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45 lines
2.3 KiB
ReStructuredText
45 lines
2.3 KiB
ReStructuredText
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Performance Tips
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Performance tips for software rendering:
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#. Turn off smooth shading when you don't need it (glShadeModel)
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#. Turn off depth buffering when you don't need it.
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#. Turn off dithering when not needed.
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#. Use double buffering as it's often faster than single buffering
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#. Compile in the X Shared Memory extension option if it's supported on
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your system by adding -DSHM to CFLAGS and -lXext to XLIBS for your
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system in the Make-config file.
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#. Recompile Mesa with more optimization if possible.
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#. Try to maximize the amount of drawing done between glBegin/glEnd
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pairs.
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#. Use the MESA_BACK_BUFFER variable to find best performance in double
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buffered mode. (X users only)
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#. Optimized polygon rasterizers are employed when: rendering into back
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buffer which is an XImage RGB mode, not grayscale, not monochrome
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depth buffering is GL_LESS, or disabled flat or smooth shading
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dithered or non-dithered no other rasterization operations enabled
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(blending, stencil, etc)
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#. Optimized line drawing is employed when: rendering into back buffer
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which is an XImage RGB mode, not grayscale, not monochrome depth
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buffering is GL_LESS or disabled flat shading dithered or
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non-dithered no other rasterization operations enabled (blending,
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stencil, etc)
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#. Textured polygons are fastest when: using a 3-component (RGB), 2-D
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texture minification and magnification filters are GL_NEAREST texture
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coordinate wrap modes for S and T are GL_REPEAT GL_DECAL environment
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mode glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST ) depth
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buffering is GL_LESS or disabled
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#. Lighting is fastest when: Two-sided lighting is disabled
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GL_LIGHT_MODEL_LOCAL_VIEWER is false GL_COLOR_MATERIAL is disabled No
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spot lights are used (all GL_SPOT_CUTOFFs are 180.0) No local lights
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are used (all position W's are 0.0) All material and light
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coefficients are >= zero
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#. XFree86 users: if you want to use 24-bit color try starting your X
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server in 32-bit per pixel mode for better performance. That is,
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start your X server with startx -- -bpp 32 instead of startx -- -bpp
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24
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#. Try disabling dithering with the MESA_NO_DITHER environment variable.
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If this env var is defined Mesa will disable dithering and the
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command glEnable(GL_DITHER) will be ignored.
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