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glamor: Clarify how the repeat values being passed around work.

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Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Eric Anholt 2016-01-27 11:15:27 -08:00
parent 990a8ee013
commit 2c3273861c
1 changed files with 6 additions and 6 deletions
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12
glamor/glamor_render.c
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@ -76,11 +76,11 @@ glamor_create_composite_fs(struct shader_key *key)
"{\n"
" vec2 rel_tex; \n"
" rel_tex = texture * wh.xy; \n"
" if (repeat == RepeatNone)\n"
" if (repeat == RepeatFix + RepeatNone)\n"
" return rel_tex; \n"
" else if (repeat == RepeatNormal) \n"
" else if (repeat == RepeatFix + RepeatNormal) \n"
" rel_tex = floor(rel_tex) + (fract(rel_tex) / wh.xy); \n"
" else if (repeat == RepeatPad) { \n"
" else if (repeat == RepeatFix + RepeatPad) { \n"
" if (rel_tex.x >= 1.0) \n"
" rel_tex.x = 1.0 - wh.z * wh.x / 2.; \n"
" else if (rel_tex.x < 0.0) \n"
@ -90,7 +90,7 @@ glamor_create_composite_fs(struct shader_key *key)
" else if (rel_tex.y < 0.0) \n"
" rel_tex.y = 0.0; \n"
" rel_tex = rel_tex / wh.xy; \n"
" } else if (repeat == RepeatReflect) {\n"
" } else if (repeat == RepeatFix + RepeatReflect) {\n"
" if ((1.0 - mod(abs(floor(rel_tex.x)), 2.0)) < 0.001)\n"
" rel_tex.x = 2.0 - (1.0 - fract(rel_tex.x)) / wh.x;\n"
" else \n"
@ -107,8 +107,8 @@ glamor_create_composite_fs(struct shader_key *key)
const char *rel_sampler =
" vec4 rel_sampler(sampler2D tex_image, vec2 tex, vec4 wh, int repeat, int set_alpha)\n"
"{\n"
" tex = rel_tex_coord(tex, wh, repeat - RepeatFix);\n"
" if (repeat == RepeatFix) {\n"
" tex = rel_tex_coord(tex, wh, repeat);\n"
" if (repeat == RepeatFix + RepeatNone) {\n"
" if (!(tex.x >= 0.0 && tex.x < 1.0 \n"
" && tex.y >= 0.0 && tex.y < 1.0))\n"
" return vec4(0.0, 0.0, 0.0, set_alpha);\n"