1 /*
2 * Copyright (C) 2011 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27
28 #if USE(ACCELERATED_COMPOSITING)
29
30 #include "cc/CCVideoLayerImpl.h"
31
32 #include "GraphicsContext3D.h"
33 #include "LayerRendererChromium.h"
34 #include "NotImplemented.h"
35 #include "VideoLayerChromium.h"
36 #include <wtf/text/WTFString.h>
37
38 namespace WebCore {
39
40 // These values are magic numbers that are used in the transformation
41 // from YUV to RGB color values.
42 // They are taken from the following webpage:
43 // http://www.fourcc.org/fccyvrgb.php
44 const float CCVideoLayerImpl::yuv2RGB[9] = {
45 1.164f, 1.164f, 1.164f,
46 0.f, -.391f, 2.018f,
47 1.596f, -.813f, 0.f,
48 };
49
50 // These values map to 16, 128, and 128 respectively, and are computed
51 // as a fraction over 256 (e.g. 16 / 256 = 0.0625).
52 // They are used in the YUV to RGBA conversion formula:
53 // Y - 16 : Gives 16 values of head and footroom for overshooting
54 // U - 128 : Turns unsigned U into signed U [-128,127]
55 // V - 128 : Turns unsigned V into signed V [-128,127]
56 const float CCVideoLayerImpl::yuvAdjust[3] = {
57 -0.0625f,
58 -0.5f,
59 -0.5f,
60 };
61
CCVideoLayerImpl(LayerChromium * owner)62 CCVideoLayerImpl::CCVideoLayerImpl(LayerChromium* owner)
63 : CCLayerImpl(owner)
64 {
65 }
66
~CCVideoLayerImpl()67 CCVideoLayerImpl::~CCVideoLayerImpl()
68 {
69 cleanupResources();
70 }
71
setTexture(size_t i,VideoLayerChromium::Texture texture)72 void CCVideoLayerImpl::setTexture(size_t i, VideoLayerChromium::Texture texture)
73 {
74 ASSERT(i < 3);
75 m_textures[i] = texture;
76 }
77
draw(const IntRect &)78 void CCVideoLayerImpl::draw(const IntRect&)
79 {
80 if (m_skipsDraw)
81 return;
82
83 ASSERT(layerRenderer());
84 const RGBAProgram* rgbaProgram = layerRenderer()->videoLayerRGBAProgram();
85 ASSERT(rgbaProgram && rgbaProgram->initialized());
86 const YUVProgram* yuvProgram = layerRenderer()->videoLayerYUVProgram();
87 ASSERT(yuvProgram && yuvProgram->initialized());
88
89 switch (m_frameFormat) {
90 case VideoFrameChromium::YV12:
91 case VideoFrameChromium::YV16:
92 drawYUV(yuvProgram);
93 break;
94 case VideoFrameChromium::RGBA:
95 drawRGBA(rgbaProgram);
96 break;
97 default:
98 // FIXME: Implement other paths.
99 notImplemented();
100 break;
101 }
102 }
103
drawYUV(const CCVideoLayerImpl::YUVProgram * program) const104 void CCVideoLayerImpl::drawYUV(const CCVideoLayerImpl::YUVProgram* program) const
105 {
106 GraphicsContext3D* context = layerRenderer()->context();
107 VideoLayerChromium::Texture yTexture = m_textures[VideoFrameChromium::yPlane];
108 VideoLayerChromium::Texture uTexture = m_textures[VideoFrameChromium::uPlane];
109 VideoLayerChromium::Texture vTexture = m_textures[VideoFrameChromium::vPlane];
110
111 GLC(context, context->activeTexture(GraphicsContext3D::TEXTURE1));
112 GLC(context, context->bindTexture(GraphicsContext3D::TEXTURE_2D, yTexture.id));
113 GLC(context, context->activeTexture(GraphicsContext3D::TEXTURE2));
114 GLC(context, context->bindTexture(GraphicsContext3D::TEXTURE_2D, uTexture.id));
115 GLC(context, context->activeTexture(GraphicsContext3D::TEXTURE3));
116 GLC(context, context->bindTexture(GraphicsContext3D::TEXTURE_2D, vTexture.id));
117
118 layerRenderer()->useShader(program->program());
119
120 float yWidthScaleFactor = static_cast<float>(yTexture.visibleSize.width()) / yTexture.size.width();
121 // Arbitrarily take the u sizes because u and v dimensions are identical.
122 float uvWidthScaleFactor = static_cast<float>(uTexture.visibleSize.width()) / uTexture.size.width();
123 GLC(context, context->uniform1f(program->vertexShader().yWidthScaleFactorLocation(), yWidthScaleFactor));
124 GLC(context, context->uniform1f(program->vertexShader().uvWidthScaleFactorLocation(), uvWidthScaleFactor));
125
126 GLC(context, context->uniform1i(program->fragmentShader().yTextureLocation(), 1));
127 GLC(context, context->uniform1i(program->fragmentShader().uTextureLocation(), 2));
128 GLC(context, context->uniform1i(program->fragmentShader().vTextureLocation(), 3));
129
130 GLC(context, context->uniformMatrix3fv(program->fragmentShader().ccMatrixLocation(), 0, const_cast<float*>(yuv2RGB), 1));
131 GLC(context, context->uniform3fv(program->fragmentShader().yuvAdjLocation(), const_cast<float*>(yuvAdjust), 1));
132
133 LayerChromium::drawTexturedQuad(context, layerRenderer()->projectionMatrix(), drawTransform(),
134 bounds().width(), bounds().height(), drawOpacity(),
135 program->vertexShader().matrixLocation(),
136 program->fragmentShader().alphaLocation());
137
138 // Reset active texture back to texture 0.
139 GLC(context, context->activeTexture(GraphicsContext3D::TEXTURE0));
140 }
141
drawRGBA(const CCVideoLayerImpl::RGBAProgram * program) const142 void CCVideoLayerImpl::drawRGBA(const CCVideoLayerImpl::RGBAProgram* program) const
143 {
144 GraphicsContext3D* context = layerRenderer()->context();
145 VideoLayerChromium::Texture texture = m_textures[VideoFrameChromium::rgbPlane];
146
147 GLC(context, context->activeTexture(GraphicsContext3D::TEXTURE0));
148 GLC(context, context->bindTexture(GraphicsContext3D::TEXTURE_2D, texture.id));
149
150 layerRenderer()->useShader(program->program());
151 float widthScaleFactor = static_cast<float>(texture.visibleSize.width()) / texture.size.width();
152 GLC(context, context->uniform4f(program->vertexShader().texTransformLocation(), 0, 0, widthScaleFactor, 1));
153
154 GLC(context, context->uniform1i(program->fragmentShader().samplerLocation(), 0));
155
156 LayerChromium::drawTexturedQuad(context, layerRenderer()->projectionMatrix(), drawTransform(),
157 bounds().width(), bounds().height(), drawOpacity(),
158 program->vertexShader().matrixLocation(),
159 program->fragmentShader().alphaLocation());
160 }
161
162
dumpLayerProperties(TextStream & ts,int indent) const163 void CCVideoLayerImpl::dumpLayerProperties(TextStream& ts, int indent) const
164 {
165 writeIndent(ts, indent);
166 ts << "video layer\n";
167 CCLayerImpl::dumpLayerProperties(ts, indent);
168 }
169
170 }
171
172 #endif // USE(ACCELERATED_COMPOSITING)
173