Previously we only gave special treatment to the builtin color varyings. This patch adds support for arbitrary flat-shaded varyings, which is required for GLSL 1.30.
Based on Olivier Galibert's patch from last year: http://lists.freedesktop.org/archives/mesa-dev/2012-July/024340.html [V1-2]: Signed-off-by: Olivier Galibert <galibert at pobox.com> Signed-off-by: Chris Forbes <chr...@ijw.co.nz> --- src/mesa/drivers/dri/i965/brw_clip.c | 13 +++++-- src/mesa/drivers/dri/i965/brw_clip.h | 6 ++-- src/mesa/drivers/dri/i965/brw_clip_line.c | 6 ++-- src/mesa/drivers/dri/i965/brw_clip_tri.c | 18 +++++----- src/mesa/drivers/dri/i965/brw_clip_unfilled.c | 2 +- src/mesa/drivers/dri/i965/brw_clip_util.c | 51 +++++++-------------------- 6 files changed, 40 insertions(+), 56 deletions(-) diff --git a/src/mesa/drivers/dri/i965/brw_clip.c b/src/mesa/drivers/dri/i965/brw_clip.c index 488e0a0..7df4b18 100644 --- a/src/mesa/drivers/dri/i965/brw_clip.c +++ b/src/mesa/drivers/dri/i965/brw_clip.c @@ -186,6 +186,7 @@ brw_upload_clip_prog(struct brw_context *brw) { struct gl_context *ctx = &brw->ctx; struct brw_clip_prog_key key; + int i; memset(&key, 0, sizeof(key)); @@ -200,8 +201,16 @@ brw_upload_clip_prog(struct brw_context *brw) key.primitive = brw->reduced_primitive; /* BRW_NEW_VUE_MAP_GEOM_OUT */ key.attrs = brw->vue_map_geom_out.slots_valid; - /* _NEW_LIGHT */ - key.do_flat_shading = (ctx->Light.ShadeModel == GL_FLAT); + + /* BRW_NEW_FRAGMENT_PROGRAM, _NEW_LIGHT */ + key.has_flat_shading = 0; + for (i = 0; i < brw->vue_map_geom_out.num_slots; i++) { + if (key.interpolation_mode[i] == INTERP_QUALIFIER_FLAT) { + key.has_flat_shading = 1; + break; + } + } + key.pv_first = (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION); /* _NEW_TRANSFORM (also part of VUE map)*/ key.nr_userclip = _mesa_bitcount_64(ctx->Transform.ClipPlanesEnabled); diff --git a/src/mesa/drivers/dri/i965/brw_clip.h b/src/mesa/drivers/dri/i965/brw_clip.h index fcbe2a0..656254b 100644 --- a/src/mesa/drivers/dri/i965/brw_clip.h +++ b/src/mesa/drivers/dri/i965/brw_clip.h @@ -46,7 +46,7 @@ struct brw_clip_prog_key { unsigned char interpolation_mode[BRW_VARYING_SLOT_COUNT]; GLuint primitive:4; GLuint nr_userclip:4; - GLuint do_flat_shading:1; + GLuint has_flat_shading:1; GLuint pv_first:1; GLuint do_unfilled:1; GLuint fill_cw:2; /* includes cull information */ @@ -173,8 +173,8 @@ void brw_clip_kill_thread(struct brw_clip_compile *c); struct brw_reg brw_clip_plane_stride( struct brw_clip_compile *c ); struct brw_reg brw_clip_plane0_address( struct brw_clip_compile *c ); -void brw_clip_copy_colors( struct brw_clip_compile *c, - GLuint to, GLuint from ); +void brw_clip_copy_flatshaded_attributes( struct brw_clip_compile *c, + GLuint to, GLuint from ); void brw_clip_init_clipmask( struct brw_clip_compile *c ); diff --git a/src/mesa/drivers/dri/i965/brw_clip_line.c b/src/mesa/drivers/dri/i965/brw_clip_line.c index 9ce80b8..8df7d0c 100644 --- a/src/mesa/drivers/dri/i965/brw_clip_line.c +++ b/src/mesa/drivers/dri/i965/brw_clip_line.c @@ -272,11 +272,11 @@ void brw_emit_line_clip( struct brw_clip_compile *c ) brw_clip_line_alloc_regs(c); brw_clip_init_ff_sync(c); - if (c->key.do_flat_shading) { + if (c->key.has_flat_shading) { if (c->key.pv_first) - brw_clip_copy_colors(c, 1, 0); + brw_clip_copy_flatshaded_attributes(c, 1, 0); else - brw_clip_copy_colors(c, 0, 1); + brw_clip_copy_flatshaded_attributes(c, 0, 1); } clip_and_emit_line(c); diff --git a/src/mesa/drivers/dri/i965/brw_clip_tri.c b/src/mesa/drivers/dri/i965/brw_clip_tri.c index bea0853..ac24929 100644 --- a/src/mesa/drivers/dri/i965/brw_clip_tri.c +++ b/src/mesa/drivers/dri/i965/brw_clip_tri.c @@ -190,8 +190,8 @@ void brw_clip_tri_flat_shade( struct brw_clip_compile *c ) brw_IF(p, BRW_EXECUTE_1); { - brw_clip_copy_colors(c, 1, 0); - brw_clip_copy_colors(c, 2, 0); + brw_clip_copy_flatshaded_attributes(c, 1, 0); + brw_clip_copy_flatshaded_attributes(c, 2, 0); } brw_ELSE(p); { @@ -203,19 +203,19 @@ void brw_clip_tri_flat_shade( struct brw_clip_compile *c ) brw_imm_ud(_3DPRIM_TRIFAN)); brw_IF(p, BRW_EXECUTE_1); { - brw_clip_copy_colors(c, 0, 1); - brw_clip_copy_colors(c, 2, 1); + brw_clip_copy_flatshaded_attributes(c, 0, 1); + brw_clip_copy_flatshaded_attributes(c, 2, 1); } brw_ELSE(p); { - brw_clip_copy_colors(c, 1, 0); - brw_clip_copy_colors(c, 2, 0); + brw_clip_copy_flatshaded_attributes(c, 1, 0); + brw_clip_copy_flatshaded_attributes(c, 2, 0); } brw_ENDIF(p); } else { - brw_clip_copy_colors(c, 0, 2); - brw_clip_copy_colors(c, 1, 2); + brw_clip_copy_flatshaded_attributes(c, 0, 2); + brw_clip_copy_flatshaded_attributes(c, 1, 2); } } brw_ENDIF(p); @@ -645,7 +645,7 @@ void brw_emit_tri_clip( struct brw_clip_compile *c ) * flatshading, need to apply the flatshade here because we don't * respect the PV when converting to trifan for emit: */ - if (c->key.do_flat_shading) + if (c->key.has_flat_shading) brw_clip_tri_flat_shade(c); if ((c->key.clip_mode == BRW_CLIPMODE_NORMAL) || diff --git a/src/mesa/drivers/dri/i965/brw_clip_unfilled.c b/src/mesa/drivers/dri/i965/brw_clip_unfilled.c index e211b95..0e645c0 100644 --- a/src/mesa/drivers/dri/i965/brw_clip_unfilled.c +++ b/src/mesa/drivers/dri/i965/brw_clip_unfilled.c @@ -501,7 +501,7 @@ void brw_emit_unfilled_clip( struct brw_clip_compile *c ) /* Need to do this whether we clip or not: */ - if (c->key.do_flat_shading) + if (c->key.has_flat_shading) brw_clip_tri_flat_shade(c); brw_clip_init_clipmask(c); diff --git a/src/mesa/drivers/dri/i965/brw_clip_util.c b/src/mesa/drivers/dri/i965/brw_clip_util.c index 37b7734..8a21c1f 100644 --- a/src/mesa/drivers/dri/i965/brw_clip_util.c +++ b/src/mesa/drivers/dri/i965/brw_clip_util.c @@ -290,49 +290,24 @@ struct brw_reg brw_clip_plane_stride( struct brw_clip_compile *c ) } -/* If flatshading, distribute color from provoking vertex prior to +/* Distribute flatshaded attributes from provoking vertex prior to * clipping. */ -void brw_clip_copy_colors( struct brw_clip_compile *c, +void brw_clip_copy_flatshaded_attributes( struct brw_clip_compile *c, GLuint to, GLuint from ) { struct brw_compile *p = &c->func; - - if (brw_clip_have_varying(c, VARYING_SLOT_COL0)) - brw_MOV(p, - byte_offset(c->reg.vertex[to], - brw_varying_to_offset(&c->vue_map, - VARYING_SLOT_COL0)), - byte_offset(c->reg.vertex[from], - brw_varying_to_offset(&c->vue_map, - VARYING_SLOT_COL0))); - - if (brw_clip_have_varying(c, VARYING_SLOT_COL1)) - brw_MOV(p, - byte_offset(c->reg.vertex[to], - brw_varying_to_offset(&c->vue_map, - VARYING_SLOT_COL1)), - byte_offset(c->reg.vertex[from], - brw_varying_to_offset(&c->vue_map, - VARYING_SLOT_COL1))); - - if (brw_clip_have_varying(c, VARYING_SLOT_BFC0)) - brw_MOV(p, - byte_offset(c->reg.vertex[to], - brw_varying_to_offset(&c->vue_map, - VARYING_SLOT_BFC0)), - byte_offset(c->reg.vertex[from], - brw_varying_to_offset(&c->vue_map, - VARYING_SLOT_BFC0))); - - if (brw_clip_have_varying(c, VARYING_SLOT_BFC1)) - brw_MOV(p, - byte_offset(c->reg.vertex[to], - brw_varying_to_offset(&c->vue_map, - VARYING_SLOT_BFC1)), - byte_offset(c->reg.vertex[from], - brw_varying_to_offset(&c->vue_map, - VARYING_SLOT_BFC1))); + int i; + + for (i=0; i < c->vue_map.num_slots; i++) { + if (c->key.interpolation_mode[i] == INTERP_QUALIFIER_FLAT) { + printf("flatshaded: %d @ %d\n", i, + brw_vue_slot_to_offset(i)); + brw_MOV(p, + byte_offset(c->reg.vertex[to], brw_vue_slot_to_offset(i)), + byte_offset(c->reg.vertex[from], brw_vue_slot_to_offset(i))); + } + } } -- 1.8.3.2 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
