Select

Advanced function

inline void Select() const;

Selects the Bitmap as the active texture of OpenGL.

If you use OpenLayer's functions only you won't need to call this as OpenLayer does it automatically for you. However if you wish to plug in your own OpenGL code you may find use for this function.

Notice that calling this function doesn't enable texture mapping if it was disabled. Check the Settings for how to enable texture mapping the way that OpenLayer also notices the change.

Examples

Bitmap myBmp( ... );

// Select the bitmap as the active texture //
myBmp.Select();


Other functions of the class Bitmap
Load
Loads the bitmap
Blit
Draws the Bitmap to the screen
BlitRotated
Draws the Bitmap to the screen rotated along a point
BlitStretched
Draws the Bitmap to the screen stretched to the specified size
BlitTransformed
Draws the Bitmap to the screen rotated and stretched
BlitDistorted
Draws the Bitmap to the screen with the given corner points
Width
Returns the width of the Bitmap
Height
Returns the height of the Bitmap
LoadListOfBitmaps
Loads a list of bitmaps from the disk
GetPixel
Returns the color value of a pixel
Destroy
Destroys the Bitmap
IsValid
Checks if the Bitmap was loaded correctly
Save
Saves the Bitmap to disk with the specified filename
CopyFromScreen
Copies a region of the game window to the Bitmap
GetMemoryBitmap
Returns a memory bitmap copy of (part of) the Bitmap
GetCollisionPoly
Returns the generated collision polygon for the Bitmap
SetDefaultPivot
Sets the default pivot point
GetDefaultPivot
Returns the default pivot point

Advanced functions

GetPixelPacked
Returns the color value of the specified pixel in a packed integer
SendToGPU
Sends the Bitmap to the graphics card
UnloadFromGPU
Unloads the Bitmap from the graphics card
Select
Selects the Bitmap as the active texture of OpenGL
UseAutoDelete
Chooses the Bitmap to be automatically deleted when the program quits
HasAlphaChannel
Checks if the Bitmap has an alpha channel
StartFastBlitting
This function should be called right before using FastBlit
FastBlit
A faster version of Blit
FinishFastBlitting
This function should be called after calling FastBlit
UnloadToMemory
Unloads the Bitmap from the graphics card keeping the image data saved in the Bitmap
TexturedQuad
Outputs a raw textured quad to the video card


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