#include "brw_util.h"
#include "intel_batchbuffer.h"
#include "main/macros.h"
-
-struct gen6_blend_state_key {
- GLboolean color_blend, alpha_enabled;
- GLboolean dither;
-
- GLenum logic_op;
-
- GLenum blend_eq_rgb, blend_eq_a;
- GLenum blend_src_rgb, blend_src_a;
- GLenum blend_dst_rgb, blend_dst_a;
-
- GLenum alpha_func;
-};
+#include "main/enums.h"
+#include "main/glformats.h"
+#include "main/stencil.h"
static void
-blend_state_populate_key(struct brw_context *brw,
- struct gen6_blend_state_key *key)
+gen6_upload_blend_state(struct brw_context *brw)
{
- GLcontext *ctx = &brw->intel.ctx;
-
- memset(key, 0, sizeof(*key));
-
- /* _NEW_COLOR */
- if (ctx->Color._LogicOpEnabled)
- key->logic_op = ctx->Color.LogicOp;
- else
- key->logic_op = GL_COPY;
-
- /* _NEW_COLOR */
- key->color_blend = ctx->Color.BlendEnabled;
- if (key->color_blend) {
- key->blend_eq_rgb = ctx->Color.BlendEquationRGB;
- key->blend_eq_a = ctx->Color.BlendEquationA;
- key->blend_src_rgb = ctx->Color.BlendSrcRGB;
- key->blend_dst_rgb = ctx->Color.BlendDstRGB;
- key->blend_src_a = ctx->Color.BlendSrcA;
- key->blend_dst_a = ctx->Color.BlendDstA;
- }
-
- /* _NEW_COLOR */
- key->alpha_enabled = ctx->Color.AlphaEnabled;
- if (key->alpha_enabled) {
- key->alpha_func = ctx->Color.AlphaFunc;
- }
+ bool is_buffer_zero_integer_format = false;
+ struct gl_context *ctx = &brw->ctx;
+ struct gen6_blend_state *blend;
+ int b;
+ int nr_draw_buffers = ctx->DrawBuffer->_NumColorDrawBuffers;
+ int size;
+
+ /* We need at least one BLEND_STATE written, because we might do
+ * thread dispatch even if _NumColorDrawBuffers is 0 (for example
+ * for computed depth or alpha test), which will do an FB write
+ * with render target 0, which will reference BLEND_STATE[0] for
+ * alpha test enable.
+ */
+ if (nr_draw_buffers == 0 && ctx->Color.AlphaEnabled)
+ nr_draw_buffers = 1;
+
+ size = sizeof(*blend) * nr_draw_buffers;
+ blend = brw_state_batch(brw, AUB_TRACE_BLEND_STATE,
+ size, 64, &brw->cc.blend_state_offset);
+
+ memset(blend, 0, size);
+
+ for (b = 0; b < nr_draw_buffers; b++) {
+ /* _NEW_BUFFERS */
+ struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[b];
+ GLenum rb_type;
+ bool integer;
+
+ if (rb)
+ rb_type = _mesa_get_format_datatype(rb->Format);
+ else
+ rb_type = GL_UNSIGNED_NORMALIZED;
+
+ /* Used for implementing the following bit of GL_EXT_texture_integer:
+ * "Per-fragment operations that require floating-point color
+ * components, including multisample alpha operations, alpha test,
+ * blending, and dithering, have no effect when the corresponding
+ * colors are written to an integer color buffer."
+ */
+ integer = (rb_type == GL_INT || rb_type == GL_UNSIGNED_INT);
+
+ if(b == 0 && integer)
+ is_buffer_zero_integer_format = true;
+
+ /* _NEW_COLOR */
+ if (ctx->Color.ColorLogicOpEnabled) {
+ /* Floating point RTs should have no effect from LogicOp,
+ * except for disabling of blending, but other types should.
+ *
+ * However, from the Sandy Bridge PRM, Vol 2 Par 1, Section 8.1.11,
+ * "Logic Ops",
+ *
+ * "Logic Ops are only supported on *_UNORM surfaces (excluding
+ * _SRGB variants), otherwise Logic Ops must be DISABLED."
+ */
+ WARN_ONCE(ctx->Color.LogicOp != GL_COPY &&
+ rb_type != GL_UNSIGNED_NORMALIZED &&
+ rb_type != GL_FLOAT, "Ignoring %s logic op on %s "
+ "renderbuffer\n",
+ _mesa_lookup_enum_by_nr(ctx->Color.LogicOp),
+ _mesa_lookup_enum_by_nr(rb_type));
+ if (rb_type == GL_UNSIGNED_NORMALIZED) {
+ blend[b].blend1.logic_op_enable = 1;
+ blend[b].blend1.logic_op_func =
+ intel_translate_logic_op(ctx->Color.LogicOp);
+ }
+ } else if (ctx->Color.BlendEnabled & (1 << b) && !integer) {
+ GLenum eqRGB = ctx->Color.Blend[b].EquationRGB;
+ GLenum eqA = ctx->Color.Blend[b].EquationA;
+ GLenum srcRGB = ctx->Color.Blend[b].SrcRGB;
+ GLenum dstRGB = ctx->Color.Blend[b].DstRGB;
+ GLenum srcA = ctx->Color.Blend[b].SrcA;
+ GLenum dstA = ctx->Color.Blend[b].DstA;
+
+ if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
+ srcRGB = dstRGB = GL_ONE;
+ }
+
+ if (eqA == GL_MIN || eqA == GL_MAX) {
+ srcA = dstA = GL_ONE;
+ }
+
+ /* Due to hardware limitations, the destination may have information
+ * in an alpha channel even when the format specifies no alpha
+ * channel. In order to avoid getting any incorrect blending due to
+ * that alpha channel, coerce the blend factors to values that will
+ * not read the alpha channel, but will instead use the correct
+ * implicit value for alpha.
+ */
+ if (rb && !_mesa_base_format_has_channel(rb->_BaseFormat, GL_TEXTURE_ALPHA_TYPE))
+ {
+ srcRGB = brw_fix_xRGB_alpha(srcRGB);
+ srcA = brw_fix_xRGB_alpha(srcA);
+ dstRGB = brw_fix_xRGB_alpha(dstRGB);
+ dstA = brw_fix_xRGB_alpha(dstA);
+ }
+
+ blend[b].blend0.dest_blend_factor = brw_translate_blend_factor(dstRGB);
+ blend[b].blend0.source_blend_factor = brw_translate_blend_factor(srcRGB);
+ blend[b].blend0.blend_func = brw_translate_blend_equation(eqRGB);
+
+ blend[b].blend0.ia_dest_blend_factor = brw_translate_blend_factor(dstA);
+ blend[b].blend0.ia_source_blend_factor = brw_translate_blend_factor(srcA);
+ blend[b].blend0.ia_blend_func = brw_translate_blend_equation(eqA);
+
+ blend[b].blend0.blend_enable = 1;
+ blend[b].blend0.ia_blend_enable = (srcA != srcRGB ||
+ dstA != dstRGB ||
+ eqA != eqRGB);
+ }
- /* _NEW_COLOR */
- key->dither = ctx->Color.DitherFlag;
-}
+ /* See section 8.1.6 "Pre-Blend Color Clamping" of the
+ * SandyBridge PRM Volume 2 Part 1 for HW requirements.
+ *
+ * We do our ARB_color_buffer_float CLAMP_FRAGMENT_COLOR
+ * clamping in the fragment shader. For its clamping of
+ * blending, the spec says:
+ *
+ * "RESOLVED: For fixed-point color buffers, the inputs and
+ * the result of the blending equation are clamped. For
+ * floating-point color buffers, no clamping occurs."
+ *
+ * So, generally, we want clamping to the render target's range.
+ * And, good news, the hardware tables for both pre- and
+ * post-blend color clamping are either ignored, or any are
+ * allowed, or clamping is required but RT range clamping is a
+ * valid option.
+ */
+ blend[b].blend1.pre_blend_clamp_enable = 1;
+ blend[b].blend1.post_blend_clamp_enable = 1;
+ blend[b].blend1.clamp_range = BRW_RENDERTARGET_CLAMPRANGE_FORMAT;
+
+ /* _NEW_COLOR */
+ if (ctx->Color.AlphaEnabled && !integer) {
+ blend[b].blend1.alpha_test_enable = 1;
+ blend[b].blend1.alpha_test_func =
+ intel_translate_compare_func(ctx->Color.AlphaFunc);
-/**
- * Creates the state cache entry for the given CC unit key.
- */
-static drm_intel_bo *
-blend_state_create_from_key(struct brw_context *brw,
- struct gen6_blend_state_key *key)
-{
- struct gen6_blend_state blend;
- drm_intel_bo *bo;
-
- memset(&blend, 0, sizeof(blend));
-
- if (key->logic_op != GL_COPY) {
- blend.blend1.logic_op_enable = 1;
- blend.blend1.logic_op_func = intel_translate_logic_op(key->logic_op);
- } else if (key->color_blend) {
- GLenum eqRGB = key->blend_eq_rgb;
- GLenum eqA = key->blend_eq_a;
- GLenum srcRGB = key->blend_src_rgb;
- GLenum dstRGB = key->blend_dst_rgb;
- GLenum srcA = key->blend_src_a;
- GLenum dstA = key->blend_dst_a;
-
- if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
- srcRGB = dstRGB = GL_ONE;
}
- if (eqA == GL_MIN || eqA == GL_MAX) {
- srcA = dstA = GL_ONE;
+ /* _NEW_COLOR */
+ if (ctx->Color.DitherFlag && !integer) {
+ blend[b].blend1.dither_enable = 1;
+ blend[b].blend1.y_dither_offset = 0;
+ blend[b].blend1.x_dither_offset = 0;
}
- blend.blend0.dest_blend_factor = brw_translate_blend_factor(dstRGB);
- blend.blend0.source_blend_factor = brw_translate_blend_factor(srcRGB);
- blend.blend0.blend_func = brw_translate_blend_equation(eqRGB);
-
- blend.blend0.ia_dest_blend_factor = brw_translate_blend_factor(dstA);
- blend.blend0.ia_source_blend_factor = brw_translate_blend_factor(srcA);
- blend.blend0.ia_blend_func = brw_translate_blend_equation(eqA);
-
- blend.blend0.blend_enable = 1;
- blend.blend0.ia_blend_enable = (srcA != srcRGB ||
- dstA != dstRGB ||
- eqA != eqRGB);
- }
-
- if (key->alpha_enabled) {
- blend.blend1.alpha_test_enable = 1;
- blend.blend1.alpha_test_func = intel_translate_compare_func(key->alpha_func);
-
+ blend[b].blend1.write_disable_r = !ctx->Color.ColorMask[b][0];
+ blend[b].blend1.write_disable_g = !ctx->Color.ColorMask[b][1];
+ blend[b].blend1.write_disable_b = !ctx->Color.ColorMask[b][2];
+ blend[b].blend1.write_disable_a = !ctx->Color.ColorMask[b][3];
+
+ /* OpenGL specification 3.3 (page 196), section 4.1.3 says:
+ * "If drawbuffer zero is not NONE and the buffer it references has an
+ * integer format, the SAMPLE_ALPHA_TO_COVERAGE and SAMPLE_ALPHA_TO_ONE
+ * operations are skipped."
+ */
+ if(!is_buffer_zero_integer_format) {
+ /* _NEW_MULTISAMPLE */
+ blend[b].blend1.alpha_to_coverage =
+ ctx->Multisample._Enabled && ctx->Multisample.SampleAlphaToCoverage;
+
+ /* From SandyBridge PRM, volume 2 Part 1, section 8.2.3, BLEND_STATE:
+ * DWord 1, Bit 30 (AlphaToOne Enable):
+ * "If Dual Source Blending is enabled, this bit must be disabled"
+ */
+ WARN_ONCE(ctx->Color.Blend[b]._UsesDualSrc &&
+ ctx->Multisample._Enabled &&
+ ctx->Multisample.SampleAlphaToOne,
+ "HW workaround: disabling alpha to one with dual src "
+ "blending\n");
+ if (ctx->Color.Blend[b]._UsesDualSrc)
+ blend[b].blend1.alpha_to_one = false;
+ else
+ blend[b].blend1.alpha_to_one =
+ ctx->Multisample._Enabled && ctx->Multisample.SampleAlphaToOne;
+
+ blend[b].blend1.alpha_to_coverage_dither = (brw->gen >= 7);
+ }
+ else {
+ blend[b].blend1.alpha_to_coverage = false;
+ blend[b].blend1.alpha_to_one = false;
+ }
}
- if (key->dither) {
- blend.blend1.dither_enable = 1;
- blend.blend1.y_dither_offset = 0;
- blend.blend1.x_dither_offset = 0;
+ /* Point the GPU at the new indirect state. */
+ if (brw->gen == 6) {
+ BEGIN_BATCH(4);
+ OUT_BATCH(_3DSTATE_CC_STATE_POINTERS << 16 | (4 - 2));
+ OUT_BATCH(brw->cc.blend_state_offset | 1);
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ ADVANCE_BATCH();
+ } else {
+ BEGIN_BATCH(2);
+ OUT_BATCH(_3DSTATE_BLEND_STATE_POINTERS << 16 | (2 - 2));
+ OUT_BATCH(brw->cc.blend_state_offset | 1);
+ ADVANCE_BATCH();
}
-
- bo = brw_upload_cache(&brw->cache, BRW_BLEND_STATE,
- key, sizeof(*key),
- NULL, 0,
- &blend, sizeof(blend));
-
- return bo;
-}
-
-static void
-prepare_blend_state(struct brw_context *brw)
-{
- struct gen6_blend_state_key key;
-
- blend_state_populate_key(brw, &key);
-
- drm_intel_bo_unreference(brw->cc.blend_state_bo);
- brw->cc.blend_state_bo = brw_search_cache(&brw->cache, BRW_BLEND_STATE,
- &key, sizeof(key),
- NULL, 0,
- NULL);
-
- if (brw->cc.blend_state_bo == NULL)
- brw->cc.blend_state_bo = blend_state_create_from_key(brw, &key);
}
const struct brw_tracked_state gen6_blend_state = {
.dirty = {
- .mesa = _NEW_COLOR,
- .brw = 0,
- .cache = 0,
+ .mesa = _NEW_BUFFERS |
+ _NEW_COLOR |
+ _NEW_MULTISAMPLE,
+ .brw = BRW_NEW_BATCH |
+ BRW_NEW_STATE_BASE_ADDRESS,
},
- .prepare = prepare_blend_state,
-};
-
-struct gen6_color_calc_state_key {
- GLubyte blend_constant_color[4];
- GLclampf alpha_ref;
- GLubyte stencil_ref[2];
+ .emit = gen6_upload_blend_state,
};
static void
-color_calc_state_populate_key(struct brw_context *brw,
- struct gen6_color_calc_state_key *key)
+gen6_upload_color_calc_state(struct brw_context *brw)
{
- GLcontext *ctx = &brw->intel.ctx;
-
- memset(key, 0, sizeof(*key));
+ struct gl_context *ctx = &brw->ctx;
+ struct gen6_color_calc_state *cc;
- /* _NEW_STENCIL */
- if (ctx->Stencil._Enabled) {
- const unsigned back = ctx->Stencil._BackFace;
+ cc = brw_state_batch(brw, AUB_TRACE_CC_STATE,
+ sizeof(*cc), 64, &brw->cc.state_offset);
+ memset(cc, 0, sizeof(*cc));
- key->stencil_ref[0] = ctx->Stencil.Ref[0];
- if (ctx->Stencil._TestTwoSide)
- key->stencil_ref[1] = ctx->Stencil.Ref[back];
+ /* _NEW_COLOR */
+ cc->cc0.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8;
+ UNCLAMPED_FLOAT_TO_UBYTE(cc->cc1.alpha_ref_fi.ui, ctx->Color.AlphaRef);
+
+ if (brw->gen < 9) {
+ /* _NEW_STENCIL */
+ cc->cc0.stencil_ref = _mesa_get_stencil_ref(ctx, 0);
+ cc->cc0.bf_stencil_ref =
+ _mesa_get_stencil_ref(ctx, ctx->Stencil._BackFace);
}
/* _NEW_COLOR */
- if (ctx->Color.AlphaEnabled)
- key->alpha_ref = ctx->Color.AlphaRef;
-
- key->blend_constant_color[0] = ctx->Color.BlendColor[0];
- key->blend_constant_color[1] = ctx->Color.BlendColor[1];
- key->blend_constant_color[2] = ctx->Color.BlendColor[2];
- key->blend_constant_color[3] = ctx->Color.BlendColor[3];
-}
-
-/**
- * Creates the state cache entry for the given CC state key.
- */
-static drm_intel_bo *
-color_calc_state_create_from_key(struct brw_context *brw,
- struct gen6_color_calc_state_key *key)
-{
- struct gen6_color_calc_state cc;
- drm_intel_bo *bo;
-
- memset(&cc, 0, sizeof(cc));
-
- cc.cc0.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8;
- UNCLAMPED_FLOAT_TO_UBYTE(cc.cc1.alpha_ref_fi.ui, key->alpha_ref);
-
- cc.cc0.stencil_ref = key->stencil_ref[0];
- cc.cc0.bf_stencil_ref = key->stencil_ref[1];
-
- cc.constant_r = key->blend_constant_color[0];
- cc.constant_g = key->blend_constant_color[1];
- cc.constant_b = key->blend_constant_color[2];
- cc.constant_a = key->blend_constant_color[3];
-
- bo = brw_upload_cache(&brw->cache, BRW_COLOR_CALC_STATE,
- key, sizeof(*key),
- NULL, 0,
- &cc, sizeof(cc));
-
- return bo;
-}
-
-static void
-prepare_color_calc_state(struct brw_context *brw)
-{
- struct gen6_color_calc_state_key key;
-
- color_calc_state_populate_key(brw, &key);
-
- drm_intel_bo_unreference(brw->cc.state_bo);
- brw->cc.state_bo = brw_search_cache(&brw->cache, BRW_COLOR_CALC_STATE,
- &key, sizeof(key),
- NULL, 0,
- NULL);
-
- if (brw->cc.state_bo == NULL)
- brw->cc.state_bo = color_calc_state_create_from_key(brw, &key);
+ cc->constant_r = ctx->Color.BlendColorUnclamped[0];
+ cc->constant_g = ctx->Color.BlendColorUnclamped[1];
+ cc->constant_b = ctx->Color.BlendColorUnclamped[2];
+ cc->constant_a = ctx->Color.BlendColorUnclamped[3];
+
+ /* Point the GPU at the new indirect state. */
+ if (brw->gen == 6) {
+ BEGIN_BATCH(4);
+ OUT_BATCH(_3DSTATE_CC_STATE_POINTERS << 16 | (4 - 2));
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ OUT_BATCH(brw->cc.state_offset | 1);
+ ADVANCE_BATCH();
+ } else {
+ BEGIN_BATCH(2);
+ OUT_BATCH(_3DSTATE_CC_STATE_POINTERS << 16 | (2 - 2));
+ OUT_BATCH(brw->cc.state_offset | 1);
+ ADVANCE_BATCH();
+ }
}
const struct brw_tracked_state gen6_color_calc_state = {
.dirty = {
- .mesa = _NEW_COLOR,
- .brw = 0,
- .cache = 0,
- },
- .prepare = prepare_color_calc_state,
-};
-
-static void upload_cc_state_pointers(struct brw_context *brw)
-{
- struct intel_context *intel = &brw->intel;
-
- BEGIN_BATCH(4);
- OUT_BATCH(CMD_3D_CC_STATE_POINTERS << 16 | (4 - 2));
- OUT_RELOC(brw->cc.state_bo, I915_GEM_DOMAIN_INSTRUCTION, 0, 1);
- OUT_RELOC(brw->cc.blend_state_bo, I915_GEM_DOMAIN_INSTRUCTION, 0, 1);
- OUT_RELOC(brw->cc.depth_stencil_state_bo, I915_GEM_DOMAIN_INSTRUCTION, 0, 1);
- ADVANCE_BATCH();
-
- intel_batchbuffer_emit_mi_flush(intel->batch);
-}
-
-
-static void prepare_cc_state_pointers(struct brw_context *brw)
-{
- brw_add_validated_bo(brw, brw->cc.state_bo);
- brw_add_validated_bo(brw, brw->cc.blend_state_bo);
- brw_add_validated_bo(brw, brw->cc.depth_stencil_state_bo);
-}
-
-const struct brw_tracked_state gen6_cc_state_pointers = {
- .dirty = {
- .mesa = 0,
- .brw = BRW_NEW_BATCH,
- .cache = (CACHE_NEW_BLEND_STATE |
- CACHE_NEW_COLOR_CALC_STATE |
- CACHE_NEW_DEPTH_STENCIL_STATE)
+ .mesa = _NEW_COLOR |
+ _NEW_STENCIL,
+ .brw = BRW_NEW_BATCH |
+ BRW_NEW_STATE_BASE_ADDRESS,
},
- .prepare = prepare_cc_state_pointers,
- .emit = upload_cc_state_pointers,
+ .emit = gen6_upload_color_calc_state,
};
projects / mesa.git / blobdiff