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author | David Nusinow <[email protected]> | 2006-01-03 05:15:27 +0000 |
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committer | David Nusinow <[email protected]> | 2006-01-03 05:15:27 +0000 |
commit | df46b96ab0e5dabc7baa443c9065d66b5b9fd5ef (patch) | |
tree | 95d053225c4394c0673f6d920169ea2734b3b6d7 /docs/MESA_swap_control.spec | |
parent | bda1e332ce5efe2057421dec58202b43707a504c (diff) |
Re-add mesa-6.4.1 which was accidentally deleted
Diffstat (limited to 'docs/MESA_swap_control.spec')
-rw-r--r-- | docs/MESA_swap_control.spec | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/docs/MESA_swap_control.spec b/docs/MESA_swap_control.spec new file mode 100644 index 00000000000..ecc674649e2 --- /dev/null +++ b/docs/MESA_swap_control.spec @@ -0,0 +1,132 @@ +Name + + MESA_swap_control + +Name Strings + + GLX_MESA_swap_control + +Contact + + Ian Romanick, IBM, idr at us.ibm.com + +Status + + Deployed in DRI drivers post-XFree86 4.3. + +Version + + Date: 5/1/2003 Revision: 1.1 + +Number + + ??? + +Dependencies + + None + + Based on GLX_SGI_swap_control version 1.9 and WGL_EXT_swap_control + version 1.5. + +Overview + + This extension allows an application to specify a minimum periodicity + of color buffer swaps, measured in video frame periods. + +Issues + + * Should implementations that export GLX_MESA_swap_control also export + GL_EXT_swap_control for compatibility with WGL_EXT_swap_control? + + UNRESOLVED. + +New Procedures and Functions + + int glXSwapIntervalMESA(int interval) + int glXGetSwapIntervalMESA(void) + +New Tokens + + None + +Additions to Chapter 2 of the 1.4 GL Specification (OpenGL Operation) + + None + +Additions to Chapter 3 of the 1.4 GL Specification (Rasterization) + + None + +Additions to Chapter 4 of the 1.4 GL Specification (Per-Fragment Operations +and the Framebuffer) + + None + +Additions to Chapter 5 of the 1.4 GL Specification (Special Functions) + + None + +Additions to Chapter 6 of the 1.4 GL Specification (State and State Requests) + + None + +Additions to the GLX 1.3 Specification + + [Add the following to Section 3.3.10 of the GLX Specification (Double + Buffering)] + + glXSwapIntervalMESA specifies the minimum number of video frame periods + per buffer swap. (e.g. a value of two means that the color buffers + will be swapped at most every other video frame.) A return value + of zero indicates success; otherwise an error occurred. The interval + takes effect when glXSwapBuffers is first called subsequent to the + glXSwapIntervalMESA call. + + A video frame period is the time required by the monitor to display a + full frame of video data. In the case of an interlaced monitor, + this is typically the time required to display both the even and odd + fields of a frame of video data. + + If <interval> is set to a value of 0, buffer swaps are not synchron- + ized to a video frame. The <interval> value is silently clamped to + the maximum implementation-dependent value supported before being + stored. + + The swap interval is not part of the render context state. It cannot + be pushed or popped. The current swap interval for the window + associated with the current context can be obtained by calling + glXGetSwapIntervalMESA. The default swap interval is 0. + + On XFree86, setting the environment variable LIBGL_THROTTLE_REFRESH sets + the swap interval to 1. + +Errors + + glXSwapIntervalMESA returns GLX_BAD_VALUE if parameter <interval> is + less than zero. + + glXSwapIntervalMESA returns GLX_BAD_CONTEXT if there is no current + GLXContext. + +GLX Protocol + + None. This extension only extends to direct rendering contexts. + +New State + + Get Value Get Command Type Initial Value + --------- ----------- ---- ------------- + [swap interval] GetSwapInterval Z+ 0 + +New Implementation Dependent State + + None + + +Revision History + + 1.1, 5/1/03 Added the issues section and contact information. + Changed the default swap interval to 0. + 1.0, 3/17/03 Initial version based on GLX_SGI_swap_control and + WGL_EXT_swap_control. |