q3rally/engine/code/SDL2/include/SDL_blendmode.h
Zack Middleton 22a0949a26 ioquake3 resync to commit 4610a240 from bc8737d7
Upgrade to build and run from VS2019
Upgrades to Xcode project and Apple Silicon support
Update SDL2 to 2.0.14
Updated SDL2 include files to fix Mac build in GitHub Actions
Added another mention of arm64 to command line help
Restored original opus sse files, excluded from Xcode
Added arm64 to the post-build symlinking step
Merge branch 'main' into xcode
Merge branch 'main' into vs2019
Added shell script to compile Universal 2 binary (x86_64+arm64)
Reverting alert style to deprecated methods
Upgrades to Xcode project and Apple Silicon support
Update SDL2 to 2.0.14
Added another mention of arm64 to command line help
Restored original opus sse files, excluded from Xcode
Added arm64 to the post-build symlinking step
Added shell script to compile Universal 2 binary (x86_64+arm64)
Reverting alert style to deprecated methods
Merge branch 'xcode' of https://github.com/tomkidd/ioq3 into xcode
Removed signature from SDL dylib, enabled dark mode on macOS.
spaces > tabs
Ad-hoc signed libSDL2-2.0.0.dylib
Fix compiling against SDL 2.0.17
UB2 now signs and notarizes, upgraded to SDL 2.0.16
Architectures in libSDL2 restored for ppc and i386
Merge remote-tracking branch 'upstream/main' into vs2019
Update SDL2 to 2.0.16
Added rudimentary support for automatically finding Microsoft Store version of Quake 3
GHA deprecated Ubuntu 16.04 - update to 18.04
qsort cannot be called with NULL
Merge remote-tracking branch 'upstream/main' into vs2019
Addressed string concatenation issue and added dummy method for Mac/Linux
Added missing variable.
Merge remote-tracking branch 'upstream/main' into xcode
Updated SDL 2.0.16 headers and Mac version of libraries to fix GitHub actions
Addressed PR suggestions
Modified MS Store path handling to better follow the pattern of Steam/GOG
Merge pull request #481 from tomkidd/xcode
Merge pull request #482 from tomkidd/vs2019
OpenGL2: Fix r_grayscale 1 making everything solid black
Print full GL_EXTENSIONS list for OpenGL contexts before 3.0
Fix being unable to enter Team Arena CD key
OpenGL2: GL_DEPTH_TEXTURE_MODE was removed from OpenGL 3.0/Core
Improve setting Microsoft Store path
Update building for macOS in README
Make macOS arm64 default to target macOS 11 in Makefile
Fix error when cross-compiling for macOS arm64 using Makefile
Fix passing arguments to VM dylib on Apple M1
Fix compiling on older macOS
Fix memory corruption in S_TransferPaintBuffer
Fix memset
Fix hex digit
Fix uninitialized variable
some old URL and doc updates
Update README.md
Update FUNDING.yml
code/curl: update ifdef condition for MCST-LCC compiler in mcst-lcc compiler => 1.25 added a new macro definition to determine compiler
Revert "code/curl: update ifdef condition for MCST-LCC compiler"
Revert "E2K: fixed build by MCST lcc compiler when using USE_CURL=1 option"
More predictable mesh normals generation
vm_x86.c: Add `defined(_M_IX86) || defined(_M_X64)` (fix for VS2019)
Add keys for SDL 2.0.14's new gamepad buttons
Fix in_availableJoysticks cvar not updating
Fix (disabled) Wavelet sound decompression
Update to SDL 2.24.0 and add separate macOS UB2 dylib
Update macOS UB1 to SDL 2.0.22
Fix running make-macosx{,-ub2}.sh on Linux
Update MSVC .lib files to SDL 2.24.0
2023-03-02 23:13:18 -06:00

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C

/*
Simple DirectMedia Layer
Copyright (C) 1997-2022 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_MUL = 0x00000008, /**< color multiply
dstRGB = (srcRGB * dstRGB) + (dstRGB * (1-srcA))
dstA = (srcA * dstA) + (dstA * (1-srcA)) */
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 D3D9, D3D11 */
SDL_BLENDOPERATION_MAXIMUM = 0x5 /**< max(dst, src) : supported by D3D9, 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;
/**
* Compose a custom blend mode for renderers.
*
* The functions SDL_SetRenderDrawBlendMode and SDL_SetTextureBlendMode accept
* the SDL_BlendMode returned by this function if the renderer supports it.
*
* A blend mode controls how the pixels from a drawing operation (source) get
* combined with the pixels from the render target (destination). First, the
* components of the source and destination pixels get multiplied with their
* blend factors. Then, the blend operation takes the two products and
* calculates the result that will get stored in the render target.
*
* Expressed in pseudocode, it would look like this:
*
* ```c
* dstRGB = colorOperation(srcRGB * srcColorFactor, dstRGB * dstColorFactor);
* dstA = alphaOperation(srcA * srcAlphaFactor, dstA * dstAlphaFactor);
* ```
*
* Where the functions `colorOperation(src, dst)` and `alphaOperation(src,
* dst)` can return one of the following:
*
* - `src + dst`
* - `src - dst`
* - `dst - src`
* - `min(src, dst)`
* - `max(src, dst)`
*
* The red, green, and blue components are always multiplied with the first,
* second, and third components of the SDL_BlendFactor, respectively. The
* fourth component is not used.
*
* The alpha component is always multiplied with the fourth component of the
* SDL_BlendFactor. The other components are not used in the alpha
* calculation.
*
* Support for these blend modes varies for each renderer. To check if a
* specific SDL_BlendMode is supported, create a renderer and pass it to
* either SDL_SetRenderDrawBlendMode or SDL_SetTextureBlendMode. They will
* return with an error if the blend mode is not supported.
*
* This list describes the support of custom blend modes for each renderer in
* SDL 2.0.6. All renderers support the four blend modes listed in the
* SDL_BlendMode enumeration.
*
* - **direct3d**: Supports all operations with all factors. However, some
* factors produce unexpected results with `SDL_BLENDOPERATION_MINIMUM` and
* `SDL_BLENDOPERATION_MAXIMUM`.
* - **direct3d11**: Same as Direct3D 9.
* - **opengl**: Supports the `SDL_BLENDOPERATION_ADD` operation with all
* factors. OpenGL versions 1.1, 1.2, and 1.3 do not work correctly with SDL
* 2.0.6.
* - **opengles**: Supports the `SDL_BLENDOPERATION_ADD` operation with all
* factors. Color and alpha factors need to be the same. OpenGL ES 1
* implementation specific: May also support `SDL_BLENDOPERATION_SUBTRACT`
* and `SDL_BLENDOPERATION_REV_SUBTRACT`. May support color and alpha
* operations being different from each other. May support color and alpha
* factors being different from each other.
* - **opengles2**: Supports the `SDL_BLENDOPERATION_ADD`,
* `SDL_BLENDOPERATION_SUBTRACT`, `SDL_BLENDOPERATION_REV_SUBTRACT`
* operations with all factors.
* - **psp**: No custom blend mode support.
* - **software**: No custom blend mode support.
*
* Some renderers do not provide an alpha component for the default render
* target. The `SDL_BLENDFACTOR_DST_ALPHA` and
* `SDL_BLENDFACTOR_ONE_MINUS_DST_ALPHA` factors do not have an effect in this
* case.
*
* \param srcColorFactor the SDL_BlendFactor applied to the red, green, and
* blue components of the source pixels
* \param dstColorFactor the SDL_BlendFactor applied to the red, green, and
* blue components of the destination pixels
* \param colorOperation the SDL_BlendOperation used to combine the red,
* green, and blue components of the source and
* destination pixels
* \param srcAlphaFactor the SDL_BlendFactor applied to the alpha component of
* the source pixels
* \param dstAlphaFactor the SDL_BlendFactor applied to the alpha component of
* the destination pixels
* \param alphaOperation the SDL_BlendOperation used to combine the alpha
* component of the source and destination pixels
* \returns an SDL_BlendMode that represents the chosen factors and
* operations.
*
* \since This function is available since SDL 2.0.6.
*
* \sa SDL_SetRenderDrawBlendMode
* \sa SDL_GetRenderDrawBlendMode
* \sa SDL_SetTextureBlendMode
* \sa SDL_GetTextureBlendMode
*/
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: */