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 28 // GL Extensions that are dynamically looked up at runtime 29 static PFNGLMAPBUFFEROESPROC GLMapBufferOES = NULL; 30 static PFNGLUNMAPBUFFEROESPROC GLUnmapBufferOES = NULL; 31 32 VertexFrame::VertexFrame(int size) 33 : vbo_(0), 34 size_(size) { 35 } 36 37 VertexFrame::~VertexFrame() { 38 glDeleteBuffers(1, &vbo_); 39 } 40 41 bool VertexFrame::CreateBuffer() { 42 glGenBuffers(1, &vbo_); 43 return !GLEnv::CheckGLError("Generating VBO"); 44 } 45 46 bool VertexFrame::WriteData(const uint8_t* data, int size) { 47 // Create buffer if not created already 48 const bool first_upload = !HasVBO(); 49 if (first_upload && !CreateBuffer()) { 50 ALOGE("VertexFrame: Could not create vertex buffer!"); 51 return false; 52 } 53 54 // Upload the data 55 glBindBuffer(GL_ARRAY_BUFFER, vbo_); 56 if (GLEnv::CheckGLError("VBO Bind Buffer")) 57 return false; 58 59 if (first_upload && size == size_) 60 glBufferData(GL_ARRAY_BUFFER, size, data, GL_STATIC_DRAW); 61 else if (!first_upload && size <= size_) 62 glBufferSubData(GL_ARRAY_BUFFER, 0, size, data); 63 else { 64 ALOGE("VertexFrame: Attempting to upload more data (%d bytes) than fits " 65 "inside the vertex frame (%d bytes)!", size, size_); 66 return false; 67 } 68 69 // Make sure it worked 70 if (GLEnv::CheckGLError("VBO Data Upload")) 71 return false; 72 73 // Subsequent uploads are now bound to the size given here 74 size_ = size; 75 76 return true; 77 } 78 79 int VertexFrame::Size() const { 80 return size_; 81 } 82 83 } // namespace filterfw 84 } // namespace android 85
