| /************************************************************************** |
| * |
| * 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. |
| * |
| **************************************************************************/ |
| |
| |
| #include "main/imports.h" |
| #include "main/mipmap.h" |
| #include "main/teximage.h" |
| |
| #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" |
| |
| #include "st_debug.h" |
| #include "st_context.h" |
| #include "st_texture.h" |
| #include "st_gen_mipmap.h" |
| #include "st_cb_bitmap.h" |
| #include "st_cb_texture.h" |
| |
| |
| /** |
| * 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; |
| |
| baseImage = _mesa_get_tex_image(ctx, texObj, target, texObj->BaseLevel); |
| |
| numLevels = texObj->BaseLevel + baseImage->MaxNumLevels; |
| numLevels = MIN2(numLevels, (GLuint) texObj->MaxLevel + 1); |
| if (texObj->Immutable) |
| numLevels = MIN2(numLevels, texObj->NumLevels); |
| assert(numLevels >= 1); |
| |
| return numLevels; |
| } |
| |
| |
| /** |
| * 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; |
| enum pipe_format format; |
| uint lastLevel, first_layer, last_layer; |
| |
| if (!pt) |
| return; |
| |
| /* not sure if this ultimately actually should work, |
| but we're not supporting multisampled textures yet. */ |
| assert(pt->nr_samples < 2); |
| |
| /* find expected last mipmap level to generate*/ |
| lastLevel = compute_num_levels(ctx, texObj, target) - 1; |
| |
| if (lastLevel == 0) |
| return; |
| |
| st_flush_bitmap_cache(st); |
| st_invalidate_readpix_cache(st); |
| |
| /* 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; |
| |
| if (!texObj->Immutable) { |
| const GLboolean genSave = texObj->GenerateMipmap; |
| |
| /* Temporarily set GenerateMipmap to true so that allocate_full_mipmap() |
| * makes the right decision about full mipmap allocation. |
| */ |
| texObj->GenerateMipmap = GL_TRUE; |
| |
| _mesa_prepare_mipmap_levels(ctx, texObj, baseLevel, lastLevel); |
| |
| texObj->GenerateMipmap = genSave; |
| |
| /* At this point, memory for all the texture levels has been |
| * allocated. However, the base level image may be in one resource |
| * while the subsequent/smaller levels may be in another resource. |
| * Finalizing the texture will copy the base images from the former |
| * resource to the latter. |
| * |
| * After this, we'll have all mipmap levels in one resource. |
| */ |
| st_finalize_texture(ctx, st->pipe, texObj); |
| } |
| |
| pt = stObj->pt; |
| if (!pt) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "mipmap generation"); |
| return; |
| } |
| |
| assert(pt->last_level >= lastLevel); |
| |
| 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); |
| } |
| |
| if (stObj->surface_based) |
| format = stObj->surface_format; |
| else |
| format = pt->format; |
| |
| /* First see if the driver supports hardware mipmap generation, |
| * if not then generate the mipmap by rendering/texturing. |
| * If that fails, use the software fallback. |
| */ |
| if (!st->pipe->screen->get_param(st->pipe->screen, |
| PIPE_CAP_GENERATE_MIPMAP) || |
| !st->pipe->generate_mipmap(st->pipe, pt, format, baseLevel, |
| lastLevel, first_layer, last_layer)) { |
| |
| if (!util_gen_mipmap(st->pipe, pt, format, baseLevel, lastLevel, |
| first_layer, last_layer, PIPE_TEX_FILTER_LINEAR)) { |
| _mesa_generate_mipmap(ctx, target, texObj); |
| } |
| } |
| } |