forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
2.3 KiB
44 lines
2.3 KiB
Performance Tips |
|
================ |
|
|
|
Performance tips for software rendering: |
|
|
|
#. Turn off smooth shading when you don't need it (glShadeModel) |
|
#. Turn off depth buffering when you don't need it. |
|
#. Turn off dithering when not needed. |
|
#. Use double buffering as it's often faster than single buffering |
|
#. Compile in the X Shared Memory extension option if it's supported on |
|
your system by adding -DSHM to CFLAGS and -lXext to XLIBS for your |
|
system in the Make-config file. |
|
#. Recompile Mesa with more optimization if possible. |
|
#. Try to maximize the amount of drawing done between glBegin/glEnd |
|
pairs. |
|
#. Use the MESA_BACK_BUFFER variable to find best performance in double |
|
buffered mode. (X users only) |
|
#. Optimized polygon rasterizers are employed when: rendering into back |
|
buffer which is an XImage RGB mode, not grayscale, not monochrome |
|
depth buffering is GL_LESS, or disabled flat or smooth shading |
|
dithered or non-dithered no other rasterization operations enabled |
|
(blending, stencil, etc) |
|
#. Optimized line drawing is employed when: rendering into back buffer |
|
which is an XImage RGB mode, not grayscale, not monochrome depth |
|
buffering is GL_LESS or disabled flat shading dithered or |
|
non-dithered no other rasterization operations enabled (blending, |
|
stencil, etc) |
|
#. Textured polygons are fastest when: using a 3-component (RGB), 2-D |
|
texture minification and magnification filters are GL_NEAREST texture |
|
coordinate wrap modes for S and T are GL_REPEAT GL_DECAL environment |
|
mode glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST ) depth |
|
buffering is GL_LESS or disabled |
|
#. Lighting is fastest when: Two-sided lighting is disabled |
|
GL_LIGHT_MODEL_LOCAL_VIEWER is false GL_COLOR_MATERIAL is disabled No |
|
spot lights are used (all GL_SPOT_CUTOFFs are 180.0) No local lights |
|
are used (all position W's are 0.0) All material and light |
|
coefficients are >= zero |
|
#. XFree86 users: if you want to use 24-bit color try starting your X |
|
server in 32-bit per pixel mode for better performance. That is, |
|
start your X server with startx -- -bpp 32 instead of startx -- -bpp |
|
24 |
|
#. Try disabling dithering with the MESA_NO_DITHER environment variable. |
|
If this env var is defined Mesa will disable dithering and the |
|
command glEnable(GL_DITHER) will be ignored.
|
|
|