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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 <gvc/gvplugin_device.h>
#include <IL/il.h>
#include <IL/ilu.h>
#include <stdint.h>
#include <string.h>
#include <util/gv_math.h>
/// flip the row ordering of image data
///
/// @param width Width of the image in pixels
/// @param height Height of the image in pixels
/// @param data [inout] Image content in 4-byte-per-pixel, row-major format
static void Y_inv(unsigned width, unsigned height, unsigned char *data) {
unsigned int x, y;
unsigned char *a = data;
unsigned char *b = a + (height - 1) * width * sizeof(uint32_t);
for (y = 0; y < height/2; y++) {
for (x = 0; x < width; x++) {
uint32_t t;
memcpy(&t, a, sizeof(t));
memcpy(a, b, sizeof(t));
a += sizeof(uint32_t);
memcpy(b, &t, sizeof(t));
b += sizeof(uint32_t);
}
b -= 2 * width * sizeof(uint32_t);
}
}
static void devil_format(GVJ_t * job)
{
ILuint ImgId;
// Check if the shared lib's version matches the executable's version.
if (ilGetInteger(IL_VERSION_NUM) < IL_VERSION ||
iluGetInteger(ILU_VERSION_NUM) < ILU_VERSION) {
fprintf(stderr, "DevIL version is different...exiting!\n");
}
// Initialize DevIL.
ilInit();
// Generate the main image name to use.
ilGenImages(1, &ImgId);
// Bind this image name.
ilBindImage(ImgId);
// cairo's in-memory image format needs inverting for DevIL
Y_inv ( job->width, job->height, job->imagedata );
// let the DevIL do its thing
(void)ilTexImage(job->width, job->height,
1, // Depth
BYTES_PER_PIXEL,
IL_BGRA, // Format
IL_UNSIGNED_BYTE,// Type
job->imagedata);
// check the last step succeeded
ILenum Error = ilGetError();
if (Error == 0) {
// output to the provided open file handle
ilSaveF((ILenum)job->device.id, job->output_file);
} else {
fprintf(stderr, "Error: %s\n", iluErrorString(Error));
}
// We're done with the image, so delete it.
ilDeleteImages(1, &ImgId);
// Simple Error detection loop that displays the Error to the user in a human-readable form.
while ((Error = ilGetError())) {
fprintf(stderr, "Error: %s\n", iluErrorString(Error));
}
}
static gvdevice_engine_t devil_engine = {
NULL, /* devil_initialize */
devil_format,
NULL, /* devil_finalize */
};
static gvdevice_features_t device_features_devil = {
GVDEVICE_BINARY_FORMAT
| GVDEVICE_NO_WRITER
| GVDEVICE_DOES_TRUECOLOR,/* flags */
{0.,0.}, /* default margin - points */
{0.,0.}, /* default page width, height - points */
{96.,96.}, /* svg 72 dpi */
};
gvplugin_installed_t gvdevice_devil_types[] = {
{IL_BMP, "bmp:cairo", -1, &devil_engine, &device_features_devil},
{IL_JPG, "jpg:cairo", -1, &devil_engine, &device_features_devil},
{IL_JPG, "jpe:cairo", -1, &devil_engine, &device_features_devil},
{IL_JPG, "jpeg:cairo", -1, &devil_engine, &device_features_devil},
{IL_PNG, "png:cairo", -1, &devil_engine, &device_features_devil},
{IL_TIF, "tif:cairo", -1, &devil_engine, &device_features_devil},
{IL_TIF, "tiff:cairo", -1, &devil_engine, &device_features_devil},
{IL_TGA, "tga:cairo", -1, &devil_engine, &device_features_devil},
{0, NULL, 0, NULL, NULL}
};
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