| /* |
| * 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 "Mesh.h" |
| |
| #include <utils/Log.h> |
| |
| namespace android { |
| |
| 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 = new float[1]; |
| mVertices[0] = 0.0f; |
| mStride = 0; |
| return; |
| } |
| |
| size_t stride = vertexSize + texCoordSize; |
| 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)", vertexCount, vertexSize, |
| texCoordSize); |
| mVertices = new float[1]; |
| mVertices[0] = 0.0f; |
| mVertexCount = 0; |
| mVertexSize = 0; |
| mTexCoordsSize = 0; |
| mStride = 0; |
| return; |
| } |
| |
| mVertices = new float[stride * vertexCount]; |
| mStride = stride; |
| } |
| |
| Mesh::~Mesh() { |
| delete [] mVertices; |
| } |
| |
| Mesh::Primitive Mesh::getPrimitive() const { |
| return mPrimitive; |
| } |
| |
| |
| float const* Mesh::getPositions() const { |
| return mVertices; |
| } |
| float* Mesh::getPositions() { |
| return mVertices; |
| } |
| |
| float const* Mesh::getTexCoords() const { |
| return mVertices + mVertexSize; |
| } |
| float* Mesh::getTexCoords() { |
| return mVertices + mVertexSize; |
| } |
| |
| |
| 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 android */ |