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Wide color support in the AA linearizing convex path renderer

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Bug: skia:
Change-Id: I6df042eb79af56b763cda1c58130dc40f6f4bbea
Reviewed-on: https://skia-review.googlesource.com/c/179993
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
This commit is contained in:
Brian Osman 2018-12-27 11:48:22 -05:00 committed by Skia Commit-Bot
parent 7561dba7c1
commit 4948e5578a
1 changed files with 25 additions and 26 deletions
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51
src/gpu/ops/GrAALinearizingConvexPathRenderer.cpp
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@ -83,20 +83,20 @@ GrAALinearizingConvexPathRenderer::onCanDrawPath(const CanDrawPathArgs& args) co
static void extract_verts(const GrAAConvexTessellator& tess,
void* vertData,
size_t vertexStride,
GrColor color,
const SkPMColor4f& origColor,
bool wideColor,
uint16_t firstIndex,
uint16_t* idxs,
bool tweakAlphaForCoverage) {
GrVertexWriter verts{vertData};
for (int i = 0; i < tess.numPts(); ++i) {
verts.write(tess.point(i));
if (tweakAlphaForCoverage) {
SkASSERT(SkScalarRoundToInt(255.0f * tess.coverage(i)) <= 255);
unsigned scale = SkScalarRoundToInt(255.0f * tess.coverage(i));
GrColor scaledColor = (0xff == scale) ? color : SkAlphaMulQ(color, scale);
verts.write(scaledColor);
} else {
verts.write(color, tess.coverage(i));
if (tweakAlphaForCoverage) {
for (int i = 0; i < tess.numPts(); ++i) {
verts.write(tess.point(i), GrVertexColor(origColor * tess.coverage(i), wideColor));
}
} else {
GrVertexColor color(origColor, wideColor);
for (int i = 0; i < tess.numPts(); ++i) {
verts.write(tess.point(i), color, tess.coverage(i));
}
}
@ -108,22 +108,18 @@ static void extract_verts(const GrAAConvexTessellator& tess,
static sk_sp<GrGeometryProcessor> create_lines_only_gp(const GrShaderCaps* shaderCaps,
bool tweakAlphaForCoverage,
const SkMatrix& viewMatrix,
bool usesLocalCoords) {
bool usesLocalCoords,
bool wideColor) {
using namespace GrDefaultGeoProcFactory;
Coverage::Type coverageType;
if (tweakAlphaForCoverage) {
coverageType = Coverage::kSolid_Type;
} else {
coverageType = Coverage::kAttribute_Type;
}
Coverage::Type coverageType =
tweakAlphaForCoverage ? Coverage::kSolid_Type : Coverage::kAttribute_Type;
LocalCoords::Type localCoordsType =
usesLocalCoords ? LocalCoords::kUsePosition_Type : LocalCoords::kUnused_Type;
return MakeForDeviceSpace(shaderCaps,
Color::kPremulGrColorAttribute_Type,
coverageType,
localCoordsType,
viewMatrix);
usesLocalCoords ? LocalCoords::kUsePosition_Type : LocalCoords::kUnused_Type;
Color::Type colorType =
wideColor ? Color::kPremulWideColorAttribute_Type : Color::kPremulGrColorAttribute_Type;
return MakeForDeviceSpace(shaderCaps, colorType, coverageType, localCoordsType, viewMatrix);
}
namespace {
@ -174,6 +170,7 @@ public:
bounds.outset(w, w);
}
this->setTransformedBounds(bounds, viewMatrix, HasAABloat::kYes, IsZeroArea::kNo);
fWideColor = !SkPMColor4fFitsInBytes(color);
}
const char* name() const override { return "AAFlatteningConvexPathOp"; }
@ -243,7 +240,8 @@ private:
sk_sp<GrGeometryProcessor> gp(create_lines_only_gp(target->caps().shaderCaps(),
fHelper.compatibleWithAlphaAsCoverage(),
this->viewMatrix(),
fHelper.usesLocalCoords()));
fHelper.usesLocalCoords(),
fWideColor));
if (!gp) {
SkDebugf("Couldn't create a GrGeometryProcessor\n");
return;
@ -296,9 +294,8 @@ private:
indices = (uint16_t*) sk_realloc_throw(indices, maxIndices * sizeof(uint16_t));
}
// TODO4F: Preserve float colors
extract_verts(tess, vertices + vertexStride * vertexCount, vertexStride,
args.fColor.toBytes_RGBA(), vertexCount, indices + indexCount,
args.fColor, fWideColor, vertexCount, indices + indexCount,
fHelper.compatibleWithAlphaAsCoverage());
vertexCount += currentVertices;
indexCount += currentIndices;
@ -318,6 +315,7 @@ private:
}
fPaths.push_back_n(that->fPaths.count(), that->fPaths.begin());
fWideColor |= that->fWideColor;
return CombineResult::kMerged;
}
@ -335,6 +333,7 @@ private:
SkSTArray<1, PathData, true> fPaths;
Helper fHelper;
bool fWideColor;
typedef GrMeshDrawOp INHERITED;
};