This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_pixels.h
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2010 Sam Lantinga
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This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
/**
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* \file SDL_pixels.h
*
* Header for the enumerated pixel format definitions.
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*/
#ifndef _SDL_pixels_h
#define _SDL_pixels_h
#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
/* *INDENT-OFF* */
extern "C" {
/* *INDENT-ON* */
#endif
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/**
* \name Transparency definitions
*
* These define alpha as the opacity of a surface.
*/
/*@{*/
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#define SDL_ALPHA_OPAQUE 255
#define SDL_ALPHA_TRANSPARENT 0
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/*@}*/
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/** Pixel type. */
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SDL_PIXELTYPE_UNKNOWN,
SDL_PIXELTYPE_INDEX1,
SDL_PIXELTYPE_INDEX4,
SDL_PIXELTYPE_INDEX8,
SDL_PIXELTYPE_PACKED8,
SDL_PIXELTYPE_PACKED16,
SDL_PIXELTYPE_PACKED32,
SDL_PIXELTYPE_ARRAYU8,
SDL_PIXELTYPE_ARRAYU16,
SDL_PIXELTYPE_ARRAYU32,
SDL_PIXELTYPE_ARRAYF16,
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SDL_PIXELTYPE_ARRAYF32
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/** Bitmap pixel order, high bit -> low bit. */
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SDL_BITMAPORDER_NONE,
SDL_BITMAPORDER_4321,
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SDL_BITMAPORDER_1234
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/** Packed component order, high bit -> low bit. */
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SDL_PACKEDORDER_NONE,
SDL_PACKEDORDER_XRGB,
SDL_PACKEDORDER_RGBX,
SDL_PACKEDORDER_ARGB,
SDL_PACKEDORDER_RGBA,
SDL_PACKEDORDER_XBGR,
SDL_PACKEDORDER_BGRX,
SDL_PACKEDORDER_ABGR,
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SDL_PACKEDORDER_BGRA
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/** Array component order, low byte -> high byte. */
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SDL_ARRAYORDER_NONE,
SDL_ARRAYORDER_RGB,
SDL_ARRAYORDER_RGBA,
SDL_ARRAYORDER_ARGB,
SDL_ARRAYORDER_BGR,
SDL_ARRAYORDER_BGRA,
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SDL_ARRAYORDER_ABGR
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/** Packed component layout. */
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SDL_PACKEDLAYOUT_NONE,
SDL_PACKEDLAYOUT_332,
SDL_PACKEDLAYOUT_4444,
SDL_PACKEDLAYOUT_1555,
SDL_PACKEDLAYOUT_5551,
SDL_PACKEDLAYOUT_565,
SDL_PACKEDLAYOUT_8888,
SDL_PACKEDLAYOUT_2101010,
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SDL_PACKEDLAYOUT_1010102
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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) \
((1 << 31) | ((type) << 24) | ((order) << 20) | ((layout) << 16) | \
((bits) << 8) | ((bytes) << 0))
#define SDL_PIXELTYPE(X) (((X) >> 24) & 0x0F)
#define SDL_PIXELORDER(X) (((X) >> 20) & 0x0F)
#define SDL_PIXELLAYOUT(X) (((X) >> 16) & 0x0F)
#define SDL_BITSPERPIXEL(X) (((X) >> 8) & 0xFF)
#define SDL_BYTESPERPIXEL(X) (((X) >> 0) & 0xFF)
#define SDL_ISPIXELFORMAT_INDEXED(format) \
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((SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX1) || \
(SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX4) || \
(SDL_PIXELTYPE(format) == SDL_PIXELTYPE_INDEX8))
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#define SDL_ISPIXELFORMAT_ALPHA(format) \
((SDL_PIXELORDER(format) == SDL_PACKEDORDER_ARGB) || \
(SDL_PIXELORDER(format) == SDL_PACKEDORDER_RGBA) || \
(SDL_PIXELORDER(format) == SDL_PACKEDORDER_ABGR) || \
(SDL_PIXELORDER(format) == SDL_PACKEDORDER_BGRA))
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#define SDL_ISPIXELFORMAT_FOURCC(format) \
((format) && !((format) & 0x80000000))
enum
{
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SDL_PIXELFORMAT_UNKNOWN,
SDL_PIXELFORMAT_INDEX1LSB =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX1, SDL_BITMAPORDER_1234, 0,
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SDL_PIXELFORMAT_INDEX1MSB =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX1, SDL_BITMAPORDER_4321, 0,
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SDL_PIXELFORMAT_INDEX4LSB =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX4, SDL_BITMAPORDER_1234, 0,
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SDL_PIXELFORMAT_INDEX4MSB =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX4, SDL_BITMAPORDER_4321, 0,
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SDL_PIXELFORMAT_INDEX8 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_INDEX8, 0, 0, 8, 1),
SDL_PIXELFORMAT_RGB332 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED8, SDL_PACKEDORDER_XRGB,
SDL_PACKEDLAYOUT_332, 8, 1),
SDL_PIXELFORMAT_RGB444 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB,
SDL_PACKEDLAYOUT_4444, 12, 2),
SDL_PIXELFORMAT_RGB555 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB,
SDL_PACKEDLAYOUT_1555, 15, 2),
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SDL_PIXELFORMAT_BGR555 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XBGR,
SDL_PACKEDLAYOUT_1555, 15, 2),
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SDL_PIXELFORMAT_ARGB4444 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ARGB,
SDL_PACKEDLAYOUT_4444, 16, 2),
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SDL_PIXELFORMAT_ABGR4444 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ABGR,
SDL_PACKEDLAYOUT_4444, 16, 2),
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SDL_PIXELFORMAT_ARGB1555 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ARGB,
SDL_PACKEDLAYOUT_1555, 16, 2),
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SDL_PIXELFORMAT_ABGR1555 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_ABGR,
SDL_PACKEDLAYOUT_1555, 16, 2),
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SDL_PIXELFORMAT_RGB565 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XRGB,
SDL_PACKEDLAYOUT_565, 16, 2),
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SDL_PIXELFORMAT_BGR565 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED16, SDL_PACKEDORDER_XBGR,
SDL_PACKEDLAYOUT_565, 16, 2),
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SDL_PIXELFORMAT_RGB24 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_ARRAYU8, SDL_ARRAYORDER_RGB, 0,
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SDL_PIXELFORMAT_BGR24 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_ARRAYU8, SDL_ARRAYORDER_BGR, 0,
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SDL_PIXELFORMAT_RGB888 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_XRGB,
SDL_PACKEDLAYOUT_8888, 24, 4),
SDL_PIXELFORMAT_BGR888 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_XBGR,
SDL_PACKEDLAYOUT_8888, 24, 4),
SDL_PIXELFORMAT_ARGB8888 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ARGB,
SDL_PACKEDLAYOUT_8888, 32, 4),
SDL_PIXELFORMAT_RGBA8888 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_RGBA,
SDL_PACKEDLAYOUT_8888, 32, 4),
SDL_PIXELFORMAT_ABGR8888 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ABGR,
SDL_PACKEDLAYOUT_8888, 32, 4),
SDL_PIXELFORMAT_BGRA8888 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_BGRA,
SDL_PACKEDLAYOUT_8888, 32, 4),
SDL_PIXELFORMAT_ARGB2101010 =
SDL_DEFINE_PIXELFORMAT(SDL_PIXELTYPE_PACKED32, SDL_PACKEDORDER_ARGB,
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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};
typedef struct SDL_Color
{
Uint8 r;
Uint8 g;
Uint8 b;
Uint8 unused;
} SDL_Color;
#define SDL_Colour SDL_Color
typedef struct SDL_Palette SDL_Palette;
typedef int (*SDL_PaletteChangedFunc) (void *userdata, SDL_Palette * palette);
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typedef struct SDL_PaletteWatch SDL_PaletteWatch;
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struct SDL_Palette
{
int ncolors;
SDL_Color *colors;
int refcount;
SDL_PaletteWatch *watch;
};
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/**
* \note Everything in the pixel format structure is read-only.
*/
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typedef struct SDL_PixelFormat
{
SDL_Palette *palette;
Uint8 BitsPerPixel;
Uint8 BytesPerPixel;
Uint8 Rloss;
Uint8 Gloss;
Uint8 Bloss;
Uint8 Aloss;
Uint8 Rshift;
Uint8 Gshift;
Uint8 Bshift;
Uint8 Ashift;
Uint32 Rmask;
Uint32 Gmask;
Uint32 Bmask;
Uint32 Amask;
} SDL_PixelFormat;
/**
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* \brief Convert one of the enumerated pixel formats to a bpp and RGBA masks.
*
* \return SDL_TRUE, or SDL_FALSE if the conversion wasn't possible.
*
* \sa SDL_MasksToPixelFormatEnum()
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*/
extern DECLSPEC SDL_bool SDLCALL SDL_PixelFormatEnumToMasks(Uint32 format,
int *bpp,
Uint32 * Rmask,
Uint32 * Gmask,
Uint32 * Bmask,
Uint32 * Amask);
/**
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* \brief Convert a bpp and RGBA masks to an enumerated pixel format.
*
* \return The pixel format, or ::SDL_PIXELFORMAT_UNKNOWN if the conversion
* wasn't possible.
*
* \sa SDL_PixelFormatEnumToMasks()
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*/
extern DECLSPEC Uint32 SDLCALL SDL_MasksToPixelFormatEnum(int bpp,
Uint32 Rmask,
Uint32 Gmask,
Uint32 Bmask,
Uint32 Amask);
/**
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* \brief Create a palette structure with the specified number of color
* entries.
*
* \return A new palette, or NULL if there wasn't enough memory.
*
* \note The palette entries are initialized to white.
*
* \sa SDL_FreePalette()
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*/
extern DECLSPEC SDL_Palette *SDLCALL SDL_AllocPalette(int ncolors);
/**
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* \brief Add a callback function which is called when the palette changes.
*
* \sa SDL_DelPaletteWatch()
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*/
extern DECLSPEC int SDLCALL SDL_AddPaletteWatch(SDL_Palette * palette,
SDL_PaletteChangedFunc
callback, void *userdata);
/**
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* \brief Remove a callback function previously added with
* SDL_AddPaletteWatch().
*
* \sa SDL_AddPaletteWatch()
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*/
extern DECLSPEC void SDLCALL SDL_DelPaletteWatch(SDL_Palette * palette,
SDL_PaletteChangedFunc
callback, void *userdata);
/**
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* \brief Set a range of colors in a palette.
*
* \param palette The palette to modify.
* \param colors An array of colors to copy into the palette.
* \param firstcolor The index of the first palette entry to modify.
* \param ncolors The number of entries to modify.
*
* \return 0 on success, or -1 if not all of the colors could be set.
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*/
extern DECLSPEC int SDLCALL SDL_SetPaletteColors(SDL_Palette * palette,
const SDL_Color * colors,
int firstcolor, int ncolors);
/**
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* \brief Free a palette created with SDL_AllocPalette().
*
* \sa SDL_AllocPalette()
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*/
extern DECLSPEC void SDLCALL SDL_FreePalette(SDL_Palette * palette);
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* \brief Maps an RGB triple to an opaque pixel value for a given pixel format.
*
* \sa SDL_MapRGBA
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*/
extern DECLSPEC Uint32 SDLCALL SDL_MapRGB(const SDL_PixelFormat * format,
Uint8 r, Uint8 g, Uint8 b);
/**
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* \brief Maps an RGBA quadruple to a pixel value for a given pixel format.
*
* \sa SDL_MapRGB
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*/
extern DECLSPEC Uint32 SDLCALL SDL_MapRGBA(const SDL_PixelFormat * format,
Uint8 r, Uint8 g, Uint8 b,
Uint8 a);
/**
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* \brief Get the RGB components from a pixel of the specified format.
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*
* \sa SDL_GetRGBA
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*/
extern DECLSPEC void SDLCALL SDL_GetRGB(Uint32 pixel,
const SDL_PixelFormat * format,
Uint8 * r, Uint8 * g, Uint8 * b);
/**
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* \brief Get the RGBA components from a pixel of the specified format.
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*
* \sa SDL_GetRGB
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*/
extern DECLSPEC void SDLCALL SDL_GetRGBA(Uint32 pixel,
const SDL_PixelFormat * format,
Uint8 * r, Uint8 * g, Uint8 * b,
Uint8 * a);
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/* Ends C function definitions when using C++ */
#ifdef __cplusplus
/* *INDENT-OFF* */
}
/* *INDENT-ON* */
#endif
#include "close_code.h"
#endif /* _SDL_pixels_h */
/* vi: set ts=4 sw=4 expandtab: */