1 /*
2 * Copyright (C) 2011 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 "base/logging.h"
18
19 #include "core/gl_env.h"
20 #include "core/vertex_frame.h"
21
22 #include <GLES2/gl2ext.h>
23 #include <EGL/egl.h>
24
25 namespace android {
26 namespace filterfw {
27
VertexFrame(int size)28 VertexFrame::VertexFrame(int size)
29 : vbo_(0),
30 size_(size) {
31 }
32
~VertexFrame()33 VertexFrame::~VertexFrame() {
34 glDeleteBuffers(1, &vbo_);
35 }
36
CreateBuffer()37 bool VertexFrame::CreateBuffer() {
38 glGenBuffers(1, &vbo_);
39 return !GLEnv::CheckGLError("Generating VBO");
40 }
41
WriteData(const uint8_t * data,int size)42 bool VertexFrame::WriteData(const uint8_t* data, int size) {
43 // Create buffer if not created already
44 const bool first_upload = !HasVBO();
45 if (first_upload && !CreateBuffer()) {
46 ALOGE("VertexFrame: Could not create vertex buffer!");
47 return false;
48 }
49
50 // Upload the data
51 glBindBuffer(GL_ARRAY_BUFFER, vbo_);
52 if (GLEnv::CheckGLError("VBO Bind Buffer"))
53 return false;
54
55 if (first_upload && size == size_)
56 glBufferData(GL_ARRAY_BUFFER, size, data, GL_STATIC_DRAW);
57 else if (!first_upload && size <= size_)
58 glBufferSubData(GL_ARRAY_BUFFER, 0, size, data);
59 else {
60 ALOGE("VertexFrame: Attempting to upload more data (%d bytes) than fits "
61 "inside the vertex frame (%d bytes)!", size, size_);
62 return false;
63 }
64
65 // Make sure it worked
66 if (GLEnv::CheckGLError("VBO Data Upload"))
67 return false;
68
69 // Subsequent uploads are now bound to the size given here
70 size_ = size;
71
72 return true;
73 }
74
Size() const75 int VertexFrame::Size() const {
76 return size_;
77 }
78
79 } // namespace filterfw
80 } // namespace android
81