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/*************************************************************************
* Copyright (c) 2011 AT&T Intellectual Property
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-v10.html
*
* Contributors: Details at https://graphviz.org
*************************************************************************/
#include "config.h"
#include <glcomp/glcompfont.h>
#include <glcomp/glcompset.h>
#include <glcomp/glpangofont.h>
#include <glcomp/glcomptexture.h>
#include <glcomp/glutils.h>
#include <GL/glut.h>
#include <stdbool.h>
#include <stddef.h>
#include <util/alloc.h>
static void print_bitmap_string(void *font, char *s)
{
if (s && strlen(s)) {
while (*s) {
glutBitmapCharacter(font, *s);
s++;
}
}
}
void glprintfglut(void *font, float xpos, float ypos, float zpos, char *bf) {
glRasterPos3f(xpos, ypos, zpos + 0.001f);
print_bitmap_string(font, bf);
}
void glDeleteFont(glCompFont * f)
{
free(f->fontdesc);
if (f->tex)
glCompDeleteTexture(f->tex);
*f = (glCompFont){0};
}
glCompFont glNewFont(glCompSet *s, const char *text, glCompColor *c,
char *fontdesc, int fs, bool is2D) {
glCompFont font = {0};
font.color.R = c->R;
font.color.G = c->G;
font.color.B = c->B;
font.color.A = c->A;
font.justify.VJustify = glFontVJustifyNone;
font.justify.HJustify = glFontHJustifyNone;
font.is2D = is2D;
font.glutfont = NULL;
font.fontdesc = gv_strdup(fontdesc);
font.size = fs;
font.transparent = 1;
if (text)
font.tex =
glCompSetAddNewTexLabel(s, font.fontdesc, font.size, text,
is2D);
return font;
}
glCompFont glNewFontFromParent(glCompObj *o, const char *text) {
glCompCommon *parent;
glCompFont font = {0};
parent = o->common.parent;
if (parent) {
parent = o->common.parent;
font.color.R = parent->font.color.R;
font.color.G = parent->font.color.G;
font.color.B = parent->font.color.B;
font.color.A = parent->font.color.A;
font.glutfont = parent->font.glutfont;
font.fontdesc = gv_strdup(parent->font.fontdesc);
font.size = parent->font.size;
font.transparent = parent->font.transparent;
font.justify.VJustify = parent->font.justify.VJustify;
font.justify.HJustify = parent->font.justify.HJustify;
font.is2D = parent->font.is2D;
if (text) {
if (strlen(text))
font.tex =
glCompSetAddNewTexLabel(parent->compset,
font.fontdesc, font.size,
text, parent->font.is2D);
}
} else { /*no parent */
glCompColor c;
c.R = GLCOMPSET_FONT_COLOR_R;
c.G = GLCOMPSET_FONT_COLOR_G;
c.B = GLCOMPSET_FONT_COLOR_B;
c.A = GLCOMPSET_FONT_COLOR_ALPHA;
font = glNewFont(o->common.compset, text, &c,
GLCOMPSET_FONT_DESC, GLCOMPSET_FONT_SIZE, true);
}
return font;
}
/*texture base 3d text rendering*/
void glCompDrawText3D(glCompFont f, float x, float y, double z, float w,
float h) {
glEnable(GL_BLEND); // Turn Blending On
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_TEXTURE_2D);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBindTexture(GL_TEXTURE_2D, f.tex->id);
glBegin(GL_QUADS);
glTexCoord2d(0.0f, 1.0f);glVertex3d(x,y,z);
glTexCoord2d(1.0f, 1.0f);glVertex3d(x+w,y,z);
glTexCoord2d(1.0f, 0.0f);glVertex3d(x+w,y+h,z);
glTexCoord2d(0.0f, 0.0f);glVertex3d(x,y+h,z);
glEnd();
glDisable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
}
void glCompDrawText(glCompFont f, double x, double y) {
glRasterPos2d(x, y);
glDrawPixels(f.tex->width, f.tex->height, GL_RGBA, GL_UNSIGNED_BYTE, f.tex->data);
}
/*text rendering functions, depends on a globject to retrieve stats*/
void glCompRenderText(glCompFont f, glCompObj *parentObj) {
if (!f.tex)
return;
float x = 0;
float y = 0;
glCompCommon ref = parentObj->common;
switch (f.justify.HJustify) {
case glFontHJustifyNone:
x = ref.refPos.x;
break;
case glFontHJustifyCenter:
x = ref.refPos.x + (ref.width - (float)f.tex->width) / 2.0f;
break;
}
switch (f.justify.VJustify) {
case glFontVJustifyNone:
y = ref.pos.y;
break;
case glFontVJustifyCenter:
y = ref.refPos.y + (ref.height - (float)f.tex->height) / 2.0f;
break;
}
glCompSetColor(f.color);
glCompDrawText(f, x, y);
}
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