src/mesa/drivers/dri/radeon/radeon_tex_getimage.c

   1 /*
   2  * Copyright (C) 2009 Maciej Cencora.
   3  * Copyright (C) 2008 Nicolai Haehnle.
   4  * Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
   5  *
   6  * The Weather Channel (TM) funded Tungsten Graphics to develop the
   7  * initial release of the Radeon 8500 driver under the XFree86 license.
   8  * This notice must be preserved.
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining
  11  * a copy of this software and associated documentation files (the
  12  * "Software"), to deal in the Software without restriction, including
  13  * without limitation the rights to use, copy, modify, merge, publish,
  14  * distribute, sublicense, and/or sell copies of the Software, and to
  15  * permit persons to whom the Software is furnished to do so, subject to
  16  * the following conditions:
  17  *
  18  * The above copyright notice and this permission notice (including the
  19  * next paragraph) shall be included in all copies or substantial
  20  * portions of the Software.
  21  *
  22  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  25  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  26  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29  *
  30  */
  31
  32 #include "radeon_common_context.h"
  33 #include "radeon_texture.h"
  34 #include "radeon_mipmap_tree.h"
  35
  36 #include "main/texgetimage.h"
  37
  38 /**
  39  * Need to map texture image into memory before copying image data,
  40  * then unmap it.
  41  */
  42 static void
  43 radeon_get_tex_image(GLcontext * ctx, GLenum target, GLint level,
  44              GLenum format, GLenum type, GLvoid * pixels,
  45              struct gl_texture_object *texObj,
  46              struct gl_texture_image *texImage, int compressed)
  47 {
  48     radeon_texture_image *image = get_radeon_texture_image(texImage);
  49
  50     radeon_print(RADEON_TEXTURE, RADEON_NORMAL,
  51                  "%s(%p, tex %p, image %p) compressed %d.\n",
  52                  __func__, ctx, texObj, image, compressed);
  53
  54     if (image->mt) {
  55         /* Map the texture image read-only */
  56         radeon_teximage_map(image, GL_FALSE);
  57     } else {
  58         /* Image hasn't been uploaded to a miptree yet */
  59         assert(image->base.Data);
  60     }
  61
  62     if (compressed) {
  63         /* FIXME: this can't work for small textures (mips) which
  64                  use different hw stride */
  65         _mesa_get_compressed_teximage(ctx, target, level, pixels,
  66                           texObj, texImage);
  67     } else {
  68         _mesa_get_teximage(ctx, target, level, format, type, pixels,
  69                    texObj, texImage);
  70     }
  71
  72     if (image->mt) {
  73         radeon_teximage_unmap(image);
  74     }
  75 }
  76
  77 void
  78 radeonGetTexImage(GLcontext * ctx, GLenum target, GLint level,
  79           GLenum format, GLenum type, GLvoid * pixels,
  80           struct gl_texture_object *texObj,
  81           struct gl_texture_image *texImage)
  82 {
  83     radeon_get_tex_image(ctx, target, level, format, type, pixels,
  84                  texObj, texImage, 0);
  85 }
  86
  87 void
  88 radeonGetCompressedTexImage(GLcontext *ctx, GLenum target, GLint level,
  89                 GLvoid *pixels,
  90                 struct gl_texture_object *texObj,
  91                 struct gl_texture_image *texImage)
  92 {
  93     radeon_get_tex_image(ctx, target, level, 0, 0, pixels,
  94                  texObj, texImage, 1);
  95 }