Description

This is the graphics base class and also includes the software rendering engine.

Software rendering engine notes

In 16bpp mode, the alpha channel is not updated with pixel/block copy operations, with the exception of the fill() procedure, for speed. Therefore, you can only rely on the alpha channel and masking/alpha functions in the following cases:

the surface was created by a tlximgloader
the surface has had fill() used on the entire surface with a solid alpha value ($FF), edited, then maketransparent() has been used
alpha bytes manually manipulated (unlikely)
makemask() has been used after any drawing on this surface

Descendants (rendering engines)

lxgfxwrap
lxgfxdirectdraw
lxgfxdirect3d
lxgfxopengl

Fields

initdone: boolean;
engine: string;
pixelsize, pixelshift: longint;
mask_a, mask_r, mask_g, mask_b: longint;
shift_a, shift_r, shift_g, shift_b: longint;
primarysurface: tlxhandle;

Callbacks

cb_lostsurfaces: procedure(lxgfx: tlxgfx) of object;
cb_afterbeginframe: procedure(lxgfx: tlxgfx) of object;
cb_beforeendframe: procedure(lxgfx: tlxgfx) of object;

Methods

Initialisation / shutdown

Display mode

Surface handling

Frame / output

Drawing primitives

Surface drawing / masking

Utility / conversion

Clipping

True type font output

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