wined3d: Adjust the rhw transformation for offscreen rendering.

When drawing processed vertices with the fixed function pipeline the projection matrix is set up to map y values from 0 to height to 1.0; -1.0(gl and d3d coord systems are flipped). This moves the y axis to the bottom of the drawing area. When later on the y inversion matrix is applied for offscreen rendering, the coordinate system will get flipped out of the viewport. This patch sets the Y range up upside down when using offscreen rendering, so the invymat will flip it to the correct position. This has to happen before the 0.375 pixel correction.

wined3d: Adjust the rhw transformation for offscreen rendering.
2cdced81 · Stefan Dösinger · Alexandre Julliard · 7126b636 · 2cdced81
Commit 2cdced81 authored Mar 03, 2007 by Stefan Dösinger Committed by Alexandre Julliard Mar 05, 2007
Hide whitespace changes
Inline Side-by-side

Showing with 10 additions and 2 deletions

state.c dlls/wined3d/state.c +10 -2

No files found.
--- a/dlls/wined3d/state.c
+++ b/dlls/wined3d/state.c
@@ -2154,7 +2154,11 @@ static void transform_projection(DWORD state, IWineD3DStateBlockImpl *stateblock
             * the Z coordinate does not affect the size of the primitives
             */
            TRACE("Calling glOrtho with %f, %f, %f, %f\n", width, height, -minZ, -maxZ);
-            glOrtho(X, X + width, Y + height, Y, -minZ, -maxZ);
+            if(stateblock->wineD3DDevice->render_offscreen) {
+                glOrtho(X, X + width, Y, Y - height, -minZ, -maxZ);
+            } else {
+                glOrtho(X, X + width, Y + height, Y, -minZ, -maxZ);
+            }
        } else {
            /* If the app mixes transformed and untransformed primitives we can't use the coordinate system
             * trick above because this would mess up transformed and untransformed Z order. Pass the z position
@@ -2164,7 +2168,11 @@ static void transform_projection(DWORD state, IWineD3DStateBlockImpl *stateblock
             * replacement shader.
             */
            TRACE("Calling glOrtho with %f, %f, %f, %f\n", width, height, 1.0, -1.0);
-            glOrtho(X, X + width, Y + height, Y, 1.0, -1.0);
+            if(stateblock->wineD3DDevice->render_offscreen) {
+                glOrtho(X, X + width, Y, Y - height, 1.0, -1.0);
+            } else {
+                glOrtho(X, X + width, Y + height, Y, 1.0, -1.0);
+            }
        }
        checkGLcall("glOrtho");