text: /**************************************************************************
   * 
   * 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);
  
     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, 1)) {
        FLUSH_BATCH(NULL);
        assert(BEGIN_BATCH(6, 1));
     }
     OUT_BATCH(CMD);
     OUT_BATCH(BR13);
     OUT_BATCH((y << 16) | x);
     OUT_BATCH(((y + h) << 16) | (x + w));
     OUT_RELOC(dst_buffer, I915_USAGE_2D_TARGET, dst_offset);
     OUT_BATCH(color);
  }
  
  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;
  
  
     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);
  
     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, 2)) {
        FLUSH_BATCH(NULL);
        assert(BEGIN_BATCH(8, 2));
     }
     OUT_BATCH(CMD);
     OUT_BATCH(BR13);
     OUT_BATCH((dst_y << 16) | dst_x);
     OUT_BATCH((dst_y2 << 16) | dst_x2);
     OUT_RELOC(dst_buffer, I915_USAGE_2D_TARGET, dst_offset);
     OUT_BATCH((src_y << 16) | src_x);
     OUT_BATCH(((int) src_pitch & 0xffff));
     OUT_RELOC(src_buffer, I915_USAGE_2D_SOURCE, src_offset);
  }
  