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/************************************************************************** |
* |
* Copyright 2008 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. |
* |
**************************************************************************/ |
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#include "main/imports.h" |
#include "main/mipmap.h" |
#include "main/teximage.h" |
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#include "pipe/p_context.h" |
#include "pipe/p_defines.h" |
#include "util/u_inlines.h" |
#include "util/u_format.h" |
#include "util/u_gen_mipmap.h" |
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#include "st_debug.h" |
#include "st_context.h" |
#include "st_texture.h" |
#include "st_gen_mipmap.h" |
#include "st_cb_texture.h" |
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/** |
* Compute the expected number of mipmap levels in the texture given |
* the width/height/depth of the base image and the GL_TEXTURE_BASE_LEVEL/ |
* GL_TEXTURE_MAX_LEVEL settings. This will tell us how many mipmap |
* levels should be generated. |
*/ |
static GLuint |
compute_num_levels(struct gl_context *ctx, |
struct gl_texture_object *texObj, |
GLenum target) |
{ |
const struct gl_texture_image *baseImage; |
GLuint numLevels; |
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baseImage = _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel); |
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numLevels = texObj->BaseLevel + baseImage->MaxNumLevels; |
numLevels = MIN2(numLevels, (GLuint) texObj->MaxLevel + 1); |
assert(numLevels >= 1); |
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return numLevels; |
} |
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/** |
* Called via ctx->Driver.GenerateMipmap(). |
*/ |
void |
st_generate_mipmap(struct gl_context *ctx, GLenum target, |
struct gl_texture_object *texObj) |
{ |
struct st_context *st = st_context(ctx); |
struct st_texture_object *stObj = st_texture_object(texObj); |
struct pipe_resource *pt = st_get_texobj_resource(texObj); |
const uint baseLevel = texObj->BaseLevel; |
uint lastLevel, first_layer, last_layer; |
uint dstLevel; |
|
if (!pt) |
return; |
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/* not sure if this ultimately actually should work, |
but we're not supporting multisampled textures yet. */ |
assert(pt->nr_samples < 2); |
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/* find expected last mipmap level to generate*/ |
lastLevel = compute_num_levels(ctx, texObj, target) - 1; |
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if (lastLevel == 0) |
return; |
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/* The texture isn't in a "complete" state yet so set the expected |
* lastLevel here, since it won't get done in st_finalize_texture(). |
*/ |
stObj->lastLevel = lastLevel; |
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if (pt->last_level < lastLevel) { |
/* The current gallium texture doesn't have space for all the |
* mipmap levels we need to generate. So allocate a new texture. |
*/ |
struct pipe_resource *oldTex = stObj->pt; |
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/* create new texture with space for more levels */ |
stObj->pt = st_texture_create(st, |
oldTex->target, |
oldTex->format, |
lastLevel, |
oldTex->width0, |
oldTex->height0, |
oldTex->depth0, |
oldTex->array_size, |
0, |
oldTex->bind); |
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/* This will copy the old texture's base image into the new texture |
* which we just allocated. |
*/ |
st_finalize_texture(ctx, st->pipe, texObj); |
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/* release the old tex (will likely be freed too) */ |
pipe_resource_reference(&oldTex, NULL); |
st_texture_release_all_sampler_views(st, stObj); |
} |
else { |
/* Make sure that the base texture image data is present in the |
* texture buffer. |
*/ |
st_finalize_texture(ctx, st->pipe, texObj); |
} |
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pt = stObj->pt; |
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assert(pt->last_level >= lastLevel); |
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if (pt->target == PIPE_TEXTURE_CUBE) { |
first_layer = last_layer = _mesa_tex_target_to_face(target); |
} |
else { |
first_layer = 0; |
last_layer = util_max_layer(pt, baseLevel); |
} |
|
/* Try to generate the mipmap by rendering/texturing. If that fails, |
* use the software fallback. |
*/ |
if (!util_gen_mipmap(st->pipe, pt, pt->format, baseLevel, lastLevel, |
first_layer, last_layer, PIPE_TEX_FILTER_LINEAR)) { |
_mesa_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 border = srcImage->Border; |
uint dstWidth, dstHeight, dstDepth; |
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dstWidth = u_minify(pt->width0, dstLevel); |
if (texObj->Target == GL_TEXTURE_1D_ARRAY) { |
dstHeight = pt->array_size; |
} |
else { |
dstHeight = u_minify(pt->height0, dstLevel); |
} |
if (texObj->Target == GL_TEXTURE_2D_ARRAY || |
texObj->Target == GL_TEXTURE_CUBE_MAP_ARRAY) { |
dstDepth = pt->array_size; |
} |
else { |
dstDepth = u_minify(pt->depth0, dstLevel); |
} |
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dstImage = _mesa_get_tex_image(ctx, texObj, target, dstLevel); |
if (!dstImage) { |
_mesa_error(ctx, GL_OUT_OF_MEMORY, "generating mipmaps"); |
return; |
} |
|
/* Free old image data */ |
ctx->Driver.FreeTextureImageBuffer(ctx, dstImage); |
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/* initialize new image */ |
_mesa_init_teximage_fields(ctx, dstImage, dstWidth, dstHeight, |
dstDepth, border, srcImage->InternalFormat, |
srcImage->TexFormat); |
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stImage = st_texture_image(dstImage); |
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pipe_resource_reference(&stImage->pt, pt); |
} |
} |