src/gallium/drivers/i915/i915_blit.c

/**************************************************************************
 * 
 * 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 "i915_blit.h"
#include "i915_reg.h"
#include "i915_batch.h"
#include "i915_debug.h"


void
i915_fill_blit(struct i915_context *i915,
               unsigned cpp,
               unsigned rgba_mask,
               unsigned short dst_pitch,
               struct i915_winsys_buffer *dst_buffer,
               unsigned dst_offset,
               short x, short y, 
               short w, short h, 
               unsigned color)
{
   unsigned BR13, CMD;


   I915_DBG(DBG_BLIT, "%s dst:buf(%p)/%d+%d %d,%d sz:%dx%d\n",
            __FUNCTION__, dst_buffer, dst_pitch, dst_offset, x, y, w, h);

   if(!i915_winsys_validate_buffers(i915->batch, &dst_buffer, 1)) {
      FLUSH_BATCH(NULL);
      assert(i915_winsys_validate_buffers(i915->batch, &dst_buffer, 1));
   }

   switch (cpp) {
   case 1:
   case 2:
   case 3:
      BR13 = (((int) dst_pitch) & 0xffff) |
         (0xF0 << 16) | (1 << 24);
      CMD = XY_COLOR_BLT_CMD;
      break;
   case 4:
      BR13 = (((int) dst_pitch) & 0xffff) |
         (0xF0 << 16) | (1 << 24) | (1 << 25);
      CMD = (XY_COLOR_BLT_CMD | rgba_mask);
      break;
   default:
      return;
   }

   if (!BEGIN_BATCH(6)) {
      FLUSH_BATCH(NULL);
      assert(BEGIN_BATCH(6));
   }
   OUT_BATCH(CMD);
   OUT_BATCH(BR13);
   OUT_BATCH((y << 16) | x);
   OUT_BATCH(((y + h) << 16) | (x + w));
   OUT_RELOC_FENCED(dst_buffer, I915_USAGE_2D_TARGET, dst_offset);
   OUT_BATCH(color);

   i915_set_flush_dirty(i915, I915_FLUSH_CACHE);
}

void
i915_copy_blit(struct i915_context *i915,
               unsigned cpp,
               unsigned short src_pitch,
               struct i915_winsys_buffer *src_buffer,
               unsigned src_offset,
               unsigned short dst_pitch,
               struct i915_winsys_buffer *dst_buffer,
               unsigned dst_offset,
               short src_x, short src_y,
               short dst_x, short dst_y, 
               short w, short h)
{
   unsigned CMD, BR13;
   int dst_y2 = dst_y + h;
   int dst_x2 = dst_x + w;
   struct i915_winsys_buffer *buffers[2] = {src_buffer, dst_buffer};


   I915_DBG(DBG_BLIT,
            "%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);

   if(!i915_winsys_validate_buffers(i915->batch, buffers, 2)) {
      FLUSH_BATCH(NULL);
      assert(i915_winsys_validate_buffers(i915->batch, buffers, 2));
   }

   switch (cpp) {
   case 1:
   case 2:
   case 3:
      BR13 = (((int) dst_pitch) & 0xffff) |
         (0xCC << 16) | (1 << 24);
      CMD = XY_SRC_COPY_BLT_CMD;
      break;
   case 4:
      BR13 = (((int) dst_pitch) & 0xffff) |
             (0xCC << 16) | (1 << 24) | (1 << 25);
      CMD = (XY_SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
            XY_SRC_COPY_BLT_WRITE_RGB);
      break;
   default:
      return;
   }

   if (dst_y2 < dst_y || dst_x2 < dst_x) {
      return;
   }

   /* Hardware can handle negative pitches but loses the ability to do
    * proper overlapping blits in that case.  We don't really have a
    * need for either at this stage.
    */
   assert (dst_pitch > 0 && src_pitch > 0);

   if (!BEGIN_BATCH(8)) {
      FLUSH_BATCH(NULL);
      assert(BEGIN_BATCH(8));
   }
   OUT_BATCH(CMD);
   OUT_BATCH(BR13);
   OUT_BATCH((dst_y << 16) | dst_x);
   OUT_BATCH((dst_y2 << 16) | dst_x2);
   OUT_RELOC_FENCED(dst_buffer, I915_USAGE_2D_TARGET, dst_offset);
   OUT_BATCH((src_y << 16) | src_x);
   OUT_BATCH(((int) src_pitch & 0xffff));
   OUT_RELOC_FENCED(src_buffer, I915_USAGE_2D_SOURCE, src_offset);

   i915_set_flush_dirty(i915, I915_FLUSH_CACHE);
}