SDL_pixels.h (17474B)
1/* 2 Simple DirectMedia Layer 3 Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org> 4 5 This software is provided 'as-is', without any express or implied 6 warranty. In no event will the authors be held liable for any damages 7 arising from the use of this software. 8 9 Permission is granted to anyone to use this software for any purpose, 10 including commercial applications, and to alter it and redistribute it 11 freely, subject to the following restrictions: 12 13 1. The origin of this software must not be misrepresented; you must not 14 claim that you wrote the original software. If you use this software 15 in a product, an acknowledgment in the product documentation would be 16 appreciated but is not required. 17 2. Altered source versions must be plainly marked as such, and must not be 18 misrepresented as being the original software. 19 3. This notice may not be removed or altered from any source distribution. 20*/ 21 22/** 23 * \file SDL_pixels.h 24 * 25 * Header for the enumerated pixel format definitions. 26 */ 27 28#ifndef SDL_pixels_h_ 29#define SDL_pixels_h_ 30 31#include "SDL_stdinc.h" 32#include "SDL_endian.h" 33 34#include "begin_code.h" 35/* Set up for C function definitions, even when using C++ */ 36#ifdef __cplusplus 37extern "C" { 38#endif 39 40/** 41 * \name Transparency definitions 42 * 43 * These define alpha as the opacity of a surface. 44 */ 45/* @{ */ 46#define SDL_ALPHA_OPAQUE 255 47#define SDL_ALPHA_TRANSPARENT 0 48/* @} */ 49 50/** Pixel type. */ 51typedef enum 52{ 53 SDL_PIXELTYPE_UNKNOWN, 54 SDL_PIXELTYPE_INDEX1, 55 SDL_PIXELTYPE_INDEX4, 56 SDL_PIXELTYPE_INDEX8, 57 SDL_PIXELTYPE_PACKED8, 58 SDL_PIXELTYPE_PACKED16, 59 SDL_PIXELTYPE_PACKED32, 60 SDL_PIXELTYPE_ARRAYU8, 61 SDL_PIXELTYPE_ARRAYU16, 62 SDL_PIXELTYPE_ARRAYU32, 63 SDL_PIXELTYPE_ARRAYF16, 64 SDL_PIXELTYPE_ARRAYF32 65} SDL_PixelType; 66 67/** Bitmap pixel order, high bit -> low bit. */ 68typedef enum 69{ 70 SDL_BITMAPORDER_NONE, 71 SDL_BITMAPORDER_4321, 72 SDL_BITMAPORDER_1234 73} SDL_BitmapOrder; 74 75/** Packed component order, high bit -> low bit. */ 76typedef enum 77{ 78 SDL_PACKEDORDER_NONE, 79 SDL_PACKEDORDER_XRGB, 80 SDL_PACKEDORDER_RGBX, 81 SDL_PACKEDORDER_ARGB, 82 SDL_PACKEDORDER_RGBA, 83 SDL_PACKEDORDER_XBGR, 84 SDL_PACKEDORDER_BGRX, 85 SDL_PACKEDORDER_ABGR, 86 SDL_PACKEDORDER_BGRA 87} SDL_PackedOrder; 88 89/** Array component order, low byte -> high byte. */ 90/* !!! FIXME: in 2.1, make these not overlap differently with 91 !!! FIXME: SDL_PACKEDORDER_*, so we can simplify SDL_ISPIXELFORMAT_ALPHA */ 92typedef enum 93{ 94 SDL_ARRAYORDER_NONE, 95 SDL_ARRAYORDER_RGB, 96 SDL_ARRAYORDER_RGBA, 97 SDL_ARRAYORDER_ARGB, 98 SDL_ARRAYORDER_BGR, 99 SDL_ARRAYORDER_BGRA, 100 SDL_ARRAYORDER_ABGR 101} SDL_ArrayOrder; 102 103/** Packed component layout. */ 104typedef enum 105{ 106 SDL_PACKEDLAYOUT_NONE, 107 SDL_PACKEDLAYOUT_332, 108 SDL_PACKEDLAYOUT_4444, 109 SDL_PACKEDLAYOUT_1555, 110 SDL_PACKEDLAYOUT_5551, 111 SDL_PACKEDLAYOUT_565, 112 SDL_PACKEDLAYOUT_8888, 113 SDL_PACKEDLAYOUT_2101010, 114 SDL_PACKEDLAYOUT_1010102 115} SDL_PackedLayout; 116 117#define SDL_DEFINE_PIXELFOURCC(A, B, C, D) SDL_FOURCC(A, B, C, D) 118 119#define SDL_DEFINE_PIXELFORMAT(type, order, layout, bits, bytes) \ 120 ((1 << 28) | ((type) << 24) | ((order) << 20) | ((layout) << 16) | \ 121 ((bits) << 8) | ((bytes) << 0)) 122 123#define SDL_PIXELFLAG(X) (((X) >> 28) & 0x0F) 124#define SDL_PIXELTYPE(X) (((X) >> 24) & 0x0F) 125#define SDL_PIXELORDER(X) (((X) >> 20) & 0x0F) 126#define SDL_PIXELLAYOUT(X) (((X) >> 16) & 0x0F) 127#define SDL_BITSPERPIXEL(X) (((X) >> 8) & 0xFF) 128#define SDL_BYTESPERPIXEL(X) \ 129 (SDL_ISPIXELFORMAT_FOURCC(X) ? \ 130 ((((X) == SDL_PIXELFORMAT_YUY2) || \ 131 ((X) == SDL_PIXELFORMAT_UYVY) || \ 132 ((X) == SDL_PIXELFORMAT_YVYU)) ? 2 : 1) : (((X) >> 0) & 0xFF)) 133 134#define SDL_ISPIXELFORMAT_INDEXED(format) \ 135 (!SDL_ISPIXELFORMAT_FOURCC(format) && \ 136 ((SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX1) || \ 137 (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX4) || \ 138 (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX8))) 139 140#define SDL_ISPIXELFORMAT_PACKED(format) \ 141 (!SDL_ISPIXELFORMAT_FOURCC(format) && \ 142 ((SDL_PIXELTYPE(format) == SDL_PIXELTYPE_PACKED8) || \ 143 (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_PACKED16) || \ 144 (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_PACKED32))) 145 146#define SDL_ISPIXELFORMAT_ARRAY(format) \ 147 (!SDL_ISPIXELFORMAT_FOURCC(format) && \ 148 ((SDL_PIXELTYPE(format) == SDL_PIXELTYPE_ARRAYU8) || \ 149 (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_ARRAYU16) || \ 150 (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_ARRAYU32) || \ 151 (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_ARRAYF16) || \ 152 (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_ARRAYF32))) 153 154#define SDL_ISPIXELFORMAT_ALPHA(format) \ 155 ((SDL_ISPIXELFORMAT_PACKED(format) && \ 156 ((SDL_PIXELORDER(format) == SDL_PACKEDORDER_ARGB) || \ 157 (SDL_PIXELORDER(format) == SDL_PACKEDORDER_RGBA) || \ 158 (SDL_PIXELORDER(format) == SDL_PACKEDORDER_ABGR) || \ 159 (SDL_PIXELORDER(format) == SDL_PACKEDORDER_BGRA))) || \ 160 (SDL_ISPIXELFORMAT_ARRAY(format) && \ 161 ((SDL_PIXELORDER(format) == SDL_ARRAYORDER_ARGB) || \ 162 (SDL_PIXELORDER(format) == SDL_ARRAYORDER_RGBA) || \ 163 (SDL_PIXELORDER(format) == SDL_ARRAYORDER_ABGR) || \ 164 (SDL_PIXELORDER(format) == SDL_ARRAYORDER_BGRA)))) 165 166/* The flag is set to 1 because 0x1? is not in the printable ASCII range */ 167#define SDL_ISPIXELFORMAT_FOURCC(format) \ 168 ((format) && (SDL_PIXELFLAG(format) != 1)) 169 170/* Note: If you modify this list, update SDL_GetPixelFormatName() */ 171typedef enum 172{ 173 SDL_PIXELFORMAT_UNKNOWN, 174 SDL_PIXELFORMAT_INDEX1LSB = 175 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX1, SDL_BITMAPORDER_4321, 0, 176 1, 0), 177 SDL_PIXELFORMAT_INDEX1MSB = 178 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX1, SDL_BITMAPORDER_1234, 0, 179 1, 0), 180 SDL_PIXELFORMAT_INDEX4LSB = 181 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX4, SDL_BITMAPORDER_4321, 0, 182 4, 0), 183 SDL_PIXELFORMAT_INDEX4MSB = 184 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX4, SDL_BITMAPORDER_1234, 0, 185 4, 0), 186 SDL_PIXELFORMAT_INDEX8 = 187 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX8, 0, 0, 8, 1), 188 SDL_PIXELFORMAT_RGB332 = 189 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED8, SDL_PACKEDORDER_XRGB, 190 SDL_PACKEDLAYOUT_332, 8, 1), 191 SDL_PIXELFORMAT_RGB444 = 192 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB, 193 SDL_PACKEDLAYOUT_4444, 12, 2), 194 SDL_PIXELFORMAT_BGR444 = 195 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XBGR, 196 SDL_PACKEDLAYOUT_4444, 12, 2), 197 SDL_PIXELFORMAT_RGB555 = 198 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB, 199 SDL_PACKEDLAYOUT_1555, 15, 2), 200 SDL_PIXELFORMAT_BGR555 = 201 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XBGR, 202 SDL_PACKEDLAYOUT_1555, 15, 2), 203 SDL_PIXELFORMAT_ARGB4444 = 204 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ARGB, 205 SDL_PACKEDLAYOUT_4444, 16, 2), 206 SDL_PIXELFORMAT_RGBA4444 = 207 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_RGBA, 208 SDL_PACKEDLAYOUT_4444, 16, 2), 209 SDL_PIXELFORMAT_ABGR4444 = 210 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ABGR, 211 SDL_PACKEDLAYOUT_4444, 16, 2), 212 SDL_PIXELFORMAT_BGRA4444 = 213 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_BGRA, 214 SDL_PACKEDLAYOUT_4444, 16, 2), 215 SDL_PIXELFORMAT_ARGB1555 = 216 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ARGB, 217 SDL_PACKEDLAYOUT_1555, 16, 2), 218 SDL_PIXELFORMAT_RGBA5551 = 219 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_RGBA, 220 SDL_PACKEDLAYOUT_5551, 16, 2), 221 SDL_PIXELFORMAT_ABGR1555 = 222 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ABGR, 223 SDL_PACKEDLAYOUT_1555, 16, 2), 224 SDL_PIXELFORMAT_BGRA5551 = 225 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_BGRA, 226 SDL_PACKEDLAYOUT_5551, 16, 2), 227 SDL_PIXELFORMAT_RGB565 = 228 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB, 229 SDL_PACKEDLAYOUT_565, 16, 2), 230 SDL_PIXELFORMAT_BGR565 = 231 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XBGR, 232 SDL_PACKEDLAYOUT_565, 16, 2), 233 SDL_PIXELFORMAT_RGB24 = 234 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_ARRAYU8, SDL_ARRAYORDER_RGB, 0, 235 24, 3), 236 SDL_PIXELFORMAT_BGR24 = 237 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_ARRAYU8, SDL_ARRAYORDER_BGR, 0, 238 24, 3), 239 SDL_PIXELFORMAT_RGB888 = 240 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_XRGB, 241 SDL_PACKEDLAYOUT_8888, 24, 4), 242 SDL_PIXELFORMAT_RGBX8888 = 243 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_RGBX, 244 SDL_PACKEDLAYOUT_8888, 24, 4), 245 SDL_PIXELFORMAT_BGR888 = 246 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_XBGR, 247 SDL_PACKEDLAYOUT_8888, 24, 4), 248 SDL_PIXELFORMAT_BGRX8888 = 249 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_BGRX, 250 SDL_PACKEDLAYOUT_8888, 24, 4), 251 SDL_PIXELFORMAT_ARGB8888 = 252 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ARGB, 253 SDL_PACKEDLAYOUT_8888, 32, 4), 254 SDL_PIXELFORMAT_RGBA8888 = 255 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_RGBA, 256 SDL_PACKEDLAYOUT_8888, 32, 4), 257 SDL_PIXELFORMAT_ABGR8888 = 258 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ABGR, 259 SDL_PACKEDLAYOUT_8888, 32, 4), 260 SDL_PIXELFORMAT_BGRA8888 = 261 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_BGRA, 262 SDL_PACKEDLAYOUT_8888, 32, 4), 263 SDL_PIXELFORMAT_ARGB2101010 = 264 SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ARGB, 265 SDL_PACKEDLAYOUT_2101010, 32, 4), 266 267 /* Aliases for RGBA byte arrays of color data, for the current platform */ 268#if SDL_BYTEORDER == SDL_BIG_ENDIAN 269 SDL_PIXELFORMAT_RGBA32 = SDL_PIXELFORMAT_RGBA8888, 270 SDL_PIXELFORMAT_ARGB32 = SDL_PIXELFORMAT_ARGB8888, 271 SDL_PIXELFORMAT_BGRA32 = SDL_PIXELFORMAT_BGRA8888, 272 SDL_PIXELFORMAT_ABGR32 = SDL_PIXELFORMAT_ABGR8888, 273#else 274 SDL_PIXELFORMAT_RGBA32 = SDL_PIXELFORMAT_ABGR8888, 275 SDL_PIXELFORMAT_ARGB32 = SDL_PIXELFORMAT_BGRA8888, 276 SDL_PIXELFORMAT_BGRA32 = SDL_PIXELFORMAT_ARGB8888, 277 SDL_PIXELFORMAT_ABGR32 = SDL_PIXELFORMAT_RGBA8888, 278#endif 279 280 SDL_PIXELFORMAT_YV12 = /**< Planar mode: Y + V + U (3 planes) */ 281 SDL_DEFINE_PIXELFOURCC('Y', 'V', '1', '2'), 282 SDL_PIXELFORMAT_IYUV = /**< Planar mode: Y + U + V (3 planes) */ 283 SDL_DEFINE_PIXELFOURCC('I', 'Y', 'U', 'V'), 284 SDL_PIXELFORMAT_YUY2 = /**< Packed mode: Y0+U0+Y1+V0 (1 plane) */ 285 SDL_DEFINE_PIXELFOURCC('Y', 'U', 'Y', '2'), 286 SDL_PIXELFORMAT_UYVY = /**< Packed mode: U0+Y0+V0+Y1 (1 plane) */ 287 SDL_DEFINE_PIXELFOURCC('U', 'Y', 'V', 'Y'), 288 SDL_PIXELFORMAT_YVYU = /**< Packed mode: Y0+V0+Y1+U0 (1 plane) */ 289 SDL_DEFINE_PIXELFOURCC('Y', 'V', 'Y', 'U'), 290 SDL_PIXELFORMAT_NV12 = /**< Planar mode: Y + U/V interleaved (2 planes) */ 291 SDL_DEFINE_PIXELFOURCC('N', 'V', '1', '2'), 292 SDL_PIXELFORMAT_NV21 = /**< Planar mode: Y + V/U interleaved (2 planes) */ 293 SDL_DEFINE_PIXELFOURCC('N', 'V', '2', '1'), 294 SDL_PIXELFORMAT_EXTERNAL_OES = /**< Android video texture format */ 295 SDL_DEFINE_PIXELFOURCC('O', 'E', 'S', ' ') 296} SDL_PixelFormatEnum; 297 298typedef struct SDL_Color 299{ 300 Uint8 r; 301 Uint8 g; 302 Uint8 b; 303 Uint8 a; 304} SDL_Color; 305#define SDL_Colour SDL_Color 306 307typedef struct SDL_Palette 308{ 309 int ncolors; 310 SDL_Color *colors; 311 Uint32 version; 312 int refcount; 313} SDL_Palette; 314 315/** 316 * \note Everything in the pixel format structure is read-only. 317 */ 318typedef struct SDL_PixelFormat 319{ 320 Uint32 format; 321 SDL_Palette *palette; 322 Uint8 BitsPerPixel; 323 Uint8 BytesPerPixel; 324 Uint8 padding[2]; 325 Uint32 Rmask; 326 Uint32 Gmask; 327 Uint32 Bmask; 328 Uint32 Amask; 329 Uint8 Rloss; 330 Uint8 Gloss; 331 Uint8 Bloss; 332 Uint8 Aloss; 333 Uint8 Rshift; 334 Uint8 Gshift; 335 Uint8 Bshift; 336 Uint8 Ashift; 337 int refcount; 338 struct SDL_PixelFormat *next; 339} SDL_PixelFormat; 340 341/** 342 * \brief Get the human readable name of a pixel format 343 */ 344extern DECLSPEC const char* SDLCALL SDL_GetPixelFormatName(Uint32 format); 345 346/** 347 * \brief Convert one of the enumerated pixel formats to a bpp and RGBA masks. 348 * 349 * \return SDL_TRUE, or SDL_FALSE if the conversion wasn't possible. 350 * 351 * \sa SDL_MasksToPixelFormatEnum() 352 */ 353extern DECLSPEC SDL_bool SDLCALL SDL_PixelFormatEnumToMasks(Uint32 format, 354 int *bpp, 355 Uint32 * Rmask, 356 Uint32 * Gmask, 357 Uint32 * Bmask, 358 Uint32 * Amask); 359 360/** 361 * \brief Convert a bpp and RGBA masks to an enumerated pixel format. 362 * 363 * \return The pixel format, or ::SDL_PIXELFORMAT_UNKNOWN if the conversion 364 * wasn't possible. 365 * 366 * \sa SDL_PixelFormatEnumToMasks() 367 */ 368extern DECLSPEC Uint32 SDLCALL SDL_MasksToPixelFormatEnum(int bpp, 369 Uint32 Rmask, 370 Uint32 Gmask, 371 Uint32 Bmask, 372 Uint32 Amask); 373 374/** 375 * \brief Create an SDL_PixelFormat structure from a pixel format enum. 376 */ 377extern DECLSPEC SDL_PixelFormat * SDLCALL SDL_AllocFormat(Uint32 pixel_format); 378 379/** 380 * \brief Free an SDL_PixelFormat structure. 381 */ 382extern DECLSPEC void SDLCALL SDL_FreeFormat(SDL_PixelFormat *format); 383 384/** 385 * \brief Create a palette structure with the specified number of color 386 * entries. 387 * 388 * \return A new palette, or NULL if there wasn't enough memory. 389 * 390 * \note The palette entries are initialized to white. 391 * 392 * \sa SDL_FreePalette() 393 */ 394extern DECLSPEC SDL_Palette *SDLCALL SDL_AllocPalette(int ncolors); 395 396/** 397 * \brief Set the palette for a pixel format structure. 398 */ 399extern DECLSPEC int SDLCALL SDL_SetPixelFormatPalette(SDL_PixelFormat * format, 400 SDL_Palette *palette); 401 402/** 403 * \brief Set a range of colors in a palette. 404 * 405 * \param palette The palette to modify. 406 * \param colors An array of colors to copy into the palette. 407 * \param firstcolor The index of the first palette entry to modify. 408 * \param ncolors The number of entries to modify. 409 * 410 * \return 0 on success, or -1 if not all of the colors could be set. 411 */ 412extern DECLSPEC int SDLCALL SDL_SetPaletteColors(SDL_Palette * palette, 413 const SDL_Color * colors, 414 int firstcolor, int ncolors); 415 416/** 417 * \brief Free a palette created with SDL_AllocPalette(). 418 * 419 * \sa SDL_AllocPalette() 420 */ 421extern DECLSPEC void SDLCALL SDL_FreePalette(SDL_Palette * palette); 422 423/** 424 * \brief Maps an RGB triple to an opaque pixel value for a given pixel format. 425 * 426 * \sa SDL_MapRGBA 427 */ 428extern DECLSPEC Uint32 SDLCALL SDL_MapRGB(const SDL_PixelFormat * format, 429 Uint8 r, Uint8 g, Uint8 b); 430 431/** 432 * \brief Maps an RGBA quadruple to a pixel value for a given pixel format. 433 * 434 * \sa SDL_MapRGB 435 */ 436extern DECLSPEC Uint32 SDLCALL SDL_MapRGBA(const SDL_PixelFormat * format, 437 Uint8 r, Uint8 g, Uint8 b, 438 Uint8 a); 439 440/** 441 * \brief Get the RGB components from a pixel of the specified format. 442 * 443 * \sa SDL_GetRGBA 444 */ 445extern DECLSPEC void SDLCALL SDL_GetRGB(Uint32 pixel, 446 const SDL_PixelFormat * format, 447 Uint8 * r, Uint8 * g, Uint8 * b); 448 449/** 450 * \brief Get the RGBA components from a pixel of the specified format. 451 * 452 * \sa SDL_GetRGB 453 */ 454extern DECLSPEC void SDLCALL SDL_GetRGBA(Uint32 pixel, 455 const SDL_PixelFormat * format, 456 Uint8 * r, Uint8 * g, Uint8 * b, 457 Uint8 * a); 458 459/** 460 * \brief Calculate a 256 entry gamma ramp for a gamma value. 461 */ 462extern DECLSPEC void SDLCALL SDL_CalculateGammaRamp(float gamma, Uint16 * ramp); 463 464 465/* Ends C function definitions when using C++ */ 466#ifdef __cplusplus 467} 468#endif 469#include "close_code.h" 470 471#endif /* SDL_pixels_h_ */ 472 473/* vi: set ts=4 sw=4 expandtab: */