class GBA::PPU

• GBA::PPU
• Reference
• Object

Defined in:

crab/gba/ppu.cr

Constant Summary

SPRITE_PIXEL = SpritePixel.new(4, 0, false, false)

Constructors

• .new(gba : GBA)

Instance Method Summary

• #[](io_addr : UInt32) : UInt8
• #[]=(io_addr : UInt32, value : UInt8) : Nil
• #bitmap? : Bool
• #blend(top : UInt16, bot : UInt16, blend_mode : BlendMode) : UInt16

  Simple blending routine just to mix two UInt16 colors.

• #blend(top : Color, bot : Color, effects_enabled : Bool) : UInt16

  Blend the colors handling special-case sprite logic.

• #calculate_color(col : Int) : UInt16

  Calculate the color at the current position.

• #composite(scanline : Slice(UInt16)) : Nil
• #draw : Nil
• #end_hblank : Nil
• #frame : Bool
• #frame=(frame : Bool)
• #framebuffer : Slice(UInt16)
• #get_enables(col : Int) : Tuple(UInt16, Bool)

  Returns a u16 representing the layer enable bits and a bool indicating whether effects are enabled.

• #oam : Slice(UInt8)
• #pram : Slice(UInt8)
• #render_aff_bg(bg : Int) : Nil
• #render_reg_bg(bg : Int) : Nil
• #render_sprites : Nil
• #scanline : Nil
• #se_address(tx : Int, ty : Int, screen_size : Int) : Int

  Get the screen entry offset from the tile x, tile y, and background screen-size param using tonc algo

• #select_top_colors(enable_bits : Int, col : Int) : Tuple(Color, Color)

  Select the top two colors at the current position.

• #start_hblank : Nil
• #start_line : Nil
• #vram : Slice(UInt8)

Constructor Detail

Instance Method Detail