--	 CIFDevicesDefs.Mesa
-- Written by Martin Newell, March 1980
-- Last updated: March 27, 1981  5:19 PM

-- Provides multiple implementations of Trapezoid for different devices

DIRECTORY
CIFUtilitiesDefs USING [Rectangle],
Graphics USING [DeviceContext];

CIFDevicesDefs: DEFINITIONS =

BEGIN OPEN CIFUtilitiesDefs;

DeviceDescriptor: TYPE = POINTER TO DeviceDescriptorRecord;
DeviceDescriptorRecord: TYPE = RECORD [
	next:					DeviceDescriptor,
	name:					STRING,
	deviceSelect: 		PROCEDURE RETURNS[BOOLEAN],
	deviceDrawFrame: 	PROCEDURE,
	deviceSetScale: 		PROCEDURE [factor: REAL],
	deviceSetClipRegion: PROCEDURE [rt: Rectangle],
	deviceOutput: 		PROCEDURE,
	deviceLayer: 		PROCEDURE [layer: CARDINAL],
	deviceLoadLayer: 	PROCEDURE [layer: CARDINAL, v0,v1,v2,v3: CARDINAL],
	deviceRectangle: 	PROCEDURE [r: Rectangle],
	deviceStartPoly: 	PROCEDURE [x,y: REAL],
	devicePolyVertex: 	PROCEDURE [x,y: REAL],
	deviceEndPoly: 		PROCEDURE,
	deviceText: 			PROCEDURE [text: STRING, x,y: REAL]
];

SelectDevice: PUBLIC PROCEDURE [deviceName: STRING] RETURNS[ok: BOOLEAN];

DrawFrame: PUBLIC PROCEDURE;

SetScale: PUBLIC PROCEDURE [factor: REAL];

SetClipRegion: PUBLIC PROCEDURE [rt: Rectangle];

OutputDevice: PUBLIC PROCEDURE;

Draw: PUBLIC PROCEDURE;

LookupLayer: PUBLIC PROCEDURE [s: PACKED ARRAY [0..4) OF CHARACTER] RETURNS[CARDINAL];

LookupLayerString: PUBLIC PROCEDURE[layerName: STRING] RETURNS[CARDINAL];

SetLayer: PUBLIC PROCEDURE [CARDINAL];

LoadLayer: PUBLIC PROCEDURE[layer: CARDINAL, v0,v1,v2,v3: CARDINAL];

SetLayerVisible: PUBLIC PROCEDURE[layer: CARDINAL, visible: BOOLEAN];

LayerVisible: PUBLIC PROCEDURE[layer: CARDINAL] RETURNS[visible: BOOLEAN];

OutputText: PUBLIC PROCEDURE[text: STRING, x,y: REAL];

RegisterDevice: PUBLIC PROCEDURE[device: DeviceDescriptor];

UnRegisterDevice: PUBLIC PROCEDURE[deviceName: STRING];

GetCIFOutDevice: PUBLIC PROCEDURE RETURNS[device: Graphics.DeviceContext];

LENGTHLayerArray: PUBLIC CARDINAL;
MaxLENGTHLayerArray: CARDINAL = 20;

END.
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