// static wxGifReaderIter* iter;
wxPalette *wxCopyPalette(const wxPalette *cmap);
-wxPNGReader::wxPNGReader(void)
+wxPNGReader::wxPNGReader()
{
filetype = 0;
RawImage = NULL; // Image data
Palette = NULL;
}
-wxBitmap* wxPNGReader::GetBitmap(void)
+wxBitmap* wxPNGReader::GetBitmap()
{
wxBitmap *bitmap = new wxBitmap;
if ( InstantiateBitmap(bitmap) )
return newCmap;
}
-wxMask *wxPNGReader::CreateMask(void)
+wxMask *wxPNGReader::CreateMask()
{
HBITMAP hBitmap = ::CreateBitmap(GetWidth(), GetHeight(), 1, 1, NULL);
bool wxPNGReader::ReadFile(wxChar * ImageFileName)
{
- int number_passes;
+ int number_passes;
- if (ImageFileName)
- wxStrcpy(filename, ImageFileName);
+ if (ImageFileName)
+ wxStrcpy(filename, ImageFileName);
- FILE *fp;
- png_struct *png_ptr;
- png_info *info_ptr;
- wxPNGReaderIter iter(this);
+ FILE *fp;
+ png_struct *png_ptr;
+ png_info *info_ptr;
- /* open the file */
- fp = fopen(wxConvFile.cWX2MB(filename), "rb");
- if (!fp)
- return FALSE;
+ /* open the file */
+ fp = fopen(wxConvFile.cWX2MB(filename), "rb");
+ if (!fp)
+ return FALSE;
- /* allocate the necessary structures */
- png_ptr = new (png_struct);
- if (!png_ptr)
- {
- fclose(fp);
- return FALSE;
- }
+ /* allocate the necessary structures */
+ png_ptr = new (png_struct);
+ if (!png_ptr)
+ {
+ fclose(fp);
+ return FALSE;
+ }
- info_ptr = new (png_info);
- if (!info_ptr)
- {
- fclose(fp);
- delete(png_ptr);
- return FALSE;
- }
- /* set error handling */
- if (setjmp(png_ptr->jmpbuf))
- {
- png_read_destroy(png_ptr, info_ptr, (png_info *)0);
- fclose(fp);
- delete(png_ptr);
- delete(info_ptr);
+ info_ptr = new (png_info);
+ if (!info_ptr)
+ {
+ fclose(fp);
+ delete(png_ptr);
+ return FALSE;
+ }
+ /* set error handling */
+ if (setjmp(png_ptr->jmpbuf))
+ {
+ png_read_destroy(png_ptr, info_ptr, (png_info *)0);
+ fclose(fp);
+ delete(png_ptr);
+ delete(info_ptr);
- /* If we get here, we had a problem reading the file */
- return FALSE;
- }
- //png_set_error(ima_png_error, NULL);
+ /* If we get here, we had a problem reading the file */
+ return FALSE;
+ }
+ //png_set_error(ima_png_error, NULL);
- /* initialize the structures, info first for error handling */
- png_info_init(info_ptr);
- png_read_init(png_ptr);
+ /* initialize the structures, info first for error handling */
+ png_info_init(info_ptr);
+ png_read_init(png_ptr);
- /* set up the input control */
- png_init_io(png_ptr, fp);
+ /* set up the input control */
+ png_init_io(png_ptr, fp);
- /* read the file information */
- png_read_info(png_ptr, info_ptr);
+ /* read the file information */
+ png_read_info(png_ptr, info_ptr);
- /* allocate the memory to hold the image using the fields
- of png_info. */
- png_color_16 my_background={ 0, 31, 127, 255, 0 };
+ /* allocate the memory to hold the image using the fields
+ of png_info. */
+ png_color_16 my_background={ 0, 31, 127, 255, 0 };
- if (info_ptr->valid & PNG_INFO_bKGD)
+ if (info_ptr->valid & PNG_INFO_bKGD)
{
- png_set_background(png_ptr, &(info_ptr->background),
- PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
+ png_set_background(png_ptr, &(info_ptr->background),
+ PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
if ( info_ptr->num_palette > 0 )
bgindex = info_ptr->background.index;
}
- else {
- png_set_background(png_ptr, &my_background,
- PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
+ else {
+ png_set_background(png_ptr, &my_background,
+ PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
// Added by JACS: guesswork!
if ( info_ptr->num_trans != 0 )
bgindex = info_ptr->num_trans - 1 ;
- }
+ }
- /* tell libpng to strip 16 bit depth files down to 8 bits */
- if (info_ptr->bit_depth == 16)
- png_set_strip_16(png_ptr);
+ /* tell libpng to strip 16 bit depth files down to 8 bits */
+ if (info_ptr->bit_depth == 16)
+ png_set_strip_16(png_ptr);
- int pixel_depth=(info_ptr->pixel_depth<24) ? info_ptr->pixel_depth: 24;
- Create(info_ptr->width, info_ptr->height, pixel_depth,
- info_ptr->color_type);
+ int pixel_depth=(info_ptr->pixel_depth<24) ? info_ptr->pixel_depth: 24;
+ Create(info_ptr->width, info_ptr->height, pixel_depth,
+ info_ptr->color_type);
- if (info_ptr->num_palette>0)
+ if (info_ptr->num_palette>0)
{
- SetPalette((int)info_ptr->num_palette, (rgb_color_struct*)info_ptr->palette);
+ SetPalette((int)info_ptr->num_palette, (rgb_color_struct*)info_ptr->palette);
}
- int row_stride = info_ptr->width * ((pixel_depth+7)>>3);
- // printf("P = %d D = %d RS= %d ", info_ptr->num_palette, info_ptr->pixel_depth,row_stride);
-// printf("CT = %d TRS = %d BD= %d ", info_ptr->color_type, info_ptr->valid & PNG_INFO_tRNS,info_ptr->bit_depth);
+ int row_stride = info_ptr->width * ((pixel_depth+7)>>3);
+ // printf("P = %d D = %d RS= %d ", info_ptr->num_palette, info_ptr->pixel_depth,row_stride);
+ // printf("CT = %d TRS = %d BD= %d ", info_ptr->color_type, info_ptr->valid & PNG_INFO_tRNS,info_ptr->bit_depth);
- byte *row_pointers = new byte[row_stride];
+ byte *row_pointers = new byte[row_stride];
- /* turn on interlace handling */
- if (info_ptr->interlace_type)
- number_passes = png_set_interlace_handling(png_ptr);
- else
- number_passes = 1;
-// printf("NP = %d ", number_passes);
+ /* turn on interlace handling */
+ if (info_ptr->interlace_type)
+ number_passes = png_set_interlace_handling(png_ptr);
+ else
+ number_passes = 1;
+ // printf("NP = %d ", number_passes);
+
+ // don't use the object to prevent warnings from VC++ about "unportable
+ // interaction between setjmp and C++ object destruction" (this is a correct
+ // warning, of course!)
+ wxPNGReaderIter *iter = new wxPNGReaderIter(this);
+ for (int pass=0; pass< number_passes; pass++)
+ {
+ iter->upset();
+ int y=0;
+ do {
+ //(unsigned char *)iter.GetRow();
+ if (info_ptr->interlace_type) {
+ if (pass>0)
+ iter->GetRow(row_pointers, row_stride);
+ png_read_row(png_ptr, row_pointers, NULL);
+ }
+ else
+ png_read_row(png_ptr, row_pointers, NULL);
- for (int pass=0; pass< number_passes; pass++) {
- iter.upset();
- int y=0;
- do {
-// (unsigned char *)iter.GetRow();
- if (info_ptr->interlace_type) {
- if (pass>0)
- iter.GetRow(row_pointers, row_stride);
- png_read_row(png_ptr, row_pointers, NULL);
+ iter->SetRow(row_pointers, row_stride);
+ y++;
+ } while(iter->PrevRow());
+ // printf("Y=%d ",y);
}
- else
- png_read_row(png_ptr, row_pointers, NULL);
- iter.SetRow(row_pointers, row_stride);
- y++;
- } while(iter.PrevRow());
-// printf("Y=%d ",y);
- }
- delete[] row_pointers;
+ delete iter;
+ delete[] row_pointers;
- /* read the rest of the file, getting any additional chunks
- in info_ptr */
- png_read_end(png_ptr, info_ptr);
+ /* read the rest of the file, getting any additional chunks
+ in info_ptr */
+ png_read_end(png_ptr, info_ptr);
- /* clean up after the read, and free any memory allocated */
- png_read_destroy(png_ptr, info_ptr, (png_info *)0);
+ /* clean up after the read, and free any memory allocated */
+ png_read_destroy(png_ptr, info_ptr, (png_info *)0);
- /* free the structures */
- delete(png_ptr);
- delete(info_ptr);
+ /* free the structures */
+ delete(png_ptr);
+ delete(info_ptr);
- /* close the file */
- fclose(fp);
+ /* close the file */
+ fclose(fp);
- /* that's it */
- return TRUE;
+ /* that's it */
+ return TRUE;
}
projects / wxWidgets.git / blobdiff