Separate user and raw stencil settings

src/gpu/GrDrawTarget.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrDrawTarget.h"
 
 #include "GrAuditTrail.h"
 #include "GrCaps.h"
 #include "GrGpu.h"
 #include "GrPath.h"
 #include "GrPipeline.h"
 #include "GrMemoryPool.h"
 #include "GrRenderTarget.h"
 #include "GrResourceProvider.h"
 #include "GrRenderTargetPriv.h"
+#include "GrStencilAttachment.h"
 #include "GrSurfacePriv.h"
 #include "GrTexture.h"
 #include "gl/GrGLRenderTarget.h"
 
 #include "SkStrokeRec.h"
 
 #include "batches/GrClearBatch.h"
 #include "batches/GrCopySurfaceBatch.h"
 #include "batches/GrDiscardBatch.h"
 #include "batches/GrDrawBatch.h"
@@ skipping 199 matching lines @@
 }
 
 void GrDrawTarget::reset() {
     fBatches.reset();
 }
 
 void GrDrawTarget::drawBatch(const GrPipelineBuilder& pipelineBuilder,
                              GrDrawBatch* batch,
                              const SkIRect* scissorRect) {
     // Setup clip
-    GrPipelineBuilder::AutoRestoreStencil ars;
     GrAppliedClip clip;
 
     if (scissorRect) {
         SkASSERT(GrClip::kWideOpen_ClipType == pipelineBuilder.clip().clipType());
-        if (!fClipMaskManager->setupScissorClip(pipelineBuilder, &ars, *scissorRect,
+        if (!fClipMaskManager->setupScissorClip(pipelineBuilder, *scissorRect,
                                                 &batch->bounds(), &clip)) {
             return;
         }
     } else {
-        if (!fClipMaskManager->setupClipping(pipelineBuilder, &ars, &batch->bounds(), &clip)) {
+        if (!fClipMaskManager->setupClipping(pipelineBuilder, &batch->bounds(), &clip)) {
             return;
         }
     }
 
     GrPipelineBuilder::AutoRestoreFragmentProcessorState arfps;
     if (clip.clipCoverageFragmentProcessor()) {
         arfps.set(&pipelineBuilder);
         arfps.addCoverageFragmentProcessor(clip.clipCoverageFragmentProcessor());
     }
 
     GrPipeline::CreateArgs args;
-    if (!this->installPipelineInDrawBatch(&pipelineBuilder, &clip.scissorState(), batch)) {
+    if (!this->installPipelineInDrawBatch(&pipelineBuilder, &clip.scissorState(),
+                                          clip.hasStencilClip(), batch)) {
         return;
     }
 
 #ifdef ENABLE_MDB
     SkASSERT(fRenderTarget);
     batch->pipeline()->addDependenciesTo(fRenderTarget);
 #endif
 
     this->recordBatch(batch);
 }
 
-void GrDrawTarget::getPathStencilSettingsForFilltype(GrPathRendering::FillType fill,
-                                                     const GrStencilAttachment* sb,
-                                                     GrStencilSettings* outStencilSettings) {
-    static constexpr GrStencilSettings kWindingStencilSettings(
-        kIncClamp_StencilOp,
-        kIncClamp_StencilOp,
-        kAlwaysIfInClip_StencilFunc,
-        0xFFFF, 0xFFFF, 0xFFFF
+inline static const GrUserStencilSettings& get_path_stencil_settings_for_fill(
+        GrPathRendering::FillType fill) {
+    static constexpr GrUserStencilSettings kWindingStencilSettings(
+        GrUserStencilSettings::StaticInit<
+            0xffff,
+            GrUserStencilTest::kAlwaysIfInClip,
+            0xffff,
+            GrUserStencilOp::kIncMaybeClamp, // TODO: Use wrap ops for NVPR.
+            GrUserStencilOp::kIncMaybeClamp,
+            0xffff>()
     );
 
-    static constexpr GrStencilSettings kEvenODdStencilSettings(
-        kInvert_StencilOp,
-        kInvert_StencilOp,
-        kAlwaysIfInClip_StencilFunc,
-        0xFFFF, 0xFFFF, 0xFFFF
+    static constexpr GrUserStencilSettings kEvenOddStencilSettings(
+        GrUserStencilSettings::StaticInit<
+            0xffff,
+            GrUserStencilTest::kAlwaysIfInClip,
+            0xffff,
+            GrUserStencilOp::kInvert,
+            GrUserStencilOp::kInvert,
+            0xffff>()
     );
 
     switch (fill) {
         default:
             SkFAIL("Unexpected path fill.");
         case GrPathRendering::kWinding_FillType:
-            *outStencilSettings = kWindingStencilSettings;
-            break;
+            return kWindingStencilSettings;
         case GrPathRendering::kEvenOdd_FillType:
-            *outStencilSettings = kEvenODdStencilSettings;
-            break;
+            return kEvenOddStencilSettings;
     }
-    fClipMaskManager->adjustPathStencilParams(sb, outStencilSettings);
 }
 
 void GrDrawTarget::stencilPath(const GrPipelineBuilder& pipelineBuilder,
                                const SkMatrix& viewMatrix,
                                const GrPath* path,
                                GrPathRendering::FillType fill) {
     // TODO: extract portions of checkDraw that are relevant to path stenciling.
     SkASSERT(path);
     SkASSERT(this->caps()->shaderCaps()->pathRenderingSupport());
 
     // Setup clip
-    GrPipelineBuilder::AutoRestoreStencil ars;
     GrAppliedClip clip;
-    if (!fClipMaskManager->setupClipping(pipelineBuilder, &ars, nullptr, &clip)) {
+    if (!fClipMaskManager->setupClipping(pipelineBuilder, nullptr, &clip)) {
         return;
     }
 
     GrPipelineBuilder::AutoRestoreFragmentProcessorState arfps;
     if (clip.clipCoverageFragmentProcessor()) {
         arfps.set(&pipelineBuilder);
         arfps.addCoverageFragmentProcessor(clip.clipCoverageFragmentProcessor());
     }
 
-    // set stencil settings for path
-    GrStencilSettings stencilSettings;
     GrRenderTarget* rt = pipelineBuilder.getRenderTarget();
-    GrStencilAttachment* sb = fResourceProvider->attachStencilAttachment(rt);
-    this->getPathStencilSettingsForFilltype(fill, sb, &stencilSettings);
+    GrStencilAttachment* stencilAttachment = fResourceProvider->attachStencilAttachment(rt);
 
     GrBatch* batch = GrStencilPathBatch::Create(viewMatrix,
                                                 pipelineBuilder.isHWAntialias(),
-                                                stencilSettings, clip.scissorState(),
+                                                get_path_stencil_settings_for_fill(fill),
+                                                clip.hasStencilClip(),
+                                                stencilAttachment->bits(),
+                                                clip.scissorState(),
                                                 pipelineBuilder.getRenderTarget(),
                                                 path);
     this->recordBatch(batch);
     batch->unref();
 }
 
 void GrDrawTarget::drawPathBatch(const GrPipelineBuilder& pipelineBuilder,
                                  GrDrawPathBatchBase* batch) {
     // This looks like drawBatch() but there is an added wrinkle that stencil settings get inserted
     // after setting up clipping but before onDrawBatch(). TODO: Figure out a better model for
     // handling stencil settings WRT interactions between pipeline(builder), clipmaskmanager, and
     // batches.
     SkASSERT(this->caps()->shaderCaps()->pathRenderingSupport());
 
-    GrPipelineBuilder::AutoRestoreStencil ars;
     GrAppliedClip clip;
-    if (!fClipMaskManager->setupClipping(pipelineBuilder, &ars, &batch->bounds(), &clip)) {
+    if (!fClipMaskManager->setupClipping(pipelineBuilder, &batch->bounds(), &clip)) {
         return;
     }
 
     GrPipelineBuilder::AutoRestoreFragmentProcessorState arfps;
     if (clip.clipCoverageFragmentProcessor()) {
         arfps.set(&pipelineBuilder);
         arfps.addCoverageFragmentProcessor(clip.clipCoverageFragmentProcessor());
     }
 
     // Ensure the render target has a stencil buffer and get the stencil settings.
-    GrStencilSettings stencilSettings;
     GrRenderTarget* rt = pipelineBuilder.getRenderTarget();
     GrStencilAttachment* sb = fResourceProvider->attachStencilAttachment(rt);
-    this->getPathStencilSettingsForFilltype(batch->fillType(), sb, &stencilSettings);
-    batch->setStencilSettings(stencilSettings);
+    // TODO: Move this step into GrDrawPathPath::onPrepare().
+    batch->setStencilSettings(get_path_stencil_settings_for_fill(batch->fillType()),
+                              clip.hasStencilClip(),
+                              sb->bits());
 
     GrPipeline::CreateArgs args;
-    if (!this->installPipelineInDrawBatch(&pipelineBuilder, &clip.scissorState(), batch)) {
+    if (!this->installPipelineInDrawBatch(&pipelineBuilder, &clip.scissorState(),
+                                          clip.hasStencilClip(), batch)) {
         return;
     }
 
     this->recordBatch(batch);
 }
 
 void GrDrawTarget::clear(const SkIRect* rect,
                          GrColor color,
                          bool canIgnoreRect,
                          GrRenderTarget* renderTarget) {
@@ skipping 163 matching lines @@
                 break;
             }
         }
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 bool GrDrawTarget::installPipelineInDrawBatch(const GrPipelineBuilder* pipelineBuilder,
                                               const GrScissorState* scissor,
+                                              bool hasStencilClip,
                                               GrDrawBatch* batch) {
     GrPipeline::CreateArgs args;
     args.fPipelineBuilder = pipelineBuilder;
     args.fCaps = this->caps();
     args.fScissor = scissor;
+    if (pipelineBuilder->hasUserStencilSettings() || hasStencilClip) {
+        GrRenderTarget* rt = pipelineBuilder->getRenderTarget();
+        GrStencilAttachment* sb = fResourceProvider->attachStencilAttachment(rt);
+        args.fNumStencilBits = sb->bits();
+    } else {
+        args.fNumStencilBits = 0;
+    }
+    args.fHasStencilClip = hasStencilClip;
     batch->getPipelineOptimizations(&args.fOpts);
     GrScissorState finalScissor;
     if (args.fOpts.fOverrides.fUsePLSDstRead) {
         GrRenderTarget* rt = pipelineBuilder->getRenderTarget();
         GrGLIRect viewport;
         viewport.fLeft = 0;
         viewport.fBottom = 0;
         viewport.fWidth = rt->width();
         viewport.fHeight = rt->height();
         SkIRect ibounds;
@@ skipping 28 matching lines @@
     }
 
     return true;
 }
 
 void GrDrawTarget::clearStencilClip(const SkIRect& rect, bool insideClip, GrRenderTarget* rt) {
     GrBatch* batch = new GrClearStencilClipBatch(rect, insideClip, rt);
     this->recordBatch(batch);
     batch->unref();
 }