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/*
* Copyright 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <renderengine/Mesh.h>
#include <utils/Log.h>
namespace android {
namespace renderengine {
Mesh::Mesh(Primitive primitive, size_t vertexCount, size_t vertexSize, size_t texCoordSize)
: mVertexCount(vertexCount),
mVertexSize(vertexSize),
mTexCoordsSize(texCoordSize),
mPrimitive(primitive) {
if (vertexCount == 0) {
mVertices.resize(1);
mVertices[0] = 0.0f;
mStride = 0;
return;
}
const size_t CROP_COORD_SIZE = 2;
size_t stride = vertexSize + texCoordSize + CROP_COORD_SIZE;
size_t remainder = (stride * vertexCount) / vertexCount;
// Since all of the input parameters are unsigned, if stride is less than
// either vertexSize or texCoordSize, it must have overflowed. remainder
// will be equal to stride as long as stride * vertexCount doesn't overflow.
if ((stride < vertexSize) || (remainder != stride)) {
ALOGE("Overflow in Mesh(..., %zu, %zu, %zu, %zu)", vertexCount, vertexSize, texCoordSize,
CROP_COORD_SIZE);
mVertices.resize(1);
mVertices[0] = 0.0f;
mVertexCount = 0;
mVertexSize = 0;
mTexCoordsSize = 0;
mStride = 0;
return;
}
mVertices.resize(stride * vertexCount);
mStride = stride;
}
Mesh::Primitive Mesh::getPrimitive() const {
return mPrimitive;
}
float const* Mesh::getPositions() const {
return mVertices.data();
}
float* Mesh::getPositions() {
return mVertices.data();
}
float const* Mesh::getTexCoords() const {
return mVertices.data() + mVertexSize;
}
float* Mesh::getTexCoords() {
return mVertices.data() + mVertexSize;
}
float const* Mesh::getCropCoords() const {
return mVertices.data() + mVertexSize + mTexCoordsSize;
}
float* Mesh::getCropCoords() {
return mVertices.data() + mVertexSize + mTexCoordsSize;
}
size_t Mesh::getVertexCount() const {
return mVertexCount;
}
size_t Mesh::getVertexSize() const {
return mVertexSize;
}
size_t Mesh::getTexCoordsSize() const {
return mTexCoordsSize;
}
size_t Mesh::getByteStride() const {
return mStride * sizeof(float);
}
size_t Mesh::getStride() const {
return mStride;
}
} // namespace renderengine
} // namespace android
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