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Bug 561

Summary:	Transparency in png images: GDI+ slow, GDI not supported
Product:	VCL TeeChart	Reporter:	yeray alonso <yeray>
Component:	Canvas	Assignee:	Steema Issue Manager <issuemanager>
Status:	CONFIRMED ---
Severity:	enhancement	CC:	routeur01
Priority:	---
Version:	unspecified
Target Milestone:	---
Hardware:	PC
OS:	Windows
URL:	http://www.teechart.net/support/viewtopic.php?f=3&t=14630
Chart Series:	---	Delphi / C++ Builder RAD IDE Version:
Attachments:	Transparency in png image, GDI+ vs GDI TChart Test different image formats, all with transparency TEST TeeTree move Speed with Transparency

Description yeray alonso 2014-02-05 11:00:27 EST

Transparency in images in GDI+ is respected but slow.
Transparency in images in GDI is not supported.

Comment 1 yeray alonso 2014-02-05 11:01:34 EST

Created attachment 84 [details]
Transparency in png image, GDI+ vs GDI

Comment 2 yeray alonso 2014-03-03 06:27:20 EST

Created attachment 108 [details]
TChart

Comment 3 yeray alonso 2014-03-03 06:28:37 EST

Attached a project where the same issue has been reproduced with a TChart instead of with a TTree.

Comment 4 yeray alonso 2014-03-06 05:56:30 EST

Created attachment 110 [details]
Test different image formats, all with transparency

Test project to see the differences between three image formats (png, jpg and bmp), all with transparency

Comment 5 routeur01 2014-03-06 07:34:30 EST

Created attachment 111 [details]
TEST TeeTree move Speed  with Transparency

(In reply to yeray alonso from comment #4)
> Fichier joint créé 110
> Test different image formats, all with transparency
> 
> Test project to see the differences between three image formats (png, jpg
> and bmp), all with transparency

Hi,

I've modified the project and add a Teetree in design.
You could see the time speed when moving picture in the TeeTree.


Example with my results:

IDE: Delphi 2007
Teechart version: V2013.09.131119

-> Time for 20 step move:

        in GDI+:
        BMP non transparent: 324ms
        BMP Transparent   : 5640ms