Adds two new APIs to the composite API:
- _cairo_gl_composite_set_mask_spans()
Tells the composite renderer to use the color values for spans.
- _cairo_gl_composite_set_clip_region()
Tells the composite renderer to use GL_SCISSORS_TEST to clip when
drawing. This function is very unperformant, so if it can be avoided,
it probably shouldn't be used.
This is the first step at adding the following function set:
_cairo_gl_composite_begin()
_cairo_gl_composite_emit_*()
_cairo_gl_composite_end()
which will take care of proiding a unified model for emitting vertexes
using vbos instead of the 5 different methods we currently have.
This allows designing a cleaner interface for cairo_composite_t as there
will not be static functions that get called outside of the "published"
interfaces.
The idea is being able to generate shaders from the given input
on-demand. This allows creating more advanced shaders, such as those
that include the destination (for self-painting and
unsupported-by-blending operator) or painting images in weird formats
(extra translation step in shader, think YUV).
color stops are not premultiplied so we need to handle them carefully
when comparing. The next step will be to make cairo_color_stop_t a
unique type to prevent this mistake again.
Don't scatter calls to error printing around everywhere, instead do it
in the one place where it matters.
Also, convert the functions to macros, so we can use __FILE__ and
__LINE__ when printing a warning
Through a very simple mistake we were triggering fallbacks after
detecting we were not able to perform the composite using GLSL -- we
were just returning the UNSUPPORTED status instead of enabling the
fixed-function path.
The function takes a cairo_device_t argument as it can be called on an
unacquired device.
This is the first patch in a process to try to rid cairo-gl-surface.c of
casts from cairo_device_t to cairo_gl_context_t. As its members should
usually only be accessed when the device is locked, the only way the
cairo_gl_context_t should be acquired is using
_cairo_gl_context_acquire().
I updated the Free Software Foundation address using the following script.
for i in $(git grep Temple | cut -d: -f1 )
do
sed -e 's/59 Temple Place[, -]* Suite 330, Boston, MA *02111-1307[, ]* USA/51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA/' -i "$i"
done
Fixes http://bugs.freedesktop.org/show_bug.cgi?id=21356
The code callss the gl device's acquire/release in
cairo_device_acquire/release(). This way, external APIs can use these
functions to prepare for rendering GL.
Also adds code to unset the glx context if it wasn't set when acquiring
the device. This allows multithreaded apps to work fine with just using
cairo APIs, but might introduce penalties in single-threaded
applications.
A simple extension to the component-alpha OVER [as ca-ADD is just the
second pass in ca-OVER] to support amalgamation of glyph masks. This
speeds up firefox-36 by ~5% on g45.
Before:
firefox-36-20090611 76.185
After:
firefox-36-20090611 72.863
