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Diffstat (limited to 'system/include/SDL/SDL_hints.h')
| -rw-r--r-- | system/include/SDL/SDL_hints.h | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/system/include/SDL/SDL_hints.h b/system/include/SDL/SDL_hints.h new file mode 100644 index 00000000..64323917 --- /dev/null +++ b/system/include/SDL/SDL_hints.h @@ -0,0 +1,206 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2011 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_hints.h + * + * Official documentation for SDL configuration variables + * + * This file contains functions to set and get configuration hints, + * as well as listing each of them alphabetically. + * + * The convention for naming hints is SDL_HINT_X, where "SDL_X" is + * the environment variable that can be used to override the default. + * + * In general these hints are just that - they may or may not be + * supported or applicable on any given platform, but they provide + * a way for an application or user to give the library a hint as + * to how they would like the library to work. + */ + +#ifndef _SDL_hints_h +#define _SDL_hints_h + +#include "SDL_stdinc.h" + +#include "begin_code.h" +/* Set up for C function definitions, even when using C++ */ +#ifdef __cplusplus +/* *INDENT-OFF* */ +extern "C" { +/* *INDENT-ON* */ +#endif + +/** + * \brief A variable controlling how 3D acceleration is used to accelerate the SDL 1.2 screen surface. + * + * SDL can try to accelerate the SDL 1.2 screen surface by using streaming + * textures with a 3D rendering engine. This variable controls whether and + * how this is done. + * + * This variable can be set to the following values: + * "0" - Disable 3D acceleration + * "1" - Enable 3D acceleration, using the default renderer. + * "X" - Enable 3D acceleration, using X where X is one of the valid rendering drivers. (e.g. "direct3d", "opengl", etc.) + * + * By default SDL tries to make a best guess for each platform whether + * to use acceleration or not. + */ +#define SDL_HINT_FRAMEBUFFER_ACCELERATION "SDL_FRAMEBUFFER_ACCELERATION" + +/** + * \brief A variable specifying which render driver to use. + * + * If the application doesn't pick a specific renderer to use, this variable + * specifies the name of the preferred renderer. If the preferred renderer + * can't be initialized, the normal default renderer is used. + * + * This variable is case insensitive and can be set to the following values: + * "direct3d" + * "opengl" + * "opengles2" + * "opengles" + * "software" + * + * The default varies by platform, but it's the first one in the list that + * is available on the current platform. + */ +#define SDL_HINT_RENDER_DRIVER "SDL_RENDER_DRIVER" + +/** + * \brief A variable controlling whether the OpenGL render driver uses shaders if they are available. + * + * This variable can be set to the following values: + * "0" - Disable shaders + * "1" - Enable shaders + * + * By default shaders are used if OpenGL supports them. + */ +#define SDL_HINT_RENDER_OPENGL_SHADERS "SDL_RENDER_OPENGL_SHADERS" + +/** + * \brief A variable controlling the scaling quality + * + * This variable can be set to the following values: + * "0" or "nearest" - Nearest pixel sampling + * "1" or "linear" - Linear filtering (supported by OpenGL and Direct3D) + * "2" or "best" - Anisotropic filtering (supported by Direct3D) + * + * By default nearest pixel sampling is used + */ +#define SDL_HINT_RENDER_SCALE_QUALITY "SDL_RENDER_SCALE_QUALITY" + +/** + * \brief A variable controlling whether updates to the SDL 1.2 screen surface should be synchronized with the vertical refresh, to avoid tearing. + * + * This variable can be set to the following values: + * "0" - Disable vsync + * "1" - Enable vsync + * + * By default SDL does not sync screen surface updates with vertical refresh. + */ +#define SDL_HINT_RENDER_VSYNC "SDL_RENDER_VSYNC" + +/** + * \brief A variable controlling whether the idle timer is disabled on iOS. + * + * When an iOS app does not receive touches for some time, the screen is + * dimmed automatically. For games where the accelerometer is the only input + * this is problematic. This functionality can be disabled by setting this + * hint. + * + * This variable can be set to the following values: + * "0" - Enable idle timer + * "1" - Disable idle timer + */ +#define SDL_HINT_IDLE_TIMER_DISABLED "SDL_IOS_IDLE_TIMER_DISABLED" + +/** + * \brief A variable controlling which orientations are allowed on iOS. + * + * In some circumstances it is necessary to be able to explicitly control + * which UI orientations are allowed. + * + * This variable is a space delimited list of the following values: + * "LandscapeLeft", "LandscapeRight", "Portrait" "PortraitUpsideDown" + */ +#define SDL_HINT_ORIENTATIONS "SDL_IOS_ORIENTATIONS" + + +/** + * \brief An enumeration of hint priorities + */ +typedef enum +{ + SDL_HINT_DEFAULT, + SDL_HINT_NORMAL, + SDL_HINT_OVERRIDE +} SDL_HintPriority; + + +/** + * \brief Set a hint with a specific priority + * + * The priority controls the behavior when setting a hint that already + * has a value. Hints will replace existing hints of their priority and + * lower. Environment variables are considered to have override priority. + * + * \return SDL_TRUE if the hint was set, SDL_FALSE otherwise + */ +extern DECLSPEC SDL_bool SDLCALL SDL_SetHintWithPriority(const char *name, + const char *value, + SDL_HintPriority priority); + +/** + * \brief Set a hint with normal priority + * + * \return SDL_TRUE if the hint was set, SDL_FALSE otherwise + */ +extern DECLSPEC SDL_bool SDLCALL SDL_SetHint(const char *name, + const char *value); + + +/** + * \brief Get a hint + * + * \return The string value of a hint variable. + */ +extern DECLSPEC const char * SDLCALL SDL_GetHint(const char *name); + +/** + * \brief Clear all hints + * + * This function is called during SDL_Quit() to free stored hints. + */ +extern DECLSPEC void SDLCALL SDL_ClearHints(void); + + +/* Ends C function definitions when using C++ */ +#ifdef __cplusplus +/* *INDENT-OFF* */ +} +/* *INDENT-ON* */ +#endif +#include "close_code.h" + +#endif /* _SDL_hints_h */ + +/* vi: set ts=4 sw=4 expandtab: */ |