1 files changed, 109 insertions, 0 deletions
diff --git a/src/gallium/drivers/nv50/nv50_miptree.c b/src/gallium/drivers/nv50/nv50_miptree.c
new file mode 100644
index 0000000000..f936a1f0e2
--- /dev/null
+++ b/src/gallium/drivers/nv50/nv50_miptree.c
@@ -0,0 +1,109 @@
+#include "pipe/p_state.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_util.h"
+#include "pipe/p_inlines.h"
+
+#include "nv50_context.h"
+
+static struct pipe_texture *
+nv50_miptree_create(struct pipe_screen *pscreen, const struct pipe_texture *pt)
+{
+	struct pipe_winsys *ws = pscreen->winsys;
+	struct nv50_miptree *mt = CALLOC_STRUCT(nv50_miptree);
+	unsigned usage, pitch;
+
+	mt->base = *pt;
+	mt->base.refcount = 1;
+	mt->base.screen = pscreen;
+
+	usage = PIPE_BUFFER_USAGE_PIXEL;
+	switch (pt->format) {
+	case PIPE_FORMAT_Z24S8_UNORM:
+	case PIPE_FORMAT_Z16_UNORM:
+		usage |= NOUVEAU_BUFFER_USAGE_ZETA;
+		break;
+	default:
+		break;
+	}
+
+	pitch = ((pt->width[0] + 63) & ~63) * pt->block.size;
+
+	mt->buffer = ws->buffer_create(ws, 256, usage, pitch * pt->height[0]);
+	if (!mt->buffer) {
+		FREE(mt);
+		return NULL;
+	}
+
+	return &mt->base;
+}
+
+static void
+nv50_miptree_release(struct pipe_screen *pscreen, struct pipe_texture **ppt)
+{
+	struct pipe_winsys *ws = pscreen->winsys;
+	struct pipe_texture *pt = *ppt;
+
+	*ppt = NULL;
+
+	if (--pt->refcount <= 0) {
+		struct nv50_miptree *mt = nv50_miptree(pt);
+
+		pipe_buffer_reference(ws, &mt->buffer, NULL);
+		FREE(mt);
+	}
+}
+
+static struct pipe_surface *
+nv50_miptree_surface_new(struct pipe_screen *pscreen, struct pipe_texture *pt,
+			 unsigned face, unsigned level, unsigned zslice,
+			 unsigned flags)
+{
+	struct pipe_winsys *ws = pscreen->winsys;
+	struct nv50_miptree *mt = nv50_miptree(pt);
+	struct pipe_surface *ps;
+
+	ps = CALLOC_STRUCT(pipe_surface);
+	ps->refcount = 1;
+	ps->winsys = ws;
+	ps->format = pt->format;
+	ps->width = pt->width[level];
+	ps->height = pt->height[level];
+	ps->block = pt->block;
+	ps->nblocksx = pt->nblocksx[level];
+	ps->nblocksy = pt->nblocksy[level];
+	ps->stride = ps->width * ps->block.size;
+	ps->offset = 0;
+	ps->usage = flags;
+	ps->status = PIPE_SURFACE_STATUS_DEFINED;
+
+	pipe_texture_reference(&ps->texture, pt);
+	pipe_buffer_reference(ws, &ps->buffer, mt->buffer);
+
+	return ps;
+}
+
+static void
+nv50_miptree_surface_del(struct pipe_screen *pscreen,
+			 struct pipe_surface **psurface)
+{
+	struct pipe_winsys *ws = pscreen->winsys;
+	struct pipe_surface *surf = *psurface;
+
+	*psurface = NULL;
+
+	if (--surf->refcount <= 0) {
+		pipe_texture_reference(&surf->texture, NULL);
+		pipe_buffer_reference(ws, &surf->buffer, NULL);
+		FREE(surf);
+	}
+}
+
+void
+nv50_screen_init_miptree_functions(struct pipe_screen *pscreen)
+{
+	pscreen->texture_create = nv50_miptree_create;
+	pscreen->texture_release = nv50_miptree_release;
+	pscreen->get_tex_surface = nv50_miptree_surface_new;
+	pscreen->tex_surface_release = nv50_miptree_surface_del;
+}
+