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Fatbag 2012-04-10 00:07:25 -05:00
parent 7a5124a687
commit d9afae7022
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Client/Graphics/Font.cpp Normal file
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/*
Niotso - Copyright (C) 2012 Fatbag <X-Fi6@phppoll.org>
This program 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.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "../EngineInterface.hpp"
namespace Graphics {
FT_Library FreeTypeLibrary;
FT_Face FontFace;
static void FindStringSize(const wchar_t * String, unsigned * width, unsigned * height, int font){
int x = 0, y = 0;
int lowestx = 0, lowesty = 0, highestx = 0, highesty = 0;
for(wchar_t letter=*String; letter!='\0'; letter=*(++String)){
int error = FT_Load_Char(FontFace, letter, FT_LOAD_RENDER);
if(error) continue;
if(x < lowestx) lowestx = x;
if(y < lowesty) lowesty = y;
int newx = x + FontFace->glyph->bitmap.width + FontFace->glyph->bitmap_left;
int newy = y + FontFace->glyph->bitmap_top;
if(newx > highestx) highestx = newx;
if(newy > highesty) highesty = newy;
x += FontFace->glyph->advance.x >> 6;
y += FontFace->glyph->advance.y >> 6;
}
*width = highestx-lowestx, *height = highesty-lowesty;
}
void DrawText(Image_t * Image, const wchar_t * String, int x, int y, unsigned width, unsigned height,
TextAlignment Alignment, int font, COLORREF Color){
//x, y, width, height form the bounding rectangle into which the text should be drawn.
//(x,y) defines the offset to the top-left of the rectangle from the top left of the background.
//The destination image must be stored in bottom-up order.
if(x >= (signed)Image->Width || y >= (signed)Image->Height) return;
int Blue = GetBValue(Color), Green = GetGValue(Color), Red = GetRValue(Color);
//(stringx,stringy) will refer to the top-left of the string in bottom-up coordinates
int stringx, stringy;
unsigned StringWidth, StringHeight;
FindStringSize(String, &StringWidth, &StringHeight, font);
//Horizontal alignment
if(Alignment < 2) stringx = x; //Left
else if(Alignment < 4) stringx = x+(width-StringWidth+1)/2; //Middle
else stringx = x+width-StringWidth; //Right
//Vertical alignment
if(!(Alignment&1)) stringy = y; //Top
else stringy = y+(height-StringHeight+1)/2; //Middle
stringy = Image->Height-stringy-StringHeight;
//Now that we've done the alignment, we can crop the bounding box within the limits of the background image
if(x < 0){ Image->Width += x; x = 0; }
if(y < 0){ Image->Height += y; y = 0; }
if(width > Image->Width) width = Image->Width;
if(height > Image->Height) height = Image->Height;
for(wchar_t letter=*String; letter!='\0'; letter=*(++String)){
int error = FT_Load_Char(FontFace, letter, FT_LOAD_RENDER);
if(error) continue;
int cWidth = FontFace->glyph->bitmap.width, cHeight = FontFace->glyph->bitmap.rows;
if(cWidth && cHeight){
uint8_t * cRender; /* Convert to Bottom-up */
uint8_t * OriginalRender = FontFace->glyph->bitmap.buffer;
if(FontFace->glyph->bitmap.pitch > 0){
cRender = (uint8_t *) malloc(cWidth * cHeight);
for(int i=0; i<cHeight; i++)
memcpy(cRender + i*cWidth, OriginalRender + (cHeight-i-1)*cWidth, cWidth);
}else cRender = OriginalRender;
stringx += FontFace->glyph->bitmap_left;
stringy += FontFace->glyph->bitmap_top-cHeight;
for(int i=max(-stringy, 0); i<cHeight && (unsigned)stringy+i < height; i++){
for(int j=max(-stringx, 0); j<cWidth && (unsigned)stringx+j < width; j++){
int value = cRender[i*cWidth + j];
uint8_t *ptr = Image->Data + 3*((stringy+i)*width + (stringx+j));
int originalcolor;
originalcolor = *ptr;
*ptr++ = (uint8_t) (originalcolor + (int)((Blue-originalcolor)*2*value+255)/510);
originalcolor = *ptr;
*ptr++ = (uint8_t) (originalcolor + (int)((Green-originalcolor)*2*value+255)/510);
originalcolor = *ptr;
*ptr++ = (uint8_t) (originalcolor + (int)((Red-originalcolor)*2*value+255)/510);
}
}
stringx -= FontFace->glyph->bitmap_left;
stringy -= FontFace->glyph->bitmap_top-cHeight;
if(FontFace->glyph->bitmap.pitch > 0) free(cRender);
}
stringx += FontFace->glyph->advance.x >> 6;
stringy += FontFace->glyph->advance.y >> 6;
}
}
}