| /* |
| * Copyright 2017 Google Inc. All Rights Reserved. |
| * |
| * 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 C_ARCORE_HELLO_AR_BACKGROUND_RENDERER_H_ |
| #define C_ARCORE_HELLO_AR_BACKGROUND_RENDERER_H_ |
| |
| #include <GLES2/gl2.h> |
| #include <GLES2/gl2ext.h> |
| #include <cstdlib> |
| |
| #include "arcore_c_api.h" |
| #include "platform_tools/android/apps/arcore/src/main/cpp/util.h" |
| |
| namespace hello_ar { |
| |
| // This class renders the passthrough camera image into the OpenGL frame. |
| class BackgroundRenderer { |
| public: |
| BackgroundRenderer() = default; |
| |
| ~BackgroundRenderer() = default; |
| |
| // Sets up OpenGL state. Must be called on the OpenGL thread and before any |
| // other methods below. |
| void InitializeGlContent(); |
| |
| // Draws the background image. This methods must be called for every ArFrame |
| // returned by ArSession_update() to catch display geometry change events. |
| void Draw(const ArSession *session, const ArFrame *frame); |
| |
| // Returns the generated texture name for the GL_TEXTURE_EXTERNAL_OES target. |
| GLuint GetTextureId() const; |
| |
| private: |
| static constexpr int kNumVertices = 4; |
| |
| GLuint shader_program_; |
| GLuint texture_id_; |
| |
| GLuint attribute_vertices_; |
| GLuint attribute_uvs_; |
| GLuint uniform_texture_; |
| |
| float transformed_uvs_[kNumVertices * 2]; |
| bool uvs_initialized_ = false; |
| }; |
| } // namespace hello_ar |
| #endif // C_ARCORE_HELLO_AR_BACKGROUND_RENDERER_H_ |