SDL_GL_GetAttribute
Use this function to get the actual value for an attribute from the current context.
Contents
Syntax
int SDL_GL_GetAttribute(SDL_GLattr attr,
int* value)
Function Parameters
attr |
the SDL_GLattr structure to query |
value |
a pointer filled in with the current value of attr |
Return Value
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
Code Examples
You can add your code example here
Remarks
attr may be one of the following:
SDL_GL_RED_SIZE |
the minimum number of bits for the red channel of the color buffer; defaults to 3 |
SDL_GL_GREEN_SIZE |
the minimum number of bits for the green channel of the color buffer; defaults to 3 |
SDL_GL_BLUE_SIZE |
the minimum number of bits for the blue channel of the color buffer; defaults to 2 |
SDL_GL_ALPHA_SIZE |
the minimum number of bits for the alpha channel of the color buffer; defaults to 0 |
SDL_GL_BUFFER_SIZE |
the minimum number of bits for frame buffer size; defaults to 0 |
SDL_GL_DOUBLEBUFFER |
whether the output is single or double buffered; defaults to double buffering on |
SDL_GL_DEPTH_SIZE |
the minimum number of bits in the depth buffer; defaults to 16 |
SDL_GL_STENCIL_SIZE |
the minimum number of bits in the stencil buffer; defaults to 0 |
SDL_GL_ACCUM_RED_SIZE |
the minimum number of bits for the red channel of the accumulation buffer; defaults to 0 |
SDL_GL_ACCUM_GREEN_SIZE |
the minimum number of bits for the green channel of the accumulation buffer; defaults to 0 |
SDL_GL_ACCUM_BLUE_SIZE |
the minimum number of bits for the blue channel of the accumulation buffer; defaults to 0 |
SDL_GL_ACCUM_ALPHA_SIZE |
the minimum number of bits for the alpha channel of the accumulation buffer; defaults to 0 |
SDL_GL_STEREO |
whether the output is stereo 3D; defaults to off |
SDL_GL_MULTISAMPLEBUFFERS |
the number of buffers used for multisample anti-aliasing; defaults to 0; see Remarks for details |
SDL_GL_MULTISAMPLESAMPLES |
the number of samples used around the current pixel used for multisample anti-aliasing; defaults to 0; see Remarks for details |
SDL_GL_ACCELERATED_VISUAL |
set to 1 to require hardware acceleration, set to 0 to force software rendering; defaults to allow either |
SDL_GL_RETAINED_BACKING |
not used (deprecated) |
SDL_GL_CONTEXT_MAJOR_VERSION |
OpenGL context major version; see Remarks for details |
SDL_GL_CONTEXT_MINOR_VERSION |
OpenGL context minor version; see Remarks for details |
SDL_GL_CONTEXT_FLAGS |
some combination of 0 or more of elements of the SDL_GLcontextFlag enumeration; defaults to 0 |
SDL_GL_CONTEXT_PROFILE_MASK |
type of GL context (Core, Compatibility, ES). See SDL_GLprofile; default value depends on platform |
SDL_GL_SHARE_WITH_CURRENT_CONTEXT |
OpenGL context sharing; defaults to 0 |
SDL_GL_FRAMEBUFFER_SRGB_CAPABLE |
requests sRGB capable visual; defaults to 0 (>= SDL 2.0.1) |
SDL_GL_CONTEXT_RELEASE_BEHAVIOR |
sets context the release behavior; defaults to 1 (>= SDL 2.0.4) |
SDL_GL_CONTEXT_EGL |
not used (deprecated) |
