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#include <glib.h>
#include <math.h>
#include <pango/pangocairo.h>
#include <pango/pango-font.h>
#include <pango/pango-types.h>
#include "draw.h"
#include "button.h"
#include "log.h"
// Idea: Either make a to_draw queue where we put things we schedule to redraw
// (this will also work for animations in the future)
// or use some flags to trigger drawing
static void layout_destroy(Layout *layout)
{
g_object_unref(layout->pl);
g_free(layout);
}
Drawable *draw_create(const char *font, int height, int left_pad, int right_pad, int top_pad, double alpha)
{
Drawable *draw = g_malloc(sizeof(Drawable));
g_assert_nonnull(draw);
log_debug("Pango loading font description '%s'", font);
draw->desc = pango_font_description_from_string(font);
log_debug("Pango found matching font '%s'", pango_font_description_get_family(draw->desc));
draw->height = height;
draw->left_pad = left_pad;
draw->right_pad = right_pad;
draw->top_pad = top_pad;
draw->alpha = alpha;
g_assert(alpha >= 0 && alpha <= 1);
draw->layouts = NULL;
log_debug("Draw context created [height=%d, left_pad=%d, right_pad=%d, top_pad=%d, alpha=%.2lf]", height, left_pad, right_pad, top_pad, alpha);
return draw;
}
void draw_paint(Drawable *draw, Window *win)
{
// FIXME: Does not work for scale != 1
//double scale = window_get_scale(win);
double scale = 1;
int screen_width, screen_height;
window_get_screen_size(win, &screen_width, &screen_height);
int width0 = screen_width - draw->right_pad - draw->left_pad;
int width = round(width0 * scale);
int height = round(draw->height * scale);
cairo_surface_t *surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
cairo_t *cr = cairo_create(surface);
cairo_set_fill_rule(cr, CAIRO_FILL_RULE_EVEN_ODD);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
int radius = height / 2;
double degree = M_PI / 180.0;
cairo_set_source_rgba(cr, 0.3, 0.3, 0.3, draw->alpha);
// TODO: Here we should paint the shape of the bar, however there is a problem with the surface
// painted in the pixmap to mask the window shape in window_paint_corners.
//
// This is caused by some difference between the two shapes (that should technically be the same)
// which causes a mismatch between the two layers and leaves some black pixels visible
//cairo_arc(cr, radius, radius, radius, 90.0 * degree, 270 * degree);
//cairo_arc(cr, width - radius, radius, radius, 270 * degree, 450 * degree);
//cairo_fill(cr);
cairo_paint(cr);
int line_w = 1 * scale;
cairo_set_line_width(cr, line_w);
for (GList *it = draw->layouts; it; it = it->next) {
Layout *layout = it->data;
int text_x = layout->x + (layout->width / 2) - (layout->text_w / 2);
int text_y = layout->y + (layout->height / 2) - (layout->text_h / 2);
// purple
cairo_set_source_rgba(cr, 0.502, 0.168, 0.886, 1);
cairo_new_sub_path(cr);
cairo_arc(cr, layout->x + radius, layout->y + radius, radius, 90 * degree, 270 * degree);
cairo_arc(cr, layout->x + layout->width - radius, layout->y + radius, radius, 270 * degree, 450 * degree);
cairo_close_path(cr);
cairo_fill(cr);
cairo_set_source_rgba(cr, 0.8, 0.8, 0.8, 1);
cairo_new_sub_path(cr);
cairo_arc(cr, layout->x + radius, layout->y + radius, radius - line_w , 90 * degree, 270 * degree);
cairo_arc(cr, layout->x + layout->width - radius, layout->y + radius, radius - line_w, 270 * degree, 450 * degree);
cairo_close_path(cr);
cairo_stroke(cr);
cairo_set_source_rgb(cr, 0.8, 0.8, 0.8);
cairo_move_to(cr, text_x, text_y);
pango_cairo_update_layout(cr, layout->pl);
pango_cairo_show_layout(cr, layout->pl);
}
cairo_destroy(cr);
// TODO: Move these somewhere else
window_move(win, draw->left_pad, draw->top_pad);
window_resize(win, width0, draw->height);
window_paint_surface(win, surface, width, height);
cairo_surface_destroy(surface);
}
void draw_compute_layout(Drawable *draw, GList *btns, cairo_t *cr)
{
g_list_free_full(draw->layouts, (GDestroyNotify)layout_destroy);
draw->layouts = NULL;
// FIXME: Does not work for scale != 1
//double scale = window_get_scale(win);
double scale = 1;
int x = 0;
int height = round(draw->height * scale);
int radius = height / 2;
for (GList *it = btns; it; it = it->next) {
Button *btn = it->data;
Layout *layout = g_malloc(sizeof(Layout));
layout->btn = btn;
layout->x = x;
layout->y = 0;
layout->pl = pango_cairo_create_layout(cr);
pango_layout_set_font_description(layout->pl, draw->desc);
pango_layout_set_text(layout->pl, btn->text, -1);
pango_layout_set_alignment(layout->pl, PANGO_ALIGN_CENTER);
int text_w, text_h;
pango_layout_get_pixel_size(layout->pl, &text_w, &text_h);
layout->text_w = ceil(text_w / scale);
layout->text_h = ceil(text_h / scale);
layout->width = btn->fixed_size ? height : layout->text_w + 2 * radius;
layout->height = height;
draw->layouts = g_list_append(draw->layouts, layout);
int sep = 10 * scale;
int line_w = 1 * scale;
x += height + line_w * 2 + sep;
}
log_debug("Updated layouts");
}
void draw_destroy(Drawable *draw)
{
g_list_free_full(draw->layouts, (GDestroyNotify)layout_destroy);
pango_font_description_free(draw->desc);
g_free(draw);
}
// vim: ts=4 sw=4 et
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