texture object construction

1 files changed, 101 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_texobj.c b/src/mesa/state_tracker/st_texobj.c
new file mode 100644
index 0000000000..455e89b6bd
--- /dev/null
+++ b/src/mesa/state_tracker/st_texobj.c
@@ -0,0 +1,101 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 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.
+ * 
+ **************************************************************************/
+
+/*
+ * Authors:
+ *   Brian Paul
+ */
+
+#include "imports.h"
+#include "texformat.h"
+
+#include "st_context.h"
+#include "st_texobj.h"
+#include "pipe/p_defines.h"
+
+
+/**
+ * Create a pipe_texture_object from a Mesa texture object.
+ * Eventually, gl_texture_object may be derived from this...
+ */
+struct pipe_texture_object *
+create_texture_object(struct gl_texture_object *texObj)
+{
+   struct pipe_texture_object *pto;
+   const struct gl_texture_image *texImage;
+
+   pto = calloc(1, sizeof(*pto));
+   if (!pto)
+      return NULL;
+
+   assert(texObj->Complete);
+
+   switch (texObj->Target) {
+   case GL_TEXTURE_1D:
+      pto->type = PIPE_TEXTURE_1D;
+      break;
+   case GL_TEXTURE_2D:
+      pto->type = PIPE_TEXTURE_2D;
+      break;
+   case GL_TEXTURE_3D:
+      pto->type = PIPE_TEXTURE_3D;
+      break;
+   case GL_TEXTURE_CUBE_MAP:
+      pto->type = PIPE_TEXTURE_CUBE;
+      break;
+   default:
+      assert(0);
+      return NULL;
+   }
+
+   texImage = texObj->Image[0][texObj->BaseLevel];
+   assert(texImage);
+
+   switch (texImage->TexFormat->MesaFormat) {
+   case MESA_FORMAT_RGBA8888:
+      pto->format = PIPE_FORMAT_U_R8_G8_B8_A8;
+      break;
+   case MESA_FORMAT_RGB565:
+      pto->format = PIPE_FORMAT_U_R5_G6_B5;
+      break;
+
+   /* XXX fill in more formats */
+
+   default:
+      assert(0);
+      return NULL;
+   }
+
+   pto->width = texImage->Width;
+   pto->height = texImage->Height;
+   pto->depth = texImage->Depth;
+
+   /* XXX verify this */
+   pto->mipmapped = texObj->Image[0][texObj->BaseLevel + 1] != NULL;
+
+   return pto;
+}