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/**
* $Id:
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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 2
* 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, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2009 Blender Foundation.
* All rights reserved.
*
*
* Contributor(s): Blender Foundation
*
* ***** END GPL LICENSE BLOCK *****
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "BIF_gl.h"
unsigned int blf_next_p2(unsigned int x)
{
x -= 1;
x |= (x >> 16);
x |= (x >> 8);
x |= (x >> 4);
x |= (x >> 2);
x |= (x >> 1);
x += 1;
return(x);
}
unsigned int blf_hash(unsigned int val)
{
unsigned int key;
key= val;
key += ~(key << 16);
key ^= (key >> 5);
key += (key << 3);
key ^= (key >> 13);
key += ~(key << 9);
key ^= (key >> 17);
return(key % 257);
}
/*
* This function is from Imlib2 library (font_main.c), a
* library that does image file loading and saving as well
* as rendering, manipulation, arbitrary polygon support, etc.
*
* Copyright (C) 2000 Carsten Haitzler and various contributors
* The original name: imlib_font_utf8_get_next
* more info here: http://docs.enlightenment.org/api/imlib2/html/
*/
int blf_utf8_next(unsigned char *buf, int *iindex)
{
/* Reads UTF8 bytes from 'buf', starting at 'index' and
* returns the code point of the next valid code point.
* 'index' is updated ready for the next call.
*
* Returns 0 to indicate an error (e.g. invalid UTF8)
*/
int index= *iindex, r;
unsigned char d= buf[index++], d2, d3, d4;
if (!d)
return(0);
if (d < 0x80) {
*iindex= index;
return(d);
}
if ((d & 0xe0) == 0xc0) {
/* 2 byte */
d2= buf[index++];
if ((d2 & 0xc0) != 0x80)
return(0);
r= d & 0x1f; /* copy lower 5 */
r <<= 6;
r |= (d2 & 0x3f); /* copy lower 6 */
}
else if ((d & 0xf0) == 0xe0) {
/* 3 byte */
d2= buf[index++];
d3= buf[index++];
if ((d2 & 0xc0) != 0x80 || (d3 & 0xc0) != 0x80)
return(0);
r= d & 0x0f; /* copy lower 4 */
r <<= 6;
r |= (d2 & 0x3f);
r <<= 6;
r |= (d3 & 0x3f);
}
else {
/* 4 byte */
d2= buf[index++];
d3= buf[index++];
d4= buf[index++];
if ((d2 & 0xc0) != 0x80 || (d3 & 0xc0) != 0x80 ||
(d4 & 0xc0) != 0x80)
return(0);
r= d & 0x0f; /* copy lower 4 */
r <<= 6;
r |= (d2 & 0x3f);
r <<= 6;
r |= (d3 & 0x3f);
r <<= 6;
r |= (d4 & 0x3f);
}
*iindex= index;
return(r);
}
void blf_texture_draw(float uv[2][2], float dx, float y1, float dx1, float y2)
{
glBegin(GL_QUADS);
glTexCoord2f(uv[0][0], uv[0][1]);
glVertex2f(dx, y1);
glTexCoord2f(uv[0][0], uv[1][1]);
glVertex2f(dx, y2);
glTexCoord2f(uv[1][0], uv[1][1]);
glVertex2f(dx1, y2);
glTexCoord2f(uv[1][0], uv[0][1]);
glVertex2f(dx1, y1);
glEnd();
}
void blf_texture5_draw(float uv[2][2], float x1, float y1, float x2, float y2)
{
float soft[25]= {
1/60.0f, 1/60.0f, 2/60.0f, 1/60.0f, 1/60.0f,
1/60.0f, 3/60.0f, 5/60.0f, 3/60.0f, 1/60.0f,
2/60.0f, 5/60.0f, 8/60.0f, 5/60.0f, 2/60.0f,
1/60.0f, 3/60.0f, 5/60.0f, 3/60.0f, 1/60.0f,
1/60.0f, 1/60.0f, 2/60.0f, 1/60.0f, 1/60.0f};
float color[4], *fp= soft;
int dx, dy;
glGetFloatv(GL_CURRENT_COLOR, color);
for(dx=-2; dx<3; dx++) {
for(dy=-2; dy<3; dy++, fp++) {
glColor4f(color[0], color[1], color[2], fp[0]*color[3]);
blf_texture_draw(uv, x1+dx, y1+dy, x2+dx, y2+dy);
}
}
glColor4fv(color);
}
void blf_texture3_draw(float uv[2][2], float x1, float y1, float x2, float y2)
{
float soft[9]= {1/16.0f, 2/16.0f, 1/16.0f, 2/16.0f, 4/16.0f, 2/16.0f, 1/16.0f, 2/16.0f, 1/16.0f};
float color[4], *fp= soft;
int dx, dy;
glGetFloatv(GL_CURRENT_COLOR, color);
for(dx=-1; dx<2; dx++) {
for(dy=-1; dy<2; dy++, fp++) {
glColor4f(color[0], color[1], color[2], fp[0]*color[3]);
blf_texture_draw(uv, x1+dx, y1+dy, x2+dx, y2+dy);
}
}
glColor4fv(color);
}
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