gvdevice_quartz.c

Go to the documentation of this file.

/*************************************************************************
 * 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 "gvplugin_quartz.h"
#include <stdbool.h>
#include <TargetConditionals.h>
#include <util/gv_math.h>
 
#if !TARGET_OS_IPHONE && defined(HAVE_PANGOCAIRO)
 
static const void *memory_data_consumer_get_byte_pointer(void *info)
{
        return info;
}
 
CGDataProviderDirectCallbacks memory_data_provider_callbacks = {
        0,
        memory_data_consumer_get_byte_pointer,
        NULL,
        NULL,
        NULL
};
 
static void quartz_format(GVJ_t *job)
{
        /* image destination -> data consumer -> job's gvdevice */
        /* data provider <- job's imagedata */
        CGDataConsumerRef data_consumer = CGDataConsumerCreate(job, &device_data_consumer_callbacks);
        CGImageDestinationRef image_destination =
          CGImageDestinationCreateWithDataConsumer(data_consumer,
            format_to_uti((format_type)job->device.id), 1, NULL);
        CGDataProviderRef data_provider = CGDataProviderCreateDirect(job->imagedata, BYTES_PER_PIXEL * job->width * job->height, &memory_data_provider_callbacks);
        
        CFStringRef keys[] = {kCGImagePropertyDPIWidth, kCGImagePropertyDPIHeight};
        CFNumberRef values[] = {
                CFNumberCreate(NULL, kCFNumberDoubleType, &job->dpi.x),
                CFNumberCreate(NULL, kCFNumberDoubleType, &job->dpi.y)
        };
        CFDictionaryRef dpi = CFDictionaryCreate(NULL, (const void **)keys,
                                                 (const void **)values,
                                                 sizeof(keys) / sizeof(keys[0]),
                                                 &kCFTypeDictionaryKeyCallBacks,
                                                 &kCFTypeDictionaryValueCallBacks);
 
        /* add the bitmap image to the destination and save it */
        CGColorSpaceRef color_space = CGColorSpaceCreateWithName(kCGColorSpaceSRGB);
        CGImageRef image = CGImageCreate (
                job->width,                                                     /* width in pixels */
                job->height,                                            /* height in pixels */
                BITS_PER_COMPONENT,                                     /* bits per component */
                BYTES_PER_PIXEL * 8,                            /* bits per pixel */
                BYTES_PER_PIXEL * job->width,           /* bytes per row: exactly width # of pixels */
                color_space,                                            /* color space: sRGB */
                kCGImageAlphaPremultipliedFirst|kCGBitmapByteOrder32Little,     /* bitmap info: corresponds to CAIRO_FORMAT_ARGB32 */
                data_provider,                                          /* data provider: from imagedata */
                NULL,                                                           /* decode: don't remap colors */
                false, // don't interpolate
                kCGRenderingIntentDefault                       /* rendering intent (what to do with out-of-gamut colors): default */
        );
        CGImageDestinationAddImage(image_destination, image, dpi);
        CGImageDestinationFinalize(image_destination);
        
        /* clean up */
        CGImageRelease(image);
        CGColorSpaceRelease(color_space);
        CGDataProviderRelease(data_provider);
        if (image_destination)
                CFRelease(image_destination);
        if (dpi != NULL)
                CFRelease(dpi);
        CGDataConsumerRelease(data_consumer);
}
 
static gvdevice_engine_t quartz_engine = {
    NULL,               /* quartz_initialize */
    quartz_format,
    NULL,               /* quartz_finalize */
};
 
static gvdevice_features_t device_features_quartz = {
        GVDEVICE_BINARY_FORMAT        
          | GVDEVICE_DOES_TRUECOLOR,/* flags */
        {0.,0.},                    /* default margin - points */
        {0.,0.},                    /* default page width, height - points */
        {96.,96.},                  /* dpi */
};
 
gvplugin_installed_t gvdevice_quartz_types_for_cairo[] = {
        {FORMAT_BMP, "bmp:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_GIF, "gif:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_EXR, "exr:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_ICNS, "icns:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_ICO, "ico:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_JPEG, "jpe:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_JPEG, "jpeg:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_JPEG, "jpg:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_JPEG2000, "jp2:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_PICT, "pct:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_PICT, "pict:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_PNG, "png:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_PSD, "psd:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_SGI, "sgi:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_TIFF, "tif:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_TIFF, "tiff:cairo", 7, &quartz_engine, &device_features_quartz},
        {FORMAT_TGA, "tga:cairo", 7, &quartz_engine, &device_features_quartz},
        {0, NULL, 0, NULL, NULL}
};
 
#endif