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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/glcompimage.h>
#include <glcomp/glcompfont.h>
#include <glcomp/glcompset.h>
#include <glcomp/glutils.h>
#include <glcomp/glcomptexture.h>
#include <stdbool.h>
#include <stddef.h>
#include <util/alloc.h>
glCompImage *glCompImageNew(void *par, float x, float y) {
glCompImage *p = gv_alloc(sizeof(glCompImage));
glCompInitCommon(&p->base, par, x, y);
p->texture = NULL;
p->base.common.functions.draw = glCompImageDraw;
return p;
}
/* glCompImageNewFile:
* Creates image from given input file.
* At present, we assume png input.
* Return 0 on failure.
*/
glCompImage *glCompImageNewFile(float x, float y, const char *imgfile) {
int imageWidth, imageHeight;
cairo_surface_t *surface = NULL;
const unsigned char *data = glCompLoadPng(&surface, imgfile, &imageWidth,
&imageHeight);
glCompImage *p;
if (!data) return NULL;
p = glCompImageNew(NULL, x, y);
if (!glCompImageLoad(p, data, imageWidth, imageHeight, 0)) {
glCompImageDelete (p);
p = NULL;
}
cairo_surface_destroy(surface);
return p;
}
void glCompImageDelete(glCompImage * p)
{
glCompEmptyCommon(&p->base.common);
if (p->texture)
glCompDeleteTexture(p->texture);
free(p);
}
int glCompImageLoad(glCompImage *i, const unsigned char *data, int width,
int height, bool is2D) {
if (data != NULL) { /*valid image data */
glCompDeleteTexture(i->texture);
i->texture =
glCompSetAddNewTexImage(i->base.common.compset, width, height, data,
is2D);
if (i->texture) {
i->base.common.width = width;
i->base.common.height = height;
return 1;
}
}
return 0;
}
int glCompImageLoadPng(glCompImage *i, const char *pngFile) {
int imageWidth, imageHeight;
cairo_surface_t *surface = NULL;
const unsigned char *data = glCompLoadPng(&surface, pngFile, &imageWidth,
&imageHeight);
if (data == NULL) {
return 0;
}
const int rc = glCompImageLoad(i, data, imageWidth, imageHeight, 1);
cairo_surface_destroy(surface);
return rc;
}
void glCompImageDraw(void *obj)
{
glCompImage *p = obj;
glCompCommon ref = p->base.common;
float w,h,d;
glCompCalcWidget(p->base.common.parent, &p->base.common, &ref);
if (!p->base.common.visible)
return;
if (!p->texture)
return;
if(p->texture->id <=0)
{
glRasterPos2f(ref.pos.x, ref.pos.y);
glDrawPixels(p->texture->width, p->texture->height, GL_RGBA,GL_UNSIGNED_BYTE, p->texture->data);
}
else
{
w = p->width;
h = p->height;
d = (float)p->base.common.layer * GLCOMPSET_BEVEL_DIFF;
glDisable(GL_BLEND);
glEnable(GL_TEXTURE_2D);
glTexEnvf (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
glBindTexture(GL_TEXTURE_2D,p->texture->id);
glBegin(GL_QUADS);
glTexCoord2d(0.0f, 1.0f);glVertex3d(ref.pos.x,ref.pos.y,d);
glTexCoord2d(1.0f, 1.0f);glVertex3d(ref.pos.x+w,ref.pos.y,d);
glTexCoord2d(1.0f, 0.0f);glVertex3d(ref.pos.x+w,ref.pos.y+h,d);
glTexCoord2d(0.0f, 0.0f);glVertex3d(ref.pos.x,ref.pos.y+h,d);
glEnd();
glDisable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
}
}
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