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- Future plans for Mesa. Device driver maintainers take notice.
- Comments on this stuff are welcome.
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- 1. Change device driver interface's function which take separate arrays of
- red, green, blue and alpha values to take array [n][4] of color components
- instead. For example:
-
- Currently:
-
- void (*WriteColorSpan)( GLcontext *ctx,
- GLuint n, GLint x, GLint y,
- const GLubyte red[], const GLubyte green[],
- const GLubyte blue[], const GLubyte alpha[],
- const GLubyte mask[] );
-
- Future:
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- void (*WriteColorSpan)( GLcontext *ctx,
- GLuint n, GLint x, GLint y,
- const GLubyte rgba[][4],
- const GLubyte mask[] );
-
- Reason:
- We can directly send GL_UNSIGNED_BYTE, GL_RGBA glDrawPixels data to
- the later function. Also, the device driver functions may be able to poke
- the 4-byte color directly to a 32-bpp frame buffer if the buffer's byte
- ordering matches the RGBA order. Otherwise, simple byte flipping within
- the word may be needed. We can possibly replace four 1-byte loads with
- one 1-word store. Maybe get better cache usage too.
-
- This will require changing all the device drivers, BTW.
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-
- 2. The glaux/gltk Mesa demos will be retired in a future release. The glaux
- and gltk libraries are hacks. GLUT should be used instead. GLUT includes
- many demos including GLUT versions of many of the glaux/gltk demos. Also,
- the OpenGL Programming Guide book now uses GLUT.
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-
- 3. Put Mesa device driver files into separate directories, such as:
- src/xmesa/
- src/glx/
- src/osmesa/
- src/windows/
- src/3dfx/
- src/svga/
- etc...
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- 4. Move README's X11-specific info into a README.X11 file.
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- 5. Optimize glDrawPixels, esp GL_UNSIGNED_BYTE GL_RGBA and
- GL_COLOR_INDEX formats.
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- 6. Pentium FP optimization (set FPU to lower precision where possible).
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