Is it possible to smooth a scaled TBitmap in Delphi?

Posted by Brian Frost on Stack Overflow See other posts from Stack Overflow or by Brian Frost
Published on 2010-05-07T11:11:39Z Indexed on 2010/05/07 11:18 UTC
Read the original article Hit count: 229

Filed under:

tbitmap

|

blur

|

delphi

|

stretched

|

image

I am using Stretched=True on a TBitmap with a 256x256 image. This gets scaled down by 1,2,4 or 8. As expected, text on the bitmap gets more horrible the more I depart from '1'. I notice though that Windows 7 explorer renders a scaled down version of the bitmap 'softer' and more pleasing. Is it possible to 'blur' a TBitmap in this way?

© Stack Overflow or respective owner

Related posts about tbitmap

Is it possible to smooth a scaled TBitmap in Delphi?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am using Stretched=True on a TBitmap with a 256x256 image. This gets scaled down by 1,2,4 or 8. As expected, text on the bitmap gets more horrible the more I depart from '1'. I notice though that Windows 7 explorer renders a scaled down version of the bitmap 'softer' and more pleasing. Is it possible… >>> More
Large number of soft page faults when assigning a TJpegImage to a TBitmap

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a Delphi 6 Pro application that processes incoming jpeg frames from a streaming video server. The code works but I recently noticed that it generates a huge number of soft page faults over time. After doing some investigation, the page faults appear to be coming from one particular graphics… >>> More
Delphi fast large bitmap creation (without clearing)

as seen on Stack Overflow - Search for 'Stack Overflow'
When using the TBitmap wrapper for a GDI bitmap from the unit Graphics I noticed it will always clear out the bitmap (using a PatBlt call) when setting up a bitmap with SetSize( w, h ). When I copy in the bits later on (see routine below) it seems ScanLine is the fastest possibility and not SetDIBits… >>> More
Sending and receiving a TMemoryStream using IdTCPClient and IdTCPServer

as seen on Stack Overflow - Search for 'Stack Overflow'
I found Remy Lebeau's chat demo of IdTCP components in XE2 and I wanted to play with it a little bit. (It can be found here) I would like to send a picture using these components and the best approach seems to be using TMemoryStream. If I send strings, the connection works fine, the strings are transmitted… >>> More
Why the compiler is not compiling a line in C++ Builder?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi boys: I was programming an application in C++ Builder 6, and I had encountered this rare problem: void RotateDice() { Graphics::TBitmap *MYbitmap = new Graphics::TBitmap(); Randomize(); int rn = random(6) + 1; switch (rn) { case 1: { //... break; } … >>> More

Related posts about blur

What is the most efficient way to blur in a shader?

as seen on Game Development - Search for 'Game Development'
I'm currently working on screen space reflections. I have perfectly reflective mirror-like surfaces working, and I now need to use a blur to make the reflection on surfaces with a low specular gloss value look more diffuse. I'm having difficulty deciding how to apply the blur, though. My first idea… >>> More
Keep focus on blur event

as seen on Stack Overflow - Search for 'Stack Overflow'
I am using jquery to keep the focus on a text box when you click on a specific div. It works well in Internet Explorer but not in Firefox. Any suggestions? var clickedDiv = false; $('input').blur(function() { if (clickedDiv) { $('input').focus(); } }); $('div').mousedown(function() { clickedDiv… >>> More
Why does filter: blur(0) still cause text to blur under Webkit?

as seen on Stack Overflow - Search for 'Stack Overflow'
I've come across a bug today that's taken far longer than I would like to admit to identify. Essentially: setting a filter: blur(0) (or the vendor-specific -webkit-filter) on an element should - I believe - mean that no form of blur is applied. However, having tested this today, it would appear… >>> More
GLSL - one-pass gaussian blur

as seen on Game Development - Search for 'Game Development'
It is possible to implement fragment shader to do one-pass gaussian blur? I have found lot of implementation of two-pass blur (gaussian and box blur): http://callumhay.blogspot.com/2010/09/gaussian-blur-shader-glsl.html http://www.gamerendering.com/2008/10/11/gaussian-blur-filter-shader/ http://www… >>> More
Two pass blur shader using libgdx tile map renderer

as seen on Game Development - Search for 'Game Development'
I am trying to apply the following technique: blur effect using two pass shader to my libgdx game using the OrthogonalTiledMapRenderer. The idea is to blur the background wich is also a tilemap but rendered with another camera with a different zoom applied. Here is a screen capture without effect: Using… >>> More