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Use GrVertexWriter in AA convex path renderer

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Bug: skia:
Change-Id: I7f4107ee64079a00302fc3fa9b81fba73b5f3219
Reviewed-on: https://skia-review.googlesource.com/c/179989
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Chris Dalton <csmartdalton@google.com>
This commit is contained in:
Brian Osman 2018-12-26 16:48:40 -05:00 committed by Skia Commit-Bot
parent 0b5370363d
commit d2fa2eb59f
2 changed files with 70 additions and 87 deletions
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9
src/gpu/GrVertexWriter.h
View File

@ -41,6 +41,9 @@ struct GrVertexWriter {
return Conditional<T>(condition, value);
}
template <typename T>
struct Skip {};
template <typename T, typename... Args>
void write(const T& val, const Args&... remainder) {
static_assert(std::is_pod<T>::value, "");
@ -79,6 +82,12 @@ struct GrVertexWriter {
this->write(remainder...);
}
template <typename T, typename... Args>
void write(const Skip<T>& val, const Args&... remainder) {
fPtr = SkTAddOffset<void>(fPtr, sizeof(T));
this->write(remainder...);
}
template <typename... Args>
void write(const Sk4f& vector, const Args&... remainder) {
float buffer[4];

148
src/gpu/ops/GrAAConvexPathRenderer.cpp
View File

@ -340,14 +340,6 @@ static bool get_segments(const SkPath& path,
}
}
struct QuadVertex {
SkPoint fPos;
GrColor fColor;
SkPoint fUV;
SkScalar fD0;
SkScalar fD1;
};
struct Draw {
Draw() : fVertexCnt(0), fIndexCnt(0) {}
int fVertexCnt;
@ -360,8 +352,9 @@ static void create_vertices(const SegmentArray& segments,
const SkPoint& fanPt,
GrColor color,
DrawArray* draws,
QuadVertex* verts,
uint16_t* idxs) {
GrVertexWriter& verts,
uint16_t* idxs,
size_t vertexStride) {
Draw* draw = &draws->push_back();
// alias just to make vert/index assignments easier to read.
int* v = &draw->fVertexCnt;
@ -382,30 +375,21 @@ static void create_vertices(const SegmentArray& segments,
vCount += 6;
}
if (draw->fVertexCnt + vCount > (1 << 16)) {
verts += *v;
idxs += *i;
draw = &draws->push_back();
v = &draw->fVertexCnt;
i = &draw->fIndexCnt;
}
const SkScalar negOneDists[2] = { -SK_Scalar1, -SK_Scalar1 };
// FIXME: These tris are inset in the 1 unit arc around the corner
verts[*v + 0].fPos = sega.endPt();
verts[*v + 1].fPos = verts[*v + 0].fPos + sega.endNorm();
verts[*v + 2].fPos = verts[*v + 0].fPos + segb.fMid;
verts[*v + 3].fPos = verts[*v + 0].fPos + segb.fNorms[0];
verts[*v + 0].fColor = color;
verts[*v + 1].fColor = color;
verts[*v + 2].fColor = color;
verts[*v + 3].fColor = color;
verts[*v + 0].fUV.set(0,0);
verts[*v + 1].fUV.set(0,-SK_Scalar1);
verts[*v + 2].fUV.set(0,-SK_Scalar1);
verts[*v + 3].fUV.set(0,-SK_Scalar1);
verts[*v + 0].fD0 = verts[*v + 0].fD1 = -SK_Scalar1;
verts[*v + 1].fD0 = verts[*v + 1].fD1 = -SK_Scalar1;
verts[*v + 2].fD0 = verts[*v + 2].fD1 = -SK_Scalar1;
verts[*v + 3].fD0 = verts[*v + 3].fD1 = -SK_Scalar1;
SkPoint p0 = sega.endPt();
// Position, Color, UV, D0, D1
verts.write(p0, color, SkPoint{0, 0}, negOneDists);
verts.write(p0 + sega.endNorm(), color, SkPoint{0, -SK_Scalar1}, negOneDists);
verts.write(p0 + segb.fMid, color, SkPoint{0, -SK_Scalar1}, negOneDists);
verts.write(p0 + segb.fNorms[0], color, SkPoint{0, -SK_Scalar1}, negOneDists);
idxs[*i + 0] = *v + 0;
idxs[*i + 1] = *v + 2;
@ -418,34 +402,17 @@ static void create_vertices(const SegmentArray& segments,
*i += 6;
if (Segment::kLine == segb.fType) {
verts[*v + 0].fPos = fanPt;
verts[*v + 1].fPos = sega.endPt();
verts[*v + 2].fPos = segb.fPts[0];
verts[*v + 3].fPos = verts[*v + 1].fPos + segb.fNorms[0];
verts[*v + 4].fPos = verts[*v + 2].fPos + segb.fNorms[0];
verts[*v + 0].fColor = color;
verts[*v + 1].fColor = color;
verts[*v + 2].fColor = color;
verts[*v + 3].fColor = color;
verts[*v + 4].fColor = color;
// we draw the line edge as a degenerate quad (u is 0, v is the
// signed distance to the edge)
SkScalar dist = SkPointPriv::DistanceToLineBetween(fanPt, verts[*v + 1].fPos,
verts[*v + 2].fPos);
verts[*v + 0].fUV.set(0, dist);
verts[*v + 1].fUV.set(0, 0);
verts[*v + 2].fUV.set(0, 0);
verts[*v + 3].fUV.set(0, -SK_Scalar1);
verts[*v + 4].fUV.set(0, -SK_Scalar1);
SkPoint v1Pos = sega.endPt();
SkPoint v2Pos = segb.fPts[0];
SkScalar dist = SkPointPriv::DistanceToLineBetween(fanPt, v1Pos, v2Pos);
verts[*v + 0].fD0 = verts[*v + 0].fD1 = -SK_Scalar1;
verts[*v + 1].fD0 = verts[*v + 1].fD1 = -SK_Scalar1;
verts[*v + 2].fD0 = verts[*v + 2].fD1 = -SK_Scalar1;
verts[*v + 3].fD0 = verts[*v + 3].fD1 = -SK_Scalar1;
verts[*v + 4].fD0 = verts[*v + 4].fD1 = -SK_Scalar1;
verts.write(fanPt, color, SkPoint{0, dist}, negOneDists);
verts.write(v1Pos, color, SkPoint{0, 0}, negOneDists);
verts.write(v2Pos, color, SkPoint{0, 0}, negOneDists);
verts.write(v1Pos + segb.fNorms[0], color, SkPoint{0, -SK_Scalar1}, negOneDists);
verts.write(v2Pos + segb.fNorms[0], color, SkPoint{0, -SK_Scalar1}, negOneDists);
idxs[*i + 0] = *v + 3;
idxs[*i + 1] = *v + 1;
@ -470,43 +437,49 @@ static void create_vertices(const SegmentArray& segments,
*v += 5;
} else {
void* quadVertsBegin = verts.fPtr;
SkPoint qpts[] = {sega.endPt(), segb.fPts[0], segb.fPts[1]};
SkScalar c0 = segb.fNorms[0].dot(qpts[0]);
SkScalar c1 = segb.fNorms[1].dot(qpts[2]);
GrVertexWriter::Skip<SkPoint> skipUVs;
verts.write(fanPt,
color, skipUVs,
-segb.fNorms[0].dot(fanPt) + c0,
-segb.fNorms[1].dot(fanPt) + c1);
verts.write(qpts[0],
color, skipUVs,
0.0f,
-segb.fNorms[1].dot(qpts[0]) + c1);
verts.write(qpts[2],
color, skipUVs,
-segb.fNorms[0].dot(qpts[2]) + c0,
0.0f);
verts.write(qpts[0] + segb.fNorms[0],
color, skipUVs,
-SK_ScalarMax/100,
-SK_ScalarMax/100);
verts.write(qpts[2] + segb.fNorms[1],
color, skipUVs,
-SK_ScalarMax/100,
-SK_ScalarMax/100);
SkVector midVec = segb.fNorms[0] + segb.fNorms[1];
midVec.normalize();
verts[*v + 0].fPos = fanPt;
verts[*v + 1].fPos = qpts[0];
verts[*v + 2].fPos = qpts[2];
verts[*v + 3].fPos = qpts[0] + segb.fNorms[0];
verts[*v + 4].fPos = qpts[2] + segb.fNorms[1];
verts[*v + 5].fPos = qpts[1] + midVec;
verts[*v + 0].fColor = color;
verts[*v + 1].fColor = color;
verts[*v + 2].fColor = color;
verts[*v + 3].fColor = color;
verts[*v + 4].fColor = color;
verts[*v + 5].fColor = color;
SkScalar c = segb.fNorms[0].dot(qpts[0]);
verts[*v + 0].fD0 = -segb.fNorms[0].dot(fanPt) + c;
verts[*v + 1].fD0 = 0.f;
verts[*v + 2].fD0 = -segb.fNorms[0].dot(qpts[2]) + c;
verts[*v + 3].fD0 = -SK_ScalarMax/100;
verts[*v + 4].fD0 = -SK_ScalarMax/100;
verts[*v + 5].fD0 = -SK_ScalarMax/100;
c = segb.fNorms[1].dot(qpts[2]);
verts[*v + 0].fD1 = -segb.fNorms[1].dot(fanPt) + c;
verts[*v + 1].fD1 = -segb.fNorms[1].dot(qpts[0]) + c;
verts[*v + 2].fD1 = 0.f;
verts[*v + 3].fD1 = -SK_ScalarMax/100;
verts[*v + 4].fD1 = -SK_ScalarMax/100;
verts[*v + 5].fD1 = -SK_ScalarMax/100;
verts.write(qpts[1] + midVec,
color, skipUVs,
-SK_ScalarMax/100,
-SK_ScalarMax/100);
GrPathUtils::QuadUVMatrix toUV(qpts);
toUV.apply(verts + *v, 6, sizeof(QuadVertex), offsetof(QuadVertex, fUV));
toUV.apply(quadVertsBegin, 6, vertexStride, sizeof(SkPoint) + sizeof(GrColor));
idxs[*i + 0] = *v + 3;
idxs[*i + 1] = *v + 1;
@ -785,11 +758,11 @@ private:
const GrBuffer* vertexBuffer;
int firstVertex;
SkASSERT(sizeof(QuadVertex) == quadProcessor->vertexStride());
QuadVertex* verts = reinterpret_cast<QuadVertex*>(target->makeVertexSpace(
sizeof(QuadVertex), vertexCount, &vertexBuffer, &firstVertex));
const size_t kVertexStride = quadProcessor->vertexStride();
GrVertexWriter verts{target->makeVertexSpace(kVertexStride, vertexCount,
&vertexBuffer, &firstVertex)};
if (!verts) {
if (!verts.fPtr) {
SkDebugf("Could not allocate vertices\n");
return;
}
@ -805,7 +778,8 @@ private:
SkSTArray<kPreallocDrawCnt, Draw, true> draws;
// TODO4F: Preserve float colors
create_vertices(segments, fanPt, args.fColor.toBytes_RGBA(), &draws, verts, idxs);
create_vertices(segments, fanPt, args.fColor.toBytes_RGBA(), &draws, verts, idxs,
kVertexStride);
GrMesh* meshes = target->allocMeshes(draws.count());
for (int j = 0; j < draws.count(); ++j) {