diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_tex_layout.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_tex_layout.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_tex_layout.c b/src/mesa/drivers/dri/i965/brw_tex_layout.c new file mode 100644 index 00000000000..f8aa068241b --- /dev/null +++ b/src/mesa/drivers/dri/i965/brw_tex_layout.c @@ -0,0 +1,162 @@ +/* + Copyright (C) Intel Corp. 2006. All Rights Reserved. + Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to + develop this 3D driver. + + 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 COPYRIGHT OWNER(S) 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. + + **********************************************************************/ + /* + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + */ + + +/* Code to layout images in a mipmap tree for i965. + */ + +#include "intel_mipmap_tree.h" +#include "macros.h" + +static GLuint minify( GLuint d ) +{ + return MAX2(1, d>>1); +} + + +GLboolean brw_miptree_layout( struct intel_mipmap_tree *mt ) +{ + /* XXX: these vary depending on image format: + */ +/* GLint align_w = 4; */ + GLint align_h = 2; + + + switch (mt->target) { + case GL_TEXTURE_CUBE_MAP: + case GL_TEXTURE_3D: { + GLuint width = mt->width0; + GLuint height = mt->height0; + GLuint depth = mt->depth0; + GLuint pack_x_pitch, pack_x_nr; + GLuint pack_y_pitch; + GLuint level; + + mt->pitch = ((mt->width0 * mt->cpp + 3) & ~3) / mt->cpp; + mt->total_height = 0; + + pack_y_pitch = MAX2(mt->height0, 2); + pack_x_pitch = mt->pitch; + pack_x_nr = 1; + + for ( level = mt->first_level ; level <= mt->last_level ; level++ ) { + GLuint nr_images = mt->target == GL_TEXTURE_3D ? depth : 6; + GLint x = 0; + GLint y = 0; + GLint q, j; + + intel_miptree_set_level_info(mt, level, nr_images, + 0, mt->total_height, + width, height, depth); + + for (q = 0; q < nr_images;) { + for (j = 0; j < pack_x_nr && q < nr_images; j++, q++) { + intel_miptree_set_image_offset(mt, level, q, x, y); + x += pack_x_pitch; + } + + x = 0; + y += pack_y_pitch; + } + + + mt->total_height += y; + + if (pack_x_pitch > 4) { + pack_x_pitch >>= 1; + pack_x_nr <<= 1; + assert(pack_x_pitch * pack_x_nr <= mt->pitch); + } + + if (pack_y_pitch > 2) { + pack_y_pitch >>= 1; + } + + width = minify(width); + height = minify(height); + depth = minify(depth); + } + break; + } + + default: { + GLuint level; + GLuint x = 0; + GLuint y = 0; + GLuint width = mt->width0; + GLuint height = mt->height0; + + mt->pitch = ((mt->width0 * mt->cpp + 3) & ~3) / mt->cpp; + mt->total_height = 0; + + for ( level = mt->first_level ; level <= mt->last_level ; level++ ) { + GLuint img_height; + + intel_miptree_set_level_info(mt, level, 1, + x, y, + width, + mt->compressed ? height/4 : height, 1); + + if (mt->compressed) + img_height = MAX2(1, height/4); + else + img_height = MAX2(align_h, height); + + + /* Because the images are packed better, the final offset + * might not be the maximal one: + */ + mt->total_height = MAX2(mt->total_height, y + img_height); + + /* Layout_below: step right after second mipmap. + */ + if (level == mt->first_level + 1) + x += mt->pitch / 2; + else { + y += img_height; + } + + + width = minify(width); + height = minify(height); + } + break; + } + } + DBG("%s: %dx%dx%d - sz 0x%x\n", __FUNCTION__, + mt->pitch, + mt->total_height, + mt->cpp, + mt->pitch * mt->total_height * mt->cpp ); + + return GL_TRUE; +} + |