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_pixels.c | 1530 ------------------------------ 1 file changed, 1530 deletions(-) delete mode 100644 contrib/SDL-3.2.8/src/video/SDL_pixels.c (limited to 'contrib/SDL-3.2.8/src/video/SDL_pixels.c') diff --git a/contrib/SDL-3.2.8/src/video/SDL_pixels.c b/contrib/SDL-3.2.8/src/video/SDL_pixels.c deleted file mode 100644 index 5fede22..0000000 --- a/contrib/SDL-3.2.8/src/video/SDL_pixels.c +++ /dev/null @@ -1,1530 +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" - -// General (mostly internal) pixel/color manipulation routines for SDL - -#include "SDL_sysvideo.h" -#include "SDL_pixels_c.h" -#include "SDL_RLEaccel_c.h" - -// Lookup tables to expand partial bytes to the full 0..255 range - -static const Uint8 lookup_0[] = { - 255 -}; - -static const Uint8 lookup_1[] = { - 0, 255 -}; - -static const Uint8 lookup_2[] = { - 0, 85, 170, 255 -}; - -static const Uint8 lookup_3[] = { - 0, 36, 72, 109, 145, 182, 218, 255 -}; - -static const Uint8 lookup_4[] = { - 0, 17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187, 204, 221, 238, 255 -}; - -static const Uint8 lookup_5[] = { - 0, 8, 16, 24, 32, 41, 49, 57, 65, 74, 82, 90, 98, 106, 115, 123, 131, 139, 148, 156, 164, 172, 180, 189, 197, 205, 213, 222, 230, 238, 246, 255 -}; - -static const Uint8 lookup_6[] = { - 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125, 129, 133, 137, 141, 145, 149, 153, 157, 161, 165, 170, 174, 178, 182, 186, 190, 194, 198, 202, 206, 210, 214, 218, 222, 226, 230, 234, 238, 242, 246, 250, 255 -}; - -static const Uint8 lookup_7[] = { - 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132, 134, 136, 138, 140, 142, 144, 146, 148, 150, 152, 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 184, 186, 188, 190, 192, 194, 196, 198, 200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, 242, 244, 246, 248, 250, 252, 255 -}; - -static const Uint8 lookup_8[] = { - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255 -}; - -const Uint8 *SDL_expand_byte[9] = { - lookup_0, - lookup_1, - lookup_2, - lookup_3, - lookup_4, - lookup_5, - lookup_6, - lookup_7, - lookup_8 -}; - -// Lookup tables to expand 8 bit to 10 bit range -const Uint16 SDL_expand_byte_10[] = { - 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 173, 177, 181, 185, 189, 193, 197, 201, 205, 209, 213, 217, 221, 225, 229, 233, 237, 241, 245, 249, 253, 257, 261, 265, 269, 273, 277, 281, 285, 289, 293, 297, 301, 305, 309, 313, 317, 321, 325, 329, 333, 337, 341, 345, 349, 353, 357, 361, 365, 369, 373, 377, 381, 385, 389, 393, 397, 401, 405, 409, 413, 417, 421, 425, 429, 433, 437, 441, 445, 449, 453, 457, 461, 465, 469, 473, 477, 481, 485, 489, 493, 497, 501, 505, 509, 514, 518, 522, 526, 530, 534, 538, 542, 546, 550, 554, 558, 562, 566, 570, 574, 578, 582, 586, 590, 594, 598, 602, 606, 610, 614, 618, 622, 626, 630, 634, 638, 642, 646, 650, 654, 658, 662, 666, 670, 674, 678, 682, 686, 690, 694, 698, 702, 706, 710, 714, 718, 722, 726, 730, 734, 738, 742, 746, 750, 754, 758, 762, 766, 770, 774, 778, 782, 786, 790, 794, 798, 802, 806, 810, 814, 818, 822, 826, 830, 834, 838, 842, 846, 850, 855, 859, 863, 867, 871, 875, 879, 883, 887, 891, 895, 899, 903, 907, 911, 915, 919, 923, 927, 931, 935, 939, 943, 947, 951, 955, 959, 963, 967, 971, 975, 979, 983, 987, 991, 995, 999, 1003, 1007, 1011, 1015, 1019, 1023 -}; -SDL_COMPILE_TIME_ASSERT(SDL_expand_byte_10_size, SDL_arraysize(SDL_expand_byte_10) == (1 << 8)); - - -// Helper functions - -#define CASE(X) \ - case X: \ - return #X; -const char *SDL_GetPixelFormatName(SDL_PixelFormat format) -{ - switch (format) { - - CASE(SDL_PIXELFORMAT_INDEX1LSB) - CASE(SDL_PIXELFORMAT_INDEX1MSB) - CASE(SDL_PIXELFORMAT_INDEX2LSB) - CASE(SDL_PIXELFORMAT_INDEX2MSB) - CASE(SDL_PIXELFORMAT_INDEX4LSB) - CASE(SDL_PIXELFORMAT_INDEX4MSB) - CASE(SDL_PIXELFORMAT_INDEX8) - CASE(SDL_PIXELFORMAT_RGB332) - CASE(SDL_PIXELFORMAT_XRGB4444) - CASE(SDL_PIXELFORMAT_XBGR4444) - CASE(SDL_PIXELFORMAT_XRGB1555) - CASE(SDL_PIXELFORMAT_XBGR1555) - CASE(SDL_PIXELFORMAT_ARGB4444) - CASE(SDL_PIXELFORMAT_RGBA4444) - CASE(SDL_PIXELFORMAT_ABGR4444) - CASE(SDL_PIXELFORMAT_BGRA4444) - CASE(SDL_PIXELFORMAT_ARGB1555) - CASE(SDL_PIXELFORMAT_RGBA5551) - CASE(SDL_PIXELFORMAT_ABGR1555) - CASE(SDL_PIXELFORMAT_BGRA5551) - CASE(SDL_PIXELFORMAT_RGB565) - CASE(SDL_PIXELFORMAT_BGR565) - CASE(SDL_PIXELFORMAT_RGB24) - CASE(SDL_PIXELFORMAT_BGR24) - CASE(SDL_PIXELFORMAT_XRGB8888) - CASE(SDL_PIXELFORMAT_RGBX8888) - CASE(SDL_PIXELFORMAT_XBGR8888) - CASE(SDL_PIXELFORMAT_BGRX8888) - CASE(SDL_PIXELFORMAT_ARGB8888) - CASE(SDL_PIXELFORMAT_RGBA8888) - CASE(SDL_PIXELFORMAT_ABGR8888) - CASE(SDL_PIXELFORMAT_BGRA8888) - CASE(SDL_PIXELFORMAT_XRGB2101010) - CASE(SDL_PIXELFORMAT_XBGR2101010) - CASE(SDL_PIXELFORMAT_ARGB2101010) - CASE(SDL_PIXELFORMAT_ABGR2101010) - CASE(SDL_PIXELFORMAT_RGB48) - CASE(SDL_PIXELFORMAT_BGR48) - CASE(SDL_PIXELFORMAT_RGBA64) - CASE(SDL_PIXELFORMAT_ARGB64) - CASE(SDL_PIXELFORMAT_BGRA64) - CASE(SDL_PIXELFORMAT_ABGR64) - CASE(SDL_PIXELFORMAT_RGB48_FLOAT) - CASE(SDL_PIXELFORMAT_BGR48_FLOAT) - CASE(SDL_PIXELFORMAT_RGBA64_FLOAT) - CASE(SDL_PIXELFORMAT_ARGB64_FLOAT) - CASE(SDL_PIXELFORMAT_BGRA64_FLOAT) - CASE(SDL_PIXELFORMAT_ABGR64_FLOAT) - CASE(SDL_PIXELFORMAT_RGB96_FLOAT) - CASE(SDL_PIXELFORMAT_BGR96_FLOAT) - CASE(SDL_PIXELFORMAT_RGBA128_FLOAT) - CASE(SDL_PIXELFORMAT_ARGB128_FLOAT) - CASE(SDL_PIXELFORMAT_BGRA128_FLOAT) - CASE(SDL_PIXELFORMAT_ABGR128_FLOAT) - CASE(SDL_PIXELFORMAT_YV12) - CASE(SDL_PIXELFORMAT_IYUV) - CASE(SDL_PIXELFORMAT_YUY2) - CASE(SDL_PIXELFORMAT_UYVY) - CASE(SDL_PIXELFORMAT_YVYU) - CASE(SDL_PIXELFORMAT_NV12) - CASE(SDL_PIXELFORMAT_NV21) - CASE(SDL_PIXELFORMAT_P010) - CASE(SDL_PIXELFORMAT_EXTERNAL_OES) - CASE(SDL_PIXELFORMAT_MJPG) - - default: - return "SDL_PIXELFORMAT_UNKNOWN"; - } -} -#undef CASE - -bool SDL_GetMasksForPixelFormat(SDL_PixelFormat format, int *bpp, Uint32 *Rmask, Uint32 *Gmask, Uint32 *Bmask, Uint32 *Amask) -{ - Uint32 masks[4]; - -#ifdef SDL_HAVE_YUV - // Partial support for SDL_Surface with FOURCC - if (SDL_ISPIXELFORMAT_FOURCC(format)) { - // Not a format that uses masks - *Rmask = *Gmask = *Bmask = *Amask = 0; - // however, some of these are packed formats, and can legit declare bits-per-pixel! - switch (format) { - case SDL_PIXELFORMAT_YUY2: - case SDL_PIXELFORMAT_UYVY: - case SDL_PIXELFORMAT_YVYU: - *bpp = 32; - break; - default: - *bpp = 0; // oh well. - } - return true; - } -#else - if (SDL_ISPIXELFORMAT_FOURCC(format)) { - return SDL_SetError("SDL not built with YUV support"); - } -#endif - - // Initialize the values here - if (SDL_BYTESPERPIXEL(format) <= 2) { - *bpp = SDL_BITSPERPIXEL(format); - } else { - *bpp = SDL_BYTESPERPIXEL(format) * 8; - } - *Rmask = *Gmask = *Bmask = *Amask = 0; - - if (format == SDL_PIXELFORMAT_RGB24) { -#if SDL_BYTEORDER == SDL_BIG_ENDIAN - *Rmask = 0x00FF0000; - *Gmask = 0x0000FF00; - *Bmask = 0x000000FF; -#else - *Rmask = 0x000000FF; - *Gmask = 0x0000FF00; - *Bmask = 0x00FF0000; -#endif - return true; - } - - if (format == SDL_PIXELFORMAT_BGR24) { -#if SDL_BYTEORDER == SDL_BIG_ENDIAN - *Rmask = 0x000000FF; - *Gmask = 0x0000FF00; - *Bmask = 0x00FF0000; -#else - *Rmask = 0x00FF0000; - *Gmask = 0x0000FF00; - *Bmask = 0x000000FF; -#endif - return true; - } - - if (SDL_PIXELTYPE(format) != SDL_PIXELTYPE_PACKED8 && - SDL_PIXELTYPE(format) != SDL_PIXELTYPE_PACKED16 && - SDL_PIXELTYPE(format) != SDL_PIXELTYPE_PACKED32) { - // Not a format that uses masks - return true; - } - - switch (SDL_PIXELLAYOUT(format)) { - case SDL_PACKEDLAYOUT_332: - masks[0] = 0x00000000; - masks[1] = 0x000000E0; - masks[2] = 0x0000001C; - masks[3] = 0x00000003; - break; - case SDL_PACKEDLAYOUT_4444: - masks[0] = 0x0000F000; - masks[1] = 0x00000F00; - masks[2] = 0x000000F0; - masks[3] = 0x0000000F; - break; - case SDL_PACKEDLAYOUT_1555: - masks[0] = 0x00008000; - masks[1] = 0x00007C00; - masks[2] = 0x000003E0; - masks[3] = 0x0000001F; - break; - case SDL_PACKEDLAYOUT_5551: - masks[0] = 0x0000F800; - masks[1] = 0x000007C0; - masks[2] = 0x0000003E; - masks[3] = 0x00000001; - break; - case SDL_PACKEDLAYOUT_565: - masks[0] = 0x00000000; - masks[1] = 0x0000F800; - masks[2] = 0x000007E0; - masks[3] = 0x0000001F; - break; - case SDL_PACKEDLAYOUT_8888: - masks[0] = 0xFF000000; - masks[1] = 0x00FF0000; - masks[2] = 0x0000FF00; - masks[3] = 0x000000FF; - break; - case SDL_PACKEDLAYOUT_2101010: - masks[0] = 0xC0000000; - masks[1] = 0x3FF00000; - masks[2] = 0x000FFC00; - masks[3] = 0x000003FF; - break; - case SDL_PACKEDLAYOUT_1010102: - masks[0] = 0xFFC00000; - masks[1] = 0x003FF000; - masks[2] = 0x00000FFC; - masks[3] = 0x00000003; - break; - default: - return SDL_SetError("Unknown pixel format"); - } - - switch (SDL_PIXELORDER(format)) { - case SDL_PACKEDORDER_XRGB: - *Rmask = masks[1]; - *Gmask = masks[2]; - *Bmask = masks[3]; - break; - case SDL_PACKEDORDER_RGBX: - *Rmask = masks[0]; - *Gmask = masks[1]; - *Bmask = masks[2]; - break; - case SDL_PACKEDORDER_ARGB: - *Amask = masks[0]; - *Rmask = masks[1]; - *Gmask = masks[2]; - *Bmask = masks[3]; - break; - case SDL_PACKEDORDER_RGBA: - *Rmask = masks[0]; - *Gmask = masks[1]; - *Bmask = masks[2]; - *Amask = masks[3]; - break; - case SDL_PACKEDORDER_XBGR: - *Bmask = masks[1]; - *Gmask = masks[2]; - *Rmask = masks[3]; - break; - case SDL_PACKEDORDER_BGRX: - *Bmask = masks[0]; - *Gmask = masks[1]; - *Rmask = masks[2]; - break; - case SDL_PACKEDORDER_BGRA: - *Bmask = masks[0]; - *Gmask = masks[1]; - *Rmask = masks[2]; - *Amask = masks[3]; - break; - case SDL_PACKEDORDER_ABGR: - *Amask = masks[0]; - *Bmask = masks[1]; - *Gmask = masks[2]; - *Rmask = masks[3]; - break; - default: - return SDL_SetError("Unknown pixel format"); - } - return true; -} - -SDL_PixelFormat SDL_GetPixelFormatForMasks(int bpp, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask) -{ - switch (bpp) { - case 1: - // SDL defaults to MSB ordering - return SDL_PIXELFORMAT_INDEX1MSB; - case 2: - // SDL defaults to MSB ordering - return SDL_PIXELFORMAT_INDEX2MSB; - case 4: - // SDL defaults to MSB ordering - return SDL_PIXELFORMAT_INDEX4MSB; - case 8: - if (Rmask == 0xE0 && - Gmask == 0x1C && - Bmask == 0x03 && - Amask == 0x00) { - return SDL_PIXELFORMAT_RGB332; - } - return SDL_PIXELFORMAT_INDEX8; - case 12: - if (Rmask == 0) { - return SDL_PIXELFORMAT_XRGB4444; - } - if (Rmask == 0x0F00 && - Gmask == 0x00F0 && - Bmask == 0x000F && - Amask == 0x0000) { - return SDL_PIXELFORMAT_XRGB4444; - } - if (Rmask == 0x000F && - Gmask == 0x00F0 && - Bmask == 0x0F00 && - Amask == 0x0000) { - return SDL_PIXELFORMAT_XBGR4444; - } - break; - case 15: - if (Rmask == 0) { - return SDL_PIXELFORMAT_XRGB1555; - } - SDL_FALLTHROUGH; - case 16: - if (Rmask == 0) { - return SDL_PIXELFORMAT_RGB565; - } - if (Rmask == 0x7C00 && - Gmask == 0x03E0 && - Bmask == 0x001F && - Amask == 0x0000) { - return SDL_PIXELFORMAT_XRGB1555; - } - if (Rmask == 0x001F && - Gmask == 0x03E0 && - Bmask == 0x7C00 && - Amask == 0x0000) { - return SDL_PIXELFORMAT_XBGR1555; - } - if (Rmask == 0x0F00 && - Gmask == 0x00F0 && - Bmask == 0x000F && - Amask == 0xF000) { - return SDL_PIXELFORMAT_ARGB4444; - } - if (Rmask == 0xF000 && - Gmask == 0x0F00 && - Bmask == 0x00F0 && - Amask == 0x000F) { - return SDL_PIXELFORMAT_RGBA4444; - } - if (Rmask == 0x000F && - Gmask == 0x00F0 && - Bmask == 0x0F00 && - Amask == 0xF000) { - return SDL_PIXELFORMAT_ABGR4444; - } - if (Rmask == 0x00F0 && - Gmask == 0x0F00 && - Bmask == 0xF000 && - Amask == 0x000F) { - return SDL_PIXELFORMAT_BGRA4444; - } - if (Rmask == 0x7C00 && - Gmask == 0x03E0 && - Bmask == 0x001F && - Amask == 0x8000) { - return SDL_PIXELFORMAT_ARGB1555; - } - if (Rmask == 0xF800 && - Gmask == 0x07C0 && - Bmask == 0x003E && - Amask == 0x0001) { - return SDL_PIXELFORMAT_RGBA5551; - } - if (Rmask == 0x001F && - Gmask == 0x03E0 && - Bmask == 0x7C00 && - Amask == 0x8000) { - return SDL_PIXELFORMAT_ABGR1555; - } - if (Rmask == 0x003E && - Gmask == 0x07C0 && - Bmask == 0xF800 && - Amask == 0x0001) { - return SDL_PIXELFORMAT_BGRA5551; - } - if (Rmask == 0xF800 && - Gmask == 0x07E0 && - Bmask == 0x001F && - Amask == 0x0000) { - return SDL_PIXELFORMAT_RGB565; - } - if (Rmask == 0x001F && - Gmask == 0x07E0 && - Bmask == 0xF800 && - Amask == 0x0000) { - return SDL_PIXELFORMAT_BGR565; - } - if (Rmask == 0x003F && - Gmask == 0x07C0 && - Bmask == 0xF800 && - Amask == 0x0000) { - // Technically this would be BGR556, but Witek says this works in bug 3158 - return SDL_PIXELFORMAT_RGB565; - } - break; - case 24: - switch (Rmask) { - case 0: - case 0x00FF0000: -#if SDL_BYTEORDER == SDL_BIG_ENDIAN - return SDL_PIXELFORMAT_RGB24; -#else - return SDL_PIXELFORMAT_BGR24; -#endif - case 0x000000FF: -#if SDL_BYTEORDER == SDL_BIG_ENDIAN - return SDL_PIXELFORMAT_BGR24; -#else - return SDL_PIXELFORMAT_RGB24; -#endif - } - break; - case 30: - if (Rmask == 0x3FF00000 && - Gmask == 0x000FFC00 && - Bmask == 0x000003FF && - Amask == 0x00000000) { - return SDL_PIXELFORMAT_XRGB2101010; - } - if (Rmask == 0x000003FF && - Gmask == 0x000FFC00 && - Bmask == 0x3FF00000 && - Amask == 0x00000000) { - return SDL_PIXELFORMAT_XBGR2101010; - } - break; - case 32: - if (Rmask == 0) { - return SDL_PIXELFORMAT_XRGB8888; - } - if (Rmask == 0x00FF0000 && - Gmask == 0x0000FF00 && - Bmask == 0x000000FF && - Amask == 0x00000000) { - return SDL_PIXELFORMAT_XRGB8888; - } - if (Rmask == 0xFF000000 && - Gmask == 0x00FF0000 && - Bmask == 0x0000FF00 && - Amask == 0x00000000) { - return SDL_PIXELFORMAT_RGBX8888; - } - if (Rmask == 0x000000FF && - Gmask == 0x0000FF00 && - Bmask == 0x00FF0000 && - Amask == 0x00000000) { - return SDL_PIXELFORMAT_XBGR8888; - } - if (Rmask == 0x0000FF00 && - Gmask == 0x00FF0000 && - Bmask == 0xFF000000 && - Amask == 0x00000000) { - return SDL_PIXELFORMAT_BGRX8888; - } - if (Rmask == 0x00FF0000 && - Gmask == 0x0000FF00 && - Bmask == 0x000000FF && - Amask == 0xFF000000) { - return SDL_PIXELFORMAT_ARGB8888; - } - if (Rmask == 0xFF000000 && - Gmask == 0x00FF0000 && - Bmask == 0x0000FF00 && - Amask == 0x000000FF) { - return SDL_PIXELFORMAT_RGBA8888; - } - if (Rmask == 0x000000FF && - Gmask == 0x0000FF00 && - Bmask == 0x00FF0000 && - Amask == 0xFF000000) { - return SDL_PIXELFORMAT_ABGR8888; - } - if (Rmask == 0x0000FF00 && - Gmask == 0x00FF0000 && - Bmask == 0xFF000000 && - Amask == 0x000000FF) { - return SDL_PIXELFORMAT_BGRA8888; - } - if (Rmask == 0x3FF00000 && - Gmask == 0x000FFC00 && - Bmask == 0x000003FF && - Amask == 0x00000000) { - return SDL_PIXELFORMAT_XRGB2101010; - } - if (Rmask == 0x000003FF && - Gmask == 0x000FFC00 && - Bmask == 0x3FF00000 && - Amask == 0x00000000) { - return SDL_PIXELFORMAT_XBGR2101010; - } - if (Rmask == 0x3FF00000 && - Gmask == 0x000FFC00 && - Bmask == 0x000003FF && - Amask == 0xC0000000) { - return SDL_PIXELFORMAT_ARGB2101010; - } - if (Rmask == 0x000003FF && - Gmask == 0x000FFC00 && - Bmask == 0x3FF00000 && - Amask == 0xC0000000) { - return SDL_PIXELFORMAT_ABGR2101010; - } - break; - } - return SDL_PIXELFORMAT_UNKNOWN; -} - -static SDL_InitState SDL_format_details_init; -static SDL_HashTable *SDL_format_details; - -static bool SDL_InitPixelFormatDetails(SDL_PixelFormatDetails *details, SDL_PixelFormat format) -{ - int bpp; - Uint32 Rmask, Gmask, Bmask, Amask; - Uint32 mask; - - if (!SDL_GetMasksForPixelFormat(format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) { - return false; - } - - // Set up the format - SDL_zerop(details); - details->format = format; - details->bits_per_pixel = (Uint8)bpp; - details->bytes_per_pixel = (Uint8)((bpp + 7) / 8); - - details->Rmask = Rmask; - details->Rshift = 0; - details->Rbits = 0; - if (Rmask) { - for (mask = Rmask; !(mask & 0x01); mask >>= 1) { - ++details->Rshift; - } - for (; (mask & 0x01); mask >>= 1) { - ++details->Rbits; - } - } - - details->Gmask = Gmask; - details->Gshift = 0; - details->Gbits = 0; - if (Gmask) { - for (mask = Gmask; !(mask & 0x01); mask >>= 1) { - ++details->Gshift; - } - for (; (mask & 0x01); mask >>= 1) { - ++details->Gbits; - } - } - - details->Bmask = Bmask; - details->Bshift = 0; - details->Bbits = 0; - if (Bmask) { - for (mask = Bmask; !(mask & 0x01); mask >>= 1) { - ++details->Bshift; - } - for (; (mask & 0x01); mask >>= 1) { - ++details->Bbits; - } - } - - details->Amask = Amask; - details->Ashift = 0; - details->Abits = 0; - if (Amask) { - for (mask = Amask; !(mask & 0x01); mask >>= 1) { - ++details->Ashift; - } - for (; (mask & 0x01); mask >>= 1) { - ++details->Abits; - } - } - - return true; -} - -const SDL_PixelFormatDetails *SDL_GetPixelFormatDetails(SDL_PixelFormat format) -{ - SDL_PixelFormatDetails *details; - - if (SDL_ShouldInit(&SDL_format_details_init)) { - SDL_format_details = SDL_CreateHashTable(0, true, SDL_HashID, SDL_KeyMatchID, SDL_DestroyHashValue, NULL); - if (!SDL_format_details) { - SDL_SetInitialized(&SDL_format_details_init, false); - return NULL; - } - SDL_SetInitialized(&SDL_format_details_init, true); - } - - if (SDL_FindInHashTable(SDL_format_details, (const void *)(uintptr_t)format, (const void **)&details)) { - return details; - } - - // Allocate an empty pixel format structure, and initialize it - details = (SDL_PixelFormatDetails *)SDL_malloc(sizeof(*details)); - if (!details) { - return NULL; - } - - if (!SDL_InitPixelFormatDetails(details, format)) { - SDL_free(details); - return NULL; - } - - if (!SDL_InsertIntoHashTable(SDL_format_details, (const void *)(uintptr_t)format, (void *)details, false)) { - SDL_free(details); - // uh...did another thread beat us to inserting this? - if (SDL_FindInHashTable(SDL_format_details, (const void *)(uintptr_t)format, (const void **)&details)) { - return details; - } - return NULL; // oh well. - } - - return details; -} - -void SDL_QuitPixelFormatDetails(void) -{ - if (SDL_ShouldQuit(&SDL_format_details_init)) { - SDL_DestroyHashTable(SDL_format_details); - SDL_format_details = NULL; - SDL_SetInitialized(&SDL_format_details_init, false); - } -} - -SDL_Colorspace SDL_GetDefaultColorspaceForFormat(SDL_PixelFormat format) -{ - if (SDL_ISPIXELFORMAT_FOURCC(format)) { - if (format == SDL_PIXELFORMAT_MJPG) { - return SDL_COLORSPACE_SRGB; - } else if (format == SDL_PIXELFORMAT_P010) { - return SDL_COLORSPACE_HDR10; - } else { - return SDL_COLORSPACE_YUV_DEFAULT; - } - } else if (SDL_ISPIXELFORMAT_FLOAT(format)) { - return SDL_COLORSPACE_SRGB_LINEAR; - } else if (SDL_ISPIXELFORMAT_10BIT(format)) { - return SDL_COLORSPACE_HDR10; - } else { - return SDL_COLORSPACE_RGB_DEFAULT; - } -} - -float SDL_sRGBtoLinear(float v) -{ - if (v <= 0.04045f) { - v = (v / 12.92f); - } else { - v = SDL_powf((v + 0.055f) / 1.055f, 2.4f); - } - return v; -} - -float SDL_sRGBfromLinear(float v) -{ - if (v <= 0.0031308f) { - v = (v * 12.92f); - } else { - v = (SDL_powf(v, 1.0f / 2.4f) * 1.055f - 0.055f); - } - return v; -} - -float SDL_PQtoNits(float v) -{ - const float c1 = 0.8359375f; - const float c2 = 18.8515625f; - const float c3 = 18.6875f; - const float oo_m1 = 1.0f / 0.1593017578125f; - const float oo_m2 = 1.0f / 78.84375f; - - float num = SDL_max(SDL_powf(v, oo_m2) - c1, 0.0f); - float den = c2 - c3 * SDL_powf(v, oo_m2); - return 10000.0f * SDL_powf(num / den, oo_m1); -} - -float SDL_PQfromNits(float v) -{ - const float c1 = 0.8359375f; - const float c2 = 18.8515625f; - const float c3 = 18.6875f; - const float m1 = 0.1593017578125f; - const float m2 = 78.84375f; - - float y = SDL_clamp(v / 10000.0f, 0.0f, 1.0f); - float num = c1 + c2 * SDL_powf(y, m1); - float den = 1.0f + c3 * SDL_powf(y, m1); - return SDL_powf(num / den, m2); -} - -/* This is a helpful tool for deriving these: - * https://kdashg.github.io/misc/colors/from-coeffs.html - */ -static const float mat_BT601_Limited_8bit[] = { - -0.0627451017f, -0.501960814f, -0.501960814f, 0.0f, // offset - 1.1644f, 0.0000f, 1.5960f, 0.0f, // Rcoeff - 1.1644f, -0.3918f, -0.8130f, 0.0f, // Gcoeff - 1.1644f, 2.0172f, 0.0000f, 0.0f, // Bcoeff -}; - -static const float mat_BT601_Full_8bit[] = { - 0.0f, -0.501960814f, -0.501960814f, 0.0f, // offset - 1.0000f, 0.0000f, 1.4075f, 0.0f, // Rcoeff - 1.0000f, -0.3455f, -0.7169f, 0.0f, // Gcoeff - 1.0000f, 1.7790f, 0.0000f, 0.0f, // Bcoeff -}; - -static const float mat_BT709_Limited_8bit[] = { - -0.0627451017f, -0.501960814f, -0.501960814f, 0.0f, // offset - 1.1644f, 0.0000f, 1.7927f, 0.0f, // Rcoeff - 1.1644f, -0.2132f, -0.5329f, 0.0f, // Gcoeff - 1.1644f, 2.1124f, 0.0000f, 0.0f, // Bcoeff -}; - -static const float mat_BT709_Full_8bit[] = { - 0.0f, -0.501960814f, -0.501960814f, 0.0f, // offset - 1.0000f, 0.0000f, 1.5810f, 0.0f, // Rcoeff - 1.0000f, -0.1881f, -0.4700f, 0.0f, // Gcoeff - 1.0000f, 1.8629f, 0.0000f, 0.0f, // Bcoeff -}; - -static const float mat_BT2020_Limited_10bit[] = { - -0.062561095f, -0.500488759f, -0.500488759f, 0.0f, // offset - 1.1678f, 0.0000f, 1.6836f, 0.0f, // Rcoeff - 1.1678f, -0.1879f, -0.6523f, 0.0f, // Gcoeff - 1.1678f, 2.1481f, 0.0000f, 0.0f, // Bcoeff -}; - -static const float mat_BT2020_Full_10bit[] = { - 0.0f, -0.500488759f, -0.500488759f, 0.0f, // offset - 1.0000f, 0.0000f, 1.4760f, 0.0f, // Rcoeff - 1.0000f, -0.1647f, -0.5719f, 0.0f, // Gcoeff - 1.0000f, 1.8832f, 0.0000f, 0.0f, // Bcoeff -}; - -static const float *SDL_GetBT601ConversionMatrix( SDL_Colorspace colorspace ) -{ - switch (SDL_COLORSPACERANGE(colorspace)) { - case SDL_COLOR_RANGE_LIMITED: - case SDL_COLOR_RANGE_UNKNOWN: - return mat_BT601_Limited_8bit; - case SDL_COLOR_RANGE_FULL: - return mat_BT601_Full_8bit; - default: - break; - } - return NULL; -} - -static const float *SDL_GetBT709ConversionMatrix(SDL_Colorspace colorspace) -{ - switch (SDL_COLORSPACERANGE(colorspace)) { - case SDL_COLOR_RANGE_LIMITED: - case SDL_COLOR_RANGE_UNKNOWN: - return mat_BT709_Limited_8bit; - case SDL_COLOR_RANGE_FULL: - return mat_BT709_Full_8bit; - default: - break; - } - return NULL; -} - -static const float *SDL_GetBT2020ConversionMatrix(SDL_Colorspace colorspace) -{ - switch (SDL_COLORSPACERANGE(colorspace)) { - case SDL_COLOR_RANGE_LIMITED: - case SDL_COLOR_RANGE_UNKNOWN: - return mat_BT2020_Limited_10bit; - case SDL_COLOR_RANGE_FULL: - return mat_BT2020_Full_10bit; - default: - break; - } - return NULL; -} - -const float *SDL_GetYCbCRtoRGBConversionMatrix(SDL_Colorspace colorspace, int w, int h, int bits_per_pixel) -{ - const int YUV_SD_THRESHOLD = 576; - - switch (SDL_COLORSPACEMATRIX(colorspace)) { - case SDL_MATRIX_COEFFICIENTS_BT601: - case SDL_MATRIX_COEFFICIENTS_BT470BG: - return SDL_GetBT601ConversionMatrix(colorspace); - - case SDL_MATRIX_COEFFICIENTS_BT709: - return SDL_GetBT709ConversionMatrix(colorspace); - - case SDL_MATRIX_COEFFICIENTS_BT2020_NCL: - return SDL_GetBT2020ConversionMatrix(colorspace); - - case SDL_MATRIX_COEFFICIENTS_UNSPECIFIED: - switch (bits_per_pixel) { - case 8: - if (h <= YUV_SD_THRESHOLD) { - return SDL_GetBT601ConversionMatrix(colorspace); - } else { - return SDL_GetBT709ConversionMatrix(colorspace); - } - case 10: - case 16: - return SDL_GetBT2020ConversionMatrix(colorspace); - default: - break; - } - break; - default: - break; - } - return NULL; -} - -const float *SDL_GetColorPrimariesConversionMatrix(SDL_ColorPrimaries src, SDL_ColorPrimaries dst) -{ - /* Conversion matrices generated using gamescope color helpers and the primaries definitions at: - * https://www.itu.int/rec/T-REC-H.273-201612-S/en - * - * You can also generate these online using the RGB-XYZ matrix calculator, and then multiplying - * XYZ_to_dst * src_to_XYZ to get the combined conversion matrix: - * https://www.russellcottrell.com/photo/matrixCalculator.htm - */ - static const float mat601to709[] = { - 0.939542f, 0.050181f, 0.010277f, - 0.017772f, 0.965793f, 0.016435f, - -0.001622f, -0.004370f, 1.005991f, - }; - static const float mat601to2020[] = { - 0.595254f, 0.349314f, 0.055432f, - 0.081244f, 0.891503f, 0.027253f, - 0.015512f, 0.081912f, 0.902576f, - }; - static const float mat709to601[] = { - 1.065379f, -0.055401f, -0.009978f, - -0.019633f, 1.036363f, -0.016731f, - 0.001632f, 0.004412f, 0.993956f, - }; - static const float mat709to2020[] = { - 0.627404f, 0.329283f, 0.043313f, - 0.069097f, 0.919541f, 0.011362f, - 0.016391f, 0.088013f, 0.895595f, - }; - static const float mat2020to601[] = { - 1.776133f, -0.687820f, -0.088313f, - -0.161376f, 1.187315f, -0.025940f, - -0.015881f, -0.095931f, 1.111812f, - }; - static const float mat2020to709[] = { - 1.660496f, -0.587656f, -0.072840f, - -0.124547f, 1.132895f, -0.008348f, - -0.018154f, -0.100597f, 1.118751f - }; - static const float matSMPTE431to709[] = { - 1.120713f, -0.234649f, 0.000000f, - -0.038478f, 1.087034f, 0.000000f, - -0.017967f, -0.082030f, 0.954576f, - }; - static const float matSMPTE431to2020[] = { - 0.689691f, 0.207169f, 0.041346f, - 0.041852f, 0.982426f, 0.010846f, - -0.001107f, 0.018362f, 0.854914f, - }; - static const float matSMPTE432to709[] = { - 1.224940f, -0.224940f, -0.000000f, - -0.042057f, 1.042057f, 0.000000f, - -0.019638f, -0.078636f, 1.098273f, - }; - static const float matSMPTE432to2020[] = { - 0.753833f, 0.198597f, 0.047570f, - 0.045744f, 0.941777f, 0.012479f, - -0.001210f, 0.017602f, 0.983609f, - }; - - switch (dst) { - case SDL_COLOR_PRIMARIES_BT601: - case SDL_COLOR_PRIMARIES_SMPTE240: - switch (src) { - case SDL_COLOR_PRIMARIES_BT709: - return mat709to601; - case SDL_COLOR_PRIMARIES_BT2020: - return mat2020to601; - default: - break; - } - break; - case SDL_COLOR_PRIMARIES_BT709: - switch (src) { - case SDL_COLOR_PRIMARIES_BT601: - case SDL_COLOR_PRIMARIES_SMPTE240: - return mat601to709; - case SDL_COLOR_PRIMARIES_BT2020: - return mat2020to709; - case SDL_COLOR_PRIMARIES_SMPTE431: - return matSMPTE431to709; - case SDL_COLOR_PRIMARIES_SMPTE432: - return matSMPTE432to709; - default: - break; - } - break; - case SDL_COLOR_PRIMARIES_BT2020: - switch (src) { - case SDL_COLOR_PRIMARIES_BT601: - case SDL_COLOR_PRIMARIES_SMPTE240: - return mat601to2020; - case SDL_COLOR_PRIMARIES_BT709: - return mat709to2020; - case SDL_COLOR_PRIMARIES_SMPTE431: - return matSMPTE431to2020; - case SDL_COLOR_PRIMARIES_SMPTE432: - return matSMPTE432to2020; - default: - break; - } - break; - default: - break; - } - return NULL; -} - -void SDL_ConvertColorPrimaries(float *fR, float *fG, float *fB, const float *matrix) -{ - float v[3]; - - v[0] = *fR; - v[1] = *fG; - v[2] = *fB; - - *fR = matrix[0 * 3 + 0] * v[0] + matrix[0 * 3 + 1] * v[1] + matrix[0 * 3 + 2] * v[2]; - *fG = matrix[1 * 3 + 0] * v[0] + matrix[1 * 3 + 1] * v[1] + matrix[1 * 3 + 2] * v[2]; - *fB = matrix[2 * 3 + 0] * v[0] + matrix[2 * 3 + 1] * v[1] + matrix[2 * 3 + 2] * v[2]; -} - -SDL_Palette *SDL_CreatePalette(int ncolors) -{ - SDL_Palette *palette; - - // Input validation - if (ncolors < 1) { - SDL_InvalidParamError("ncolors"); - return NULL; - } - - palette = (SDL_Palette *)SDL_malloc(sizeof(*palette)); - if (!palette) { - return NULL; - } - palette->colors = (SDL_Color *)SDL_malloc(ncolors * sizeof(*palette->colors)); - if (!palette->colors) { - SDL_free(palette); - return NULL; - } - palette->ncolors = ncolors; - palette->version = 1; - palette->refcount = 1; - - SDL_memset(palette->colors, 0xFF, ncolors * sizeof(*palette->colors)); - - return palette; -} - -bool SDL_SetPaletteColors(SDL_Palette *palette, const SDL_Color *colors, int firstcolor, int ncolors) -{ - bool result = true; - - // Verify the parameters - if (!palette) { - return false; - } - if (ncolors > (palette->ncolors - firstcolor)) { - ncolors = (palette->ncolors - firstcolor); - result = false; - } - - if (colors != (palette->colors + firstcolor)) { - SDL_memcpy(palette->colors + firstcolor, colors, - ncolors * sizeof(*colors)); - } - ++palette->version; - if (!palette->version) { - palette->version = 1; - } - - return result; -} - -void SDL_DestroyPalette(SDL_Palette *palette) -{ - if (!palette) { - return; - } - if (--palette->refcount > 0) { - return; - } - SDL_free(palette->colors); - SDL_free(palette); -} - -/* - * Calculate an 8-bit (3 red, 3 green, 2 blue) dithered palette of colors - */ -void SDL_DitherPalette(SDL_Palette *palette) -{ - int i; - if (palette->ncolors != 256) { - return; // only 8bpp supported right now - } - - for (i = 0; i < palette->ncolors; i++) { - int r, g, b; - /* map each bit field to the full [0, 255] interval, - so 0 is mapped to (0, 0, 0) and 255 to (255, 255, 255) */ - r = i & 0xe0; - r |= r >> 3 | r >> 6; - palette->colors[i].r = (Uint8)r; - g = (i << 3) & 0xe0; - g |= g >> 3 | g >> 6; - palette->colors[i].g = (Uint8)g; - b = i & 0x3; - b |= b << 2; - b |= b << 4; - palette->colors[i].b = (Uint8)b; - palette->colors[i].a = SDL_ALPHA_OPAQUE; - } -} - -/* - * Match an RGB value to a particular palette index - */ -Uint8 SDL_FindColor(const SDL_Palette *pal, Uint8 r, Uint8 g, Uint8 b, Uint8 a) -{ - // Do colorspace distance matching - unsigned int smallest; - unsigned int distance; - int rd, gd, bd, ad; - int i; - Uint8 pixel = 0; - - smallest = ~0U; - for (i = 0; i < pal->ncolors; ++i) { - rd = pal->colors[i].r - r; - gd = pal->colors[i].g - g; - bd = pal->colors[i].b - b; - ad = pal->colors[i].a - a; - distance = (rd * rd) + (gd * gd) + (bd * bd) + (ad * ad); - if (distance < smallest) { - pixel = (Uint8)i; - if (distance == 0) { // Perfect match! - break; - } - smallest = distance; - } - } - return pixel; -} - -Uint8 SDL_LookupRGBAColor(SDL_HashTable *palette_map, Uint32 pixel, const SDL_Palette *pal) -{ - Uint8 color_index = 0; - const void *value; - if (SDL_FindInHashTable(palette_map, (const void *)(uintptr_t)pixel, &value)) { - color_index = (Uint8)(uintptr_t)value; - } else { - Uint8 r = (Uint8)((pixel >> 24) & 0xFF); - Uint8 g = (Uint8)((pixel >> 16) & 0xFF); - Uint8 b = (Uint8)((pixel >> 8) & 0xFF); - Uint8 a = (Uint8)((pixel >> 0) & 0xFF); - color_index = SDL_FindColor(pal, r, g, b, a); - SDL_InsertIntoHashTable(palette_map, (const void *)(uintptr_t)pixel, (const void *)(uintptr_t)color_index, true); - } - return color_index; -} - -// Tell whether palette is opaque, and if it has an alpha_channel -void SDL_DetectPalette(const SDL_Palette *pal, bool *is_opaque, bool *has_alpha_channel) -{ - int i; - - { - bool all_opaque = true; - for (i = 0; i < pal->ncolors; i++) { - Uint8 alpha_value = pal->colors[i].a; - if (alpha_value != SDL_ALPHA_OPAQUE) { - all_opaque = false; - break; - } - } - - if (all_opaque) { - // Palette is opaque, with an alpha channel - *is_opaque = true; - *has_alpha_channel = true; - return; - } - } - - { - bool all_transparent = true; - for (i = 0; i < pal->ncolors; i++) { - Uint8 alpha_value = pal->colors[i].a; - if (alpha_value != SDL_ALPHA_TRANSPARENT) { - all_transparent = false; - break; - } - } - - if (all_transparent) { - // Palette is opaque, without an alpha channel - *is_opaque = true; - *has_alpha_channel = false; - return; - } - } - - // Palette has alpha values - *is_opaque = false; - *has_alpha_channel = true; -} - -// Find the opaque pixel value corresponding to an RGB triple -Uint32 SDL_MapRGB(const SDL_PixelFormatDetails *format, const SDL_Palette *palette, Uint8 r, Uint8 g, Uint8 b) -{ - if (!format) { - SDL_InvalidParamError("format"); - return 0; - } - - if (SDL_ISPIXELFORMAT_INDEXED(format->format)) { - if (!palette) { - SDL_InvalidParamError("palette"); - return 0; - } - return SDL_FindColor(palette, r, g, b, SDL_ALPHA_OPAQUE); - } - - if (SDL_ISPIXELFORMAT_10BIT(format->format)) { - return (((Uint32)SDL_expand_byte_10[r]) << format->Rshift) | - (((Uint32)SDL_expand_byte_10[g]) << format->Gshift) | - (((Uint32)SDL_expand_byte_10[b]) << format->Bshift) | - format->Amask; - } else { - return ((Uint32)(r >> (8 - format->Rbits))) << format->Rshift | - ((Uint32)(g >> (8 - format->Gbits))) << format->Gshift | - ((Uint32)(b >> (8 - format->Bbits))) << format->Bshift | - format->Amask; - } -} - -// Find the pixel value corresponding to an RGBA quadruple -Uint32 SDL_MapRGBA(const SDL_PixelFormatDetails *format, const SDL_Palette *palette, Uint8 r, Uint8 g, Uint8 b, Uint8 a) -{ - if (!format) { - SDL_InvalidParamError("format"); - return 0; - } - - if (SDL_ISPIXELFORMAT_INDEXED(format->format)) { - if (!palette) { - SDL_InvalidParamError("palette"); - return 0; - } - return SDL_FindColor(palette, r, g, b, a); - } - - if (SDL_ISPIXELFORMAT_10BIT(format->format)) { - return (((Uint32)SDL_expand_byte_10[r]) << format->Rshift) | - (((Uint32)SDL_expand_byte_10[g]) << format->Gshift) | - (((Uint32)SDL_expand_byte_10[b]) << format->Bshift) | - ((((Uint32)(a >> (8 - format->Abits))) << format->Ashift) & format->Amask); - } else { - return ((Uint32)(r >> (8 - format->Rbits))) << format->Rshift | - ((Uint32)(g >> (8 - format->Gbits))) << format->Gshift | - ((Uint32)(b >> (8 - format->Bbits))) << format->Bshift | - ((((Uint32)(a >> (8 - format->Abits))) << format->Ashift) & format->Amask); - } -} - -void SDL_GetRGB(Uint32 pixel, const SDL_PixelFormatDetails *format, const SDL_Palette *palette, Uint8 *r, Uint8 *g, Uint8 *b) -{ - Uint8 unused; - - if (!r) { - r = &unused; - } - if (!g) { - g = &unused; - } - if (!b) { - b = &unused; - } - - if (!format) { - *r = *g = *b = 0; - return; - } - - if (SDL_ISPIXELFORMAT_INDEXED(format->format)) { - if (palette && pixel < (unsigned)palette->ncolors) { - *r = palette->colors[pixel].r; - *g = palette->colors[pixel].g; - *b = palette->colors[pixel].b; - } else { - *r = *g = *b = 0; - } - return; - } - - if (SDL_ISPIXELFORMAT_10BIT(format->format)) { - unsigned v; - v = (pixel & format->Rmask) >> format->Rshift; - *r = (Uint8)(v >> 2); - v = (pixel & format->Gmask) >> format->Gshift; - *g = (Uint8)(v >> 2); - v = (pixel & format->Bmask) >> format->Bshift; - *b = (Uint8)(v >> 2); - } else { - unsigned v; - v = (pixel & format->Rmask) >> format->Rshift; - *r = SDL_expand_byte[format->Rbits][v]; - v = (pixel & format->Gmask) >> format->Gshift; - *g = SDL_expand_byte[format->Gbits][v]; - v = (pixel & format->Bmask) >> format->Bshift; - *b = SDL_expand_byte[format->Bbits][v]; - } -} - -void SDL_GetRGBA(Uint32 pixel, const SDL_PixelFormatDetails *format, const SDL_Palette *palette, Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a) -{ - Uint8 unused; - - if (!r) { - r = &unused; - } - if (!g) { - g = &unused; - } - if (!b) { - b = &unused; - } - if (!a) { - a = &unused; - } - - if (!format) { - *r = *g = *b = *a = 0; - return; - } - - if (SDL_ISPIXELFORMAT_INDEXED(format->format)) { - if (palette && pixel < (unsigned)palette->ncolors) { - *r = palette->colors[pixel].r; - *g = palette->colors[pixel].g; - *b = palette->colors[pixel].b; - *a = palette->colors[pixel].a; - } else { - *r = *g = *b = *a = 0; - } - return; - } - - if (SDL_ISPIXELFORMAT_10BIT(format->format)) { - unsigned v; - v = (pixel & format->Rmask) >> format->Rshift; - *r = (Uint8)(v >> 2); - v = (pixel & format->Gmask) >> format->Gshift; - *g = (Uint8)(v >> 2); - v = (pixel & format->Bmask) >> format->Bshift; - *b = (Uint8)(v >> 2); - v = (pixel & format->Amask) >> format->Ashift; - *a = SDL_expand_byte[format->Abits][v]; - } else { - unsigned v; - v = (pixel & format->Rmask) >> format->Rshift; - *r = SDL_expand_byte[format->Rbits][v]; - v = (pixel & format->Gmask) >> format->Gshift; - *g = SDL_expand_byte[format->Gbits][v]; - v = (pixel & format->Bmask) >> format->Bshift; - *b = SDL_expand_byte[format->Bbits][v]; - v = (pixel & format->Amask) >> format->Ashift; - *a = SDL_expand_byte[format->Abits][v]; - } -} - -// Map from Palette to Palette -static Uint8 *Map1to1(const SDL_Palette *src, const SDL_Palette *dst, int *identical) -{ - Uint8 *map; - int i; - - if (identical) { - if (src->ncolors <= dst->ncolors) { - // If an identical palette, no need to map - if (src == dst || - (SDL_memcmp(src->colors, dst->colors, - src->ncolors * sizeof(SDL_Color)) == 0)) { - *identical = 1; - return NULL; - } - } - *identical = 0; - } - map = (Uint8 *)SDL_calloc(256, sizeof(Uint8)); - if (!map) { - return NULL; - } - for (i = 0; i < src->ncolors; ++i) { - map[i] = SDL_FindColor(dst, - src->colors[i].r, src->colors[i].g, - src->colors[i].b, src->colors[i].a); - } - return map; -} - -// Map from Palette to BitField -static Uint8 *Map1toN(const SDL_Palette *pal, Uint8 Rmod, Uint8 Gmod, Uint8 Bmod, Uint8 Amod, const SDL_PixelFormatDetails *dst) -{ - Uint8 *map; - int i; - int bpp; - - if (!pal) { - SDL_SetError("src does not have a palette set"); - return NULL; - } - - bpp = ((SDL_BYTESPERPIXEL(dst->format) == 3) ? 4 : SDL_BYTESPERPIXEL(dst->format)); - map = (Uint8 *)SDL_calloc(256, bpp); - if (!map) { - return NULL; - } - - // We memory copy to the pixel map so the endianness is preserved - for (i = 0; i < pal->ncolors; ++i) { - Uint8 R = (Uint8)((pal->colors[i].r * Rmod) / 255); - Uint8 G = (Uint8)((pal->colors[i].g * Gmod) / 255); - Uint8 B = (Uint8)((pal->colors[i].b * Bmod) / 255); - Uint8 A = (Uint8)((pal->colors[i].a * Amod) / 255); - ASSEMBLE_RGBA(&map[i * bpp], SDL_BYTESPERPIXEL(dst->format), dst, (Uint32)R, - (Uint32)G, (Uint32)B, (Uint32)A); - } - return map; -} - -bool SDL_ValidateMap(SDL_Surface *src, SDL_Surface *dst) -{ - SDL_BlitMap *map = &src->map; - - if (map->info.dst_fmt != dst->fmt || - map->info.dst_pal != dst->palette || - (dst->palette && - map->dst_palette_version != dst->palette->version) || - (src->palette && - map->src_palette_version != src->palette->version)) { - if (!SDL_MapSurface(src, dst)) { - return false; - } - // just here for debugging - // printf - // ("src = 0x%08X src->flags = %08X map->info.flags = %08x\ndst = 0x%08X dst->flags = %08X dst->map.info.flags = %08X\nmap->blit = 0x%08x\n", - // src, dst->flags, map->info.flags, dst, dst->flags, - // dst->map.info.flags, map->blit); - } else { - map->info.dst_surface = dst; - } - return true; -} - -void SDL_InvalidateMap(SDL_BlitMap *map) -{ - map->info.dst_fmt = NULL; - map->info.dst_pal = NULL; - map->src_palette_version = 0; - map->dst_palette_version = 0; - if (map->info.table) { - SDL_free(map->info.table); - map->info.table = NULL; - } - if (map->info.palette_map) { - SDL_DestroyHashTable(map->info.palette_map); - map->info.palette_map = NULL; - } -} - -bool SDL_MapSurface(SDL_Surface *src, SDL_Surface *dst) -{ - const SDL_PixelFormatDetails *srcfmt; - const SDL_Palette *srcpal; - const SDL_PixelFormatDetails *dstfmt; - const SDL_Palette *dstpal; - SDL_BlitMap *map; - - // Clear out any previous mapping - map = &src->map; -#ifdef SDL_HAVE_RLE - if (src->internal_flags & SDL_INTERNAL_SURFACE_RLEACCEL) { - SDL_UnRLESurface(src, true); - } -#endif - SDL_InvalidateMap(map); - - // Figure out what kind of mapping we're doing - map->identity = 0; - srcfmt = src->fmt; - srcpal = src->palette; - dstfmt = dst->fmt; - dstpal = dst->palette; - if (SDL_ISPIXELFORMAT_INDEXED(srcfmt->format)) { - if (SDL_ISPIXELFORMAT_INDEXED(dstfmt->format)) { - // Palette --> Palette - if (srcpal && dstpal) { - map->info.table = Map1to1(srcpal, dstpal, &map->identity); - } else { - map->identity = 1; - } - if (!map->identity) { - if (!map->info.table) { - return false; - } - } - if (srcfmt->bits_per_pixel != dstfmt->bits_per_pixel) { - map->identity = 0; - } - } else { - // Palette --> BitField - map->info.table = - Map1toN(srcpal, src->map.info.r, src->map.info.g, - src->map.info.b, src->map.info.a, dstfmt); - if (!map->info.table) { - return false; - } - } - } else { - if (SDL_ISPIXELFORMAT_INDEXED(dstfmt->format)) { - // BitField --> Palette - map->info.palette_map = SDL_CreateHashTable(0, false, SDL_HashID, SDL_KeyMatchID, NULL, NULL); - } else { - // BitField --> BitField - if (srcfmt == dstfmt) { - map->identity = 1; - } - } - } - - if (dstpal) { - map->dst_palette_version = dstpal->version; - } else { - map->dst_palette_version = 0; - } - - if (srcpal) { - map->src_palette_version = srcpal->version; - } else { - map->src_palette_version = 0; - } - - // Choose your blitters wisely - return SDL_CalculateBlit(src, dst); -} - -- cgit v1.2.3