void GrAAHairLinePathRenderer::drawPath(GrDrawState::StageMask stageMask) {
if (!this->createGeom(stageMask)) {
return;
}
GrDrawState* drawState = fTarget->drawState();
GrDrawTarget::AutoStateRestore asr;
if (!drawState->getViewMatrix().hasPerspective()) {
asr.set(fTarget);
GrMatrix ivm;
if (drawState->getViewInverse(&ivm)) {
drawState->preConcatSamplerMatrices(stageMask, ivm);
}
drawState->setViewMatrix(GrMatrix::I());
}
// TODO: See whether rendering lines as degenerate quads improves perf
// when we have a mix
fTarget->setIndexSourceToBuffer(fLinesIndexBuffer);
int lines = 0;
int nBufLines = fLinesIndexBuffer->maxQuads();
while (lines < fLineSegmentCnt) {
int n = GrMin(fLineSegmentCnt-lines, nBufLines);
drawState->setVertexEdgeType(GrDrawState::kHairLine_EdgeType);
fTarget->drawIndexed(kTriangles_PrimitiveType,
kVertsPerLineSeg*lines, // startV
0, // startI
kVertsPerLineSeg*n, // vCount
kIdxsPerLineSeg*n); // iCount
lines += n;
}
fTarget->setIndexSourceToBuffer(fQuadsIndexBuffer);
int quads = 0;
while (quads < fQuadCnt) {
int n = GrMin(fQuadCnt-quads, kNumQuadsInIdxBuffer);
drawState->setVertexEdgeType(GrDrawState::kHairQuad_EdgeType);
fTarget->drawIndexed(kTriangles_PrimitiveType,
4*fLineSegmentCnt + kVertsPerQuad*quads, // startV
0, // startI
kVertsPerQuad*n, // vCount
kIdxsPerQuad*n); // iCount
quads += n;
}
}
bool GrAAHairLinePathRenderer::onDrawPath(const SkPath& path,
const SkStrokeRec& stroke,
GrDrawTarget* target,
bool antiAlias) {
GrDrawState* drawState = target->drawState();
SkScalar hairlineCoverage;
if (IsStrokeHairlineOrEquivalent(stroke,
target->getDrawState().getViewMatrix(),
&hairlineCoverage)) {
uint8_t newCoverage = SkScalarRoundToInt(hairlineCoverage *
target->getDrawState().getCoverage());
target->drawState()->setCoverage(newCoverage);
}
SkIRect devClipBounds;
target->getClip()->getConservativeBounds(drawState->getRenderTarget(), &devClipBounds);
int lineCnt;
int quadCnt;
int conicCnt;
PREALLOC_PTARRAY(128) lines;
PREALLOC_PTARRAY(128) quads;
PREALLOC_PTARRAY(128) conics;
IntArray qSubdivs;
FloatArray cWeights;
quadCnt = generate_lines_and_quads(path, drawState->getViewMatrix(), devClipBounds,
&lines, &quads, &conics, &qSubdivs, &cWeights);
lineCnt = lines.count() / 2;
conicCnt = conics.count() / 3;
// do lines first
if (lineCnt) {
GrDrawTarget::AutoReleaseGeometry arg;
SkRect devBounds;
if (!this->createLineGeom(path,
target,
lines,
lineCnt,
&arg,
&devBounds)) {
return false;
}
GrDrawTarget::AutoStateRestore asr;
// createLineGeom transforms the geometry to device space when the matrix does not have
// perspective.
if (target->getDrawState().getViewMatrix().hasPerspective()) {
asr.set(target, GrDrawTarget::kPreserve_ASRInit);
} else if (!asr.setIdentity(target, GrDrawTarget::kPreserve_ASRInit)) {
return false;
}
GrDrawState* drawState = target->drawState();
// Check devBounds
SkASSERT(check_bounds<LineVertex>(drawState, devBounds, arg.vertices(),
kVertsPerLineSeg * lineCnt));
{
GrDrawState::AutoRestoreEffects are(drawState);
target->setIndexSourceToBuffer(fLinesIndexBuffer);
int lines = 0;
while (lines < lineCnt) {
int n = SkTMin(lineCnt - lines, kNumLineSegsInIdxBuffer);
target->drawIndexed(kTriangles_GrPrimitiveType,
kVertsPerLineSeg*lines, // startV
0, // startI
kVertsPerLineSeg*n, // vCount
kIdxsPerLineSeg*n, // iCount
&devBounds);
lines += n;
}
}
}
// then quadratics/conics
if (quadCnt || conicCnt) {
GrDrawTarget::AutoReleaseGeometry arg;
SkRect devBounds;
if (!this->createBezierGeom(path,
target,
quads,
quadCnt,
conics,
conicCnt,
qSubdivs,
cWeights,
&arg,
&devBounds)) {
return false;
}
GrDrawTarget::AutoStateRestore asr;
// createGeom transforms the geometry to device space when the matrix does not have
// perspective.
if (target->getDrawState().getViewMatrix().hasPerspective()) {
asr.set(target, GrDrawTarget::kPreserve_ASRInit);
} else if (!asr.setIdentity(target, GrDrawTarget::kPreserve_ASRInit)) {
return false;
}
GrDrawState* drawState = target->drawState();
static const int kEdgeAttrIndex = 1;
// Check devBounds
SkASSERT(check_bounds<BezierVertex>(drawState, devBounds, arg.vertices(),
kVertsPerQuad * quadCnt + kVertsPerQuad * conicCnt));
if (quadCnt > 0) {
GrEffect* hairQuadEffect = GrQuadEffect::Create(kHairlineAA_GrEffectEdgeType,
*target->caps());
SkASSERT(hairQuadEffect);
GrDrawState::AutoRestoreEffects are(drawState);
target->setIndexSourceToBuffer(fQuadsIndexBuffer);
drawState->setGeometryProcessor(hairQuadEffect, kEdgeAttrIndex)->unref();
int quads = 0;
while (quads < quadCnt) {
int n = SkTMin(quadCnt - quads, kNumQuadsInIdxBuffer);
target->drawIndexed(kTriangles_GrPrimitiveType,
kVertsPerQuad*quads, // startV
0, // startI
kVertsPerQuad*n, // vCount
kIdxsPerQuad*n, // iCount
&devBounds);
quads += n;
}
}
if (conicCnt > 0) {
GrDrawState::AutoRestoreEffects are(drawState);
GrEffect* hairConicEffect = GrConicEffect::Create(kHairlineAA_GrEffectEdgeType,
*target->caps());
SkASSERT(hairConicEffect);
drawState->setGeometryProcessor(hairConicEffect, 1, 2)->unref();
int conics = 0;
while (conics < conicCnt) {
int n = SkTMin(conicCnt - conics, kNumQuadsInIdxBuffer);
target->drawIndexed(kTriangles_GrPrimitiveType,
kVertsPerQuad*(quadCnt + conics), // startV
0, // startI
kVertsPerQuad*n, // vCount
kIdxsPerQuad*n, // iCount
&devBounds);
conics += n;
}
}
}
target->resetIndexSource();
return true;
}
bool GrAAHairLinePathRenderer::onDrawPath(const SkPath& path,
GrPathFill fill,
const GrVec* translate,
GrDrawTarget* target,
GrDrawState::StageMask stageMask,
bool antiAlias) {
int lineCnt;
int quadCnt;
GrDrawTarget::AutoReleaseGeometry arg;
if (!this->createGeom(path,
translate,
target,
stageMask,
&lineCnt,
&quadCnt,
&arg)) {
return false;
}
GrDrawTarget::AutoStateRestore asr;
GrDrawState* drawState = target->drawState();
if (!drawState->getViewMatrix().hasPerspective()) {
// we are going to whack the view matrix to identity to remove
// perspective.
asr.set(target,
GrDrawTarget::kPreserve_ASRInit);
drawState = target->drawState();
GrMatrix ivm;
if (drawState->getViewInverse(&ivm)) {
drawState->preConcatSamplerMatrices(stageMask, ivm);
}
drawState->viewMatrix()->reset();
}
// TODO: See whether rendering lines as degenerate quads improves perf
// when we have a mix
target->setIndexSourceToBuffer(fLinesIndexBuffer);
int lines = 0;
int nBufLines = fLinesIndexBuffer->maxQuads();
while (lines < lineCnt) {
int n = GrMin(lineCnt - lines, nBufLines);
drawState->setVertexEdgeType(GrDrawState::kHairLine_EdgeType);
target->drawIndexed(kTriangles_GrPrimitiveType,
kVertsPerLineSeg*lines, // startV
0, // startI
kVertsPerLineSeg*n, // vCount
kIdxsPerLineSeg*n); // iCount
lines += n;
}
target->setIndexSourceToBuffer(fQuadsIndexBuffer);
int quads = 0;
while (quads < quadCnt) {
int n = GrMin(quadCnt - quads, kNumQuadsInIdxBuffer);
drawState->setVertexEdgeType(GrDrawState::kHairQuad_EdgeType);
target->drawIndexed(kTriangles_GrPrimitiveType,
4 * lineCnt + kVertsPerQuad*quads, // startV
0, // startI
kVertsPerQuad*n, // vCount
kIdxsPerQuad*n); // iCount
quads += n;
}
return true;
}