/**************************************************************************
 * 
 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * 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, sub license, 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 (including the
 * next paragraph) 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 NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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.
 * 
 **************************************************************************/

#include "intel_blit.h"
#include "intel_buffers.h"
#include "intel_swapbuffers.h"
#include "intel_fbo.h"
#include "intel_batchbuffer.h"
#include "drirenderbuffer.h"
#include "vblank.h"
#include "i915_drm.h"



/*
 * Correct a drawablePrivate's set of vblank flags WRT the current context.
 * When considering multiple crtcs.
 */
GLuint
intelFixupVblank(struct intel_context *intel, __DRIdrawable *dPriv)
{
   if (!intel->intelScreen->driScrnPriv->dri2.enabled &&
       intel->intelScreen->driScrnPriv->ddx_version.minor >= 7) {
      volatile drm_i915_sarea_t *sarea = intel->sarea;
      drm_clip_rect_t drw_rect = { .x1 = dPriv->x, .x2 = dPriv->x + dPriv->w,
				   .y1 = dPriv->y, .y2 = dPriv->y + dPriv->h };
      drm_clip_rect_t planeA_rect = { .x1 = sarea->planeA_x, .y1 = sarea->planeA_y,
				     .x2 = sarea->planeA_x + sarea->planeA_w,
				     .y2 = sarea->planeA_y + sarea->planeA_h };
      drm_clip_rect_t planeB_rect = { .x1 = sarea->planeB_x, .y1 = sarea->planeB_y,
				     .x2 = sarea->planeB_x + sarea->planeB_w,
				     .y2 = sarea->planeB_y + sarea->planeB_h };
      GLint areaA = driIntersectArea( drw_rect, planeA_rect );
      GLint areaB = driIntersectArea( drw_rect, planeB_rect );
      GLuint flags;

      /* Update vblank info
       */
      if (areaB > areaA || (areaA == areaB && areaB > 0)) {
	 flags = dPriv->vblFlags | VBLANK_FLAG_SECONDARY;
      } else {
	 flags = dPriv->vblFlags & ~VBLANK_FLAG_SECONDARY;
      }

      /* Do the stupid test: Is one of them actually disabled?
       */
      if (sarea->planeA_w == 0 || sarea->planeA_h == 0) {
	 flags = dPriv->vblFlags | VBLANK_FLAG_SECONDARY;
      } else if (sarea->planeB_w == 0 || sarea->planeB_h == 0) {
	 flags = dPriv->vblFlags & ~VBLANK_FLAG_SECONDARY;
      }

      return flags;
   } else {
      return dPriv->vblFlags & ~VBLANK_FLAG_SECONDARY;
   }
}