BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  DirectDraw: <ddraw.h> and Linking Error          BorlandTalk.com Forum Index -> C++ Builder (Graphics) View previous topic :: View next topic   Author Message server Guest Posted: Mon Mar 20, 2006 10:03 pm    Post subject: DirectDraw: <ddraw.h> and Linking Error message unavailable Back to top Darren Dwyer Guest Posted: Mon Mar 20, 2006 10:03 pm    Post subject: Re: DirectDraw: <ddraw.h> and Linking Error Hi James, don't bother wasting your time, try our components instead... http://bcb-tools.com "RAD DirectX for Borland C++ Builder" - darren "James O'Brien" <obrien (AT) nsicnet (DOT) com> wrote in message news:43e289ea$1 (AT) newsgroups (DOT) borland.com... Quote: Hello, I've typed in a simple DirectDraw example program found in the book "Borland C++ Builder 4 Unleashed". The source code compliles without a problem, but I receive the following linking error: Unresolved external 'DirectDrawCreate' referenced from D:\PROJECTS\DIRECTDRAW\SAMPLE01\SDMAIN.OBJ In the course of looking for why this might be happening, I came across basically the same program example in the following directory: "$(BCB)\Examples\DDraw\DDraw1a" When I loaded/compiled this project it I didn't receive the linking error and the program ran. I've looked at the source code(C++ and Header files) of both projects and haven't found any differences(except for comment lines). I've also looked at the Options dialog for both projects and haven't found any differences. Anyway, why does the project I've entered in manually generate the linking error while the project found in Examples directory build without a hitch? Thanks, James OBrien Back to top JD Guest Posted: Fri Jun 09, 2006 7:50 pm    Post subject: Re: How to avoid flicker Azrin Aris <azrin_aris (AT) yahoo (DOT) com> wrote: Quote: [...] when I resize the component the Image flickers. [...] void __fastcall TGeoImage::Paint(void) { if(FImage) { Canvas->Draw(0,0,FImage); } } Use CopyRect instead of Draw. ~ JD Back to top Michel Leunen Guest Posted: Sat Jun 10, 2006 1:08 pm    Post subject: Re: How to avoid flicker Azrin Aris wrote: Quote: I'm writing a component from TGraphicControl to show part of a big JPG image file. My first problem is when I resize the component the Image flickers. Did you try setting the form property DoubleBuffered to true and/or setting your TImage Stretch property to true? Michel -- ---------------------------------------- Michel Leunen mailto: see my homepage. C++Builder, BCC5.5.1 Web site: http://www.leunen.com/ ---------------------------------------- Back to top Azrin Aris Guest Posted: Sat Jun 10, 2006 5:06 pm    Post subject: Re: How to avoid flicker Michel Leunen wrote: Quote: Azrin Aris wrote: I'm writing a component from TGraphicControl to show part of a big JPG image file. My first problem is when I resize the component the Image flickers. Did you try setting the form property DoubleBuffered to true and/or setting your TImage Stretch property to true? Michel Hi Michel, After I set the Main Form DoubleBuffered to true, the flicker gone. But I'm writing a component and is there a way to avoid flicker programatically from the component itself? Azrin Back to top Michel Leunen Guest Posted: Sat Jun 10, 2006 8:38 pm    Post subject: Re: How to avoid flicker Azrin Aris wrote: Quote: After I set the Main Form DoubleBuffered to true, the flicker gone. But I'm writing a component and is there a way to avoid flicker programatically from the component itself? Descendants from TGraphicControl have a Parent property which you could use to test if it's a TForm descendant. But IMO, it'd be far better if you could provide a component flicker free by its own and implement double-buffering yourself. Just draw on the canvas of a in-memory bitmap and when you are done, copy your bitmap to your canvas using BitBlt(). Do a search on google, there were many posts related to double-buffering or flickering. Michel -- ---------------------------------------- Michel Leunen mailto: see my homepage. C++Builder, BCC5.5.1 Web site: http://www.leunen.com/ ---------------------------------------- Back to top Azrin Aris Guest Posted: Sun Jun 11, 2006 12:33 am    Post subject: Re: How to avoid flicker Michel Leunen wrote: Quote: Azrin Aris wrote: After I set the Main Form DoubleBuffered to true, the flicker gone. But I'm writing a component and is there a way to avoid flicker programatically from the component itself? Descendants from TGraphicControl have a Parent property which you could use to test if it's a TForm descendant. But IMO, it'd be far better if you could provide a component flicker free by its own and implement double-buffering yourself. Just draw on the canvas of a in-memory bitmap and when you are done, copy your bitmap to your canvas using BitBlt(). Do a search on google, there were many posts related to double-buffering or flickering. Michel Thanks Michel, I'll try the BitBlt method. Azrin Back to top Remy Lebeau (TeamB) Guest Posted: Thu Aug 17, 2006 9:32 pm    Post subject: Re: Bitmap pixel access "Michael" <sbi (AT) telkomsa (DOT) net> wrote in message news:44e4470b (AT) newsgroups (DOT) borland.com... Quote: Can any one help me with the most optimal way to access bitmap pixels for image manipulation. Use the TBitmap::ScanLine property. That provides direct access to each row of pixel data, where the Height specifies the number of rows, and the Width specifies the number of items in each row. The format of the data depends on which PixelFormat is being used. For example, if the PixelFormat is pf8bit, then each ScanLine item will contain an array of bytes, 1 per pixel, which are indexes into the bitmaps' color palette. On the other hand, if the PixelFormat is pf24bit, then each ScanLine item will contain an array of RGBTRIPLE values, 1 per pixel, which are the actual color values, so no color palette is used. Gambit P.S. check your computer clock settings. You are 7 years behind. Back to top Michael Guest Posted: Mon Aug 21, 2006 9:34 pm    Post subject: Re: Bitmap pixel access Is that going to work as I need to set up a 2d array of pixels so I can access them as rows and columns. "Remy Lebeau (TeamB)" <no.spam (AT) no (DOT) spam.com> wrote in message news:44e49a60$1 (AT) newsgroups (DOT) borland.com... Quote: "Michael" <sbi (AT) telkomsa (DOT) net> wrote in message news:44e4470b (AT) newsgroups (DOT) borland.com... Can any one help me with the most optimal way to access bitmap pixels for image manipulation. Use the TBitmap::ScanLine property. That provides direct access to each row of pixel data, where the Height specifies the number of rows, and the Width specifies the number of items in each row. The format of the data depends on which PixelFormat is being used. For example, if the PixelFormat is pf8bit, then each ScanLine item will contain an array of bytes, 1 per pixel, which are indexes into the bitmaps' color palette. On the other hand, if the PixelFormat is pf24bit, then each ScanLine item will contain an array of RGBTRIPLE values, 1 per pixel, which are the actual color values, so no color palette is used. Gambit P.S. check your computer clock settings. You are 7 years behind. Back to top Urbano's Guest Posted: Thu Dec 28, 2006 12:46 am    Post subject: Re: ci sono "Nutella" <yourstar_70 (AT) hotmail (DOT) com> ha scritto nel messaggio news:emuel0$otp$2@nnrp-beta.newsland.it Quote: 29334238102938194 gruppi diversi e non uno che vada bene per chiedere info sul diritto di recesso. Sitcazzi. prova qui!! -- *eh* ? (cit) Back to top Colin B Maharaj Guest Posted: Tue Jun 24, 2008 5:51 am    Post subject: Re: TextOut - how to format a double? Quote: How can I format TextOut()? I would use the Help feature in my old BCB 6, but so far the engineers can't seem to get it properly registered. Thanks, Nick Your thinking is incorrect!! Do not format TextOut Instead, first format the number into a text variable, then text out that variable. Back to top Pentti Nyström Guest Posted: Tue Nov 18, 2008 7:19 am    Post subject: Ryhmän sfnet.viestinta.www virallinen kuvaus M.T.09.05-08.Tanskan insinööriliitossa uskotaan uusiutuvaan energiaan "Energiasuunnitelma 2030"- nimisen raportin (ES). Sen tekoon osallistui 1 600 insinööriä ja muita energia-asiantuntijoita. ES:stä sijoitukset uudisenergiaan ovat ekologisesti ja taloudellisesti hyvin perusteltuja. Samoin varteenotettavia vientimahdollisuuksia. Uudisenergia tulee rajusti lisääntymään. Tanska pääsee v.2030 pitkälle kokonaan uudisenergiaan. Arvellaan 50% osuutta jo silloin. Kasvihuonepäästöistä poistuu 60% ja näin säästyy 15 miljardia kruunua/v. Investointitulojen kasvuksi 30 miljardista 160 miljardiin v-30. Säästöä 845 petajoulesta 580 petajouleen. Suomessa 1 400 petajoulea. Teollisuus voi vähentää 30%! Säästöä tästä 6 miljardia kruunua. Takaisinmaksuaika investoinneista 6-7 vuodessa. Tähän budjetti 107 milj. euroa. Rakennusten energiankulutuksen puolitus 2030. 15% tulisi aurinkoenergiasta. Sähköstä pois 40%. Jo 2020 jälkeen rakennettavien talojen arvioidaan olevan JO energianeutraalin. Energiasäästösäätiöön pannaan miljardi kruunua. Liikenne Tanskassa vielä kasvaa 2%/v. Siitä tullaan poistamaan 20% nykytasosta korvaamalla siitä biopolttoaineella. Viidennes sähköautoihin. Rautateille lisäystä. Verotus suosimaan ympäristöystävällisiä autoja. Kuljetuksiin 200 miljardia kruunua l. 27miljardia. Vähentäen terveydenhuoltoa, ruuhkien ja ympäristönsuojelun menot. Huomattavasti nykyistä suurempi osuus uusiutuvista lähteistä. Tuulipuolella Tanska suuntaa merien offshoretuulivoimaan. ES:n tavoite on kaksinkertaistaa tuulivoimaansa sähköstä huikeaan 60 prosenttiin!!! Aurinkosoluille 2030 ennakoidaan 2% ja aaltovoiman 5% sähköntuotannosta. Aaltovoimaa pidetään erittäin merkittävänä. Biomassasta ennakoidaan 30% v.2030. Mukana biopolttoaineiden 20%. Biokaasuun luotetaan, samoin uuden sukupolven biopolttoaineisiin. Näihin Tanska sijoittaa paljon. Biopolttoainesektorikasvaa 20 miljardiin kruunuun 2,7miljardiin euroon. Kolmannes 2030 voimaloista käyttää jo tehokkaita polttokennoja ja lämpöpumput ovat arkilaitteita. Tutkimuksiin nostetaan 350 miljoonasta miljardiin kruunuun. Valtio kevittää uudisenergiainvestointiriskittömämpiä syöttötariffeja. "Saastuttaja maksaa periaatteella!"(Suomessa ydinalalle moinen olisi ennenkokematonta!) Suositellaan luopumista verotuksesta joka estää siirtymistä fossiileista uudisenergiaan. Lentopetrolille veroa. Tanskassa on oleellisesti helpompaa toteuttaa uutta energiapolitiikkaa. Valitettavasti meillä ei edelleenkään olla valmiita sellaisiin toimiin, joilla kokonaisenergian kulutus saadaan selvään laskuun ja uusiutuvan energian ja sitä tukevan teknologian käyttö vahvaan nousuun. U.B. Linström kehitys- ja ympäristökysymyksiin erikoistunen professorin yleisöosastokirjoituslyhemnelmä. 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