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author | tobigun <tobigun@b956fd51-792f-4845-bead-9b4dfca2ff2c> | 2010-10-10 22:59:33 +0000 |
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committer | tobigun <tobigun@b956fd51-792f-4845-bead-9b4dfca2ff2c> | 2010-10-10 22:59:33 +0000 |
commit | 35187604cef84864a908972d07361a5bd57e29ca (patch) | |
tree | dc95a8b1abeabd3a466729056ab8d37aaa6e72ea /src/lib/freetype/demo/nehe/lesson43.dpr | |
parent | 58c1daf3692d4c5c534750a4fda97e087b0f0cbb (diff) | |
parent | 02bd10f0798829ab69d2028b988cb2a54eae292a (diff) | |
download | usdx-35187604cef84864a908972d07361a5bd57e29ca.tar.gz usdx-35187604cef84864a908972d07361a5bd57e29ca.tar.xz usdx-35187604cef84864a908972d07361a5bd57e29ca.zip |
rename trunk to 1.1svn/1.1github/svn/1.1
git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/branches/1.1@2662 b956fd51-792f-4845-bead-9b4dfca2ff2c
Diffstat (limited to '')
-rw-r--r-- | src/lib/freetype/demo/nehe/lesson43.dpr | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/src/lib/freetype/demo/nehe/lesson43.dpr b/src/lib/freetype/demo/nehe/lesson43.dpr new file mode 100644 index 00000000..fe296fb5 --- /dev/null +++ b/src/lib/freetype/demo/nehe/lesson43.dpr @@ -0,0 +1,289 @@ +program lesson43; +(* + * This code was created by Jeff Molofee '99 + * (ported to Linux/SDL by Ti Leggett '01) + * + * If you've found this code useful, please let me know. + * + * Visit Jeff at http://nehe.gamedev.net/ + * + * or for port-specific comments, questions, bugreports etc. + * email to leggett@eecs.tulane.edu + *) + +{$IFDEF FPC} + {$mode delphi}{$H+} +{$ENDIF} + +{$APPTYPE Console} + +uses + moduleloader in '../../../JEDI-SDL/SDL/Pas/moduleloader.pas', + SDL in '../../../JEDI-SDL/SDL/Pas/sdl.pas', + gl in '../../../JEDI-SDL/OpenGL/Pas/gl.pas', + glu in '../../../JEDI-SDL/OpenGL/Pas/glu.pas', + ctypes in '../../../ctypes/ctypes.pas', + FreeType in '../../freetype.pas', + UFreeType in 'UFreeType.pas', + math, + sysutils; + +const + // screen width, height, and bit depth + SCREEN_WIDTH = 640; + SCREEN_HEIGHT = 480; + SCREEN_BPP = 16; + +var + our_font: TFontData; + // This is our SDL surface + surface: PSDL_Surface; + cnt1, cnt2: GLfloat; + +(* function to release/destroy our resources and restoring the old desktop *) +procedure Quit(returnCode: integer); +begin + // clean up the window + SDL_Quit( ); + + // and exit appropriately + Halt( returnCode ); +end; + +(* function to reset our viewport after a window resize *) +function resizeWindow(width: integer; height: integer): boolean; +var + // Height / width ration + ratio: GLfloat; +begin + // Protect against a divide by zero + if ( height = 0 ) then + height := 1; + + ratio := width / height; + + // Setup our viewport. + glViewport( 0, 0, GLsizei(width), GLsizei(height) ); + + // change to the projection matrix and set our viewing volume. + glMatrixMode( GL_PROJECTION ); + glLoadIdentity( ); + + // Set our perspective + gluPerspective( 45.0, ratio, 0.1, 100.0 ); + + // Make sure we're chaning the model view and not the projection + glMatrixMode( GL_MODELVIEW ); + + // Reset The View + glLoadIdentity( ); + + Result := true; +end; + +(* function to handle key press events *) +procedure handleKeyPress(keysym: PSDL_keysym); +begin + case ( keysym^.sym ) of + SDLK_ESCAPE: + begin + // ESC key was pressed + Quit( 0 ); + end; + SDLK_F1: + begin + // F1 key was pressed + // this toggles fullscreen mode + SDL_WM_ToggleFullScreen( surface ); + end; + end; +end; + +(* general OpenGL initialization function *) +function initGL(): boolean; +begin + // Enable smooth shading + glShadeModel( GL_SMOOTH ); + + // Set the background black + glClearColor( 0.0, 0.0, 0.0, 0.0 ); + + // Depth buffer setup + glClearDepth( 1.0 ); + + // Enables Depth Testing + glEnable( GL_DEPTH_TEST ); + + // The Type Of Depth Test To Do + glDepthFunc( GL_LEQUAL ); + + // Really Nice Perspective Calculations + glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ); + + our_font := TFontData.Create('Test.ttf', 16); + + Result := true; +end; + +(* Here goes our drawing code *) +function drawGLScene(): boolean; +begin + glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT); // Clear Screen And Depth Buffer + glLoadIdentity(); // Reset The Current Modelview Matrix + glTranslatef(0.0, 0.0, -1.0); // Move One Unit Into The Screen + + // Blue Text + glColor3ub(0, 0, $ff); + + // Position The WGL Text On The Screen + glRasterPos2f(-0.40, 0.35); + + // Here We Print Some Text Using Our FreeType Font + // The only really important command is the actual print() call, + // but for the sake of making the results a bit more interesting + // I have put in some code to rotate and scale the text. + + // Red text + glColor3ub($ff, 0, 0); + + glPushMatrix(); + glLoadIdentity(); + glRotatef(cnt1, 0, 0,1); + glScalef(1, 0.8 + 0.3*cos(cnt1/5) ,1); + glTranslatef(-180, 0, 0); + TFreeType.print(our_font, 320, 240, 'Active FreeType Text - ' + FloatToStr(cnt1)); + glPopMatrix(); + + //Uncomment this to test out print's ability to handle newlines. + //TFreeType.print(our_font, 320, 200, 'Here'#13'there'#13'be'#13#13'newlines'#13'.'); + + cnt1 := cnt1 + 0.051; // Increase The First Counter + cnt2 := cnt2 + 0.005; // Increase The First Counter + + SDL_GL_SwapBuffers( ); + + Result := true; +end; + +var + // Flags to pass to SDL_SetVideoMode + videoFlags: integer; + // main loop variable + done: boolean = false; + // used to collect events + event: TSDL_Event; + // this holds some info about our display + videoInfo: PSDL_VideoInfo; + // whether or not the window is active + isActive: boolean = true; + +begin + // initialize SDL + if ( SDL_Init( SDL_INIT_VIDEO ) < 0 ) then + begin + writeln( ErrOutput, 'Video initialization failed: ' + SDL_GetError() ); + Quit( 1 ); + end; + + // Fetch the video info + videoInfo := SDL_GetVideoInfo( ); + + if ( videoInfo = nil ) then + begin + writeln( ErrOutput, 'Video query failed: ' + SDL_GetError() ); + Quit( 1 ); + end; + + SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 ); // Enable double buffering + + // the flags to pass to SDL_SetVideoMode + videoFlags := SDL_OPENGL; // Enable OpenGL in SDL + videoFlags := videoFlags or SDL_HWPALETTE; // Store the palette in hardware + videoFlags := videoFlags or SDL_RESIZABLE; // Enable window resizing + + // This checks to see if surfaces can be stored in memory + if ( videoInfo^.hw_available <> 0 ) then + videoFlags := videoFlags or SDL_HWSURFACE + else + videoFlags := videoFlags or SDL_SWSURFACE; + + // This checks if hardware blits can be done + if ( videoInfo^.blit_hw <> 0 ) then + videoFlags := videoFlags or SDL_HWACCEL; + + // Sets up OpenGL double buffering + SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 ); + + // get a SDL surface + surface := SDL_SetVideoMode( SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, + videoFlags ); + + // Verify there is a surface + if ( surface = nil ) then + begin + writeln( ErrOutput, 'Video mode set failed: ' + SDL_GetError() ); + Quit( 1 ); + end; + + // initialize OpenGL + initGL(); + + // resize the initial window + resizeWindow( SCREEN_WIDTH, SCREEN_HEIGHT ); + + // wait for events + while ( not done ) do + begin + { handle the events in the queue } + + while ( SDL_PollEvent( @event ) <> 0 ) do + begin + case( event.type_ ) of + SDL_ACTIVEEVENT: + begin + // Something's happend with our focus + // If we are iconified, we shouldn't draw the screen + if ( (event.active.state and SDL_APPACTIVE) <> 0 ) then + begin + if ( event.active.gain = 0 ) then + isActive := false + else + isActive := true; + end; + end; + SDL_VIDEORESIZE: + begin + // handle resize event + {$IFDEF UNIX} + surface := SDL_SetVideoMode( event.resize.w, + event.resize.h, + 16, videoFlags ); + if ( surface = nil ) then + begin + writeln( ErrOutput, 'Could not get a surface after resize: ' + SDL_GetError( ) ); + Quit( 1 ); + end; + {$ENDIF} + resizeWindow( event.resize.w, event.resize.h ); + end; + SDL_KEYDOWN: + begin + // handle key presses + handleKeyPress( @event.key.keysym ); + end; + SDL_QUITEV: + begin + // handle quit requests + done := true; + end; + end; + end; + + // draw the scene + if ( isActive ) then + drawGLScene( ); + end; + + // clean ourselves up and exit + Quit( 0 ); +end. |