module VGAImageRenderer(
  input i_Clk,
  input i_HSync,
  input i_VSync,

  output o_HSync,
  output o_VSync,
  output [2:0] o_Red,
  output [2:0] o_Green,
  output [2:0] o_Blue
);
  // sync signals
  wire w_HSync_FromCurrentPos, w_VSync_FromCurrentPos;
  wire w_IsActiveArea;

  // screen location
  wire [9:0] w_X, w_Y;
  wire [6:0] w_CellX;
  wire [5:0] w_CellY;

  // ram reading
  reg r_doImageRAMRead = 1;
  reg r_doImageRAMWrite = 0;
  wire w_imageRAMReadDataReady;
  wire [4:0] w_imageRAMReadData;

  wire [2:0] w_Red, w_Green, w_Blue;

  VGA_Current_Beam_Position currentPos (
    .i_Clk(i_Clk),
    .i_HSync(i_HSync),
    .i_VSync(i_VSync),

    .o_HSync(w_HSync_FromCurrentPos),
    .o_VSync(w_VSync_FromCurrentPos),
    .o_X(w_X),
    .o_Y(w_Y),
    .o_IsActiveArea(w_IsActiveArea)
  );

  assign w_CellX = w_X[9:3];
  assign w_CellY = w_Y[9:3];

  // takes a tick, so add one to HSync/VSync
  ImageRAM imageRam (
    .i_Clk(i_Clk),
    .i_ReadX(w_CellX),
    .i_ReadY(w_CellY),
    .i_doRead(r_doImageRAMRead),
    .o_ReadDataReady(w_imageRAMReadDataReady),
    .o_ReadData(w_imageRAMReadData),

    .i_WriteX(),
    .i_WriteY(),
    .i_WriteData(),
    .i_DoWrite(r_doImageRAMWrite),
    .o_WriteComplete()
  );

  ImageIndexToColor palette (
    .i_Clk(i_Clk),
    .i_ColorIndex(w_imageRAMReadData),
    .o_Red(w_Red),
    .o_Green(w_Green),
    .o_Blue(w_Blue),

    .i_DoWrite(r_doImageRAMWrite),
    .i_WriteColorIndex(),
    .i_WriteColor_Red(),
    .i_WriteColor_Green(),
    .i_WriteColor_Blue(),
    .o_WriteComplete()
  );

  assign o_Red = w_IsActiveArea ? w_Red : 0;
  assign o_Green = w_IsActiveArea ? w_Green : 0;
  assign o_Blue = w_IsActiveArea ? w_Blue : 0;

  assign o_HSync = w_HSync_FromCurrentPos;
  assign o_VSync = w_VSync_FromCurrentPos;
endmodule