nv30: add state viewport, based on nv40 one

3 files changed, 73 insertions, 0 deletions

diff --git a/src/gallium/drivers/nv30/Makefile b/src/gallium/drivers/nv30/Makefile
index 91601087a34..a6a8cf1df9c 100644
--- a/src/gallium/drivers/nv30/Makefile
+++ b/src/gallium/drivers/nv30/Makefile
@@ -19,6 +19,7 @@ DRIVER_SOURCES = \
 	nv30_state_rasterizer.c \
 	nv30_state_scissor.c \
 	nv30_state_stipple.c \
+	nv30_state_viewport.c \
 	nv30_surface.c \
 	nv30_vbo.c \
 	nv30_vertprog.c
diff --git a/src/gallium/drivers/nv30/nv30_context.h b/src/gallium/drivers/nv30/nv30_context.h
index 446e43a726d..eb7e5a8b124 100644
--- a/src/gallium/drivers/nv30/nv30_context.h
+++ b/src/gallium/drivers/nv30/nv30_context.h
@@ -92,6 +92,7 @@ struct nv30_blend_state_new {
 struct nv30_state {
 	unsigned scissor_enabled;
 	unsigned stipple_enabled;
+	unsigned viewport_bypass;
 
 	struct nouveau_stateobj *hw[NV30_STATE_MAX];
 };
@@ -120,6 +121,7 @@ struct nv30_context {
 	/* Context state */
 	struct nv30_blend_state_new *blend;
 	struct pipe_blend_color blend_colour;
+	struct pipe_viewport_state viewport;
 	struct pipe_framebuffer_state framebuffer;
 	struct nv30_rasterizer_state_new *rasterizer;
 	unsigned stipple[32];
diff --git a/src/gallium/drivers/nv30/nv30_state_viewport.c b/src/gallium/drivers/nv30/nv30_state_viewport.c
new file mode 100644
index 00000000000..951d40ebfdd
--- /dev/null
+++ b/src/gallium/drivers/nv30/nv30_state_viewport.c
@@ -0,0 +1,70 @@
+#include "nv30_context.h"
+
+static boolean
+nv30_state_viewport_validate(struct nv30_context *nv30)
+{
+	struct pipe_viewport_state *vpt = &nv30->viewport;
+	struct nouveau_stateobj *so;
+	unsigned bypass;
+
+	if (/*nv30->render_mode == HW &&*/ !nv30->rasterizer->pipe.bypass_clipping)
+		bypass = 0;
+	else
+		bypass = 1;
+
+	if (nv30->state.hw[NV30_STATE_VIEWPORT] &&
+	    (bypass || !(nv30->dirty & NV30_NEW_VIEWPORT)) &&
+	    nv30->state.viewport_bypass == bypass)
+		return FALSE;
+	nv30->state.viewport_bypass = bypass;
+
+	so = so_new(11, 0);
+	if (!bypass) {
+		so_method(so, nv30->screen->rankine,
+			  NV34TCL_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, nv30->screen->rankine, 0x1d78, 1);
+		so_data  (so, 1);
+*/	} else {
+		so_method(so, nv30->screen->rankine,
+			  NV34TCL_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, nv30->screen->rankine, 0x1d78, 1);
+		so_data  (so, 0x110);
+*/	}
+	/* TODO/FIXME: never saw value 0x0110 in renouveau dumps, only 0x0001 */
+	so_method(so, nv30->screen->rankine, 0x1d78, 1);
+	so_data  (so, 1);
+
+	so_ref(so, &nv30->state.hw[NV30_STATE_VIEWPORT]);
+	return TRUE;
+}
+
+struct nv30_state_entry nv30_state_viewport = {
+	.validate = nv30_state_viewport_validate,
+	.dirty = {
+		.pipe = NV30_NEW_VIEWPORT | NV30_NEW_RAST,
+		.hw = NV30_STATE_VIEWPORT
+	}
+};