Robotron: 2084: Routine at D317

D317: Render HUD

Used by the routines at Stage_Next_Wave and PlayerDeath. Clears the screen buffer, sets a white background, draws the playfield border (DrawPlayfieldBorder), and redraws the attribute bar (UpdateAttributeBar) before falling through to RenderHUD_Draw. Scores (PrintPlayerScore) and lives (DrawLivesDisplay) are then rendered for each player in turn by swapping state with Swap_Player_State; the "WAVE" label and wave number (PrintWaveNumber) are printed last for player 1.
RenderHUD	D317	CALL ClearScreenBuffer	Call ClearScreenBuffer.
	D31A	LD A,$07	Call SetBackgroundColour using WHITE.
	D31C	CALL SetBackgroundColour	Call SetBackgroundColour using WHITE.
	D31F	CALL DrawPlayfieldBorder	Call DrawPlayfieldBorder.
	D322	CALL UpdateAttributeBar	Call UpdateAttributeBar.
This entry point is used by the routine at Clear_Screen_And_Render_HUD. Shared entry point, also reached from Clear_Screen_And_Render_HUD via JP (which clears the screen and sets the background but skips the wave animation and attribute bar setup). Renders scores and lives for player 1, then swaps to player 2.
RenderHUD_Draw	D325	CALL PrintPlayerScore	Call PrintPlayerScore.
	D328	CALL DrawLivesDisplay	Call DrawLivesDisplay.
Swap to player 2 to render their score, lives and wave number.
	D32B	CALL Swap_Player_State	Call Swap_Player_State.
	D32E	CALL PrintPlayerScore	Call PrintPlayerScore.
	D331	CALL DrawLivesDisplay	Call DrawLivesDisplay.
	D334	CALL PrintWaveNumber	Call PrintWaveNumber.
Swap back to player 1; print the "WAVE" label and player 1's wave number, then redraw the attribute bar to complete the HUD.
	D337	CALL Swap_Player_State	Call Swap_Player_State.
	D33A	LD HL,$D0E6	Call PrintMessaging using Messaging_Wave.
	D33D	CALL PrintMessaging	Call PrintMessaging using Messaging_Wave.
	D340	CALL PrintWaveNumber	Call PrintWaveNumber.
	D343	CALL UpdateAttributeBar	Call UpdateAttributeBar.
	D346	RET	Return.