diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_generate_mipmap.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_generate_mipmap.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_generate_mipmap.c b/src/mesa/drivers/dri/i965/brw_generate_mipmap.c new file mode 100644 index 00000000000..32c2933f721 --- /dev/null +++ b/src/mesa/drivers/dri/i965/brw_generate_mipmap.c @@ -0,0 +1,127 @@ +/* + * Copyright © 2016 Intel Corporation + * + * 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, sublicense, + * 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 NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS 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/mipmap.h" +#include "main/teximage.h" +#include "brw_blorp.h" +#include "brw_context.h" +#include "intel_tex.h" +#include "drivers/common/meta.h" + +#define FILE_DEBUG_FLAG DEBUG_BLORP + + +/** + * The GenerateMipmap() driver hook. + */ +void +brw_generate_mipmap(struct gl_context *ctx, GLenum target, + struct gl_texture_object *tex_obj) +{ + struct brw_context *brw = brw_context(ctx); + struct gen_device_info *devinfo = &brw->screen->devinfo; + struct intel_texture_object *intel_obj = intel_texture_object(tex_obj); + const unsigned base_level = tex_obj->BaseLevel; + unsigned last_level, first_layer, last_layer; + + /* Blorp doesn't handle combined depth/stencil surfaces on Gen4-5 yet. */ + if (devinfo->gen <= 5 && + (tex_obj->Image[0][base_level]->_BaseFormat == GL_DEPTH_COMPONENT || + tex_obj->Image[0][base_level]->_BaseFormat == GL_DEPTH_STENCIL)) { + _mesa_meta_GenerateMipmap(ctx, target, tex_obj); + return; + } + + /* find expected last mipmap level to generate */ + last_level = _mesa_compute_num_levels(ctx, tex_obj, target) - 1; + + if (last_level == 0) + return; + + /* The texture isn't in a "complete" state yet so set the expected + * last_level here; we're not going through normal texture validation. + */ + intel_obj->_MaxLevel = last_level; + + if (!tex_obj->Immutable) { + _mesa_prepare_mipmap_levels(ctx, tex_obj, base_level, last_level); + + /* 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. + */ + intel_finalize_mipmap_tree(brw, tex_obj); + } + + struct intel_mipmap_tree *mt = intel_obj->mt; + if (!mt) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "mipmap generation"); + return; + } + + const mesa_format format = intel_obj->_Format; + + /* Fall back to the CPU for non-renderable cases. + * + * TODO: 3D textures require blending data from multiple slices, + * which means we need custom shaders. For now, fall back. + */ + if (!brw->mesa_format_supports_render[format] || target == GL_TEXTURE_3D) { + _mesa_generate_mipmap(ctx, target, tex_obj); + return; + } + + const struct isl_extent4d *base_size = &mt->surf.logical_level0_px; + + if (mt->target == GL_TEXTURE_CUBE_MAP) { + first_layer = _mesa_tex_target_to_face(target); + last_layer = first_layer; + } else { + first_layer = 0; + last_layer = base_size->array_len - 1; + } + + for (unsigned dst_level = base_level + 1; + dst_level <= last_level; + dst_level++) { + + const unsigned src_level = dst_level - 1; + + for (unsigned layer = first_layer; layer <= last_layer; layer++) { + brw_blorp_blit_miptrees(brw, mt, src_level, layer, format, + SWIZZLE_XYZW, mt, dst_level, layer, format, + 0, 0, + minify(base_size->width, src_level), + minify(base_size->height, src_level), + 0, 0, + minify(base_size->width, dst_level), + minify(base_size->height, dst_level), + GL_LINEAR, false, false, + true, true); + } + } +} |