Fix #20891: opengl animation render could mess up the view.

The problem was that wmPushMatrix/wmOrtho/.. and similar functions did not
work well for offscreen rendering. It would have been possible to make a
fake subwindow for this, but I decided to just remove this extra layer as
it does not seem to have much purpose and has been quite confusing when
trying to fix other bugs. The relevant matrices are already stored in
RegionView3D so there will be no increase in calls to glGetFloat, which may
have been a performance reason to use this system in the past.

1 files changed, 9 insertions, 3 deletions

diff --git a/source/blender/editors/interface/interface.c b/source/blender/editors/interface/interface.c
index ac85e865b19..7d9d78f5b20 100644
--- a/source/blender/editors/interface/interface.c
+++ b/source/blender/editors/interface/interface.c
@@ -746,8 +746,11 @@ void uiDrawBlock(const bContext *C, uiBlock *block)
 	ui_but_to_pixelrect(&rect, ar, block, NULL);
 	
 	/* pixel space for AA widgets */
-	wmPushMatrix();
-	wmLoadIdentity();
+	glMatrixMode(GL_PROJECTION);
+	glPushMatrix();
+	glMatrixMode(GL_MODELVIEW);
+	glPushMatrix();
+	glLoadIdentity();
 	
 	wmOrtho2(-0.01f, ar->winx-0.01f, -0.01f, ar->winy-0.01f);
 	
@@ -765,7 +768,10 @@ void uiDrawBlock(const bContext *C, uiBlock *block)
 	}
 	
 	/* restore matrix */
-	wmPopMatrix();
+	glMatrixMode(GL_PROJECTION);
+	glPopMatrix();
+	glMatrixMode(GL_MODELVIEW);
+	glPopMatrix();
 	
 	ui_draw_links(block);
 }