-- Information:                             --
-- Video Mode 4 (official)                  --
--                                          --
-- Vertical tiles on VRAM,                  --
-- can be changed by compilation,           --
-- but is not recomended.                   --
-- Default value is:                        --
-- VRAM_TILES_V=32                          --
--                                          --
-- Numbers of video lines to render,        --
-- can be changed by compilation,           --
-- but is not recommended, changes the      --
-- CPU cyles.                               --
-- Default value is:                        --
-- FRAME_LINES=SCREEN_TILES_V*TILE_HEIGHT   --
--                                          --
-- First render line is used to adjust      --
-- vertical centering if the value          --
-- FRAME_LINES is changed.                  --
-- Can not be changed by compilation.       --
-- Default value is:                        --
-- FIRST_RENDER_LINE=24                     --

-- Sites:
-- http://uzebox.org/wiki/index.php?title=Video_Modes
-- https://github.com/Uzebox/uzebox
-- https://raw.githubusercontent.com/Uzebox/uzebox/master/kernel/videoMode4/videoMode4.def.h
-- https://raw.githubusercontent.com/Uzebox/uzebox/master/kernel/videoMode4/videomode4.s

return {
  screen  = {
    width    = 288,
    height   = 224,
    vsync    =  60,
    origin   = {
      x = 0,
      y = 0,
    },
    -- Total of unique texels, pixels and vertices on VRAM --
    pixels   = '?',
    texels   = '?',
    vertices = false,
  },
  colours = {
    total       = 256,
    limit       = false,
    transparent = {
      sprite = false,
      tile   = false,
    },
    palettes    = false,
  },
  meshes  = false,
  shaders = {
    api          = false,
    version      = false,
    fragment     = false,
    vectex       = false,
    geometry     = false,
    tessellation = false,
  },
  physic  = false,
  sprites = false,
  tiles   = {
    layers = {
      {
        -- Total tiles and pixels on VRAM --
        onVRAM         = {
          screenSections = {
            all  = {
              Xtiles =     32,
              Ytiles =     32,
              tiles  =   1024,
              pixels = 262144,
            },
          },
          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 = false,
              Ytiles = false,
              tiles  =   198+18+11+1+72,
              pixels = 50688+4608,
            main = {
              Xtiles =    18+1,
              Ytiles =    11+1,
              tiles  =   198+18+11+1,
              pixels = 50688,
            },
            text = {
              Xtiles =     36,
              Ytiles =      2,
              tiles  =     72,
              pixels =   4608,
            },
          },
          tiles          = 'screenSections',
          pixels         = 'screenSections',
        },
        -- Total of unique tiles on VRAM --
        unique         = '?',
        screenSections = {
          mirror  = false,
          main    = {
            optional    = false,
            moveSection = true,
            {
              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,
              },
            },
          },
          text    = {
            optional    = false,
            moveSection = false,
            {
              startSection = {
                x = 'startVRAM',
                y = -272,
              },
              endSection   = {
                x = 'endScreen',
                y = 'endScreen',
              },
              size         = {
                -- Tile size in pixels --
                width  =  8,
                height =  8,
              },
              transform    = {
                move   = false,
                rotate = false,
                scale  = false,
                shear  = false,
                affine = false,
              },
            },
          },
        },
      },
    },
  },
}