FGFS-4.1/simgear
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ShivaVG: Support for pseudo non-zero fillrule

Browse Source
This commit is contained in:
Thomas Geymayer 2012-09-21 22:03:44 +02:00
parent 1b55076897
commit a25bd06138
1 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
simgear/canvas/ShivaVG/src/shPipeline.c
View File

@ -332,8 +332,20 @@ VG_API_CALL void vgDrawPath(VGPath path, VGbitfield paintModes)
/* Tesselate into stencil */
glEnable(GL_STENCIL_TEST);
glStencilFunc(GL_ALWAYS, 0, 0);
glStencilOp(GL_INVERT, GL_INVERT, GL_INVERT);
if( context->fillRule == VG_EVEN_ODD )
{
glStencilFunc(GL_ALWAYS, 0, 0);
glStencilOp(GL_INVERT, GL_INVERT, GL_INVERT);
}
else
{
// pseudo non-zero fill rule. Fill everything at least covered once, don't
// care for possible decrements.
// TODO implement real non-zero fill-rule
glStencilFunc(GL_ALWAYS, 1, 1);
glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
}
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
shDrawVertices(p, GL_TRIANGLE_FAN);