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opengl: fix drawing artifact around rectangles.

db4
John Benediktsson 2015-07-18 15:08:48 -07:00
parent f9cb9765ee
commit 58d84c6c98
1 changed files with 12 additions and 10 deletions
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22
basis/opengl/opengl.factor
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@ -22,7 +22,7 @@ SYMBOL: gl-scale-factor
: error>string ( n -- string )
H{
{ 0x0 "No error" }
{ 0x0000 "No error" }
{ 0x0501 "Invalid value" }
{ 0x0500 "Invalid enumerant" }
{ 0x0502 "Invalid operation" }
@ -86,9 +86,11 @@ MACRO: all-enabled-client-state ( seq quot -- )
: gl-texture-coord-pointer ( seq -- )
[ 2 GL_FLOAT 0 ] dip glTexCoordPointer ; inline
: (line-vertices) ( a b -- vertices )
[ first2 [ 0.3 + ] bi@ ] bi@ 4 float-array{ } nsequence ;
: line-vertices ( a b -- )
[ first2 [ 0.5 + ] bi@ ] bi@ 4 float-array{ } nsequence
gl-vertex-pointer ;
(line-vertices) gl-vertex-pointer ;
: gl-line ( a b -- )
line-vertices GL_LINES 0 2 glDrawArrays ;
@ -97,14 +99,14 @@ MACRO: all-enabled-client-state ( seq quot -- )
#! We use GL_LINE_STRIP with a duplicated first vertex
#! instead of GL_LINE_LOOP to work around a bug in Apple's
#! X3100 driver.
loc first2 :> ( x y )
dim first2 :> ( w h )
loc first2 [ 0.3 - ] bi@ :> ( x y )
dim first2 [ 0.6 + ] bi@ :> ( w h )
[
x 0.5 + y 0.5 +
x w + 0.3 - y 0.5 +
x w + 0.3 - y h + 0.3 -
x y h + 0.3 -
x 0.5 + y 0.5 +
x y
x w + y
x w + y h +
x y h +
x y
] float-array{ } output>sequence ;
: rect-vertices ( loc dim -- )