1Performance Tips 2================ 3 4Performance tips for software rendering: 5 6#. Turn off smooth shading when you don't need it (glShadeModel) 7#. Turn off depth buffering when you don't need it. 8#. Turn off dithering when not needed. 9#. Use double buffering as it's often faster than single buffering 10#. Compile in the X Shared Memory extension option if it's supported on 11 your system by adding -DSHM to CFLAGS and -lXext to XLIBS for your 12 system in the Make-config file. 13#. Recompile Mesa with more optimization if possible. 14#. Try to maximize the amount of drawing done between glBegin/glEnd 15 pairs. 16#. Use the MESA_BACK_BUFFER variable to find best performance in double 17 buffered mode. (X users only) 18#. Optimized polygon rasterizers are employed when: rendering into back 19 buffer which is an XImage RGB mode, not grayscale, not monochrome 20 depth buffering is GL_LESS, or disabled flat or smooth shading 21 dithered or non-dithered no other rasterization operations enabled 22 (blending, stencil, etc) 23#. Optimized line drawing is employed when: rendering into back buffer 24 which is an XImage RGB mode, not grayscale, not monochrome depth 25 buffering is GL_LESS or disabled flat shading dithered or 26 non-dithered no other rasterization operations enabled (blending, 27 stencil, etc) 28#. Textured polygons are fastest when: using a 3-component (RGB), 2-D 29 texture minification and magnification filters are GL_NEAREST texture 30 coordinate wrap modes for S and T are GL_REPEAT GL_DECAL environment 31 mode glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST ) depth 32 buffering is GL_LESS or disabled 33#. Lighting is fastest when: Two-sided lighting is disabled 34 GL_LIGHT_MODEL_LOCAL_VIEWER is false GL_COLOR_MATERIAL is disabled No 35 spot lights are used (all GL_SPOT_CUTOFFs are 180.0) No local lights 36 are used (all position W's are 0.0) All material and light 37 coefficients are >= zero 38#. XFree86 users: if you want to use 24-bit color try starting your X 39 server in 32-bit per pixel mode for better performance. That is, 40 start your X server with startx -- -bpp 32 instead of startx -- -bpp 41 24 42#. Try disabling dithering with the MESA_NO_DITHER environment variable. 43 If this env var is defined Mesa will disable dithering and the 44 command glEnable(GL_DITHER) will be ignored. 45