Black text are not rendering as pure black

Kin Chung
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IP: 192.168.0.71 9 years 5 months ago #12222 by Kin Chung

Black text are not rendering as pure black was created by Kin Chung

I tried to use RenderToBmp(bmp, mat) to render a PDF page to a bitmap.
However, I found that the black text becomes (33, 32, 32) instead of (0, 0, 0)
Are there any settings to make it becomes (0,0,0)?

nermeen
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IP: 192.168.0.71 9 years 5 months ago #12228 by nermeen

Replied by nermeen on topic Black text are not rendering as pure black

We need more information:
Which Radaee SDK version are you using?
On what resolution are you generating the image?
Can you please send us the pdf, and the code you are using?

Kin Chung
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IP: 192.168.0.71 9 years 5 months ago #12234 by Kin Chung

Replied by Kin Chung on topic Black text are not rendering as pure black

Here is the PDF file.

And my code is as follow:
int dpi = 300;

float w = doc.GetPageWidth(pageNo) * dpi / 72;
float h = doc.GetPageHeight(pageNo) * dpi / 72;
final Page pdfPage = doc.GetPage(pageNo);
Bitmap bmp = Bitmap.createBitmap((int) w, (int) h, Bitmap.Config.ARGB_8888);
bmp.eraseColor(Color.WHITE);
Matrix mat = new Matrix(dpi/72f, -dpi/72f, 0, h);
pdfPage.RenderToBmp(bmp, mat);

nermeen
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IP: 192.168.0.71 9 years 5 months ago - 9 years 5 months ago #12240 by nermeen

Replied by nermeen on topic Black text are not rendering as pure black

We have tried your pdf, with the latest version 3.12RC and the bitmap is generated correctly

Code:

Document document = new Document();
PDFAssetStream m_asset_stream = new PDFAssetStream();
m_asset_stream.open(getAssets(), "eNAR1.pdf");
document.OpenStream(m_asset_stream, "");
Global.mBitmap = Bitmap.createBitmap((int) (document.GetPageWidth(0)), (int)
		(document.GetPageHeight(0)), Bitmap.Config.ARGB_8888);
Page page = document.GetPage(0);
Global.mBitmap.eraseColor(Color.WHITE);
page.RenderToBmp(Global.mBitmap, new Matrix( 1, -1, 0, document.GetPageHeight(0)));
page.Close();
document.Close();

Can you please recheck with the latest version?

Last edit: 9 years 5 months ago by nermeen.

Kin Chung
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IP: 192.168.0.71 9 years 5 months ago #12268 by Kin Chung

Replied by Kin Chung on topic Black text are not rendering as pure black

I tested 3.12 RC12 with RDPDFReader Sample app
However, it is still rendering grey instead of black

Here is the screenshot of the file opened attached.

My Device : Samsung Galaxy Tab S2 (SM-T813), Android 6.0.1

nermeen
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IP: 192.168.0.71 9 years 5 months ago - 9 years 5 months ago #12269 by nermeen

Replied by nermeen on topic Black text are not rendering as pure black

Are you using the code below? using this code we cannot reproduce the grey text, as you can see in the screenshot
We have tested on Samsung Galaxy Tab S (6.0.1)

Code:

Global.mBitmap = Bitmap.createBitmap((int) (document.GetPageWidth(0)), (int)
		(document.GetPageHeight(0)), Bitmap.Config.ARGB_8888);
Page page = document.GetPage(0);
Global.mBitmap.eraseColor(Color.WHITE);
page.RenderToBmp(Global.mBitmap, new Matrix( 1, -1, 0, document.GetPageHeight(0)));
page.Close();

Last edit: 9 years 5 months ago by nermeen.

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