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label: add support for HiDPI

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Set the device scale on the cairo surface based on the pixel
buffer device scale. cairo will do the rest of the magic for
us.

https://bugs.freedesktop.org/show_bug.cgi?id=84482
This commit is contained in:
Giovanni Campagna 2015-03-21 21:54:32 -07:00 • committed by Ray Strode
parent dd005c3fd5
commit 72ae2bd889
1 changed files with 6 additions and 3 deletions
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9
src/plugins/controls/label/plugin.c
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@ -113,15 +113,18 @@ get_cairo_context_for_pixel_buffer (ply_label_plugin_control_t *label,
cairo_t *cairo_context;
unsigned char *data;
ply_rectangle_t size;
uint32_t scale;
data = (unsigned char *) ply_pixel_buffer_get_argb32_data (pixel_buffer);
ply_pixel_buffer_get_size (pixel_buffer, &size);
scale = ply_pixel_buffer_get_device_scale (pixel_buffer);
cairo_surface = cairo_image_surface_create_for_data (data,
CAIRO_FORMAT_ARGB32,
size.width,
size.height,
size.width * 4);
size.width * scale,
size.height * scale,
size.width * scale * 4);
cairo_surface_set_device_scale (cairo_surface, scale, scale);
cairo_context = cairo_create (cairo_surface);
cairo_surface_destroy (cairo_surface);