src/util/gradient.c (raw)
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#include "gradient.h"
#include <glib.h>
#include <stdlib.h>
#include <string.h>
#include "common.h"
gboolean read_double(const char *str, double *value)
{
if (!str[0])
return FALSE;
char *end;
*value = strtod(str, &end);
if (end[0])
return FALSE;
return TRUE;
}
gboolean read_double_with_percent(const char *str, double *value)
{
if (!str[0])
return FALSE;
char *end;
*value = strtod(str, &end);
if (end[0] == '%' && !end[1]) {
*value *= 0.01;
return TRUE;
}
if (end[0])
return FALSE;
return TRUE;
}
GradientType gradient_type_from_string(const char *str)
{
if (g_str_equal(str, "horizontal"))
return GRADIENT_HORIZONTAL;
if (g_str_equal(str, "vertical"))
return GRADIENT_VERTICAL;
if (g_str_equal(str, "radial"))
return GRADIENT_CENTERED;
fprintf(stderr, RED "Invalid gradient type: %s" RESET "\n", str);
return GRADIENT_VERTICAL;
}
void init_gradient(GradientClass *g, GradientType type)
{
memset(g, 0, sizeof(*g));
g->type = type;
if (g->type == GRADIENT_VERTICAL) {
Offset *offset_top = (Offset *)calloc(1, sizeof(Offset));
offset_top->constant = TRUE;
offset_top->constant_value = 0;
g->from.offsets_y = g_list_append(g->from.offsets_y, offset_top);
Offset *offset_bottom = (Offset *)calloc(1, sizeof(Offset));
offset_bottom->constant = FALSE;
offset_bottom->element = ELEMENT_SELF;
offset_bottom->variable = SIZE_HEIGHT;
offset_bottom->multiplier = 1.0;
g->to.offsets_y = g_list_append(g->to.offsets_y, offset_bottom);
} else if (g->type == GRADIENT_HORIZONTAL) {
Offset *offset_left = (Offset *)calloc(1, sizeof(Offset));
offset_left->constant = TRUE;
offset_left->constant_value = 0;
g->from.offsets_x = g_list_append(g->from.offsets_x, offset_left);
Offset *offset_right = (Offset *)calloc(1, sizeof(Offset));
offset_right->constant = FALSE;
offset_right->element = ELEMENT_SELF;
offset_right->variable = SIZE_WIDTH;
offset_right->multiplier = 1.0;
g->to.offsets_x = g_list_append(g->to.offsets_x, offset_right);
} else if (g->type == GRADIENT_CENTERED) {
// from
Offset *offset_center_x = (Offset *)calloc(1, sizeof(Offset));
offset_center_x->constant = FALSE;
offset_center_x->element = ELEMENT_SELF;
offset_center_x->variable = SIZE_CENTERX;
offset_center_x->multiplier = 1.0;
g->from.offsets_x = g_list_append(g->from.offsets_x, offset_center_x);
Offset *offset_center_y = (Offset *)calloc(1, sizeof(Offset));
offset_center_y->constant = FALSE;
offset_center_y->element = ELEMENT_SELF;
offset_center_y->variable = SIZE_CENTERY;
offset_center_y->multiplier = 1.0;
g->from.offsets_y = g_list_append(g->from.offsets_y, offset_center_y);
Offset *offset_center_r = (Offset *)calloc(1, sizeof(Offset));
offset_center_r->constant = TRUE;
offset_center_r->constant_value = 0;
g->from.offsets_r = g_list_append(g->from.offsets_r, offset_center_r);
// to
offset_center_x = (Offset *)calloc(1, sizeof(Offset));
offset_center_x->constant = FALSE;
offset_center_x->element = ELEMENT_SELF;
offset_center_x->variable = SIZE_CENTERX;
offset_center_x->multiplier = 1.0;
g->to.offsets_x = g_list_append(g->to.offsets_x, offset_center_x);
offset_center_y = (Offset *)calloc(1, sizeof(Offset));
offset_center_y->constant = FALSE;
offset_center_y->element = ELEMENT_SELF;
offset_center_y->variable = SIZE_CENTERY;
offset_center_y->multiplier = 1.0;
g->to.offsets_y = g_list_append(g->to.offsets_y, offset_center_y);
offset_center_r = (Offset *)calloc(1, sizeof(Offset));
offset_center_r->constant = FALSE;
offset_center_r->element = ELEMENT_SELF;
offset_center_r->variable = SIZE_RADIUS;
offset_center_r->multiplier = 1.0;
g->to.offsets_r = g_list_append(g->to.offsets_r, offset_center_r);
}
}
void cleanup_gradient(GradientClass *g)
{
g_list_free_full(g->extra_color_stops, free);
g_list_free_full(g->from.offsets_x, free);
g_list_free_full(g->from.offsets_y, free);
g_list_free_full(g->from.offsets_r, free);
g_list_free_full(g->to.offsets_x, free);
g_list_free_full(g->to.offsets_y, free);
g_list_free_full(g->to.offsets_r, free);
bzero(g, sizeof(*g));
}
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