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   31 #ifndef PNGPP_GENERATOR_HPP_INCLUDED 
   32 #define PNGPP_GENERATOR_HPP_INCLUDED 
  112     template< 
typename pixel,
 
  114               class info_holder = def_image_info_holder,
 
  115               bool interlacing_supported = 
false >
 
  128         template< 
typename ostream >
 
  135 #if __BYTE_ORDER == __LITTLE_ENDIAN 
  138 #ifdef PNG_WRITE_SWAP_SUPPORTED 
  141                 throw error(
"Cannot write 16-bit image: recompile with PNG_WRITE_SWAP_SUPPORTED.");
 
  149 #ifdef PNG_WRITE_INTERLACING_SUPPORTED 
  150                 if (interlacing_supported)
 
  156                     throw std::logic_error(
"Cannot write interlaced image: generator does not support it.");
 
  159                 throw error(
"Cannot write interlaced image: interlace handling disabled.");
 
  166             pixgen* pixel_gen = 
static_cast< pixgen* 
>(
this);
 
  167             for (
size_t pass = 0; pass < pass_count; ++pass)
 
  169                 pixel_gen->reset(pass);
 
  173                     wr.
write_row(pixel_gen->get_next_row(pos));
 
  197             : 
base(width, height)
 
  204 #endif // PNGPP_GENERATOR_HPP_INCLUDED 
  
void write(ostream &stream)
Writes an image to the stream.
Definition: generator.hpp:129
Holds information about PNG image. Adapter class for IO image operations.
Definition: info.hpp:48
void write_end_info() const
Reads ending info about PNG image.
Definition: writer.hpp:128
int set_interlace_handling() const
Definition: io_base.hpp:376
void set_image_info(image_info const &info)
Definition: io_base.hpp:102
Holds information about PNG image.
Definition: image_info.hpp:48
A base class template for consumer and generator classes. Provides default reset() method implementat...
Definition: streaming_base.hpp:91
png_uint_32 uint_32
Definition: types.hpp:41
generator(image_info &info)
Constructs a generator object using passed image_info object to store image information.
Definition: generator.hpp:187
@ interlace_none
Definition: types.hpp:81
streaming_base< pixel, info_holder > base
Definition: generator.hpp:181
Exception class to represent runtime errors related to png++ operation.
Definition: error.hpp:59
Pixel generator class template.
Definition: generator.hpp:118
Pixel traits class template.
Definition: pixel_traits.hpp:48
void write_row(byte *bytes)
Writes a row of image data at a time.
Definition: writer.hpp:116
void set_swap() const
Definition: io_base.hpp:312
image_info const & get_info() const
Definition: streaming_base.hpp:107
PNG writer class template. This is the low-level writing interface–use image class or generator class...
Definition: writer.hpp:68
generator(size_t width, size_t height)
Constructs a generator object prepared to generate an image of specified width and height.
Definition: generator.hpp:196
uint_32 get_height() const
Definition: image_info.hpp:77
void write_info() const
Write info about PNG image.
Definition: writer.hpp:104