| /************************************************************************** |
| * |
| * Copyright 2008 VMware, Inc. |
| * All Rights Reserved. |
| * Copyright 2008 VMware, Inc. All rights reserved. |
| * Copyright 2014 Advanced Micro Devices, Inc. |
| * |
| * 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. |
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| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| /** |
| * @file |
| * Mipmap generation utility |
| * |
| * @author Brian Paul, Marek Olšák |
| */ |
| |
| |
| #include "util/u_gen_mipmap.h" |
| #include "util/u_format.h" |
| #include "util/u_inlines.h" |
| |
| |
| /** |
| * Generate mipmap images. It's assumed all needed texture memory is |
| * already allocated. |
| * |
| * \param pt the texture to generate mipmap levels for |
| * \param format format of texture |
| * \param first_layer the first layer to generate mipmap levels for |
| * (ignored for 3D textures) |
| * \param last_layer the last layer to generate mipmap levels for |
| * (ignored for 3D textures) |
| * \param base_level the first mipmap level to use as a src |
| * \param last_level the last mipmap level to generate |
| * \param filter the minification filter used to generate mipmap levels with |
| * one of PIPE_TEX_FILTER_LINEAR, PIPE_TEX_FILTER_NEAREST |
| */ |
| boolean |
| util_gen_mipmap(struct pipe_context *pipe, struct pipe_resource *pt, |
| enum pipe_format format, uint base_level, uint last_level, |
| uint first_layer, uint last_layer, uint filter) |
| { |
| struct pipe_screen *screen = pipe->screen; |
| struct pipe_blit_info blit; |
| uint dstLevel; |
| boolean is_zs = util_format_is_depth_or_stencil(format); |
| boolean has_depth = |
| util_format_has_depth(util_format_description(format)); |
| |
| /* nothing to do for stencil-only formats */ |
| if (is_zs && !has_depth) |
| return TRUE; |
| |
| /* nothing to do for integer formats */ |
| if (!is_zs && util_format_is_pure_integer(format)) |
| return TRUE; |
| |
| if (!screen->is_format_supported(screen, format, pt->target, |
| pt->nr_samples, pt->nr_storage_samples, |
| PIPE_BIND_SAMPLER_VIEW | |
| (is_zs ? PIPE_BIND_DEPTH_STENCIL : |
| PIPE_BIND_RENDER_TARGET))) { |
| return FALSE; |
| } |
| |
| /* The texture object should have room for the levels which we're |
| * about to generate. |
| */ |
| assert(last_level <= pt->last_level); |
| |
| /* If this fails, why are we here? */ |
| assert(last_level > base_level); |
| assert(filter == PIPE_TEX_FILTER_LINEAR || |
| filter == PIPE_TEX_FILTER_NEAREST); |
| |
| memset(&blit, 0, sizeof(blit)); |
| blit.src.resource = blit.dst.resource = pt; |
| blit.src.format = blit.dst.format = format; |
| /* don't set the stencil mask, stencil shouldn't be changed */ |
| blit.mask = is_zs ? PIPE_MASK_Z : PIPE_MASK_RGBA; |
| blit.filter = filter; |
| |
| for (dstLevel = base_level + 1; dstLevel <= last_level; dstLevel++) { |
| blit.src.level = dstLevel - 1; |
| blit.dst.level = dstLevel; |
| |
| blit.src.box.width = u_minify(pt->width0, blit.src.level); |
| blit.src.box.height = u_minify(pt->height0, blit.src.level); |
| |
| blit.dst.box.width = u_minify(pt->width0, blit.dst.level); |
| blit.dst.box.height = u_minify(pt->height0, blit.dst.level); |
| |
| if (pt->target == PIPE_TEXTURE_3D) { |
| /* generate all layers/slices at once */ |
| blit.src.box.z = blit.dst.box.z = 0; |
| blit.src.box.depth = util_num_layers(pt, blit.src.level); |
| blit.dst.box.depth = util_num_layers(pt, blit.dst.level); |
| } |
| else { |
| blit.src.box.z = blit.dst.box.z = first_layer; |
| blit.src.box.depth = blit.dst.box.depth = |
| (last_layer + 1 - first_layer); |
| } |
| |
| pipe->blit(pipe, &blit); |
| } |
| return TRUE; |
| } |