OpenVG: Fix rendering of non-affine transformed rectangles

Perspective transforms need special handling in OpenVG. However, that
was only done for rounded rectangles. Enable it for zero-radius
rectangles too.

Fixes: QTBUG-76589
Change-Id: Ibe2e0344dfde45f70f8f443fcd22d33e89eae286
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

1 files changed, 5 insertions, 12 deletions

diff --git a/src/plugins/scenegraph/openvg/qsgopenvginternalrectanglenode.cpp b/src/plugins/scenegraph/openvg/qsgopenvginternalrectanglenode.cpp
index d728686248..2c71c1610a 100644
--- a/src/plugins/scenegraph/openvg/qsgopenvginternalrectanglenode.cpp
+++ b/src/plugins/scenegraph/openvg/qsgopenvginternalrectanglenode.cpp
@@ -211,21 +211,14 @@ void QSGOpenVGInternalRectangleNode::render()
     } else {
         vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
         vgLoadIdentity();
-        if (m_radius > 0) {
-            // Fallback to rendering to an image for rounded rects with perspective transforms
-            if (m_offscreenSurface == nullptr || m_offscreenSurface->size() != QSize(std::ceil(m_rect.width()), std::ceil(m_rect.height()))) {
-                delete m_offscreenSurface;
-                m_offscreenSurface = new QOpenVGOffscreenSurface(QSize(std::ceil(m_rect.width()), std::ceil(m_rect.height())));
-            }
-
-            m_offscreenSurface->makeCurrent();
-        } else if (m_offscreenSurface) {
+        // Fallback to rendering to an image for rounded rects with perspective transforms
+        if (m_offscreenSurface == nullptr || m_offscreenSurface->size() != QSize(std::ceil(m_rect.width()), std::ceil(m_rect.height()))) {
             delete m_offscreenSurface;
-            m_offscreenSurface = nullptr;
+            m_offscreenSurface = new QOpenVGOffscreenSurface(QSize(std::ceil(m_rect.width()), std::ceil(m_rect.height())));
         }
+        m_offscreenSurface->makeCurrent();
     }
 
-
     // If path is dirty
     if (m_pathDirty) {
         vgClearPath(m_rectanglePath, VG_PATH_CAPABILITY_APPEND_TO);
@@ -291,7 +284,7 @@ void QSGOpenVGInternalRectangleNode::render()
         vgDrawPath(m_rectanglePath, VG_FILL_PATH);
     }
 
-    if (!transform().isAffine() && m_radius > 0) {
+    if (!transform().isAffine()) {
         m_offscreenSurface->doneCurrent();
         //  Render offscreen surface
         vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);