OpenHarmony/third_party_mesa3d
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gallium: allow choosing which colorbuffers to clear

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Required for glClearBuffer, which only clears one colorbuffer attachment.

Example:
   If the first colorbuffer is float and the second one is int:
      pipe->clear(pipe, PIPE_CLEAR_COLOR0, float_clear_color, ...);
      pipe->clear(pipe, PIPE_CLEAR_COLOR1, int_clear_color, ...);

This doesn't need any driver changes yet, because all drivers just use:
  if (flags & PIPE_CLEAR_COLOR) ..

The drivers which support GL 3.0 will have to implement it properly though.
This commit is contained in:
Marek Olšák
2013-12-04 00:56:24 +01:00
parent 0612005aa6
commit 164dc6216a
6 changed files with 23 additions and 11 deletions
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src/gallium/drivers/r300/r300_blit.c
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@@ -130,7 +130,7 @@ static boolean r300_cbzb_clear_allowed(struct r300_context *r300,
(struct pipe_framebuffer_state*)r300->fb_state.state;
/* Only color clear allowed, and only one colorbuffer. */
if (clear_buffers != PIPE_CLEAR_COLOR || fb->nr_cbufs != 1)
if ((clear_buffers & ~PIPE_CLEAR_COLOR) != 0 || fb->nr_cbufs != 1)
return FALSE;
return r300_surface(fb->cbufs[0])->cbzb_allowed;