4 * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include "interlacemodes.h"
28 #include "mwindow.inc"
30 #include "videodevice.inc"
31 #include "mainerror.h"
36 FilePNG::FilePNG(Asset *asset, File *file)
37 : FileList(asset, file, "PNGLIST", ".png", FILE_PNG, FILE_PNG_LIST)
47 int FilePNG::check_sig(Asset *asset)
49 FILE *stream = fopen(asset->path, "rb");
54 //printf("FilePNG::check_sig 1\n");
56 (void)fread(test, 16, 1, stream);
59 // if(png_sig_cmp((unsigned char*)test, 0, 8))
60 if(png_check_sig((unsigned char*)test, 8))
62 //printf("FilePNG::check_sig 1\n");
66 if(test[0] == 'P' && test[1] == 'N' && test[2] == 'G' &&
67 test[3] == 'L' && test[4] == 'I' && test[5] == 'S' && test[6] == 'T')
69 //printf("FilePNG::check_sig 1\n");
78 void FilePNG::get_parameters(BC_WindowBase *parent_window,
80 BC_WindowBase* &format_window,
86 PNGConfigVideo *window = new PNGConfigVideo(parent_window, asset);
87 format_window = window;
88 window->create_objects();
97 int FilePNG::can_copy_from(Asset *asset, int64_t position)
99 if(asset->format == FILE_PNG ||
100 asset->format == FILE_PNG_LIST)
107 int FilePNG::colormodel_supported(int colormodel)
109 if (((colormodel == BC_RGBA8888) && (native_cmodel == BC_RGBA16161616))
110 || ((colormodel == BC_RGB161616) && (native_cmodel == BC_RGBA16161616))
111 || (colormodel == BC_RGB888))
115 else if ((colormodel == BC_RGB161616) && (native_cmodel == BC_RGBA8888))
121 return native_cmodel;
126 int FilePNG::get_best_colormodel(Asset *asset, int driver)
128 if(asset->png_use_alpha)
137 int FilePNG::read_frame_header(char *path)
146 if(!(stream = fopen(path, "rb")))
148 eprintf("Error while opening \"%s\" for reading. \n%m\n", asset->path);
154 png_infop end_info = 0;
155 png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
156 info_ptr = png_create_info_struct(png_ptr);
157 png_init_io(png_ptr, stream);
160 png_read_info(png_ptr, info_ptr);
162 asset->width = png_get_image_width(png_ptr, info_ptr);
163 asset->height = png_get_image_height(png_ptr, info_ptr);
165 asset->interlace_mode = ILACE_MODE_NOTINTERLACED;
167 color_type = png_get_color_type(png_ptr, info_ptr);
168 color_depth = png_get_bit_depth(png_ptr,info_ptr);
170 png_get_tRNS(png_ptr, info_ptr, NULL, &num_trans, NULL);
172 if (color_depth == 16)
174 if (color_type & PNG_COLOR_MASK_ALPHA)
176 native_cmodel = BC_RGBA16161616;
180 native_cmodel = BC_RGB161616;
184 if ((color_type & PNG_COLOR_MASK_ALPHA)
187 native_cmodel = BC_RGBA8888;
191 native_cmodel = BC_RGB888;
194 asset->png_use_alpha = BC_CModels::has_alpha(native_cmodel) ? 1 : 0;
196 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
207 static void read_function(png_structp png_ptr,
211 VFrame *input = (VFrame*)png_get_io_ptr(png_ptr);
213 memcpy(data, input->get_data() + input->get_compressed_size(), length);
214 input->set_compressed_size(input->get_compressed_size() + length);
217 static void write_function(png_structp png_ptr, png_bytep data, png_uint_32 length)
219 VFrame *output = (VFrame*)png_get_io_ptr(png_ptr);
220 long total_length = output->get_compressed_size() + length;
221 if(output->get_compressed_allocated() < total_length) {
222 long new_length = 2 * (output->get_compressed_allocated() + length);
223 output->allocate_compressed_data(new_length);
225 memcpy(output->get_data() + output->get_compressed_size(), data, length);
226 output->set_compressed_size(total_length);
229 static void flush_function(png_structp png_ptr)
234 int FilePNG::write_frame(VFrame *frame, VFrame *data, FrameWriterUnit *unit)
236 PNGUnit *png_unit = (PNGUnit*)unit;
237 png_structp png_ptr = 0;
238 png_infop info_ptr = 0;
239 VFrame *output_frame;
241 data->set_compressed_size(0);
242 //printf("FilePNG::write_frame 1\n");
243 native_cmodel = asset->png_use_alpha ? BC_RGBA8888 : BC_RGB888;
244 if(frame->get_color_model() != native_cmodel)
246 if(!png_unit->temp_frame) png_unit->temp_frame = new VFrame(0,
247 -1, asset->width, asset->height, native_cmodel, -1);
249 png_unit->temp_frame->transfer_from(frame);
250 output_frame = png_unit->temp_frame;
253 output_frame = frame;
255 //printf("FilePNG::write_frame 1\n");
256 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
258 if( !setjmp(png_jmpbuf(png_ptr)) ) {
259 info_ptr = png_create_info_struct(png_ptr);
260 png_set_write_fn(png_ptr, data,
261 (png_rw_ptr)write_function, (png_flush_ptr)flush_function);
262 png_set_compression_level(png_ptr, 5);
264 png_set_IHDR(png_ptr, info_ptr, asset->width, asset->height, 8,
265 asset->png_use_alpha ? PNG_COLOR_TYPE_RGB_ALPHA : PNG_COLOR_TYPE_RGB,
266 PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
267 png_write_info(png_ptr, info_ptr);
268 png_write_image(png_ptr, output_frame->get_rows());
269 png_write_end(png_ptr, info_ptr);
272 png_destroy_write_struct(&png_ptr, &info_ptr);
275 char error[256]; png_error(png_ptr, error);
276 fprintf(stderr, "FilePNG::write_frame failed: %s\n", error);
278 //printf("FilePNG::write_frame 3 %d\n", data->get_compressed_size());
282 int FilePNG::read_frame(VFrame *output, VFrame *input)
286 png_infop end_info = 0;
291 int size = input->get_compressed_size();
292 input->set_compressed_size(0);
295 //printf("FilePNG::read_frame 1 %d %d\n", native_cmodel, output->get_color_model());
296 png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
297 info_ptr = png_create_info_struct(png_ptr);
298 png_set_read_fn(png_ptr, input, (png_rw_ptr)read_function);
299 png_read_info(png_ptr, info_ptr);
301 int png_color_type = png_get_color_type(png_ptr, info_ptr);
302 if (png_color_type == PNG_COLOR_TYPE_GRAY ||
303 png_color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
305 png_set_gray_to_rgb(png_ptr);
308 colormodel = output->get_color_model();
309 color_type = png_get_color_type(png_ptr, info_ptr);
310 color_depth = png_get_bit_depth(png_ptr,info_ptr);
312 if (((native_cmodel == BC_RGBA16161616)||(native_cmodel == BC_RGB161616))
313 && ((colormodel == BC_RGBA8888)||(colormodel == BC_RGB888)))
315 png_set_strip_16(png_ptr);
318 /* If we're dropping the alpha channel, use the background color of the image
319 otherwise, use black */
320 if (((native_cmodel == BC_RGBA16161616)||(native_cmodel == BC_RGBA8888))
321 && ((colormodel == BC_RGB161616)||(colormodel == BC_RGB888)))
323 png_color_16 my_background;
324 png_color_16p image_background;
326 memset(&my_background,0,sizeof(png_color_16));
328 if (png_get_bKGD(png_ptr, info_ptr, &image_background))
330 png_set_background(png_ptr, image_background, PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
334 png_set_background(png_ptr, &my_background, PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
339 if ((color_depth == 16)
340 &&((colormodel == BC_RGBA16161616)||(colormodel == BC_RGB161616)))
342 png_set_swap(png_ptr);
345 if (!(color_type & PNG_COLOR_MASK_COLOR))
347 png_set_gray_to_rgb(png_ptr);
350 if (color_type & PNG_COLOR_MASK_PALETTE)
352 png_set_palette_to_rgb(png_ptr);
355 if (color_depth <= 8)
357 png_set_expand(png_ptr);
361 png_read_image(png_ptr, output->get_rows());
362 //printf("FilePNG::read_frame 3\n");
363 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
365 input->set_compressed_size(size);
367 //printf("FilePNG::read_frame 4\n");
371 FrameWriterUnit* FilePNG::new_writer_unit(FrameWriter *writer)
373 return new PNGUnit(this, writer);
387 PNGUnit::PNGUnit(FilePNG *file, FrameWriter *writer)
388 : FrameWriterUnit(writer)
395 if(temp_frame) delete temp_frame;
406 PNGConfigVideo::PNGConfigVideo(BC_WindowBase *parent_window, Asset *asset)
407 : BC_Window(_(PROGRAM_NAME ": Video Compression"),
408 parent_window->get_abs_cursor_x(1),
409 parent_window->get_abs_cursor_y(1),
413 this->parent_window = parent_window;
417 PNGConfigVideo::~PNGConfigVideo()
421 void PNGConfigVideo::create_objects()
423 lock_window("PNGConfigVideo::create_objects()");
425 add_subwindow(new PNGUseAlpha(this, x, y));
426 add_subwindow(new BC_OKButton(this));
431 int PNGConfigVideo::close_event()
438 PNGUseAlpha::PNGUseAlpha(PNGConfigVideo *gui, int x, int y)
439 : BC_CheckBox(x, y, gui->asset->png_use_alpha, _("Use alpha"))
444 int PNGUseAlpha::handle_event()
446 gui->asset->png_use_alpha = get_value();