[vlc-devel] [PATCH 6/6] WIP qtqlvlc: update the rendering size when changing the window size

[Steve Lhomme]

TODO: lock the displayed texture in Qt thread while the decoder thread may update the 3 textures
---
 doc/libvlc/QtGL/qtvlcwidget.cpp | 23 +++++++++++++++++++++--
 doc/libvlc/QtGL/qtvlcwidget.h   |  1 +
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/doc/libvlc/QtGL/qtvlcwidget.cpp b/doc/libvlc/QtGL/qtvlcwidget.cpp
index 6ad6685e6a..eb72774370 100644
--- a/doc/libvlc/QtGL/qtvlcwidget.cpp
+++ b/doc/libvlc/QtGL/qtvlcwidget.cpp
@@ -134,6 +134,15 @@ QtVLCWidget::QtVLCWidget(QWidget *parent)
       vertexBuffer(QOpenGLBuffer::VertexBuffer),
       vertexIndexBuffer(QOpenGLBuffer::IndexBuffer)
 {
+    m_DisplayConfig = reinterpret_cast<libvlc_video_surface_cfg_t *>(malloc( sizeof(libvlc_video_surface_cfg_t) ));
+    m_DisplayConfig->width = width();
+    m_DisplayConfig->height = height();
+    m_DisplayConfig->chroma = libvlc_video_surface_chroma_rgba8;
+    m_DisplayConfig->limited_range = false;
+    m_DisplayConfig->transfer = libvlc_video_transfer_srgb;
+    m_DisplayConfig->colorspace = libvlc_video_colorspace_bt709;
+    m_DisplayConfig->primaries = libvlc_video_primary_bt709;
+
     // --transparent causes the clear color to be transparent. Therefore, on systems that
     // support it, the widget will become transparent apart from the logo.
 
@@ -159,6 +168,9 @@ bool QtVLCWidget::playMedia(const char* url)
         return false;
     }
 
+    // setup the display
+    libvlc_video_set_surface_display_config( m_mp, m_DisplayConfig );
+
     // Define the opengl rendering callbacks
     libvlc_video_set_surface_callbacks(m_mp, libvlc_video_engine_opengl,
         VLCVideo::setup, VLCVideo::cleanup, VLCVideo::resizeRenderTextures, VLCVideo::swap,
@@ -174,6 +186,7 @@ bool QtVLCWidget::playMedia(const char* url)
 QtVLCWidget::~QtVLCWidget()
 {
     cleanup();
+    free( m_DisplayConfig );
 }
 
 QSize QtVLCWidget::minimumSizeHint() const
@@ -307,7 +320,13 @@ void QtVLCWidget::paintGL()
     }
 }
 
-void QtVLCWidget::resizeGL(int w, int h)
+void QtVLCWidget::resizeGL(int width, int height)
 {
-    /* TODO */
+    if (m_DisplayConfig->width != width || m_DisplayConfig->height != height)
+    {
+        m_DisplayConfig->width  = width;
+        m_DisplayConfig->height = height;
+        if (m_mp != nullptr)
+            libvlc_video_set_surface_display_config( m_mp, m_DisplayConfig );
+    }
 }
diff --git a/doc/libvlc/QtGL/qtvlcwidget.h b/doc/libvlc/QtGL/qtvlcwidget.h
index febbc6252f..9e1d7a39ed 100644
--- a/doc/libvlc/QtGL/qtvlcwidget.h
+++ b/doc/libvlc/QtGL/qtvlcwidget.h
@@ -39,6 +39,7 @@ private:
     struct libvlc_instance_t*  m_vlc = nullptr;
     struct libvlc_media_player_t* m_mp = nullptr;
     struct libvlc_media_t* m_media = nullptr;
+    struct libvlc_video_surface_cfg_t* m_DisplayConfig;
 
     QOpenGLBuffer vertexBuffer, vertexIndexBuffer;
 };
-- 
2.17.1