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Revision as of 00:42, 27 February 2011 by imported>Clippy
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The _LOADIMAGE function loads an image into memory and returns an image handle for a graphic file image.


handle& = _LOADIMAGE& (filename$[, mode&])


  • File types supported: BMP, JPG, PNG, GIF, PNM, XPM, XCF, PCX, TIF, LBM, and TGA. A path can also be given.
  • The Mode& can designate 256(8 bit) or 32 bit color. Omit to use the current screen settings.
  • Some images may not load when a mode value is designated. Try loading it without a mode designation.
  • Loaded images can be read invisibly using POINT. Image coordinates start at 0 up to the _WIDTH - 1 and _HEIGHT - 1.
  • Images can be made into a program SCREEN or page adopting the size and palette settings or placed using _PUTIMAGE.
  • When you are in SCREEN 0 a mode& must be designated. When loading an _ICON use 32 for the mode.
  • Returns -1 as an invalid handle if it could not load the image. Valid LONG handle returns are less than -1.
  • Valid images only need to be loaded ONCE! The handle can be used repeatedly until freed.
  • It is IMPORTANT to free unused or discarded images with _FREEIMAGE to prevent CPU memory overflow errors!


Example 1: Already in SCREEN 13 and want computer to match the 32-bit jpg/etc. colors to the current palette:

SCREEN 13 i& = _LOADIMAGE("mypic.jpg") _PUTIMAGE, i&

Example 2: Already in SCREEN 13 but want to load an 8-bit image and adopt its palette as the current palette:

SCREEN 13 i& = _LOADIMAGE("mypic256col.bmp", 256) _COPYPALETTE i&, 0 _PUTIMAGE, i&

Example 3: Want to display an image in 32-bit color using its resolution as a program screen:

i& = _LOADIMAGE("mypic.jpg", 32) SCREEN i&

Example 4: Rotating an image 360 degrees using DRAW and Turn Angle.

SCREEN _NEWIMAGE(800, 600, 32) img& = _LOADIMAGE("QB64bee.PNG") wide% = _WIDTH(img&): deep% = _HEIGHT(img&) TLC$ = "BL" + STR$(wide% \ 2) + "BU" + STR$(deep% \ 2) RET$ = "BD BL" + STR$(wide%) _SOURCE img& _DEST 0 DO FOR angle% = 0 TO 360 STEP 15 CLS DRAW "BM400, 300" + "TA=" + VARPTR$(angle%) + TLC$ FOR y = 0 TO deep% - 1 FOR x = 0 TO wide% - 1 DRAW "C" + STR$(POINT(x, y)) + " R1" NEXT DRAW RET$ NEXT _DISPLAY NEXT LOOP UNTIL INKEY$ > ""

Code by Ted Weissgerber
NOTE: The QB64.PNG file picturing the QB64 bee can saved from the top of the QB64 forum.

See Examples:

  • SAVEIMAGE (QB64 Image to Bitmap SUB by Galleon)

See also

Go to Keyword Reference - Alphabetical
Go to Keyword Reference - By usage
Go to Main WIKI Page