mesa: Refactor viewport transform computation.

This is for preparation of ARB_clip_control.

v3:
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Reviewed-by: Brian Paul <[email protected]>
Signed-off-by: Mathias Froehlich <[email protected]>

1 files changed, 5 insertions, 4 deletions

diff --git a/src/mesa/main/state.c b/src/mesa/main/state.c
index 80287c47062..3dbbfaac76c 100644
--- a/src/mesa/main/state.c
+++ b/src/mesa/main/state.c
@@ -51,6 +51,7 @@
 #include "texobj.h"
 #include "texstate.h"
 #include "varray.h"
+#include "viewport.h"
 #include "blend.h"
 
 
@@ -281,11 +282,11 @@ update_viewport_matrix(struct gl_context *ctx)
     * NOTE: RasterPos uses this.
     */
    for (i = 0; i < ctx->Const.MaxViewports; i++) {
+      double scale[3], translate[3];
+
+      _mesa_get_viewport_xform(ctx, i, scale, translate);
       _math_matrix_viewport(&ctx->ViewportArray[i]._WindowMap,
-                            ctx->ViewportArray[i].X, ctx->ViewportArray[i].Y,
-                            ctx->ViewportArray[i].Width, ctx->ViewportArray[i].Height,
-                            ctx->ViewportArray[i].Near, ctx->ViewportArray[i].Far,
-                            depthMax);
+                            scale, translate, depthMax);
    }
 }