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39
40 #include "display_gl_output_surface.h"
41
42 #include "compositor_resource_fence.h"
43 #include "render_widget_host_view_qt_delegate.h"
44 #include "type_conversion.h"
45
46 #include <QOpenGLFunctions>
47 #include <QSGImageNode>
48 #include <QSGTexture>
49
50 namespace QtWebEngineCore {
51
52 class DisplayGLOutputSurface::Texture final : public QSGTexture
53 {
54 public:
Texture(uint32_t id,QSize sizeInPixels,bool hasAlphaChannel,scoped_refptr<CompositorResourceFence> fence)55 Texture(uint32_t id, QSize sizeInPixels, bool hasAlphaChannel, scoped_refptr<CompositorResourceFence> fence)
56 : m_id(id)
57 , m_sizeInPixels(sizeInPixels)
58 , m_hasAlphaChannel(hasAlphaChannel)
59 , m_fence(std::move(fence))
60 {
61 }
62
63 // QSGTexture:
textureId() const64 int textureId() const override { return m_id; }
textureSize() const65 QSize textureSize() const override { return m_sizeInPixels; }
hasAlphaChannel() const66 bool hasAlphaChannel() const override { return m_hasAlphaChannel; }
hasMipmaps() const67 bool hasMipmaps() const override { return false; }
bind()68 void bind() override
69 {
70 if (m_fence) {
71 m_fence->wait();
72 m_fence.reset();
73 }
74
75 QOpenGLContext *context = QOpenGLContext::currentContext();
76 QOpenGLFunctions *funcs = context->functions();
77 funcs->glBindTexture(GL_TEXTURE_2D, m_id);
78 }
79
80 private:
81 uint32_t m_id;
82 QSize m_sizeInPixels;
83 bool m_hasAlphaChannel;
84 scoped_refptr<CompositorResourceFence> m_fence;
85 };
86
updatePaintNode(QSGNode * oldNode,RenderWidgetHostViewQtDelegate * delegate)87 QSGNode *DisplayGLOutputSurface::updatePaintNode(QSGNode *oldNode, RenderWidgetHostViewQtDelegate *delegate)
88 {
89 {
90 QMutexLocker locker(&m_mutex);
91 if (m_readyToUpdate) {
92 std::swap(m_middleBuffer, m_frontBuffer);
93 m_taskRunner->PostTask(
94 FROM_HERE,
95 base::BindOnce(&DisplayGLOutputSurface::swapBuffersOnVizThread, base::Unretained(this)));
96 m_taskRunner.reset();
97 m_readyToUpdate = false;
98 }
99 }
100
101 if (!m_frontBuffer)
102 return oldNode;
103
104 auto node = static_cast<QSGImageNode *>(oldNode);
105 if (!node)
106 node = delegate->createImageNode();
107
108 QSize sizeInPixels = toQt(m_frontBuffer->shape.sizeInPixels);
109 QSizeF sizeInDips = QSizeF(sizeInPixels) / m_frontBuffer->shape.devicePixelRatio;
110 QRectF rectInDips(QPointF(0, 0), sizeInDips);
111 node->setRect(rectInDips);
112 node->setOwnsTexture(true);
113 node->setTexture(new Texture(m_frontBuffer->serviceId,
114 sizeInPixels,
115 m_frontBuffer->shape.hasAlpha,
116 m_frontBuffer->fence));
117 node->setTextureCoordinatesTransform(QSGImageNode::MirrorVertically);
118
119 return node;
120 }
121
122 } // namespace QtWebEngineCore
123