AuroraMiddleware/skia2
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Two optimizations for the tesselated path renderer:

Browse Source 
1)  If the path contains a single convex subpath, and we're not using inverted
fill modes, skip the tesselation and draw the interpolated path as a triangle
fan directly.
2)  Use GrDrawTarget.set*SourceToArray(), rather than creating a new
AutoReleaseGeometry, saving a copy of the vertex and index data.

Review URL:  http://codereview.appspot.com/4280076/



git-svn-id: http://skia.googlecode.com/svn/trunk@1014 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
senorblanco@chromium.org 2011-03-29 17:42:30 +00:00
parent 9d18b7873c
commit cf3edc9c97
1 changed files with 9 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
gpu/src/GrTesselatedPathRenderer.cpp
View File

@ -205,6 +205,13 @@ FINISHED:
size_t count = vert - base;
if (subpathCnt == 1 && !inverted && path->convexHint() == kConvex_ConvexHint) {
target->setVertexSourceToArray(layout, base, count);
target->drawNonIndexed(kTriangleFan_PrimitiveType, 0, count);
delete[] base;
return;
}
// FIXME: This copy could be removed if we had (templated?) versions of
// generate_*_point above that wrote directly into doubles.
double* inVertices = new double[count * 3];
@ -243,15 +250,9 @@ FINISHED:
internal_gluTessEndPolygon(tess);
internal_gluDeleteTess(tess);
// FIXME: If we could figure out the maxIndices before running the
// tesselator, we could allocate the geometry upfront, rather than making
// yet another copy.
GrDrawTarget::AutoReleaseGeometry geom(target, layout, vertices.count(), indices.count());
memcpy(geom.vertices(), vertices.begin(), vertices.count() * sizeof(GrPoint));
memcpy(geom.indices(), indices.begin(), indices.count() * sizeof(short));
if (indices.count() > 0) {
target->setVertexSourceToArray(layout, vertices.begin(), vertices.count());
target->setIndexSourceToArray(indices.begin(), indices.count());
target->drawIndexed(kTriangles_PrimitiveType,
0,
0,