1 /* 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef WEBRTC_MODULES_VIDEO_RENDER_IOS_OPEN_GLES20_H_ 12 #define WEBRTC_MODULES_VIDEO_RENDER_IOS_OPEN_GLES20_H_ 13 14 #include <OpenGLES/ES2/glext.h> 15 16 #include "webrtc/modules/video_render/video_render_defines.h" 17 18 /* 19 * This OpenGles20 is the class of renderer for VideoFrame into a GLES 2.0 20 * windows used in the VideoRenderIosView class. 21 */ 22 namespace webrtc { 23 class OpenGles20 { 24 public: 25 OpenGles20(); 26 ~OpenGles20(); 27 28 bool Setup(int32_t width, int32_t height); 29 bool Render(const VideoFrame& frame); 30 31 // SetCoordinates 32 // Sets the coordinates where the stream shall be rendered. 33 // Values must be between 0 and 1. 34 bool SetCoordinates(const float z_order, 35 const float left, 36 const float top, 37 const float right, 38 const float bottom); 39 40 private: 41 // Compile and load the vertex and fragment shaders defined at the top of 42 // open_gles20.mm 43 GLuint LoadShader(GLenum shader_type, const char* shader_source); 44 45 GLuint CreateProgram(const char* vertex_source, const char* fragment_source); 46 47 // Initialize the textures by the frame width and height 48 void SetupTextures(const VideoFrame& frame); 49 50 // Update the textures by the YUV data from the frame 51 void UpdateTextures(const VideoFrame& frame); 52 53 GLuint texture_ids_[3]; // Texture id of Y,U and V texture. 54 GLuint program_; 55 GLsizei texture_width_; 56 GLsizei texture_height_; 57 58 GLfloat vertices_[20]; 59 static const char indices_[]; 60 static const char vertext_shader_[]; 61 static const char fragment_shader_[]; 62 }; 63 } // namespace webrtc 64 #endif // WEBRTC_MODULES_VIDEO_RENDER_IOS_OPEN_GLES20_H_ 65
