| /* |
| * Copyright (C) 2011 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. |
| */ |
| |
| #ifndef ANDROID_FILTERFW_CORE_VERTEXFRAME_H |
| #define ANDROID_FILTERFW_CORE_VERTEXFRAME_H |
| |
| #include <GLES2/gl2.h> |
| |
| namespace android { |
| namespace filterfw { |
| |
| // A VertexFrame stores vertex attribute data in a VBO. Unlike other frames, |
| // you often create instances of VertexFrame yourself, to pass vertex data to |
| // a ShaderProgram. Note, that any kind of reading from VertexFrames is NOT |
| // supported. Once data is uploaded to a VertexFrame, it cannot be read from |
| // again. |
| class VertexFrame { |
| public: |
| // Create a VertexFrame of the specified size (in bytes). |
| explicit VertexFrame(int size); |
| |
| ~VertexFrame(); |
| |
| // Upload the given data to the vertex buffer. The size must match the size |
| // passed in the constructor for the first upload. Subsequent uploads must |
| // be able to fit within the allocated space (i.e. size must not exceed the |
| // frame's size). |
| bool WriteData(const uint8_t* data, int size); |
| |
| // The size of the vertex buffer in bytes. |
| int Size() const; |
| |
| // Return the id of the internal VBO. Returns 0 if no VBO has been |
| // generated yet. The internal VBO is generated the first time data is |
| // uploaded. |
| GLuint GetVboId() const { |
| return vbo_; |
| } |
| |
| // Returns true if the frame contains an allocated VBO. |
| bool HasBuffer() const { |
| return vbo_ != 0; |
| } |
| |
| private: |
| // Create the VBO |
| bool CreateBuffer(); |
| |
| // Returns true if the VBO has been created. |
| bool HasVBO() const { |
| return vbo_ != 0; |
| } |
| |
| // The internal VBO handle |
| GLuint vbo_; |
| |
| // The size of this frame in bytes |
| int size_; |
| }; |
| |
| } // namespace filterfw |
| } // namespace android |
| |
| #endif // ANDROID_FILTERFW_CORE_VERTEXFRAME_H |