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 {

[bsalomon, 2013/10/08 14:05:08]

We were using anonymous namespaces in Gr code, but now we've adopted the style
of the rest of the Sk code and are using static instead (and slowly replacing
existing instances of anonymous namespace).

[Kimmo Kinnunen, 2013/10/09 07:07:01]

Done.

+
+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,
+                       const GrDeviceCoordTexture* dstCopy) {
+    this->handleDirtyContext();
+
+    drawState()->setDefaultVertexAttribs();
+
+    GrDrawState::AutoRestoreEffects are;
+    if (!this->setupClipAndFlushState(kFillPath_DrawType, dstCopy, &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;
 }