05f3d6e511
Tessellate and cache (where possible) shadow and round rect tessellation tasks. Change-Id: I2cfda8e11d83d51ea74af871235cf26e8f831d40
121 lines
3.7 KiB
C++
121 lines
3.7 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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 ANDROID_HWUI_VERTEX_BUFFER_H
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#define ANDROID_HWUI_VERTEX_BUFFER_H
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namespace android {
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namespace uirenderer {
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class VertexBuffer {
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public:
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enum Mode {
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kStandard = 0,
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kOnePolyRingShadow = 1,
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kTwoPolyRingShadow = 2
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};
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VertexBuffer()
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: mBuffer(0)
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, mVertexCount(0)
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, mByteCount(0)
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, mMode(kStandard)
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, mCleanupMethod(NULL)
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{}
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~VertexBuffer() {
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if (mCleanupMethod) mCleanupMethod(mBuffer);
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}
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/**
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This should be the only method used by the Tessellator. Subsequent calls to
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alloc will allocate space within the first allocation (useful if you want to
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eventually allocate multiple regions within a single VertexBuffer, such as
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with PathTessellator::tessellateLines())
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*/
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template <class TYPE>
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TYPE* alloc(int vertexCount) {
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if (mVertexCount) {
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TYPE* reallocBuffer = (TYPE*)mReallocBuffer;
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// already have allocated the buffer, re-allocate space within
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if (mReallocBuffer != mBuffer) {
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// not first re-allocation, leave space for degenerate triangles to separate strips
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reallocBuffer += 2;
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}
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mReallocBuffer = reallocBuffer + vertexCount;
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return reallocBuffer;
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}
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mVertexCount = vertexCount;
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mByteCount = mVertexCount * sizeof(TYPE);
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mReallocBuffer = mBuffer = (void*)new TYPE[vertexCount];
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mCleanupMethod = &(cleanup<TYPE>);
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return (TYPE*)mBuffer;
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}
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template <class TYPE>
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void copyInto(const VertexBuffer& srcBuffer, float xOffset, float yOffset) {
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int verticesToCopy = srcBuffer.getVertexCount();
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TYPE* dst = alloc<TYPE>(verticesToCopy);
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TYPE* src = (TYPE*)srcBuffer.getBuffer();
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for (int i = 0; i < verticesToCopy; i++) {
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TYPE::copyWithOffset(&dst[i], src[i], xOffset, yOffset);
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}
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}
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const void* getBuffer() const { return mBuffer; }
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const Rect& getBounds() const { return mBounds; }
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unsigned int getVertexCount() const { return mVertexCount; }
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unsigned int getSize() const { return mByteCount; }
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Mode getMode() const { return mMode; }
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void setBounds(Rect bounds) { mBounds = bounds; }
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void setMode(Mode mode) { mMode = mode; }
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template <class TYPE>
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void createDegenerateSeparators(int allocSize) {
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TYPE* end = (TYPE*)mBuffer + mVertexCount;
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for (TYPE* degen = (TYPE*)mBuffer + allocSize; degen < end; degen += 2 + allocSize) {
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memcpy(degen, degen - 1, sizeof(TYPE));
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memcpy(degen + 1, degen + 2, sizeof(TYPE));
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}
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}
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private:
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template <class TYPE>
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static void cleanup(void* buffer) {
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delete[] (TYPE*)buffer;
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}
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Rect mBounds;
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void* mBuffer;
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unsigned int mVertexCount;
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unsigned int mByteCount;
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Mode mMode;
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void* mReallocBuffer; // used for multi-allocation
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void (*mCleanupMethod)(void*);
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};
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}; // namespace uirenderer
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}; // namespace android
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#endif // ANDROID_HWUI_VERTEX_BUFFER_H
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