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ASFont: only convert font surface if it is not already in a 32bpp format.

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This commit is contained in:
Maarten ter Huurne 2011-05-12 01:20:26 +02:00
parent db5ebff16f
commit 41e6e4693e
1 changed files with 28 additions and 15 deletions
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43
src/asfont.cpp
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@ -4,6 +4,7 @@
#include "utilities.h"
#include <cassert>
#include <cstring>
#define SFONTPLUS_CHARSET "!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~¡¿ÀÁÈÉÌÍÒÓÙÚÝÄËÏÖÜŸÂÊÎÔÛÅÃÕÑÆÇČĎĚĽĹŇÔŘŔŠŤŮŽàáèéìíòóùúýäëïöüÿâêîôûåãõñæçčďěľĺňôřŕšťžůðßÐÞþАБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдеёжзийклмнопрстуфхцчшщъыьэюяØøąćęłńśżźĄĆĘŁŃŚŻŹ"
@ -40,28 +41,41 @@ Uint32 ASFont::getPixel(Sint32 x, Sint32 y) {
return 0;
}
ASFont::ASFont(const std::string &fontImagePath) {
this->characters = SFONTPLUS_CHARSET;
ASFont::ASFont(const std::string &fontImagePath)
: characters(SFONTPLUS_CHARSET)
{
// Load PNG file into an SDL surface.
SDL_Surface *buf = loadPNG(fontImagePath);
if (!buf) {
surface = NULL;
return;
}
surface = SDL_DisplayFormatAlpha(buf);
SDL_FreeSurface(buf);
// Make sure we have a surface that can be blitted using alpha blending.
if (buf->format->BytesPerPixel == 4) {
surface = buf;
SDL_SetAlpha(surface, SDL_SRCALPHA, 255);
} else {
SDL_PixelFormat format32;
memset(&format32, 0, sizeof(format32));
format32.BitsPerPixel = 32;
format32.BytesPerPixel = 4;
format32.Rmask =
SDL_BYTEORDER == SDL_BIG_ENDIAN ? 0x00FF0000 : 0x000000FF;
format32.Gmask = 0x0000FF00;
format32.Bmask =
SDL_BYTEORDER == SDL_BIG_ENDIAN ? 0x000000FF : 0x00FF0000;
format32.Amask = 0xFF000000;
format32.Rshift = SDL_BYTEORDER == SDL_BIG_ENDIAN ? 16 : 0;
format32.Gshift = 8;
format32.Bshift = SDL_BYTEORDER == SDL_BIG_ENDIAN ? 0 : 16;
format32.Ashift = 24;
surface = SDL_ConvertSurface(buf, &format32, SDL_SRCALPHA);
SDL_FreeSurface(buf);
}
Uint32 pink = SDL_MapRGB(surface->format, 255,0,255);
#ifdef DEBUG
bool utf8 = false;
for (unsigned x=0; x<characters.length(); x++) {
if (!utf8) utf8 = (unsigned char)characters[x]>128;
if (utf8) DEBUG("%d\n", (unsigned char)characters[x]);
}
#endif
unsigned c = 0;
SDL_LockSurface(surface);
for (unsigned x=0; x<(unsigned)surface->w && c<characters.length(); x++) {
if (getPixel(x,0) == pink) {
@ -84,7 +98,6 @@ ASFont::ASFont(const std::string &fontImagePath) {
}
SDL_UnlockSurface(surface);
Uint32 colKey = getPixel(0,surface->h-1);
SDL_SetColorKey(surface, SDL_SRCCOLORKEY, colKey);
std::string::size_type pos = characters.find("0")*2;
SDL_Rect srcrect = {charpos[pos], 1, charpos[pos+2] - charpos[pos], surface->h - 1};
unsigned y = srcrect.h;