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
27 #include "mwindow.inc"
29 #include "videodevice.inc"
30 #include "mainerror.h"
35 FilePNG::FilePNG(Asset *asset, File *file)
36 : FileList(asset, file, "PNGLIST", ".png", FILE_PNG, FILE_PNG_LIST)
46 int FilePNG::check_sig(Asset *asset)
48 FILE *stream = fopen(asset->path, "rb");
53 //printf("FilePNG::check_sig 1\n");
55 (void)fread(test, 16, 1, stream);
58 // if(png_sig_cmp((unsigned char*)test, 0, 8))
59 if(png_check_sig((unsigned char*)test, 8))
61 //printf("FilePNG::check_sig 1\n");
65 if(test[0] == 'P' && test[1] == 'N' && test[2] == 'G' &&
66 test[3] == 'L' && test[4] == 'I' && test[5] == 'S' && test[6] == 'T')
68 //printf("FilePNG::check_sig 1\n");
77 void FilePNG::get_parameters(BC_WindowBase *parent_window,
79 BC_WindowBase* &format_window,
85 PNGConfigVideo *window = new PNGConfigVideo(parent_window, asset);
86 format_window = window;
87 window->create_objects();
96 int FilePNG::can_copy_from(Asset *asset, int64_t position)
98 if(asset->format == FILE_PNG ||
99 asset->format == FILE_PNG_LIST)
106 int FilePNG::colormodel_supported(int colormodel)
108 if (((colormodel == BC_RGBA8888) && (native_cmodel == BC_RGBA16161616))
109 || ((colormodel == BC_RGB161616) && (native_cmodel == BC_RGBA16161616))
110 || (colormodel == BC_RGB888))
114 else if ((colormodel == BC_RGB161616) && (native_cmodel == BC_RGBA8888))
120 return native_cmodel;
125 int FilePNG::get_best_colormodel(Asset *asset, int driver)
127 if(asset->png_use_alpha)
136 int FilePNG::read_frame_header(char *path)
145 if(!(stream = fopen(path, "rb")))
147 eprintf("Error while opening \"%s\" for reading. \n%m\n", asset->path);
153 png_infop end_info = 0;
154 png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
155 info_ptr = png_create_info_struct(png_ptr);
156 png_init_io(png_ptr, stream);
159 png_read_info(png_ptr, info_ptr);
161 asset->width = png_get_image_width(png_ptr, info_ptr);
162 asset->height = png_get_image_height(png_ptr, info_ptr);
163 color_type = png_get_color_type(png_ptr, info_ptr);
164 color_depth = png_get_bit_depth(png_ptr,info_ptr);
166 png_get_tRNS(png_ptr, info_ptr, NULL, &num_trans, NULL);
168 if (color_depth == 16)
170 if (color_type & PNG_COLOR_MASK_ALPHA)
172 native_cmodel = BC_RGBA16161616;
176 native_cmodel = BC_RGB161616;
180 if ((color_type & PNG_COLOR_MASK_ALPHA)
183 native_cmodel = BC_RGBA8888;
187 native_cmodel = BC_RGB888;
191 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
202 static void read_function(png_structp png_ptr,
206 VFrame *input = (VFrame*)png_get_io_ptr(png_ptr);
208 memcpy(data, input->get_data() + input->get_compressed_size(), length);
209 input->set_compressed_size(input->get_compressed_size() + length);
212 static void write_function(png_structp png_ptr, png_bytep data, png_uint_32 length)
214 VFrame *output = (VFrame*)png_get_io_ptr(png_ptr);
215 long total_length = output->get_compressed_size() + length;
216 if(output->get_compressed_allocated() < total_length) {
217 long new_length = 2 * (output->get_compressed_allocated() + length);
218 output->allocate_compressed_data(new_length);
220 memcpy(output->get_data() + output->get_compressed_size(), data, length);
221 output->set_compressed_size(total_length);
224 static void flush_function(png_structp png_ptr)
229 int FilePNG::write_frame(VFrame *frame, VFrame *data, FrameWriterUnit *unit)
231 PNGUnit *png_unit = (PNGUnit*)unit;
232 png_structp png_ptr = 0;
233 png_infop info_ptr = 0;
234 VFrame *output_frame;
236 data->set_compressed_size(0);
237 //printf("FilePNG::write_frame 1\n");
238 native_cmodel = asset->png_use_alpha ? BC_RGBA8888 : BC_RGB888;
239 if(frame->get_color_model() != native_cmodel)
241 if(!png_unit->temp_frame) png_unit->temp_frame = new VFrame(0,
242 -1, asset->width, asset->height, native_cmodel, -1);
244 png_unit->temp_frame->transfer_from(frame);
245 output_frame = png_unit->temp_frame;
248 output_frame = frame;
250 //printf("FilePNG::write_frame 1\n");
251 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
252 if( png_ptr && !setjmp(png_jmpbuf(png_ptr)) ) {
253 info_ptr = png_create_info_struct(png_ptr);
254 png_set_write_fn(png_ptr, data,
255 (png_rw_ptr)write_function, (png_flush_ptr)flush_function);
256 png_set_compression_level(png_ptr, 5);
258 png_set_IHDR(png_ptr, info_ptr, asset->width, asset->height, 8,
259 asset->png_use_alpha ? PNG_COLOR_TYPE_RGB_ALPHA : PNG_COLOR_TYPE_RGB,
260 PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
261 png_write_info(png_ptr, info_ptr);
262 png_write_image(png_ptr, output_frame->get_rows());
263 png_write_end(png_ptr, info_ptr);
264 png_destroy_write_struct(&png_ptr, &info_ptr);
268 char error[256]; png_error(png_ptr, error);
269 fprintf(stderr, "FilePNG::write_frame failed: %s\n", error);
272 png_destroy_write_struct(&png_ptr, &info_ptr);
273 //printf("FilePNG::write_frame 3 %d\n", data->get_compressed_size());
277 int FilePNG::read_frame(VFrame *output, VFrame *input)
281 png_infop end_info = 0;
286 int size = input->get_compressed_size();
287 input->set_compressed_size(0);
290 //printf("FilePNG::read_frame 1 %d %d\n", native_cmodel, output->get_color_model());
291 png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
292 info_ptr = png_create_info_struct(png_ptr);
293 png_set_read_fn(png_ptr, input, (png_rw_ptr)read_function);
294 png_read_info(png_ptr, info_ptr);
296 int png_color_type = png_get_color_type(png_ptr, info_ptr);
297 if (png_color_type == PNG_COLOR_TYPE_GRAY ||
298 png_color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
300 png_set_gray_to_rgb(png_ptr);
303 colormodel = output->get_color_model();
304 color_type = png_get_color_type(png_ptr, info_ptr);
305 color_depth = png_get_bit_depth(png_ptr,info_ptr);
307 if (((native_cmodel == BC_RGBA16161616)||(native_cmodel == BC_RGB161616))
308 && ((colormodel == BC_RGBA8888)||(colormodel == BC_RGB888)))
310 png_set_strip_16(png_ptr);
313 /* If we're dropping the alpha channel, use the background color of the image
314 otherwise, use black */
315 if (((native_cmodel == BC_RGBA16161616)||(native_cmodel == BC_RGBA8888))
316 && ((colormodel == BC_RGB161616)||(colormodel == BC_RGB888)))
318 png_color_16 my_background;
319 png_color_16p image_background;
321 memset(&my_background,0,sizeof(png_color_16));
323 if (png_get_bKGD(png_ptr, info_ptr, &image_background))
325 png_set_background(png_ptr, image_background, PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
329 png_set_background(png_ptr, &my_background, PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
334 if ((color_depth == 16)
335 &&((colormodel == BC_RGBA16161616)||(colormodel == BC_RGB161616)))
337 png_set_swap(png_ptr);
340 if (!(color_type & PNG_COLOR_MASK_COLOR))
342 png_set_gray_to_rgb(png_ptr);
345 if (color_type & PNG_COLOR_MASK_PALETTE)
347 png_set_palette_to_rgb(png_ptr);
350 if (color_depth <= 8)
352 png_set_expand(png_ptr);
356 png_read_image(png_ptr, output->get_rows());
357 //printf("FilePNG::read_frame 3\n");
358 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
360 input->set_compressed_size(size);
362 //printf("FilePNG::read_frame 4\n");
366 FrameWriterUnit* FilePNG::new_writer_unit(FrameWriter *writer)
368 return new PNGUnit(this, writer);
382 PNGUnit::PNGUnit(FilePNG *file, FrameWriter *writer)
383 : FrameWriterUnit(writer)
390 if(temp_frame) delete temp_frame;
401 PNGConfigVideo::PNGConfigVideo(BC_WindowBase *parent_window, Asset *asset)
402 : BC_Window(PROGRAM_NAME ": Video Compression",
403 parent_window->get_abs_cursor_x(1),
404 parent_window->get_abs_cursor_y(1),
408 this->parent_window = parent_window;
412 PNGConfigVideo::~PNGConfigVideo()
416 void PNGConfigVideo::create_objects()
418 lock_window("PNGConfigVideo::create_objects()");
420 add_subwindow(new PNGUseAlpha(this, x, y));
421 add_subwindow(new BC_OKButton(this));
426 int PNGConfigVideo::close_event()
433 PNGUseAlpha::PNGUseAlpha(PNGConfigVideo *gui, int x, int y)
434 : BC_CheckBox(x, y, gui->asset->png_use_alpha, _("Use alpha"))
439 int PNGUseAlpha::handle_event()
441 gui->asset->png_use_alpha = get_value();