hedgewars/PNGh.pas
author nemo
Sat, 30 Mar 2013 08:11:09 -0400
changeset 8822 fc9877ff7f1a
parent 8697 9624836094de
child 9080 9b42757d7e71
permissions -rw-r--r--
Don't reward digging close w/ drill rocket. Doesn't offer much benefit. Reduce final bonus slightly to avoid using drill like bazooka. Better would be AI doing this for all weps based on count. Make main drill loop a little more efficient.
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(*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2004-2012 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 *)
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{$INCLUDE "options.inc"}
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unit PNGh;
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interface
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uses png;
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{$IFDEF DARWIN}
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    {$linklib png}
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{$ENDIF}
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const
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    // Constants for libpng, they are not defined in png unit.
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    // We actually do not need all of them.
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    // These describe the color_type field in png_info.
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    // color type masks
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    PNG_COLOR_MASK_PALETTE = 1;
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    PNG_COLOR_MASK_COLOR   = 2;
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    PNG_COLOR_MASK_ALPHA   = 4;
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    // color types.  Note that not all combinations are legal
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    PNG_COLOR_TYPE_GRAY       = 0;
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    PNG_COLOR_TYPE_PALETTE    = PNG_COLOR_MASK_COLOR or PNG_COLOR_MASK_PALETTE;
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    PNG_COLOR_TYPE_RGB        = PNG_COLOR_MASK_COLOR;
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    PNG_COLOR_TYPE_RGB_ALPHA  = PNG_COLOR_MASK_COLOR or PNG_COLOR_MASK_ALPHA;
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    PNG_COLOR_TYPE_GRAY_ALPHA = PNG_COLOR_MASK_ALPHA;
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    // aliases
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    PNG_COLOR_TYPE_RGBA = PNG_COLOR_TYPE_RGB_ALPHA;
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    PNG_COLOR_TYPE_GA   = PNG_COLOR_TYPE_GRAY_ALPHA;
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    // This is for compression type. PNG 1.0-1.2 only define the single type.
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    PNG_COMPRESSION_TYPE_BASE    = 0; // Deflate method 8, 32K window
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    PNG_COMPRESSION_TYPE_DEFAULT = PNG_COMPRESSION_TYPE_BASE;
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    // This is for filter type. PNG 1.0-1.2 only define the single type.
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    PNG_FILTER_TYPE_BASE        = 0;  // Single row per-byte filtering
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    PNG_INTRAPIXEL_DIFFERENCING = 64; // Used only in MNG datastreams
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    PNG_FILTER_TYPE_DEFAULT     = PNG_FILTER_TYPE_BASE;
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    // These are for the interlacing type.  These values should NOT be changed.
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    PNG_INTERLACE_NONE  = 0; // Non-interlaced image
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    PNG_INTERLACE_ADAM7 = 1; // Adam7 interlacing
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    PNG_INTERLACE_LAST  = 2; // Not a valid value
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type
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    // where is better place for this definition?
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    PFile = ^file;
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procedure png_init_pascal_io(png_ptr: png_structp; pf : PFile);
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implementation
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// We cannot get c-style FILE* pointer to pass it to libpng, so we implement our own writing functions
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procedure PngWriteData(png_ptr: png_structp; p: PByte; len: png_size_t); cdecl;
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begin
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    BlockWrite( PFile(png_get_io_ptr(png_ptr))^, p^, len);
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end;
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procedure PngFlushData(png_ptr: png_structp); cdecl;
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begin
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end;
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procedure png_init_pascal_io(png_ptr: png_structp; pf : PFile);
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begin
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    png_set_write_fn(png_ptr, pf, @PngWriteData, @PngFlushData);
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end;
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end.