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plugins/platforms/x11/standalone/glxbackend.cpp
| Show First 20 Lines • Show All 107 Lines • ▼ Show 20 Line(s) | 106 | GlxBackend::GlxBackend(Display *display) | |||
|---|---|---|---|---|---|
| 108 | , m_overlayWindow(kwinApp()->platform()->createOverlayWindow()) | 108 | , m_overlayWindow(kwinApp()->platform()->createOverlayWindow()) | ||
| 109 | , window(None) | 109 | , window(None) | ||
| 110 | , fbconfig(nullptr) | 110 | , fbconfig(nullptr) | ||
| 111 | , glxWindow(None) | 111 | , glxWindow(None) | ||
| 112 | , ctx(nullptr) | 112 | , ctx(nullptr) | ||
| 113 | , m_bufferAge(0) | 113 | , m_bufferAge(0) | ||
| 114 | , m_x11Display(display) | 114 | , m_x11Display(display) | ||
| 115 | { | 115 | { | ||
| 116 | // Ensures calls to glXSwapBuffers will always block until the next | | |||
| 117 | // retrace when using the proprietary NVIDIA driver. This must be | | |||
| 118 | // set before libGL.so is loaded. | | |||
| 119 | setenv("__GL_MaxFramesAllowed", "1", true); | | |||
| 120 | | ||||
| 121 | // Force initialization of GLX integration in the Qt's xcb backend | 116 | // Force initialization of GLX integration in the Qt's xcb backend | ||
| 122 | // to make it call XESetWireToEvent callbacks, which is required | 117 | // to make it call XESetWireToEvent callbacks, which is required | ||
| 123 | // by Mesa when using DRI2. | 118 | // by Mesa when using DRI2. | ||
| 124 | QOpenGLContext::supportsThreadedOpenGL(); | 119 | QOpenGLContext::supportsThreadedOpenGL(); | ||
| 125 | } | 120 | } | ||
| 126 | 121 | | |||
| 127 | GlxBackend::~GlxBackend() | 122 | GlxBackend::~GlxBackend() | ||
| 128 | { | 123 | { | ||
| ▲ Show 20 Lines • Show All 92 Lines • ▼ Show 20 Line(s) | 165 | { | |||
| 221 | 216 | | |||
| 222 | if (hasExtension(QByteArrayLiteral("GLX_EXT_buffer_age"))) { | 217 | if (hasExtension(QByteArrayLiteral("GLX_EXT_buffer_age"))) { | ||
| 223 | const QByteArray useBufferAge = qgetenv("KWIN_USE_BUFFER_AGE"); | 218 | const QByteArray useBufferAge = qgetenv("KWIN_USE_BUFFER_AGE"); | ||
| 224 | 219 | | |||
| 225 | if (useBufferAge != "0") | 220 | if (useBufferAge != "0") | ||
| 226 | setSupportsBufferAge(true); | 221 | setSupportsBufferAge(true); | ||
| 227 | } | 222 | } | ||
| 228 | 223 | | |||
| 229 | setBlocksForRetrace(true); | | |||
| 230 | | ||||
| 231 | if (m_haveEXTSwapControl) { | 224 | if (m_haveEXTSwapControl) { | ||
| 232 | glXSwapIntervalEXT(display(), glxWindow, 1); | 225 | glXSwapIntervalEXT(display(), glxWindow, 1); | ||
| 233 | } else if (m_haveMESASwapControl) { | 226 | } else if (m_haveMESASwapControl) { | ||
| 234 | glXSwapIntervalMESA(1); | 227 | glXSwapIntervalMESA(1); | ||
| 235 | } else { | 228 | } else { | ||
| 236 | qCWarning(KWIN_X11STANDALONE) << "NO VSYNC! glSwapInterval is not supported"; | 229 | qCWarning(KWIN_X11STANDALONE) << "NO VSYNC! glSwapInterval is not supported"; | ||
| 237 | } | 230 | } | ||
| 238 | 231 | | |||
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| 697 | { | 690 | { | ||
| 698 | return new GlxTexture(texture, this); | 691 | return new GlxTexture(texture, this); | ||
| 699 | } | 692 | } | ||
| 700 | 693 | | |||
| 701 | QRegion GlxBackend::prepareRenderingFrame() | 694 | QRegion GlxBackend::prepareRenderingFrame() | ||
| 702 | { | 695 | { | ||
| 703 | QRegion repaint; | 696 | QRegion repaint; | ||
| 704 | 697 | | |||
| 705 | present(); | | |||
| 706 | | ||||
| 707 | if (supportsBufferAge()) | 698 | if (supportsBufferAge()) | ||
| 708 | repaint = accumulatedDamageHistory(m_bufferAge); | 699 | repaint = accumulatedDamageHistory(m_bufferAge); | ||
| 709 | 700 | | |||
| 710 | startRenderTimer(); | 701 | startRenderTimer(); | ||
| 711 | glXWaitX(); | | |||
| 712 | 702 | | |||
| 713 | return repaint; | 703 | return repaint; | ||
| 714 | } | 704 | } | ||
| 715 | 705 | | |||
| 716 | void GlxBackend::endRenderingFrame(const QRegion &renderedRegion, const QRegion &damagedRegion) | 706 | void GlxBackend::endRenderingFrame(const QRegion &renderedRegion, const QRegion &damagedRegion) | ||
| 717 | { | 707 | { | ||
| 718 | if (damagedRegion.isEmpty()) { | 708 | if (damagedRegion.isEmpty()) { | ||
| 719 | setLastDamage(QRegion()); | 709 | setLastDamage(QRegion()); | ||
| 720 | 710 | | |||
| 721 | // If the damaged region of a window is fully occluded, the only | 711 | // If the damaged region of a window is fully occluded, the only | ||
| 722 | // rendering done, if any, will have been to repair a reused back | 712 | // rendering done, if any, will have been to repair a reused back | ||
| 723 | // buffer, making it identical to the front buffer. | 713 | // buffer, making it identical to the front buffer. | ||
| 724 | // | 714 | // | ||
| 725 | // In this case we won't post the back buffer. Instead we'll just | 715 | // In this case we won't post the back buffer. Instead we'll just | ||
| 726 | // set the buffer age to 1, so the repaired regions won't be | 716 | // set the buffer age to 1, so the repaired regions won't be | ||
| 727 | // rendered again in the next frame. | 717 | // rendered again in the next frame. | ||
| 728 | if (!renderedRegion.isEmpty()) | 718 | if (!renderedRegion.isEmpty()) | ||
| 729 | glFlush(); | 719 | glFlush(); | ||
| 730 | 720 | | |||
| 731 | m_bufferAge = 1; | 721 | m_bufferAge = 1; | ||
| 732 | return; | 722 | return; | ||
| 733 | } | 723 | } | ||
| 734 | 724 | | |||
| 735 | setLastDamage(renderedRegion); | 725 | setLastDamage(renderedRegion); | ||
| 736 | | ||||
| 737 | if (!blocksForRetrace()) { | | |||
| 738 | // This also sets lastDamage to empty which prevents the frame from | | |||
| 739 | // being posted again when prepareRenderingFrame() is called. | | |||
| 740 | present(); | 726 | present(); | ||
| 741 | } else { | | |||
| 742 | // Make sure that the GPU begins processing the command stream | | |||
| 743 | // now and not the next time prepareRenderingFrame() is called. | | |||
| 744 | glFlush(); | | |||
| 745 | } | | |||
| 746 | 727 | | |||
| 747 | if (overlayWindow()->window()) // show the window only after the first pass, | 728 | if (overlayWindow()->window()) // show the window only after the first pass, | ||
| 748 | overlayWindow()->show(); // since that pass may take long | 729 | overlayWindow()->show(); // since that pass may take long | ||
| 749 | 730 | | |||
| 750 | // Save the damaged region to history | 731 | // Save the damaged region to history | ||
| 751 | if (supportsBufferAge()) | 732 | if (supportsBufferAge()) | ||
| 752 | addToDamageHistory(damagedRegion); | 733 | addToDamageHistory(damagedRegion); | ||
| 753 | } | 734 | } | ||
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