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displaying_20a_20png_20or_20tiff_20image
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displaying_20a_20png_20or_20tiff_20image [2018/03/31 13:19] 127.0.0.1 external edit |
displaying_20a_20png_20or_20tiff_20image [2018/04/13 15:30] (current) richardrussell Added syntax highlighting |
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| =====Displaying a PNG or TIFF image===== | =====Displaying a PNG or TIFF image===== | ||
| - | //by Richard Russell, November 2010, amended January 2012//\\ \\ BBC BASIC for Windows provides the [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwin8.html#display|*DISPLAY]] command to display on the screen an image contained in a **BMP** file, and the main [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwine.html#gifjpeg|Help documentation]] describes how to display a **GIF** or **JPEG** image. If you want to display a **PNG** or **TIFF** image you can use the code listed below:\\ \\ | + | //by Richard Russell, November 2010, amended January 2012//\\ \\ BBC BASIC for Windows provides the [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwin8.html#display|*DISPLAY]] command to display on the screen an image contained in a **BMP** file, and the main [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwine.html#gifjpeg|Help documentation]] describes how to display a **GIF** or **JPEG** image. If you want to display a **PNG** or **TIFF** image you can use the code listed below: |
| + | |||
| + | <code bb4w> | ||
| DEF PROCdisplay(pic$, xpos%, ypos%, xsize%, ysize%) | DEF PROCdisplay(pic$, xpos%, ypos%, xsize%, ysize%) | ||
| LOCAL tSI{}, pic%, gdip%, image%, ix%, iy%, gfx%, lGDIP% | LOCAL tSI{}, pic%, gdip%, image%, ix%, iy%, gfx%, lGDIP% | ||
| Line 50: | Line 52: | ||
| SYS "UpdateWindow", @hwnd% | SYS "UpdateWindow", @hwnd% | ||
| ENDPROC | ENDPROC | ||
| + | </code> | ||
| + | |||
| The parameters are the path/filename of the image file, and the required position and size of the displayed image (measured in pixels from the top left-hand corner of the output window's client area).\\ \\ This code will also display **BMP**, **GIF** and **JPEG** images, and may do so with a better quality than the other methods. However it relies on the presence of the //GDI Plus// library so will work only on Windows XP (or later) or if you have specifically installed **GDIPLUS.DLL** on the target computer. Microsoft permits you to redistribute this file so you can include it with your program if necessary. | The parameters are the path/filename of the image file, and the required position and size of the displayed image (measured in pixels from the top left-hand corner of the output window's client area).\\ \\ This code will also display **BMP**, **GIF** and **JPEG** images, and may do so with a better quality than the other methods. However it relies on the presence of the //GDI Plus// library so will work only on Windows XP (or later) or if you have specifically installed **GDIPLUS.DLL** on the target computer. Microsoft permits you to redistribute this file so you can include it with your program if necessary. | ||
displaying_20a_20png_20or_20tiff_20image.1522502356.txt.gz · Last modified: 2018/03/31 13:19 by 127.0.0.1
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