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#include "webrtc/test/gl/gl_renderer.h"
12
13#include <string.h>
14
15#include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
16
17namespace webrtc {
18namespace test {
19
20GlRenderer::GlRenderer()
21    : is_init_(false), buffer_(NULL), width_(0), height_(0) {}
22
23void GlRenderer::Init() {
24  assert(!is_init_);
25  is_init_ = true;
26
27  glGenTextures(1, &texture_);
28}
29
30void GlRenderer::Destroy() {
31  if (!is_init_) {
32    return;
33  }
34
35  is_init_ = false;
36
37  delete[] buffer_;
38  buffer_ = NULL;
39
40  glDeleteTextures(1, &texture_);
41}
42
43void GlRenderer::ResizeViewport(size_t width, size_t height) {
44  // TODO(pbos): Aspect ratio, letterbox the video.
45  glViewport(0, 0, width, height);
46
47  glMatrixMode(GL_PROJECTION);
48  glLoadIdentity();
49  glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
50  glOrtho(0.0f, 1.0f, 1.0f, 0.0f, -1.0f, 1.0f);
51  glMatrixMode(GL_MODELVIEW);
52}
53
54void GlRenderer::ResizeVideo(size_t width, size_t height) {
55  assert(is_init_);
56  width_ = width;
57  height_ = height;
58
59  buffer_size_ = width * height * 4;  // BGRA
60
61  delete[] buffer_;
62  buffer_ = new uint8_t[buffer_size_];
63  assert(buffer_ != NULL);
64  memset(buffer_, 0, buffer_size_);
65  glBindTexture(GL_TEXTURE_2D, texture_);
66  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
67  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
68  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_BGRA,
69               GL_UNSIGNED_INT_8_8_8_8, static_cast<GLvoid*>(buffer_));
70}
71
72void GlRenderer::RenderFrame(const webrtc::VideoFrame& frame,
73                             int /*render_delay_ms*/) {
74  assert(is_init_);
75
76  if (static_cast<size_t>(frame.width()) != width_ ||
77      static_cast<size_t>(frame.height()) != height_) {
78    ResizeVideo(frame.width(), frame.height());
79  }
80
81  webrtc::ConvertFromI420(frame, kBGRA, 0, buffer_);
82
83  glEnable(GL_TEXTURE_2D);
84  glBindTexture(GL_TEXTURE_2D, texture_);
85  glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width_, height_, GL_BGRA,
86                  GL_UNSIGNED_INT_8_8_8_8, buffer_);
87
88  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
89
90  glLoadIdentity();
91
92  glBegin(GL_QUADS);
93  {
94    glTexCoord2f(0.0f, 0.0f);
95    glVertex3f(0.0f, 0.0f, 0.0f);
96
97    glTexCoord2f(0.0f, 1.0f);
98    glVertex3f(0.0f, 1.0f, 0.0f);
99
100    glTexCoord2f(1.0f, 1.0f);
101    glVertex3f(1.0f, 1.0f, 0.0f);
102
103    glTexCoord2f(1.0f, 0.0f);
104    glVertex3f(1.0f, 0.0f, 0.0f);
105  }
106  glEnd();
107
108  glBindTexture(GL_TEXTURE_2D, 0);
109  glFlush();
110}
111}  // test
112}  // webrtc
113