424 строки
14 KiB
C
424 строки
14 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2011 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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/**
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* \file SDL_pixels.h
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*
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* Header for the enumerated pixel format definitions.
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*/
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#ifndef _SDL_pixels_h
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#define _SDL_pixels_h
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#include "begin_code.h"
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/* Set up for C function definitions, even when using C++ */
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#ifdef __cplusplus
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/* *INDENT-OFF* */
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extern "C" {
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/* *INDENT-ON* */
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#endif
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/**
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* \name Transparency definitions
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*
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* These define alpha as the opacity of a surface.
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*/
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/*@{*/
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#define SDL_ALPHA_OPAQUE 255
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#define SDL_ALPHA_TRANSPARENT 0
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/*@}*/
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/** Pixel type. */
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enum
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{
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SDL_PIXELTYPE_UNKNOWN,
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SDL_PIXELTYPE_INDEX1,
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SDL_PIXELTYPE_INDEX4,
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SDL_PIXELTYPE_INDEX8,
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SDL_PIXELTYPE_PACKED8,
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SDL_PIXELTYPE_PACKED16,
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SDL_PIXELTYPE_PACKED32,
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SDL_PIXELTYPE_ARRAYU8,
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SDL_PIXELTYPE_ARRAYU16,
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SDL_PIXELTYPE_ARRAYU32,
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SDL_PIXELTYPE_ARRAYF16,
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SDL_PIXELTYPE_ARRAYF32
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};
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/** Bitmap pixel order, high bit -> low bit. */
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enum
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{
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SDL_BITMAPORDER_NONE,
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SDL_BITMAPORDER_4321,
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SDL_BITMAPORDER_1234
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};
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/** Packed component order, high bit -> low bit. */
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enum
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{
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SDL_PACKEDORDER_NONE,
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SDL_PACKEDORDER_XRGB,
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SDL_PACKEDORDER_RGBX,
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SDL_PACKEDORDER_ARGB,
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SDL_PACKEDORDER_RGBA,
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SDL_PACKEDORDER_XBGR,
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SDL_PACKEDORDER_BGRX,
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SDL_PACKEDORDER_ABGR,
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SDL_PACKEDORDER_BGRA
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};
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/** Array component order, low byte -> high byte. */
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enum
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{
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SDL_ARRAYORDER_NONE,
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SDL_ARRAYORDER_RGB,
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SDL_ARRAYORDER_RGBA,
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SDL_ARRAYORDER_ARGB,
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SDL_ARRAYORDER_BGR,
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SDL_ARRAYORDER_BGRA,
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SDL_ARRAYORDER_ABGR
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};
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/** Packed component layout. */
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enum
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{
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SDL_PACKEDLAYOUT_NONE,
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SDL_PACKEDLAYOUT_332,
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SDL_PACKEDLAYOUT_4444,
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SDL_PACKEDLAYOUT_1555,
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SDL_PACKEDLAYOUT_5551,
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SDL_PACKEDLAYOUT_565,
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SDL_PACKEDLAYOUT_8888,
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SDL_PACKEDLAYOUT_2101010,
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SDL_PACKEDLAYOUT_1010102
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};
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#define SDL_DEFINE_PIXELFOURCC(A, B, C, D) SDL_FOURCC(A, B, C, D)
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#define SDL_DEFINE_PIXELFORMAT(type, order, layout, bits, bytes) \
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((1 << 31) | ((type) << 24) | ((order) << 20) | ((layout) << 16) | \
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((bits) << 8) | ((bytes) << 0))
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#define SDL_PIXELTYPE(X) (((X) >> 24) & 0x0F)
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#define SDL_PIXELORDER(X) (((X) >> 20) & 0x0F)
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#define SDL_PIXELLAYOUT(X) (((X) >> 16) & 0x0F)
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#define SDL_BITSPERPIXEL(X) (((X) >> 8) & 0xFF)
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#define SDL_BYTESPERPIXEL(X) \
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(SDL_ISPIXELFORMAT_FOURCC(X) ? \
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((((X) == SDL_PIXELFORMAT_YUY2) || \
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((X) == SDL_PIXELFORMAT_UYVY) || \
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((X) == SDL_PIXELFORMAT_YVYU)) ? 2 : 1) : (((X) >> 0) & 0xFF))
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#define SDL_ISPIXELFORMAT_INDEXED(format) \
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(!SDL_ISPIXELFORMAT_FOURCC(format) && \
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((SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX1) || \
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(SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX4) || \
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(SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX8)))
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#define SDL_ISPIXELFORMAT_ALPHA(format) \
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(!SDL_ISPIXELFORMAT_FOURCC(format) && \
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((SDL_PIXELORDER(format) == SDL_PACKEDORDER_ARGB) || \
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(SDL_PIXELORDER(format) == SDL_PACKEDORDER_RGBA) || \
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(SDL_PIXELORDER(format) == SDL_PACKEDORDER_ABGR) || \
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(SDL_PIXELORDER(format) == SDL_PACKEDORDER_BGRA)))
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#define SDL_ISPIXELFORMAT_FOURCC(format) \
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((format) && !((format) & 0x80000000))
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/* Note: If you modify this list, update SDL_GetPixelFormatName() */
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enum
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{
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SDL_PIXELFORMAT_UNKNOWN,
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SDL_PIXELFORMAT_INDEX1LSB =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX1, SDL_BITMAPORDER_4321, 0,
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1, 0),
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SDL_PIXELFORMAT_INDEX1MSB =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX1, SDL_BITMAPORDER_1234, 0,
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1, 0),
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SDL_PIXELFORMAT_INDEX4LSB =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX4, SDL_BITMAPORDER_4321, 0,
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4, 0),
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SDL_PIXELFORMAT_INDEX4MSB =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX4, SDL_BITMAPORDER_1234, 0,
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4, 0),
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SDL_PIXELFORMAT_INDEX8 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX8, 0, 0, 8, 1),
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SDL_PIXELFORMAT_RGB332 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED8, SDL_PACKEDORDER_XRGB,
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SDL_PACKEDLAYOUT_332, 8, 1),
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SDL_PIXELFORMAT_RGB444 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB,
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SDL_PACKEDLAYOUT_4444, 12, 2),
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SDL_PIXELFORMAT_RGB555 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB,
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SDL_PACKEDLAYOUT_1555, 15, 2),
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SDL_PIXELFORMAT_BGR555 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XBGR,
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SDL_PACKEDLAYOUT_1555, 15, 2),
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SDL_PIXELFORMAT_ARGB4444 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ARGB,
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SDL_PACKEDLAYOUT_4444, 16, 2),
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SDL_PIXELFORMAT_RGBA4444 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_RGBA,
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SDL_PACKEDLAYOUT_4444, 16, 2),
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SDL_PIXELFORMAT_ABGR4444 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ABGR,
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SDL_PACKEDLAYOUT_4444, 16, 2),
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SDL_PIXELFORMAT_BGRA4444 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_BGRA,
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SDL_PACKEDLAYOUT_4444, 16, 2),
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SDL_PIXELFORMAT_ARGB1555 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ARGB,
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SDL_PACKEDLAYOUT_1555, 16, 2),
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SDL_PIXELFORMAT_RGBA5551 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_RGBA,
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SDL_PACKEDLAYOUT_5551, 16, 2),
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SDL_PIXELFORMAT_ABGR1555 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ABGR,
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SDL_PACKEDLAYOUT_1555, 16, 2),
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SDL_PIXELFORMAT_BGRA5551 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_BGRA,
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SDL_PACKEDLAYOUT_5551, 16, 2),
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SDL_PIXELFORMAT_RGB565 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB,
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SDL_PACKEDLAYOUT_565, 16, 2),
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SDL_PIXELFORMAT_BGR565 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XBGR,
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SDL_PACKEDLAYOUT_565, 16, 2),
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SDL_PIXELFORMAT_RGB24 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_ARRAYU8, SDL_ARRAYORDER_RGB, 0,
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24, 3),
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SDL_PIXELFORMAT_BGR24 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_ARRAYU8, SDL_ARRAYORDER_BGR, 0,
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24, 3),
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SDL_PIXELFORMAT_RGB888 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_XRGB,
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SDL_PACKEDLAYOUT_8888, 24, 4),
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SDL_PIXELFORMAT_BGR888 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_XBGR,
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SDL_PACKEDLAYOUT_8888, 24, 4),
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SDL_PIXELFORMAT_ARGB8888 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ARGB,
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SDL_PACKEDLAYOUT_8888, 32, 4),
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SDL_PIXELFORMAT_RGBA8888 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_RGBA,
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SDL_PACKEDLAYOUT_8888, 32, 4),
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SDL_PIXELFORMAT_ABGR8888 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ABGR,
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SDL_PACKEDLAYOUT_8888, 32, 4),
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SDL_PIXELFORMAT_BGRA8888 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_BGRA,
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SDL_PACKEDLAYOUT_8888, 32, 4),
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SDL_PIXELFORMAT_ARGB2101010 =
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SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ARGB,
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SDL_PACKEDLAYOUT_2101010, 32, 4),
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SDL_PIXELFORMAT_YV12 = /**< Planar mode: Y + V + U (3 planes) */
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SDL_DEFINE_PIXELFOURCC('Y', 'V', '1', '2'),
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SDL_PIXELFORMAT_IYUV = /**< Planar mode: Y + U + V (3 planes) */
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SDL_DEFINE_PIXELFOURCC('I', 'Y', 'U', 'V'),
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SDL_PIXELFORMAT_YUY2 = /**< Packed mode: Y0+U0+Y1+V0 (1 plane) */
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SDL_DEFINE_PIXELFOURCC('Y', 'U', 'Y', '2'),
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SDL_PIXELFORMAT_UYVY = /**< Packed mode: U0+Y0+V0+Y1 (1 plane) */
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SDL_DEFINE_PIXELFOURCC('U', 'Y', 'V', 'Y'),
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SDL_PIXELFORMAT_YVYU = /**< Packed mode: Y0+V0+Y1+U0 (1 plane) */
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SDL_DEFINE_PIXELFOURCC('Y', 'V', 'Y', 'U')
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};
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typedef struct SDL_Color
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{
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Uint8 r;
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Uint8 g;
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Uint8 b;
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Uint8 unused;
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} SDL_Color;
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#define SDL_Colour SDL_Color
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typedef struct SDL_Palette
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{
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int ncolors;
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SDL_Color *colors;
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Uint32 version;
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int refcount;
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} SDL_Palette;
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/**
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* \note Everything in the pixel format structure is read-only.
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*/
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typedef struct SDL_PixelFormat
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{
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Uint32 format;
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SDL_Palette *palette;
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Uint8 BitsPerPixel;
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Uint8 BytesPerPixel;
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Uint8 padding[2];
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Uint32 Rmask;
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Uint32 Gmask;
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Uint32 Bmask;
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Uint32 Amask;
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Uint8 Rloss;
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Uint8 Gloss;
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Uint8 Bloss;
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Uint8 Aloss;
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Uint8 Rshift;
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Uint8 Gshift;
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Uint8 Bshift;
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Uint8 Ashift;
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int refcount;
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struct SDL_PixelFormat *next;
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} SDL_PixelFormat;
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/**
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* \brief Get the human readable name of a pixel format
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*/
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extern DECLSPEC const char* SDLCALL SDL_GetPixelFormatName(Uint32 format);
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/**
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* \brief Convert one of the enumerated pixel formats to a bpp and RGBA masks.
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*
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* \return SDL_TRUE, or SDL_FALSE if the conversion wasn't possible.
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*
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* \sa SDL_MasksToPixelFormatEnum()
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*/
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extern DECLSPEC SDL_bool SDLCALL SDL_PixelFormatEnumToMasks(Uint32 format,
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int *bpp,
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Uint32 * Rmask,
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Uint32 * Gmask,
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Uint32 * Bmask,
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Uint32 * Amask);
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/**
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* \brief Convert a bpp and RGBA masks to an enumerated pixel format.
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*
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* \return The pixel format, or ::SDL_PIXELFORMAT_UNKNOWN if the conversion
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* wasn't possible.
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*
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* \sa SDL_PixelFormatEnumToMasks()
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*/
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extern DECLSPEC Uint32 SDLCALL SDL_MasksToPixelFormatEnum(int bpp,
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Uint32 Rmask,
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Uint32 Gmask,
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Uint32 Bmask,
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Uint32 Amask);
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/**
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* \brief Create an SDL_PixelFormat structure from a pixel format enum.
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*/
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extern DECLSPEC SDL_PixelFormat * SDLCALL SDL_AllocFormat(Uint32 pixel_format);
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/**
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* \brief Free an SDL_PixelFormat structure.
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*/
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extern DECLSPEC void SDLCALL SDL_FreeFormat(SDL_PixelFormat *format);
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/**
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* \brief Create a palette structure with the specified number of color
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* entries.
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*
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* \return A new palette, or NULL if there wasn't enough memory.
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*
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* \note The palette entries are initialized to white.
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*
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* \sa SDL_FreePalette()
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*/
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extern DECLSPEC SDL_Palette *SDLCALL SDL_AllocPalette(int ncolors);
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/**
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* \brief Set the palette for a pixel format structure.
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*/
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extern DECLSPEC int SDLCALL SDL_SetPixelFormatPalette(SDL_PixelFormat * format,
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SDL_Palette *palette);
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/**
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* \brief Set a range of colors in a palette.
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*
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* \param palette The palette to modify.
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* \param colors An array of colors to copy into the palette.
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* \param firstcolor The index of the first palette entry to modify.
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* \param ncolors The number of entries to modify.
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*
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* \return 0 on success, or -1 if not all of the colors could be set.
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*/
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extern DECLSPEC int SDLCALL SDL_SetPaletteColors(SDL_Palette * palette,
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const SDL_Color * colors,
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int firstcolor, int ncolors);
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/**
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* \brief Free a palette created with SDL_AllocPalette().
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*
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* \sa SDL_AllocPalette()
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*/
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extern DECLSPEC void SDLCALL SDL_FreePalette(SDL_Palette * palette);
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/**
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* \brief Maps an RGB triple to an opaque pixel value for a given pixel format.
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*
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* \sa SDL_MapRGBA
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*/
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extern DECLSPEC Uint32 SDLCALL SDL_MapRGB(const SDL_PixelFormat * format,
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Uint8 r, Uint8 g, Uint8 b);
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/**
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* \brief Maps an RGBA quadruple to a pixel value for a given pixel format.
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*
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* \sa SDL_MapRGB
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*/
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extern DECLSPEC Uint32 SDLCALL SDL_MapRGBA(const SDL_PixelFormat * format,
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Uint8 r, Uint8 g, Uint8 b,
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Uint8 a);
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/**
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* \brief Get the RGB components from a pixel of the specified format.
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*
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* \sa SDL_GetRGBA
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*/
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extern DECLSPEC void SDLCALL SDL_GetRGB(Uint32 pixel,
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const SDL_PixelFormat * format,
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Uint8 * r, Uint8 * g, Uint8 * b);
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/**
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* \brief Get the RGBA components from a pixel of the specified format.
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*
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* \sa SDL_GetRGB
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*/
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extern DECLSPEC void SDLCALL SDL_GetRGBA(Uint32 pixel,
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const SDL_PixelFormat * format,
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Uint8 * r, Uint8 * g, Uint8 * b,
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Uint8 * a);
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/**
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* \brief Calculate a 256 entry gamma ramp for a gamma value.
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*/
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extern DECLSPEC void SDLCALL SDL_CalculateGammaRamp(float gamma, Uint16 * ramp);
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/* Ends C function definitions when using C++ */
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#ifdef __cplusplus
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/* *INDENT-OFF* */
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}
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/* *INDENT-ON* */
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#endif
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#include "close_code.h"
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#endif /* _SDL_pixels_h */
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/* vi: set ts=4 sw=4 expandtab: */
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