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thirdparty/SDL/include/SDL_hints.h
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thirdparty/SDL/include/SDL_hints.h
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/*
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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_hints.h
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*
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* Official documentation for SDL configuration variables
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*
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* This file contains functions to set and get configuration hints,
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* as well as listing each of them alphabetically.
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*
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* The convention for naming hints is SDL_HINT_X, where "SDL_X" is
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* the environment variable that can be used to override the default.
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*
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* In general these hints are just that - they may or may not be
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* supported or applicable on any given platform, but they provide
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* a way for an application or user to give the library a hint as
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* to how they would like the library to work.
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*/
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#ifndef _SDL_hints_h
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#define _SDL_hints_h
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#include "SDL_stdinc.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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* \brief A variable controlling how 3D acceleration is used to accelerate the SDL 1.2 screen surface.
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*
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* SDL can try to accelerate the SDL 1.2 screen surface by using streaming
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* textures with a 3D rendering engine. This variable controls whether and
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* how this is done.
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*
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* This variable can be set to the following values:
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* "0" - Disable 3D acceleration
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* "1" - Enable 3D acceleration, using the default renderer.
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* "X" - Enable 3D acceleration, using X where X is one of the valid rendering drivers. (e.g. "direct3d", "opengl", etc.)
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*
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* By default SDL tries to make a best guess for each platform whether
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* to use acceleration or not.
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*/
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#define SDL_HINT_FRAMEBUFFER_ACCELERATION "SDL_FRAMEBUFFER_ACCELERATION"
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/**
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* \brief A variable specifying which render driver to use.
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*
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* If the application doesn't pick a specific renderer to use, this variable
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* specifies the name of the preferred renderer. If the preferred renderer
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* can't be initialized, the normal default renderer is used.
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*
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* This variable is case insensitive and can be set to the following values:
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* "direct3d"
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* "opengl"
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* "opengles2"
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* "opengles"
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* "software"
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*
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* The default varies by platform, but it's the first one in the list that
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* is available on the current platform.
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*/
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#define SDL_HINT_RENDER_DRIVER "SDL_RENDER_DRIVER"
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/**
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* \brief A variable controlling whether the OpenGL render driver uses shaders if they are available.
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*
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* This variable can be set to the following values:
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* "0" - Disable shaders
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* "1" - Enable shaders
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*
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* By default shaders are used if OpenGL supports them.
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*/
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#define SDL_HINT_RENDER_OPENGL_SHADERS "SDL_RENDER_OPENGL_SHADERS"
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/**
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* \brief A variable controlling the scaling quality
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*
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* This variable can be set to the following values:
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* "0" or "nearest" - Nearest pixel sampling
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* "1" or "linear" - Linear filtering (supported by OpenGL and Direct3D)
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* "2" or "best" - Anisotropic filtering (supported by Direct3D)
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*
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* By default nearest pixel sampling is used
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*/
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#define SDL_HINT_RENDER_SCALE_QUALITY "SDL_RENDER_SCALE_QUALITY"
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/**
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* \brief A variable controlling whether updates to the SDL 1.2 screen surface should be synchronized with the vertical refresh, to avoid tearing.
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*
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* This variable can be set to the following values:
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* "0" - Disable vsync
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* "1" - Enable vsync
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*
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* By default SDL does not sync screen surface updates with vertical refresh.
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*/
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#define SDL_HINT_RENDER_VSYNC "SDL_RENDER_VSYNC"
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/**
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* \brief An enumeration of hint priorities
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*/
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typedef enum
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{
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SDL_HINT_DEFAULT,
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SDL_HINT_NORMAL,
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SDL_HINT_OVERRIDE
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} SDL_HintPriority;
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/**
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* \brief Set a hint with a specific priority
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*
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* The priority controls the behavior when setting a hint that already
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* has a value. Hints will replace existing hints of their priority and
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* lower. Environment variables are considered to have override priority.
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*
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* \return SDL_TRUE if the hint was set, SDL_FALSE otherwise
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*/
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extern DECLSPEC SDL_bool SDLCALL SDL_SetHintWithPriority(const char *name,
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const char *value,
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SDL_HintPriority priority);
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/**
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* \brief Set a hint with normal priority
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*
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* \return SDL_TRUE if the hint was set, SDL_FALSE otherwise
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*/
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extern DECLSPEC SDL_bool SDLCALL SDL_SetHint(const char *name,
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const char *value);
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/**
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* \brief Get a hint
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*
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* \return The string value of a hint variable.
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*/
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extern DECLSPEC const char * SDLCALL SDL_GetHint(const char *name);
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/**
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* \brief Clear all hints
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*
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* This function is called during SDL_Quit() to free stored hints.
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*/
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extern DECLSPEC void SDLCALL SDL_ClearHints(void);
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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_hints_h */
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/* vi: set ts=4 sw=4 expandtab: */
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