-- Information:                             --
-- PPU (Picture processing unit)            --
-- RP2C07 with MMC2/MMC4                    --
-- (Memory management controller)           --

return {
  screen  = {
    width    = 256,
    height   = 240,
    vsync    =  50.0070,
    origin   = {
      x = 0,
      y = 0,
    },
    -- Total of unique texels, pixels and vertices on VRAM --
    pixels   = 139264,
    texels   =    576,
    vertices = false,
  },
  colours = {
    total       = 64,
    limit       = 25,
    transparent = {
      sprite = colourKey,
      tile   = colourKey,
    },
    palettes    = {
      {
        total   = 4,
        type    = 'tilePerPalette',
        colours = 3,
        layers  = false,
      },
      {
        total   = 4,
        type    = 'spritePerPalette',
        colours = 3,
        layers  = false,
      },
    },
  },
  meshes  = false,
  shaders = {
    api          = false,
    version      = false,
    fragment     = false,
    vectex       = false,
    geometry     = false,
    tessellation = false,
  },
  physic  = false,
  sprites = {
    -- Limit sprites on screen --
    onScreen  = 64,
    -- Limit sprites on line (scanline) without flickering --
    onLine    =  8,
    transform = {
      move   = true,
      rotate = false,
      scale  = 'flip',
      shear  = false,
      affine = false,
    },
    -- Sprite sizes in pixels --
    sizes     = {
      {
        width  =  8,
        height =  8,
      },
      {
        width  =  8,
        height = 16,
      },
    },
  },
  tiles   = {
    layers = {
      {
        -- Total tiles and pixels on VRAM --
        onVRAM         = {
          screenSections = {
            all = {
              Xtiles =     32,
              Ytiles =     30,
              tiles  =    960,
              pixels = 245760,
            },
          },
          tiles          = 'screenSections',
          pixels         = 'screenSections',
        },
        -- Total tiles and pixels on screen --
        onScreen       = {
          screenSections = {
            -- On screen section with support scrolling X and/or Y, --
            -- will be include one tile by axis                     --
            all = {
              Xtiles =     16+1,
              Ytiles =     15+1,
              tiles  =    240+16+15+1,
              pixels =  61440,
            },
          },
          tiles          = 'screenSections',
          pixels         = 'screenSections',
        },
        -- Total of unique tiles on VRAM --
        unique         = false,
        maximum        = 512,
        screenSections = {
          main = {
            optional    = false,
            moveSection = false,
            {
              startSection = {
                x = 'startVRAM',
                y = 'startVRAM',
              },
              endSection   = {
                x = 'endVRAM',
                y = 'endVRAM',
              },
              size         = {
                -- Tile size in pixels --
                width  = 16,
                height = 16,
              },
              transform    = {
                move   = true,
                rotate = false,
                scale  = false,
                shear  = false,
                affine = false,
              },
            },
          },
        },
      },
    },
  },
}