1 /*
2 * Copyright 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <renderengine/Mesh.h>
18
19 #include <utils/Log.h>
20
21 namespace android {
22 namespace renderengine {
23
Mesh(Primitive primitive,size_t vertexCount,size_t vertexSize,size_t texCoordSize)24 Mesh::Mesh(Primitive primitive, size_t vertexCount, size_t vertexSize, size_t texCoordSize)
25 : mVertexCount(vertexCount),
26 mVertexSize(vertexSize),
27 mTexCoordsSize(texCoordSize),
28 mPrimitive(primitive) {
29 if (vertexCount == 0) {
30 mVertices.resize(1);
31 mVertices[0] = 0.0f;
32 mStride = 0;
33 return;
34 }
35
36 const size_t CROP_COORD_SIZE = 2;
37 size_t stride = vertexSize + texCoordSize + CROP_COORD_SIZE;
38 size_t remainder = (stride * vertexCount) / vertexCount;
39 // Since all of the input parameters are unsigned, if stride is less than
40 // either vertexSize or texCoordSize, it must have overflowed. remainder
41 // will be equal to stride as long as stride * vertexCount doesn't overflow.
42 if ((stride < vertexSize) || (remainder != stride)) {
43 ALOGE("Overflow in Mesh(..., %zu, %zu, %zu, %zu)", vertexCount, vertexSize, texCoordSize,
44 CROP_COORD_SIZE);
45 mVertices.resize(1);
46 mVertices[0] = 0.0f;
47 mVertexCount = 0;
48 mVertexSize = 0;
49 mTexCoordsSize = 0;
50 mStride = 0;
51 return;
52 }
53
54 mVertices.resize(stride * vertexCount);
55 mStride = stride;
56 }
57
getPrimitive() const58 Mesh::Primitive Mesh::getPrimitive() const {
59 return mPrimitive;
60 }
61
getPositions() const62 float const* Mesh::getPositions() const {
63 return mVertices.data();
64 }
getPositions()65 float* Mesh::getPositions() {
66 return mVertices.data();
67 }
68
getTexCoords() const69 float const* Mesh::getTexCoords() const {
70 return mVertices.data() + mVertexSize;
71 }
getTexCoords()72 float* Mesh::getTexCoords() {
73 return mVertices.data() + mVertexSize;
74 }
75
getCropCoords() const76 float const* Mesh::getCropCoords() const {
77 return mVertices.data() + mVertexSize + mTexCoordsSize;
78 }
getCropCoords()79 float* Mesh::getCropCoords() {
80 return mVertices.data() + mVertexSize + mTexCoordsSize;
81 }
82
getVertexCount() const83 size_t Mesh::getVertexCount() const {
84 return mVertexCount;
85 }
86
getVertexSize() const87 size_t Mesh::getVertexSize() const {
88 return mVertexSize;
89 }
90
getTexCoordsSize() const91 size_t Mesh::getTexCoordsSize() const {
92 return mTexCoordsSize;
93 }
94
getByteStride() const95 size_t Mesh::getByteStride() const {
96 return mStride * sizeof(float);
97 }
98
getStride() const99 size_t Mesh::getStride() const {
100 return mStride;
101 }
102
103 } // namespace renderengine
104 } // namespace android
105