eglfs: implement hardware cursor for the raspberry-pi

The cursor is rendered on a dispmanx layer and moved
around. This approach saves us from having to update the
underlying window each time the cursor moves.

Dispmanx layers cannot be moved to negative coords. As
a result, currently it is not possible to move to a
location less than the hostpot. A future commit will
fix this problem.

Change-Id: Ida5ee961d03a6929860c515e503482756a4913ed
Reviewed-by: Johannes Zellner <johannes.zellner@nokia.com>
Reviewed-by: Andy Nichols <andy.nichols@nokia.com>
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

1 files changed, 23 insertions, 17 deletions

diff --git a/src/plugins/platforms/eglfs/qeglfscursor.h b/src/plugins/platforms/eglfs/qeglfscursor.h
index c8c4a8307c..464b52e195 100644
--- a/src/plugins/platforms/eglfs/qeglfscursor.h
+++ b/src/plugins/platforms/eglfs/qeglfscursor.h
@@ -49,6 +49,7 @@
 QT_BEGIN_NAMESPACE
 
 class QOpenGLShaderProgram;
+class QEglFSScreen;
 
 class QEglFSCursor : public QPlatformCursor
 {
@@ -64,15 +65,34 @@ public:
 
     QRect cursorRect() const;
 
-    void render();
+    virtual void paintOnScreen();
+
+protected:
+    bool setCurrentCursor(QCursor *cursor);
+    void draw(const QRectF &rect);
+    void update(const QRegion &region);
+
+    QEglFSScreen *m_screen;
+
+    // current cursor information
+    struct Cursor {
+        Cursor() : texture(0), shape(Qt::BlankCursor), customCursorTexture(0) { }
+        uint texture; // a texture from 'image' or the atlas
+        Qt::CursorShape shape;
+        QRectF textureRect; // normalized rect inside texture
+        QSize size; // size of the cursor
+        QPoint hotSpot;
+        QImage customCursorImage;
+        uint customCursorTexture;
+    } m_cursor;
+
+    QPoint m_pos; // current cursor position
 
 private:
     void createShaderPrograms();
     static void createCursorTexture(uint *texture, const QImage &image);
     void initCursorAtlas();
 
-    QPlatformScreen *m_screen;
-
     // cursor atlas information
     struct CursorAtlas {
         CursorAtlas() : cursorsPerRow(0), texture(0), cursorWidth(0), cursorHeight(0) { }
@@ -84,20 +104,6 @@ private:
         QImage image; // valid until it's uploaded
     } m_cursorAtlas;
 
-    // current cursor information
-    struct Cursor {
-        Cursor() : texture(0), shape(Qt::BlankCursor), customCursorTexture(0) { }
-        uint texture; // a texture from 'image' or the atlas
-        Qt::CursorShape shape;
-        QRectF textureRect; // normalized rect inside texture
-        QSize size; // size of the cursor
-        QPoint hotSpot;
-        QImage customCursorImage;
-        uint customCursorTexture;
-    } m_cursor;
-
-    QPoint m_pos;
-
     GLuint m_program;
     int m_vertexCoordEntry;
     int m_textureCoordEntry;