0,0 → 1,109 |
/************************************************************************** |
* |
* Copyright 2010 VMware, Inc. |
* 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 VMWARE 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 "u_format.h" |
#include "u_sampler.h" |
|
|
/** |
* Initialize a pipe_sampler_view. 'view' is considered to have |
* uninitialized contents. |
*/ |
static void |
default_template(struct pipe_sampler_view *view, |
const struct pipe_resource *texture, |
enum pipe_format format, |
unsigned expand_green_blue) |
{ |
memset(view, 0, sizeof(*view)); |
|
/* XXX: Check if format is compatible with texture->format. |
*/ |
|
view->format = format; |
view->u.tex.first_level = 0; |
view->u.tex.last_level = texture->last_level; |
view->u.tex.first_layer = 0; |
view->u.tex.last_layer = texture->target == PIPE_TEXTURE_3D ? |
texture->depth0 - 1 : texture->array_size - 1; |
view->swizzle_r = PIPE_SWIZZLE_RED; |
view->swizzle_g = PIPE_SWIZZLE_GREEN; |
view->swizzle_b = PIPE_SWIZZLE_BLUE; |
view->swizzle_a = PIPE_SWIZZLE_ALPHA; |
|
/* Override default green and blue component expansion to the requested |
* one. |
* |
* Gallium expands nonexistent components to (0,0,0,1), DX9 expands |
* to (1,1,1,1). Since alpha is always expanded to 1, and red is |
* always present, we only really care about green and blue |
* components. |
* |
* To make it look less hackish, one would have to add |
* UTIL_FORMAT_SWIZZLE_EXPAND to indicate components for expansion |
* and then override without exceptions or favoring one component |
* over another. |
*/ |
if (format != PIPE_FORMAT_A8_UNORM) { |
const struct util_format_description *desc = util_format_description(format); |
|
assert(desc); |
if (desc) { |
if (desc->swizzle[1] == UTIL_FORMAT_SWIZZLE_0) { |
view->swizzle_g = expand_green_blue; |
} |
if (desc->swizzle[2] == UTIL_FORMAT_SWIZZLE_0) { |
view->swizzle_b = expand_green_blue; |
} |
} |
} |
} |
|
void |
u_sampler_view_default_template(struct pipe_sampler_view *view, |
const struct pipe_resource *texture, |
enum pipe_format format) |
{ |
/* Expand to (0, 0, 0, 1) */ |
default_template(view, |
texture, |
format, |
PIPE_SWIZZLE_ZERO); |
} |
|
void |
u_sampler_view_default_dx9_template(struct pipe_sampler_view *view, |
const struct pipe_resource *texture, |
enum pipe_format format) |
{ |
/* Expand to (1, 1, 1, 1) */ |
default_template(view, |
texture, |
format, |
PIPE_SWIZZLE_ONE); |
} |