device context

Although these functions are considered to be part of GDI, unlike most GDI functions they do not require a handle to a device context.

For a video display, a device context is usually associated with a particular window on the display.

Specifies the origin for the next brush selected into a device context.

The device context (also called simply the "DC" ) is really just a data structure maintained internally by GDI.

Transforms any curves in the path selected into the current device context, and turns each curve into a sequence of lines.

Determines whether the device context is being used for printing.

Object that represents the device context for the surface.

Initializes a brush with a specified solid color. The brush can subsequently be selected as the current brush for any device context.

instead, it sets the attribute of the device context known as the "current position. "

Computes the width and height of a line of text on the attribute device context using the current font to determine the dimensions .

Because the bitmap is compatible with the device, a memory DC is also sometimes referred to as a compatible device context.

That points to the device context to which to write the contents of the graphics buffer.

Only one device context per surface can be returned at a time.

When a memory device context is created , GDI automatically selects a monochrome stock bitmap for it .

Determines whether the given point is within the clipping region of the device context.

This method causes an implicit lock; do not retain the device context for later use.

The device context contains many "attributes" that determine how the GDI functions work on the device.

Sets the limit for the length of miter joins for the device context.

Provides the size, in pixels, of the specified text drawn with the specified font in the specified device context.

Draws the specified text within the specified bounds using the specified device context, font, color, and formatting instructions.

Controls the accumulation of bounding-rectangle information for the specified device context.

Computes the width and height of a character string on the attribute device context.

Defines methods for obtaining and releasing an existing handle to a Windows device context.

Retrieves the widths of individual characters in a consecutive group of characters from the current font using the output device context.

Initializes a brush color. The brush can subsequently be selected as the current brush for any device context.

Parameter must contain a handle to a device context in which a font is selected.

Computes the width and height of a character string on the output device context.

Class from the specified device context, bounded by the specified rectangle that uses the supplied unit of measure.

Returns the current accumulated bounding rectangle for the specified device context.

When a device context is outstanding on a surface, the application cannot call the following methods.

Windows applications generally use two methods for getting a device context handle in preparation for painting the screen.

In the default device context, the current position is initially set to the point (0, 0).

Copies a bitmap with transparent color from the source device context to this current device context.

Releases a device context handle obtained by a previous call to the GetHdc method of this Graphics.

Draws the specified text within the specified bounds using the specified device context, font, color, and back color.

Closes a path bracket and selects the path defined by the bracket into the device context.

The colors of the source area are merged with the colors of the selected brush of the destination device context using the Boolean.

A Graphics is associated with a specific device context.

Call this member function to draw the current window in the specified device context, which is most commonly in a printer device context.

Draws the specified text within the specified bounds, using the specified device context, font, and color.

The font for the specified device context is not a TrueType font.

The current pen selected in the device context is considered an attribute of the device context.

The brush currently selected in the destination device context is copied to the destination bitmap.

And sets it to the handle to the device context of the graphics object of the form.

GDI output functions can be used with a memory device context only if a bitmap has been created and selected into that context.

PDC Identifies the device context to be released.

To a device context to match the pixel format of the new buffer to.

Representing the handle of a device context.

When a memory device context is created, GDI automatically selects a 1-by-1 monochrome stock bitmap for it.

Saves the current state of the device context.

As in any drawing function, the first argument is a handle to a device context.

Create a memory device context which has the same attribute as the device context we just obtained.

Next you obtain the handle to the device context of the area you want to paint the bitmap on.

Enumerates the pens and brushes available in a device context.

Retrieves the metrics for the current font from the attribute device context.

A device context defines the graphics object for drawing on a Windows-based device.

Copies a bitmap from the source device context to this current device context.

From the specified handle to a device context and handle to a device.

Besides this you can acquire frames for AVI writing from image stream, Windows device context, and standard IPicture interface.

From the specified Windows handle to a device context.

Creates a device context for a specific device.

Retrieves the color adjustment values for the device context.

Do not delete a brush that is currently selected in a device context.

The TEXTMETRIC structure provides various types of information about the font currently selected in the device context.

Retrieves the metrics for the current font from the output device context.

Draws the specified text at the specified location, using the specified device context, color, and font.

Draws any window in the specified device context (usually a printer device context).

Method will draw the text in the font or color currently selected in the device context specified by.

Includes a state block in the device context.

Returns the handle to a Windows device context.

Before we begin drawing, let's examine the device context with more rigor than we did in Chapter.

Returns the current arc direction for the device context.

From the specified handle to a device context.

Later on, you deselect the pen object from the device context and destroy the object.

To use this pen, you "select" the pen handle into the device context.

Sets the color adjustment values for the device context using the specified values.

Gets the handle to the device context associated with this.

Which specifies the device context of the device.

Don't delete GDI objects while they are selected in a valid device context.

A device context is associated with a particular display device, such as a video display or a printer.

Retrieves the device context into which the current bitmap is selected.

Releases the device context obtained by calling.

Later in this chapter, we'll look at the DEVCAPS1 program, which obtains other, more general, device context information.

For the specified device context and device.

Draws the current window in the specified device context.

For all Set functions, there are Get functions that let you obtain the current device context attributes.

With that device context handle you are free to paint your client area and make it as beautiful or as ugly as you like.

For the specified device context.

before we begin drawing, lets examine the device context with more rigor than we did in chapter 4.

Handle to a device context (DC).

Copies a bitmap from a specified device context.

Invalid device context (DC) handle.

Creates a memory-device context that is compatible with another device context. You can use it to prepare images in memory.

The device context in which to draw the text.

PDC A pointer to a device context.

Releases the handle to the device context.

Returns the window associated with the display device context.

Retrieves the character kerning pairs for the font that is currently selected in the specified device context.

Closes and discards any paths in the device context.

GDI draws lines using the current pen selected in the device context.

Opens a path bracket in the device context.

Save any device context that will be lost during a period of low power.

These are all attributes that are part of the device context.

Sets the window origin of the device context.

The device context handle is your window's passport to the GDI functions.

When we are through with the font, we should restore the old font back into the device context.

If a brush is used, it is the selected brush in the destination device context.

Create a device context compatible with the current window

From MSDN The DrawText function uses the device context's selected font, text color, and background color to draw the text. DrawText

Handle to a device context

Getting a Device Context Handle

A Windows program can also obtain a handle to a device context that applies to the entire window and not only to the window's client area