Wrap NV_path_rendering API with GrGLPathRendering

src/gpu/gl/GrGLPathRendering.cpp

Index: src/gpu/gl/GrGLPathRendering.cpp
diff --git a/src/gpu/gl/GrGLPathRendering.cpp b/src/gpu/gl/GrGLPathRendering.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..249d98139ad65b9d888e161ba32c7f6281a52046
--- /dev/null
+++ b/src/gpu/gl/GrGLPathRendering.cpp
@@ -0,0 +1,281 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "gl/GrGLPathRendering.h"
+#include "gl/GrGLInterface.h"
+#include "gl/GrGLNameAllocator.h"
+#include "gl/GrGLUtil.h"
+
+#define GL_CALL(X) GR_GL_CALL(fGLInterface.get(), X)
+#define GL_CALL_RET(RET, X) GR_GL_CALL_RET(fGLInterface.get(), RET, X)
+
+class GrGLPathRenderingV12 : public GrGLPathRendering {
+public:
+    GrGLPathRenderingV12(const GrGLInterface* glInterface)
+        : GrGLPathRendering(glInterface) {
+    }
+
+    virtual GrGLvoid stencilThenCoverFillPath(GrGLuint path, GrGLenum fillMode,
+                                              GrGLuint mask, GrGLenum coverMode) SK_OVERRIDE;
+    virtual GrGLvoid stencilThenCoverStrokePath(GrGLuint path, GrGLint reference,
+                                                GrGLuint mask, GrGLenum coverMode) SK_OVERRIDE;
+    virtual GrGLvoid stencilThenCoverFillPathInstanced(
+                         GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths,
+                         GrGLuint pathBase, GrGLenum fillMode, GrGLuint mask, GrGLenum coverMode,
+                         GrGLenum transformType, const GrGLfloat *transformValues) SK_OVERRIDE;
+    virtual GrGLvoid stencilThenCoverStrokePathInstanced(
+                         GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths,
+                         GrGLuint pathBase, GrGLint reference, GrGLuint mask, GrGLenum coverMode,
+                         GrGLenum transformType, const GrGLfloat *transformValues) SK_OVERRIDE;
+};
+
+class GrGLPathRenderingV13 : public GrGLPathRenderingV12 {
+public:
+    GrGLPathRenderingV13(const GrGLInterface* glInterface)
+        : GrGLPathRenderingV12(glInterface) {
+        fCaps.fragmentInputGenSupport = true;
+    }
+
+    virtual GrGLvoid programPathFragmentInputGen(GrGLuint program, GrGLint location,
+                                                 GrGLenum genMode, GrGLint components,
+                                                 const GrGLfloat *coeffs) SK_OVERRIDE;
+};
+
+
+GrGLPathRendering* GrGLPathRendering::Create(const GrGLInterface* glInterface) {
+    if (NULL == glInterface->fFunctions.fStencilThenCoverFillPath ||
+        NULL == glInterface->fFunctions.fStencilThenCoverStrokePath ||
+        NULL == glInterface->fFunctions.fStencilThenCoverFillPathInstanced ||
+        NULL == glInterface->fFunctions.fStencilThenCoverStrokePathInstanced) {
+        return new GrGLPathRendering(glInterface);
+    }
+
+    if (NULL == glInterface->fFunctions.fProgramPathFragmentInputGen) {
+        return new GrGLPathRenderingV12(glInterface);
+    }
+
+    return new GrGLPathRenderingV13(glInterface);
+}
+
+GrGLPathRendering::GrGLPathRendering(const GrGLInterface* glInterface)
+    : fGLInterface(SkRef(glInterface)) {
+    memset(&fCaps, 0, sizeof(fCaps));
+}
+
+GrGLPathRendering::~GrGLPathRendering() {
+}
+
+void GrGLPathRendering::abandonGpuResources() {
+    fPathNameAllocator.reset(NULL);
+}
+
+
+// NV_path_rendering
+GrGLuint GrGLPathRendering::genPaths(GrGLsizei range) {
+    if (range > 1) {
+        GrGLuint name;
+        GL_CALL_RET(name, GenPaths(range));
+        return name;
+    }
+
+    if (NULL == fPathNameAllocator.get()) {
+        static const int range = 65536;
+        GrGLuint firstName;
+        GL_CALL_RET(firstName, GenPaths(range));
+        fPathNameAllocator.reset(SkNEW_ARGS(GrGLNameAllocator, (firstName, firstName + range)));
+    }
+
+    // When allocating names one at a time, pull from a client-side pool of
+    // available names in order to save a round trip to the GL server.
+    GrGLuint name = fPathNameAllocator->allocateName();
+
+    if (0 == name) {
+        // Our reserved path names are all in use. Fall back on GenPaths.
+        GL_CALL_RET(name, GenPaths(1));
+    }
+
+    return name;
+}
+
+GrGLvoid GrGLPathRendering::deletePaths(GrGLuint path, GrGLsizei range) {
+    if (range > 1) {
+        // It is not supported to delete names in ranges that were allocated
+        // individually using GrGLPathNameAllocator.
+        SkASSERT(NULL == fPathNameAllocator.get() ||
+                 path + range <= fPathNameAllocator->firstName() ||
+                 path >= fPathNameAllocator->endName());
+        GL_CALL(DeletePaths(path, range));
+        return;
+    }
+
+    if (NULL == fPathNameAllocator.get() ||
+        path < fPathNameAllocator->firstName() ||
+        path >= fPathNameAllocator->endName()) {
+        // If we aren't inside fPathNameAllocator's range then this name was
+        // generated by the GenPaths fallback (or else was never allocated).
+        GL_CALL(DeletePaths(path, 1));
+        return;
+    }
+
+    // Make the path empty to save memory, but don't free the name in the driver.
+    GL_CALL(PathCommands(path, 0, NULL, 0, GR_GL_FLOAT, NULL));
+    fPathNameAllocator->free(path);
+}
+
+GrGLvoid GrGLPathRendering::pathCommands(GrGLuint path, GrGLsizei numCommands,
+                                         const GrGLubyte *commands, GrGLsizei numCoords,
+                                         GrGLenum coordType, const GrGLvoid *coords) {
+    GL_CALL(PathCommands(path, numCommands, commands, numCoords, coordType, coords));
+}
+
+GrGLvoid GrGLPathRendering::pathCoords(GrGLuint path, GrGLsizei numCoords,
+                                       GrGLenum coordType, const GrGLvoid *coords) {
+    GL_CALL(PathCoords(path, numCoords, coordType, coords));
+}
+
+GrGLvoid GrGLPathRendering::pathParameteri(GrGLuint path, GrGLenum pname, GrGLint value) {
+    GL_CALL(PathParameteri(path, pname, value));
+}
+
+GrGLvoid GrGLPathRendering::pathParameterf(GrGLuint path, GrGLenum pname, GrGLfloat value) {
+    GL_CALL(PathParameterf(path, pname, value));
+}
+
+GrGLboolean GrGLPathRendering::isPath(GrGLuint path) {
+    GrGLboolean ret;
+    GL_CALL_RET(ret, IsPath(path));
+    return ret;
+}
+
+GrGLvoid GrGLPathRendering::pathStencilFunc(GrGLenum func, GrGLint ref, GrGLuint mask) {
+    GL_CALL(PathStencilFunc(func, ref, mask));
+}
+
+GrGLvoid GrGLPathRendering::stencilFillPath(GrGLuint path, GrGLenum fillMode, GrGLuint mask) {
+    GL_CALL(StencilFillPath(path, fillMode, mask));
+}
+
+GrGLvoid GrGLPathRendering::stencilStrokePath(GrGLuint path, GrGLint reference, GrGLuint mask) {
+    GL_CALL(StencilStrokePath(path, reference, mask));
+}
+
+GrGLvoid GrGLPathRendering::stencilFillPathInstanced(
+             GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths,
+             GrGLuint pathBase, GrGLenum fillMode, GrGLuint mask,
+             GrGLenum transformType, const GrGLfloat *transformValues) {
+    GL_CALL(StencilFillPathInstanced(numPaths, pathNameType, paths, pathBase,
+                                     fillMode, mask, transformType, transformValues));
+}
+
+GrGLvoid GrGLPathRendering::stencilStrokePathInstanced(
+             GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths,
+             GrGLuint pathBase, GrGLint reference, GrGLuint mask,
+             GrGLenum transformType, const GrGLfloat *transformValues) {
+    GL_CALL(StencilStrokePathInstanced(numPaths, pathNameType, paths, pathBase,
+                                       reference, mask, transformType, transformValues));
+}
+
+GrGLvoid GrGLPathRendering::pathTexGen(GrGLenum texCoordSet, GrGLenum genMode,
+                                       GrGLint components, const GrGLfloat *coeffs) {
+    GL_CALL(PathTexGen(texCoordSet, genMode, components, coeffs));
+}
+
+GrGLvoid GrGLPathRendering::coverFillPath(GrGLuint path, GrGLenum coverMode) {
+    GL_CALL(CoverFillPath(path, coverMode));
+}
+
+GrGLvoid GrGLPathRendering::coverStrokePath(GrGLuint name, GrGLenum coverMode) {
+    GL_CALL(CoverStrokePath(name, coverMode));
+}
+
+GrGLvoid GrGLPathRendering::coverFillPathInstanced(
+             GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase,
+             GrGLenum coverMode, GrGLenum transformType, const GrGLfloat *transformValues) {
+    GL_CALL(CoverFillPathInstanced(numPaths, pathNameType, paths, pathBase,
+                                   coverMode, transformType, transformValues));
+}
+
+GrGLvoid GrGLPathRendering::coverStrokePathInstanced(
+             GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase,
+             GrGLenum coverMode, GrGLenum transformType, const GrGLfloat* transformValues) {
+    GL_CALL(CoverStrokePathInstanced(numPaths, pathNameType, paths, pathBase,
+                                     coverMode, transformType, transformValues));
+}
+
+GrGLvoid GrGLPathRendering::stencilThenCoverFillPath(GrGLuint path, GrGLenum fillMode,
+                                                     GrGLuint mask, GrGLenum coverMode) {
+    GL_CALL(StencilFillPath(path, fillMode, mask));
+    GL_CALL(CoverFillPath(path, coverMode));
+}
+
+GrGLvoid GrGLPathRendering::stencilThenCoverStrokePath(GrGLuint path, GrGLint reference,
+                                                       GrGLuint mask, GrGLenum coverMode) {
+    GL_CALL(StencilStrokePath(path, reference, mask));
+    GL_CALL(CoverStrokePath(path, coverMode));
+}
+
+GrGLvoid GrGLPathRendering::stencilThenCoverFillPathInstanced(
+             GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths,
+             GrGLuint pathBase, GrGLenum fillMode, GrGLuint mask, GrGLenum coverMode,
+             GrGLenum transformType, const GrGLfloat *transformValues) {
+    GL_CALL(StencilFillPathInstanced(numPaths, pathNameType, paths, pathBase,
+                                     fillMode, mask, transformType, transformValues));
+    GL_CALL(CoverFillPathInstanced(numPaths, pathNameType, paths, pathBase,
+                                   coverMode, transformType, transformValues));
+}
+
+GrGLvoid GrGLPathRendering::stencilThenCoverStrokePathInstanced(
+             GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths,
+             GrGLuint pathBase, GrGLint reference, GrGLuint mask, GrGLenum coverMode,
+             GrGLenum transformType, const GrGLfloat *transformValues) {
+    GL_CALL(StencilStrokePathInstanced(numPaths, pathNameType, paths, pathBase,
+                                       reference, mask, transformType, transformValues));
+    GL_CALL(CoverStrokePathInstanced(numPaths, pathNameType, paths, pathBase,
+                                     coverMode, transformType, transformValues));
+}
+
+GrGLvoid GrGLPathRendering::programPathFragmentInputGen(
+             GrGLuint program, GrGLint location, GrGLenum genMode,
+             GrGLint components, const GrGLfloat *coeffs) {

[Mark Kilgard, 2014/08/04 17:08:53]

good, I like this

+    SkFAIL("ProgramPathFragmentInputGen not supported in this GL context.");
+}
+
+
+// NV_path_rendering v1.2
+GrGLvoid GrGLPathRenderingV12::stencilThenCoverFillPath(GrGLuint path, GrGLenum fillMode,
+                                                        GrGLuint mask, GrGLenum coverMode) {
+    GL_CALL(StencilThenCoverFillPath(path, fillMode, mask, coverMode));
+}
+
+GrGLvoid GrGLPathRenderingV12::stencilThenCoverStrokePath(GrGLuint path, GrGLint reference,
+                                                          GrGLuint mask, GrGLenum coverMode) {
+    GL_CALL(StencilThenCoverStrokePath(path, reference, mask, coverMode));
+}
+
+GrGLvoid GrGLPathRenderingV12::stencilThenCoverFillPathInstanced(
+             GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths,
+             GrGLuint pathBase, GrGLenum fillMode, GrGLuint mask, GrGLenum coverMode,
+             GrGLenum transformType, const GrGLfloat *transformValues) {
+    GL_CALL(StencilThenCoverFillPathInstanced(numPaths, pathNameType, paths, pathBase, fillMode,
+                                               mask, coverMode, transformType, transformValues));
+}
+
+GrGLvoid GrGLPathRenderingV12::stencilThenCoverStrokePathInstanced(
+             GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths,
+             GrGLuint pathBase, GrGLint reference, GrGLuint mask, GrGLenum coverMode,
+             GrGLenum transformType, const GrGLfloat *transformValues) {
+    GL_CALL(StencilThenCoverStrokePathInstanced(numPaths, pathNameType, paths, pathBase, reference,
+                                                mask, coverMode, transformType, transformValues));
+}
+
+
+// NV_path_rendering v1.3
+GrGLvoid GrGLPathRenderingV13::programPathFragmentInputGen(
+             GrGLuint program, GrGLint location, GrGLenum genMode,
+             GrGLint components, const GrGLfloat *coeffs) {
+    GL_CALL(ProgramPathFragmentInputGen(program, location, genMode, components, coeffs));
+}