nv30: add state scissor, based on nv40 one

3 files changed, 39 insertions, 0 deletions

diff --git a/src/gallium/drivers/nv30/Makefile b/src/gallium/drivers/nv30/Makefile
index c5208fabf5e..134130c0e00 100644
--- a/src/gallium/drivers/nv30/Makefile
+++ b/src/gallium/drivers/nv30/Makefile
@@ -17,6 +17,7 @@ DRIVER_SOURCES = \
 	nv30_state_emit.c \
 	nv30_state_fb.c \
 	nv30_state_rasterizer.c \
+	nv30_state_scissor.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 43ee8d13a0c..428f17ae0d6 100644
--- a/src/gallium/drivers/nv30/nv30_context.h
+++ b/src/gallium/drivers/nv30/nv30_context.h
@@ -90,6 +90,8 @@ struct nv30_blend_state_new {
 
 
 struct nv30_state {
+	unsigned scissor_enabled;
+
 	struct nouveau_stateobj *hw[NV30_STATE_MAX];
 };
 
@@ -104,6 +106,7 @@ struct nv30_context {
 
 	/* HW state derived from pipe states */
 	struct nv30_state state;
+	struct pipe_scissor_state scissor;
 
 	uint32_t dirty;
 
diff --git a/src/gallium/drivers/nv30/nv30_state_scissor.c b/src/gallium/drivers/nv30/nv30_state_scissor.c
new file mode 100644
index 00000000000..1db9bc17955
--- /dev/null
+++ b/src/gallium/drivers/nv30/nv30_state_scissor.c
@@ -0,0 +1,35 @@
+#include "nv30_context.h"
+
+static boolean
+nv30_state_scissor_validate(struct nv30_context *nv30)
+{
+	struct pipe_rasterizer_state *rast = &nv30->rasterizer->pipe;
+	struct pipe_scissor_state *s = &nv30->scissor;
+	struct nouveau_stateobj *so;
+
+	if (nv30->state.hw[NV30_STATE_SCISSOR] &&
+	    (rast->scissor == 0 && nv30->state.scissor_enabled == 0))
+		return FALSE;
+	nv30->state.scissor_enabled = rast->scissor;
+
+	so = so_new(3, 0);
+	so_method(so, nv30->screen->rankine, NV34TCL_SCISSOR_HORIZ, 2);
+	if (nv30->state.scissor_enabled) {
+		so_data  (so, ((s->maxx - s->minx) << 16) | s->minx);
+		so_data  (so, ((s->maxy - s->miny) << 16) | s->miny);
+	} else {
+		so_data  (so, 4096 << 16);
+		so_data  (so, 4096 << 16);
+	}
+
+	so_ref(so, &nv30->state.hw[NV30_STATE_SCISSOR]);
+	return TRUE;
+}
+
+struct nv30_state_entry nv30_state_scissor = {
+	.validate = nv30_state_scissor_validate,
+	.dirty = {
+		.pipe = NV30_NEW_SCISSOR | NV30_NEW_RAST,
+		.hw = NV30_STATE_SCISSOR
+	}
+};