diff options
Diffstat (limited to 'src/gallium/drivers/i965/intel_tex_layout.c')
-rw-r--r-- | src/gallium/drivers/i965/intel_tex_layout.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965/intel_tex_layout.c b/src/gallium/drivers/i965/intel_tex_layout.c new file mode 100644 index 0000000000..7d69ea4484 --- /dev/null +++ b/src/gallium/drivers/i965/intel_tex_layout.c @@ -0,0 +1,140 @@ +/************************************************************************** + * + * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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 TUNGSTEN GRAPHICS 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> + * Michel Dänzer <michel@tungstengraphics.com> + */ + +#include "intel_mipmap_tree.h" +#include "intel_tex_layout.h" +#include "intel_context.h" +#include "main/macros.h" + +void intel_get_texture_alignment_unit(GLenum internalFormat, GLuint *w, GLuint *h) +{ + switch (internalFormat) { + case GL_COMPRESSED_RGB_FXT1_3DFX: + case GL_COMPRESSED_RGBA_FXT1_3DFX: + *w = 8; + *h = 4; + break; + + case GL_RGB_S3TC: + case GL_RGB4_S3TC: + case GL_COMPRESSED_RGB_S3TC_DXT1_EXT: + case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: + case GL_RGBA_S3TC: + case GL_RGBA4_S3TC: + case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT: + case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT: + *w = 4; + *h = 4; + break; + + default: + *w = 4; + *h = 2; + break; + } +} + +void i945_miptree_layout_2d( struct intel_context *intel, + struct intel_mipmap_tree *mt, + uint32_t tiling ) +{ + GLuint align_h = 2, align_w = 4; + GLuint level; + GLuint x = 0; + GLuint y = 0; + GLuint width = mt->width0; + GLuint height = mt->height0; + + mt->pitch = mt->width0; + intel_get_texture_alignment_unit(mt->internal_format, &align_w, &align_h); + + if (mt->compressed) { + mt->pitch = ALIGN(mt->width0, align_w); + } + + /* May need to adjust pitch to accomodate the placement of + * the 2nd mipmap. This occurs when the alignment + * constraints of mipmap placement push the right edge of the + * 2nd mipmap out past the width of its parent. + */ + if (mt->first_level != mt->last_level) { + GLuint mip1_width; + + if (mt->compressed) { + mip1_width = ALIGN(minify(mt->width0), align_w) + + ALIGN(minify(minify(mt->width0)), align_w); + } else { + mip1_width = ALIGN(minify(mt->width0), align_w) + + minify(minify(mt->width0)); + } + + if (mip1_width > mt->pitch) { + mt->pitch = mip1_width; + } + } + + /* Pitch must be a whole number of dwords, even though we + * express it in texels. + */ + mt->pitch = intel_miptree_pitch_align (intel, mt, tiling, mt->pitch); + 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, + height, 1); + + if (mt->compressed) + img_height = MAX2(1, height/4); + else + img_height = ALIGN(height, align_h); + + + /* 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 += ALIGN(width, align_w); + } + else { + y += img_height; + } + + width = minify(width); + height = minify(height); + } +} |