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modules: implement convert_buffer() in the high contrast display filter

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This commit is contained in:
Michael Natterer 2013-11-02 01:37:52 +01:00
parent 0ef745cad2
commit a04c442e69
1 changed files with 35 additions and 0 deletions
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35
modules/display-filter-high-contrast.c
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@ -74,6 +74,9 @@ static void cdisplay_contrast_get_property (GObject *object,
GValue *value,
GParamSpec *pspec);
static void cdisplay_contrast_convert_buffer (GimpColorDisplay *display,
GeglBuffer *buffer,
GeglRectangle *area);
static void cdisplay_contrast_convert_surface (GimpColorDisplay *display,
cairo_surface_t *surface);
static GtkWidget * cdisplay_contrast_configure (GimpColorDisplay *display);
@ -128,6 +131,7 @@ cdisplay_contrast_class_init (CdisplayContrastClass *klass)
display_class->help_id = "gimp-colordisplay-contrast";
display_class->stock_id = GIMP_STOCK_DISPLAY_FILTER_CONTRAST;
display_class->convert_buffer = cdisplay_contrast_convert_buffer;
display_class->convert_surface = cdisplay_contrast_convert_surface;
display_class->configure = cdisplay_contrast_configure;
}
@ -180,6 +184,37 @@ cdisplay_contrast_set_property (GObject *object,
}
}
static void
cdisplay_contrast_convert_buffer (GimpColorDisplay *display,
GeglBuffer *buffer,
GeglRectangle *area)
{
CdisplayContrast *contrast = CDISPLAY_CONTRAST (display);
GeglBufferIterator *iter;
gfloat c;
c = contrast->contrast * 2 * G_PI;
iter = gegl_buffer_iterator_new (buffer, area, 0,
babl_format ("R'G'B'A float"),
GEGL_BUFFER_READWRITE, GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (iter))
{
gfloat *data = iter->data[0];
gint count = iter->length;
while (count--)
{
*data = 0.5 * (1.0 + sin (c * *data)); data++;
*data = 0.5 * (1.0 + sin (c * *data)); data++;
*data = 0.5 * (1.0 + sin (c * *data)); data++;
data++;
}
}
}
static void
cdisplay_contrast_convert_surface (GimpColorDisplay *display,
cairo_surface_t *surface)