40.4.6.3.6 BLEND_WD5
| Name: | BLEND_WD5 |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| DPRE | DAFACT[2:0] | SPRE | SAFACT[2:0] | ||||||
| Access | |||||||||
| Reset | |||||||||
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| SPE[3:0] | FUNC[2:0] | ||||||||
| Access | |||||||||
| Reset | |||||||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| DCFACT[3:0] | SCFACT[3:0] | ||||||||
| Access | |||||||||
| Reset | |||||||||
Bit 23 – DPRE Destination Premult
| Value | Description |
|---|---|
| 0 | Destination pre-multiplication is disabled. |
| 1 | Destination pre-multiplication is enabled. Pixels from destination surface are multiplied by constant before blending. |
Bits 22:20 – DAFACT[2:0] Destination Alpha Factor
| Value | Name | Description |
|---|---|---|
| 0 | ZERO | (0, 0, 0, 0) |
| 1 | ONE | (1, 1, 1, 1) |
| 2 | SRC_ALPHA | (As, As, As, As) |
| 3 | ONE_MINUS_SRC_ALPHA | (1, 1, 1, 1)-(As, As, As, As) |
| 4 | DST_ALPHA | (Ad, Ad, Ad, Ad) |
| 5 | ONE_MINUS_DST_ALPHA | (1, 1, 1, 1)-(Ad, Ad, Ad, Ad) |
| 6 | CONSTANT_ALPHA | (Ac, Ac, Ac, Ac) |
| 7 | ONE_MINUS_CONSTANT_ALPHA | (1, 1, 1, 1)-(Ac, Ac, Ac, Ac) |
Bit 19 – SPRE Source Premult
| Value | Description |
|---|---|
| 0 | Source pre-multiplication is disabled. |
| 1 | Source pre-multiplication is enabled. Pixels from source surface are multiplied by constant before blending. |
Bits 18:16 – SAFACT[2:0] Source Alpha Factor
| Value | Name | Description |
|---|---|---|
| 0 | ZERO | (0, 0, 0, 0) |
| 1 | ONE | (1, 1, 1, 1) |
| 2 | SRC_ALPHA | (As, As, As, As) |
| 3 | ONE_MINUS_SRC_ALPHA | (1, 1, 1, 1)-(As, As, As, As) |
| 4 | DST_ALPHA | (Ad, Ad, Ad, Ad) |
| 5 | ONE_MINUS_DST_ALPHA | (1, 1, 1, 1)-(Ad, Ad, Ad, Ad) |
| 6 | CONSTANT_ALPHA | (Ac, Ac, Ac, Ac) |
| 7 | ONE_MINUS_CONSTANT_ALPHA | (1, 1, 1, 1)-(Ac, Ac, Ac, Ac) |
Bits 15:12 – SPE[3:0] Special Blend
| Value | Name | Description |
|---|---|---|
| 0 | LIGHTEN | Based on the color information in each channel, selects the base color or the blend color, whichever is lighter, as the resulting color. |
| 1 | DARKEN | Based on the color information in each channel, selects the base color or the blend color, whichever is darker, as the resulting color. |
| 2 | MULTIPLY | Based on the color information in each channel, multiplies the base color by the blend color. The result is always a darker color. |
| 3 | AVERAGE | Based on the color information in each channel, averages the base color and the blend color to generate the resulting color. |
| 4 | ADD | This blend mode adds pixel values. |
| 5 | SUBTRACT | Based on the color information in each channel, subtracts the blend color from the base color. |
| 6 | DIFFERENCE | Based on the color information in each channel, subtracts either the blend color from the base color or the base color from the blend color, depending on which has the greater brightness value. |
| 7 | NEGATION | This mode produces the opposite effect to difference. |
| 8 | SCREEN | Based on each channel’s color information, multiplies the inverse of the blend and base colors. The resulting color is always a lighter color. |
| 9 | OVERLAY | Multiplies or screens the colors, depending on the base color. |
| 10 | DODGE | Based on the color information in each channel, brightens the base color to reflect the blend color by decreasing the contrast between the two. |
| 11 | BURN | Based on the color information in each channel, darkens the base color to reflect the blend color by increasing the contrast between the two. |
| 12 | REFLECT | This blend mode can be used to add shiny objects or area if light. Black pixels in the blend are ignored as if they were transparent. |
| 13 | GLOW | The reverse of the REFLECT mode. GLOW effectively brightens the composition by the amount of brightness in the blend layer. Black pixels in the blend layer are rendered as if they were transparent. |
Bits 10:8 – FUNC[2:0] Blending Function
| Value | Name | Description |
|---|---|---|
| 0 | ADD | Cf=S*Cs +D*Cd |
| 1 | SUBTRACT | Cf=S*Cs -D*Cd |
| 2 | REVERSE | Cf=D*Cd +S*Cs |
| 3 | MIN | Cf=Min(Cs, Cd) |
| 4 | MAX | Cf=Max(Cs, Cd) |
| 5 | SPE | Special blending functions |
Bits 7:4 – DCFACT[3:0] Destination Color Factor
| Value | Name | Description |
|---|---|---|
| 0 | ZERO | (0, 0, 0, 0) |
| 1 | ONE | (1, 1, 1, 1) |
| 2 | SRC_COLOR | (As, Rs, Gs, Bs) |
| 3 | ONE_MINUS_SRC_COLOR | (1, 1, 1, 1)-(As, Rs, Gs, Bs) |
| 4 | DST_COLOR | (Ad, Rd, Gd, Bd) |
| 5 | ONE_MINUS_DST_COLOR | (1, 1, 1, 1)-(Ad, Rd, Gd, Bd) |
| 6 | SRC_ALPHA | (As, As, As, As) |
| 7 | ONE_MINUS_SRC_ALPHA | (1, 1, 1, 1)-(As, As, As, As) |
| 8 | DST_ALPHA | (Ad, Ad, Ad, Ad) |
| 9 | ONE_MINUS_DST_ALPHA | (1, 1, 1, 1)-(Ad, Ad, Ad, Ad) |
| 10 | CONSTANT_COLOR | (Ac, Rc, Gc, Bc) |
| 11 | ONE_MINUS_CONSTANT_COLOR | (1, 1, 1, 1)-(Ac, Rc, Gc, Bc) |
| 12 | CONSTANT_ALPHA | (Ac, Ac, Ac, Ac) |
| 13 | ONE_MINUS_CONSTANT_ALPHA | (1, 1, 1, 1)-(Ac, Ac, Ac, Ac) |
| 14 | SRC_ALPHA_SATURATE | (1, i, i, i) where i is equal to the minimum between As and 1-Ad |
Bits 3:0 – SCFACT[3:0] Source Color Factor
| Value | Name | Description |
|---|---|---|
| 0 | ZERO | (0, 0, 0, 0) |
| 1 | ONE | (1, 1, 1, 1) |
| 2 | SRC_COLOR | (As, Rs, Gs, Bs) |
| 3 | ONE_MINUS_SRC_COLOR | (1, 1, 1, 1)-(As, Rs, Gs, Bs) |
| 4 | DST_COLOR | (Ad, Rd, Gd, Bd) |
| 5 | ONE_MINUS_DST_COLOR | (1, 1, 1, 1)-(Ad, Rd, Gd, Bd) |
| 6 | SRC_ALPHA | (As, As, As, As) |
| 7 | ONE_MINUS_SRC_ALPHA | (1, 1, 1, 1)-(As, As, As, As) |
| 8 | DST_ALPHA | (Ad, Ad, Ad, Ad) |
| 9 | ONE_MINUS_DST_ALPHA | (1, 1, 1, 1)-(Ad, Ad, Ad, Ad) |
| 10 | CONSTANT_COLOR | (Ac, Rc, Gc, Bc) |
| 11 | ONE_MINUS_CONSTANT_COLOR | (1, 1, 1, 1)-(Ac, Rc, Gc, Bc) |
| 12 | CONSTANT_ALPHA | (Ac, Ac, Ac, Ac) |
| 13 | ONE_MINUS_CONSTANT_ALPHA | (1, 1, 1, 1)-(Ac, Ac, Ac, Ac) |
| 14 | SRC_ALPHA_SATURATE | (1, i, i, i) where i is equal to the minimum between As and 1-Ad |