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39
40#include "renderqueue_p.h"
41#include <renderview_p.h>
42#include <QThread>
43
44QT_BEGIN_NAMESPACE
45
46namespace Qt3DRender {
47
48namespace Render {
49
50namespace OpenGL {
51
52RenderQueue::RenderQueue()
53 : m_noRender(false)
54 , m_wasReset(true)
55 , m_targetRenderViewCount(0)
56 , m_currentRenderViewCount(0)
57 , m_currentWorkQueue(1)
58{
59}
60
61int RenderQueue::currentRenderViewCount() const
62{
63 return m_currentRenderViewCount;
64}
65
66/*
67 * In case the framegraph changed or when the current number of render queue
68 * needs to be reset.
69 */
70void RenderQueue::reset()
71{
72 m_currentRenderViewCount = 0;
73 m_targetRenderViewCount = 0;
74 m_currentWorkQueue.clear();
75 m_noRender = false;
76 m_wasReset = true;
77}
78
79void RenderQueue::setNoRender()
80{
81 Q_ASSERT(m_targetRenderViewCount == 0);
82 m_noRender = true;
83}
84
85/*
86 * Queue up a RenderView for the frame being built.
87 * Thread safe as this is called from the renderer which is locked.
88 * Returns true if the renderView is complete
89 */
90bool RenderQueue::queueRenderView(RenderView *renderView, uint submissionOrderIndex)
91{
92 Q_ASSERT(!m_noRender);
93 m_currentWorkQueue[submissionOrderIndex] = renderView;
94 ++m_currentRenderViewCount;
95 Q_ASSERT(m_currentRenderViewCount <= m_targetRenderViewCount);
96 return isFrameQueueComplete();
97}
98
99/*
100 * Called by the Rendering Thread to retrieve the a frame queue to render.
101 * A call to reset is required after rendering of the frame. Otherwise under some
102 * conditions the current but then invalidated frame queue could be reused.
103 */
104QVector<RenderView *> RenderQueue::nextFrameQueue()
105{
106 return m_currentWorkQueue;
107}
108
109/*
110 * Sets the number \a targetRenderViewCount of RenderView objects that make up a frame.
111 */
112void RenderQueue::setTargetRenderViewCount(int targetRenderViewCount)
113{
114 Q_ASSERT(!m_noRender);
115 m_targetRenderViewCount = targetRenderViewCount;
116 m_currentWorkQueue.resize(asize: targetRenderViewCount);
117 m_wasReset = false;
118}
119
120/*
121 * Returns true if all the RenderView objects making up the current frame have been queued.
122 * Returns false otherwise.
123 * \note a frameQueue or size 0 is considered incomplete.
124 */
125bool RenderQueue::isFrameQueueComplete() const
126{
127 return (m_noRender
128 || (m_targetRenderViewCount > 0 && m_targetRenderViewCount == m_currentRenderViewCount));
129}
130
131} // namespace OpenGL
132
133} // namespace Render
134
135} // namespace Qt3DRender
136
137QT_END_NAMESPACE
138

source code of qt3d/src/plugins/renderers/opengl/renderer/renderqueue.cpp