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/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_MODULES_VIDEO_RENDER_IOS_OPEN_GLES20_H_
#define WEBRTC_MODULES_VIDEO_RENDER_IOS_OPEN_GLES20_H_
#include <OpenGLES/ES2/glext.h>
#include "webrtc/modules/video_render/include/video_render_defines.h"
/*
* This OpenGles20 is the class of renderer for VideoFrame into a GLES 2.0
* windows used in the VideoRenderIosView class.
*/
namespace webrtc {
class OpenGles20 {
public:
OpenGles20();
~OpenGles20();
bool Setup(int32_t width, int32_t height);
bool Render(const VideoFrame& frame);
// SetCoordinates
// Sets the coordinates where the stream shall be rendered.
// Values must be between 0 and 1.
bool SetCoordinates(const float z_order,
const float left,
const float top,
const float right,
const float bottom);
private:
// Compile and load the vertex and fragment shaders defined at the top of
// open_gles20.mm
GLuint LoadShader(GLenum shader_type, const char* shader_source);
GLuint CreateProgram(const char* vertex_source, const char* fragment_source);
// Initialize the textures by the frame width and height
void SetupTextures(const VideoFrame& frame);
// Update the textures by the YUV data from the frame
void UpdateTextures(const VideoFrame& frame);
GLuint texture_ids_[3]; // Texture id of Y,U and V texture.
GLuint program_;
GLsizei texture_width_;
GLsizei texture_height_;
GLfloat vertices_[20];
static const char indices_[];
static const char vertext_shader_[];
static const char fragment_shader_[];
};
} // namespace webrtc
#endif // WEBRTC_MODULES_VIDEO_RENDER_IOS_OPEN_GLES20_H_
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