Aura

VESA Graphics (vesa.asm)

_CheckVESA

Inputs: None
Outputs: AL=1 if VESA mode not available

Checks to see if VESA is available, and if so, if a proper 32-bit mode is available.

_SetVESA

Inputs: None
Outputs: es=VESA_Selector, AL=1 if unable to get memory mappings

Puts the graphics card into the detected VESA mode. Assumes that _CheckVESA has been called to determine VESA availability. Performs the necessary memory mappings to access video graphics RAM directly.

_UnsetVESA

Inputs: None
Outputs: es invalid if still set to VESA_Selector

Goes into the most basic VESA mode.

_WritePixelVESA

Inputs: (X,Y)=location of pixel to plot; Color=32-bit xRGB color
Outputs: None

Assumes that es=VESA_Selector. Plots a pixel on the graphics display.

_ReadPixelVESA

Inputs: (X,Y)=location of pixel to read
Outputs: EAX=pixel color

Assumes that es=VESA_Selector. Gets the color of a pixel on the display.

_FillRectangleVESA

Inputs: (StartX,StartY)-(EndX,EndY)=Rectangle to fill; Color=color to fill the rectangle with
Outputs: None

Assumes that es=VESA_Selector. Fills a rectangle with the specified color on the given page.