BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Visual transistions          BorlandTalk.com Forum Index -> C++ Builder (Graphics) View previous topic :: View next topic   Author Message Ed Critchlow Guest Posted: Wed Oct 29, 2003 8:05 pm    Post subject: Visual transistions I would like to be able to slowly dissolve from one image to another, not simply display a new image. I know how to do this in VC++ but in my application I have a form with text labels and images which are just filled in and displayed. I can't find where they are actually drawn. Does this all happen in the bowels of VCL? Any ideas of how to go about this? Ed Back to top Francisco Sanchez Guest Posted: Thu Oct 30, 2003 3:15 pm    Post subject: Re: Visual transistions Hi, In article <3fa01d8e (AT) newsgroups (DOT) borland.com>, [email]edc (AT) record-machine (DOT) com[/email] says... Quote: I would like to be able to slowly dissolve from one image to another, not simply display a new image. I know how to do this in VC++ but in my application I have a form with text labels and images which are just filled in and displayed. I can't find where they are actually drawn. Does this all happen in the bowels of VCL? Any ideas of how to go about this? Take a look at Billenium Effects (shareware). You can download an exe demo and trial versions at http://www.billeniumsoft.com Regards, Francisco Sanchez [email]fsanchez (AT) billeniumsoft (DOT) com[/email] http://www.billeniumsoft.com Back to top Damon Chandler (TeamB) Guest Posted: Fri Oct 31, 2003 7:28 am    Post subject: Re: Visual transistions Ed, Quote: I would like to be able to slowly dissolve from one image to another, not simply display a new image. I know how to do this in VC++ but in my application I have a form with text labels and images which are just filled in and displayed. If you're using a TImage component, then you'll need to work with its contained TBitmap object. Here's an example that demonstrates how to gradually fade from a bitmap (Bitmap1) displayed in a TImage (Image1) to another bitmap (Bitmap2) that's loaded from a file... #include <cassert> #include <memory> void __fastcall TForm1::BitBtn1Click(TObject *Sender) { // grab a pointer to the TBitmap object displayed in Image1 Graphics::TBitmap* Bitmap1 = Image1->Picture->Bitmap; // store Bitmap1's dimensions SIZE const SBitmap = {Bitmap1->Width, Bitmap1->Height}; // load the next image into a new TBitmap object std::auto_ptr<Graphics::TBitmap> Bitmap2(new Graphics::TBitmap()); Bitmap2->LoadFromFile("c:/bitmap2.bmp"); assert(Bitmap2->Width == SBitmap.cx); assert(Bitmap2->Height == SBitmap.cy); // assuming 24-bit images assert(Bitmap1->PixelFormat == pf24bit); assert(Bitmap2->PixelFormat == pf24bit); // incrementally blend the pixel values of the two // images, storing the results in Bitmap1... for (int step = 1; step < 10; ++step) { float const alpha2 = step / 10.0f; float const alpha1 = 1.0f - alpha2; for (int y = 0; y < SBitmap.cy; ++y) { // grab a pointer to the y-th row of each image RGBTRIPLE* pRow1 = static_castScanLine[y]); RGBTRIPLE const* pRow2 = static_cast<RGBTRIPLE*>(Bitmap2->ScanLine[y]); for (int x = 0; x < SBitmap.cx; ++x) { pRow1[x].rgbtRed = alpha1 * pRow1[x].rgbtRed + alpha2 * pRow2[x].rgbtRed; pRow1[x].rgbtGreen = alpha1 * pRow1[x].rgbtGreen + alpha2 * pRow2[x].rgbtGreen; pRow1[x].rgbtBlue = alpha1 * pRow1[x].rgbtBlue + alpha2 * pRow2[x].rgbtBlue; } } // instruct Image1 to redraw Bitmap1 Image1->Refresh(); Sleep(50); } } You may want to use a TTimer component to avoid the blocking Sleep() call. Also, if you notice flickering, set the TImage's Stretch property to true. Good luck, Damon (TeamB) Back to top Damon Chandler (TeamB) Guest Posted: Fri Oct 31, 2003 7:42 am    Post subject: Re: Visual transistions Also, you might want to have a look at the AlphaBlend() function if you don't need to deploy on Windows 95 or NT4... http://tinyurl.com/t478 Damon Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> C++ Builder (Graphics) All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.