intel_blit.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/**************************************************************************
 * 
 * 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 <stdio.h>
#include <errno.h>

#include "mtypes.h"
#include "context.h"
#include "enums.h"

#include "intel_batchbuffer.h"
#include "intel_blit.h"
#include "intel_buffers.h"
#include "intel_context.h"
#include "intel_fbo.h"
#include "intel_reg.h"
#include "intel_regions.h"

#define FILE_DEBUG_FLAG DEBUG_BLIT

/**
 * Copy the back color buffer to the front color buffer. 
 * Used for SwapBuffers().
 */
void
intelCopyBuffer(const __DRIdrawablePrivate * dPriv,
                const drm_clip_rect_t * rect)
{

   struct intel_context *intel;
   const intelScreenPrivate *intelScreen;
   int ret;

   DBG("%s\n", __FUNCTION__);

   assert(dPriv);

   intel = intelScreenContext(dPriv->driScreenPriv->private);
   if (!intel)
      return;

   intelScreen = intel->intelScreen;

   if (intel->last_swap_fence) {
      dri_fence_wait(intel->last_swap_fence);
      dri_fence_unreference(intel->last_swap_fence);
      intel->last_swap_fence = NULL;
   }
   intel->last_swap_fence = intel->first_swap_fence;
   intel->first_swap_fence = NULL;

   /* The LOCK_HARDWARE is required for the cliprects.  Buffer offsets
    * should work regardless.
    */
   LOCK_HARDWARE(intel);

   if (dPriv && dPriv->numClipRects) {
      struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
      struct intel_region *src, *dst;
      int nbox = dPriv->numClipRects;
      drm_clip_rect_t *pbox = dPriv->pClipRects;
      int cpp;
      int src_pitch, dst_pitch;
      unsigned short src_x, src_y;
      int BR13, CMD;
      int i;

      src = intel_get_rb_region(&intel_fb->Base, BUFFER_BACK_LEFT);
      dst = intel_get_rb_region(&intel_fb->Base, BUFFER_FRONT_LEFT);

      src_pitch = src->pitch * src->cpp;
      dst_pitch = dst->pitch * dst->cpp;

      cpp = src->cpp;

      ASSERT(intel_fb);
      ASSERT(intel_fb->Base.Name == 0);    /* Not a user-created FBO */
      ASSERT(src);
      ASSERT(dst);
      ASSERT(src->cpp == dst->cpp);

      if (cpp == 2) {
	 BR13 = (0xCC << 16) | (1 << 24);
	 CMD = XY_SRC_COPY_BLT_CMD;
      }
      else {
	 BR13 = (0xCC << 16) | (1 << 24) | (1 << 25);
	 CMD = XY_SRC_COPY_BLT_CMD | XY_BLT_WRITE_ALPHA | XY_BLT_WRITE_RGB;
      }

#ifndef I915
      if (src->tiled) {
	 CMD |= XY_SRC_TILED;
	 src_pitch /= 4;
      }
      if (dst->tiled) {
	 CMD |= XY_DST_TILED;
	 dst_pitch /= 4;
      }
#endif
      /* do space/cliprects check before going any further */
      intel_batchbuffer_require_space(intel->batch, 8 * 4, REFERENCES_CLIPRECTS);
   again:
      ret = dri_bufmgr_check_aperture_space(dst->buffer);
      ret |= dri_bufmgr_check_aperture_space(src->buffer);
      
      if (ret) {
	intel_batchbuffer_flush(intel->batch);
	goto again;
      }
      
      for (i = 0; i < nbox; i++, pbox++) {
	 drm_clip_rect_t box = *pbox;

	 if (rect) {
	    if (!intel_intersect_cliprects(&box, &box, rect))
	       continue;
	 }

	 if (box.x1 >= box.x2 ||
	     box.y1 >= box.y2)
	    continue;

	 assert(box.x1 < box.x2);
	 assert(box.y1 < box.y2);
	 src_x = box.x1 - dPriv->x + dPriv->backX;
	 src_y = box.y1 - dPriv->y + dPriv->backY;

	 BEGIN_BATCH(8, REFERENCES_CLIPRECTS);
	 OUT_BATCH(CMD);
	 OUT_BATCH(BR13 | dst_pitch);
	 OUT_BATCH((box.y1 << 16) | box.x1);
	 OUT_BATCH((box.y2 << 16) | box.x2);

	 OUT_RELOC(dst->buffer, DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_WRITE, 0);
	 OUT_BATCH((src_y << 16) | src_x);
	 OUT_BATCH(src_pitch);
	 OUT_RELOC(src->buffer, DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_READ, 0);
	 ADVANCE_BATCH();
      }

      if (intel->first_swap_fence)
	 dri_fence_unreference(intel->first_swap_fence);
      intel_batchbuffer_flush(intel->batch);
      intel->first_swap_fence = intel->batch->last_fence;
      if (intel->first_swap_fence)
	 dri_fence_reference(intel->first_swap_fence);
   }

   UNLOCK_HARDWARE(intel);
}




void
intelEmitFillBlit(struct intel_context *intel,
		  GLuint cpp,
		  GLshort dst_pitch,
		  dri_bo *dst_buffer,
		  GLuint dst_offset,
		  GLboolean dst_tiled,
		  GLshort x, GLshort y,
		  GLshort w, GLshort h,
		  GLuint color)
{
   GLuint BR13, CMD;
   BATCH_LOCALS;

   dst_pitch *= cpp;

   switch (cpp) {
   case 1:
   case 2:
   case 3:
      BR13 = (0xF0 << 16) | (1 << 24);
      CMD = XY_COLOR_BLT_CMD;
      break;
   case 4:
      BR13 = (0xF0 << 16) | (1 << 24) | (1 << 25);
      CMD = XY_COLOR_BLT_CMD | XY_BLT_WRITE_ALPHA | XY_BLT_WRITE_RGB;
      break;
   default:
      return;
   }
#ifndef I915
   if (dst_tiled) {
      CMD |= XY_DST_TILED;
      dst_pitch /= 4;
   }
#endif

   DBG("%s dst:buf(%p)/%d+%d %d,%d sz:%dx%d\n",
       __FUNCTION__, dst_buffer, dst_pitch, dst_offset, x, y, w, h);

   assert(w > 0);
   assert(h > 0);

   BEGIN_BATCH(6, NO_LOOP_CLIPRECTS);
   OUT_BATCH(CMD);
   OUT_BATCH(BR13 | dst_pitch);
   OUT_BATCH((y << 16) | x);
   OUT_BATCH(((y + h) << 16) | (x + w));
   OUT_RELOC(dst_buffer, DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_WRITE, dst_offset);
   OUT_BATCH(color);
   ADVANCE_BATCH();
}

static GLuint translate_raster_op(GLenum logicop)
{
   switch(logicop) {
   case GL_CLEAR: return 0x00;
   case GL_AND: return 0x88;
   case GL_AND_REVERSE: return 0x44;
   case GL_COPY: return 0xCC;
   case GL_AND_INVERTED: return 0x22;
   case GL_NOOP: return 0xAA;
   case GL_XOR: return 0x66;
   case GL_OR: return 0xEE;
   case GL_NOR: return 0x11;
   case GL_EQUIV: return 0x99;
   case GL_INVERT: return 0x55;
   case GL_OR_REVERSE: return 0xDD;
   case GL_COPY_INVERTED: return 0x33;
   case GL_OR_INVERTED: return 0xBB;
   case GL_NAND: return 0x77;
   case GL_SET: return 0xFF;
   default: return 0;
   }
}


/* Copy BitBlt
 */
void
intelEmitCopyBlit(struct intel_context *intel,
		  GLuint cpp,
		  GLshort src_pitch,
		  dri_bo *src_buffer,
		  GLuint src_offset,
		  GLboolean src_tiled,
		  GLshort dst_pitch,
		  dri_bo *dst_buffer,
		  GLuint dst_offset,
		  GLboolean dst_tiled,
		  GLshort src_x, GLshort src_y,
		  GLshort dst_x, GLshort dst_y,
		  GLshort w, GLshort h,
		  GLenum logic_op)
{
   GLuint CMD, BR13;
   int dst_y2 = dst_y + h;
   int dst_x2 = dst_x + w;
   int ret;
   BATCH_LOCALS;

   /* do space/cliprects check before going any further */
   intel_batchbuffer_require_space(intel->batch, 8 * 4, NO_LOOP_CLIPRECTS);
 again:
   ret = dri_bufmgr_check_aperture_space(dst_buffer);
   ret |= dri_bufmgr_check_aperture_space(src_buffer);
   if (ret) {
     intel_batchbuffer_flush(intel->batch);
     goto again;
   }

   DBG("%s src:buf(%p)/%d+%d %d,%d dst:buf(%p)/%d+%d %d,%d sz:%dx%d\n",
       __FUNCTION__,
       src_buffer, src_pitch, src_offset, src_x, src_y,
       dst_buffer, dst_pitch, dst_offset, dst_x, dst_y, w, h);

   src_pitch *= cpp;
   dst_pitch *= cpp;

   BR13 = translate_raster_op(logic_op) << 16;

   switch (cpp) {
   case 1:
   case 2:
   case 3:
      BR13 |= (1 << 24);
      CMD = XY_SRC_COPY_BLT_CMD;
      break;
   case 4:
      BR13 |= (1 << 24) | (1 << 25);
      CMD = XY_SRC_COPY_BLT_CMD | XY_BLT_WRITE_ALPHA | XY_BLT_WRITE_RGB;
      break;
   default:
      return;
   }