D3DMBLEND (Windows Embedded CE 6.0)
This enumeration provides values that identify scaling factors for alpha blending operations. These scaling factors are multiplied by either the source or destination pixel values depending on whether the render states D3DMRS_SRCBLEND or D3DMRS_DESTBLEND (see D3DMRENDERSTATETYPE) are specified. For more information, see Alpha Blending.
There is a blending factor B for each color channel r, g, and b and for the alpha channel a. These blending factors are derived from the source, S, and destination, D, pixel values.
typedef enum _D3DMBLEND {
D3DMBLEND_ZERO = 1,
D3DMBLEND_ONE = 2,
D3DMBLEND_SRCCOLOR = 3,
D3DMBLEND_INVSRCCOLOR = 4,
D3DMBLEND_SRCALPHA = 5,
D3DMBLEND_INVSRCALPHA = 6,
D3DMBLEND_DESTALPHA = 7,
D3DMBLEND_INVDESTALPHA = 8,
D3DMBLEND_DESTCOLOR = 9,
D3DMBLEND_INVDESTCOLOR = 10,
D3DMBLEND_SRCALPHASAT = 11,
D3DMBLEND_FORCE_ULONG = 0x7fffffff,
} D3DMBLEND;
- D3DMBLEND_ZERO
-
Identifies that the scaling factor is 0 for all channels.
Br = 0 Bg = 0 Bb = 0 Ba = 0
- D3DMBLEND_ONE
-
Identifies that the scaling factor is 1 for all channels. This is equivalent to not performing a scaling multiplication at all.
Br = 1 Bg = 1 Bb = 1 Ba = 1
- D3DMBLEND_SRCCOLOR
-
Identifies that the scaling factor is the source pixel value.
Br = Sr Bg = Sg Bb = Sb Ba = Sa
- D3DMBLEND_INVSRCCOLOR
-
Identifies that the scaling factor is 1 minus the source pixel value, for each color channel.
Br = 1 – Sr Bg = 1 – Sg Bb = 1 – Sb Ba = 1 – Sa
- D3DMBLEND_SRCALPHA
-
Identifies that the scaling factor is the source alpha value for all color channels.
Br = Sa Bg = Sa Bb = Sa Ba = Sa
- D3DMBLEND_INVSRCALPHA
-
Identifies that the scaling factor is one minus the source alpha value for all color channels.
Br = 1 – Sa Bg = 1 – Sa Bb = 1 – Sa Ba = 1 – Sa
- D3DMBLEND_DESTALPHA
-
Identifies that the scaling factor is the destination alpha value for all color channels.
Br = Da Bg = Da Bb = Da Ba = Da
- D3DMBLEND_INVDESTALPHA
-
Identifies that the scaling factor is one minus the destination alpha value for all color channels.
Br = 1 – Da Bg = 1 – Da Bb = 1 – Da Ba = 1 – Da
- D3DMBLEND_DESTCOLOR
-
Identifies that the scaling factor is the destination pixel value.
Br = Dr Bg = Dg Bb = Db Ba = Da
- D3DMBLEND_INVDESTCOLOR
-
Identifies that the scaling factor is 1 minus the destination pixel value, for each color channel.
Br = 1 – Dr Bg = 1 – Dg Bb = 1 – Db Ba = 1 – Da
- D3DMBLEND_SRCALPHASAT
-
Identifies that the scaling factor is determined by the following equations.
Br = min(Sa, 1–Da) Bg = min(Sa, 1–Da) Bb = min(Sa, 1–Da) Ba = 1
- D3DMBLEND_FORCE_ULONG
-
Forces the compiler to interpret the enumeration as a ULONG value. This value is not used directly in Direct3D Mobile programming.
