Graphics.DrawImage(Image*, const Point*, INT, INT, INT, INT, INT, Unit, ImageAttributes*, DrawImageAbort, VOID*) method
Applies to: desktop apps only
The Graphics::DrawImage method draws an image.
Syntax
Status DrawImage(
[in] Image *image,
[in] const Point *destPoints,
[in] INT count,
[in] INT srcx,
[in] INT srcy,
[in] INT srcwidth,
[in] INT srcheight,
[in] Unit srcUnit,
[in] ImageAttributes *imageAttributes,
[in] DrawImageAbort callback,
[in] VOID *callbackData
);
Parameters
image [in]
Type: Image*Pointer to an Image object that specifies the source image.
destPoints [in]
Type: const Point*Pointer to an array of Point objects that specify the area, in a parallelogram, in which to draw the image.
count [in]
Type: INTInteger that specifies the number of elements in the destPoints array.
srcx [in]
Type: INTReal number that specifies the x-coordinate of the upper-left corner of the portion of the source image to be drawn.
srcy [in]
Type: INTReal number that specifies the y-coordinate of the upper-left corner of the portion of the source image to be drawn.
srcwidth [in]
Type: INTReal number that specifies the width of the portion of the source image to be drawn.
srcheight [in]
Type: INTReal number that specifies the height of the portion of the source image to be drawn.
srcUnit [in]
Type: UnitElement of the Unit enumeration that specifies the unit of measure for the image. The default value is UnitPixel.
imageAttributes [in]
Type: ImageAttributes*Pointer to an ImageAttributes object that specifies the color and size attributes of the image to be drawn. The default value is NULL.
callback [in]
Type: DrawImageAbortCallback method used to cancel the drawing in progress. The default value is NULL.
callbackData [in]
Type: VOID*Pointer to additional data used by the method specified by the callback parameter. The default value is NULL.
Return value
Type:
Type: Status****
If the method succeeds, it returns Ok, which is an element of the Status enumeration.
If the method fails, it returns one of the other elements of the Status enumeration.
Remarks
The value of the count parameter must equal 3 to specify the three corners of the parallelogram. The fourth corner of the parallelogram is calculated using the vectors of the first and second coordinates and the first and third coordinates. The portion of the source image to be drawn is scaled to fit the parallelogram.
Examples
The following example draws the original source image and then draws a portion of the image in a specified parallelogram.
VOID Example_DrawImage2(HDC hdc)
{
Graphics graphics(hdc);
// Create an Image object.
Image image(L"pattern.png");
// Draw the original source image.
graphics.DrawImage(&image, 10, 10);
// Define the portion of the image to draw.
int srcX = 70;
int srcY = 20;
int srcWidth = 100;
int srcHeight = 100;
// Create an array of Point objects that specify the destination of the cropped image.
Point destPoints[3] = {
Point(230, 30),
Point(350, 50),
Point(275, 120)};
Point* pdestPoints = destPoints;
// Create an ImageAttributes object that specifies a recoloring from red to blue.
ImageAttributes remapAttributes;
ColorMap redToBlue;
redToBlue.oldColor = Color(255, 255, 0, 0);
redToBlue.newColor = Color(255, 0, 0, 255);
remapAttributes.SetRemapTable(1, &redToBlue);
// Draw the cropped image.
graphics.DrawImage(
&image,
pdestPoints,
3,
srcX,
srcY,
srcWidth,
srcHeight,
UnitPixel,
&remapAttributes,
NULL,
NULL);
}
The following illustration shows the output of the preceding code.
.png)
Requirements
Minimum supported client |
Windows XP, Windows 2000 Professional |
Minimum supported server |
Windows 2000 Server |
Product |
GDI+ 1.0 |
Header |
Gdiplusgraphics.h (include Gdiplus.h) |
Library |
Gdiplus.lib |
DLL |
Gdiplus.dll |
See also
Loading and Displaying Bitmaps
Drawing, Positioning, and Cloning Images
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Build date: 3/6/2012