Imported from libpng-1.0.2a.tar
diff --git a/png.h b/png.h
index 0183b49..93b55c9 100644
--- a/png.h
+++ b/png.h
@@ -1,11 +1,10 @@
/* png.h - header file for PNG reference library
*
- * libpng 1.0.2 - June 14, 1998
- * For conditions of distribution and use, see the COPYRIGHT NOTICE below.
+ * libpng version 1.0.2a - December 29, 1998
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
- * Copyright (c) 1998 Glenn Randers-Pehrson
+ * Copyright (c) 1998, Glenn Randers-Pehrson
*
* Note about libpng version numbers:
*
@@ -31,6 +30,9 @@
* 1.0.0 1.0.0 100 2.1.0 [int should be 10000]
* 1.0.1 1.0.1 10001 2.1.0
* 1.0.1a-e 1.0.1a-e 10002 2.1.0.1a-e
+ * 1.0.2 1.0.2 10002 2.1.0.2
+ * 1.0.2a 1.0.2a 10003 2.1.0.2a
+ * 1.0.3 1.0.3 10003 2.1.0.3
*
* Henceforth the source version will match the shared-library minor
* and patch numbers; the shared-library major version number will be
@@ -117,14 +119,14 @@
*/
/* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.0.2"
+#define PNG_LIBPNG_VER_STRING "1.0.2a"
/* Careful here. At one time, Guy wanted to use 082, but that would be octal.
* We must not include leading zeros.
* Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only
* version 1.0.0 was mis-numbered 100 instead of 10000). From
* version 1.0.1 it's xxyyzz, where x=major, y=minor, z=bugfix */
-#define PNG_LIBPNG_VER 10002 /* 1.0.2 */
+#define PNG_LIBPNG_VER 10003 /* 1.0.3 */
/* variables declared in png.c - only it needs to define PNG_NO_EXTERN */
#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN)
@@ -144,6 +146,7 @@
extern int FARDATA png_pass_width[7];
extern int FARDATA png_pass_height[7];
*/
+
#endif /* PNG_NO_EXTERN */
/* Three color definitions. The order of the red, green, and blue, (and the
@@ -453,7 +456,7 @@
#define PNG_sRGB_INTENT_ABSOLUTE 2
#define PNG_sRGB_INTENT_RELATIVE 3
#define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */
-
+
/* These determine if an ancillary chunk's data has been successfully read
@@ -689,6 +692,12 @@
png_malloc_ptr malloc_fn; /* function for allocating memory */
png_free_ptr free_fn; /* function for freeing memory */
#endif /* PNG_USER_MEM_SUPPORTED */
+#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
+ png_byte rgb_to_gray_status;
+ png_byte rgb_to_gray_red_coeff;
+ png_byte rgb_to_gray_green_coeff;
+ png_byte rgb_to_gray_blue_coeff;
+#endif
};
typedef png_struct FAR * FAR * png_structpp;
@@ -734,7 +743,7 @@
png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
png_malloc_ptr malloc_fn, png_free_ptr free_fn));
extern PNG_EXPORT(png_structp,png_create_write_struct_2)
- PNGARG((png_const_charp user_png_ver, png_voidp error_ptr,
+ PNGARG((png_const_charp user_png_ver, png_voidp error_ptr,
png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
png_malloc_ptr malloc_fn, png_free_ptr free_fn));
#endif
@@ -800,8 +809,11 @@
#endif /* PNG_READ_GRAY_TO_RGB_SUPPORTED */
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
-/* Reduce RGB to grayscale. (Not yet implemented) */
-extern PNG_EXPORT(void,png_set_rgb_to_gray) PNGARG((png_structp png_ptr));
+/* Reduce RGB to grayscale. */
+extern PNG_EXPORT(void,png_set_rgb_to_gray) PNGARG((png_structp png_ptr,
+ int error_action, float red, float green ));
+extern PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((png_structp
+ png_ptr));
#endif /* PNG_READ_RGB_TO_GRAY_SUPPORTED */
extern PNG_EXPORT(void,png_build_grayscale_palette) PNGARG((int bit_depth,
@@ -1105,6 +1117,7 @@
* method of error handling. If error_fn or warning_fn is NULL, the
* default function will be used.
*/
+
extern PNG_EXPORT(void,png_set_error_fn) PNGARG((png_structp png_ptr,
png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn));
@@ -1343,7 +1356,7 @@
png_infop info_ptr, png_uint_32 *width, png_uint_32 *height,
int *bit_depth, int *color_type, int *interlace_type,
int *compression_type, int *filter_type));
-
+
extern PNG_EXPORT(void,png_set_IHDR) PNGARG((png_structp png_ptr,
png_infop info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth,
int color_type, int interlace_type, int compression_type, int filter_type));
@@ -1449,28 +1462,42 @@
* only been added since version 0.95 so it is not implemented throughout
* libpng yet, but more support will be added as needed.
*/
+#ifdef PNG_DEBUG
#if (PNG_DEBUG > 0)
-#ifdef PNG_NO_STDIO
-#include <stdio.h>
-#endif
#ifndef PNG_DEBUG_FILE
#define PNG_DEBUG_FILE stderr
#endif /* PNG_DEBUG_FILE */
#define png_debug(l,m) if (PNG_DEBUG > l) \
fprintf(PNG_DEBUG_FILE,"%s"m,(l==1 ? "\t" : \
- (l==2 ? "\t\t":(l==3 ? "\t\t\t":""))))
+ (l==2 ? "\t\t":(l>2 ? "\t\t\t":""))))
#define png_debug1(l,m,p1) if (PNG_DEBUG > l) \
fprintf(PNG_DEBUG_FILE,"%s"m,(l==1 ? "\t" : \
- (l==2 ? "\t\t":(l==3 ? "\t\t\t":""))),p1)
+ (l==2 ? "\t\t":(l>2 ? "\t\t\t":""))),p1)
#define png_debug2(l,m,p1,p2) if (PNG_DEBUG > l) \
fprintf(PNG_DEBUG_FILE,"%s"m,(l==1 ? "\t" : \
- (l==2 ? "\t\t":(l==3 ? "\t\t\t":""))),p1,p2)
-#else
-#define png_debug(l, m)
-#define png_debug1(l, m, p1)
-#define png_debug2(l, m, p1, p2)
+ (l==2 ? "\t\t":(l>2 ? "\t\t\t":""))),p1,p2)
#endif /* (PNG_DEBUG > 0) */
+#endif /* PNG_DEBUG */
+#ifndef png_debug
+#define png_debug(l, m)
+#endif
+#ifndef png_debug1
+#define png_debug1(l, m, p1)
+#endif
+#ifndef png_debug2
+#define png_debug2(l, m, p1, p2)
+#endif
+
+extern PNG_EXPORT(png_charp,png_get_copyright) PNGARG((png_structp png_ptr));
+#ifdef PNG_NO_EXTERN
+extern PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp png_ptr));
+png_charp
+png_get_header_version(png_structp png_ptr)
+{
+ return("\n libpng version 1.0.2a - December 29, 1998 (header)\n");
+}
+#endif
#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
/* With these routines we avoid an integer divide, which will be slower on
@@ -1485,28 +1512,30 @@
* [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ]
*/
- /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */
-# define png_composite(composite, fg, alpha, bg) \
- { png_uint_16 temp = ((png_uint_16)(fg) * (png_uint_16)(alpha) + \
- (png_uint_16)(bg)*(png_uint_16)(255 - \
- (png_uint_16)(alpha)) + (png_uint_16)128); \
+ /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */
+
+# define png_composite(composite, fg, alpha, bg) \
+ { png_uint_16 temp = ((png_uint_16)(fg) * (png_uint_16)(alpha) + \
+ (png_uint_16)(bg)*(png_uint_16)(255 - \
+ (png_uint_16)(alpha)) + (png_uint_16)128); \
(composite) = (png_byte)((temp + (temp >> 8)) >> 8); }
-# define png_composite_16(composite, fg, alpha, bg) \
- { png_uint_32 temp = ((png_uint_32)(fg) * (png_uint_32)(alpha) + \
- (png_uint_32)(bg)*(png_uint_32)(65535L - \
- (png_uint_32)(alpha)) + (png_uint_32)32768L); \
+
+# define png_composite_16(composite, fg, alpha, bg) \
+ { png_uint_32 temp = ((png_uint_32)(fg) * (png_uint_32)(alpha) + \
+ (png_uint_32)(bg)*(png_uint_32)(65535L - \
+ (png_uint_32)(alpha)) + (png_uint_32)32768L); \
(composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); }
#else /* standard method using integer division */
- /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */
-# define png_composite(composite, fg, alpha, bg) \
- (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \
- (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
+# define png_composite(composite, fg, alpha, bg) \
+ (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \
+ (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
(png_uint_16)127) / 255)
-# define png_composite_16(composite, fg, alpha, bg) \
+
+# define png_composite_16(composite, fg, alpha, bg) \
(composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \
- (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \
+ (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \
(png_uint_32)32767) / (png_uint_32)65535L)
#endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */
@@ -1552,7 +1581,7 @@
#define PNG_DITHER 0x0040
#define PNG_BACKGROUND 0x0080
#define PNG_BACKGROUND_EXPAND 0x0100
-#define PNG_RGB_TO_GRAY 0x0200 /* Not currently implemented */
+ /* 0x0200 unused */
#define PNG_16_TO_8 0x0400
#define PNG_RGBA 0x0800
#define PNG_EXPAND 0x1000
@@ -1564,6 +1593,9 @@
#define PNG_STRIP_ALPHA 0x40000L
#define PNG_INVERT_ALPHA 0x80000L
#define PNG_USER_TRANSFORM 0x100000L
+#define PNG_RGB_TO_GRAY_ERR 0x200000L
+#define PNG_RGB_TO_GRAY_WARN 0x400000L
+#define PNG_RGB_TO_GRAY 0x600000L /* two bits, RGB_TO_GRAY_ERR|WARN */
/* flags for png_create_struct */
#define PNG_STRUCT_PNG 0x0001
@@ -1725,8 +1757,8 @@
#endif
/* Place a 32-bit number into a buffer in PNG byte order (big-endian).
- * The only currently known PNG chunk that uses signed numbers is
- * the ancillary extension chunk, pCAL.
+ * The only currently known PNG chunks that use signed numbers are
+ * the ancillary extension chunks, oFFs and pCAL.
*/
PNG_EXTERN void png_save_uint_32 PNGARG((png_bytep buf, png_uint_32 i));
@@ -1922,8 +1954,8 @@
#endif
#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
-PNG_EXTERN void png_do_rgb_to_gray PNGARG((png_row_infop row_info,
- png_bytep row));
+PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, png_row_infop
+ row_info, png_bytep row));
#endif
#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
@@ -2128,11 +2160,16 @@
#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
+#endif
+
+
#endif /* PNG_INTERNAL */
#ifdef __cplusplus
}
#endif
+#ifdef PNG_NO_EXTERN
+
/* do not put anything past this line */
#endif /* _PNG_H */
