mirror of
git://projects.qi-hardware.com/gmenu2x.git
synced 2025-03-14 22:09:11 +02:00
4474a42767
This commit ensures that a fully constructed Font object will not crash gmenu2x when it is used, even if loading the font or initialising SDL_ttf altogether has failed. Instead, it will render no text, but icons and images are still drawn. The proper way to signal an error would be to throw an exception and fail to construct the Font object. However, gmenu2x does not use exceptions.
143 lines
2.6 KiB
C++
143 lines
2.6 KiB
C++
#include "font.h"
|
|
|
|
#include "debug.h"
|
|
#include "surface.h"
|
|
#include "utilities.h"
|
|
|
|
#include <SDL.h>
|
|
#include <SDL_ttf.h>
|
|
#include <vector>
|
|
|
|
/* TODO: Let the theme choose the font and font size */
|
|
#define TTF_FONT "/usr/share/fonts/truetype/dejavu/DejaVuSansCondensed.ttf"
|
|
#define TTF_FONT_SIZE 12
|
|
|
|
using namespace std;
|
|
|
|
Font *Font::defaultFont()
|
|
{
|
|
return new Font(TTF_FONT, TTF_FONT_SIZE);
|
|
}
|
|
|
|
Font::Font(const std::string &path, unsigned int size)
|
|
{
|
|
font = nullptr;
|
|
fontheight = 1;
|
|
|
|
/* Note: TTF_Init and TTF_Quit perform reference counting, so call them
|
|
* both unconditionally for each font. */
|
|
if (TTF_Init() < 0) {
|
|
ERROR("Unable to init SDL_ttf library\n");
|
|
return;
|
|
}
|
|
|
|
font = TTF_OpenFont(path.c_str(), size);
|
|
if (!font) {
|
|
ERROR("Unable to open font\n");
|
|
TTF_Quit();
|
|
return;
|
|
}
|
|
|
|
fontheight = TTF_FontHeight(font);
|
|
}
|
|
|
|
Font::~Font()
|
|
{
|
|
if (font) {
|
|
TTF_CloseFont(font);
|
|
TTF_Quit();
|
|
}
|
|
}
|
|
|
|
int Font::getTextWidth(const char *text)
|
|
{
|
|
if (font) {
|
|
int w, h;
|
|
TTF_SizeUTF8(font, text, &w, &h);
|
|
return w;
|
|
}
|
|
else return 1;
|
|
}
|
|
|
|
void Font::write(Surface *surface, const string &text,
|
|
int x, int y, HAlign halign, VAlign valign)
|
|
{
|
|
if (!font) {
|
|
return;
|
|
}
|
|
|
|
if (text.find("\n", 0) == string::npos) {
|
|
writeLine(surface, text.c_str(), x, y, halign, valign);
|
|
return;
|
|
}
|
|
|
|
vector<string> v;
|
|
split(v, text, "\n");
|
|
|
|
for (vector<string>::const_iterator it = v.begin(); it != v.end(); it++) {
|
|
writeLine(surface, it->c_str(), x, y, halign, valign);
|
|
y += fontheight;
|
|
}
|
|
}
|
|
|
|
void Font::writeLine(Surface *surface, const char *text,
|
|
int x, int y, HAlign halign, VAlign valign)
|
|
{
|
|
if (!font) {
|
|
return;
|
|
}
|
|
|
|
switch (halign) {
|
|
case HAlignLeft:
|
|
break;
|
|
case HAlignCenter:
|
|
x -= getTextWidth(text) / 2;
|
|
break;
|
|
case HAlignRight:
|
|
x -= getTextWidth(text);
|
|
break;
|
|
}
|
|
|
|
switch (valign) {
|
|
case VAlignTop:
|
|
break;
|
|
case VAlignMiddle:
|
|
y -= fontheight / 2;
|
|
break;
|
|
case VAlignBottom:
|
|
y -= fontheight;
|
|
break;
|
|
}
|
|
|
|
SDL_Color color = { 0, 0, 0, 0 };
|
|
SDL_Surface *s = TTF_RenderUTF8_Blended(font, text, color);
|
|
|
|
SDL_Rect rect = { (Sint16) x, (Sint16) (y - 1), 0, 0 };
|
|
SDL_BlitSurface(s, NULL, surface->raw, &rect);
|
|
|
|
/* Note: rect.x / rect.y are reset everytime because SDL_BlitSurface
|
|
* will modify them if negative */
|
|
rect.x = x;
|
|
rect.y = y + 1;
|
|
SDL_BlitSurface(s, NULL, surface->raw, &rect);
|
|
|
|
rect.x = x - 1;
|
|
rect.y = y;
|
|
SDL_BlitSurface(s, NULL, surface->raw, &rect);
|
|
|
|
rect.x = x + 1;
|
|
rect.y = y;
|
|
SDL_BlitSurface(s, NULL, surface->raw, &rect);
|
|
SDL_FreeSurface(s);
|
|
|
|
rect.x = x;
|
|
rect.y = y;
|
|
color.r = 0xff;
|
|
color.g = 0xff;
|
|
color.b = 0xff;
|
|
|
|
s = TTF_RenderUTF8_Blended(font, text, color);
|
|
SDL_BlitSurface(s, NULL, surface->raw, &rect);
|
|
SDL_FreeSurface(s);
|
|
}
|