31 #ifndef PNGPP_CONVERT_COLOR_SPACE_HPP_INCLUDED    32 #define PNGPP_CONVERT_COLOR_SPACE_HPP_INCLUDED    53         template< 
typename pixel >
    60             template< 
class reader >
    77 #ifdef DEBUG_EXPAND_8_16    78                 printf(
"row: width=%d, bytes=%d, channels=%d\n",
    79                        row_info->width, row_info->rowbytes, row_info->channels);
    83                 for (
uint_32 i = row_info->rowbytes; i-- > 0; )
    85                     row[2*i + 1] = row[i];
    88 #ifdef DEBUG_EXPAND_8_16    94 #ifdef DEBUG_EXPAND_8_16    98                 for (
uint_32 i = 0; i < width; ++i)
   100                     printf(
" %02x,", row[i]);
   106             template< 
class reader >
   109                 if (io.
get_bit_depth() == 16 && traits::get_bit_depth() == 8)
   111 #ifdef PNG_READ_16_TO_8_SUPPORTED   114                     throw error(
"expected 8-bit data but found 16-bit; recompile with PNG_READ_16_TO_8_SUPPORTED");
   117                 if (io.
get_bit_depth() != 16 && traits::get_bit_depth() == 16)
   119 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED   122                                                traits::get_channels());
   124                     throw error(
"expected 16-bit data but found 8-bit; recompile with PNG_READ_USER_TRANSFORM_SUPPORTED");
   129             template< 
class reader >
   135                 if ((src_alpha || src_tRNS) && !dst_alpha)
   137 #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED   140                     throw error(
"alpha channel unexpected; recompile with PNG_READ_STRIP_ALPHA_SUPPORTED");
   143                 if (!src_alpha && dst_alpha)
   145 #if defined(PNG_tRNS_SUPPORTED) && defined(PNG_READ_EXPAND_SUPPORTED)   152 #if defined(PNG_READ_FILLER_SUPPORTED) && !defined(PNG_1_0_X)   155                     throw error(
"expected alpha channel but none found; recompile with PNG_READ_FILLER_SUPPORTED and be sure to use libpng > 1.0.x");
   160             template< 
class reader >
   167                 if (src_palette && !dst_palette)
   169 #ifdef PNG_READ_EXPAND_SUPPORTED   173                     throw error(
"indexed colors unexpected; recompile with PNG_READ_EXPAND_SUPPORTED");
   176                 else if (!src_palette && dst_palette)
   178                     throw error(
"conversion to indexed colors is unsupported (yet)");
   180                 else if (src_palette && dst_palette
   183                     if (traits::get_bit_depth() == 8)
   185 #ifdef PNG_READ_PACK_SUPPORTED   191                         throw error(
"cannot convert to indexed colors with bit-depth < 8");
   196             template< 
class reader >
   202                 if (src_rgb && !dst_rgb)
   204 #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED   207                     throw error(
"grayscale data expected; recompile with PNG_READ_RGB_TO_GRAY_SUPPORTED");
   210                 if (!src_rgb && dst_rgb)
   212 #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED   215                     throw error(
"expected RGB data; recompile with PNG_READ_GRAY_TO_RGB_SUPPORTED");
   220             template< 
class reader >
   228 #ifdef PNG_READ_EXPAND_SUPPORTED   231                         throw error(
"convert_color_space: expected 8-bit data; recompile with PNG_READ_EXPAND_SUPPORTED");
   255     template< 
typename pixel >
   352 #endif // PNGPP_CONVERT_COLOR_SPACE_HPP_INCLUDED static void handle_gray(reader &io)
Definition: convert_color_space.hpp:221
void set_add_alpha(uint_32 filler, filler_type type) const 
Definition: io_base.hpp:301
Basic Gray+Alpha pixel type. 
Definition: ga_pixel.hpp:46
void set_read_user_transform(png_user_transform_ptr transform_fn)
Definition: io_base.hpp:400
RGB pixel type. 
Definition: rgb_pixel.hpp:44
int get_bit_depth() const 
Definition: io_base.hpp:150
static void handle_alpha(reader &io, uint_32 filler)
Definition: convert_color_space.hpp:130
Definition: types.hpp:104
static void handle_16(reader &io)
Definition: convert_color_space.hpp:107
static void handle_palette(reader &io)
Definition: convert_color_space.hpp:161
The 8-bit Indexed (colormap) pixel type. 
Definition: index_pixel.hpp:44
The PNG reader class template. This is the low-level reading interface–use image class or consumer ...
Definition: reader.hpp:65
Pixel traits class template. 
Definition: pixel_traits.hpp:48
static void dump_row(byte const *row, uint_32 width)
Definition: convert_color_space.hpp:95
color_type get_color_type() const 
Definition: io_base.hpp:140
void set_strip_16() const 
Definition: io_base.hpp:392
IO transformation class template. Converts image color space. 
Definition: convert_color_space.hpp:54
void set_bit_depth(int bit_depth)
Definition: io_base.hpp:155
uint_16 gray_pixel_16
The 16-bit Grayscale pixel type. 
Definition: gray_pixel.hpp:49
bool has_chunk(chunk id)
Definition: io_base.hpp:192
RGBA pixel type. 
Definition: rgba_pixel.hpp:44
png_uint_32 uint_32
Definition: types.hpp:41
png_byte byte
Definition: types.hpp:39
void set_gray_to_rgb() const 
Definition: io_base.hpp:228
static component get_alpha_filler()
Returns the default alpha channel filler for full opacity. 
Definition: pixel_traits.hpp:95
void operator()(reader &io) const 
Definition: convert_color_space.hpp:61
void drop_palette()
Removes all entries from the palette. 
Definition: image_info.hpp:155
void set_color_type(color_type color_space)
Definition: io_base.hpp:145
info & get_info()
Definition: io_base.hpp:87
static void expand_8_to_16(png_struct *, png_row_info *row_info, byte *row)
Definition: convert_color_space.hpp:74
byte gray_pixel
The 8-bit Grayscale pixel type. 
Definition: gray_pixel.hpp:44
void set_packing() const 
Definition: io_base.hpp:320
static void handle_rgb(reader &io)
Definition: convert_color_space.hpp:197
pixel_traits< pixel > traits
Definition: convert_color_space.hpp:56
IO transformation class template. Converts image color space. 
Definition: convert_color_space.hpp:256
void set_palette_to_rgb() const 
Definition: io_base.hpp:206
basic_alpha_pixel_traits< component_type > alpha_traits
Definition: convert_color_space.hpp:58
void set_tRNS_to_alpha() const 
Definition: io_base.hpp:212
void set_gray_1_2_4_to_8() const 
Definition: io_base.hpp:200
void set_user_transform_info(void *info, int bit_depth, int channels)
Definition: io_base.hpp:409
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 
Definition: io_base.hpp:236
Exception class to represent runtime errors related to png++ operation. 
Definition: error.hpp:57
traits::component_type component_type
Definition: convert_color_space.hpp:57
void set_strip_alpha() const 
Definition: io_base.hpp:266
Basic pixel traits class template for pixels with alpha channel. 
Definition: pixel_traits.hpp:89