1 files changed, 209 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_gen_mipmap.c b/src/mesa/state_tracker/st_gen_mipmap.c
new file mode 100644
index 00000000000..6a3455aaba2
--- /dev/null
+++ b/src/mesa/state_tracker/st_gen_mipmap.c
@@ -0,0 +1,209 @@
+/**************************************************************************
+ * 
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+
+#include "main/imports.h"
+#include "main/mipmap.h"
+#include "main/teximage.h"
+#include "main/texformat.h"
+
+#include "shader/prog_instruction.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_inlines.h"
+#include "util/u_gen_mipmap.h"
+
+#include "cso_cache/cso_cache.h"
+#include "cso_cache/cso_context.h"
+
+#include "st_context.h"
+#include "st_draw.h"
+#include "st_gen_mipmap.h"
+#include "st_program.h"
+#include "st_texture.h"
+#include "st_cb_texture.h"
+
+
+/**
+ * one-time init for generate mipmap
+ * XXX Note: there may be other times we need no-op/simple state like this.
+ * In that case, some code refactoring would be good.
+ */
+void
+st_init_generate_mipmap(struct st_context *st)
+{
+   st->gen_mipmap = util_create_gen_mipmap(st->pipe, st->cso_context);
+}
+
+
+void
+st_destroy_generate_mipmap(struct st_context *st)
+{
+   util_destroy_gen_mipmap(st->gen_mipmap);
+   st->gen_mipmap = NULL;
+}
+
+
+/**
+ * Generate mipmap levels using hardware rendering.
+ * \return TRUE if successful, FALSE if not possible
+ */
+static boolean
+st_render_mipmap(struct st_context *st,
+                 GLenum target,
+                 struct pipe_texture *pt,
+                 uint baseLevel, uint lastLevel)
+{
+   struct pipe_context *pipe = st->pipe;
+   struct pipe_screen *screen = pipe->screen;
+   const uint face = _mesa_tex_target_to_face(target);
+
+   assert(target != GL_TEXTURE_3D); /* not done yet */
+
+   /* check if we can render in the texture's format */
+   if (!screen->is_format_supported(screen, pt->format, target,
+                                    PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) {
+      return FALSE;
+   }
+
+   util_gen_mipmap(st->gen_mipmap, pt, face, baseLevel, lastLevel,
+                   PIPE_TEX_FILTER_LINEAR);
+
+   return TRUE;
+}
+
+
+static void
+fallback_generate_mipmap(GLcontext *ctx, GLenum target,
+                         struct gl_texture_object *texObj)
+{
+   struct pipe_context *pipe = ctx->st->pipe;
+   struct pipe_screen *screen = pipe->screen;
+   struct pipe_texture *pt = st_get_texobj_texture(texObj);
+   const uint baseLevel = texObj->BaseLevel;
+   const uint lastLevel = pt->last_level;
+   const uint face = _mesa_tex_target_to_face(target), zslice = 0;
+   uint dstLevel;
+   GLenum datatype;
+   GLuint comps;
+
+   assert(target != GL_TEXTURE_3D); /* not done yet */
+
+   _mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat,
+                                  &datatype, &comps);
+
+   for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
+      const uint srcLevel = dstLevel - 1;
+      struct pipe_surface *srcSurf, *dstSurf;
+      const ubyte *srcData;
+      ubyte *dstData;
+
+      srcSurf = screen->get_tex_surface(screen, pt, face, srcLevel, zslice,
+                                        PIPE_BUFFER_USAGE_CPU_READ);
+      dstSurf = screen->get_tex_surface(screen, pt, face, dstLevel, zslice,
+                                        PIPE_BUFFER_USAGE_CPU_WRITE);
+
+      srcData = (ubyte *) pipe_surface_map(srcSurf,
+                                           PIPE_BUFFER_USAGE_CPU_READ)
+              + srcSurf->offset;
+      dstData = (ubyte *) pipe_surface_map(dstSurf,
+                                           PIPE_BUFFER_USAGE_CPU_WRITE)
+              + dstSurf->offset;
+
+      _mesa_generate_mipmap_level(target, datatype, comps,
+                   0 /*border*/,
+                   pt->width[srcLevel], pt->height[srcLevel], pt->depth[srcLevel],
+                   srcData,
+                   srcSurf->stride, /* stride in bytes */
+                   pt->width[dstLevel], pt->height[dstLevel], pt->depth[dstLevel],
+                   dstData,
+                   dstSurf->stride); /* stride in bytes */
+
+      pipe_surface_unmap(srcSurf);
+      pipe_surface_unmap(dstSurf);
+
+      pipe_surface_reference(&srcSurf, NULL);
+      pipe_surface_reference(&dstSurf, NULL);
+   }
+}
+
+
+void
+st_generate_mipmap(GLcontext *ctx, GLenum target,
+                   struct gl_texture_object *texObj)
+{
+   struct st_context *st = ctx->st;
+   struct pipe_texture *pt = st_get_texobj_texture(texObj);
+   const uint baseLevel = texObj->BaseLevel;
+   uint lastLevel;
+   uint dstLevel;
+
+   if (!pt)
+      return;
+
+   lastLevel = pt->last_level;
+
+   if (!st_render_mipmap(st, target, pt, baseLevel, lastLevel)) {
+      fallback_generate_mipmap(ctx, target, texObj);
+   }
+
+   /* Fill in the Mesa gl_texture_image fields */
+   for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) {
+      const uint srcLevel = dstLevel - 1;
+      const struct gl_texture_image *srcImage
+         = _mesa_get_tex_image(ctx, texObj, target, srcLevel);
+      struct gl_texture_image *dstImage;
+      struct st_texture_image *stImage;
+      uint dstWidth = pt->width[dstLevel];
+      uint dstHeight = pt->height[dstLevel];
+      uint dstDepth = pt->depth[dstLevel];
+      uint border = srcImage->Border;
+
+      dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel);
+      if (!dstImage) {
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps");
+         return;
+      }
+
+      if (dstImage->ImageOffsets)
+         _mesa_free(dstImage->ImageOffsets);
+
+      /* Free old image data */
+      if (dstImage->Data)
+         ctx->Driver.FreeTexImageData(ctx, dstImage);
+
+      /* initialize new image */
+      _mesa_init_teximage_fields(ctx, target, dstImage, dstWidth, dstHeight,
+                                 dstDepth, border, srcImage->InternalFormat);
+
+      dstImage->TexFormat = srcImage->TexFormat;
+
+      stImage = (struct st_texture_image *) dstImage;
+      pipe_texture_reference(&stImage->pt, pt);
+   }
+}