31#ifndef PNGPP_IO_BASE_HPP_INCLUDED
32#define PNGPP_IO_BASE_HPP_INCLUDED
42trace_io_transform(
char const* fmt, ...)
44#ifdef DEBUG_IO_TRANSFORM
47 fprintf(stderr,
"TRANSFORM_IO: ");
48 vfprintf(stderr, fmt, va);
52#define TRACE_IO_TRANSFORM trace_io_transform
64 io_base(io_base
const&);
65 io_base& operator=(io_base
const&);
78 assert(!
m_info.get_png_info());
122 return m_info.get_width();
132 return m_info.get_height();
137 m_info.set_height(height);
142 return m_info.get_color_type();
147 m_info.set_color_type(color_space);
152 return m_info.get_bit_depth();
157 m_info.set_bit_depth(bit_depth);
162 return m_info.get_interlace_type();
167 m_info.set_interlace_type(interlace);
172 return m_info.get_compression_type();
177 m_info.set_compression_type(compression);
182 return m_info.get_filter_type();
187 m_info.set_filter_type(filter);
194 return png_get_valid(
m_png,
199#if defined(PNG_READ_EXPAND_SUPPORTED)
202 TRACE_IO_TRANSFORM(
"png_set_expand_gray_1_2_4_to_8\n");
203 png_set_expand_gray_1_2_4_to_8(
m_png);
208 TRACE_IO_TRANSFORM(
"png_set_palette_to_rgb\n");
209 png_set_palette_to_rgb(
m_png);
214 TRACE_IO_TRANSFORM(
"png_set_tRNS_to_alpha\n");
215 png_set_tRNS_to_alpha(
m_png);
219#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
222 TRACE_IO_TRANSFORM(
"png_set_bgr\n");
227#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
230 TRACE_IO_TRANSFORM(
"png_set_gray_to_rgb\n");
231 png_set_gray_to_rgb(
m_png);
235#ifdef PNG_FLOATING_POINT_SUPPORTED
238 double red_weight = -1.0,
239 double green_weight = -1.0)
const
241 TRACE_IO_TRANSFORM(
"png_set_rgb_to_gray: error_action=%d,"
242 " red_weight=%lf, green_weight=%lf\n",
243 error_action, red_weight, green_weight);
245 png_set_rgb_to_gray(
m_png, error_action, red_weight, green_weight);
253 TRACE_IO_TRANSFORM(
"png_set_rgb_to_gray_fixed: error_action=%d,"
254 " red_weight=%d, green_weight=%d\n",
255 error_action, red_weight, green_weight);
257 png_set_rgb_to_gray_fixed(
m_png, error_action,
258 red_weight, green_weight);
265#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
268 TRACE_IO_TRANSFORM(
"png_set_strip_alpha\n");
269 png_set_strip_alpha(
m_png);
273#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) \
274 || defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
277 TRACE_IO_TRANSFORM(
"png_set_swap_alpha\n");
278 png_set_swap_alpha(
m_png);
282#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) \
283 || defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
286 TRACE_IO_TRANSFORM(
"png_set_invert_alpha\n");
287 png_set_invert_alpha(
m_png);
291#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
294 TRACE_IO_TRANSFORM(
"png_set_filler: filler=%08x, type=%d\n",
297 png_set_filler(
m_png, filler, type);
300#if !defined(PNG_1_0_X)
303 TRACE_IO_TRANSFORM(
"png_set_add_alpha: filler=%08x, type=%d\n",
306 png_set_add_alpha(
m_png, filler, type);
311#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
314 TRACE_IO_TRANSFORM(
"png_set_swap\n");
319#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
322 TRACE_IO_TRANSFORM(
"png_set_packing\n");
323 png_set_packing(
m_png);
327#if defined(PNG_READ_PACKSWAP_SUPPORTED) \
328 || defined(PNG_WRITE_PACKSWAP_SUPPORTED)
331 TRACE_IO_TRANSFORM(
"png_set_packswap\n");
332 png_set_packswap(
m_png);
336#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
337 void set_shift(
byte red_bits,
byte green_bits,
byte blue_bits,
338 byte alpha_bits = 0)
const
340 TRACE_IO_TRANSFORM(
"png_set_shift: red_bits=%d, green_bits=%d,"
341 " blue_bits=%d, alpha_bits=%d\n",
342 red_bits, green_bits, blue_bits, alpha_bits);
347 throw error(
"set_shift: expected RGB or RGBA color type");
351 bits.green = green_bits;
352 bits.blue = blue_bits;
353 bits.alpha = alpha_bits;
354 png_set_shift(
m_png, & bits);
357 void set_shift(
byte gray_bits,
byte alpha_bits = 0)
const
359 TRACE_IO_TRANSFORM(
"png_set_shift: gray_bits=%d, alpha_bits=%d\n",
360 gray_bits, alpha_bits);
365 throw error(
"set_shift: expected Gray or Gray+Alpha color type");
368 bits.gray = gray_bits;
369 bits.alpha = alpha_bits;
370 png_set_shift(
m_png, & bits);
374#if defined(PNG_READ_INTERLACING_SUPPORTED) \
375 || defined(PNG_WRITE_INTERLACING_SUPPORTED)
378 TRACE_IO_TRANSFORM(
"png_set_interlace_handling\n");
379 return png_set_interlace_handling(
m_png);
383#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
386 TRACE_IO_TRANSFORM(
"png_set_invert_mono\n");
387 png_set_invert_mono(
m_png);
391#if defined(PNG_READ_16_TO_8_SUPPORTED)
394 TRACE_IO_TRANSFORM(
"png_set_strip_16\n");
395 png_set_strip_16(
m_png);
399#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
402 TRACE_IO_TRANSFORM(
"png_set_read_user_transform_fn\n");
403 png_set_read_user_transform_fn(
m_png, transform_fn);
407#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) \
408 || defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
411 TRACE_IO_TRANSFORM(
"png_set_user_transform_info: bit_depth=%d,"
412 " channels=%d\n", bit_depth, channels);
414 png_set_user_transform_info(
m_png,
info, bit_depth, channels);
421 return png_get_io_ptr(
m_png);
449 longjmp(png_jmpbuf(
m_png), -1);
454 io_base* io =
static_cast< io_base*
>(png_get_error_ptr(
png));
Internal class to hold PNG ending info.
Definition end_info.hpp:46
Exception class to represent runtime errors related to png++ operation.
Definition error.hpp:59
Holds information about PNG image.
Definition image_info.hpp:48
Holds information about PNG image. Adapter class for IO image operations.
Definition info.hpp:48
info const & get_info() const
Definition io_base.hpp:92
std::string m_error
Definition io_base.hpp:462
void * get_io_ptr() const
Definition io_base.hpp:419
int set_interlace_handling() const
Definition io_base.hpp:376
bool has_chunk(chunk id)
Definition io_base.hpp:192
int get_bit_depth() const
Definition io_base.hpp:150
void set_interlace_type(interlace_type interlace)
Definition io_base.hpp:165
info m_info
Definition io_base.hpp:460
png_struct * m_png
Definition io_base.hpp:459
void set_filter_type(filter_type filter)
Definition io_base.hpp:185
void set_error(char const *message)
Definition io_base.hpp:424
void set_bgr() const
Definition io_base.hpp:220
info & get_info()
Definition io_base.hpp:87
void set_shift(byte gray_bits, byte alpha_bits=0) const
Definition io_base.hpp:357
static void raise_error(png_struct *png, char const *message)
Definition io_base.hpp:452
void set_shift(byte red_bits, byte green_bits, byte blue_bits, byte alpha_bits=0) const
Definition io_base.hpp:337
end_info m_end_info
Definition io_base.hpp:461
void set_color_type(color_type color_space)
Definition io_base.hpp:145
void set_swap_alpha() const
Definition io_base.hpp:275
void set_height(uint_32 height)
Definition io_base.hpp:135
void set_tRNS_to_alpha() const
Definition io_base.hpp:212
bool is_error() const
Definition io_base.hpp:442
void set_gray_to_rgb() const
Definition io_base.hpp:228
end_info & get_end_info()
Definition io_base.hpp:107
void set_palette_to_rgb() const
Definition io_base.hpp:206
io_base(png_struct *png)
Definition io_base.hpp:68
void set_packing() const
Definition io_base.hpp:320
void set_packswap() const
Definition io_base.hpp:329
void set_compression_type(compression_type compression)
Definition io_base.hpp:175
uint_32 get_height() const
Definition io_base.hpp:130
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
Definition io_base.hpp:248
void set_filler(uint_32 filler, filler_type type) const
Definition io_base.hpp:292
image_info const & get_image_info() const
Definition io_base.hpp:97
void set_invert_mono() const
Definition io_base.hpp:384
void set_image_info(image_info const &info)
Definition io_base.hpp:102
void set_strip_alpha() const
Definition io_base.hpp:266
compression_type get_compression_type() const
Definition io_base.hpp:170
void set_bit_depth(int bit_depth)
Definition io_base.hpp:155
color_type get_color_type() const
Definition io_base.hpp:140
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
void set_invert_alpha() const
Definition io_base.hpp:284
png_struct * get_png_struct() const
Definition io_base.hpp:82
void set_swap() const
Definition io_base.hpp:312
void set_user_transform_info(void *info, int bit_depth, int channels)
Definition io_base.hpp:409
~io_base()
Definition io_base.hpp:75
uint_32 get_width() const
Definition io_base.hpp:120
void set_gray_1_2_4_to_8() const
Definition io_base.hpp:200
void set_add_alpha(uint_32 filler, filler_type type) const
Definition io_base.hpp:301
filter_type get_filter_type() const
Definition io_base.hpp:180
void set_width(uint_32 width)
Definition io_base.hpp:125
void raise_error()
Definition io_base.hpp:447
void set_read_user_transform(png_user_transform_ptr transform_fn)
Definition io_base.hpp:400
interlace_type get_interlace_type() const
Definition io_base.hpp:160
void set_strip_16() const
Definition io_base.hpp:392
void reset_error()
Definition io_base.hpp:430
end_info const & get_end_info() const
Definition io_base.hpp:112
rgb_to_gray_error_action
Definition types.hpp:73
@ rgb_to_gray_silent
Definition types.hpp:74
filler_type
Definition types.hpp:67
interlace_type
Definition types.hpp:80
png_fixed_point fixed_point
Definition types.hpp:42
color_type
Definition types.hpp:47
@ color_type_gray
Definition types.hpp:49
@ color_type_rgb_alpha
Definition types.hpp:52
@ color_type_rgb
Definition types.hpp:51
@ color_type_gray_alpha
Definition types.hpp:53
png_uint_32 uint_32
Definition types.hpp:41
compression_type
Definition types.hpp:86
chunk
Definition types.hpp:99
png_color_8 color_info
Definition types.hpp:43
filter_type
Definition types.hpp:92