bool AP_UnixApp::makePngPreview(const char * pszInFile, const char * pszPNGFile, UT_sint32 iWidth, UT_sint32 iHeight)
{
cairo_surface_t *surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, iWidth, iHeight);
cairo_t *cr = cairo_create (surface);
GR_UnixCairoAllocInfo ai(NULL, false);
GR_CairoGraphics * pG = static_cast<GR_CairoGraphics*>(GR_UnixCairoGraphics::graphicsAllocator(ai));
pG->setCairo(cr);
pG->beginPaint(); // needed to avoid cairo reference loss
UT_Error error = UT_OK;
PD_Document * pNewDoc = new PD_Document();
error = pNewDoc->readFromFile(pszInFile,IEFT_Unknown, NULL);
if (error != UT_OK)
{
return false;
}
AP_Preview_Abi * pPrevAbi = new AP_Preview_Abi(pG,iWidth,iHeight,NULL, PREVIEW_ZOOMED,pNewDoc);
dg_DrawArgs da;
memset(&da, 0, sizeof(da));
da.pG = pG;
GR_Painter * pPaint = new GR_Painter(pG);
pPaint->clearArea(0,0,pG->tlu(iWidth),pG->tlu(iHeight));
pPrevAbi->getView()->draw(0, &da);
pG->endPaint();
cairo_destroy(cr);
DELETEP(pPaint);
cairo_surface_write_to_png(surface, pszPNGFile);
cairo_surface_destroy(surface);
DELETEP(pG);
DELETEP(pPrevAbi); // This deletes pNewDoc
return true;
}
gint XAP_UnixDialog_FileOpenSaveAs::previewPicture (void)
{
UT_ASSERT (m_FC && m_preview);
UT_ASSERT(XAP_App::getApp());
const XAP_StringSet * pSS = m_pApp->getStringSet();
UT_return_val_if_fail( pSS, 0 );
// attach and clear the area immediately
GR_UnixCairoAllocInfo ai(m_preview);
GR_CairoGraphics* pGr =
(GR_CairoGraphics*) XAP_App::getApp()->newGraphics(ai);
const gchar * file_name = gtk_file_chooser_get_uri (m_FC);
GR_Font * fnt = pGr->findFont("Times New Roman",
"normal", "", "normal",
"", "12pt",
pSS->getLanguageName());
pGr->setFont(fnt);
UT_UTF8String str;
pSS->getValueUTF8(XAP_STRING_ID_DLG_IP_No_Picture_Label, str);
int answer = 0;
FG_Graphic * pGraphic = 0;
GR_Image *pImage = NULL;
double scale_factor = 0.0;
UT_sint32 scaled_width,scaled_height;
UT_sint32 iImageWidth,iImageHeight;
{
GR_Painter painter(pGr);
painter.clearArea(0, 0, pGr->tlu(m_preview->allocation.width), pGr->tlu(m_preview->allocation.height));
if (!file_name)
{
painter.drawChars (str.ucs4_str().ucs4_str(), 0, str.size(), pGr->tlu(12), pGr->tlu(static_cast<int>(m_preview->allocation.height / 2)) - pGr->getFontHeight(fnt)/2);
goto Cleanup;
}
// are we dealing with a file or directory here?
struct stat st;
if (!stat (file_name, &st))
{
if (!S_ISREG(st.st_mode))
{
painter.drawChars (str.ucs4_str().ucs4_str(), 0, str.size(), pGr->tlu(12), pGr->tlu(static_cast<int>(m_preview->allocation.height / 2)) - pGr->getFontHeight(fnt)/2);
goto Cleanup;
}
}
GsfInput * input = NULL;
UT_DEBUGMSG(("file_name %s \n",file_name));
input = UT_go_file_open (file_name, NULL);
if (!input)
goto Cleanup;
char Buf[4097] = ""; // 4096+nul ought to be enough
UT_uint32 iNumbytes = UT_MIN(4096, gsf_input_size(input));
gsf_input_read(input, iNumbytes, (guint8 *)(Buf));
Buf[iNumbytes] = '\0';
IEGraphicFileType ief = IE_ImpGraphic::fileTypeForContents(Buf,4096);
if((ief == IEGFT_Unknown) || (ief == IEGFT_Bogus))
{
painter.drawChars (str.ucs4_str().ucs4_str(), 0, str.size(), pGr->tlu(12), pGr->tlu(static_cast<int>(m_preview->allocation.height / 2)) - pGr->getFontHeight(fnt)/2);
g_object_unref (G_OBJECT (input));
goto Cleanup;
}
g_object_unref (G_OBJECT (input));
input = UT_go_file_open (file_name, NULL);
size_t num_bytes = gsf_input_size(input);
UT_Byte * bytes = (UT_Byte *) gsf_input_read(input, num_bytes,NULL );
if(bytes == NULL)
{
painter.drawChars (str.ucs4_str().ucs4_str(), 0, str.size(), pGr->tlu(12), pGr->tlu(static_cast<int>(m_preview->allocation.height / 2)) - pGr->getFontHeight(fnt)/2);
g_object_unref (G_OBJECT (input));
goto Cleanup;
}
UT_ByteBuf * pBB = new UT_ByteBuf();
pBB->append(bytes,num_bytes);
g_object_unref (G_OBJECT (input));
//
// OK load the data into a GdkPixbuf
//
bool bLoadFailed = false;
//
GdkPixbuf * pixbuf = pixbufForByteBuf ( pBB);
delete pBB;
if(pixbuf == NULL)
{
//
// Try a fallback loader here.
//
painter.drawChars (str.ucs4_str().ucs4_str(), 0, str.size(), pGr->tlu(12), pGr->tlu(static_cast<int>(m_preview->allocation.height / 2)) - pGr->getFontHeight(fnt)/2);
bLoadFailed = true;
goto Cleanup;
}
pImage = new GR_UnixImage(NULL,pixbuf);
iImageWidth = gdk_pixbuf_get_width (pixbuf);
iImageHeight = gdk_pixbuf_get_height (pixbuf);
if (m_preview->allocation.width >= iImageWidth && m_preview->allocation.height >= iImageHeight)
scale_factor = 1.0;
else
scale_factor = MIN( static_cast<double>(m_preview->allocation.width)/iImageWidth,
static_cast<double>(m_preview->allocation.height)/iImageHeight);
scaled_width = static_cast<int>(scale_factor * iImageWidth);
scaled_height = static_cast<int>(scale_factor * iImageHeight);
static_cast<GR_UnixImage *>(pImage)->scale(scaled_width,scaled_height);
painter.drawImage(pImage,
pGr->tlu(static_cast<int>((m_preview->allocation.width - scaled_width ) / 2)),
pGr->tlu(static_cast<int>((m_preview->allocation.height - scaled_height) / 2)));
answer = 1;
}
Cleanup:
FREEP(file_name);
DELETEP(pImage);
DELETEP(pGr);
DELETEP(pGraphic);
return answer;
}