BITMAP and blitting operations

Example: More...

Data Structures
struct	_STRETCH_EXTRA_INFO

Typedefs
typedef struct _STRETCH_EXTRA_INFO	STRETCH_EXTRA_INFO

Enumerations
enum	ColorBlendMethod { ,   COLOR_BLEND_PD_CLEAR = 0x0100, COLOR_BLEND_PD_SRC = 0x0101, COLOR_BLEND_PD_DST = 0x0102, COLOR_BLEND_PD_SRC_OVER = 0x0103,   COLOR_BLEND_PD_DST_OVER = 0x0104, COLOR_BLEND_PD_SRC_IN = 0x0105, COLOR_BLEND_PD_DST_IN = 0x0106, COLOR_BLEND_PD_SRC_OUT = 0x0107,   COLOR_BLEND_PD_DST_OUT = 0x0108, COLOR_BLEND_PD_SRC_ATOP = 0x0109, COLOR_BLEND_PD_DST_ATOP = 0x010a, COLOR_BLEND_PD_XOR = 0x010b,   COLOR_BLEND_PD_PLUS = 0x010c, COLOR_BLEND_PD_MODULATE = 0x010d , COLOR_BLEND_SP_NORMAL = 0x0801, COLOR_BLEND_SP_MULTIPLY = 0x0830,   COLOR_BLEND_SP_SCREEN = 0x0831, COLOR_BLEND_SP_OVERLAY = 0x0832, COLOR_BLEND_SP_DARKEN = 0x0833, COLOR_BLEND_SP_LIGHTEN = 0x0834,   COLOR_BLEND_SP_COLOR_DODGE = 0x0835, COLOR_BLEND_SP_COLOR_BURN = 0x0836, COLOR_BLEND_SP_HARD_LIGHT = 0x0837, COLOR_BLEND_SP_SOFT_LIGHT = 0x0838,   COLOR_BLEND_SP_DIFFERENCE = 0x0839, COLOR_BLEND_SP_EXCLUSION = 0x083a , COLOR_BLEND_NS_HUE = 0x103b, COLOR_BLEND_NS_SATURATION = 0x103c,   COLOR_BLEND_NS_COLOR = 0x103d, COLOR_BLEND_NS_LUMINOSITY = 0x103e }
enum	ColorLogicalOp
enum	ScalingFilter {   SCALING_FILTER_FAST = 0x00000000, SCALING_FILTER_GOOD = 0x00010000, SCALING_FILTER_BEST = 0x00020000, SCALING_FILTER_NEAREST = 0x00020000,   SCALING_FILTER_BILINEAR = 0x00040000, SCALING_FILTER_CONVOLUTION = 0x00050000 }

Functions
MG_EXPORT BOOL GUIAPI	GetBitmapFromDC (HDC hdc, int x, int y, int w, int h, BITMAP *bmp)
	Get image box on a DC and saves it into a BITMAP object. More...
MG_EXPORT BOOL GUIAPI	FillBoxWithBitmap (HDC hdc, int x, int y, int w, int h, const BITMAP *bmp)
	Fills a box with a BITMAP object. More...
MG_EXPORT BOOL GUIAPI	FillBoxWithBitmapPart (HDC hdc, int x, int y, int w, int h, int bw, int bh, const BITMAP *bmp, int xo, int yo)
	Fills a box with a part of a bitmap oject. More...
MG_EXPORT BOOL GUIAPI	FillBitmapPartInBox (HDC hdc, int box_x, int box_y, int box_w, int box_h, const BITMAP *pbmp, int bmp_x, int bmp_y, int bmp_w, int bmp_h)
	Fills a part of bitmap into a box, and the parts bitmap will be scaled if needed. More...
MG_EXPORT void GUIAPI	BitBlt (HDC hsdc, int sx, int sy, int sw, int sh, HDC hddc, int dx, int dy, DWORD dwRop)
	Performs a bit-block transfer from a device context into another device context. More...
static void GUIAPI	StretchBlt (HDC hsdc, int sx, int sy, int sw, int sh, HDC hddc, int dx, int dy, int dw, int dh, DWORD dwRop)
	Copies a bitmap from a source rectangle into a destination rectangle, streches the bitmap if necessary. More...
MG_EXPORT BOOL GUIAPI	ScaleBitmapEx (BITMAP *dst, const BITMAP *src, HDC ref_dc)
	Scales a BITMAP object into another BITMAP object by specify algorithm. More...
MG_EXPORT gal_pixel GUIAPI	GetPixelInBitmapEx (const BITMAP *bmp, int x, int y, Uint8 *alpha)
	Returns the pixel value in a BITMAP object. More...
static gal_pixel GUIAPI	GetPixelInBitmap (const BITMAP *bmp, int x, int y)
	Returns the pixel value in a BITMAP object. More...
static BOOL GUIAPI	SetPixelInBitmap (const BITMAP *bmp, int x, int y, gal_pixel pixel)
	Set pixel value in a BITMAP object. More...
MG_EXPORT BOOL GUIAPI	SaveScreenRectContent (const RECT *rcWin, const char *filename)
	Saves content of a rectangle in the screen to a file. More...
MG_EXPORT BOOL GUIAPI	SaveMainWindowContent (HWND hWnd, const char *filename)
	Saves content of a main window to a file. More...

Detailed Description

Example:

{
    int tox = 800, toy = 800;
    int count;
    BITMAP bitmap;
    unsigned int start_tick, end_tick;
 
    /* Load the bitmap from the file. */
    if (LoadBitmap (hdc, &bitmap, "res/icon.bmp"))
        return;
 
    bitmap.bmType = BMP_TYPE_ALPHACHANNEL;
 
    /* Fill a box with the bitmap with alpha channel. */
    start_tick = GetTickCount ();
    count = 1000;
    while (count--) {
        tox = rand() % 800;
        toy = rand() % 800;
 
        /* Set a random alpha channel. */
        bitmap.bmAlpha = rand() % 256;
        /* Fill the box. */
        FillBoxWithBitmap (hdc, tox, toy, 0, 0, &bitmap);
    }
    end_tick = GetTickCount ();
    TellSpeed (hwnd, start_tick, end_tick, "Alpha Blended Bitmap", 1000);
 
    bitmap.bmType = BMP_TYPE_ALPHACHANNEL | BMP_TYPE_COLORKEY;
    /* Set the color key (the transparent pixel) of the bitmap. */
    bitmap.bmColorKey = GetPixelInBitmap (&bitmap, 0, 0);
 
    /* Fill a box with the bitmap with alpha channel and color key. */
    start_tick = GetTickCount ();
    count = 1000;
    while (count--) {
        tox = rand() % 800;
        toy = rand() % 800;
 
        /* Set a random alpha channel. */
        bitmap.bmAlpha = rand() % 256;
        /* Fill the box. */
        FillBoxWithBitmap (hdc, tox, toy, 0, 0, &bitmap);
    }
    end_tick = GetTickCount ();
    TellSpeed (hwnd, start_tick, end_tick, "Alpha Blended Transparent Bitmap", 1000);
 
    UnloadBitmap (&bitmap);
}
 
{
    /* Create a memory DC which hanve alpha per-pixel. */
    mem_dc = CreateMemDC (400, 100, 16, MEMDC_FLAG_HWSURFACE | MEMDC_FLAG_SRCALPHA,
                    0x0000F000, 0x00000F00, 0x000000F0, 0x0000000F);
 
    /* Set brush color and fill a box. */
    SetBrushColor (mem_dc, RGBA2Pixel (mem_dc, 0xFF, 0xFF, 0x00, 0xFF));
    FillBox (mem_dc, 0, 0, 200, 50);
 
    /* Set another brush color and fill a box */
    SetBrushColor (mem_dc, RGBA2Pixel (mem_dc, 0xFF, 0xFF, 0x00, 0x40));
    FillBox (mem_dc, 200, 0, 200, 50);
 
    /* Set another brush color and fill a box */
    SetBrushColor (mem_dc, RGBA2Pixel (mem_dc, 0xFF, 0xFF, 0x00, 0x80));
    FillBox (mem_dc, 0, 50, 200, 50);
 
    /* Set another brush color and fill a box */
    SetBrushColor (mem_dc, RGBA2Pixel (mem_dc, 0xFF, 0xFF, 0x00, 0xC0));
    FillBox (mem_dc, 200, 50, 200, 50);
    SetBkMode (mem_dc, BM_TRANSPARENT);
 
    /* Set a text color and output the text */
    SetTextColor (mem_dc, RGBA2Pixel (mem_dc, 0x00, 0x00, 0x00, 0x80));
    TabbedTextOut (mem_dc, 0, 0, "Memory DC with alpha.\n"
                                 "The source DC have alpha per-pixel.");
 
    /* Blitting to a client DC. */
    start_tick = GetTickCount ();
    count = 100;
    while (count--) {
        BitBlt (mem_dc, 0, 0, 400, 100, hdc, rand () % 800, rand () % 800);
    }
    end_tick = GetTickCount ();
    TellSpeed (hwnd, start_tick, end_tick, "Alpha Blit", 100);
 
    /* delete the momory DC. */
    DeleteMemDC (mem_dc);
}

Typedef Documentation

STRETCH_EXTRA_INFO

typedef struct _STRETCH_EXTRA_INFO STRETCH_EXTRA_INFO

The stretch extra information for StretchBltEx.

See also

StretchBltEx

Enumeration Type Documentation

ColorBlendMethod

enum ColorBlendMethod

The color blend mothed.

See Compositing and Blending Level 1 Note: we define the same values with Pixman.

Enumerator
COLOR_BLEND_PD_CLEAR	Porter Duff rule: clear
COLOR_BLEND_PD_SRC	Porter Duff rule: source
COLOR_BLEND_PD_DST	Porter Duff rule: destination
COLOR_BLEND_PD_SRC_OVER	Porter Duff rule: source over destination
COLOR_BLEND_PD_DST_OVER	Porter Duff rule: destination over source
COLOR_BLEND_PD_SRC_IN	Porter Duff rule: souorce in destination
COLOR_BLEND_PD_DST_IN	Porter Duff rule: destination in souorce
COLOR_BLEND_PD_SRC_OUT	Porter Duff rule: source held out by destination
COLOR_BLEND_PD_DST_OUT	Porter Duff rule: destination held out by source
COLOR_BLEND_PD_SRC_ATOP	Porter Duff rule: source atop destination
COLOR_BLEND_PD_DST_ATOP	Porter Duff rule: destination atop source
COLOR_BLEND_PD_XOR	Porter Duff rule: source xor destination
COLOR_BLEND_PD_PLUS	Porter Duff rule: plus
COLOR_BLEND_PD_MODULATE	Porter Duff rule: modulate
COLOR_BLEND_SP_NORMAL	Separable blend mode: normal The blending formula simply selects the source color.
COLOR_BLEND_SP_MULTIPLY	Separable blend mode: multiply Darkens by multiplying colors: Sc·Dc.
COLOR_BLEND_SP_SCREEN	Separable blend mode: screen Complements product of complements: Sc + Dc - Sc·Dc.
COLOR_BLEND_SP_OVERLAY	Separable blend mode: overlay Inverse of hard-light.
COLOR_BLEND_SP_DARKEN	Separable blend mode: darken Minimum of colors: min(Sc, Dc).
COLOR_BLEND_SP_LIGHTEN	Separable blend mode: lighten Maximum of colors: max(Sc, Dc).
COLOR_BLEND_SP_COLOR_DODGE	Separable blend mode: color-dodge Brightens destination based on source.
COLOR_BLEND_SP_COLOR_BURN	Separable blend mode: color-burn Darkens destination based on source.
COLOR_BLEND_SP_HARD_LIGHT	Separable blend mode: hard-light Similar to effect of harsh spotlight.
COLOR_BLEND_SP_SOFT_LIGHT	Separable blend mode: soft-light Similar to effect of soft spotlight.
COLOR_BLEND_SP_DIFFERENCE	Separable blend mode: difference Subtracts the darker from the lighter: Abs(Dc - Sc).
COLOR_BLEND_SP_EXCLUSION	Separable blend mode: exclusion Similar to Difference but lower contrast.
COLOR_BLEND_NS_HUE	Non-Separable blend mode: hue Creates a color with the hue of the source color and the saturation and luminosity of the backdrop color.
COLOR_BLEND_NS_SATURATION	Non-Separable blend mode: saturation Creates a color with the saturation of the source color and the hue and luminosity of the backdrop color.
COLOR_BLEND_NS_COLOR	Non-Separable blend mode: color Creates a color with the hue and saturation of the source color and the luminosity of the backdrop color.
COLOR_BLEND_NS_LUMINOSITY	Non-Separable blend mode: luminosity Creates a color with the luminosity of the source color and the hue and saturation of the backdrop color.

Definition at line 5171 of file gdi.h.

ColorLogicalOp

enum ColorLogicalOp

The color logical operations.

Definition at line 5310 of file gdi.h.

ScalingFilter

enum ScalingFilter

The scaling filter for StretchBlt.

Enumerator
SCALING_FILTER_FAST	The fast filter (DDA scaler)
SCALING_FILTER_GOOD	The good filter
SCALING_FILTER_BEST	The best filter
SCALING_FILTER_NEAREST	The filter using nearest algorithm
SCALING_FILTER_BILINEAR	The filter using bi-linear algorithm
SCALING_FILTER_CONVOLUTION	The filter using convolution algorithm

Definition at line 5372 of file gdi.h.

Function Documentation

BitBlt()

void GUIAPI BitBlt	(	HDC	hsdc,
		int	sx,
		int	sy,
		int	sw,
		int	sh,
		HDC	hddc,
		int	dx,
		int	dy,
		DWORD	dwRop
	)

Performs a bit-block transfer from a device context into another device context.

This function performs a bit-block transfer of the color data cooresponding to a rectangle of pixels from the specified source device context hsdc into a destination device context hddc. (sx,sy,sw,sh) specifies the rectangle in the source DC, and (dx,dy) specifies the position of the rectangle in the destination DC. Note that the size of the two rectangles are identical.

Note that all coordinates should be in the device space.

Parameters

hsdc	The source device context.
sx	The x coordinate of the upper-left corner of the rectangle in the source DC.
sy	The y coordinate of the upper-left corner of the rectangle in the source DC.
sw	The width of the source rectangle.
sh	The height of the source rectangle.
hddc	The destination device context hddc.
dx	The x coordinate of the upper-left corner of the rectangle in the destination DC.
dy	The y coordinate of the upper-left corner of the rectangle in the destination DC.
dwRop	The color blending method, see ColorBlendMethod. This argument is only valid when Pixman is used.

Note

When the source color key is specified for the blitting operation, or the formats of the device contexts are not supported by Pixman, this function will use the legacy implementation. In this situation, the color blending method will be ignored.

See also

StretchBlt, SetMemDCAlpha, SetMemDCColorKey, ColorBlendMethod

FillBitmapPartInBox()

BOOL FillBitmapPartInBox	(	HDC	hdc,
		int	box_x,
		int	box_y,
		int	box_w,
		int	box_h,
		const BITMAP *	pbmp,
		int	bmp_x,
		int	bmp_y,
		int	bmp_w,
		int	bmp_h
	)

Fills a part of bitmap into a box, and the parts bitmap will be scaled if needed.

This function gives an intuitionistic way to use function FillBoxWidthBitmapPart.

Parameters

hdc	The target DC to show bitmap
box_x	The left of target box
box_y	The top of target box
box_w	The width of target box
box_h	The height of target box
pbmp	The bitmap which will be showed in the hdc
bmp_x	The visible part's left of bitmap
bmp_y	The visible part's top of bitmap
bmp_w	The visible part's width of bitmap
bmp_h	The visible part's height of bitmap

See also

FillBoxWidthBitmapPart

FillBoxWithBitmap()

BOOL GUIAPI FillBoxWithBitmap	(	HDC	hdc,
		int	x,
		int	y,
		int	w,
		int	h,
		const BITMAP *	bmp
	)

Fills a box with a BITMAP object.

This function fills a box with a BITMAP object pointed to by bmp. (x,y) is the upper-left corner of the box, and w, h are the width and the height of the box respectively.

This function will scale the bitmap when necessary; that is, when the width or the height of the box is not equal to the with or the height of the BITMAP object.

Parameters

hdc	The device context.
x	The x coordinate of the upper-left corner of the box.
y	The y coordinate of the upper-left corner of the box.
w	The width of the box. Can be zero, means the width or the height will be equal to the width or the height of the BITMAP object.
h	The height of the box. Can be zero, means the width or the height will be equal to the width or the height of the BITMAP object.
bmp	The pointer to the BITMAP object.

Returns

TRUE on success, otherwise FALSE.

Note

You can specify the alpha value or the color key of the BITMAP object, and the current raster operation was set by SetRasterOperation for the DC will override the alpha value of color key if ROP is not ROP_SET.

If the bitmap has BMP_TYPE_RLE, the target w and h will be ignored. That is, the scale of the bitmap is not supported for RLE encoded bitmap.

See also

FillBoxWithBitmapPart, GetBitmapFromDC, Bitmap file load/save operations

FillBoxWithBitmapPart()

BOOL GUIAPI FillBoxWithBitmapPart	(	HDC	hdc,
		int	x,
		int	y,
		int	w,
		int	h,
		int	bw,
		int	bh,
		const BITMAP *	bmp,
		int	xo,
		int	yo
	)

Fills a box with a part of a bitmap oject.

This function fills a box with a part of a bitmap object pointed to by bmp. (x,y) is the upper-left corner of the box, and w, h are the width and the height of the box respectively. (xo, yo) is the start position of the part box in the bitmap relative to upper-left corner of the bitmap, and bw, bh are the width and the height of the full bitmap expected.

If bw or bh is less than or equal to zero, this function will use the original width and height of the bitmap, else it will scale the BITMAP object when necessary; that is, when bw or bh is not equal to the width or the height of the BITMAP object.

Parameters

hdc	The device context.
x	The x coordinate of the upper-left corner of the box.
y	The y coordinate of the upper-left corner of the box.
w	The width of the box.
h	The height of the box.
bw	The width of the full bitmap expected. Can be zero, means the width or the height will be equal to the width or the height of the BITMAP object.
bh	The height of the full bitmap expected. Can be zero, means the width or the height will be equal to the width or the height of the BITMAP object.
xo	xo,yo: The start position of the part box in the bitmap relative to upper-left corner of the BITMAP object.
yo	xo,yo: The start position of the part box in the bitmap relative to upper-left corner of the BITMAP object.
bmp	The pointer to the BITMAP object.

Returns

TRUE on success, otherwise FALSE.

Note

1: You can specify the alpha value or the color key of the BITMAP object, and the current raster operation was set by SetRasterOperation for the DC will override the alpha value or the color key if ROP is not ROP_SET.

2: xo/yo must be greater zero and (xo + w) < bw, (yo + h) < bh. else with fill nothing.

3: xo/yo must be multiply scale factor when bitmap scaled.

4: if bw or bh is not equal to he width or the height of the BITMAP object, it will be scale bitmap, but fill box is also (0, 0, w,h).

The RLE encoded bitmap is not supported by this function so far.

See also

FillBoxWithBitmap, GetBitmapFromDC, Bitmap structure

GetBitmapFromDC()

BOOL GUIAPI GetBitmapFromDC	(	HDC	hdc,
		int	x,
		int	y,
		int	w,
		int	h,
		BITMAP *	bmp
	)

Get image box on a DC and saves it into a BITMAP object.

This function gets image box on the specified device context hdc, and saves the image bits into the BITMAP object pointed to by bmp. The image box begins at (x,y), and is w wide and h high. You must make sure that bmp->bits is big enough to store the image.

Parameters

hdc	The device context.
x	The x coordinate in pixels of upper-left corner of the image box.
y	The y coordinate in pixels of upper-left corner of the image box.
w	The width of the image box.
h	The height of the image box.
bmp	The pointer to the BITMAP object.

Note

If BITMAP's bmPitch is zero or bmBits is NULL, it will be malloc bmBits internal, you need init the BITMAP surely(such as InitBitmap) or memset(bmp, 0, sizeof(BITMAP)).

See also

FillBoxWithBitmap, Bitmap structure

GetPixelInBitmap()

static inline gal_pixel GUIAPI GetPixelInBitmap ( const BITMAP *  bmp, int  x, int  y  )

inlinestatic

Returns the pixel value in a BITMAP object.

This function returns the pixel value at the position (x,y) in the BITMAP object bmp.

Parameters

bmp	The BITMAP object.
x	x,y: The position of the pixel in the bitmap relative to the upper-left corner of the bitmap.
y	x,y: The position of the pixel in the bitmap relative to the upper-left corner of the bitmap.

Returns

The pixel value, if the position is out of the bitmap, zero returned.

See also

SetPixelInBitmap, Bitmap structure

Definition at line 5567 of file gdi.h.

GetPixelInBitmapEx()

gal_pixel GUIAPI GetPixelInBitmapEx	(	const BITMAP *	bmp,
		int	x,
		int	y,
		Uint8 *	alpha
	)

Returns the pixel value in a BITMAP object.

This function returns the pixel value and alpha at the position (x,y) in the BITMAP object bmp.

Parameters

bmp	The BITMAP object.
x	x,y: The position of the pixel in the bitmap relative to the upper-left corner of the bitmap.
y	x,y: The position of the pixel in the bitmap relative to the upper-left corner of the bitmap.
alpha	The point to alpha of position (x, y).

Returns

The pixel value, if the position is out of the bitmap, zero returned.

Note

if the bitmap with BMP_TYPE_ALPHA_MASK flag, the alpha value will be read from bmp->AlphaMask(Bitmap Alpha Mask array).

See also

SetPixelInBitmapEx, Bitmap structure

SaveMainWindowContent()

BOOL GUIAPI SaveMainWindowContent	(	HWND	hWnd,
		const char *	filename
	)

Saves content of a main window to a file.

This function saves the content of the main window hWnd to the image file filename. MiniGUI uses the extension name of the file to determine the format of the image file.

Parameters

hWnd	Handle to the main window.
filename	The name of the image file.

Returns

TRUE on success, otherwise FALSE.

Note

Only defined for _MGMISC_SAVESCREEN.

See also

Bitmap file load/save operations

SaveScreenRectContent()

BOOL GUIAPI SaveScreenRectContent	(	const RECT *	rc,
		const char *	filename
	)

Saves content of a rectangle in the screen to a file.

This function saves the content of the rect rc to the image file filename. MiniGUI uses the extension name of the file to determine the format of the image file.

Parameters

rc	The RECT object defined the rectangle in the screen.
filename	The name of the image file.

Returns

TRUE on success, otherwise FALSE.

Note

Only defined for _MGMISC_SAVESCREEN.

See also

Bitmap file load/save operations

ScaleBitmapEx()

BOOL GUIAPI ScaleBitmapEx	(	BITMAP *	dst,
		const BITMAP *	src,
		HDC	ref_dc
	)

Scales a BITMAP object into another BITMAP object by specify algorithm.

This function scales a BITMAP object src into another BITMAO object dst by specify algorithm. The source rectangle and the destination rectangle both are defined in the BITMAP objects.

Parameters

dst	The destination BITMAP object.
src	The srouce BITMAP object.
ref_dc	The device context of Bitmap's relative device dc.

Returns

TRUE on success, otherwise FALSE.

Note

you should init the dst Bitmap first, such as bmPitch and bmBits.

See also

FillBoxWithBitmap, StretchBlt, Bitmap structure

SetPixelInBitmap()

static inline BOOL GUIAPI SetPixelInBitmap ( const BITMAP *  bmp, int  x, int  y, gal_pixel  pixel  )

inlinestatic

Set pixel value in a BITMAP object.

This function sets the pixel value at the position (x,y) in the BITMAP object bmp.

Parameters

bmp	The BITMAP object.
x	x,y: The position of the pixel in the bitmap relative to the upper-left corner of the bitmap.
y	x,y: The position of the pixel in the bitmap relative to the upper-left corner of the bitmap.
pixel	The pixel value.

Returns

TRUE on success. If the position is out of the bitmap, FALSE returned.

See also

GetPixelInBitmap, Bitmap structure

Definition at line 5619 of file gdi.h.

StretchBlt()

void GUIAPI StretchBlt ( HDC  hsdc, int  sx, int  sy, int  sw, int  sh, HDC  hddc, int  dx, int  dy, int  dw, int  dh, DWORD  dwRop  )

inlinestatic

Copies a bitmap from a source rectangle into a destination rectangle, streches the bitmap if necessary.

This function copies a bitmap from a source rectangle into a destination rectangle, streching or compressing the bitmap to fit the dimension of the destination rectangle, if necessary. This function is similar with

See also

BitBlt function except the former scaling the bitmap. (dw,dh) specifies the size of the destination rectangle.

Parameters

hsdc	The source device context.
sx	The x coordinate of the upper-left corner of the rectangle in the source DC.
sy	The y coordinate of the upper-left corner of the rectangle in the source DC.
sw	The width of the source rectangle.
sh	The height of the source rectangle.
hddc	The destination device context hddc.
dx	The x coordinate of the upper-left corner of the rectangle in the destination DC.
dy	The y coordinate of the upper-left corner of the rectangle in the destination DC.
dw	The width of the destination rectangle.
dh	The height of the destination rectangle.
dwRop	The color blending method, see ColorBlendMethod. This argument is only valid when Pixman is used.

Note

When color key is specified for the blitting operation, or the formats of the device contexts are not supported by Pixman, this function will use the legacy implementation. In this situation, the color blending method and the scaling filter will be ignored.

See also

BitBlt, SetMemDCAlpha, SetMemDCColorKey, ColorBlendMethod

Definition at line 5493 of file gdi.h.