Implement path cover with nv_path_rendering

src/gpu/GrGpu.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 "GrGpu.h"
@@ skipping 180 matching lines @@
     this->handleDirtyContext();
     return this->onCreateVertexBuffer(size, dynamic);
 }
 
 GrIndexBuffer* GrGpu::createIndexBuffer(uint32_t size, bool dynamic) {
     this->handleDirtyContext();
     return this->onCreateIndexBuffer(size, dynamic);
 }
 
 GrPath* GrGpu::createPath(const SkPath& path) {
-    SkASSERT(this->caps()->pathStencilingSupport());
+    SkASSERT(this->caps()->pathRenderingSupport());
     this->handleDirtyContext();
     return this->onCreatePath(path);
 }
 
 void GrGpu::clear(const SkIRect* rect,
                   GrColor color,
                   GrRenderTarget* renderTarget) {
     GrDrawState::AutoRenderTargetRestore art;
     if (NULL != renderTarget) {
         art.set(this->drawState(), renderTarget);
@@ skipping 28 matching lines @@
     return this->onWriteTexturePixels(texture, left, top, width, height,
                                       config, buffer, rowBytes);
 }
 
 void GrGpu::resolveRenderTarget(GrRenderTarget* target) {
     SkASSERT(target);
     this->handleDirtyContext();
     this->onResolveRenderTarget(target);
 }
 
+namespace {
+
+const GrStencilSettings& winding_path_stencil_settings() {
+    GR_STATIC_CONST_SAME_STENCIL_STRUCT(gSettings,
+        kIncClamp_StencilOp,
+        kIncClamp_StencilOp,
+        kAlwaysIfInClip_StencilFunc,
+        0xFFFF, 0xFFFF, 0xFFFF);
+    return *GR_CONST_STENCIL_SETTINGS_PTR_FROM_STRUCT_PTR(&gSettings);
+}
+const GrStencilSettings& even_odd_path_stencil_settings() {
+    GR_STATIC_CONST_SAME_STENCIL_STRUCT(gSettings,
+        kInvert_StencilOp,
+        kInvert_StencilOp,
+        kAlwaysIfInClip_StencilFunc,
+        0xFFFF, 0xFFFF, 0xFFFF);
+    return *GR_CONST_STENCIL_SETTINGS_PTR_FROM_STRUCT_PTR(&gSettings);
+}
+
+}
+
+void GrGpu::getPathStencilSettingsForFillType(SkPath::FillType fill, GrStencilSettings* outStencilSettings) {
+
+    switch (fill) {
+        default:
+            GrCrash("Unexpected path fill.");
+            /* fallthrough */;
+        case SkPath::kWinding_FillType:
+        case SkPath::kInverseWinding_FillType:
+            *outStencilSettings = winding_path_stencil_settings();
+            break;
+        case SkPath::kEvenOdd_FillType:
+        case SkPath::kInverseEvenOdd_FillType:
+            *outStencilSettings = even_odd_path_stencil_settings();
+            break;
+    }
+    fClipMaskManager.adjustPathStencilParams(outStencilSettings);
+}
+
 
 ////////////////////////////////////////////////////////////////////////////////
 
 static const int MAX_QUADS = 1 << 12; // max possible: (1 << 14) - 1;
 
 GR_STATIC_ASSERT(4 * MAX_QUADS <= 65535);
 
 static inline void fill_indices(uint16_t* indices, int quadCount) {
     for (int i = 0; i < quadCount; ++i) {
         indices[6 * i + 0] = 4 * i + 0;
@@ skipping 82 matching lines @@
                                       info.getDstCopy(),
                                       &are)) {
         return;
     }
     this->onGpuDraw(info);
 }
 
 void GrGpu::onStencilPath(const GrPath* path, const SkStrokeRec&, SkPath::FillType fill) {
     this->handleDirtyContext();
 
-    // TODO: make this more efficient (don't copy and copy back)
-    GrAutoTRestore<GrStencilSettings> asr(this->drawState()->stencil());
-
-    this->setStencilPathSettings(*path, fill, this->drawState()->stencil());
     GrDrawState::AutoRestoreEffects are;
     if (!this->setupClipAndFlushState(kStencilPath_DrawType, NULL, &are)) {
         return;
     }
 
     this->onGpuStencilPath(path, fill);
 }
 
+void GrGpu::onFillPath(const GrPath* path, const SkStrokeRec& stroke, SkPath::FillType fill) {
+    this->handleDirtyContext();
+
+    drawState()->setDefaultVertexAttribs();
+
+    GrDrawState::AutoRestoreEffects are;
+    // TODO: Some blending effects require destination texture, see onDraw
+    if (!this->setupClipAndFlushState(kFillPath_DrawType, NULL, &are)) {
+        return;
+    }
+
+    this->onGpuFillPath(path, fill);
+}
+
 void GrGpu::finalizeReservedVertices() {
     SkASSERT(NULL != fVertexPool);
     fVertexPool->unlock();
 }
 
 void GrGpu::finalizeReservedIndices() {
     SkASSERT(NULL != fIndexPool);
     fIndexPool->unlock();
 }
 
@@ skipping 117 matching lines @@
 }
 
 void GrGpu::releaseIndexArray() {
     // if index source was array, we stowed data in the pool
     const GeometrySrcState& geoSrc = this->getGeomSrc();
     SkASSERT(kArray_GeometrySrcType == geoSrc.fIndexSrc);
     size_t bytes = geoSrc.fIndexCount * sizeof(uint16_t);
     fIndexPool->putBack(bytes);
     --fIndexPoolUseCnt;
 }