From 30f41c02aec763d32e62351452da9ef582bc3472 Mon Sep 17 00:00:00 2001 From: 3gg <3gg@shellblade.net> Date: Fri, 6 Mar 2026 13:30:59 -0800 Subject: Move contrib libraries to contrib repo --- contrib/SDL-3.2.8/src/video/SDL_blit.h | 751 --------------------------------- 1 file changed, 751 deletions(-) delete mode 100644 contrib/SDL-3.2.8/src/video/SDL_blit.h (limited to 'contrib/SDL-3.2.8/src/video/SDL_blit.h') diff --git a/contrib/SDL-3.2.8/src/video/SDL_blit.h b/contrib/SDL-3.2.8/src/video/SDL_blit.h deleted file mode 100644 index 714feeb..0000000 --- a/contrib/SDL-3.2.8/src/video/SDL_blit.h +++ /dev/null @@ -1,751 +0,0 @@ -/* - Simple DirectMedia Layer - Copyright (C) 1997-2025 Sam Lantinga - - 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" - -#ifndef SDL_blit_h_ -#define SDL_blit_h_ - -// Table to do pixel byte expansion -extern const Uint8 *SDL_expand_byte[9]; -extern const Uint16 SDL_expand_byte_10[]; - -// SDL blit copy flags -#define SDL_COPY_MODULATE_COLOR 0x00000001 -#define SDL_COPY_MODULATE_ALPHA 0x00000002 -#define SDL_COPY_MODULATE_MASK (SDL_COPY_MODULATE_COLOR | SDL_COPY_MODULATE_ALPHA) -#define SDL_COPY_BLEND 0x00000010 -#define SDL_COPY_BLEND_PREMULTIPLIED 0x00000020 -#define SDL_COPY_ADD 0x00000040 -#define SDL_COPY_ADD_PREMULTIPLIED 0x00000080 -#define SDL_COPY_MOD 0x00000100 -#define SDL_COPY_MUL 0x00000200 -#define SDL_COPY_BLEND_MASK (SDL_COPY_BLEND | SDL_COPY_BLEND_PREMULTIPLIED | SDL_COPY_ADD | SDL_COPY_ADD_PREMULTIPLIED | SDL_COPY_MOD | SDL_COPY_MUL) -#define SDL_COPY_COLORKEY 0x00000400 -#define SDL_COPY_NEAREST 0x00000800 -#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_SSE 0x00000002 -#define SDL_CPU_SSE2 0x00000004 -#define SDL_CPU_ALTIVEC_PREFETCH 0x00000008 -#define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000010 - -typedef struct -{ - SDL_Surface *src_surface; - Uint8 *src; - int src_w, src_h; - int src_pitch; - int src_skip; - SDL_Surface *dst_surface; - Uint8 *dst; - int dst_w, dst_h; - int dst_pitch; - int dst_skip; - const SDL_PixelFormatDetails *src_fmt; - const SDL_Palette *src_pal; - const SDL_PixelFormatDetails *dst_fmt; - const SDL_Palette *dst_pal; - Uint8 *table; - SDL_HashTable *palette_map; - int flags; - Uint32 colorkey; - Uint8 r, g, b, a; -} SDL_BlitInfo; - -typedef void (*SDL_BlitFunc)(SDL_BlitInfo *info); - -typedef struct -{ - SDL_PixelFormat src_format; - SDL_PixelFormat dst_format; - int flags; - unsigned int cpu; - SDL_BlitFunc func; -} SDL_BlitFuncEntry; - -typedef bool (SDLCALL *SDL_Blit) (struct SDL_Surface *src, const SDL_Rect *srcrect, struct SDL_Surface *dst, const SDL_Rect *dstrect); - -// Blit mapping definition -typedef struct SDL_BlitMap -{ - 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 bool SDL_CalculateBlit(SDL_Surface *surface, SDL_Surface *dst); - -/* 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 - */ - -#ifdef __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->Rbits][((Pixel & fmt->Rmask) >> fmt->Rshift)]; \ - g = SDL_expand_byte[fmt->Gbits][((Pixel & fmt->Gmask) >> fmt->Gshift)]; \ - b = SDL_expand_byte[fmt->Bbits][((Pixel & fmt->Bmask) >> fmt->Bshift)]; \ - } -#define RGB_FROM_RGB565(Pixel, r, g, b) \ - { \ - r = SDL_expand_byte[5][((Pixel & 0xF800) >> 11)]; \ - g = SDL_expand_byte[6][((Pixel & 0x07E0) >> 5)]; \ - b = SDL_expand_byte[5][(Pixel & 0x001F)]; \ - } -#define RGB_FROM_RGB555(Pixel, r, g, b) \ - { \ - r = SDL_expand_byte[5][((Pixel & 0x7C00) >> 10)]; \ - g = SDL_expand_byte[5][((Pixel & 0x03E0) >> 5)]; \ - b = SDL_expand_byte[5][(Pixel & 0x001F)]; \ - } -#define RGB_FROM_XRGB8888(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 >> (8 - fmt->Rbits)) << fmt->Rshift) | \ - ((g >> (8 - fmt->Gbits)) << fmt->Gshift) | \ - ((b >> (8 - fmt->Bbits)) << fmt->Bshift) | \ - fmt->Amask; \ - } -#define RGB332_FROM_RGB(Pixel, r, g, b) \ - { \ - Pixel = (Uint8)(((r >> 5) << 5) | ((g >> 5) << 2) | (b >> 6)); \ - } -#define RGB565_FROM_RGB(Pixel, r, g, b) \ - { \ - Pixel = (Uint16)(((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3)); \ - } -#define RGB555_FROM_RGB(Pixel, r, g, b) \ - { \ - Pixel = (Uint16)(((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3)); \ - } -#define XRGB8888_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 ARGB2101010_FROM_RGBAFLOAT(Pixel, r, g, b, a) \ - { \ - r = SDL_clamp(r, 0.0f, 1.0f) * 1023.0f; \ - g = SDL_clamp(g, 0.0f, 1.0f) * 1023.0f; \ - b = SDL_clamp(b, 0.0f, 1.0f) * 1023.0f; \ - a = SDL_clamp(a, 0.0f, 1.0f) * 3.0f; \ - Pixel = (((Uint32)SDL_roundf(a)) << 30) | \ - (((Uint32)SDL_roundf(r)) << 20) | \ - (((Uint32)SDL_roundf(g)) << 10) | \ - (Uint32)SDL_roundf(b); \ - } -#define ABGR2101010_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) | (b << 20) | (g << 10) | r; \ - } -#define ABGR2101010_FROM_RGBAFLOAT(Pixel, r, g, b, a) \ - { \ - r = SDL_clamp(r, 0.0f, 1.0f) * 1023.0f; \ - g = SDL_clamp(g, 0.0f, 1.0f) * 1023.0f; \ - b = SDL_clamp(b, 0.0f, 1.0f) * 1023.0f; \ - a = SDL_clamp(a, 0.0f, 1.0f) * 3.0f; \ - Pixel = (((Uint32)SDL_roundf(a)) << 30) | \ - (((Uint32)SDL_roundf(b)) << 20) | \ - (((Uint32)SDL_roundf(g)) << 10) | \ - (Uint32)SDL_roundf(r); \ - } -#define ASSEMBLE_RGB(buf, bpp, fmt, r, g, b) \ - { \ - switch (bpp) { \ - case 1: \ - { \ - Uint8 _pixel; \ - \ - PIXEL_FROM_RGB(_pixel, fmt, r, g, b); \ - *((Uint8 *)(buf)) = _pixel; \ - } break; \ - \ - 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; \ - } \ - } - -// FIXME: Should we rescale alpha into 0..255 here? -#define RGBA_FROM_PIXEL(Pixel, fmt, r, g, b, a) \ - { \ - r = SDL_expand_byte[fmt->Rbits][((Pixel & fmt->Rmask) >> fmt->Rshift)]; \ - g = SDL_expand_byte[fmt->Gbits][((Pixel & fmt->Gmask) >> fmt->Gshift)]; \ - b = SDL_expand_byte[fmt->Bbits][((Pixel & fmt->Bmask) >> fmt->Bshift)]; \ - a = SDL_expand_byte[fmt->Abits][((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[2][(Pixel >> 30)]; \ - } -#define RGBAFLOAT_FROM_ARGB2101010(Pixel, r, g, b, a) \ - { \ - r = (float)((Pixel >> 20) & 0x3FF) / 1023.0f; \ - g = (float)((Pixel >> 10) & 0x3FF) / 1023.0f; \ - b = (float)((Pixel >> 0) & 0x3FF) / 1023.0f; \ - a = (float)(Pixel >> 30) / 3.0f; \ - } -#define RGBA_FROM_ABGR2101010(Pixel, r, g, b, a) \ - { \ - r = ((Pixel >> 2) & 0xFF); \ - g = ((Pixel >> 12) & 0xFF); \ - b = ((Pixel >> 22) & 0xFF); \ - a = SDL_expand_byte[2][(Pixel >> 30)]; \ - } -#define RGBAFLOAT_FROM_ABGR2101010(Pixel, r, g, b, a) \ - { \ - r = (float)((Pixel >> 0) & 0x3FF) / 1023.0f; \ - g = (float)((Pixel >> 10) & 0x3FF) / 1023.0f; \ - b = (float)((Pixel >> 20) & 0x3FF) / 1023.0f; \ - a = (float)(Pixel >> 30) / 3.0f; \ - } -#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 >> (8 - fmt->Rbits)) << fmt->Rshift) | \ - ((g >> (8 - fmt->Gbits)) << fmt->Gshift) | \ - ((b >> (8 - fmt->Bbits)) << fmt->Bshift) | \ - ((a >> (8 - fmt->Abits)) << 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; \ - } \ - } - -// Convert any 32-bit 4-bpp pixel to ARGB format -#define PIXEL_TO_ARGB_PIXEL(src, srcfmt, dst) \ - do { \ - Uint8 a, r, g, b; \ - RGBA_FROM_PIXEL(src, srcfmt, r, g, b, a); \ - dst = a << 24 | r << 16 | g << 8 | b; \ - } while (0) -// Blend a single color channel or alpha value -/* dC = ((sC * sA) + (dC * (255 - sA))) / 255 */ -#define ALPHA_BLEND_CHANNEL(sC, dC, sA) \ - do { \ - Uint16 x; \ - x = ((sC - dC) * sA) + ((dC << 8) - dC); \ - x += 0x1U; \ - x += x >> 8; \ - dC = x >> 8; \ - } while (0) -// Perform a division by 255 after a multiplication of two 8-bit color channels -/* out = (sC * dC) / 255 */ -#define MULT_DIV_255(sC, dC, out) \ - do { \ - Uint16 x = sC * dC; \ - x += 0x1U; \ - x += x >> 8; \ - out = x >> 8; \ - } while (0) -// Blend the RGB values of two pixels with an alpha value -#define ALPHA_BLEND_RGB(sR, sG, sB, A, dR, dG, dB) \ - do { \ - ALPHA_BLEND_CHANNEL(sR, dR, A); \ - ALPHA_BLEND_CHANNEL(sG, dG, A); \ - ALPHA_BLEND_CHANNEL(sB, dB, A); \ - } while (0) - -// Blend two 8888 pixels with the same format -/* Calculates dst = ((src * factor) + (dst * (255 - factor))) / 255 */ -// FIXME: SDL_SIZE_MAX might not be an integer literal -#if defined(SIZE_MAX) && (SIZE_MAX == 0xffffffffffffffff) -#define FACTOR_BLEND_8888(src, dst, factor) \ - do { \ - Uint64 src64 = src; \ - src64 = (src64 | (src64 << 24)) & 0x00FF00FF00FF00FF; \ - \ - Uint64 dst64 = dst; \ - dst64 = (dst64 | (dst64 << 24)) & 0x00FF00FF00FF00FF; \ - \ - dst64 = ((src64 - dst64) * factor) + (dst64 << 8) - dst64; \ - dst64 += 0x0001000100010001; \ - dst64 += (dst64 >> 8) & 0x00FF00FF00FF00FF; \ - dst64 &= 0xFF00FF00FF00FF00; \ - \ - dst = (Uint32)((dst64 >> 8) | (dst64 >> 32)); \ - } while (0) -#else -#define FACTOR_BLEND_8888(src, dst, factor) \ - do { \ - Uint32 src02 = src & 0x00FF00FF; \ - Uint32 dst02 = dst & 0x00FF00FF; \ - \ - Uint32 src13 = (src >> 8) & 0x00FF00FF; \ - Uint32 dst13 = (dst >> 8) & 0x00FF00FF; \ - \ - Uint32 res02 = ((src02 - dst02) * factor) + (dst02 << 8) - dst02; \ - res02 += 0x00010001; \ - res02 += (res02 >> 8) & 0x00FF00FF; \ - res02 = (res02 >> 8) & 0x00FF00FF; \ - \ - Uint32 res13 = ((src13 - dst13) * factor) + (dst13 << 8) - dst13; \ - res13 += 0x00010001; \ - res13 += (res13 >> 8) & 0x00FF00FF; \ - res13 &= 0xFF00FF00; \ - dst = res02 | res13; \ - } while (0) -#endif - -// Alpha blend two 8888 pixels with the same formats. -#define ALPHA_BLEND_8888(src, dst, fmt) \ - do { \ - Uint32 srcA = (src >> fmt->Ashift) & 0xFF; \ - Uint32 tmp = src | fmt->Amask; \ - FACTOR_BLEND_8888(tmp, dst, srcA); \ - } while (0) - -// Alpha blend two 8888 pixels with differing formats. -#define ALPHA_BLEND_SWIZZLE_8888(src, dst, srcfmt, dstfmt) \ - do { \ - Uint32 srcA = (src >> srcfmt->Ashift) & 0xFF; \ - Uint32 tmp = (((src >> srcfmt->Rshift) & 0xFF) << dstfmt->Rshift) | \ - (((src >> srcfmt->Gshift) & 0xFF) << dstfmt->Gshift) | \ - (((src >> srcfmt->Bshift) & 0xFF) << dstfmt->Bshift) | \ - dstfmt->Amask; \ - FACTOR_BLEND_8888(tmp, dst, srcA); \ - } while (0) -// Blend the RGBA values of two pixels -#define ALPHA_BLEND_RGBA(sR, sG, sB, sA, dR, dG, dB, dA) \ - do { \ - ALPHA_BLEND_CHANNEL(sR, dR, sA); \ - ALPHA_BLEND_CHANNEL(sG, dG, sA); \ - ALPHA_BLEND_CHANNEL(sB, dB, sA); \ - ALPHA_BLEND_CHANNEL(255, dA, sA); \ - } 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 - -#define DUFFS_LOOP1(pixel_copy_increment, width) \ - { \ - int n; \ - for (n = width; n > 0; --n) { \ - pixel_copy_increment; \ - } \ - } - -#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; \ - SDL_FALLTHROUGH; \ - case 7: \ - pixel_copy_increment; \ - SDL_FALLTHROUGH; \ - case 6: \ - pixel_copy_increment; \ - SDL_FALLTHROUGH; \ - case 5: \ - pixel_copy_increment; \ - SDL_FALLTHROUGH; \ - case 4: \ - pixel_copy_increment; \ - SDL_FALLTHROUGH; \ - case 3: \ - pixel_copy_increment; \ - SDL_FALLTHROUGH; \ - case 2: \ - pixel_copy_increment; \ - SDL_FALLTHROUGH; \ - 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; \ - SDL_FALLTHROUGH; \ - case 3: \ - pixel_copy_increment; \ - SDL_FALLTHROUGH; \ - case 2: \ - pixel_copy_increment; \ - SDL_FALLTHROUGH; \ - case 1: \ - pixel_copy_increment; \ - } while (--n > 0); \ - } \ - } - -// 2-times unrolled loop -#define DUFFS_LOOP2(pixel_copy_increment, width) \ - { \ - int n = (width + 1) / 2; \ - switch (width & 1) { \ - case 0: \ - do { \ - pixel_copy_increment; \ - SDL_FALLTHROUGH; \ - case 1: \ - pixel_copy_increment; \ - } while (--n > 0); \ - } \ - } - -// Use the 4-times version of the loop by default -#define DUFFS_LOOP(pixel_copy_increment, width) \ - DUFFS_LOOP4(pixel_copy_increment, width) -// Use the 8-times version of the loop for simple routines -#define DUFFS_LOOP_TRIVIAL(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) \ - DUFFS_LOOP1(pixel_copy_increment, width) -#define DUFFS_LOOP_TRIVIAL(pixel_copy_increment, width) \ - DUFFS_LOOP1(pixel_copy_increment, width) -#define DUFFS_LOOP8(pixel_copy_increment, width) \ - DUFFS_LOOP1(pixel_copy_increment, width) -#define DUFFS_LOOP4(pixel_copy_increment, width) \ - DUFFS_LOOP1(pixel_copy_increment, width) -#define DUFFS_LOOP2(pixel_copy_increment, width) \ - DUFFS_LOOP1(pixel_copy_increment, width) -#define DUFFS_LOOP_124(pixel_copy_increment1, \ - pixel_copy_increment2, \ - pixel_copy_increment4, width) \ - DUFFS_LOOP1(pixel_copy_increment1, width) - -#endif // USE_DUFFS_LOOP - -#if defined(_MSC_VER) && (_MSC_VER >= 600) -#pragma warning(disable : 4244) // '=': conversion from 'X' to 'Y', possible loss of data -#endif - -#endif // SDL_blit_h_ -- cgit v1.2.3