blob: a74014b96bad9590da94f25dfdf6eba77a55bf4c [file] [log] [blame]
/*
* 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/GrGLNameAllocator.h"
#include "gl/GrGLUtil.h"
#include "gl/GrGLGpu.h"
#include "GrGLPath.h"
#include "GrGLPathRange.h"
#include "GrGLPathRendering.h"
#include "SkStream.h"
#include "SkTypeface.h"
#define GL_CALL(X) GR_GL_CALL(this->gpu()->glInterface(), X)
#define GL_CALL_RET(RET, X) GR_GL_CALL_RET(this->gpu()->glInterface(), RET, X)
static const GrGLenum gIndexType2GLType[] = {
GR_GL_UNSIGNED_BYTE,
GR_GL_UNSIGNED_SHORT,
GR_GL_UNSIGNED_INT
};
GR_STATIC_ASSERT(0 == GrPathRange::kU8_PathIndexType);
GR_STATIC_ASSERT(1 == GrPathRange::kU16_PathIndexType);
GR_STATIC_ASSERT(2 == GrPathRange::kU32_PathIndexType);
GR_STATIC_ASSERT(GrPathRange::kU32_PathIndexType == GrPathRange::kLast_PathIndexType);
static const GrGLenum gXformType2GLType[] = {
GR_GL_NONE,
GR_GL_TRANSLATE_X,
GR_GL_TRANSLATE_Y,
GR_GL_TRANSLATE_2D,
GR_GL_TRANSPOSE_AFFINE_2D
};
GR_STATIC_ASSERT(0 == GrPathRendering::kNone_PathTransformType);
GR_STATIC_ASSERT(1 == GrPathRendering::kTranslateX_PathTransformType);
GR_STATIC_ASSERT(2 == GrPathRendering::kTranslateY_PathTransformType);
GR_STATIC_ASSERT(3 == GrPathRendering::kTranslate_PathTransformType);
GR_STATIC_ASSERT(4 == GrPathRendering::kAffine_PathTransformType);
GR_STATIC_ASSERT(GrPathRendering::kAffine_PathTransformType == GrPathRendering::kLast_PathTransformType);
static GrGLenum gr_stencil_op_to_gl_path_rendering_fill_mode(GrStencilOp op) {
switch (op) {
default:
SkFAIL("Unexpected path fill.");
/* fallthrough */;
case kIncClamp_StencilOp:
return GR_GL_COUNT_UP;
case kInvert_StencilOp:
return GR_GL_INVERT;
}
}
GrGLPathRendering::GrGLPathRendering(GrGLGpu* gpu)
: GrPathRendering(gpu) {
const GrGLInterface* glInterface = gpu->glInterface();
fCaps.bindFragmentInputSupport =
nullptr != glInterface->fFunctions.fBindFragmentInputLocation;
}
GrGLPathRendering::~GrGLPathRendering() {
}
void GrGLPathRendering::abandonGpuResources() {
fPathNameAllocator.reset(nullptr);
}
void GrGLPathRendering::resetContext() {
fHWProjectionMatrixState.invalidate();
// we don't use the model view matrix.
GL_CALL(MatrixLoadIdentity(GR_GL_PATH_MODELVIEW));
fHWPathStencilSettings.invalidate();
}
GrPath* GrGLPathRendering::createPath(const SkPath& inPath, const GrStrokeInfo& stroke) {
return new GrGLPath(this->gpu(), inPath, stroke);
}
GrPathRange* GrGLPathRendering::createPathRange(GrPathRange::PathGenerator* pathGenerator,
const GrStrokeInfo& stroke) {
return new GrGLPathRange(this->gpu(), pathGenerator, stroke);
}
void GrGLPathRendering::onStencilPath(const StencilPathArgs& args, const GrPath* path) {
GrGLGpu* gpu = this->gpu();
SkASSERT(gpu->caps()->shaderCaps()->pathRenderingSupport());
gpu->flushColorWrite(false);
gpu->flushDrawFace(GrPipelineBuilder::kBoth_DrawFace);
GrGLRenderTarget* rt = static_cast<GrGLRenderTarget*>(args.fRenderTarget);
SkISize size = SkISize::Make(rt->width(), rt->height());
this->setProjectionMatrix(*args.fViewMatrix, size, rt->origin());
gpu->flushScissor(*args.fScissor, rt->getViewport(), rt->origin());
gpu->flushHWAAState(rt, args.fUseHWAA, true);
gpu->flushRenderTarget(rt, nullptr);
const GrGLPath* glPath = static_cast<const GrGLPath*>(path);
this->flushPathStencilSettings(*args.fStencil);
SkASSERT(!fHWPathStencilSettings.isTwoSided());
GrGLenum fillMode = gr_stencil_op_to_gl_path_rendering_fill_mode(
fHWPathStencilSettings.passOp(GrStencilSettings::kFront_Face));
GrGLint writeMask = fHWPathStencilSettings.writeMask(GrStencilSettings::kFront_Face);
if (glPath->shouldFill()) {
GL_CALL(StencilFillPath(glPath->pathID(), fillMode, writeMask));
}
if (glPath->shouldStroke()) {
GL_CALL(StencilStrokePath(glPath->pathID(), 0xffff, writeMask));
}
}
void GrGLPathRendering::onDrawPath(const DrawPathArgs& args, const GrPath* path) {
if (!this->gpu()->flushGLState(args)) {
return;
}
const GrGLPath* glPath = static_cast<const GrGLPath*>(path);
this->flushPathStencilSettings(*args.fStencil);
SkASSERT(!fHWPathStencilSettings.isTwoSided());
GrGLenum fillMode = gr_stencil_op_to_gl_path_rendering_fill_mode(
fHWPathStencilSettings.passOp(GrStencilSettings::kFront_Face));
GrGLint writeMask = fHWPathStencilSettings.writeMask(GrStencilSettings::kFront_Face);
if (glPath->shouldStroke()) {
if (glPath->shouldFill()) {
GL_CALL(StencilFillPath(glPath->pathID(), fillMode, writeMask));
}
GL_CALL(StencilThenCoverStrokePath(glPath->pathID(), 0xffff, writeMask,
GR_GL_BOUNDING_BOX));
} else {
GL_CALL(StencilThenCoverFillPath(glPath->pathID(), fillMode, writeMask,
GR_GL_BOUNDING_BOX));
}
}
void GrGLPathRendering::onDrawPaths(const DrawPathArgs& args, const GrPathRange* pathRange,
const void* indices, PathIndexType indexType,
const float transformValues[], PathTransformType transformType,
int count) {
if (!this->gpu()->flushGLState(args)) {
return;
}
this->flushPathStencilSettings(*args.fStencil);
SkASSERT(!fHWPathStencilSettings.isTwoSided());
const GrGLPathRange* glPathRange = static_cast<const GrGLPathRange*>(pathRange);
GrGLenum fillMode =
gr_stencil_op_to_gl_path_rendering_fill_mode(
fHWPathStencilSettings.passOp(GrStencilSettings::kFront_Face));
GrGLint writeMask =
fHWPathStencilSettings.writeMask(GrStencilSettings::kFront_Face);
if (glPathRange->shouldStroke()) {
if (glPathRange->shouldFill()) {
GL_CALL(StencilFillPathInstanced(
count, gIndexType2GLType[indexType], indices, glPathRange->basePathID(),
fillMode, writeMask, gXformType2GLType[transformType],
transformValues));
}
GL_CALL(StencilThenCoverStrokePathInstanced(
count, gIndexType2GLType[indexType], indices, glPathRange->basePathID(),
0xffff, writeMask, GR_GL_BOUNDING_BOX_OF_BOUNDING_BOXES,
gXformType2GLType[transformType], transformValues));
} else {
GL_CALL(StencilThenCoverFillPathInstanced(
count, gIndexType2GLType[indexType], indices, glPathRange->basePathID(),
fillMode, writeMask, GR_GL_BOUNDING_BOX_OF_BOUNDING_BOXES,
gXformType2GLType[transformType], transformValues));
}
}
void GrGLPathRendering::setProgramPathFragmentInputTransform(GrGLuint program, GrGLint location,
GrGLenum genMode, GrGLint components,
const SkMatrix& matrix) {
GrGLfloat coefficients[3 * 3];
SkASSERT(components >= 1 && components <= 3);
coefficients[0] = SkScalarToFloat(matrix[SkMatrix::kMScaleX]);
coefficients[1] = SkScalarToFloat(matrix[SkMatrix::kMSkewX]);
coefficients[2] = SkScalarToFloat(matrix[SkMatrix::kMTransX]);
if (components >= 2) {
coefficients[3] = SkScalarToFloat(matrix[SkMatrix::kMSkewY]);
coefficients[4] = SkScalarToFloat(matrix[SkMatrix::kMScaleY]);
coefficients[5] = SkScalarToFloat(matrix[SkMatrix::kMTransY]);
}
if (components >= 3) {
coefficients[6] = SkScalarToFloat(matrix[SkMatrix::kMPersp0]);
coefficients[7] = SkScalarToFloat(matrix[SkMatrix::kMPersp1]);
coefficients[8] = SkScalarToFloat(matrix[SkMatrix::kMPersp2]);
}
GL_CALL(ProgramPathFragmentInputGen(program, location, genMode, components, coefficients));
}
void GrGLPathRendering::setProjectionMatrix(const SkMatrix& matrix,
const SkISize& renderTargetSize,
GrSurfaceOrigin renderTargetOrigin) {
SkASSERT(this->gpu()->glCaps().shaderCaps()->pathRenderingSupport());
if (renderTargetOrigin == fHWProjectionMatrixState.fRenderTargetOrigin &&
renderTargetSize == fHWProjectionMatrixState.fRenderTargetSize &&
matrix.cheapEqualTo(fHWProjectionMatrixState.fViewMatrix)) {
return;
}
fHWProjectionMatrixState.fViewMatrix = matrix;
fHWProjectionMatrixState.fRenderTargetSize = renderTargetSize;
fHWProjectionMatrixState.fRenderTargetOrigin = renderTargetOrigin;
GrGLfloat glMatrix[4 * 4];
fHWProjectionMatrixState.getRTAdjustedGLMatrix<4>(glMatrix);
GL_CALL(MatrixLoadf(GR_GL_PATH_PROJECTION, glMatrix));
}
GrGLuint GrGLPathRendering::genPaths(GrGLsizei range) {
if (range > 1) {
GrGLuint name;
GL_CALL_RET(name, GenPaths(range));
return name;
}
if (nullptr == fPathNameAllocator.get()) {
static const int range = 65536;
GrGLuint firstName;
GL_CALL_RET(firstName, GenPaths(range));
fPathNameAllocator.reset(new 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;
}
void 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(nullptr == fPathNameAllocator.get() ||
path + range <= fPathNameAllocator->firstName() ||
path >= fPathNameAllocator->endName());
GL_CALL(DeletePaths(path, range));
return;
}
if (nullptr == 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, nullptr, 0, GR_GL_FLOAT, nullptr));
fPathNameAllocator->free(path);
}
void GrGLPathRendering::flushPathStencilSettings(const GrStencilSettings& stencilSettings) {
if (fHWPathStencilSettings != stencilSettings) {
// Just the func, ref, and mask is set here. The op and write mask are params to the call
// that draws the path to the SB (glStencilFillPath)
GrGLenum func =
GrToGLStencilFunc(stencilSettings.func(GrStencilSettings::kFront_Face));
GL_CALL(PathStencilFunc(func, stencilSettings.funcRef(GrStencilSettings::kFront_Face),
stencilSettings.funcMask(GrStencilSettings::kFront_Face)));
fHWPathStencilSettings = stencilSettings;
}
}
inline GrGLGpu* GrGLPathRendering::gpu() {
return static_cast<GrGLGpu*>(fGpu);
}