1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
* 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 <stdlib.h>
#include "widget.h"
SDL_Texture *
mf_widget_text(TTF_Font *font, const char *text, SDL_Color *color,
SDL_Renderer *renderer, SDL_Rect *rect)
{
SDL_Surface *surface;
SDL_Texture *texture;
int line_skip;
int ascent;
int max_y;
const char *c;
int glyph_max_y;
surface = TTF_RenderUTF8_Blended(font, text, *color);
if (surface == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Couldn't create surface: %s",
TTF_GetError());
return NULL;
}
texture = SDL_CreateTextureFromSurface(renderer, surface);
if (texture == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Couldn't create texture: %s",
SDL_GetError());
SDL_FreeSurface(surface);
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",
SDL_GetError());
continue;
}
if (glyph_max_y > max_y) {
max_y = glyph_max_y;
}
}
rect->x = 0;
rect->y = (line_skip - ascent) / 2 + (ascent - max_y);
rect->w = surface->w;
rect->h = surface->h;
SDL_FreeSurface(surface);
return texture;
}
SDL_Texture *
mf_widget_button(TTF_Font *font, const char *text, SDL_Color *text_color,
SDL_Color *fill_color, int padding, SDL_Renderer *renderer,
SDL_Rect *rect)
{
SDL_Texture *text_texture;
SDL_Rect text_rect;
SDL_Texture *texture;
SDL_Texture *target;
text_texture = mf_widget_text(font, text, text_color, renderer,
&text_rect);
if (text_texture == NULL) {
return NULL;
}
text_rect.x += padding;
text_rect.y += padding;
rect->x = 0;
rect->y = 0;
rect->w = text_rect.w + padding * 2;
rect->h = TTF_FontLineSkip(font) + padding * 2;
texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888,
SDL_TEXTUREACCESS_TARGET, rect->w, rect->h);
if (texture == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Couldn't create texture: %s",
SDL_GetError());
SDL_DestroyTexture(text_texture);
return NULL;
}
target = SDL_GetRenderTarget(renderer);
SDL_SetRenderTarget(renderer, texture);
SDL_SetRenderDrawColor(renderer,
fill_color->r, fill_color->g,
fill_color->b, fill_color->a);
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, text_texture, NULL, &text_rect);
SDL_SetRenderTarget(renderer, target);
return texture;
}
|