oleaut32: Added support for decoding some PNG files.
This commit is contained in:
Evan Stade
Alexandre Julliard
parent
00302152af
commit
5c5c5aabc5
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@ -79,6 +79,11 @@
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#undef UINT16
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#endif
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#ifdef HAVE_PNG_H
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#undef FAR
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#include <png.h>
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#endif
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#include "ungif.h"
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WINE_DEFAULT_DEBUG_CHANNEL(ole);
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@ -1334,6 +1339,193 @@ static HRESULT OLEPictureImpl_LoadDIB(OLEPictureImpl *This, BYTE *xbuf, ULONG xr
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return S_OK;
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}
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/*****************************************************
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* start of PNG-specific code
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* currently only supports colortype PNG_COLOR_TYPE_RGB
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*/
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#ifdef SONAME_LIBPNG
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typedef struct{
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ULONG position;
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ULONG size;
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BYTE * buff;
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} png_io;
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static void png_stream_read_data(png_structp png_ptr, png_bytep data,
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png_size_t length)
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{
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png_io * io_ptr = png_ptr->io_ptr;
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if(length + io_ptr->position > io_ptr->size){
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length = io_ptr->size - io_ptr->position;
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}
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memcpy(data, io_ptr->buff + io_ptr->position, length);
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io_ptr->position += length;
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}
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static void *libpng_handle;
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#define MAKE_FUNCPTR(f) static typeof(f) * p##f
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MAKE_FUNCPTR(png_create_read_struct);
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MAKE_FUNCPTR(png_create_info_struct);
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MAKE_FUNCPTR(png_set_read_fn);
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MAKE_FUNCPTR(png_read_info);
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MAKE_FUNCPTR(png_read_image);
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MAKE_FUNCPTR(png_get_rowbytes);
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MAKE_FUNCPTR(png_set_bgr);
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MAKE_FUNCPTR(png_destroy_read_struct);
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MAKE_FUNCPTR(png_set_palette_to_rgb);
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MAKE_FUNCPTR(png_read_update_info);
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#undef MAKE_FUNCPTR
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static void *load_libpng(void)
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{
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if((libpng_handle = wine_dlopen(SONAME_LIBPNG, RTLD_NOW, NULL, 0)) != NULL) {
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#define LOAD_FUNCPTR(f) \
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if((p##f = wine_dlsym(libpng_handle, #f, NULL, 0)) == NULL) { \
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libpng_handle = NULL; \
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return NULL; \
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}
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LOAD_FUNCPTR(png_create_read_struct);
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LOAD_FUNCPTR(png_create_info_struct);
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LOAD_FUNCPTR(png_set_read_fn);
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LOAD_FUNCPTR(png_read_info);
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LOAD_FUNCPTR(png_read_image);
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LOAD_FUNCPTR(png_get_rowbytes);
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LOAD_FUNCPTR(png_set_bgr);
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LOAD_FUNCPTR(png_destroy_read_struct);
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LOAD_FUNCPTR(png_set_palette_to_rgb);
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LOAD_FUNCPTR(png_read_update_info);
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#undef LOAD_FUNCPTR
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}
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return libpng_handle;
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}
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#endif /* SONAME_LIBPNG */
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static HRESULT OLEPictureImpl_LoadPNG(OLEPictureImpl *This, BYTE *xbuf, ULONG xread)
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{
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#ifdef SONAME_LIBPNG
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png_io io;
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png_structp png_ptr = NULL;
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png_infop info_ptr = NULL;
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INT row, rowsize, height, width;
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png_bytep* row_pointers = NULL;
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png_bytep pngdata = NULL;
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BITMAPINFOHEADER bmi;
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HDC hdcref = NULL;
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HRESULT ret;
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BOOL set_bgr = FALSE;
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if(!libpng_handle) {
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if(!load_libpng()) {
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ERR("Failed reading PNG because unable to find %s\n",SONAME_LIBPNG);
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return E_FAIL;
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}
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}
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io.size = xread;
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io.position = 0;
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io.buff = xbuf;
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png_ptr = ppng_create_read_struct(PNG_LIBPNG_VER_STRING,
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NULL, NULL, NULL);
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if(setjmp(png_jmpbuf(png_ptr))){
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TRACE("Error in libpng\n");
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ret = E_FAIL;
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goto pngend;
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}
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info_ptr = ppng_create_info_struct(png_ptr);
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ppng_set_read_fn(png_ptr, &io, png_stream_read_data);
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ppng_read_info(png_ptr, info_ptr);
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if(!(png_ptr->color_type == PNG_COLOR_TYPE_RGB ||
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png_ptr->color_type == PNG_COLOR_TYPE_PALETTE)){
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FIXME("Unsupported .PNG type: %d\n", png_ptr->color_type);
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ret = E_FAIL;
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goto pngend;
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}
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if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE){
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ppng_set_palette_to_rgb(png_ptr);
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set_bgr = TRUE;
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}
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if (png_ptr->color_type == PNG_COLOR_TYPE_RGB ||
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png_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA ||
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set_bgr){
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ppng_set_bgr(png_ptr);
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}
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ppng_read_update_info(png_ptr, info_ptr);
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rowsize = ppng_get_rowbytes(png_ptr, info_ptr);
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/* align rowsize to 4-byte boundary */
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rowsize = (rowsize + 3) & ~3;
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height = info_ptr->height;
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width = info_ptr->width;
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pngdata = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, height * rowsize);
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row_pointers = HeapAlloc(GetProcessHeap(), 0, height * (sizeof(VOID *)));
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if(!pngdata || !row_pointers){
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ret = E_FAIL;
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goto pngend;
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}
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for (row = 0; row < height; row++){
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row_pointers[row] = pngdata + row * rowsize;
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}
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ppng_read_image(png_ptr, row_pointers);
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bmi.biSize = sizeof(bmi);
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bmi.biWidth = width;
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bmi.biHeight = -height;
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bmi.biPlanes = 1;
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bmi.biBitCount = info_ptr->channels * 8;
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bmi.biCompression = BI_RGB;
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bmi.biSizeImage = height * rowsize;
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bmi.biXPelsPerMeter = 0;
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bmi.biYPelsPerMeter = 0;
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bmi.biClrUsed = 0;
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bmi.biClrImportant = 0;
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hdcref = GetDC(0);
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This->desc.u.bmp.hbitmap = CreateDIBitmap(
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hdcref,
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&bmi,
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CBM_INIT,
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pngdata,
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(BITMAPINFO*)&bmi,
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DIB_RGB_COLORS
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);
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ReleaseDC(0, hdcref);
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This->desc.picType = PICTYPE_BITMAP;
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OLEPictureImpl_SetBitmap(This);
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ret = S_OK;
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pngend:
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if(png_ptr)
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ppng_destroy_read_struct(&png_ptr,
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(info_ptr ? &info_ptr : (png_infopp) NULL),
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(png_infopp)NULL);
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HeapFree(GetProcessHeap(), 0, row_pointers);
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HeapFree(GetProcessHeap(), 0, pngdata);
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return ret;
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#else /* SONAME_LIBPNG */
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ERR("Trying to load PNG picture, but PNG supported not compiled in.\n");
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return E_FAIL;
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#endif
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}
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/*****************************************************
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* start of Icon-specific code
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*/
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static HRESULT OLEPictureImpl_LoadIcon(OLEPictureImpl *This, BYTE *xbuf, ULONG xread)
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{
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HICON hicon;
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@ -1583,6 +1775,9 @@ static HRESULT WINAPI OLEPictureImpl_Load(IPersistStream* iface,IStream*pStm) {
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case 0x4d42: /* Bitmap */
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hr = OLEPictureImpl_LoadDIB(This, xbuf, xread);
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break;
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case 0x5089: /* PNG */
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hr = OLEPictureImpl_LoadPNG(This, xbuf, xread);
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break;
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case 0x0000: { /* ICON , first word is dwReserved */
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hr = OLEPictureImpl_LoadIcon(This, xbuf, xread);
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break;
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@ -1878,6 +2073,9 @@ static HRESULT WINAPI OLEPictureImpl_Save(
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case 0x4947:
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FIXME("(%p,%p,%d), PICTYPE_BITMAP (format GIF) not implemented!\n",This,pStm,fClearDirty);
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break;
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case 0x5089:
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FIXME("(%p,%p,%d), PICTYPE_BITMAP (format PNG) not implemented!\n",This,pStm,fClearDirty);
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break;
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default:
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FIXME("(%p,%p,%d), PICTYPE_BITMAP (format UNKNOWN, using BMP?) not implemented!\n",This,pStm,fClearDirty);
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break;
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