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Diffstat (limited to 'src/gallium/drivers/nv40/nv40_state_viewport.c')
-rw-r--r--src/gallium/drivers/nv40/nv40_state_viewport.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/src/gallium/drivers/nv40/nv40_state_viewport.c b/src/gallium/drivers/nv40/nv40_state_viewport.c
new file mode 100644
index 00000000000..869a55b4053
--- /dev/null
+++ b/src/gallium/drivers/nv40/nv40_state_viewport.c
@@ -0,0 +1,67 @@
+#include "nv40_context.h"
+
+static boolean
+nv40_state_viewport_validate(struct nv40_context *nv40)
+{
+ struct pipe_viewport_state *vpt = &nv40->viewport;
+ struct nouveau_stateobj *so;
+ unsigned bypass;
+
+ if (nv40->render_mode == HW && !nv40->rasterizer->pipe.bypass_clipping)
+ bypass = 0;
+ else
+ bypass = 1;
+
+ if (nv40->state.hw[NV40_STATE_VIEWPORT] &&
+ (bypass || !(nv40->dirty & NV40_NEW_VIEWPORT)) &&
+ nv40->state.viewport_bypass == bypass)
+ return FALSE;
+ nv40->state.viewport_bypass = bypass;
+
+ so = so_new(11, 0);
+ if (!bypass) {
+ so_method(so, nv40->screen->curie,
+ NV40TCL_VIEWPORT_TRANSLATE_X, 8);
+ so_data (so, fui(vpt->translate[0]));
+ so_data (so, fui(vpt->translate[1]));
+ so_data (so, fui(vpt->translate[2]));
+ so_data (so, fui(vpt->translate[3]));
+ so_data (so, fui(vpt->scale[0]));
+ so_data (so, fui(vpt->scale[1]));
+ so_data (so, fui(vpt->scale[2]));
+ so_data (so, fui(vpt->scale[3]));
+ so_method(so, nv40->screen->curie, 0x1d78, 1);
+ so_data (so, 1);
+ } else {
+ so_method(so, nv40->screen->curie,
+ NV40TCL_VIEWPORT_TRANSLATE_X, 8);
+ so_data (so, fui(0.0));
+ so_data (so, fui(0.0));
+ so_data (so, fui(0.0));
+ so_data (so, fui(0.0));
+ so_data (so, fui(1.0));
+ so_data (so, fui(1.0));
+ so_data (so, fui(1.0));
+ so_data (so, fui(0.0));
+ /* Not entirely certain what this is yet. The DDX uses this
+ * value also as it fixes rendering when you pass
+ * pre-transformed vertices to the GPU. My best gusss is that
+ * this bypasses some culling/clipping stage. Might be worth
+ * noting that points/lines are uneffected by whatever this
+ * value fixes, only filled polygons are effected.
+ */
+ so_method(so, nv40->screen->curie, 0x1d78, 1);
+ so_data (so, 0x110);
+ }
+
+ so_ref(so, &nv40->state.hw[NV40_STATE_VIEWPORT]);
+ return TRUE;
+}
+
+struct nv40_state_entry nv40_state_viewport = {
+ .validate = nv40_state_viewport_validate,
+ .dirty = {
+ .pipe = NV40_NEW_VIEWPORT | NV40_NEW_RAST,
+ .hw = NV40_STATE_VIEWPORT
+ }
+};