Changeset 708 for trunk/src/gui/painting/qwindowsurface_raster.cpp

Timestamp:

Apr 26, 2010, 2:41:21 AM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

gui: Use the fastest GPI matrix transformation for mirroring the image when drawing windows using the old GpiDrawBits() approach.

File:

• trunk/src/gui/painting/qwindowsurface_raster.cpp (modified) (3 diffs)

trunk/src/gui/painting/qwindowsurface_raster.cpp

@@ -74 +74 @@
 LONG APIENTRY GpiQueryYInversion(HPS hps);
 BOOL APIENTRY GpiEnableYInversion(HPS hps, LONG lHeight);
-#define QT_BITMAP_MIRROR 1  // 1 = QImage.mirrored()
+#define QT_BITMAP_MIRROR   // 1 = QImage.mirrored()
                             // 2 = GpiEnableYInversion()
-                            // 3 = GPI Matrix
+                            // 3 = GPI Matrix
 #endif
 
@@ -261 +261 @@
 #elif QT_BITMAP_MIRROR == 2
 
+
+
+
+
     br.translate(offset);
 
@@ -307 +311 @@
 #elif QT_BITMAP_MIRROR == 3
 
-    // use the reflection + transformation matrix to flip the y axis.
-    // This should be slower than flipping the image ourselves (unless this
-    // particular matrix is recognized by the driver which then enters some
-    // special mode that doesn't require any flipping at all but uses the
-    // image as is) hence disabled for now.
-    // @todo check if it's really slower than flipping the image bits instead
-    // @todo I guess we can use DIVE here; check it too
+    // Use the reflection + transformation matrix to flip the y axis.
+    // This is proven to be much faster than manual image flipping on the real
+    // video hardware as it probably involves some hardware acceleration in
+    // the video driver.
+
     MATRIXLF m;
     m.fxM11 = MAKEFIXED(1, 0);