src/gallium/drivers/i915/TODO

   1 Random list of problems with i915g:
   2
   3 - Add support for PIPE_CAP_POINT_SPRITE either via the draw module or directly
   4   via the hardware, look at the classic driver, more advanced.
   5
   6 - What does this button do? Figure out LIS7 with regards to depth offset.
   7
   8 - Dies with BadDrawable on GLXFBconfig changes/destruction. Makes piglit totally
   9   unusable :( Upgrading xserver helped here, it doesn't crash anymore. Still
  10   broken, it doesn't update the viewport/get new buffers.
  11
  12 - Kills the chip in 3D_PRIMITIVE LINELIST with mesa-demos/fbotexture in
  13   wireframe mode. Changing the cullmode to cw from none mitigates the crash. As
  14   does emitting only one line segment (2 indices) per 3D_PRIMITIVE command in
  15   the batch.
  16
  17 - Y-tiling is even more fun. i915c doesn't use it, maybe there's a reason?
  18   Texture sampling from Y-tiled buffers seems to work, though (save above
  19   problems).
  20   RESOLVED: Y-tiling works with the render engine, but not with the blitter.
  21   Use u_blitter and hw clears (PRIM3D_CLEAR_RECT).
  22
  23 - src/xvmc/i915_structs.h in xf86-video-intel has a few more bits of various
  24   commands defined. Scavenge them and see what's useful.
  25
  26 - Do smarter remapping. Right now we send everything onto tex coords 0-7.
  27   We could also use diffuse/specular and pack two sets of 2D coords in a single
  28   4D. Is it a big problem though? We're more limited by the # of texture
  29   indirections and the # of instructions.
  30
  31 - Finish front/back face. We need to add face support to lp_build_system_values_array and use it in draw_llvm.c.
  32
  33 - More optimizations, like replacing ADD + MUL with MAD or use DP2ADD.
  34
  35 - Replace constants and immediates which are 0,1,-1 or a combination of those with a swizzle.
  36
  37 - i915_delete_fs_state doesn't call draw_delete_fragment_shader. Why?
  38
  39 Other bugs can be found here:
  40 https://bugs.freedesktop.org/buglist.cgi?bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&component=Drivers/Gallium/i915g