D2C_TEXTURECLAMPX=Val_0x0, D2C_BSF=Val_0x0, D2C_BDFA=Val_0x0, D2C_BSIA=Val_0x0, D2C_BDF=Val_0x0, D2C_PATTERNENABLE=Val_0x0, D2C_BC2=Val_0x0, D2C_USE_ACB=Val_0x0, D2C_TEXTURECLAMPY=Val_0x0, D2C_BSI=Val_0x0, D2C_TEXTUREFILTERX=Val_0x0, D2C_CLUTFORMAT=Val_0x0, D2C_BDI=Val_0x0, D2C_BSFA=Val_0x0, D2C_TEXTUREENABLE=Val_0x0, D2C_TEXTUREFILTERY=Val_0x0, D2C_BDIA=Val_0x0, D2C_RLE_PIXEL_WIDTH=Val_0x0
Surface Control Register
| D2C_PATTERNENABLE | Pixel source is a pattern color (blend of GPU2D_COLOR1 and GPU2D_COLOR2 depending on GPU2D_PATTERN and pattern index) 0 (Val_0x0): Disable pattern 1 (Val_0x1): Enable pattern |
| D2C_TEXTUREENABLE | Pixel source is read from texture and used as an alpha to blend between GPU2D_COLOR1 and GPU2D_COLOR2. 0 (Val_0x0): Disable texture 1 (Val_0x1): Enable texture |
| D2C_PATTERNSOURCEL5 | Limiter 5 is used as pattern index instead of the default U-limiter |
| D2C_USE_ACB | (see bit D2C_WRITEFORMAT) (see bits D2C_BSFA, D2C_BDFA, D2C_BSIA, D2C_BDIA, D2C_WRITEFORMAT) 0 (Val_0x0): Use ‘write alpha’ mode 1 (Val_0x1): Use full alpha channel blending mode |
| D2C_READFORMAT3 | Third bit of the texture buffer format. See bit D2C_READFORMAT for description |
| D2C_READFORMAT4 | Fourth bit of the texture buffer format. See bit D2C_READFORMAT for description. |
| D2C_BSFA | If bit D2C_USE_ ACB == 1: 0 (Val_0x0): Use 1.0 as source blend factor for alpha channel 1 (Val_0x1): Use alpha as source blend factor for alpha channel |
| D2C_BDFA | If bit D2C_USE_ ACB == 1: 0 (Val_0x0): Use 1.0 as destination blend factor for alpha channel 1 (Val_0x1): Use alpha as destination blend factor for alpha channel |
| D2C_WRITEFORMAT3 | Third bit of the framebuffer format. See bit D2C_WRITEFORMAT for description. |
| D2C_BSF | 0 (Val_0x0): Use 1.0 as source blend factor 1 (Val_0x1): Use alpha as source blend factor |
| D2C_BDF | 0 (Val_0x0): Use 1.0 as destination blend factor 1 (Val_0x1): Use alpha as destination blend factor |
| D2C_BSI | 0 (Val_0x0): Use blend factor as specified through bit D2C_BSF 1 (Val_0x1): Invert source blend factor (1-x) |
| D2C_BDI | 0 (Val_0x0): Use blend factor as specified through bit D2C_BDF 1 (Val_0x1): Invert destination blend factor (1-x) |
| D2C_BC2 | Blend color2 instead of framebuffer pixel 0 (Val_0x0): Use pixel from framebuffer as destination 1 (Val_0x1): Use color2 as destination |
| D2C_TEXTURECLAMPX | 0 (Val_0x0): Mask texture U-coordinate 1 (Val_0x1): Clamp texture U-coordinate |
| D2C_TEXTURECLAMPY | 0 (Val_0x0): Mask texture V-coordinate 1 (Val_0x1): Clamp texture V-coordinate |
| D2C_TEXTUREFILTERX | 0 (Val_0x0): No filtering on texture U-axis 1 (Val_0x1): Linear filtering on texture U-axis |
| D2C_TEXTUREFILTERY | 0 (Val_0x0): No filtering on texture V-axis 1 (Val_0x1): Linear filtering on texture V-axis |
| D2C_READFORMAT | Pixel format of the texture buffer. This includes configuring the D2C_READFORMAT3 and D2C_READFORMAT4 bits. 0x0: ALPHA8 (1 bpp) 0x1: RGB565 (2 bpp) 0x2: ARGB8888 and RGB888 (4 bpp) 0x3: ARGB4444 and RGB444 (2 bpp) 0x4: ARGB1555 and RGB555 (2 bpp) 0x5: AI44: 4-bit alpha, 4-bit indexed color (1 bpp) 0x6: RGBA8888 (4 bpp) 0x7: RGBA4444 (2 bpp) 0x8: RGBA5551 (2 bpp) 0x9: I8, 8-bit indexed color (1 bpp) 0xA: I4, 4-bit indexed color (2 ppb) 0xB: I2, 2-bit indexed color (4 ppb) 0xC: I1, 1-bit indexed color (8 ppb) |
| D2C_WRITEFORMAT | Pixel format of the framebuffer. This includes configuring the D2C_WRITEFORMAT3 bit. 0x0: ALPHA8 (1 bpp) 0x1: RGB565 (2 bpp) 0x2: ARGB8888 (4 bpp) 0x3: ARGB4444 (2 bpp) 0x6: RGBA8888 (4 bpp) 0x7: RGBA4444 (2 bpp) |
| D2C_WRITEALPHA | If bit D2C_USE_ ACB == 0: Set the ‘alpha source’ for the framebuffer. 0x0: Use alpha from color2 0x1: Use source alpha (pixel coverage) 0x2: Use 0.0 as alpha 0x3: Use alpha from framebuffer If bit D2C_USE_ ACB == 1: 0x0: BC2A is 1. Use destination alpha from color2 0x1, 0x2, or 0x3 = BC2A is 0. Use destination alpha |
| D2C_RLE_ENABLE | Enables the RLE unit. |
| D2C_CLUT_ENABLE | Enables the CLUT. If CLUT is not enabled for an indexed format, the index will be directly put on the internal R, G, B channels. |
| D2C_COLKEY_ENABLE | Enable the color keying unit. |
| D2C_CLUTFORMAT | 0 (Val_0x0): ARGB8888 (default) 1 (Val_0x1): RGB565 |
| D2C_BSIA | If bit D2C_USE_ ACB == 1: 0 (Val_0x0): Use blend factor as specified through bit D2C_BSFA 1 (Val_0x1): Invert source blend factor (1-x) |
| D2C_BDIA | If bit D2C_USE_ ACB == 1: 0 (Val_0x0): Use blend factor as specified through bit D2C_BDFA 1 (Val_0x1): Invert destination blend factor (1-x) |
| D2C_RLE_PIXEL_WIDTH | Width of a texel for the RLE unit: 0 (Val_0x0): 1 byte per texel 1 (Val_0x1): 2 bytes per texel 2 (Val_0x2): 3 bytes per texel 3 (Val_0x3): 4 bytes per texel |