101010(Pixel, r, g, b, a) \
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{ \
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r = ((Pixel >> 22) & 0xFF); \
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g = ((Pixel >> 12) & 0xFF); \
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b = ((Pixel >> 2) & 0xFF); \
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a = SDL_expand_byte[6][(Pixel >> 30)]; \
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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 1: \
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Pixel = *((Uint8 *)(buf)); \
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RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
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break; \
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\
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case 2: \
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Pixel = *((Uint16 *)(buf)); \
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RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
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break; \
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\
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case 3: \
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{ \
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Pixel = 0; \
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if (SDL_BYTEORDER == SDL_LIL_ENDIAN) { \
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r = *((buf) + fmt->Rshift / 8); \
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g = *((buf) + fmt->Gshift / 8); \
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b = *((buf) + fmt->Bshift / 8); \
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} else { \
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r = *((buf) + 2 - fmt->Rshift / 8); \
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g = *((buf) + 2 - fmt->Gshift / 8); \
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b = *((buf) + 2 - fmt->Bshift / 8); \
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} \
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a = 0xFF; \
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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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RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a); \
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break; \
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\
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default: \
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/* stop gcc complaints */ \
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Pixel = 0; \
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r = g = b = a = 0; \
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break; \
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} \
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} while (0)
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/* FIXME: this isn't correct, especially for Alpha (maximum != 255) */
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#define PIXEL_FROM_RGBA(Pixel, fmt, r, g, b, a) \
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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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((a >> fmt->Aloss) << fmt->Ashift); \
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}
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#define ASSEMBLE_RGBA(buf, bpp, fmt, r, g, b, a) \
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{ \
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switch (bpp) { \
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case 1: \
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{ \
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Uint8 _pixel; \
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\
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PIXEL_FROM_RGBA(_pixel, fmt, r, g, b, a); \
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*((Uint8 *)(buf)) = _pixel; \
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} break; \
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\
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|
case 2: \
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{ \
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|
Uint16 _pixel; \
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\
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PIXEL_FROM_RGBA(_pixel, fmt, r, g, b, a); \
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*((Uint16 *)(buf)) = _pixel; \
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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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|
} \
|
|
} break; \
|
|
\
|
|
case 4: \
|
|
{ \
|
|
Uint32 _pixel; \
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|
\
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|
PIXEL_FROM_RGBA(_pixel, fmt, r, g, b, a); \
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*((Uint32 *)(buf)) = _pixel; \
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} break; \
|
|
} \
|
|
}
|
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|
|
/* Blend the RGB values of two pixels with an alpha value */
|
|
#define ALPHA_BLEND_RGB(sR, sG, sB, A, dR, dG, dB) \
|
|
do { \
|
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dR = (Uint8)((((int)(sR - dR) * (int)A) / 255) + dR); \
|
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dG = (Uint8)((((int)(sG - dG) * (int)A) / 255) + dG); \
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dB = (Uint8)((((int)(sB - dB) * (int)A) / 255) + dB); \
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} while (0)
|
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|
|
/* Blend the RGBA values of two pixels */
|
|
#define ALPHA_BLEND_RGBA(sR, sG, sB, sA, dR, dG, dB, dA) \
|
|
do { \
|
|
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); \
|
|
dA = (Uint8)((int)sA + dA - ((int)sA * dA) / 255); \
|
|
} 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
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#define USE_DUFFS_LOOP
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#endif
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#ifdef USE_DUFFS_LOOP
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/* 8-times unrolled loop */
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#define DUFFS_LOOP8(pixel_copy_increment, width) \
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{ \
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int n = (width + 7) / 8; \
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switch (width & 7) { \
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case 0: \
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do { \
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pixel_copy_increment; \
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SDL_FALLTHROUGH; \
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case 7: \
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pixel_copy_increment; \
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SDL_FALLTHROUGH; \
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case 6: \
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pixel_copy_increment; \
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SDL_FALLTHROUGH; \
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case 5: \
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pixel_copy_increment; \
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SDL_FALLTHROUGH; \
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case 4: \
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pixel_copy_increment; \
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SDL_FALLTHROUGH; \
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case 3: \
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pixel_copy_increment; \
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SDL_FALLTHROUGH; \
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case 2: \
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pixel_copy_increment; \
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SDL_FALLTHROUGH; \
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case 1: \
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pixel_copy_increment; \
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} while (--n > 0); \
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} \
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}
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/* 4-times unrolled loop */
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#define DUFFS_LOOP4(pixel_copy_increment, width) \
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{ \
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int n = (width + 3) / 4; \
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switch (width & 3) { \
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case 0: \
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do { \
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pixel_copy_increment; \
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SDL_FALLTHROUGH; \
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case 3: \
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pixel_copy_increment; \
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SDL_FALLTHROUGH; \
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case 2: \
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pixel_copy_increment; \
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SDL_FALLTHROUGH; \
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case 1: \
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pixel_copy_increment; \
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} while (--n > 0); \
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} \
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}
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/* Use the 8-times version of the loop by default */
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#define DUFFS_LOOP(pixel_copy_increment, width) \
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DUFFS_LOOP8(pixel_copy_increment, width)
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|
|
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/* Special version of Duff's device for even more optimization */
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#define DUFFS_LOOP_124(pixel_copy_increment1, \
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pixel_copy_increment2, \
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pixel_copy_increment4, width) \
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|
{ \
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|
int n = width; \
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if (n & 1) { \
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pixel_copy_increment1; \
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n -= 1; \
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} \
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if (n & 2) { \
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pixel_copy_increment2; \
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n -= 2; \
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} \
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if (n & 4) { \
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pixel_copy_increment4; \
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n -= 4; \
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} \
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if (n) { \
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n /= 8; \
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do { \
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pixel_copy_increment4; \
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|
pixel_copy_increment4; \
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} while (--n > 0); \
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} \
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}
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#else
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/* Don't use Duff's device to unroll loops */
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#define DUFFS_LOOP(pixel_copy_increment, width) \
|
|
{ \
|
|
int n; \
|
|
for (n = width; n > 0; --n) { \
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pixel_copy_increment; \
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} \
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}
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#define DUFFS_LOOP8(pixel_copy_increment, width) \
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DUFFS_LOOP(pixel_copy_increment, width)
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#define DUFFS_LOOP4(pixel_copy_increment, width) \
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DUFFS_LOOP(pixel_copy_increment, width)
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|
#define DUFFS_LOOP_124(pixel_copy_increment1, \
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|
pixel_copy_increment2, \
|
|
pixel_copy_increment4, width) \
|
|
DUFFS_LOOP(pixel_copy_increment1, width)
|
|
|
|
#endif /* USE_DUFFS_LOOP */
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|
|
|
/* Prevent Visual C++ 6.0 from printing out stupid warnings */
|
|
#if defined(_MSC_VER) && (_MSC_VER >= 600)
|
|
#pragma warning(disable : 4550)
|
|
#endif
|
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#endif /* SDL_blit_h_ */
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