metafile-inout.h

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// SPDX-License-Identifier: GPL-2.0-or-later
 * Authors:
 *   David Mathog
 *
 * Copyright (C) 2013 Authors
 * Released under GNU GPL v2+, read the file 'COPYING' for more information.
 */
 
#ifndef SEEN_INKSCAPE_EXTENSION_INTERNAL_METAFILE_INOUT_H
#define SEEN_INKSCAPE_EXTENSION_INTERNAL_METAFILE_INOUT_H
 
#define PNG_SKIP_SETJMP_CHECK // else any further png.h include blows up in the compiler
#include <png.h>
#include <cstdio>
#include <cstdlib>
#include <cstdint>
#include <map>
#include <stack>
#include <glibmm/ustring.h>
#include <3rdparty/libuemf/uemf.h>
#include <2geom/affine.h>
#include <2geom/pathvector.h>
 
#include "extension/implementation/implementation.h"
#include "colors/utils.h"
 
constexpr uint32_t U_RGB_COMPOSE(U_COLORREF c)
{
    return SP_RGBA32_U_COMPOSE(U_RGBAGetR(c), U_RGBAGetG(c), U_RGBAGetB(c), 0xff);
}
constexpr uint32_t U_RGBA_COMPOSE(U_COLORREF c)
{
    return SP_RGBA32_U_COMPOSE(U_RGBAGetR(c), U_RGBAGetG(c), U_RGBAGetB(c), U_RGBAGetA(c));
}
 
class SPObject;
 
namespace Inkscape {
class Pixbuf;
 
namespace Extension {
namespace Internal {
 
/* A coloured pixel. */
struct pixel_t {
    uint8_t red;
    uint8_t green;
    uint8_t blue;
    uint8_t opacity;
};
 
/* A picture. */
struct bitmap_t {
    pixel_t *pixels;
    size_t width;
    size_t height;
};
    
/* structure to store PNG image bytes */
struct MEMPNG {
      char *buffer;
      size_t size;
};
using PMEMPNG = MEMPNG *;
 
class Metafile
    : public Inkscape::Extension::Implementation::Implementation
{
public:
    Metafile() = default;
    ~Metafile() override;
 
protected:
    static uint32_t    sethexcolor(U_COLORREF color);
    static pixel_t    *pixel_at (bitmap_t * bitmap, int x, int y);
    static void        my_png_write_data(png_structp png_ptr, png_bytep data, png_size_t length);
    static void        toPNG(PMEMPNG accum, int width, int height, const char *px);
    static gchar      *bad_image_png();
    static void        setViewBoxIfMissing(SPDocument *doc);
    static int         combine_ops_to_livarot(const int op);
 
 
private:
};
 
} // namespace Internal
} // namespace Extension
} // namespace Inkscape
 
#endif // SEEN_INKSCAPE_EXTENSION_INTERNAL_METAFILE_INOUT_H
 
/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/