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
  35 #include "main/texgetimage.h"
  36
  37 /**
  38  * Need to map texture image into memory before copying image data,
  39  * then unmap it.
  40  */
  41 static void
  42 radeon_get_tex_image(GLcontext * ctx, GLenum target, GLint level,
  43              GLenum format, GLenum type, GLvoid * pixels,
  44              struct gl_texture_object *texObj,
  45              struct gl_texture_image *texImage, int compressed)
  46 {
  47     radeon_texture_image *image = get_radeon_texture_image(texImage);
  48
  49     radeon_print(RADEON_TEXTURE, RADEON_NORMAL,
  50                  "%s(%p, tex %p, image %p) compressed %d.\n",
  51                  __func__, ctx, texObj, image, compressed);
  52
  53     if (image->mt) {
  54         /* Map the texture image read-only */
  55         radeon_teximage_map(image, GL_FALSE);
  56     } else {
  57         /* Image hasn't been uploaded to a miptree yet */
  58         assert(image->base.Data);
  59     }
  60
  61     if (compressed) {
  62         /* FIXME: this can't work for small textures (mips) which
  63                  use different hw stride */
  64         _mesa_get_compressed_teximage(ctx, target, level, pixels,
  65                           texObj, texImage);
  66     } else {
  67         _mesa_get_teximage(ctx, target, level, format, type, pixels,
  68                    texObj, texImage);
  69     }
  70
  71     if (image->mt) {
  72         radeon_teximage_unmap(image);
  73     }
  74 }
  75
  76 void
  77 radeonGetTexImage(GLcontext * ctx, GLenum target, GLint level,
  78           GLenum format, GLenum type, GLvoid * pixels,
  79           struct gl_texture_object *texObj,
  80           struct gl_texture_image *texImage)
  81 {
  82     radeon_get_tex_image(ctx, target, level, format, type, pixels,
  83                  texObj, texImage, 0);
  84 }
  85
  86 void
  87 radeonGetCompressedTexImage(GLcontext *ctx, GLenum target, GLint level,
  88                 GLvoid *pixels,
  89                 struct gl_texture_object *texObj,
  90                 struct gl_texture_image *texImage)
  91 {
  92     radeon_get_tex_image(ctx, target, level, 0, 0, pixels,
  93                  texObj, texImage, 1);
  94 }