mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2025-04-10 19:15:14 +00:00
121 lines
5 KiB
C
121 lines
5 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely, subject to the following restrictions:
|
|
|
|
1. The origin of this software must not be misrepresented; you must not
|
|
claim that you wrote the original software. If you use this software
|
|
in a product, an acknowledgment in the product documentation would be
|
|
appreciated but is not required.
|
|
2. Altered source versions must be plainly marked as such, and must not be
|
|
misrepresented as being the original software.
|
|
3. This notice may not be removed or altered from any source distribution.
|
|
*/
|
|
|
|
/**
|
|
* \file SDL_blendmode.h
|
|
*
|
|
* Header file declaring the SDL_BlendMode enumeration
|
|
*/
|
|
|
|
#ifndef SDL_blendmode_h_
|
|
#define SDL_blendmode_h_
|
|
|
|
#include "begin_code.h"
|
|
/* Set up for C function definitions, even when using C++ */
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* \brief The blend mode used in SDL_RenderCopy() and drawing operations.
|
|
*/
|
|
typedef enum
|
|
{
|
|
SDL_BLENDMODE_NONE = 0x00000000, /**< no blending
|
|
dstRGBA = srcRGBA */
|
|
SDL_BLENDMODE_BLEND = 0x00000001, /**< alpha blending
|
|
dstRGB = (srcRGB * srcA) + (dstRGB * (1-srcA))
|
|
dstA = srcA + (dstA * (1-srcA)) */
|
|
SDL_BLENDMODE_ADD = 0x00000002, /**< additive blending
|
|
dstRGB = (srcRGB * srcA) + dstRGB
|
|
dstA = dstA */
|
|
SDL_BLENDMODE_MOD = 0x00000004, /**< color modulate
|
|
dstRGB = srcRGB * dstRGB
|
|
dstA = dstA */
|
|
SDL_BLENDMODE_INVALID = 0x7FFFFFFF
|
|
|
|
/* Additional custom blend modes can be returned by SDL_ComposeCustomBlendMode() */
|
|
|
|
} SDL_BlendMode;
|
|
|
|
/**
|
|
* \brief The blend operation used when combining source and destination pixel components
|
|
*/
|
|
typedef enum
|
|
{
|
|
SDL_BLENDOPERATION_ADD = 0x1, /**< dst + src: supported by all renderers */
|
|
SDL_BLENDOPERATION_SUBTRACT = 0x2, /**< dst - src : supported by D3D9, D3D11, OpenGL, OpenGLES */
|
|
SDL_BLENDOPERATION_REV_SUBTRACT = 0x3, /**< src - dst : supported by D3D9, D3D11, OpenGL, OpenGLES */
|
|
SDL_BLENDOPERATION_MINIMUM = 0x4, /**< min(dst, src) : supported by D3D11 */
|
|
SDL_BLENDOPERATION_MAXIMUM = 0x5 /**< max(dst, src) : supported by D3D11 */
|
|
|
|
} SDL_BlendOperation;
|
|
|
|
/**
|
|
* \brief The normalized factor used to multiply pixel components
|
|
*/
|
|
typedef enum
|
|
{
|
|
SDL_BLENDFACTOR_ZERO = 0x1, /**< 0, 0, 0, 0 */
|
|
SDL_BLENDFACTOR_ONE = 0x2, /**< 1, 1, 1, 1 */
|
|
SDL_BLENDFACTOR_SRC_COLOR = 0x3, /**< srcR, srcG, srcB, srcA */
|
|
SDL_BLENDFACTOR_ONE_MINUS_SRC_COLOR = 0x4, /**< 1-srcR, 1-srcG, 1-srcB, 1-srcA */
|
|
SDL_BLENDFACTOR_SRC_ALPHA = 0x5, /**< srcA, srcA, srcA, srcA */
|
|
SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA = 0x6, /**< 1-srcA, 1-srcA, 1-srcA, 1-srcA */
|
|
SDL_BLENDFACTOR_DST_COLOR = 0x7, /**< dstR, dstG, dstB, dstA */
|
|
SDL_BLENDFACTOR_ONE_MINUS_DST_COLOR = 0x8, /**< 1-dstR, 1-dstG, 1-dstB, 1-dstA */
|
|
SDL_BLENDFACTOR_DST_ALPHA = 0x9, /**< dstA, dstA, dstA, dstA */
|
|
SDL_BLENDFACTOR_ONE_MINUS_DST_ALPHA = 0xA /**< 1-dstA, 1-dstA, 1-dstA, 1-dstA */
|
|
|
|
} SDL_BlendFactor;
|
|
|
|
/**
|
|
* \brief Create a custom blend mode, which may or may not be supported by a given renderer
|
|
*
|
|
* \param srcColorFactor source color factor
|
|
* \param dstColorFactor destination color factor
|
|
* \param colorOperation color operation
|
|
* \param srcAlphaFactor source alpha factor
|
|
* \param dstAlphaFactor destination alpha factor
|
|
* \param alphaOperation alpha operation
|
|
*
|
|
* The result of the blend mode operation will be:
|
|
* dstRGB = dstRGB * dstColorFactor colorOperation srcRGB * srcColorFactor
|
|
* and
|
|
* dstA = dstA * dstAlphaFactor alphaOperation srcA * srcAlphaFactor
|
|
*/
|
|
extern DECLSPEC SDL_BlendMode SDLCALL SDL_ComposeCustomBlendMode(SDL_BlendFactor srcColorFactor,
|
|
SDL_BlendFactor dstColorFactor,
|
|
SDL_BlendOperation colorOperation,
|
|
SDL_BlendFactor srcAlphaFactor,
|
|
SDL_BlendFactor dstAlphaFactor,
|
|
SDL_BlendOperation alphaOperation);
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#include "close_code.h"
|
|
|
|
#endif /* SDL_blendmode_h_ */
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|