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2007-06-28 Matthew Allum <mallum@openedhand.com>

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* clutter/cogl/gl/cogl.c: (cogl_setup_viewport):
        Improve fixed z_camera value for defualt perspective.
        Appears pixel perfect on ATI and Intel at least
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Matthew Allum 2007-06-28 09:38:42 +00:00
parent 3765475f32
commit ca450782cb
2 changed files with 12 additions and 4 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2007-06-28 Matthew Allum <mallum@openedhand.com>
* clutter/cogl/gl/cogl.c: (cogl_setup_viewport):
Improve fixed z_camera value for defualt perspective.
Appears pixel perfect on ATI and Intel at least
2007-06-28 Tomas Frydrych <tf@openedhand.com> 2007-06-28 Tomas Frydrych <tf@openedhand.com>
* tests/test-perspective.c: * tests/test-perspective.c:

10
clutter/cogl/gl/cogl.c
View File

@ -515,12 +515,14 @@ cogl_setup_viewport (guint width,
* actor being offscreen. Perhaps more significantly, it also causes * actor being offscreen. Perhaps more significantly, it also causes
* hinting artifacts when rendering text. * hinting artifacts when rendering text.
* *
* So for the default 60 deg angle we worked out that the value of 0.8699 * So for the default 60 deg angle we worked out that the value of 0.869
* is giving correct stretch and no noticeable artifacts on text. * is giving correct stretch and no noticeable artifacts on text. Seems
* good on all drivers too.
*/ */
#define DEFAULT_Z_CAMERA 0.8699f #define DEFAULT_Z_CAMERA 0.869f
z_camera = DEFAULT_Z_CAMERA; z_camera = DEFAULT_Z_CAMERA;
if (fovy != CFX_60) if (fovy != CFX_60)
{ {
ClutterFixed fovy_rad = CFX_MUL (fovy, CFX_PI) / 180; ClutterFixed fovy_rad = CFX_MUL (fovy, CFX_PI) / 180;
@ -529,7 +531,7 @@ cogl_setup_viewport (guint width,
CLUTTER_FIXED_TO_FLOAT (CFX_DIV (clutter_sinx (fovy_rad), CLUTTER_FIXED_TO_FLOAT (CFX_DIV (clutter_sinx (fovy_rad),
clutter_cosx (fovy_rad)) >> 1); clutter_cosx (fovy_rad)) >> 1);
} }
GE( glTranslatef (-0.5f, -0.5f, -z_camera) ); GE( glTranslatef (-0.5f, -0.5f, -z_camera) );
GE( glScalef ( 1.0f / width, GE( glScalef ( 1.0f / width,
-1.0f / height, -1.0f / height,