106 lines
4 KiB
C
106 lines
4 KiB
C
/*
|
|
* This file is part of wl-overlay: show overlays with images and text in Wayland
|
|
* Copyright © 2022 Midgard
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdbool.h>
|
|
#include <math.h>
|
|
#include <cairo/cairo.h>
|
|
#include <pango/pangocairo.h>
|
|
#include "common.h"
|
|
#include "state.h"
|
|
|
|
|
|
#define float_is_zero(number) (number < 1e-8)
|
|
|
|
|
|
static void
|
|
set_source_argb_cairo(cairo_t *cairo, struct color_argb *color) {
|
|
cairo_set_source_rgba(cairo, color->r, color->g, color->b, color->a);
|
|
}
|
|
|
|
static void
|
|
draw_rounded_rectangle(cairo_t *cr, int x, int y, int width, int height, int radius)
|
|
{
|
|
cairo_new_sub_path(cr);
|
|
cairo_arc(cr, x + radius, y + radius, radius, M_PI, 3*M_PI/2);
|
|
cairo_arc(cr, x + width - radius, y + radius, radius, 3*M_PI/2, 0);
|
|
cairo_arc(cr, x + width - radius, y + height - radius, radius, 0, M_PI/2);
|
|
cairo_arc(cr, x + radius, y + height - radius, radius, M_PI/2, M_PI);
|
|
cairo_close_path(cr);
|
|
}
|
|
|
|
void
|
|
draw_frame_into(uint32_t *data, struct user_request *user_request, const int width, const int height)
|
|
{
|
|
cairo_surface_t *cairo_target_surface = cairo_image_surface_create_for_data(
|
|
(unsigned char *)data, CAIRO_FORMAT_ARGB32, width, height, width * 4);
|
|
cairo_t *cairo = cairo_create(cairo_target_surface);
|
|
|
|
/* Draw background */
|
|
if (!float_is_zero(user_request->backdrop.a)) {
|
|
set_source_argb_cairo(cairo, &user_request->backdrop);
|
|
draw_rounded_rectangle(cairo, 0, 0, width, height, user_request->border_radius);
|
|
cairo_fill(cairo);
|
|
}
|
|
|
|
/* Load and draw PNG */
|
|
if (strcmp("", user_request->graphics_filename) != STR_EQUAL) {
|
|
cairo_save(cairo);
|
|
cairo_surface_t *cairo_png_surface = cairo_image_surface_create_from_png(user_request->graphics_filename);
|
|
if (cairo_surface_status(cairo_png_surface) != CAIRO_STATUS_SUCCESS) {
|
|
fprintf(stderr, "Failed to open PNG image.\n");
|
|
exit(1);
|
|
}
|
|
|
|
/* Set transformations to fit image in box */
|
|
int img_width = cairo_image_surface_get_width(cairo_png_surface);
|
|
int img_height = cairo_image_surface_get_height(cairo_png_surface);
|
|
double width_scale = ((double)width - 2*user_request->padding) / img_width;
|
|
double height_scale = (((double)height - 2*user_request->padding) * 3 / 4.0) / img_height;
|
|
double scale = MIN(width_scale, height_scale);
|
|
if (scale > 1.0) scale = 1.0;
|
|
cairo_translate(cairo,
|
|
(width - img_width *scale)/2.0,
|
|
(3*height/4.0 - img_height*scale)/2.0);
|
|
cairo_scale(cairo, scale, scale);
|
|
|
|
cairo_set_source_surface(cairo, cairo_png_surface, 0.0, 0.0);
|
|
cairo_paint(cairo);
|
|
cairo_surface_destroy(cairo_png_surface);
|
|
cairo_restore(cairo);
|
|
}
|
|
|
|
/* Draw text */
|
|
if (user_request->text) {
|
|
PangoLayout *layout = pango_cairo_create_layout(cairo);
|
|
pango_layout_set_text(layout, user_request->text, -1);
|
|
pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
|
|
pango_layout_set_width(layout, (width - 2*user_request->padding) * PANGO_SCALE);
|
|
PangoFontDescription *desc = pango_font_description_from_string(user_request->font);
|
|
pango_layout_set_font_description(layout, desc);
|
|
pango_font_description_free(desc);
|
|
set_source_argb_cairo(cairo, &user_request->text_color);
|
|
int text_width = 0, text_height = 0;
|
|
pango_layout_get_size(layout, &text_width, &text_height);
|
|
cairo_move_to(cairo, user_request->padding, 3*height/4.0);
|
|
pango_cairo_show_layout(cairo, layout);
|
|
g_object_unref(layout);
|
|
}
|
|
|
|
cairo_surface_destroy(cairo_target_surface);
|
|
cairo_destroy(cairo);
|
|
}
|