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i965/msaa: Enable 4x MSAA on Gen7.

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Basic 4x MSAA support now works on Gen7.  This patch enables it.

As with Gen6, MSAA support is still fairly preliminary.  In
particular, the following are not yet supported:
- 8x oversampling (Gen7 has hardware support for this, but we do not
  yet expose it).
- Fully general blits between MSAA and non-MSAA buffers.
- Formats other than RGBA8, DEPTH24, and STENCIL8.
- Centrold interpolation.
- Coverage parameters (glSampleCoverage, GL_SAMPLE_ALPHA_TO_COVERAGE,
  GL_SAMPLE_ALPHA_TO_ONE, GL_SAMPLE_COVERAGE, GL_SAMPLE_COVERAGE_VALUE,
  GL_SAMPLE_COVERAGE_INVERT).

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Paul Berry 2012-05-09 15:51:11 -07:00
parent 4725ba03ca
commit ab014adaed
2 changed files with 9 additions and 9 deletions
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12
src/mesa/drivers/dri/i965/gen6_multisample_state.c
View file

@ -36,10 +36,8 @@ gen6_emit_3dstate_multisample(struct brw_context *brw,
{
struct intel_context *intel = &brw->intel;
/* TODO: MSAA only implemented on Gen6 */
if (intel->gen != 6) {
assert(num_samples == 0);
}
/* TODO: 8x MSAA not implemented */
assert(num_samples <= 4);
int len = intel->gen >= 7 ? 4 : 3;
BEGIN_BATCH(len);
@ -62,10 +60,8 @@ gen6_emit_3dstate_sample_mask(struct brw_context *brw,
{
struct intel_context *intel = &brw->intel;
/* TODO: MSAA only implemented on Gen6 */
if (intel->gen != 6) {
assert(num_samples == 0);
}
/* TODO: 8x MSAA not implemented */
assert(num_samples <= 4);
BEGIN_BATCH(2);
OUT_BATCH(_3DSTATE_SAMPLE_MASK << 16 | (2 - 2));

6
src/mesa/drivers/dri/intel/intel_fbo.c
View file

@ -202,7 +202,11 @@ quantize_num_samples(struct intel_context *intel, unsigned num_samples)
else
return 0;
case 7:
/* TODO: MSAA only implemented on Gen6 */
/* TODO: Gen7 supports only 4x multisampling at the moment. */
if (num_samples > 0)
return 4;
else
return 0;
return 0;
default:
/* MSAA unsupported */