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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.
*/
#include "test/gl/gl_renderer.h"
#include <string.h>
#include "common_video/libyuv/include/webrtc_libyuv.h"
#include "rtc_base/checks.h"
namespace webrtc {
namespace test {
GlRenderer::GlRenderer()
: is_init_(false), buffer_(NULL), width_(0), height_(0) {}
void GlRenderer::Init() {
RTC_DCHECK(!is_init_);
is_init_ = true;
glGenTextures(1, &texture_);
}
void GlRenderer::Destroy() {
if (!is_init_) {
return;
}
is_init_ = false;
delete[] buffer_;
buffer_ = NULL;
glDeleteTextures(1, &texture_);
}
void GlRenderer::ResizeViewport(size_t width, size_t height) {
// TODO(pbos): Aspect ratio, letterbox the video.
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glOrtho(0.0f, 1.0f, 1.0f, 0.0f, -1.0f, 1.0f);
glMatrixMode(GL_MODELVIEW);
}
void GlRenderer::ResizeVideo(size_t width, size_t height) {
RTC_DCHECK(is_init_);
width_ = width;
height_ = height;
buffer_size_ = width * height * 4; // BGRA
delete[] buffer_;
buffer_ = new uint8_t[buffer_size_];
RTC_DCHECK(buffer_);
memset(buffer_, 0, buffer_size_);
glBindTexture(GL_TEXTURE_2D, texture_);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8, static_cast<GLvoid*>(buffer_));
}
void GlRenderer::OnFrame(const webrtc::VideoFrame& frame) {
RTC_DCHECK(is_init_);
if (static_cast<size_t>(frame.width()) != width_ ||
static_cast<size_t>(frame.height()) != height_) {
ResizeVideo(frame.width(), frame.height());
}
webrtc::ConvertFromI420(frame, VideoType::kBGRA, 0, buffer_);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, texture_);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width_, height_, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8, buffer_);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glBegin(GL_QUADS);
{
glTexCoord2f(0.0f, 0.0f);
glVertex3f(0.0f, 0.0f, 0.0f);
glTexCoord2f(0.0f, 1.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
glTexCoord2f(1.0f, 1.0f);
glVertex3f(1.0f, 1.0f, 0.0f);
glTexCoord2f(1.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 0.0f);
}
glEnd();
glBindTexture(GL_TEXTURE_2D, 0);
glFlush();
}
} // namespace test
} // namespace webrtc
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