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author | marha <marha@users.sourceforge.net> | 2009-10-09 06:31:44 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-10-09 06:31:44 +0000 |
commit | 06456f5db88b434c3634ede42bdbfdce78fc4249 (patch) | |
tree | 97f5174e2d3da40faee7f2ad8858233da3d0166e /mesalib/docs/MESA_window_pos.spec | |
parent | 7b230a3fe2d6c83488d9eec43067fe8ba8ac081b (diff) | |
parent | a0c4815433ccd57322f4f7703ca35e9ccfa59250 (diff) | |
download | vcxsrv-06456f5db88b434c3634ede42bdbfdce78fc4249.tar.gz vcxsrv-06456f5db88b434c3634ede42bdbfdce78fc4249.tar.bz2 vcxsrv-06456f5db88b434c3634ede42bdbfdce78fc4249.zip |
svn merge ^/branches/released . --username marha
Diffstat (limited to 'mesalib/docs/MESA_window_pos.spec')
-rw-r--r-- | mesalib/docs/MESA_window_pos.spec | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/mesalib/docs/MESA_window_pos.spec b/mesalib/docs/MESA_window_pos.spec new file mode 100644 index 000000000..4d01f1814 --- /dev/null +++ b/mesalib/docs/MESA_window_pos.spec @@ -0,0 +1,126 @@ +Name + + MESA_window_pos + +Name Strings + + GL_MESA_window_pos + +Contact + + Brian Paul, brian.paul 'at' tungstengraphics.com + +Status + + Shipping (since Mesa version 1.2.8) + +Version + + +Number + + 197 + +Dependencies + + OpenGL 1.0 is required. + The extension is written against the OpenGL 1.2 Specification + +Overview + + In order to set the current raster position to a specific window + coordinate with the RasterPos command, the modelview matrix, projection + matrix and viewport must be set very carefully. Furthermore, if the + desired window coordinate is outside of the window's bounds one must + rely on a subtle side-effect of the Bitmap command in order to circumvent + frustum clipping. + + This extension provides a set of functions to directly set the + current raster position, bypassing the modelview matrix, the + projection matrix and the viewport to window mapping. Furthermore, + clip testing is not performed. + + This greatly simplifies the process of setting the current raster + position to a specific window coordinate prior to calling DrawPixels, + CopyPixels or Bitmap. + +New Procedures and Functions + + void WindowPos2dMESA(double x, double y) + void WindowPos2fMESA(float x, float y) + void WindowPos2iMESA(int x, int y) + void WindowPos2sMESA(short x, short y) + void WindowPos2ivMESA(const int *p) + void WindowPos2svMESA(const short *p) + void WindowPos2fvMESA(const float *p) + void WindowPos2dvMESA(const double *p) + void WindowPos3iMESA(int x, int y, int z) + void WindowPos3sMESA(short x, short y, short z) + void WindowPos3fMESA(float x, float y, float z) + void WindowPos3dMESA(double x, double y, double z) + void WindowPos3ivMESA(const int *p) + void WindowPos3svMESA(const short *p) + void WindowPos3fvMESA(const float *p) + void WindowPos3dvMESA(const double *p) + void WindowPos4iMESA(int x, int y, int z, int w) + void WindowPos4sMESA(short x, short y, short z, short w) + void WindowPos4fMESA(float x, float y, float z, float w) + void WindowPos4dMESA(double x, double y, double z, double ) + void WindowPos4ivMESA(const int *p) + void WindowPos4svMESA(const short *p) + void WindowPos4fvMESA(const float *p) + void WindowPos4dvMESA(const double *p) + +New Tokens + + none + +Additions to Chapter 2 of the OpenGL 1.2 Specification (OpenGL Operation) + + - (2.12, p. 41) Insert after third paragraph: + + Alternately, the current raster position may be set by one of the + WindowPosMESA commands: + + void WindowPos{234}{sidf}MESA( T coords ); + void WindowPos{234}{sidf}vMESA( T coords ); + + WindosPos4MESA takes four values indicating x, y, z, and w. + WindowPos3MESA (or WindowPos2MESA) is analaguos, but sets only + x, y, and z with w implicitly set to 1 (or only x and y with z + implicititly set to 0 and w implicitly set to 1). + + WindowPosMESA operates like RasterPos except that the current modelview + matrix, projection matrix and viewport parameters are ignored and the + clip test operation always passes. The current raster position values + are directly set to the parameters passed to WindowPosMESA. The current + color, color index and texture coordinate update the current raster + position's associated data. + +Additions to the AGL/GLX/WGL Specifications + + None + +GLX Protocol + + Not specified at this time. However, a protocol message very similar + to that of RasterPos is expected. + +Errors + + INVALID_OPERATION is generated if WindowPosMESA is called betweeen + Begin and End. + +New State + + None. + +New Implementation Dependent State + + None. + +Revision History + + * Revision 1.0 - Initial specification + * Revision 1.1 - Minor clean-up (7 Jan 2000, Brian Paul) + |