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 "test/gl/gl_renderer.h"
12
13 #include <string.h>
14
15 #include "common_video/libyuv/include/webrtc_libyuv.h"
16 #include "rtc_base/checks.h"
17
18 namespace webrtc {
19 namespace test {
20
GlRenderer()21 GlRenderer::GlRenderer()
22 : is_init_(false), buffer_(NULL), width_(0), height_(0) {}
23
Init()24 void GlRenderer::Init() {
25 RTC_DCHECK(!is_init_);
26 is_init_ = true;
27
28 glGenTextures(1, &texture_);
29 }
30
Destroy()31 void GlRenderer::Destroy() {
32 if (!is_init_) {
33 return;
34 }
35
36 is_init_ = false;
37
38 delete[] buffer_;
39 buffer_ = NULL;
40
41 glDeleteTextures(1, &texture_);
42 }
43
ResizeViewport(size_t width,size_t height)44 void GlRenderer::ResizeViewport(size_t width, size_t height) {
45 // TODO(pbos): Aspect ratio, letterbox the video.
46 glViewport(0, 0, width, height);
47
48 glMatrixMode(GL_PROJECTION);
49 glLoadIdentity();
50 glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
51 glOrtho(0.0f, 1.0f, 1.0f, 0.0f, -1.0f, 1.0f);
52 glMatrixMode(GL_MODELVIEW);
53 }
54
ResizeVideo(size_t width,size_t height)55 void GlRenderer::ResizeVideo(size_t width, size_t height) {
56 RTC_DCHECK(is_init_);
57 width_ = width;
58 height_ = height;
59
60 buffer_size_ = width * height * 4; // BGRA
61
62 delete[] buffer_;
63 buffer_ = new uint8_t[buffer_size_];
64 RTC_DCHECK(buffer_);
65 memset(buffer_, 0, buffer_size_);
66 glBindTexture(GL_TEXTURE_2D, texture_);
67 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
68 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
69 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_BGRA,
70 GL_UNSIGNED_INT_8_8_8_8, static_cast<GLvoid*>(buffer_));
71 }
72
OnFrame(const webrtc::VideoFrame & frame)73 void GlRenderer::OnFrame(const webrtc::VideoFrame& frame) {
74 RTC_DCHECK(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, VideoType::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 } // namespace test
112 } // namespace webrtc
113