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i965: Use proper texture alignment units for cubemaps on Gen5+.

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In particular, S3TC compressed textures need align_h == 4.

Fixes skybox errors in Quake 4 and FEAR.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=34628
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
(cherry picked from commit e0e688ca5441e2c8bc59ec7488bc1bc4ba196602)
This commit is contained in:
Kenneth Graunke 2011-08-15 12:04:37 -07:00
parent 0f87fe948a
commit e4b1dce9ec
1 changed files with 4 additions and 1 deletions
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5
src/mesa/drivers/dri/i965/brw_tex_layout.c
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@ -49,11 +49,14 @@ GLboolean brw_miptree_layout(struct intel_context *intel,
switch (mt->target) {
case GL_TEXTURE_CUBE_MAP:
if (intel->gen >= 5) {
GLuint align_h = 2;
GLuint align_w;
GLuint align_h;
GLuint level;
GLuint qpitch = 0;
int h0, h1, q;
intel_get_texture_alignment_unit(mt->format, &align_w, &align_h);
/* On Ironlake, cube maps are finally represented as just a series
* of MIPLAYOUT_BELOW 2D textures (like 2D texture arrays), separated
* by a pitch of qpitch rows, where qpitch is defined by the equation