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| author | scuri <scuri> | 2008-10-17 06:10:33 +0000 |
|---|---|---|
| committer | scuri <scuri> | 2008-10-17 06:10:33 +0000 |
| commit | 7b52cc13af4e85f1ca2deb6b6c77de9c95ea0dcf (patch) | |
| tree | d0857278bde2eff784227c57dcaf930346ceb7ac /html/en/samples.html | |
First commit - moving from LuaForge to SourceForge
Diffstat (limited to 'html/en/samples.html')
| -rw-r--r-- | html/en/samples.html | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/html/en/samples.html b/html/en/samples.html new file mode 100644 index 0000000..1759ddc --- /dev/null +++ b/html/en/samples.html @@ -0,0 +1,99 @@ +<html> + +<head> +<meta http-equiv="Content-Language" content="en-us"> +<title>Samples</title> +<link rel="stylesheet" type="text/css" href="../style.css"> +</head> + +<body> + +<h1>Samples</h1> +<h3><a name="Simple Draw">Simple Draw</a></h3> + + <p>This is an example of a simple drawing program using a IUP canvas: </p> + + + + <pre>cdCanvas* canvas = cdCreateCanvas(CD_NATIVEWINDOW, IupGetAttribute(IupCanvas,"CONID")); <br>cdCanvasLineStyle(canvas, CD_DASHED);<br>cdCanvasLine(canvas, 0, 0, 100, 100);<br>cdCanvasKillCanvas(canvas);</pre> + + + + <p>If you want to use <a name="World Coordinates"><strong>World Coordinates</strong></a>: </p> + + + + <pre>cdCanvas* canvas = cdCreateCanvas(CD_NATIVEWINDOW, IupGetAttribute(IupCanvas,"CONID")); <br>wdCanvasViewport(canvas, 0, 100, 0, 100); <br>wdCanvasWindow(canvas, -1.5, 1.5, -3000, 3000); <br>cdCanvasLineStyle(canvas, CD_DASHED); <br>wdCanvasLine(canvas, -0.5, -500, 1.0, 1000); <br>cdKillCanvas(canvas);<code> </code></pre> + + +<h3><a name="Off Screen Drawing">Off Screen Drawing</a> (Double Buffering) </h3> + + <p>To draw in the background and later on transfer the drawing to the screen, use: </p> + + + + <pre>cdCanvas* canvas = cdCreateCanvas(CD_NATIVEWINDOW, IupGetAttribute(IupCanvas,"CONID")); <br>cdCanvas* db_canvas = cdCreateCanvas(CD_DBUFFER, canvas); cdCanvasActivate(db_canvas); // update canvas size, window could be resized<br>cdCanvasLineStyle(db_canvas, CD_DASHED); <br>cdCanvasLine(db_canvas, 10, 10, 50, 50); <br>cdCanvasFlush(db_canvas); // swap to the window canvas <br>cdKillCanvas(db_canvas); <br>cdKillCanvas(canvas); </pre> + + <p>To draw in a RGB image, use:</p> + + <pre><code>cdCanvas* canvas = cdCreateCanvasf(CD_IMAGERGB, "%dx%d", width, height); +</code>cd<code>Canvas</code>LineStyle(<code>canvas, </code>CD_DASHED); +cd<code>Canvas</code>Line(<code>canvas, </code>10, 10, 50, 50); +unsigned char* red = cdCanvasGetAttribute(canvas, "REDIMAGE"); +// do something with the raw image data +cdKillCanvas(canvas); +</pre> + + +<h3>Lua Samples</h3> + + <p>To draw in a RGB image in CDLua for Lua 5:</p> + + <pre>bitmap = cd.CreateBitmap(200,200,cd.RGB) +canvas = cd.CreateCanvas(cd.IMAGERGB, bitmap) +canvas:Font("Times", cd.BOLD, 12) +canvas:Text(10, 10, "Test") +canvas:KillCanvas()</pre> + + <p>Check the file <a href="../download/samples_cdlua5.zip">samples_cdlua5.zip</a> or <a href="../download/samples_cdlua5.tar.gz">samples_cdlua5.tar.gz</a> for several samples in Lua. + For some of them you will need also the IUP libraries. </p> + +<h3>Screen Capture in Windows</h3> + + <p>Using a NULL parameter to the NATIVEWINDOW driver you can get access to the entire screen:</p> + + <pre>cdCanvas *canvas = cdCreateCanvas(CD_NATIVEWINDOW, NULL); +cdCanvasGetSize(canvas, &width, &height, NULL, NULL); +// allocate red, green and blue pointers +cdCanvasGetImageRGB(canvas, red, green, blue, 0, 0, width, height); +cdKillCanvas(canvas);</pre> + + +<h3>Generating an EMF file that contains an IM Image in Lua</h3> + +<pre> +image = im.FileImageLoadBitmap(image_filename) +canvas = cd.CreateCanvas(cd.EMF,emf_filename.." "..image:Width().."x"..image:Height()) +image:cdCanvasPutImageRect(canvas,0,0,0,0) +cd.KillCanvas(canvas) +</pre> + + +<h3><a name="Complete Example">Complete Example</a></h3> + + <p>We have created an application called Simple Draw that illustrates the use of all functions in the CD library + (including WD). You can see the source code in the <a href="../download/simple.c">simple.c</a> file, or take the file + <a href="../download/simple.zip">simple.zip</a> for a complete set of files including makefiles for all platforms. + Extract the files creating subfolders, using parameter "<font face="Courier New">-d</font>".</p> + +<h3>Example for Tests</h3> + + <p>The <a href="../download/cdtest.zip">CDTEST</a> example is actually one of the applications used to test virtually + all functions of the CD library. Its interface uses the IUP library, and it can run in several platforms. You can take + either the .EXE files or the source code. Extract the files creating subfolders, using parameter "<font face="Courier New">-d</font>". + Warning: This application is not didactic. </p> + + +</body> + +</html> |