diff options
| -rw-r--r-- | src/mesa/drivers/dri/intel/intel_tex_layout.c | 34 |
1 files changed, 27 insertions, 7 deletions
diff --git a/src/mesa/drivers/dri/intel/intel_tex_layout.c b/src/mesa/drivers/dri/intel/intel_tex_layout.c index 6b9e1de2ed3..b5031750010 100644 --- a/src/mesa/drivers/dri/intel/intel_tex_layout.c +++ b/src/mesa/drivers/dri/intel/intel_tex_layout.c @@ -35,16 +35,39 @@ #include "macros.h" +static int align(int value, int alignment) +{ + return (value + alignment - 1) & ~(alignment - 1); +} + void i945_miptree_layout_2d( struct intel_mipmap_tree *mt ) { - GLint align_h = 2; + GLint 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 * mt->cpp + 3) & ~3) / mt->cpp; + mt->pitch = mt->width0; + + /* 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 = align(minify(mt->width0), align_w) + + minify(minify(mt->width0)); + + if (mip1_width > mt->width0) + mt->pitch = mip1_width; + } + + /* Pitch must be a whole number of dwords, even though we + * express it in texels. + */ + mt->pitch = align(mt->pitch * mt->cpp, 4) / mt->cpp; mt->total_height = 0; for ( level = mt->first_level ; level <= mt->last_level ; level++ ) { @@ -56,7 +79,7 @@ void i945_miptree_layout_2d( struct intel_mipmap_tree *mt ) if (mt->compressed) img_height = MAX2(1, height/4); else - img_height = MAX2(align_h, height); + img_height = align(height, align_h); /* Because the images are packed better, the final offset @@ -67,13 +90,10 @@ void i945_miptree_layout_2d( struct intel_mipmap_tree *mt ) /* Layout_below: step right after second mipmap. */ if (level == mt->first_level + 1) { - x += mt->pitch / 2; - x = (x + 3) & ~ 3; + x += align(width, align_w); } else { y += img_height; - y += align_h - 1; - y &= ~(align_h - 1); } width = minify(width); |