The PNG reader class template. This is the low-level reading interface–use image class or consumer class to actually read images. More...
#include <reader.hpp>
Public Member Functions | |
| reader (istream &stream) | |
| Constructs a reader prepared to read PNG image from a stream. More... | |
| ~reader () | |
| void | read_png () |
| Reads the whole PNG data stream into memory. Not particularly useful. More... | |
| void | read_info () |
| Reads info about PNG image. More... | |
| void | read_row (byte *bytes) |
| Reads a row of image data at a time. More... | |
| void | read_end_info () |
| Reads ending info about PNG image. More... | |
| void | update_info () |
 Public Member Functions inherited from png::io_base | |
| io_base (png_struct *png) | |
| ~io_base () | |
| png_struct * | get_png_struct () const |
| info & | get_info () |
| info const & | get_info () const |
| image_info const & | get_image_info () const |
| void | set_image_info (image_info const &info) |
| end_info & | get_end_info () |
| end_info const & | get_end_info () const |
| uint_32 | get_width () const |
| void | set_width (uint_32 width) |
| uint_32 | get_height () const |
| void | set_height (uint_32 height) |
| color_type | get_color_type () const |
| void | set_color_type (color_type color_space) |
| int | get_bit_depth () const |
| void | set_bit_depth (int bit_depth) |
| interlace_type | get_interlace_type () const |
| void | set_interlace_type (interlace_type interlace) |
| compression_type | get_compression_type () const |
| void | set_compression_type (compression_type compression) |
| filter_type | get_filter_type () const |
| void | set_filter_type (filter_type filter) |
| bool | has_chunk (chunk id) |
| void | set_gray_1_2_4_to_8 () const |
| void | set_palette_to_rgb () const |
| void | set_tRNS_to_alpha () const |
| void | set_bgr () const |
| void | set_gray_to_rgb () const |
| void | set_rgb_to_gray (rgb_to_gray_error_action error_action=rgb_to_gray_silent, double red_weight=-1.0, double green_weight=-1.0) const |
| void | set_rgb_to_gray (rgb_to_gray_error_action error_action=rgb_to_gray_silent, fixed_point red_weight=-1, fixed_point green_weight=-1) const |
| void | set_strip_alpha () const |
| void | set_swap_alpha () const |
| void | set_invert_alpha () const |
| void | set_filler (uint_32 filler, filler_type type) const |
| void | set_add_alpha (uint_32 filler, filler_type type) const |
| void | set_swap () const |
| void | set_packing () const |
| void | set_packswap () const |
| void | set_shift (byte red_bits, byte green_bits, byte blue_bits, byte alpha_bits=0) const |
| void | set_shift (byte gray_bits, byte alpha_bits=0) const |
| int | set_interlace_handling () const |
| void | set_invert_mono () const |
| void | set_strip_16 () const |
| void | set_read_user_transform (png_user_transform_ptr transform_fn) |
| void | set_user_transform_info (void *info, int bit_depth, int channels) |
Additional Inherited Members | |
| Protected Member Functions inherited from png::io_base | |
| void * | get_io_ptr () const |
| void | set_error (char const *message) |
| void | reset_error () |
| bool | is_error () const |
| void | raise_error () |
| Static Protected Member Functions inherited from png::io_base | |
| static void | raise_error (png_struct *png, char const *message) |
| Protected Attributes inherited from png::io_base | |
| png_struct * | m_png |
| info | m_info |
| end_info | m_end_info |
| std::string | m_error |
Detailed Description
template<class istream>
class png::reader< istream >
The PNG reader class template. This is the low-level reading interface–use image class or consumer class to actually read images.
The istream template parameter specifies the type of input stream to work with. The istream class should implement the minimum of the following interface:
With the semantics similar to the std::istream. Naturally, std::istream fits this requirement and can be used with the reader class as is.
Constructor & Destructor Documentation
◆ reader()
|
inlineexplicit |
Constructs a reader prepared to read PNG image from a stream.
References png::io_base::m_png.
◆ ~reader()
|
inline |
Member Function Documentation
◆ read_png()
|
inline |
Reads the whole PNG data stream into memory. Not particularly useful.
References png::info_base::get_png_info(), png::io_base::m_error, png::io_base::m_info, and png::io_base::m_png.
◆ read_info()
|
inline |
Reads info about PNG image.
References png::io_base::m_error, png::io_base::m_info, png::io_base::m_png, and png::info::read().
Referenced by png::consumer< pixel, pixel_consumer, image_info_ref_holder, true >::read().
◆ read_row()
|
inline |
Reads a row of image data at a time.
References png::io_base::m_error, and png::io_base::m_png.
Referenced by png::consumer< pixel, pixel_consumer, image_info_ref_holder, true >::consumer().
◆ read_end_info()
|
inline |
Reads ending info about PNG image.
References png::io_base::m_end_info, png::io_base::m_error, png::io_base::m_png, and png::end_info::read().
Referenced by png::consumer< pixel, pixel_consumer, image_info_ref_holder, true >::read().
◆ update_info()
|
inline |
The documentation for this class was generated from the following file:
