/*
 * Copyright © 2002 David Dawes
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Except as contained in this notice, the name of the author(s) shall
 * not be used in advertising or otherwise to promote the sale, use or other
 * dealings in this Software without prior written authorization from
 * the author(s).
 *
 * Authors: David Dawes <dawes@xfree86.org>
 *
 */

#ifndef _VBE_MODES_H

/*
 * This is intended to be stored in the DisplayModeRec's private area.
 * It includes all the information necessary to VBE information.
 */
typedef struct _VbeModeInfoData {
    int mode;
    VbeModeInfoBlock *data;
    VbeCRTCInfoBlock *block;
} VbeModeInfoData;

#define V_DEPTH_1	0x001
#define V_DEPTH_4	0x002
#define V_DEPTH_8	0x004
#define V_DEPTH_15	0x008
#define V_DEPTH_16	0x010
#define V_DEPTH_24_24	0x020
#define V_DEPTH_24_32	0x040
#define V_DEPTH_24	(V_DEPTH_24_24 | V_DEPTH_24_32)
#define V_DEPTH_30	0x080
#define V_DEPTH_32	0x100

#define VBE_MODE_SUPPORTED(m)	(((m)->ModeAttributes & 0x01) != 0)
#define VBE_MODE_COLOR(m)	(((m)->ModeAttributes & 0x08) != 0)
#define VBE_MODE_GRAPHICS(m)	(((m)->ModeAttributes & 0x10) != 0)
#define VBE_MODE_VGA(m)		(((m)->ModeAttributes & 0x40) == 0)
#define VBE_MODE_LINEAR(m)	(((m)->ModeAttributes & 0x80) != 0 && \
				 ((m)->PhysBasePtr != 0))

#define VBE_MODE_USABLE(m, f)	(VBE_MODE_SUPPORTED(m) || \
				 (f & V_MODETYPE_BAD)) && \
				VBE_MODE_GRAPHICS(m) && \
				(VBE_MODE_VGA(m) || VBE_MODE_LINEAR(m))
				
#define V_MODETYPE_VBE		0x01
#define V_MODETYPE_VGA		0x02
#define V_MODETYPE_BAD		0x04

extern _X_EXPORT int VBEFindSupportedDepths(vbeInfoPtr pVbe, VbeInfoBlock *vbe,
				  int *flags24, int modeTypes);
extern _X_EXPORT DisplayModePtr VBEGetModePool(ScrnInfoPtr pScrn, vbeInfoPtr pVbe,
					VbeInfoBlock *vbe, int modeTypes);
extern _X_EXPORT void VBESetModeNames(DisplayModePtr pMode);
extern _X_EXPORT void VBESetModeParameters(ScrnInfoPtr pScrn, vbeInfoPtr pVbe);


/*
 * Note: These are alternatives to the standard helpers.  They should
 * usually just wrap the standard helpers.
 */
extern _X_EXPORT int VBEValidateModes(ScrnInfoPtr scrp, DisplayModePtr availModes,
			    char **modeNames, ClockRangePtr clockRanges,
			    int *linePitches, int minPitch, int maxPitch,
			    int pitchInc, int minHeight, int maxHeight,
			    int virtualX, int virtualY, int apertureSize,
			    LookupModeFlags strategy);
extern _X_EXPORT void VBEPrintModes(ScrnInfoPtr scrp);

#endif /* VBE_MODES_H */
