3 files changed, 27 insertions, 7 deletions
diff --git a/src/qtmultimediaquicktools/qsgvideonode_rgb.cpp b/src/qtmultimediaquicktools/qsgvideonode_rgb.cpp
index 0dfa11ab9..d039e1e0b 100644
--- a/src/qtmultimediaquicktools/qsgvideonode_rgb.cpp
+++ b/src/qtmultimediaquicktools/qsgvideonode_rgb.cpp
@@ -113,11 +113,19 @@ protected:
 class QSGVideoMaterialShader_RGB_swizzle : public QSGVideoMaterialShader_RGB
 {
 public:
-    QSGVideoMaterialShader_RGB_swizzle()
-        : QSGVideoMaterialShader_RGB()
+    QSGVideoMaterialShader_RGB_swizzle(bool hasAlpha)
+        : m_hasAlpha(hasAlpha)
     {
         setShaderSourceFile(QOpenGLShader::Fragment, QStringLiteral(":/qtmultimediaquicktools/shaders/rgbvideo_swizzle.frag"));
     }
+
+protected:
+    void initialize() override {
+        QSGVideoMaterialShader_RGB::initialize();
+        program()->setUniformValue(program()->uniformLocation("hasAlpha"), GLboolean(m_hasAlpha));
+    }
+
+    bool m_hasAlpha;
 };
 
 
@@ -145,7 +153,8 @@ public:
     }
 
     QSGMaterialShader *createShader() const override {
-        return needsSwizzling() ? new QSGVideoMaterialShader_RGB_swizzle
+        const bool hasAlpha = m_format.pixelFormat() == QVideoFrame::Format_ARGB32;
+        return needsSwizzling() ? new QSGVideoMaterialShader_RGB_swizzle(hasAlpha)
                                 : new QSGVideoMaterialShader_RGB;
     }
 
diff --git a/src/qtmultimediaquicktools/qsgvideonode_texture.cpp b/src/qtmultimediaquicktools/qsgvideonode_texture.cpp
index a26d59532..f5545afc7 100644
--- a/src/qtmultimediaquicktools/qsgvideonode_texture.cpp
+++ b/src/qtmultimediaquicktools/qsgvideonode_texture.cpp
@@ -108,11 +108,19 @@ protected:
 class QSGVideoMaterialShader_Texture_swizzle : public QSGVideoMaterialShader_Texture
 {
 public:
-    QSGVideoMaterialShader_Texture_swizzle()
-        : QSGVideoMaterialShader_Texture()
+    QSGVideoMaterialShader_Texture_swizzle(bool hasAlpha)
+        : m_hasAlpha(hasAlpha)
     {
         setShaderSourceFile(QOpenGLShader::Fragment, QStringLiteral(":/qtmultimediaquicktools/shaders/rgbvideo_swizzle.frag"));
     }
+
+protected:
+    void initialize() override {
+        QSGVideoMaterialShader_Texture::initialize();
+        program()->setUniformValue(program()->uniformLocation("hasAlpha"), GLboolean(m_hasAlpha));
+    }
+
+    int m_hasAlpha;
 };
 
 
@@ -138,7 +146,8 @@ public:
     }
 
     QSGMaterialShader *createShader() const override {
-        return needsSwizzling() ? new QSGVideoMaterialShader_Texture_swizzle
+        const bool hasAlpha = m_format.pixelFormat() == QVideoFrame::Format_ARGB32;
+        return needsSwizzling() ? new QSGVideoMaterialShader_Texture_swizzle(hasAlpha)
                                 : new QSGVideoMaterialShader_Texture;
     }
 
diff --git a/src/qtmultimediaquicktools/shaders/rgbvideo_swizzle.frag b/src/qtmultimediaquicktools/shaders/rgbvideo_swizzle.frag
index f01dc86a0..df66bde63 100644
--- a/src/qtmultimediaquicktools/shaders/rgbvideo_swizzle.frag
+++ b/src/qtmultimediaquicktools/shaders/rgbvideo_swizzle.frag
@@ -1,8 +1,10 @@
 uniform sampler2D rgbTexture;
 uniform lowp float opacity;
 varying highp vec2 qt_TexCoord;
+uniform bool hasAlpha;
 
 void main()
 {
-    gl_FragColor =  vec4(texture2D(rgbTexture, qt_TexCoord).bgr, 1.0) * opacity;
+    vec4 v = texture2D(rgbTexture, qt_TexCoord);
+    gl_FragColor = vec4(v.bgr, hasAlpha ? v.a : 1.0) * opacity;
 }