1 files changed, 105 insertions, 0 deletions
diff --git a/src/gallium/drivers/nv30/nv30_miptree.c b/src/gallium/drivers/nv30/nv30_miptree.c
new file mode 100644
index 00000000000..5fb89f4cfdc
--- /dev/null
+++ b/src/gallium/drivers/nv30/nv30_miptree.c
@@ -0,0 +1,105 @@
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_util.h"
+#include "pipe/p_inlines.h"
+
+#include "nv30_context.h"
+
+static void
+nv30_miptree_layout(struct nv30_miptree *nv30mt)
+{
+	struct pipe_texture *pt = &nv30mt->base;
+	boolean swizzled = FALSE;
+	uint width = pt->width[0], height = pt->height[0], depth = pt->depth[0];
+	uint offset = 0;
+	int nr_faces, l, f;
+
+	if (pt->target == PIPE_TEXTURE_CUBE) {
+		nr_faces = 6;
+	} else
+	if (pt->target == PIPE_TEXTURE_3D) {
+		nr_faces = pt->depth[0];
+	} else {
+		nr_faces = 1;
+	}
+	
+	for (l = 0; l <= pt->last_level; l++) {
+		pt->width[l] = width;
+		pt->height[l] = height;
+		pt->depth[l] = depth;
+
+		if (swizzled)
+			nv30mt->level[l].pitch = pt->width[l] * pt->cpp;
+		else
+			nv30mt->level[l].pitch = pt->width[0] * pt->cpp;
+		nv30mt->level[l].pitch = (nv30mt->level[l].pitch + 63) & ~63;
+
+		nv30mt->level[l].image_offset =
+			CALLOC(nr_faces, sizeof(unsigned));
+
+		width  = MAX2(1, width  >> 1);
+		height = MAX2(1, height >> 1);
+		depth  = MAX2(1, depth  >> 1);
+
+	}
+
+	for (f = 0; f < nr_faces; f++) {
+		for (l = 0; l <= pt->last_level; l++) {
+			nv30mt->level[l].image_offset[f] = offset;
+			offset += nv30mt->level[l].pitch * pt->height[l];
+		}
+	}
+
+	nv30mt->total_size = offset;
+}
+
+static void
+nv30_miptree_create(struct pipe_context *pipe, struct pipe_texture **pt)
+{
+	struct pipe_winsys *ws = pipe->winsys;
+	struct nv30_miptree *nv30mt;
+
+	nv30mt = realloc(*pt, sizeof(struct nv30_miptree));
+	if (!nv30mt)
+		return;
+	*pt = NULL;
+
+	nv30_miptree_layout(nv30mt);
+
+	nv30mt->buffer = ws->buffer_create(ws, 256, PIPE_BUFFER_USAGE_PIXEL,
+					   nv30mt->total_size);
+	if (!nv30mt->buffer) {
+		free(nv30mt);
+		return;
+	}
+	
+	*pt = &nv30mt->base;
+}
+
+static void
+nv30_miptree_release(struct pipe_context *pipe, struct pipe_texture **pt)
+{
+	struct pipe_winsys *ws = pipe->winsys;
+	struct pipe_texture *mt = *pt;
+
+	*pt = NULL;
+	if (--mt->refcount <= 0) {
+		struct nv30_miptree *nv30mt = (struct nv30_miptree *)mt;
+		int l;
+
+		pipe_buffer_reference(ws, &nv30mt->buffer, NULL);
+		for (l = 0; l <= mt->last_level; l++) {
+			if (nv30mt->level[l].image_offset)
+				free(nv30mt->level[l].image_offset);
+		}
+		free(nv30mt);
+	}
+}
+
+void
+nv30_init_miptree_functions(struct nv30_context *nv30)
+{
+	nv30->pipe.texture_create = nv30_miptree_create;
+	nv30->pipe.texture_release = nv30_miptree_release;
+}
+