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windowscodecs: Read PNGs sequentially.

This commit is contained in:
Damjan Jovanovic 2011-10-04 16:44:46 +02:00 committed by Alexandre Julliard
parent 8435e40874
commit ea35386b2b
1 changed files with 94 additions and 105 deletions
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199
dlls/windowscodecs/pngformat.c
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@ -56,11 +56,8 @@ MAKE_FUNCPTR(png_get_image_height);
MAKE_FUNCPTR(png_get_image_width);
MAKE_FUNCPTR(png_get_io_ptr);
MAKE_FUNCPTR(png_get_pHYs);
MAKE_FUNCPTR(png_get_progressive_ptr);
MAKE_FUNCPTR(png_get_PLTE);
MAKE_FUNCPTR(png_get_tRNS);
MAKE_FUNCPTR(png_process_data);
MAKE_FUNCPTR(png_progressive_combine_row);
MAKE_FUNCPTR(png_set_bgr);
MAKE_FUNCPTR(png_set_error_fn);
#if HAVE_PNG_SET_EXPAND_GRAY_1_2_4_TO_8
@ -72,7 +69,6 @@ MAKE_FUNCPTR(png_set_filler);
MAKE_FUNCPTR(png_set_gray_to_rgb);
MAKE_FUNCPTR(png_set_IHDR);
MAKE_FUNCPTR(png_set_pHYs);
MAKE_FUNCPTR(png_set_progressive_read_fn);
MAKE_FUNCPTR(png_set_read_fn);
MAKE_FUNCPTR(png_set_strip_16);
MAKE_FUNCPTR(png_set_tRNS_to_alpha);
@ -80,7 +76,6 @@ MAKE_FUNCPTR(png_set_write_fn);
MAKE_FUNCPTR(png_read_end);
MAKE_FUNCPTR(png_read_image);
MAKE_FUNCPTR(png_read_info);
MAKE_FUNCPTR(png_read_update_info);
MAKE_FUNCPTR(png_write_end);
MAKE_FUNCPTR(png_write_info);
MAKE_FUNCPTR(png_write_rows);
@ -108,11 +103,8 @@ static void *load_libpng(void)
LOAD_FUNCPTR(png_get_image_width);
LOAD_FUNCPTR(png_get_io_ptr);
LOAD_FUNCPTR(png_get_pHYs);
LOAD_FUNCPTR(png_get_progressive_ptr);
LOAD_FUNCPTR(png_get_PLTE);
LOAD_FUNCPTR(png_get_tRNS);
LOAD_FUNCPTR(png_process_data);
LOAD_FUNCPTR(png_progressive_combine_row);
LOAD_FUNCPTR(png_set_bgr);
LOAD_FUNCPTR(png_set_error_fn);
#if HAVE_PNG_SET_EXPAND_GRAY_1_2_4_TO_8
@ -124,7 +116,6 @@ static void *load_libpng(void)
LOAD_FUNCPTR(png_set_gray_to_rgb);
LOAD_FUNCPTR(png_set_IHDR);
LOAD_FUNCPTR(png_set_pHYs);
LOAD_FUNCPTR(png_set_progressive_read_fn);
LOAD_FUNCPTR(png_set_read_fn);
LOAD_FUNCPTR(png_set_strip_16);
LOAD_FUNCPTR(png_set_tRNS_to_alpha);
@ -132,7 +123,6 @@ static void *load_libpng(void)
LOAD_FUNCPTR(png_read_end);
LOAD_FUNCPTR(png_read_image);
LOAD_FUNCPTR(png_read_info);
LOAD_FUNCPTR(png_read_update_info);
LOAD_FUNCPTR(png_write_end);
LOAD_FUNCPTR(png_write_info);
LOAD_FUNCPTR(png_write_rows);
@ -165,6 +155,7 @@ typedef struct {
LONG ref;
png_structp png_ptr;
png_infop info_ptr;
png_infop end_info;
BOOL initialized;
int bpp;
int width, height;
@ -228,7 +219,7 @@ static ULONG WINAPI PngDecoder_Release(IWICBitmapDecoder *iface)
if (ref == 0)
{
if (This->png_ptr)
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, NULL);
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, &This->end_info);
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, This->image_bits);
@ -245,18 +236,86 @@ static HRESULT WINAPI PngDecoder_QueryCapability(IWICBitmapDecoder *iface, IStre
return E_NOTIMPL;
}
static void info_callback(png_structp png_ptr, png_infop info)
static void user_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
{
IStream *stream = ppng_get_io_ptr(png_ptr);
HRESULT hr;
ULONG bytesread;
hr = IStream_Read(stream, data, length, &bytesread);
if (FAILED(hr) || bytesread != length)
{
ppng_error(png_ptr, "failed reading data");
}
}
static HRESULT WINAPI PngDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
PngDecoder *This = impl_from_IWICBitmapDecoder(iface);
LARGE_INTEGER seek;
HRESULT hr=S_OK;
png_bytep *row_pointers=NULL;
UINT image_size;
UINT i;
int color_type, bit_depth;
png_bytep trans;
int num_trans;
png_uint_32 transparency;
png_color_16p trans_values;
UINT image_size;
HRESULT hr = S_OK;
PngDecoder *This;
jmp_buf jmpbuf;
This = (PngDecoder*) ppng_get_progressive_ptr(png_ptr);
TRACE("(%p,%p,%x)\n", iface, pIStream, cacheOptions);
EnterCriticalSection(&This->lock);
/* initialize libpng */
This->png_ptr = ppng_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!This->png_ptr)
{
hr = E_FAIL;
goto end;
}
This->info_ptr = ppng_create_info_struct(This->png_ptr);
if (!This->info_ptr)
{
ppng_destroy_read_struct(&This->png_ptr, NULL, NULL);
This->png_ptr = NULL;
hr = E_FAIL;
goto end;
}
This->end_info = ppng_create_info_struct(This->png_ptr);
if (!This->info_ptr)
{
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, NULL);
This->png_ptr = NULL;
hr = E_FAIL;
goto end;
}
/* set up setjmp/longjmp error handling */
if (setjmp(jmpbuf))
{
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, &This->end_info);
HeapFree(GetProcessHeap(), 0, row_pointers);
This->png_ptr = NULL;
hr = E_FAIL;
goto end;
}
ppng_set_error_fn(This->png_ptr, &jmpbuf, user_error_fn, user_warning_fn);
/* seek to the start of the stream */
seek.QuadPart = 0;
hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto end;
/* set up custom i/o handling */
ppng_set_read_fn(This->png_ptr, pIStream, user_read_data);
/* read the header */
ppng_read_info(This->png_ptr, This->info_ptr);
/* choose a pixel format */
color_type = ppng_get_color_type(This->png_ptr, This->info_ptr);
@ -355,6 +414,7 @@ static void info_callback(png_structp png_ptr, png_infop info)
goto end;
}
/* read the image data */
This->width = ppng_get_image_width(This->png_ptr, This->info_ptr);
This->height = ppng_get_image_height(This->png_ptr, This->info_ptr);
This->stride = This->width * This->bpp;
@ -367,97 +427,25 @@ static void info_callback(png_structp png_ptr, png_infop info)
goto end;
}
ppng_read_update_info(This->png_ptr, This->info_ptr);
row_pointers = HeapAlloc(GetProcessHeap(), 0, sizeof(png_bytep)*This->height);
if (!row_pointers)
{
hr = E_OUTOFMEMORY;
goto end;
}
for (i=0; i<This->height; i++)
row_pointers[i] = This->image_bits + i * This->stride;
ppng_read_image(This->png_ptr, row_pointers);
HeapFree(GetProcessHeap(), 0, row_pointers);
row_pointers = NULL;
ppng_read_end(This->png_ptr, This->end_info);
This->initialized = TRUE;
end:
if (FAILED(hr))
ERR("PNG info parsing failed, hr=0x%08X\n", hr);
}
static void row_callback(png_structp png_ptr, png_bytep new_row,
png_uint_32 row_num, int pass)
{
png_bytep old_row;
PngDecoder *This;
This = (PngDecoder*) ppng_get_progressive_ptr(png_ptr);
if (!This->initialized)
return;
old_row = ((png_bytep)This->image_bits) + row_num*This->stride;
ppng_progressive_combine_row(png_ptr, old_row, new_row);
}
static void end_callback(png_structp png_ptr, png_infop info)
{
}
static HRESULT WINAPI PngDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,
WICDecodeOptions cacheOptions)
{
PngDecoder *This = impl_from_IWICBitmapDecoder(iface);
LARGE_INTEGER seek;
HRESULT hr=S_OK;
png_bytep *row_pointers=NULL;
jmp_buf jmpbuf;
BYTE buffer[8096];
ULONG bytesRead = 0;
TRACE("(%p,%p,%x)\n", iface, pIStream, cacheOptions);
EnterCriticalSection(&This->lock);
/* initialize libpng */
This->png_ptr = ppng_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!This->png_ptr)
{
hr = E_FAIL;
goto end;
}
This->info_ptr = ppng_create_info_struct(This->png_ptr);
if (!This->info_ptr)
{
ppng_destroy_read_struct(&This->png_ptr, NULL, NULL);
This->png_ptr = NULL;
hr = E_FAIL;
goto end;
}
/* set up setjmp/longjmp error handling */
if (setjmp(jmpbuf))
{
ppng_destroy_read_struct(&This->png_ptr, &This->info_ptr, NULL);
HeapFree(GetProcessHeap(), 0, row_pointers);
This->png_ptr = NULL;
hr = E_FAIL;
goto end;
}
ppng_set_error_fn(This->png_ptr, &jmpbuf, user_error_fn, user_warning_fn);
/* seek to the start of the stream */
seek.QuadPart = 0;
hr = IStream_Seek(pIStream, seek, STREAM_SEEK_SET, NULL);
if (FAILED(hr)) goto end;
/* set up progressive loading */
ppng_set_progressive_read_fn(This->png_ptr, (void*)This,
info_callback, row_callback, end_callback);
do
{
hr = IStream_Read(pIStream, buffer, sizeof(buffer), &bytesRead);
if (SUCCEEDED(hr))
ppng_process_data(This->png_ptr, This->info_ptr, buffer, bytesRead);
} while (bytesRead == sizeof(buffer));
if (hr == S_FALSE)
hr = S_OK;
if (FAILED(hr))
ERR("reading PNG file failed, error 0x%08X\n", hr);
if (!This->initialized)
hr = E_FAIL;
end:
LeaveCriticalSection(&This->lock);
@ -780,6 +768,7 @@ HRESULT PngDecoder_CreateInstance(IUnknown *pUnkOuter, REFIID iid, void** ppv)
This->ref = 1;
This->png_ptr = NULL;
This->info_ptr = NULL;
This->end_info = NULL;
This->initialized = FALSE;
This->image_bits = NULL;
InitializeCriticalSection(&This->lock);