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GDI Support Services (Windows Embedded CE 6.0)

1/6/2010

The GDI provides some services to support display drivers as predefined structures. The structures interact both with associated functions and with a few stand-alone C functions.

Predefined structures support brushes, palettes, translations, clipping regions, and stroke and fill paths.

Stand-alone C functions support device bitmaps and surfaces.

The following table shows the structures and functions.

Structure or function Description

BRUSHOBJ

Represents a brush that is used for solid or patterned stroke and fill operations.

BRUSHOBJ_pvAllocRbrush

Allocates memory for a brush.

BRUSHOBJ_pvGetRbrush

Retrieves a pointer to the specified brush.

CLIPOBJ

Represents a clipping region.

CLIPOBJ_bEnum

Enumerates clipping rectangles from a clipping region.

CLIPOBJ_cEnumStart

Sets parameters for enumerating the rectangles in a clipping region.

EngCreateDeviceBitmap

Causes the GDI to create a handle for a device bitmap file.

EngCreateDeviceSurface

Causes the GDI to create a device surface that the display driver manages.

EngDeleteSurface

Informs the GDI that the display driver no longer needs a device surface.

PALOBJ_cGetColors

Copies colors to a palette.

PATHDATA

Stores portions of a drawing path.

PATHOBJ_bEnum

Enumerates PATHDATA records from a drawing path.

PATHOBJ_vEnumStart

Prepares a drawing path to have its component line segments enumerated.

PATHOBJ_vGetBounds

Returns the bounding rectangle for a drawing path.

XLATEOBJ

Translates colors from one palette to another.

XLATEOBJ_cGetPalette

Retrieves colors from an indexed palette.

See Also

Reference

BitBlT Emulation Library Functions

Concepts

Display Driver Development Concepts
Display Driver Extensions
Display Driver Samples
Primary Display Drivers
Secondary Display Drivers
DDI Functions
GPE Base Classes
Display Buffer Formats
Line Drawing
Display Driver Escape Codes
Display Drivers and the Run-Time Image

Other Resources

Display Drivers