-- Information:                             --
-- PPU (Picture processing unit)            --
-- LR35902 (DMG)                            --

return {
  screen  = {
    width    = 160,
    height   = 144,
    vsync    =  59.73,
    origin   = {
      x = 0,
      y = 0,
    },
    -- Total of unique texels, pixels and vertices on VRAM --
    pixels   = 21504,
    texels   =   296,
    vertices = false,
  },
  colours = {
    total       = 4,
    limit       = false,
    transparent = {
      sprite = 'colourKey',
      tile   = false,
    },
    tileDepth   = 'colourKey',
    palettes    = {
      {
        total   = 2,
        type    = 'spritePerPalette',
        colours = 4,
        layers  = false,
      },
      {
        total   = 1,
        type    = 'tilePerPaletteBySeccion',
        colours = 4,
        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  = 40,
    -- Limit sprites on line (scanline) without flickering --
    onLine    = 10,
    unique    = 256,
    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 =    32,
              tiles  =  1024,
              pixels = 65536,
            },
          },
          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 =     20+1,
              Ytiles =     18+1,
              tiles  =    360+20+18+1,
              pixels =  23040,
            },
          },
          tiles          = 'screenSections',
          pixels         = 'screenSections',
        },
        -- Total of tiles on VRAM --
        unique         = {
          data       = 192,
          background = 256,
          total      = 448,
        },
        maximum        = false,
        mirror         = {
          switchable = false,
          nametables = 1,
          'free tiles',
        },
        screenSections = {
          main     = {
            optional    = false,
            moveSection = false,
            {
              startSection = {
                x = 'startVRAM',
                y = 'startVRAM',
              },
              endSection   = {
                x = 'endVRAM',
                y = 'endVRAM',
              },
              size         = {
                -- Tile size in pixels --
                width  = 8,
                height = 8,
              },
              transform    = {
                move   = true,
                rotate = false,
                scale  = false,
                shear  = false,
                affine = false,
              },
            },
          },
          overlay0 = {
            optional    = true,
            moveSection = true,
            {
              startSection = {
                x = 'free',
                y = 'free',
              },
              endSection   = {
                x = 'free',
                y = 'free',
              },
              size         = {
                -- Tile size in pixels --
                width  = 8,
                height = 8,
              },
              transform    = {
                move   = false,
                rotate = false,
                scale  = false,
                shear  = false,
                affine = false,
              },
            },
          },
        },
      },
    },
  },
}