本文整理汇总了C++中GrDrawState::setVertexAttribs方法的典型用法代码示例。如果您正苦于以下问题：C++ GrDrawState::setVertexAttribs方法的具体用法？C++ GrDrawState::setVertexAttribs怎么用？C++ GrDrawState::setVertexAttribs使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类GrDrawState的用法示例。
在下文中一共展示了GrDrawState::setVertexAttribs方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: onDrawPath
bool GrAndroidPathRenderer::onDrawPath(const SkPath& origPath,
const SkStrokeRec& stroke,
GrDrawTarget* target,
bool antiAlias) {
// generate verts using Android algorithm
android::uirenderer::VertexBuffer vertices;
android::uirenderer::PathRenderer::ConvexPathVertices(origPath, stroke, antiAlias, NULL,
&vertices);
// set vertex attributes depending on anti-alias
GrDrawState* drawState = target->drawState();
if (antiAlias) {
// position + coverage
GrVertexAttrib attribs[] = {
GrVertexAttrib(kVec2f_GrVertexAttribType, 0),
GrVertexAttrib(kVec4ub_GrVertexAttribType, sizeof(GrPoint))
};
drawState->setVertexAttribs(attribs, SK_ARRAY_COUNT(attribs));
drawState->setAttribIndex(GrDrawState::kPosition_AttribIndex, 0);
drawState->setAttribIndex(GrDrawState::kCoverage_AttribIndex, 1);
drawState->setAttribBindings(GrDrawState::kCoverage_AttribBindingsBit);
} else {
drawState->setDefaultVertexAttribs();
}
// allocate our vert buffer
int vertCount = vertices.getSize();
GrDrawTarget::AutoReleaseGeometry geo(target, vertCount, 0);
if (!geo.succeeded()) {
SkDebugf("Failed to get space for vertices!\n");
return false;
}
// copy android verts to our vertex buffer
if (antiAlias) {
SkASSERT(sizeof(ColorVertex) == drawState->getVertexSize());
ColorVertex* outVert = reinterpret_cast<ColorVertex*>(geo.vertices());
android::uirenderer::AlphaVertex* inVert =
reinterpret_cast<android::uirenderer::AlphaVertex*>(vertices.getBuffer());
for (int i = 0; i < vertCount; ++i) {
// copy vertex position
outVert->pos.set(inVert->position[0], inVert->position[1]);
// copy alpha
int coverage = static_cast<int>(inVert->alpha * 0xff);
outVert->color = GrColorPackRGBA(coverage, coverage, coverage, coverage);
++outVert;
++inVert;
}
} else {
size_t vsize = drawState->getVertexSize();
size_t copySize = vsize*vertCount;
memcpy(geo.vertices(), vertices.getBuffer(), copySize);
}
// render it
target->drawNonIndexed(kTriangleStrip_GrPrimitiveType, 0, vertCount);
return true;
}