[cairo] Using Cairo GL surface as the main surface and supply cairo_image_surface as pattern won't work
pepsin at me.com
Fri Aug 14 08:20:26 PDT 2015
I am tweaking an Cairo app on Android, and using the https://github.com/SRA-SiliconValley/cairogles as the GL based cairo.
For now I use cairo_gl_surface_create_for_egl to create an gl surface, call it Prime Surface, and my app create multiple layer of cairo_image_surface which created by cairo_image_surface_create_for_data and using them as pattern to draw onto the Prime Surface.
The drawing code are something like:
cairo_pattern_t *pattern = cairo_pattern_create_for_surface(r->surface);
int surfaceWidth = cairo_image_surface_get_width(r->surface);
int surfaceHeight = cairo_image_surface_get_height(r->surface);
cairo_rectangle(cr, 0, 0, surfaceWidth, surfaceHeight);
but this do not work. I also tried:
cairo_set_source_surface(cr, image_surface, 0, 0);
don’t work too.
Do anybody know what causing this problem?
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