support for premultipled alpha

project/effect.cpp

@@ -29,9 +29,7 @@
 #include "effects/internal/paneffect.h"
 #include "effects/internal/shakeeffect.h"
 #include "effects/internal/cornerpineffect.h"
-#ifndef NOVST
 #include "effects/internal/vsthost.h"
-#endif
 #include "effects/internal/fillleftrighteffect.h"
 #include "effects/internal/frei0reffect.h"
 
@@ -754,7 +752,7 @@ GLuint Effect::process_superimpose(double timecode) {
 	int height = parent_clip->getHeight();
 
 	if (width != img.width() || height != img.height()) {
-		img = QImage(width, height, QImage::Format_RGBA8888);
+		img = QImage(width, height, QImage::Format_RGBA8888_Premultiplied);
 		recreate_texture = true;
 	}
 

project/footage.cpp

@@ -11,7 +11,15 @@ extern "C" {
 
 #include "project/clip.h"
 
-Footage::Footage() : ready(false), preview_gen(nullptr), invalid(false), in(0), out(0), speed(1.0) {
+Footage::Footage() :
+	ready(false),
+	preview_gen(nullptr),
+	invalid(false),
+	in(0),
+	out(0),
+	speed(1.0),
+	alpha_is_premultiplied(false)
+{
 	ready_lock.lock();
 }
 

project/footage.h

@@ -52,6 +52,7 @@ struct Footage {
 	bool ready;
 	bool invalid;
 	double speed;
+	bool alpha_is_premultiplied;
 
 	PreviewGenerator* preview_gen;
 	QMutex ready_lock;

project/undo.cpp

@@ -787,7 +787,7 @@ void SetAutoscaleAction::undo() {
 	for (int i=0;i<clips.size();i++) {
 		clips.at(i)->autoscale = !clips.at(i)->autoscale;
 	}
-	panel_sequence_viewer->viewer_widget->update();
+	panel_sequence_viewer->viewer_widget->frame_update();
 	mainWindow->setWindowModified(old_project_changed);
 }
 
@@ -795,7 +795,7 @@ void SetAutoscaleAction::redo() {
 	for (int i=0;i<clips.size();i++) {
 		clips.at(i)->autoscale = !clips.at(i)->autoscale;
 	}
-	panel_sequence_viewer->viewer_widget->update();
+	panel_sequence_viewer->viewer_widget->frame_update();
 	mainWindow->setWindowModified(true);
 }
 
@@ -1272,3 +1272,11 @@ void RefreshClips::redo() {
 		}
 	}
 }
+
+void UpdateViewer::undo() {
+	redo();
+}
+
+void UpdateViewer::redo() {
+	panel_sequence_viewer->viewer_widget->frame_update();
+}

project/undo.h

@@ -644,4 +644,10 @@ private:
 	Media* media;
 };
 
+class UpdateViewer : public QUndoCommand {
+public:
+	void undo();
+	void redo();
+};
+
 #endif // UNDO_H