aa4041f70a
Performs range checking on the inputs to Mesh::Mesh() before allocating
the storage array.
Bug: 20674682
Change-Id: I4fc918a8c312d967dd6d9f91a098b2e0a7081027
(cherry picked from commit ab79e33ef3)
100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
/*
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* Copyright 2013 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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#include "Mesh.h"
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#include <utils/Log.h>
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namespace android {
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Mesh::Mesh(Primitive primitive, size_t vertexCount, size_t vertexSize, size_t texCoordSize)
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: mVertexCount(vertexCount), mVertexSize(vertexSize), mTexCoordsSize(texCoordSize),
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mPrimitive(primitive)
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{
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if (vertexCount == 0) {
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mVertices = new float[1];
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mVertices[0] = 0.0f;
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mStride = 0;
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return;
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}
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size_t stride = vertexSize + texCoordSize;
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size_t remainder = (stride * vertexCount) / vertexCount;
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// Since all of the input parameters are unsigned, if stride is less than
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// either vertexSize or texCoordSize, it must have overflowed. remainder
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// will be equal to stride as long as stride * vertexCount doesn't overflow.
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if ((stride < vertexSize) || (remainder != stride)) {
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ALOGE("Overflow in Mesh(..., %zu, %zu, %zu)", vertexCount, vertexSize,
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texCoordSize);
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mVertices = new float[1];
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mVertices[0] = 0.0f;
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mVertexCount = 0;
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mVertexSize = 0;
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mTexCoordsSize = 0;
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mStride = 0;
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return;
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}
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mVertices = new float[stride * vertexCount];
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mStride = stride;
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}
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Mesh::~Mesh() {
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delete [] mVertices;
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}
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Mesh::Primitive Mesh::getPrimitive() const {
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return mPrimitive;
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}
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float const* Mesh::getPositions() const {
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return mVertices;
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}
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float* Mesh::getPositions() {
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return mVertices;
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}
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float const* Mesh::getTexCoords() const {
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return mVertices + mVertexSize;
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}
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float* Mesh::getTexCoords() {
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return mVertices + mVertexSize;
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}
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size_t Mesh::getVertexCount() const {
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return mVertexCount;
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}
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size_t Mesh::getVertexSize() const {
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return mVertexSize;
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}
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size_t Mesh::getTexCoordsSize() const {
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return mTexCoordsSize;
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}
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size_t Mesh::getByteStride() const {
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return mStride*sizeof(float);
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}
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size_t Mesh::getStride() const {
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return mStride;
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}
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} /* namespace android */
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