mirror of
git://projects.qi-hardware.com/gmenu2x.git
synced 2024-10-27 15:27:13 +02:00
197 lines
4.1 KiB
C++
197 lines
4.1 KiB
C++
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#include "sfontplus.h"
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#include <cassert>
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#include <SDL_image.h>
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#include <iostream>
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using namespace std;
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Uint32 SFontPlus::getPixel(Sint32 x, Sint32 y) {
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assert(x>=0);
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assert(x<surface->w);
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Uint32 Bpp = surface->format->BytesPerPixel;
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// Get the pixel
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switch(Bpp) {
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case 1:
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return *((Uint8 *)surface->pixels + y * surface->pitch + x);
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break;
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case 2:
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return *((Uint16 *)surface->pixels + y * surface->pitch/2 + x);
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break;
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case 3: { // Format/endian independent
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Uint8 *bits = ((Uint8 *)surface->pixels)+y*surface->pitch+x*Bpp;
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Uint8 r, g, b;
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r = *((bits)+surface->format->Rshift/8);
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g = *((bits)+surface->format->Gshift/8);
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b = *((bits)+surface->format->Bshift/8);
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return SDL_MapRGB(surface->format, r, g, b);
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}
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break;
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case 4:
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return *((Uint32 *)surface->pixels + y * surface->pitch/4 + x);
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break;
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}
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return 0;
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}
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SFontPlus::SFontPlus() {
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surface = NULL;
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}
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SFontPlus::SFontPlus(SDL_Surface* font) {
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surface = NULL;
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initFont(font);
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}
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SFontPlus::SFontPlus(string font) {
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surface = NULL;
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initFont(font);
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}
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SFontPlus::~SFontPlus() {
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freeFont();
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}
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bool SFontPlus::utf8Code(unsigned char c) {
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return (c>=194 && c<=198) || c==208 || c==209;
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//return c>=194;
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}
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void SFontPlus::initFont(string font, string characters) {
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SDL_Surface *buf = IMG_Load(font.c_str());
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if (buf!=NULL) {
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initFont( SDL_DisplayFormatAlpha(buf), characters );
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SDL_FreeSurface(buf);
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}
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}
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void SFontPlus::initFont(SDL_Surface *font, string characters) {
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freeFont();
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this->characters = characters;
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if (font==NULL) return;
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surface = font;
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Uint32 pink = SDL_MapRGB(surface->format, 255,0,255);
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#ifdef _DEBUG
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bool utf8 = false;
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for (uint x=0; x<characters.length(); x++) {
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if (!utf8) utf8 = (unsigned char)characters[x]>128;
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if (utf8) printf("%d\n", (unsigned char)characters[x]);
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}
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#endif
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uint c = 0;
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SDL_LockSurface(surface);
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for (uint x=0; x<(uint)surface->w && c<characters.length(); x++) {
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if (getPixel(x,0) == pink) {
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uint startx = x;
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charpos.push_back(x);
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x++;
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while (x<(uint)surface->w && getPixel(x,0) == pink) x++;
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charpos.push_back(x);
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//utf8 characters
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if (c>0 && utf8Code(characters[c-1])) {
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charpos.push_back(startx);
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charpos.push_back(x);
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c++;
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}
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c++;
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}
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}
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SDL_UnlockSurface(surface);
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Uint32 colKey = getPixel(0,surface->h-1);
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SDL_SetColorKey(surface, SDL_SRCCOLORKEY, colKey);
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string::size_type pos = characters.find("0")*2;
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SDL_Rect srcrect = {charpos[pos], 1, charpos[pos+2] - charpos[pos], surface->h-1};
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uint y = srcrect.h+1;
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bool nonKeyFound = false;
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while (y-->0 && !nonKeyFound) {
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uint x = srcrect.w+1;
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while (x-->0 && !nonKeyFound)
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nonKeyFound = getPixel(x+srcrect.x,y+srcrect.y) != colKey;
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}
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lineHeight = y+1;
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}
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void SFontPlus::freeFont() {
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if (surface!=NULL) {
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SDL_FreeSurface(surface);
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surface = NULL;
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}
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}
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void SFontPlus::write(SDL_Surface *s, string text, int x, int y) {
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if (text.empty()) return;
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string::size_type pos;
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SDL_Rect srcrect, dstrect;
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// these values won't change in the loop
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srcrect.y = 1;
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dstrect.y = y;
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srcrect.h = dstrect.h = surface->h-1;
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for(uint i=0; i<text.length() && x<surface->w; i++) {
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//Utf8 characters
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if (utf8Code(text[i]) && i+1<text.length()) {
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pos = characters.find(text.substr(i,2));
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i++;
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} else
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pos = characters.find(text[i]);
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if (pos == string::npos) {
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x += charpos[2]-charpos[1];
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continue;
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}
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pos *= 2;
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srcrect.x = charpos[pos];
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srcrect.w = charpos[pos+2] - charpos[pos];
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dstrect.x = x - charpos[pos+1] + charpos[pos];
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SDL_BlitSurface(surface, &srcrect, s, &dstrect);
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x += charpos[pos+2] - charpos[pos+1];
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}
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}
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uint SFontPlus::getTextWidth(string text) {
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string::size_type pos;
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int width = 0;
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for(uint x=0; x<text.length(); x++) {
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//Utf8 characters
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if (utf8Code(text[x]) && x+1<text.length()) {
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pos = characters.find(text.substr(x,2));
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x++;
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} else
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pos = characters.find(text[x]);
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if (pos == string::npos) {
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width += charpos[2]-charpos[1];
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continue;
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}
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pos *= 2;
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width += charpos[pos+2] - charpos[pos+1];
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}
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return width;
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}
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uint SFontPlus::getHeight() {
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return surface->h - 1;
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}
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uint SFontPlus::getLineHeight() {
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return lineHeight;
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}
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