diff options
author | Chris Forbes <chrisf@ijw.co.nz> | 2013-10-27 12:09:51 +1300 |
---|---|---|
committer | Carl Worth <cworth@cworth.org> | 2013-12-12 15:59:49 -0800 |
commit | 4f247c28e5e626772804f713e0ec72bb517bb0cc (patch) | |
tree | a99c7b7c8106eb4183c77ea4d7145228f607cc09 | |
parent | 711b15ddb9c7ba74dfcf667e8f8ace9d11e58746 (diff) |
i965: Gen4-5: Include alpha func/ref in program key
V2: Better explanation of the rationale for doing this.
Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Eric Anholt <eric@anholt.net>
(cherry picked from commit 1080fc610ef20e376c3a54b3cee2be911df9f012)
-rw-r--r-- | src/mesa/drivers/dri/i965/brw_wm.c | 16 | ||||
-rw-r--r-- | src/mesa/drivers/dri/i965/brw_wm.h | 2 |
2 files changed, 18 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_wm.c b/src/mesa/drivers/dri/i965/brw_wm.c index 10ca5ff84a..1358f27786 100644 --- a/src/mesa/drivers/dri/i965/brw_wm.c +++ b/src/mesa/drivers/dri/i965/brw_wm.c @@ -287,6 +287,10 @@ brw_wm_debug_recompile(struct brw_context *brw, old_key->drawable_height, key->drawable_height); found |= key_debug(brw, "input slots valid", old_key->input_slots_valid, key->input_slots_valid); + found |= key_debug(brw, "mrt alpha test function", + old_key->alpha_test_func, key->alpha_test_func); + found |= key_debug(brw, "mrt alpha test reference value", + old_key->alpha_test_ref, key->alpha_test_ref); found |= brw_debug_recompile_sampler_key(brw, &old_key->tex, &key->tex); @@ -467,6 +471,18 @@ static void brw_wm_populate_key( struct brw_context *brw, if (brw->gen < 6) key->input_slots_valid = brw->vue_map_geom_out.slots_valid; + + /* _NEW_COLOR | _NEW_BUFFERS */ + /* Pre-gen6, the hardware alpha test always used each render + * target's alpha to do alpha test, as opposed to render target 0's alpha + * like GL requires. Fix that by building the alpha test into the + * shader, and we'll skip enabling the fixed function alpha test. + */ + if (brw->gen < 6 && ctx->DrawBuffer->_NumColorDrawBuffers > 1 && ctx->Color.AlphaEnabled) { + key->alpha_test_func = ctx->Color.AlphaFunc; + key->alpha_test_ref = ctx->Color.AlphaRef; + } + /* The unique fragment program ID */ key->program_string_id = fp->id; } diff --git a/src/mesa/drivers/dri/i965/brw_wm.h b/src/mesa/drivers/dri/i965/brw_wm.h index f7a2c5f234..8ad172ef2d 100644 --- a/src/mesa/drivers/dri/i965/brw_wm.h +++ b/src/mesa/drivers/dri/i965/brw_wm.h @@ -70,6 +70,8 @@ struct brw_wm_prog_key { GLushort drawable_height; GLbitfield64 input_slots_valid; GLuint program_string_id:32; + GLenum alpha_test_func; /* < For Gen4/5 MRT alpha test */ + float alpha_test_ref; struct brw_sampler_prog_key_data tex; }; |