nouveau: Very rough cut at gallium winsys + nv40 pipe driver.

1 files changed, 60 insertions, 0 deletions

diff --git a/src/mesa/pipe/nv40/nv40_miptree.c b/src/mesa/pipe/nv40/nv40_miptree.c
new file mode 100644
index 0000000000..6b85823d8c
--- /dev/null
+++ b/src/mesa/pipe/nv40/nv40_miptree.c
@@ -0,0 +1,60 @@
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_util.h"
+
+#include "nv40_context.h"
+
+boolean
+nv40_miptree_layout(struct pipe_context *pipe, struct pipe_mipmap_tree *mt)
+{
+	struct nv40_context *nv40 = (struct nv40_context *)pipe;
+	uint width, height, depth, offset;
+	boolean swizzled = FALSE;
+	int l;
+
+	mt->pitch = mt->width0;
+	mt->total_height = 0;
+
+	width = mt->width0;
+	height = mt->height0;
+	depth = mt->depth0;
+	offset = 0;
+	for (l = mt->first_level; l <= mt->last_level; l++) {
+		uint pitch, f;
+
+		mt->level[l].width = width;
+		mt->level[l].height = height;
+		mt->level[l].depth = depth;
+		mt->level[l].level_offset = offset;
+
+		if (!swizzled)
+			pitch = mt->width0;
+		else
+			pitch = width;
+
+		if (mt->target == PIPE_TEXTURE_CUBE)
+			mt->level[l].nr_images = 6;
+		else
+		if (mt->target == PIPE_TEXTURE_3D)
+			mt->level[l].nr_images = 3;
+		else
+			mt->level[l].nr_images = 1;
+		mt->level[l].image_offset =
+			malloc(mt->level[l].nr_images * sizeof(unsigned));
+
+		for (f = 0; f < mt->level[l].nr_images; f++) {
+			mt->level[l].image_offset[f] =
+				(offset - mt->level[l].level_offset) / mt->cpp;
+			mt->total_height += height;
+
+			offset += (pitch * mt->cpp * height);
+		}
+
+		width  = MAX2(1, width  >> 1);
+		height = MAX2(1, height >> 1);
+		depth  = MAX2(1, depth  >> 1);
+	}
+
+	return TRUE;
+}
+