27847dedd9
git-svn-id: http://skia.googlecode.com/svn/trunk@832 2bbb7eff-a529-9590-31e7-b0007b416f81
136 lines
4.9 KiB
C++
136 lines
4.9 KiB
C++
/*
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Copyright 2011 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#ifndef GrContext_impl_DEFINED
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#define GrContext_impl_DEFINED
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template <typename POS_SRC, typename TEX_SRC,
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typename COL_SRC, typename IDX_SRC>
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inline void GrContext::drawCustomVertices(const GrPaint& paint,
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GrPrimitiveType primitiveType,
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const POS_SRC& posSrc,
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const TEX_SRC* texCoordSrc,
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const COL_SRC* colorSrc,
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const IDX_SRC* idxSrc) {
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GrVertexLayout layout = 0;
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GrDrawTarget::AutoReleaseGeometry geo;
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GrDrawTarget* target = this->prepareToDraw(paint, kUnbuffered_DrawCategory);
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if (NULL != paint.getTexture()) {
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if (NULL != texCoordSrc) {
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layout |= GrDrawTarget::StageTexCoordVertexLayoutBit(0,0);
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} else {
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layout |= GrDrawTarget::StagePosAsTexCoordVertexLayoutBit(0);
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}
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}
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if (NULL != colorSrc) {
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layout |= GrDrawTarget::kColor_VertexLayoutBit;
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}
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int vertexCount = posSrc.count();
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int indexCount = (NULL != idxSrc) ? idxSrc->count() : 0;
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if (!geo.set(target, layout, vertexCount, indexCount)) {
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GrPrintf("Failed to get space for vertices!");
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return;
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}
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int texOffsets[GrDrawTarget::kMaxTexCoords];
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int colorOffset;
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int vsize = GrDrawTarget::VertexSizeAndOffsetsByIdx(layout,
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texOffsets,
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&colorOffset);
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void* curVertex = geo.vertices();
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for (int i = 0; i < vertexCount; ++i) {
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posSrc.writeValue(i, (GrPoint*)curVertex);
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if (texOffsets[0] > 0) {
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texCoordSrc->writeValue(i, (GrPoint*)((intptr_t)curVertex + texOffsets[0]));
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}
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if (colorOffset > 0) {
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colorSrc->writeValue(i, (GrColor*)((intptr_t)curVertex + colorOffset));
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}
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curVertex = (void*)((intptr_t)curVertex + vsize);
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}
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uint16_t* indices = (uint16_t*) geo.indices();
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for (int i = 0; i < indexCount; ++i) {
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idxSrc->writeValue(i, indices + i);
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}
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if (NULL == idxSrc) {
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target->drawNonIndexed(primitiveType, 0, vertexCount);
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} else {
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target->drawIndexed(primitiveType, 0, 0, vertexCount, indexCount);
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}
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}
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class GrNullTexCoordSource {
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public:
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void writeValue(int i, GrPoint* dstCoord) const { GrAssert(false); }
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};
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class GrNullColorSource {
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public:
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void writeValue(int i, GrColor* dstColor) const { GrAssert(false); }
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};
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class GrNullIndexSource {
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public:
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void writeValue(int i, uint16_t* dstIndex) const { GrAssert(false); }
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int count() const { GrAssert(false); return 0; }
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};
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template <typename POS_SRC>
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inline void GrContext::drawCustomVertices(const GrPaint& paint,
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GrPrimitiveType primitiveType,
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const POS_SRC& posSrc) {
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this->drawCustomVertices<POS_SRC,
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GrNullTexCoordSource,
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GrNullColorSource,
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GrNullIndexSource>(paint, primitiveType, posSrc,
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NULL, NULL, NULL);
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}
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template <typename POS_SRC, typename TEX_SRC>
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inline void GrContext::drawCustomVertices(const GrPaint& paint,
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GrPrimitiveType primitiveType,
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const POS_SRC& posSrc,
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const TEX_SRC* texCoordSrc) {
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this->drawCustomVertices<POS_SRC, TEX_SRC,
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GrNullColorSource,
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GrNullIndexSource>(paint, primitiveType, posSrc,
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texCoordSrc, NULL, NULL);
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}
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template <typename POS_SRC, typename TEX_SRC, typename COL_SRC>
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inline void GrContext::drawCustomVertices(const GrPaint& paint,
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GrPrimitiveType primitiveType,
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const POS_SRC& posSrc,
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const TEX_SRC* texCoordSrc,
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const COL_SRC* colorSrc) {
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drawCustomVertices<POS_SRC, TEX_SRC, COL_SRC,
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GrNullIndexSource>(paint, primitiveType, posSrc,
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texCoordSrc, colorSrc, NULL);
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}
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#endif
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