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/*
* Copyright (C) 2021 P. J. McDermott
*
* This file is part of Maze Fight
*
* Maze Fight 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.
*
* Maze Fight 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 Maze Fight. If not, see <http://www.gnu.org/licenses/>.
*/
#include <SDL.h>
#include <SDL_ttf.h>
#include "../tk.h"
#include "widget.h"
struct mftk_label {
struct mftk_widget parent;
SDL_Texture *texture;
int y;
int h;
};
static void
_mftk_label_layout(struct mftk_widget *w __attribute__((__unused__)))
{
/* Size set in constructor */
}
static int
_mftk_label_event(struct mftk_widget *w __attribute__((__unused__)),
SDL_Event *e __attribute__((__unused__)),
int x __attribute__((__unused__)),
int y __attribute__((__unused__)))
{
/* No events */
return 0;
}
static int
_mftk_label_render(struct mftk_widget *w, SDL_Renderer *renderer, int x, int y)
{
struct mftk_label *l = (struct mftk_label *) w;
SDL_Rect rect;
rect.x = x;
rect.y = l->y + y;
rect.w = w->w;
rect.h = l->h;
if (SDL_RenderCopy(renderer, l->texture, NULL, &rect) < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Couldn't render widget: %s",
SDL_GetError());
return -1;
}
return 0;
}
static void
_mftk_label_destroy(struct mftk_widget *w)
{
struct mftk_label *l = (struct mftk_label *) w;
SDL_DestroyTexture(l->texture);
}
struct mftk_widget *
mftk_label_new(TTF_Font *font, const char *text, SDL_Color *color,
SDL_Renderer *renderer)
{
struct mftk_widget *w;
struct mftk_label *l;
SDL_Surface *surface;
int line_skip;
int ascent;
int max_y;
const char *c;
int glyph_max_y;
mftk_widget_init(w, l, label);
surface = TTF_RenderUTF8_Blended(font, text, *color);
if (surface == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Couldn't create surface: %s",
TTF_GetError());
free(l);
return NULL;
}
l->texture = SDL_CreateTextureFromSurface(renderer, surface);
if (l->texture == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Couldn't create texture: %s",
SDL_GetError());
SDL_FreeSurface(surface);
free(l);
return NULL;
}
line_skip = TTF_FontLineSkip(font);
ascent = TTF_FontAscent (font);
max_y = 0;
for (c = text; *c != '\0'; ++c) {
if (TTF_GlyphMetrics(font, *c, NULL, NULL, NULL, &glyph_max_y,
NULL) < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Couldn't get glyph metrics: %s",
TTF_GetError());
continue;
}
if (glyph_max_y > max_y) {
max_y = glyph_max_y;
}
}
w->w = surface->w;
w->h = line_skip;
l->y = (line_skip - ascent) / 2 + (ascent - max_y);
l->h = surface->h;
SDL_FreeSurface(surface);
return w;
}
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