31#ifndef PNGPP_INFO_HPP_INCLUDED 
   32#define PNGPP_INFO_HPP_INCLUDED 
   73                png_color* colors = 0;
 
   79#ifdef PNG_tRNS_SUPPORTED 
   86                    if (png_get_tRNS(
m_png, 
m_info, & values, & count, NULL)
 
   89                        throw error(
"png_get_tRNS() failed");
 
   91                    m_tRNS.assign(values, values + count);
 
   96#ifdef PNG_gAMA_SUPPORTED 
   99#ifdef PNG_FLOATING_POINT_SUPPORTED 
  102                    throw error(
"png_get_gAMA() failed");
 
  105                png_fixed_point gamma = 0;
 
  106                if (png_get_gAMA_fixed(
m_png, 
m_info, &gamma) != PNG_INFO_gAMA)
 
  108                    throw error(
"png_get_gAMA_fixed() failed");
 
 
  132#ifdef PNG_tRNS_SUPPORTED 
  134                                 const_cast< byte* 
>(& 
m_tRNS[0]),
 
  138                    throw error(
"attempted to write tRNS chunk; recompile with PNG_tRNS_SUPPORTED");
 
  145#ifdef PNG_gAMA_SUPPORTED 
  146#ifdef PNG_FLOATING_POINT_SUPPORTED 
  150                                   (png_fixed_point)(
m_gamma * 100000));
 
  153                throw error(
"attempted to write gAMA chunk; recompile with PNG_gAMA_SUPPORTED");
 
 
 
Exception class to represent runtime errors related to png++ operation.
Definition error.hpp:59
Holds information about PNG image.
Definition image_info.hpp:48
color_type m_color_type
Definition image_info.hpp:189
palette m_palette
Definition image_info.hpp:193
uint_32 m_width
Definition image_info.hpp:186
int m_bit_depth
Definition image_info.hpp:188
double m_gamma
Definition image_info.hpp:195
interlace_type m_interlace_type
Definition image_info.hpp:190
filter_type m_filter_type
Definition image_info.hpp:192
compression_type m_compression_type
Definition image_info.hpp:191
uint_32 m_height
Definition image_info.hpp:187
tRNS m_tRNS
Definition image_info.hpp:194
Internal class to hold PNG info or end_info.
Definition info_base.hpp:47
png_info * m_info
Definition info_base.hpp:72
png_struct * m_png
Definition info_base.hpp:71
Holds information about PNG image. Adapter class for IO image operations.
Definition info.hpp:48
void write() const
Definition info.hpp:116
void update()
Definition info.hpp:160
info(io_base &io, png_struct *png)
Definition info.hpp:50
void read()
Definition info.hpp:55
void sync_ihdr(void) const
Definition info.hpp:170
Base class for PNG reader/writer classes.
Definition io_base.hpp:63
@ color_type_palette
Definition types.hpp:50
@ chunk_gAMA
Definition types.hpp:100
@ chunk_PLTE
Definition types.hpp:103
@ chunk_tRNS
Definition types.hpp:104
PNG color struct extension. Adds constructors.
Definition color.hpp:44