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Imported from libpng-0.99p.tar

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This commit is contained in:
Glenn Randers-Pehrson
1998-03-08 22:55:17 -06:00
parent 38d73aff67
commit 4922b1b6e9
31 changed files with 196 additions and 122 deletions
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26
pngwutil.c
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@@ -1,12 +1,12 @@
/* pngwutil.c - utilities to write a PNG file
*
* libpng 1.00
* libpng 1.0.1
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* March 7, 1998
* March 9, 1998
*/
#define PNG_INTERNAL
@@ -340,8 +340,8 @@ png_write_gAMA(png_structp png_ptr, double file_gamma)
png_byte buf[4];
png_debug(1, "in png_write_gAMA\n");
/* file_gamma is saved in 1/100,000ths */
igamma = (png_uint_32)(file_gamma * 100000.0 + 0.5);
/* file_gamma is saved in 1/1.0.100ths */
igamma = (png_uint_32)(file_gamma * 1.0.10.0 + 0.5);
png_save_uint_32(buf, igamma);
png_write_chunk(png_ptr, png_gAMA, buf, (png_size_t)4);
}
@@ -426,16 +426,16 @@ png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
png_byte buf[32];
png_debug(1, "in png_write_cHRM\n");
/* each value is saved int 1/100,000ths */
/* each value is saved int 1/1.0.100ths */
if (white_x < 0 || white_x > 0.8 || white_y < 0 || white_y > 0.8 ||
white_x + white_y > 1.0)
{
png_warning(png_ptr, "Invalid cHRM white point specified");
return;
}
itemp = (png_uint_32)(white_x * 100000.0 + 0.5);
itemp = (png_uint_32)(white_x * 1.0.10.0 + 0.5);
png_save_uint_32(buf, itemp);
itemp = (png_uint_32)(white_y * 100000.0 + 0.5);
itemp = (png_uint_32)(white_y * 1.0.10.0 + 0.5);
png_save_uint_32(buf + 4, itemp);
if (red_x < 0 || red_x > 0.8 || red_y < 0 || red_y > 0.8 ||
@@ -444,9 +444,9 @@ png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
png_warning(png_ptr, "Invalid cHRM red point specified");
return;
}
itemp = (png_uint_32)(red_x * 100000.0 + 0.5);
itemp = (png_uint_32)(red_x * 1.0.10.0 + 0.5);
png_save_uint_32(buf + 8, itemp);
itemp = (png_uint_32)(red_y * 100000.0 + 0.5);
itemp = (png_uint_32)(red_y * 1.0.10.0 + 0.5);
png_save_uint_32(buf + 12, itemp);
if (green_x < 0 || green_x > 0.8 || green_y < 0 || green_y > 0.8 ||
@@ -455,9 +455,9 @@ png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
png_warning(png_ptr, "Invalid cHRM green point specified");
return;
}
itemp = (png_uint_32)(green_x * 100000.0 + 0.5);
itemp = (png_uint_32)(green_x * 1.0.10.0 + 0.5);
png_save_uint_32(buf + 16, itemp);
itemp = (png_uint_32)(green_y * 100000.0 + 0.5);
itemp = (png_uint_32)(green_y * 1.0.10.0 + 0.5);
png_save_uint_32(buf + 20, itemp);
if (blue_x < 0 || blue_x > 0.8 || blue_y < 0 || blue_y > 0.8 ||
@@ -466,9 +466,9 @@ png_write_cHRM(png_structp png_ptr, double white_x, double white_y,
png_warning(png_ptr, "Invalid cHRM blue point specified");
return;
}
itemp = (png_uint_32)(blue_x * 100000.0 + 0.5);
itemp = (png_uint_32)(blue_x * 1.0.10.0 + 0.5);
png_save_uint_32(buf + 24, itemp);
itemp = (png_uint_32)(blue_y * 100000.0 + 0.5);
itemp = (png_uint_32)(blue_y * 1.0.10.0 + 0.5);
png_save_uint_32(buf + 28, itemp);
png_write_chunk(png_ptr, png_cHRM, buf, (png_size_t)32);