DX9: Simplify some expressions

hrydgard · Jan 26, 2020 · 41a6b97 · 41a6b97
1 parent 118e927
commit 41a6b97
Showing 1 changed file with 11 additions and 7 deletions.
diff --git a/GPU/Directx9/ShaderManagerDX9.cpp b/GPU/Directx9/ShaderManagerDX9.cpp
@@ -243,14 +243,18 @@ void ShaderManagerDX9::VSSetMatrix(int creg, const float* pMatrix) {
 static void ConvertProjMatrixToD3D(Matrix4x4 &in, bool invertedX, bool invertedY) {
 	// Half pixel offset hack
 	float xoff = 1.0f / gstate_c.curRTRenderWidth;
-	xoff = gstate_c.vpXOffset + (invertedX ? xoff : -xoff);
-	float yoff = -1.0f / gstate_c.curRTRenderHeight;
-	yoff = gstate_c.vpYOffset + (invertedY ? yoff : -yoff);
+	if (invertedX) {
+		xoff = -gstate_c.vpXOffset - xoff;
+	} else {
+		xoff = gstate_c.vpXOffset - xoff;
+	}
 
-	if (invertedX)
-		xoff = -xoff;
-	if (invertedY)
-		yoff = -yoff;
+	float yoff = -1.0f / gstate_c.curRTRenderHeight;
+	if (invertedY) {
+		yoff = gstate_c.vpYOffset - yoff;
+	} else {
+		yoff = -gstate_c.vpYOffset - yoff;
+	}
 
 	const Vec3 trans(xoff, yoff, gstate_c.vpZOffset * 0.5f + 0.5f);
 	const Vec3 scale(gstate_c.vpWidthScale, gstate_c.vpHeightScale, gstate_c.vpDepthScale * 0.5f);