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gradient.c
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gradient.c
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/* gradient.c
*/
#include <cairo.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "framework.h"
static void gradient_load(struct module_configuration *mc __attribute__((unused))) {
/* NOTHING TO DO */
}
static void gradient_paint(struct module_configuration *mc, cairo_surface_t *cs) {
cairo_t *c;
cairo_pattern_t *cp, *cn;
if(!cs) {
if(mc->verbose) {
fprintf(stderr, "%s():ignoring paint because surface is NULL.\n", __func__);
}
return;
}
c=cairo_create(cs);
cp=cairo_pattern_create_linear(0., 0., 0., mc->board_height);
cairo_pattern_set_filter(cp, CAIRO_FILTER_GAUSSIAN);
cairo_pattern_add_color_stop_rgb(cp, 0, 0., 0., 0.);
cairo_pattern_add_color_stop_rgb(cp, 1, 1., 1., 1.);
cn=cairo_pattern_create_linear(0., 0., 0., mc->board_height);
cairo_pattern_set_filter(cn, CAIRO_FILTER_NEAREST);
cairo_pattern_add_color_stop_rgb(cn, 0, 0., 0., 0.);
cairo_pattern_add_color_stop_rgb(cn, 1, 1., 1., 1.);
cairo_rectangle(c, 0., 0., mc->board_width/2., mc->board_height);
cairo_set_source(c, cp);
cairo_fill(c);
cairo_rectangle(c, mc->board_width/2., 0., mc->board_width/2., mc->board_height);
cairo_set_source(c, cn);
cairo_fill(c);
cairo_show_page(c);
cairo_destroy(c);
cairo_pattern_destroy(cp);
}
static void gradient_post_press(struct module_configuration *mc, cairo_surface_t *cs, double x __attribute__((unused)), double y __attribute__((unused))) {
/* just repaint on clicks */
gradient_paint(mc, cs);
}
static void gradient_post_action(struct module_configuration *mc __attribute__((unused)), cairo_surface_t *cs __attribute__((unused)), enum framework_action action __attribute__((unused))) {
/* NOTHING TO DO */
}
static void init(void) __attribute__((constructor));
static void init(void) {
module_register("gradient", "Gradient", gradient_load, gradient_post_press, gradient_post_action, gradient_paint, NULL);
}