diff options
| -rw-r--r-- | LICENSE | 4 | ||||
| -rw-r--r-- | README | 2 | ||||
| -rw-r--r-- | libpng-manual.txt | 170 | ||||
| -rw-r--r-- | libpng.3 | 178 | ||||
| -rw-r--r-- | libpngpf.3 | 2 | ||||
| -rw-r--r-- | png.5 | 2 | ||||
| -rw-r--r-- | png.c | 4 | ||||
| -rw-r--r-- | pngconf.h | 2 | ||||
| -rw-r--r-- | projects/vstudio/readme.txt | 2 | ||||
| -rw-r--r-- | projects/vstudio/zlib.props | 2 | ||||
| -rw-r--r-- | scripts/README.txt | 2 | ||||
| -rw-r--r-- | scripts/pnglibconf.h.prebuilt | 2 |
12 files changed, 310 insertions, 62 deletions
@@ -10,7 +10,7 @@ this sentence. This code is released under the libpng license. -libpng versions 1.2.6, August 15, 2004, through 1.6.0beta06, January 16, 2012, are +libpng versions 1.2.6, August 15, 2004, through 1.6.0beta06, January 24, 2012, are Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are distributed according to the same disclaimer and license as libpng-1.2.5 with the following individual added to the list of Contributing Authors @@ -108,4 +108,4 @@ certification mark of the Open Source Initiative. Glenn Randers-Pehrson glennrp at users.sourceforge.net -January 16, 2012 +January 24, 2012 @@ -1,4 +1,4 @@ -README for libpng version 1.6.0beta06 - January 16, 2012 (shared library 16.0) +README for libpng version 1.6.0beta06 - January 24, 2012 (shared library 16.0) See the note about version numbers near the top of png.h See INSTALL for instructions on how to install libpng. diff --git a/libpng-manual.txt b/libpng-manual.txt index 326310b2e..f014a2684 100644 --- a/libpng-manual.txt +++ b/libpng-manual.txt @@ -1,6 +1,6 @@ libpng-manual.txt - A description on how to use and modify libpng - libpng version 1.6.0beta06 - January 16, 2012 + libpng version 1.6.0beta06 - January 24, 2012 Updated and distributed by Glenn Randers-Pehrson <glennrp at users.sourceforge.net> Copyright (c) 1998-2011 Glenn Randers-Pehrson @@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng Based on: - libpng versions 0.97, January 1998, through 1.6.0beta06 - January 16, 2012 + libpng versions 0.97, January 1998, through 1.6.0beta06 - January 24, 2012 Updated and distributed by Glenn Randers-Pehrson Copyright (c) 1998-2011 Glenn Randers-Pehrson @@ -3513,20 +3513,24 @@ need to write. The "png_image" structure contains the following members: png_uint_32 format Image format as defined below png_uint_32 flags A bit mask containing informational flags png_controlp opaque Initialize to NULL, free with png_image_free + png_const_bytep colormap A pointer to the application color-map + png_uint_32 warning_or_error; + char message[64]; -In the event of an error or warning the following field will be set to a -non-zero value and the 'message' field will contain a '\0' terminated -string with the libpng error or warning message. If both warnings and -an error were encountered, only the error is recorded. If there +In the event of an error or warning the following field wrning_or_error +field will be set to a non-zero value and the 'message' field will contain +a '\0' terminated string with the libpng error or warning message. If both +warnings and an error were encountered, only the error is recorded. If there are multiple warnings, only the first one is recorded. -As of libpng-1.6.0 the values are +The upper 30 bits of this value are reserved; the low two bits contain +a two bit code such that a value more than 1 indicates a failure in the API +just called: + 0 - no warning or error - 1 - error - 2 - warning - - png_uint_32 warning_or_error; - char message[64]; + 1 - warning + 2 - error + 3 - error preceded by warning The pixels (samples) of the image have one to four channels whose components have original values in the range 0 to 1.0: @@ -3538,7 +3542,7 @@ have original values in the range 0 to 1.0: The channels are encoded in one of two ways: - a) As a small integer, value 0..255, contained in a (png_byte). For the + a) As a small integer, value 0..255, contained in a single byte. For the alpha channel the original value is simply value/255. For the color or luminance channels the value is encoded according to the sRGB specification and matches the 8-bit format expected by typical display devices. @@ -3546,7 +3550,7 @@ and matches the 8-bit format expected by typical display devices. The color/gray channels are not scaled (pre-multiplied) by the alpha channel and are suitable for passing to color management software. - b) As a value in the range 0..65535, contained in a (png_uint_16). All + b) As a value in the range 0..65535, contained in a 2-byte integer. All channels can be converted to the original value by dividing by 65535; all channels are linear. Color channels use the RGB encoding (RGB end-points) of the sRGB specification. This encoding is identified by the @@ -3557,6 +3561,12 @@ of the color or luminance channels and is returned as an associated alpha channel: the color/gray channels are scaled (pre-multiplied) by the alpha value. +When a color-mapped image is used as a result of calling +png_image_read_colormap or png_image_write_colormap the channels are encoded +in the color-map and the descriptions above apply to the color-map entries. +The image data is encoded as small integers, value 0..255, that index the +entries in the color-map. One integer (one byte) is stored for each pixel. + PNG_FORMAT_* The #defines to be used in png_image::format. Each #define identifies a @@ -3567,6 +3577,11 @@ A format is built up using single bit flag values. Not all combinations are valid: use the bit flag values below for testing a format returned by the read APIs, but set formats from the derived values. +When reading or writing color-mapped images the format should be set to the +format of the entries in the color-map then png_image_{read,write}_colormap +called to read or write the color-map and set the format correctly for the +image data. Do not set the PNG_FORMAT_FLAG_COLORMAP bit directly! + NOTE: libpng can be built with particular features disabled, if you see compiler errors because the definition of one of the following flags has been compiled out it is because libpng does not have the required support. It is @@ -3579,8 +3594,9 @@ guard against this by checking for the definition of: PNG_FORMAT_FLAG_ALPHA 0x01 format with an alpha channel PNG_FORMAT_FLAG_COLOR 0x02 color format: otherwise grayscale PNG_FORMAT_FLAG_LINEAR 0x04 png_uint_16 channels else png_byte - PNG_FORMAT_FLAG_BGR 0x08 BGR colors, else order is RGB - PNG_FORMAT_FLAG_AFIRST 0x10 alpha channel comes first + PNG_FORMAT_FLAG_COLORMAP 0x08 libpng use only + PNG_FORMAT_FLAG_BGR 0x10 BGR colors, else order is RGB + PNG_FORMAT_FLAG_AFIRST 0x20 alpha channel comes first Supported formats are as follows. Future versions of libpng may support more formats; for compatibility with older versions simply check if the format @@ -3599,7 +3615,7 @@ First the single byte formats: PNG_FORMAT_BGRA (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_ALPHA) PNG_FORMAT_ABGR (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_AFIRST) -Then the linear (png_uint_16) formats. When naming these "Y" is used to +Then the linear 2-byte formats. When naming these "Y" is used to indicate a luminance (gray) channel. The component order within the pixel is always the same - there is no provision for swapping the order of the components in the linear format. @@ -3613,16 +3629,124 @@ components in the linear format. (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR| PNG_FORMAT_FLAG_ALPHA) +Color-mapped formats are obtained by calling png_image_{read,write}_colormap, +as appropriate after setting png_image::format to the format of the color-map +to be read or written. Applications may check the value of +PNG_FORMAT_FLAG_COLORMAP to see if they have called the colormap API. The +format of the color-map may be extracted using the following macro. + + PNG_FORMAT_OF_COLORMAP(fmt) ((fmt) & ~PNG_FORMAT_FLAG_COLORMAP) + PNG_IMAGE macros -These are convenience macros to derive information from a png_image structure: +These are convenience macros to derive information from a png_image +structure. The PNG_IMAGE_SAMPLE_ macros return values appropriate to the +actual image sample values - either the entries in the color-map or the +pixels in the image. The PNG_IMAGE_PIXEL_ macros return corresponding values +for the pixels and will always return 1 after a call to +png_image_{read,write}_colormap. The remaining macros return information +about the rows in the image and the complete image. - PNG_IMAGE_CHANNELS(fmt) +NOTE: All the macros that take a png_image::format parameter are compile time +constants if the format parameter is, itself, a constant. Therefore these +macros can be used in array declarations and case labels where required. +Similarly the macros are also pre-processor constants (sizeof is not used) so +they can be used in #if tests. + +First the information about the samples. + + PNG_IMAGE_SAMPLE_CHANNELS(fmt) Returns the total number of channels in a given format: 1..4 - PNG_IMAGE_COMPONENT_SIZE(fmt) - Returns the size in bytes of a single component of a pixel - in the image. + PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt) + Returns the size in bytes of a single component of a pixel or color-map + entry (as appropriate) in the image. + + ++ ++#define PNG_IMAGE_SAMPLE_SIZE(fmt)\ ++ (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt)) ++ /* This is the size of the sample data for one sample. If the image is ++ * color-mapped it is the size of one color-map entry (and image pixels are ++ * one byte in size), otherwise it is the size of one image pixel. ++ */ ++ ++#define PNG_IMAGE_COLORMAP_SIZE(fmt) (PNG_IMAGE_SAMPLE_SIZE(format) * 256) ++ /* The size of the color-map required by the format; this is the size of the ++ * color-map buffer passed to the png_image_{read,write}_colormap APIs, it is ++ * a fixed number determined by the format so can easily be allocated on the ++ * stack if necessary. ++ */ ++ ++/* Corresponding information about the pixels */ ++#define PNG_IMAGE_PIXEL_(test,fmt)\ ++ (((fmt)&PNG_FORMAT_FLAG_COLORMAP)?1:test(fmt)) ++ ++#define PNG_IMAGE_PIXEL_CHANNELS(fmt)\ ++ PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_CHANNELS,fmt) ++ /* The number of separate channels (components) in a pixel; 1 for a ++ * color-mapped image. ++ */ ++ ++#define PNG_IMAGE_PIXEL_COMPONENT_SIZE(fmt)\ ++ PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_COMPONENT_SIZE,fmt) ++ /* The size, in bytes, of each component in a pixel; 1 for a color-mapped ++ * image. ++ */ + +-#define PNG_IMAGE_PIXEL_SIZE(fmt)\ +- (PNG_IMAGE_CHANNELS(fmt) * PNG_IMAGE_COMPONENT_SIZE(fmt)) +- /* Return the size in bytes of a single pixel in the image. */ +- ++#define PNG_IMAGE_PIXEL_SIZE(fmt) PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_SIZE,fmt) ++ /* The size, in bytes, of a complete pixel; 1 for a color-mapped image. */ ++ ++/* Information about the whole row, or whole image */ + #define PNG_IMAGE_ROW_STRIDE(image)\ +- (PNG_IMAGE_CHANNELS((image).format) * (image).width) ++ (PNG_IMAGE_PIXEL_CHANNELS((image).format) * (image).width) + /* Return the total number of components in a single row of the image; this + * is the minimum 'row stride', the minimum count of components between each ++ * row. For a color-mapped image this is the minimum number of bytes in a + * row. + */ + + #define PNG_IMAGE_BUFFER_SIZE(image, row_stride)\ +- (PNG_IMAGE_COMPONENT_SIZE((image).format) * (image).height * (row_stride)) ++ (PNG_IMAGE_PIXEL_COMPONENT_SIZE((image).format)*(image).height*(row_stride)) + /* Return the size, in bytes, of an image buffer given a png_image and a row + * stride - the number of components to leave space for in each row. + */ +@@ -2815,17 +2903,24 @@ typedef struct + * Flags containing additional information about the image are held in the + * 'flags' field of png_image. + */ +-#define PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB 1 ++#define PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB 0x01 + /* This indicates the the RGB values of the in-memory bitmap do not + * correspond to the red, green and blue end-points defined by sRGB. + */ + ++#define PNG_IMAGE_FLAG_COLORMAP 0x02 ++ /* The PNG is color-mapped. If this flag is set png_image_read_colormap ++ * can be used without further loss of image information. If it is not set ++ * png_image_read_colormap will cause significant loss if the image has any ++ * colors (if PNG_FORMAT_FLAG_COLOR is set). ++ */ ++ + #ifdef PNG_SIMPLIFIED_READ_SUPPORTED + /* READ APIs + * --------- + * + * The png_image passed to the read APIs must have been initialized by setting +- * the png_controlp field 'opaque' to NULL (or, better, memset the whole thing.) ++ * the png_controlp field 'opaque' to NULL (or, safer, memset the whole thing.) + */ + + + + + PNG_IMAGE_PIXEL_SIZE(fmt) Returns the size in bytes of a single pixel in the image. @@ -4905,7 +5029,7 @@ Other rules can be inferred by inspecting the libpng source. XVI. Y2K Compliance in libpng -January 16, 2012 +January 24, 2012 Since the PNG Development group is an ad-hoc body, we can't make an official declaration. @@ -1,4 +1,4 @@ -.TH LIBPNG 3 "January 16, 2012" +.TH LIBPNG 3 "January 24, 2012" .SH NAME libpng \- Portable Network Graphics (PNG) Reference Library 1.6.0beta06 .SH SYNOPSIS @@ -1003,7 +1003,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng. .SH LIBPNG.TXT libpng-manual.txt - A description on how to use and modify libpng - libpng version 1.6.0beta06 - January 16, 2012 + libpng version 1.6.0beta06 - January 24, 2012 Updated and distributed by Glenn Randers-Pehrson <glennrp at users.sourceforge.net> Copyright (c) 1998-2011 Glenn Randers-Pehrson @@ -1014,7 +1014,7 @@ libpng-manual.txt - A description on how to use and modify libpng Based on: - libpng versions 0.97, January 1998, through 1.6.0beta06 - January 16, 2012 + libpng versions 0.97, January 1998, through 1.6.0beta06 - January 24, 2012 Updated and distributed by Glenn Randers-Pehrson Copyright (c) 1998-2011 Glenn Randers-Pehrson @@ -4516,20 +4516,24 @@ need to write. The "png_image" structure contains the following members: png_uint_32 format Image format as defined below png_uint_32 flags A bit mask containing informational flags png_controlp opaque Initialize to NULL, free with png_image_free + png_const_bytep colormap A pointer to the application color-map + png_uint_32 warning_or_error; + char message[64]; -In the event of an error or warning the following field will be set to a -non-zero value and the 'message' field will contain a '\0' terminated -string with the libpng error or warning message. If both warnings and -an error were encountered, only the error is recorded. If there +In the event of an error or warning the following field wrning_or_error +field will be set to a non-zero value and the 'message' field will contain +a '\0' terminated string with the libpng error or warning message. If both +warnings and an error were encountered, only the error is recorded. If there are multiple warnings, only the first one is recorded. -As of libpng-1.6.0 the values are +The upper 30 bits of this value are reserved; the low two bits contain +a two bit code such that a value more than 1 indicates a failure in the API +just called: + 0 - no warning or error - 1 - error - 2 - warning - - png_uint_32 warning_or_error; - char message[64]; + 1 - warning + 2 - error + 3 - error preceded by warning The pixels (samples) of the image have one to four channels whose components have original values in the range 0 to 1.0: @@ -4541,7 +4545,7 @@ have original values in the range 0 to 1.0: The channels are encoded in one of two ways: - a) As a small integer, value 0..255, contained in a (png_byte). For the + a) As a small integer, value 0..255, contained in a single byte. For the alpha channel the original value is simply value/255. For the color or luminance channels the value is encoded according to the sRGB specification and matches the 8-bit format expected by typical display devices. @@ -4549,7 +4553,7 @@ and matches the 8-bit format expected by typical display devices. The color/gray channels are not scaled (pre-multiplied) by the alpha channel and are suitable for passing to color management software. - b) As a value in the range 0..65535, contained in a (png_uint_16). All + b) As a value in the range 0..65535, contained in a 2-byte integer. All channels can be converted to the original value by dividing by 65535; all channels are linear. Color channels use the RGB encoding (RGB end-points) of the sRGB specification. This encoding is identified by the @@ -4560,6 +4564,12 @@ of the color or luminance channels and is returned as an associated alpha channel: the color/gray channels are scaled (pre-multiplied) by the alpha value. +When a color-mapped image is used as a result of calling +png_image_read_colormap or png_image_write_colormap the channels are encoded +in the color-map and the descriptions above apply to the color-map entries. +The image data is encoded as small integers, value 0..255, that index the +entries in the color-map. One integer (one byte) is stored for each pixel. + PNG_FORMAT_* The #defines to be used in png_image::format. Each #define identifies a @@ -4570,6 +4580,11 @@ A format is built up using single bit flag values. Not all combinations are valid: use the bit flag values below for testing a format returned by the read APIs, but set formats from the derived values. +When reading or writing color-mapped images the format should be set to the +format of the entries in the color-map then png_image_{read,write}_colormap +called to read or write the color-map and set the format correctly for the +image data. Do not set the PNG_FORMAT_FLAG_COLORMAP bit directly! + NOTE: libpng can be built with particular features disabled, if you see compiler errors because the definition of one of the following flags has been compiled out it is because libpng does not have the required support. It is @@ -4582,8 +4597,9 @@ guard against this by checking for the definition of: PNG_FORMAT_FLAG_ALPHA 0x01 format with an alpha channel PNG_FORMAT_FLAG_COLOR 0x02 color format: otherwise grayscale PNG_FORMAT_FLAG_LINEAR 0x04 png_uint_16 channels else png_byte - PNG_FORMAT_FLAG_BGR 0x08 BGR colors, else order is RGB - PNG_FORMAT_FLAG_AFIRST 0x10 alpha channel comes first + PNG_FORMAT_FLAG_COLORMAP 0x08 libpng use only + PNG_FORMAT_FLAG_BGR 0x10 BGR colors, else order is RGB + PNG_FORMAT_FLAG_AFIRST 0x20 alpha channel comes first Supported formats are as follows. Future versions of libpng may support more formats; for compatibility with older versions simply check if the format @@ -4602,7 +4618,7 @@ First the single byte formats: PNG_FORMAT_BGRA (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_ALPHA) PNG_FORMAT_ABGR (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_AFIRST) -Then the linear (png_uint_16) formats. When naming these "Y" is used to +Then the linear 2-byte formats. When naming these "Y" is used to indicate a luminance (gray) channel. The component order within the pixel is always the same - there is no provision for swapping the order of the components in the linear format. @@ -4616,16 +4632,124 @@ components in the linear format. (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR| PNG_FORMAT_FLAG_ALPHA) +Color-mapped formats are obtained by calling png_image_{read,write}_colormap, +as appropriate after setting png_image::format to the format of the color-map +to be read or written. Applications may check the value of +PNG_FORMAT_FLAG_COLORMAP to see if they have called the colormap API. The +format of the color-map may be extracted using the following macro. + + PNG_FORMAT_OF_COLORMAP(fmt) ((fmt) & ~PNG_FORMAT_FLAG_COLORMAP) + PNG_IMAGE macros -These are convenience macros to derive information from a png_image structure: +These are convenience macros to derive information from a png_image +structure. The PNG_IMAGE_SAMPLE_ macros return values appropriate to the +actual image sample values - either the entries in the color-map or the +pixels in the image. The PNG_IMAGE_PIXEL_ macros return corresponding values +for the pixels and will always return 1 after a call to +png_image_{read,write}_colormap. The remaining macros return information +about the rows in the image and the complete image. - PNG_IMAGE_CHANNELS(fmt) +NOTE: All the macros that take a png_image::format parameter are compile time +constants if the format parameter is, itself, a constant. Therefore these +macros can be used in array declarations and case labels where required. +Similarly the macros are also pre-processor constants (sizeof is not used) so +they can be used in #if tests. + +First the information about the samples. + + PNG_IMAGE_SAMPLE_CHANNELS(fmt) Returns the total number of channels in a given format: 1..4 - PNG_IMAGE_COMPONENT_SIZE(fmt) - Returns the size in bytes of a single component of a pixel - in the image. + PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt) + Returns the size in bytes of a single component of a pixel or color-map + entry (as appropriate) in the image. + + ++ ++#define PNG_IMAGE_SAMPLE_SIZE(fmt)\ ++ (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt)) ++ /* This is the size of the sample data for one sample. If the image is ++ * color-mapped it is the size of one color-map entry (and image pixels are ++ * one byte in size), otherwise it is the size of one image pixel. ++ */ ++ ++#define PNG_IMAGE_COLORMAP_SIZE(fmt) (PNG_IMAGE_SAMPLE_SIZE(format) * 256) ++ /* The size of the color-map required by the format; this is the size of the ++ * color-map buffer passed to the png_image_{read,write}_colormap APIs, it is ++ * a fixed number determined by the format so can easily be allocated on the ++ * stack if necessary. ++ */ ++ ++/* Corresponding information about the pixels */ ++#define PNG_IMAGE_PIXEL_(test,fmt)\ ++ (((fmt)&PNG_FORMAT_FLAG_COLORMAP)?1:test(fmt)) ++ ++#define PNG_IMAGE_PIXEL_CHANNELS(fmt)\ ++ PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_CHANNELS,fmt) ++ /* The number of separate channels (components) in a pixel; 1 for a ++ * color-mapped image. ++ */ ++ ++#define PNG_IMAGE_PIXEL_COMPONENT_SIZE(fmt)\ ++ PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_COMPONENT_SIZE,fmt) ++ /* The size, in bytes, of each component in a pixel; 1 for a color-mapped ++ * image. ++ */ + +-#define PNG_IMAGE_PIXEL_SIZE(fmt)\ +- (PNG_IMAGE_CHANNELS(fmt) * PNG_IMAGE_COMPONENT_SIZE(fmt)) +- /* Return the size in bytes of a single pixel in the image. */ +- ++#define PNG_IMAGE_PIXEL_SIZE(fmt) PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_SIZE,fmt) ++ /* The size, in bytes, of a complete pixel; 1 for a color-mapped image. */ ++ ++/* Information about the whole row, or whole image */ + #define PNG_IMAGE_ROW_STRIDE(image)\ +- (PNG_IMAGE_CHANNELS((image).format) * (image).width) ++ (PNG_IMAGE_PIXEL_CHANNELS((image).format) * (image).width) + /* Return the total number of components in a single row of the image; this + * is the minimum 'row stride', the minimum count of components between each ++ * row. For a color-mapped image this is the minimum number of bytes in a + * row. + */ + + #define PNG_IMAGE_BUFFER_SIZE(image, row_stride)\ +- (PNG_IMAGE_COMPONENT_SIZE((image).format) * (image).height * (row_stride)) ++ (PNG_IMAGE_PIXEL_COMPONENT_SIZE((image).format)*(image).height*(row_stride)) + /* Return the size, in bytes, of an image buffer given a png_image and a row + * stride - the number of components to leave space for in each row. + */ +@@ -2815,17 +2903,24 @@ typedef struct + * Flags containing additional information about the image are held in the + * 'flags' field of png_image. + */ +-#define PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB 1 ++#define PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB 0x01 + /* This indicates the the RGB values of the in-memory bitmap do not + * correspond to the red, green and blue end-points defined by sRGB. + */ + ++#define PNG_IMAGE_FLAG_COLORMAP 0x02 ++ /* The PNG is color-mapped. If this flag is set png_image_read_colormap ++ * can be used without further loss of image information. If it is not set ++ * png_image_read_colormap will cause significant loss if the image has any ++ * colors (if PNG_FORMAT_FLAG_COLOR is set). ++ */ ++ + #ifdef PNG_SIMPLIFIED_READ_SUPPORTED + /* READ APIs + * --------- + * + * The png_image passed to the read APIs must have been initialized by setting +- * the png_controlp field 'opaque' to NULL (or, better, memset the whole thing.) ++ * the png_controlp field 'opaque' to NULL (or, safer, memset the whole thing.) + */ + + + + + PNG_IMAGE_PIXEL_SIZE(fmt) Returns the size in bytes of a single pixel in the image. @@ -5909,7 +6033,7 @@ Other rules can be inferred by inspecting the libpng source. .SH XVI. Y2K Compliance in libpng -January 16, 2012 +January 24, 2012 Since the PNG Development group is an ad-hoc body, we can't make an official declaration. @@ -6177,7 +6301,7 @@ possible without all of you. Thanks to Frank J. T. Wojcik for helping with the documentation. -Libpng version 1.6.0beta06 - January 16, 2012: +Libpng version 1.6.0beta06 - January 24, 2012: Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc. Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net). @@ -6200,7 +6324,7 @@ this sentence. This code is released under the libpng license. -libpng versions 1.2.6, August 15, 2004, through 1.6.0beta06, January 16, 2012, are +libpng versions 1.2.6, August 15, 2004, through 1.6.0beta06, January 24, 2012, are Copyright (c) 2004,2006-2007 Glenn Randers-Pehrson, and are distributed according to the same disclaimer and license as libpng-1.2.5 with the following individual added to the list of Contributing Authors @@ -6299,7 +6423,7 @@ certification mark of the Open Source Initiative. Glenn Randers-Pehrson glennrp at users.sourceforge.net -January 16, 2012 +January 24, 2012 .\" end of man page diff --git a/libpngpf.3 b/libpngpf.3 index c815f25a8..7baab2308 100644 --- a/libpngpf.3 +++ b/libpngpf.3 @@ -1,4 +1,4 @@ -.TH LIBPNGPF 3 "January 16, 2012" +.TH LIBPNGPF 3 "January 24, 2012" .SH NAME libpng \- Portable Network Graphics (PNG) Reference Library 1.6.0beta06 (private functions) @@ -1,4 +1,4 @@ -.TH PNG 5 "January 16, 2012" +.TH PNG 5 "January 24, 2012" .SH NAME png \- Portable Network Graphics (PNG) format .SH DESCRIPTION @@ -762,13 +762,13 @@ png_get_copyright(png_const_structrp png_ptr) #else # ifdef __STDC__ return PNG_STRING_NEWLINE \ - "libpng version 1.6.0beta06 - January 16, 2012" PNG_STRING_NEWLINE \ + "libpng version 1.6.0beta06 - January 24, 2012" PNG_STRING_NEWLINE \ "Copyright (c) 1998-2012 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ PNG_STRING_NEWLINE; # else - return "libpng version 1.6.0beta06 - January 16, 2012\ + return "libpng version 1.6.0beta06 - January 24, 2012\ Copyright (c) 1998-2012 Glenn Randers-Pehrson\ Copyright (c) 1996-1997 Andreas Dilger\ Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc."; @@ -1,7 +1,7 @@ /* pngconf.h - machine configurable file for libpng * - * libpng version 1.6.0beta06 - January 16, 2012 + * libpng version 1.6.0beta06 - January 24, 2012 * * Copyright (c) 1998-2012 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) diff --git a/projects/vstudio/readme.txt b/projects/vstudio/readme.txt index 147506be5..5e1a26ee0 100644 --- a/projects/vstudio/readme.txt +++ b/projects/vstudio/readme.txt @@ -1,7 +1,7 @@ VisualStudio instructions -libpng version 1.6.0beta06 - January 16, 2012 +libpng version 1.6.0beta06 - January 24, 2012 Copyright (c) 1998-2010 Glenn Randers-Pehrson diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props index a85f751d3..9ef159701 100644 --- a/projects/vstudio/zlib.props +++ b/projects/vstudio/zlib.props @@ -2,7 +2,7 @@ <!-- * zlib.props - location of zlib source * - * libpng version 1.6.0beta06 - January 16, 2012 + * libpng version 1.6.0beta06 - January 24, 2012 * * Copyright (c) 1998-2011 Glenn Randers-Pehrson * diff --git a/scripts/README.txt b/scripts/README.txt index c0fa14356..2eb5b174e 100644 --- a/scripts/README.txt +++ b/scripts/README.txt @@ -1,5 +1,5 @@ -Makefiles for libpng version 1.6.0beta06 - January 16, 2012 +Makefiles for libpng version 1.6.0beta06 - January 24, 2012 pnglibconf.h.prebuilt => Stores configuration settings makefile.linux => Linux/ELF makefile diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt index 899eb4806..fb87f86e9 100644 --- a/scripts/pnglibconf.h.prebuilt +++ b/scripts/pnglibconf.h.prebuilt @@ -3,7 +3,7 @@ /* pnglibconf.h - library build configuration */ -/* Libpng 1.6.0beta06 - January 16, 2012 */ +/* Libpng 1.6.0beta06 - January 24, 2012 */ /* Copyright (c) 1998-2012 Glenn Randers-Pehrson */ |