Fix T36566: 2D filters broken in the Blenderplayer when using side by side stereo

GPC_Canvas::GetWindowArea() and KX_BlenderCanvas::GetWindowArea() are tracking two
different things. The 2d filter system doesn't actually need the window area and
can get by just using the viewport dimensions, which it now does. The GetWindowArea()
mess should probably be cleaned up.

1 files changed, 5 insertions, 9 deletions

diff --git a/source/gameengine/Rasterizer/RAS_2DFilterManager.cpp b/source/gameengine/Rasterizer/RAS_2DFilterManager.cpp
index e85b57f1769..abbe65738d4 100644
--- a/source/gameengine/Rasterizer/RAS_2DFilterManager.cpp
+++ b/source/gameengine/Rasterizer/RAS_2DFilterManager.cpp
@@ -395,10 +395,8 @@ void RAS_2DFilterManager::RenderFilters(RAS_ICanvas* canvas)
 		return;
 
 	const int *viewport = canvas->GetViewPort();
-	RAS_Rect rect = canvas->GetWindowArea();
-	int rect_width = rect.GetWidth()+1, rect_height = rect.GetHeight()+1;
 
-	if (texturewidth != rect_width || textureheight != rect_height)
+	if (texturewidth != viewport[2] || textureheight != viewport[3])
 	{
 		UpdateOffsetMatrix(canvas);
 		UpdateCanvasTextureCoord(viewport);
@@ -414,22 +412,22 @@ void RAS_2DFilterManager::RenderFilters(RAS_ICanvas* canvas)
 	if (need_depth) {
 		glActiveTextureARB(GL_TEXTURE1);
 		glBindTexture(GL_TEXTURE_2D, texname[1]);
-		glCopyTexImage2D(GL_TEXTURE_2D,0,GL_DEPTH_COMPONENT, rect.GetLeft(), rect.GetBottom(), rect_width, rect_height, 0);
+		glCopyTexImage2D(GL_TEXTURE_2D,0,GL_DEPTH_COMPONENT, viewport[0], viewport[1], viewport[2], viewport[3], 0);
 	}
 	
 	if (need_luminance) {
 		glActiveTextureARB(GL_TEXTURE2);
 		glBindTexture(GL_TEXTURE_2D, texname[2]);
-		glCopyTexImage2D(GL_TEXTURE_2D,0,GL_LUMINANCE16, rect.GetLeft(), rect.GetBottom(), rect_width, rect_height, 0);
+		glCopyTexImage2D(GL_TEXTURE_2D,0,GL_LUMINANCE16, viewport[0], viewport[1], viewport[2], viewport[3], 0);
 	}
 
 	// reverting to texunit 0, without this we get bug [#28462]
 	glActiveTextureARB(GL_TEXTURE0);
-	canvas->SetViewPort(0, 0, rect_width-1, rect_height-1);
 
 	// We do this to make side-by-side stereo rendering work correctly with 2D filters. It would probably be nicer to just set the viewport,
 	// but it can be easier for writing shaders to have the coordinates for the whole screen instead of just part of the screen. 
 	RAS_Rect scissor_rect = canvas->GetDisplayArea();
+
 	glScissor(scissor_rect.GetLeft() + viewport[0],
 	          scissor_rect.GetBottom() + viewport[1],
 	          scissor_rect.GetWidth() + 1,
@@ -459,7 +457,7 @@ void RAS_2DFilterManager::RenderFilters(RAS_ICanvas* canvas)
 
 			glActiveTextureARB(GL_TEXTURE0);
 			glBindTexture(GL_TEXTURE_2D, texname[0]);
-			glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, rect.GetLeft(), rect.GetBottom(), rect_width, rect_height, 0); // Don't use texturewidth and textureheight in case we don't have NPOT support
+			glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, viewport[0], viewport[1], viewport[2], viewport[3], 0); // Don't use texturewidth and textureheight in case we don't have NPOT support
 			glClear(GL_COLOR_BUFFER_BIT);
 
 			glBegin(GL_QUADS);
@@ -473,8 +471,6 @@ void RAS_2DFilterManager::RenderFilters(RAS_ICanvas* canvas)
 	}
 
 	glEnable(GL_DEPTH_TEST);
-	//We can't pass the results of canvas->GetViewPort() directly because canvas->SetViewPort() does some extra math [#34517]
-	canvas->SetViewPort(0, 0, viewport[2]-1, viewport[3]-1);
 	EndShaderProgram();
 	glPopMatrix();
 	glMatrixMode(GL_MODELVIEW);