From e96a52e9933eea7264a42983db1428368bcb4962 Mon Sep 17 00:00:00 2001
From: Francisco Jerez <currojerez@riseup.net>
Date: Wed, 28 Jul 2010 18:37:24 +0200
Subject: dri/nouveau: Fix up software mipmap generation.

---
 src/mesa/drivers/dri/nouveau/nouveau_texture.c | 49 ++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

(limited to 'src/mesa/drivers/dri/nouveau/nouveau_texture.c')

diff --git a/src/mesa/drivers/dri/nouveau/nouveau_texture.c b/src/mesa/drivers/dri/nouveau/nouveau_texture.c
index dbf9a5cc61..79b6757586 100644
--- a/src/mesa/drivers/dri/nouveau/nouveau_texture.c
+++ b/src/mesa/drivers/dri/nouveau/nouveau_texture.c
@@ -38,6 +38,7 @@
 #include "main/mipmap.h"
 #include "main/texfetch.h"
 #include "main/teximage.h"
+#include "drivers/common/meta.h"
 
 static struct gl_texture_object *
 nouveau_texture_new(GLcontext *ctx, GLuint name, GLenum target)
@@ -589,6 +590,53 @@ nouveau_texture_unmap(GLcontext *ctx, struct gl_texture_object *t)
 	}
 }
 
+static void
+store_mipmap(GLcontext *ctx, GLenum target, int first, int last,
+	     struct gl_texture_object *t)
+{
+	struct gl_pixelstore_attrib packing = {
+		.BufferObj = ctx->Shared->NullBufferObj,
+		.Alignment = 1
+	};
+	GLenum format = t->Image[0][first]->TexFormat;
+	unsigned base_format, type, comps;
+	int i;
+
+	base_format = _mesa_get_format_base_format(format);
+	_mesa_format_to_type_and_comps(format, &type, &comps);
+
+	for (i = first; i <= last; i++) {
+		struct gl_texture_image *ti = t->Image[0][i];
+		void *data = ti->Data;
+
+		nouveau_teximage(ctx, 3, target, i, ti->InternalFormat,
+				 ti->Width, ti->Height, ti->Depth,
+				 ti->Border, base_format, type, data,
+				 &packing, t, ti);
+
+		_mesa_free_texmemory(data);
+	}
+}
+
+static void
+nouveau_generate_mipmap(GLcontext *ctx, GLenum target,
+			struct gl_texture_object *t)
+{
+	if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, t)) {
+		struct gl_texture_image *base = t->Image[0][t->BaseLevel];
+
+		nouveau_teximage_map(ctx, base);
+		_mesa_generate_mipmap(ctx, target, t);
+		nouveau_teximage_unmap(ctx, base);
+
+		store_mipmap(ctx, target, t->BaseLevel + 1,
+			     get_last_level(t), t);
+
+	} else {
+		_mesa_meta_GenerateMipmap(ctx, target, t);
+	}
+}
+
 void
 nouveau_texture_functions_init(struct dd_function_table *functions)
 {
@@ -607,4 +655,5 @@ nouveau_texture_functions_init(struct dd_function_table *functions)
 	functions->BindTexture = nouveau_bind_texture;
 	functions->MapTexture = nouveau_texture_map;
 	functions->UnmapTexture = nouveau_texture_unmap;
+	functions->GenerateMipmap = nouveau_generate_mipmap;
 }
-- 
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