This fixes a huge performance bug (entire image was being pushed to X
server in order to copy a tiny piece of it). I see up to 50x improvement
from subimage_copy (which was designed to expose this problem) but also
a 5x improvement in some text performance cases.
xlib-rgba subimage_copy-512 3.93 2.46% -> 0.07 2.71%: 52.91x faster
███████████████████████████████████████████████████▉
xlib-rgb subimage_copy-512 4.03 1.97% -> 0.09 2.61%: 44.74x faster
███████████████████████████████████████████▊
xlib-rgba subimage_copy-256 1.02 2.25% -> 0.07 0.56%: 14.42x faster
█████████████▍
xlib-rgba text_image_rgb_over-256 63.21 1.53% -> 11.87 2.17%: 5.33x faster
████▍
xlib-rgba text_image_rgba_over-256 62.31 0.72% -> 11.87 2.82%: 5.25x faster
████▎
xlib-rgba text_image_rgba_source-256 67.97 0.85% -> 16.48 2.23%: 4.13x faster
███▏
xlib-rgba text_image_rgb_source-256 68.82 0.55% -> 16.93 2.10%: 4.07x faster
███▏
xlib-rgba subimage_copy-128 0.19 1.72% -> 0.06 0.85%: 3.10x faster
██▏
The trick for this was to carefully ensure that the pen always has
at least 4 vertices. There was a previous attempt at this in the
code already but the test case had a combination of matrix and radius
that resulted in a value that was just able to sneak past the previous
check.
Type1 subsetting adds the .notdef glyph to the subset because the Type 1
spec requires that it be defined. However if the subset already has
256 glyphs, this will cause the Encoding vector to have 257 entries
which ghostscript does not like.
New names are in line with cairo naming standards.
XIDs are now typedefs not structs.
xcb_generate_id replaces *_new functions.
Also fixed all warnings (one const, new enums in switch statements).
In particular, many possible error values on a surface provided
to cairo_pattern_create_for_surface were previously being swallowed
and a nil pattern was returned that erroneously reported
CAIRO_STATUS_NO_MEMORY.
This adds a new nil cairo_image_surface to hold CAIRO_STATUS_INVALID_FORMAT.
Previously the detected error was being lost and a nil surface was
returned that erroneously reported CAIRO_STATUS_NO_MEMORY.
The following documented symbols were missing this tag:
cairo_clip_extents
cairo_copy_clip_rectangles
CAIRO_STATUS_INVALID_INDEX
cairo_rectangle_t
cairo_rectangle_list_t
One of these functions was already documented to be doing this, and
the other one should have been. Now the documentation and behavior
for both are consistent, (and the path-data test case verifies this).
Adds API functions for inspecting the current dash state, as well as
the contents of pattern objects:
cairo_get_dash
cairo_get_dash_count
cairo_pattern_get_rgba
cairo_pattern_get_surface
cairo_pattern_get_color_stop_rgba
cairo_pattern_get_color_stop_count
cairo_pattern_get_linear_points
cairo_pattern_get_radial_circles
