mirror of
git://projects.qi-hardware.com/gmenu2x.git
synced 2025-03-14 09:49:12 +02:00
0908aa7bb7
When trying to test the previous commit, I couldn't find any place in the application where strings containing newlines are drawn. So I'm assuming this is an unnecessary feature, until someone comes up with a test case proving otherwise. Yeah, I'm too lazy to review all the code that draws text...
134 lines
2.5 KiB
C++
134 lines
2.5 KiB
C++
#include "font.h"
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#include "debug.h"
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#include "surface.h"
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#include "utilities.h"
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#include <SDL.h>
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#include <SDL_ttf.h>
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#include <vector>
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/* TODO: Let the theme choose the font and font size */
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#define TTF_FONT "/usr/share/fonts/truetype/dejavu/DejaVuSansCondensed.ttf"
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#define TTF_FONT_SIZE 12
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using namespace std;
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Font *Font::defaultFont()
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{
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return new Font(TTF_FONT, TTF_FONT_SIZE);
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}
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Font::Font(const std::string &path, unsigned int size)
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{
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font = nullptr;
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lineSpacing = 1;
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/* Note: TTF_Init and TTF_Quit perform reference counting, so call them
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* both unconditionally for each font. */
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if (TTF_Init() < 0) {
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ERROR("Unable to init SDL_ttf library\n");
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return;
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}
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font = TTF_OpenFont(path.c_str(), size);
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if (!font) {
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ERROR("Unable to open font\n");
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TTF_Quit();
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return;
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}
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lineSpacing = TTF_FontLineSkip(font);
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}
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Font::~Font()
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{
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if (font) {
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TTF_CloseFont(font);
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TTF_Quit();
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}
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}
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int Font::getTextWidth(const char *text)
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{
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if (font) {
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int w, h;
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TTF_SizeUTF8(font, text, &w, &h);
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return w;
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}
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else return 1;
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}
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void Font::write(Surface *surface, std::string const& text,
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int x, int y, HAlign halign, VAlign valign)
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{
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if (!font) {
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return;
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}
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if (text.empty()) {
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// SDL_ttf will return a nullptr when rendering the empty string.
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return;
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}
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switch (valign) {
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case VAlignTop:
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break;
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case VAlignMiddle:
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y -= lineSpacing / 2;
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break;
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case VAlignBottom:
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y -= lineSpacing;
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break;
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}
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SDL_Color color = { 0, 0, 0, 0 };
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SDL_Surface *s = TTF_RenderUTF8_Blended(font, text.c_str(), color);
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if (!s) {
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ERROR("Font rendering failed for text \"%s\"\n", text.c_str());
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return;
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}
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switch (halign) {
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case HAlignLeft:
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break;
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case HAlignCenter:
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x -= s->w / 2;
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break;
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case HAlignRight:
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x -= s->w;
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break;
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}
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SDL_Rect rect = { (Sint16) x, (Sint16) (y - 1), 0, 0 };
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SDL_BlitSurface(s, NULL, surface->raw, &rect);
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/* Note: rect.x / rect.y are reset everytime because SDL_BlitSurface
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* will modify them if negative */
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rect.x = x;
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rect.y = y + 1;
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SDL_BlitSurface(s, NULL, surface->raw, &rect);
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rect.x = x - 1;
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rect.y = y;
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SDL_BlitSurface(s, NULL, surface->raw, &rect);
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rect.x = x + 1;
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rect.y = y;
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SDL_BlitSurface(s, NULL, surface->raw, &rect);
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SDL_FreeSurface(s);
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rect.x = x;
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rect.y = y;
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color.r = 0xff;
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color.g = 0xff;
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color.b = 0xff;
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s = TTF_RenderUTF8_Blended(font, text.c_str(), color);
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if (!s) {
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ERROR("Font rendering failed for text \"%s\"\n", text.c_str());
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return;
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}
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SDL_BlitSurface(s, NULL, surface->raw, &rect);
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SDL_FreeSurface(s);
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}
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