1 files changed, 152 insertions, 0 deletions
diff --git a/src/gallium/drivers/nv40/nv40_miptree.c b/src/gallium/drivers/nv40/nv40_miptree.c
new file mode 100644
index 0000000000..1b19217223
--- /dev/null
+++ b/src/gallium/drivers/nv40/nv40_miptree.c
@@ -0,0 +1,152 @@
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_util.h"
+#include "pipe/p_inlines.h"
+
+#include "nv40_context.h"
+
+static void
+nv40_miptree_layout(struct nv40_miptree *nv40mt)
+{
+	struct pipe_texture *pt = &nv40mt->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, pitch;
+
+	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;
+	}
+
+	pitch = pt->width[0];
+	for (l = 0; l <= pt->last_level; l++) {
+		pt->width[l] = width;
+		pt->height[l] = height;
+		pt->depth[l] = depth;
+
+		if (swizzled)
+			pitch = pt->width[l];
+		pitch = (pitch + 63) & ~63;
+
+		nv40mt->level[l].pitch = pitch * pt->cpp;
+		nv40mt->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++) {
+			nv40mt->level[l].image_offset[f] = offset;
+			offset += nv40mt->level[l].pitch * pt->height[l];
+		}
+	}
+
+	nv40mt->total_size = offset;
+}
+
+static struct pipe_texture *
+nv40_miptree_create(struct pipe_screen *pscreen, const struct pipe_texture *pt)
+{
+	struct pipe_winsys *ws = pscreen->winsys;
+	struct nv40_miptree *mt;
+
+	mt = MALLOC(sizeof(struct nv40_miptree));
+	if (!mt)
+		return NULL;
+	mt->base = *pt;
+	mt->base.refcount = 1;
+	mt->base.screen = pscreen;
+
+	nv40_miptree_layout(mt);
+
+	mt->buffer = ws->buffer_create(ws, 256,
+				       PIPE_BUFFER_USAGE_PIXEL |
+				       NOUVEAU_BUFFER_USAGE_TEXTURE,
+				       mt->total_size);
+	if (!mt->buffer) {
+		FREE(mt);
+		return NULL;
+	}
+
+	return &mt->base;
+}
+
+static void
+nv40_miptree_release(struct pipe_screen *pscreen, struct pipe_texture **pt)
+{
+	struct pipe_winsys *ws = pscreen->winsys;
+	struct pipe_texture *mt = *pt;
+
+	*pt = NULL;
+	if (--mt->refcount <= 0) {
+		struct nv40_miptree *nv40mt = (struct nv40_miptree *)mt;
+		int l;
+
+		pipe_buffer_reference(ws, &nv40mt->buffer, NULL);
+		for (l = 0; l <= mt->last_level; l++) {
+			if (nv40mt->level[l].image_offset)
+				FREE(nv40mt->level[l].image_offset);
+		}
+		FREE(nv40mt);
+	}
+}
+
+static void
+nv40_miptree_update(struct pipe_context *pipe, struct pipe_texture *mt,
+		    uint face, uint levels)
+{
+}
+
+static struct pipe_surface *
+nv40_miptree_surface(struct pipe_screen *pscreen, struct pipe_texture *pt,
+                     unsigned face, unsigned level, unsigned zslice)
+{
+	struct pipe_winsys *ws = pscreen->winsys;
+	struct nv40_miptree *nv40mt = (struct nv40_miptree *)pt;
+	struct pipe_surface *ps;
+
+	ps = ws->surface_alloc(ws);
+	if (!ps)
+		return NULL;
+	pipe_buffer_reference(ws, &ps->buffer, nv40mt->buffer);
+	ps->format = pt->format;
+	ps->cpp = pt->cpp;
+	ps->width = pt->width[level];
+	ps->height = pt->height[level];
+	ps->pitch = nv40mt->level[level].pitch / ps->cpp;
+
+	if (pt->target == PIPE_TEXTURE_CUBE) {
+		ps->offset = nv40mt->level[level].image_offset[face];
+	} else
+	if (pt->target == PIPE_TEXTURE_3D) {
+		ps->offset = nv40mt->level[level].image_offset[zslice];
+	} else {
+		ps->offset = nv40mt->level[level].image_offset[0];
+	}
+
+	return ps;
+}
+
+void
+nv40_init_miptree_functions(struct nv40_context *nv40)
+{
+	nv40->pipe.texture_update = nv40_miptree_update;
+}
+
+void
+nv40_screen_init_miptree_functions(struct pipe_screen *pscreen)
+{
+	pscreen->texture_create = nv40_miptree_create;
+	pscreen->texture_release = nv40_miptree_release;
+	pscreen->get_tex_surface = nv40_miptree_surface;
+}
+