2ba76dbe80
SDL_Surface has been simplified and internal details are no longer in the public structure. The `format` member of SDL_Surface is now an enumerated pixel format value. You can get the full details of the pixel format by calling `SDL_GetPixelFormatDetails(surface->format)`. You can get the palette associated with the surface by calling SDL_GetSurfacePalette(). You can get the clip rectangle by calling SDL_GetSurfaceClipRect(). SDL_PixelFormat has been renamed SDL_PixelFormatDetails and just describes the pixel format, it does not include a palette for indexed pixel types. SDL_PixelFormatEnum has been renamed SDL_PixelFormat and is used instead of Uint32 for API functions that refer to pixel format by enumerated value. SDL_MapRGB(), SDL_MapRGBA(), SDL_GetRGB(), and SDL_GetRGBA() take an optional palette parameter for indexed color lookups.
1531 lines
47 KiB
C
1531 lines
47 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2024 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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/* General (mostly internal) pixel/color manipulation routines for SDL */
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#include "SDL_sysvideo.h"
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#include "SDL_blit.h"
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#include "SDL_pixels_c.h"
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#include "SDL_RLEaccel_c.h"
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#include "../SDL_hashtable.h"
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#include "../SDL_list.h"
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/* Lookup tables to expand partial bytes to the full 0..255 range */
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static const Uint8 lookup_0[] = {
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255
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};
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static const Uint8 lookup_1[] = {
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0, 255
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};
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static const Uint8 lookup_2[] = {
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0, 85, 170, 255
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};
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static const Uint8 lookup_3[] = {
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0, 36, 72, 109, 145, 182, 218, 255
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};
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static const Uint8 lookup_4[] = {
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0, 17, 34, 51, 68, 85, 102, 119, 136, 153, 170, 187, 204, 221, 238, 255
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};
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static const Uint8 lookup_5[] = {
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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
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};
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static const Uint8 lookup_6[] = {
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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
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};
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static const Uint8 lookup_7[] = {
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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
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};
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static const Uint8 lookup_8[] = {
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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
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};
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const Uint8 *SDL_expand_byte[9] = {
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lookup_0,
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lookup_1,
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lookup_2,
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lookup_3,
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lookup_4,
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lookup_5,
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lookup_6,
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lookup_7,
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lookup_8
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};
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/* Lookup tables to expand 8 bit to 10 bit range */
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const Uint16 SDL_expand_byte_10[] = {
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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
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};
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SDL_COMPILE_TIME_ASSERT(SDL_expand_byte_10_size, SDL_arraysize(SDL_expand_byte_10) == (1 << 8));
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/* Helper functions */
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// This doesn't need SDL_FreeLater since it returns string literals.
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#define CASE(X) \
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case X: \
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return #X;
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const char *SDL_GetPixelFormatName(SDL_PixelFormat format)
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{
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switch (format) {
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CASE(SDL_PIXELFORMAT_INDEX1LSB)
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CASE(SDL_PIXELFORMAT_INDEX1MSB)
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CASE(SDL_PIXELFORMAT_INDEX2LSB)
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CASE(SDL_PIXELFORMAT_INDEX2MSB)
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CASE(SDL_PIXELFORMAT_INDEX4LSB)
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CASE(SDL_PIXELFORMAT_INDEX4MSB)
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CASE(SDL_PIXELFORMAT_INDEX8)
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CASE(SDL_PIXELFORMAT_RGB332)
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CASE(SDL_PIXELFORMAT_XRGB4444)
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CASE(SDL_PIXELFORMAT_XBGR4444)
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CASE(SDL_PIXELFORMAT_XRGB1555)
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CASE(SDL_PIXELFORMAT_XBGR1555)
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CASE(SDL_PIXELFORMAT_ARGB4444)
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CASE(SDL_PIXELFORMAT_RGBA4444)
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CASE(SDL_PIXELFORMAT_ABGR4444)
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CASE(SDL_PIXELFORMAT_BGRA4444)
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CASE(SDL_PIXELFORMAT_ARGB1555)
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CASE(SDL_PIXELFORMAT_RGBA5551)
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CASE(SDL_PIXELFORMAT_ABGR1555)
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CASE(SDL_PIXELFORMAT_BGRA5551)
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CASE(SDL_PIXELFORMAT_RGB565)
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CASE(SDL_PIXELFORMAT_BGR565)
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CASE(SDL_PIXELFORMAT_RGB24)
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CASE(SDL_PIXELFORMAT_BGR24)
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CASE(SDL_PIXELFORMAT_XRGB8888)
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CASE(SDL_PIXELFORMAT_RGBX8888)
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CASE(SDL_PIXELFORMAT_XBGR8888)
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CASE(SDL_PIXELFORMAT_BGRX8888)
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CASE(SDL_PIXELFORMAT_ARGB8888)
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CASE(SDL_PIXELFORMAT_RGBA8888)
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CASE(SDL_PIXELFORMAT_ABGR8888)
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CASE(SDL_PIXELFORMAT_BGRA8888)
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CASE(SDL_PIXELFORMAT_XRGB2101010)
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CASE(SDL_PIXELFORMAT_XBGR2101010)
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CASE(SDL_PIXELFORMAT_ARGB2101010)
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CASE(SDL_PIXELFORMAT_ABGR2101010)
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CASE(SDL_PIXELFORMAT_RGB48)
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CASE(SDL_PIXELFORMAT_BGR48)
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CASE(SDL_PIXELFORMAT_RGBA64)
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CASE(SDL_PIXELFORMAT_ARGB64)
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CASE(SDL_PIXELFORMAT_BGRA64)
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CASE(SDL_PIXELFORMAT_ABGR64)
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CASE(SDL_PIXELFORMAT_RGB48_FLOAT)
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CASE(SDL_PIXELFORMAT_BGR48_FLOAT)
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CASE(SDL_PIXELFORMAT_RGBA64_FLOAT)
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CASE(SDL_PIXELFORMAT_ARGB64_FLOAT)
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CASE(SDL_PIXELFORMAT_BGRA64_FLOAT)
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CASE(SDL_PIXELFORMAT_ABGR64_FLOAT)
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CASE(SDL_PIXELFORMAT_RGB96_FLOAT)
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CASE(SDL_PIXELFORMAT_BGR96_FLOAT)
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CASE(SDL_PIXELFORMAT_RGBA128_FLOAT)
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CASE(SDL_PIXELFORMAT_ARGB128_FLOAT)
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CASE(SDL_PIXELFORMAT_BGRA128_FLOAT)
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CASE(SDL_PIXELFORMAT_ABGR128_FLOAT)
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CASE(SDL_PIXELFORMAT_YV12)
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CASE(SDL_PIXELFORMAT_IYUV)
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CASE(SDL_PIXELFORMAT_YUY2)
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CASE(SDL_PIXELFORMAT_UYVY)
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CASE(SDL_PIXELFORMAT_YVYU)
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CASE(SDL_PIXELFORMAT_NV12)
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CASE(SDL_PIXELFORMAT_NV21)
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CASE(SDL_PIXELFORMAT_P010)
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CASE(SDL_PIXELFORMAT_EXTERNAL_OES)
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default:
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return "SDL_PIXELFORMAT_UNKNOWN";
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}
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}
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#undef CASE
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int SDL_GetMasksForPixelFormat(SDL_PixelFormat format, int *bpp, Uint32 *Rmask, Uint32 *Gmask, Uint32 *Bmask, Uint32 *Amask)
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{
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Uint32 masks[4];
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#if SDL_HAVE_YUV
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/* Partial support for SDL_Surface with FOURCC */
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if (SDL_ISPIXELFORMAT_FOURCC(format)) {
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/* Not a format that uses masks */
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*Rmask = *Gmask = *Bmask = *Amask = 0;
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// however, some of these are packed formats, and can legit declare bits-per-pixel!
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switch (format) {
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case SDL_PIXELFORMAT_YUY2:
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case SDL_PIXELFORMAT_UYVY:
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case SDL_PIXELFORMAT_YVYU:
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*bpp = 32;
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break;
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default:
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*bpp = 0; // oh well.
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}
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return 0;
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}
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#else
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if (SDL_ISPIXELFORMAT_FOURCC(format)) {
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return SDL_SetError("SDL not built with YUV support");
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}
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#endif
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/* Initialize the values here */
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if (SDL_BYTESPERPIXEL(format) <= 2) {
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*bpp = SDL_BITSPERPIXEL(format);
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} else {
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*bpp = SDL_BYTESPERPIXEL(format) * 8;
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}
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*Rmask = *Gmask = *Bmask = *Amask = 0;
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if (format == SDL_PIXELFORMAT_RGB24) {
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#if SDL_BYTEORDER == SDL_BIG_ENDIAN
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*Rmask = 0x00FF0000;
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*Gmask = 0x0000FF00;
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*Bmask = 0x000000FF;
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#else
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*Rmask = 0x000000FF;
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*Gmask = 0x0000FF00;
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*Bmask = 0x00FF0000;
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#endif
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return 0;
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}
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if (format == SDL_PIXELFORMAT_BGR24) {
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#if SDL_BYTEORDER == SDL_BIG_ENDIAN
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*Rmask = 0x000000FF;
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*Gmask = 0x0000FF00;
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*Bmask = 0x00FF0000;
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#else
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*Rmask = 0x00FF0000;
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*Gmask = 0x0000FF00;
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*Bmask = 0x000000FF;
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#endif
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return 0;
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}
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if (SDL_PIXELTYPE(format) != SDL_PIXELTYPE_PACKED8 &&
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SDL_PIXELTYPE(format) != SDL_PIXELTYPE_PACKED16 &&
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SDL_PIXELTYPE(format) != SDL_PIXELTYPE_PACKED32) {
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/* Not a format that uses masks */
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return 0;
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}
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switch (SDL_PIXELLAYOUT(format)) {
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case SDL_PACKEDLAYOUT_332:
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masks[0] = 0x00000000;
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masks[1] = 0x000000E0;
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masks[2] = 0x0000001C;
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masks[3] = 0x00000003;
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break;
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case SDL_PACKEDLAYOUT_4444:
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masks[0] = 0x0000F000;
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masks[1] = 0x00000F00;
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masks[2] = 0x000000F0;
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masks[3] = 0x0000000F;
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break;
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case SDL_PACKEDLAYOUT_1555:
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masks[0] = 0x00008000;
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masks[1] = 0x00007C00;
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masks[2] = 0x000003E0;
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masks[3] = 0x0000001F;
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break;
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case SDL_PACKEDLAYOUT_5551:
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masks[0] = 0x0000F800;
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masks[1] = 0x000007C0;
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masks[2] = 0x0000003E;
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masks[3] = 0x00000001;
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break;
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case SDL_PACKEDLAYOUT_565:
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masks[0] = 0x00000000;
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masks[1] = 0x0000F800;
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masks[2] = 0x000007E0;
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masks[3] = 0x0000001F;
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break;
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case SDL_PACKEDLAYOUT_8888:
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masks[0] = 0xFF000000;
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masks[1] = 0x00FF0000;
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masks[2] = 0x0000FF00;
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masks[3] = 0x000000FF;
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break;
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case SDL_PACKEDLAYOUT_2101010:
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masks[0] = 0xC0000000;
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masks[1] = 0x3FF00000;
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masks[2] = 0x000FFC00;
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masks[3] = 0x000003FF;
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break;
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case SDL_PACKEDLAYOUT_1010102:
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masks[0] = 0xFFC00000;
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masks[1] = 0x003FF000;
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masks[2] = 0x00000FFC;
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masks[3] = 0x00000003;
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break;
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default:
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return SDL_SetError("Unknown pixel format");
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}
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switch (SDL_PIXELORDER(format)) {
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case SDL_PACKEDORDER_XRGB:
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*Rmask = masks[1];
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*Gmask = masks[2];
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*Bmask = masks[3];
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break;
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case SDL_PACKEDORDER_RGBX:
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*Rmask = masks[0];
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*Gmask = masks[1];
|
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*Bmask = masks[2];
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break;
|
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case SDL_PACKEDORDER_ARGB:
|
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*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];
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|
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 0;
|
|
}
|
|
|
|
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 &&
|
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Gmask == 0x00F0 &&
|
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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_HashTable *SDL_format_details;
|
|
static SDL_Mutex *SDL_format_details_lock;
|
|
|
|
static int 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) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
/* Set up the format */
|
|
SDL_zerop(details);
|
|
details->format = format;
|
|
details->bits_per_pixel = (Uint8)bpp;
|
|
SDL_assert(SDL_BITSPERPIXEL(format) == details->bits_per_pixel);
|
|
details->bytes_per_pixel = (Uint8)((bpp + 7) / 8);
|
|
SDL_assert(SDL_BYTESPERPIXEL(format) == details->bytes_per_pixel);
|
|
|
|
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 0;
|
|
}
|
|
|
|
const SDL_PixelFormatDetails *SDL_GetPixelFormatDetails(SDL_PixelFormat format)
|
|
{
|
|
SDL_PixelFormatDetails *details;
|
|
|
|
if (!SDL_format_details_lock) {
|
|
SDL_format_details_lock = SDL_CreateMutex();
|
|
}
|
|
|
|
SDL_LockMutex(SDL_format_details_lock);
|
|
|
|
if (!SDL_format_details) {
|
|
SDL_format_details = SDL_CreateHashTable(NULL, 8, SDL_HashID, SDL_KeyMatchID, SDL_NukeFreeValue, SDL_FALSE);
|
|
}
|
|
|
|
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) {
|
|
goto done;
|
|
}
|
|
|
|
if (SDL_InitPixelFormatDetails(details, format) < 0) {
|
|
SDL_free(details);
|
|
details = NULL;
|
|
goto done;
|
|
}
|
|
|
|
if (!SDL_InsertIntoHashTable(SDL_format_details, (const void *)(uintptr_t)format, (void *)details)) {
|
|
SDL_free(details);
|
|
details = NULL;
|
|
goto done;
|
|
}
|
|
|
|
done:
|
|
SDL_UnlockMutex(SDL_format_details_lock);
|
|
|
|
return details;
|
|
}
|
|
|
|
void SDL_QuitPixelFormatDetails(void)
|
|
{
|
|
if (SDL_format_details) {
|
|
SDL_DestroyHashTable(SDL_format_details);
|
|
SDL_format_details = NULL;
|
|
}
|
|
if (SDL_format_details_lock) {
|
|
SDL_DestroyMutex(SDL_format_details_lock);
|
|
SDL_format_details_lock = NULL;
|
|
}
|
|
}
|
|
|
|
SDL_Colorspace SDL_GetDefaultColorspaceForFormat(SDL_PixelFormat format)
|
|
{
|
|
if (SDL_ISPIXELFORMAT_FOURCC(format)) {
|
|
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, 1.4020f, 0.0f, /* Rcoeff */
|
|
1.0000f, -0.3441f, -0.7141f, 0.0f, /* Gcoeff */
|
|
1.0000f, 1.7720f, 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, 1.5748f, 0.0f, /* Rcoeff */
|
|
1.0000f, -0.1873f, -0.4681f, 0.0f, /* Gcoeff */
|
|
1.0000f, 1.8556f, 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;
|
|
}
|
|
|
|
int SDL_SetPaletteColors(SDL_Palette *palette, const SDL_Color *colors,
|
|
int firstcolor, int ncolors)
|
|
{
|
|
int status = 0;
|
|
|
|
/* Verify the parameters */
|
|
if (!palette) {
|
|
return -1;
|
|
}
|
|
if (ncolors > (palette->ncolors - firstcolor)) {
|
|
ncolors = (palette->ncolors - firstcolor);
|
|
status = -1;
|
|
}
|
|
|
|
if (colors != (palette->colors + firstcolor)) {
|
|
SDL_memcpy(palette->colors + firstcolor, colors,
|
|
ncolors * sizeof(*colors));
|
|
}
|
|
++palette->version;
|
|
if (!palette->version) {
|
|
palette->version = 1;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
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_DitherColors(SDL_Color *colors, int bpp)
|
|
{
|
|
int i;
|
|
if (bpp != 8) {
|
|
return; /* only 8bpp supported right now */
|
|
}
|
|
|
|
for (i = 0; i < 256; 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;
|
|
colors[i].r = (Uint8)r;
|
|
g = (i << 3) & 0xe0;
|
|
g |= g >> 3 | g >> 6;
|
|
colors[i].g = (Uint8)g;
|
|
b = i & 0x3;
|
|
b |= b << 2;
|
|
b |= b << 4;
|
|
colors[i].b = (Uint8)b;
|
|
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;
|
|
}
|
|
|
|
/* Tell whether palette is opaque, and if it has an alpha_channel */
|
|
void SDL_DetectPalette(const SDL_Palette *pal, SDL_bool *is_opaque, SDL_bool *has_alpha_channel)
|
|
{
|
|
int i;
|
|
|
|
{
|
|
SDL_bool all_opaque = SDL_TRUE;
|
|
for (i = 0; i < pal->ncolors; i++) {
|
|
Uint8 alpha_value = pal->colors[i].a;
|
|
if (alpha_value != SDL_ALPHA_OPAQUE) {
|
|
all_opaque = SDL_FALSE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (all_opaque) {
|
|
/* Palette is opaque, with an alpha channel */
|
|
*is_opaque = SDL_TRUE;
|
|
*has_alpha_channel = SDL_TRUE;
|
|
return;
|
|
}
|
|
}
|
|
|
|
{
|
|
SDL_bool all_transparent = SDL_TRUE;
|
|
for (i = 0; i < pal->ncolors; i++) {
|
|
Uint8 alpha_value = pal->colors[i].a;
|
|
if (alpha_value != SDL_ALPHA_TRANSPARENT) {
|
|
all_transparent = SDL_FALSE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (all_transparent) {
|
|
/* Palette is opaque, without an alpha channel */
|
|
*is_opaque = SDL_TRUE;
|
|
*has_alpha_channel = SDL_FALSE;
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* Palette has alpha values */
|
|
*is_opaque = SDL_FALSE;
|
|
*has_alpha_channel = SDL_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;
|
|
|
|
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;
|
|
}
|
|
|
|
/* Map from BitField to Dithered-Palette to Palette */
|
|
static Uint8 *MapNto1(const SDL_PixelFormatDetails *src, const SDL_Palette *pal, int *identical)
|
|
{
|
|
/* Generate a 256 color dither palette */
|
|
SDL_Palette dithered;
|
|
SDL_Color colors[256];
|
|
|
|
dithered.ncolors = 256;
|
|
SDL_DitherColors(colors, 8);
|
|
dithered.colors = colors;
|
|
return Map1to1(&dithered, pal, identical);
|
|
}
|
|
|
|
void SDL_InvalidateAllBlitMap(SDL_Surface *surface)
|
|
{
|
|
SDL_ListNode *l = surface->internal->list_blitmap;
|
|
|
|
surface->internal->list_blitmap = NULL;
|
|
|
|
while (l) {
|
|
SDL_ListNode *tmp = l;
|
|
SDL_InvalidateMap((SDL_BlitMap *)l->entry);
|
|
l = l->next;
|
|
SDL_free(tmp);
|
|
}
|
|
}
|
|
|
|
void SDL_InvalidateMap(SDL_BlitMap *map)
|
|
{
|
|
if (!map) {
|
|
return;
|
|
}
|
|
if (map->dst) {
|
|
/* Un-register from the destination surface */
|
|
SDL_ListRemove(&map->dst->internal->list_blitmap, map);
|
|
}
|
|
map->dst = NULL;
|
|
map->src_palette_version = 0;
|
|
map->dst_palette_version = 0;
|
|
SDL_free(map->info.table);
|
|
map->info.table = NULL;
|
|
}
|
|
|
|
int 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->internal->map;
|
|
#if SDL_HAVE_RLE
|
|
if (src->internal->flags & SDL_INTERNAL_SURFACE_RLEACCEL) {
|
|
SDL_UnRLESurface(src, SDL_TRUE);
|
|
}
|
|
#endif
|
|
SDL_InvalidateMap(map);
|
|
|
|
/* Figure out what kind of mapping we're doing */
|
|
map->identity = 0;
|
|
srcfmt = src->internal->format;
|
|
srcpal = src->internal->palette;
|
|
dstfmt = dst->internal->format;
|
|
dstpal = dst->internal->palette;
|
|
if (SDL_ISPIXELFORMAT_INDEXED(srcfmt->format)) {
|
|
if (SDL_ISPIXELFORMAT_INDEXED(dstfmt->format)) {
|
|
/* Palette --> Palette */
|
|
map->info.table =
|
|
Map1to1(srcpal, dstpal, &map->identity);
|
|
if (!map->identity) {
|
|
if (!map->info.table) {
|
|
return -1;
|
|
}
|
|
}
|
|
if (srcfmt->bits_per_pixel != dstfmt->bits_per_pixel) {
|
|
map->identity = 0;
|
|
}
|
|
} else {
|
|
/* Palette --> BitField */
|
|
map->info.table =
|
|
Map1toN(srcpal, src->internal->map.info.r, src->internal->map.info.g,
|
|
src->internal->map.info.b, src->internal->map.info.a, dstfmt);
|
|
if (!map->info.table) {
|
|
return -1;
|
|
}
|
|
}
|
|
} else {
|
|
if (SDL_ISPIXELFORMAT_INDEXED(dstfmt->format)) {
|
|
/* BitField --> Palette */
|
|
map->info.table = MapNto1(srcfmt, dstpal, &map->identity);
|
|
if (!map->identity) {
|
|
if (!map->info.table) {
|
|
return -1;
|
|
}
|
|
}
|
|
map->identity = 0; /* Don't optimize to copy */
|
|
} else {
|
|
/* BitField --> BitField */
|
|
if (srcfmt == dstfmt) {
|
|
map->identity = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
map->dst = dst;
|
|
|
|
if (map->dst) {
|
|
/* Register BlitMap to the destination surface, to be invalidated when needed */
|
|
SDL_ListAdd(&map->dst->internal->list_blitmap, map);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|