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/**************************************************************************

 *

 * 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 "main/mtypes.h"

#include "main/context.h"

#include "main/enums.h"

#include "main/colormac.h"

#include "main/fbobject.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"

#include "intel_batchbuffer.h"

#include "intel_mipmap_tree.h"

#define FILE_DEBUG_FLAG DEBUG_BLIT

static void

intel_miptree_set_alpha_to_one(struct intel_context *intel,

                               struct intel_mipmap_tree *mt,

                               int x, int y, int width, int height);

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;

   }

}

static uint32_t

br13_for_cpp(int cpp)

{

   switch (cpp) {

   case 4:

      return BR13_8888;

      break;

   case 2:

      return BR13_565;

      break;

   case 1:

      return BR13_8;

      break;

   default:

      assert(0);

      return 0;

   }

}

/**

 * Implements a rectangular block transfer (blit) of pixels between two

 * miptrees.

 *

 * Our blitter can operate on 1, 2, or 4-byte-per-pixel data, with generous,

 * but limited, pitches and sizes allowed.

 *

 * The src/dst coordinates are relative to the given level/slice of the

 * miptree.

 *

 * If @src_flip or @dst_flip is set, then the rectangle within that miptree

 * will be inverted (including scanline order) when copying.  This is common

 * in GL when copying between window system and user-created

 * renderbuffers/textures.

 */

bool

intel_miptree_blit(struct intel_context *intel,

                   struct intel_mipmap_tree *src_mt,

                   int src_level, int src_slice,

                   uint32_t src_x, uint32_t src_y, bool src_flip,

                   struct intel_mipmap_tree *dst_mt,

                   int dst_level, int dst_slice,

                   uint32_t dst_x, uint32_t dst_y, bool dst_flip,

                   uint32_t width, uint32_t height,

                   GLenum logicop)

{

   /* No sRGB decode or encode is done by the hardware blitter, which is

    * consistent with what we want in the callers (glCopyTexSubImage(),

    * glBlitFramebuffer(), texture validation, etc.).

    */

   gl_format src_format = _mesa_get_srgb_format_linear(src_mt->format);

   gl_format dst_format = _mesa_get_srgb_format_linear(dst_mt->format);

   /* The blitter doesn't support doing any format conversions.  We do also

    * support blitting ARGB8888 to XRGB8888 (trivial, the values dropped into

    * the X channel don't matter), and XRGB8888 to ARGB8888 by setting the A

    * channel to 1.0 at the end.

    */

   if (src_format != dst_format &&

      ((src_format != MESA_FORMAT_ARGB8888 &&

        src_format != MESA_FORMAT_XRGB8888) ||

       (dst_format != MESA_FORMAT_ARGB8888 &&

        dst_format != MESA_FORMAT_XRGB8888))) {

      perf_debug("%s: Can't use hardware blitter from %s to %s, "

                 "falling back.\n", __FUNCTION__,

                 _mesa_get_format_name(src_format),

                 _mesa_get_format_name(dst_format));

      return false;

   }

   /* According to the Ivy Bridge PRM, Vol1 Part4, section 1.2.1.2 (Graphics

    * Data Size Limitations):

    *

    *    The BLT engine is capable of transferring very large quantities of

    *    graphics data. Any graphics data read from and written to the

    *    destination is permitted to represent a number of pixels that

    *    occupies up to 65,536 scan lines and up to 32,768 bytes per scan line

    *    at the destination. The maximum number of pixels that may be

    *    represented per scan line’s worth of graphics data depends on the

    *    color depth.

    *

    * Furthermore, intelEmitCopyBlit (which is called below) uses a signed

    * 16-bit integer to represent buffer pitch, so it can only handle buffer

    * pitches < 32k.

    *

    * As a result of these two limitations, we can only use the blitter to do

    * this copy when the region's pitch is less than 32k.

    */

   if (src_mt->region->pitch > 32768 ||

       dst_mt->region->pitch > 32768) {

      perf_debug("Falling back due to >32k pitch\n");

      return false;

   }

   if (src_flip)

      src_y = src_mt->level[src_level].height - src_y - height;

   if (dst_flip)

      dst_y = dst_mt->level[dst_level].height - dst_y - height;

   int src_pitch = src_mt->region->pitch;

   if (src_flip != dst_flip)

      src_pitch = -src_pitch;

   uint32_t src_image_x, src_image_y;

   intel_miptree_get_image_offset(src_mt, src_level, src_slice,

                                  &src_image_x, &src_image_y);

   src_x += src_image_x;

   src_y += src_image_y;

   uint32_t dst_image_x, dst_image_y;

   intel_miptree_get_image_offset(dst_mt, dst_level, dst_slice,

                                  &dst_image_x, &dst_image_y);

   dst_x += dst_image_x;

   dst_y += dst_image_y;

   if (!intelEmitCopyBlit(intel,

                          src_mt->cpp,

                          src_pitch,

                          src_mt->region->bo, src_mt->offset,

                          src_mt->region->tiling,

                          dst_mt->region->pitch,

                          dst_mt->region->bo, dst_mt->offset,

                          dst_mt->region->tiling,

                          src_x, src_y,

                          dst_x, dst_y,

                          width, height,

                          logicop)) {

      return false;

   }

   if (src_mt->format == MESA_FORMAT_XRGB8888 &&

       dst_mt->format == MESA_FORMAT_ARGB8888) {

      intel_miptree_set_alpha_to_one(intel, dst_mt,

                                     dst_x, dst_y,

                                     width, height);

   }

   return true;

}

/* Copy BitBlt

 */

bool

intelEmitCopyBlit(struct intel_context *intel,

		  GLuint cpp,

		  GLshort src_pitch,

		  drm_intel_bo *src_buffer,

		  GLuint src_offset,

		  uint32_t src_tiling,

		  GLshort dst_pitch,

		  drm_intel_bo *dst_buffer,

		  GLuint dst_offset,

		  uint32_t dst_tiling,

		  GLshort src_x, GLshort src_y,

		  GLshort dst_x, GLshort dst_y,

		  GLshort w, GLshort h,

		  GLenum logic_op)

{

   GLuint CMD, BR13, pass = 0;

   int dst_y2 = dst_y + h;

   int dst_x2 = dst_x + w;

   drm_intel_bo *aper_array[3];

   bool dst_y_tiled = dst_tiling == I915_TILING_Y;

   bool src_y_tiled = src_tiling == I915_TILING_Y;

   BATCH_LOCALS;

   if (dst_tiling != I915_TILING_NONE) {

      if (dst_offset & 4095)

	 return false;

   }

   if (src_tiling != I915_TILING_NONE) {

      if (src_offset & 4095)

	 return false;

   }

   if (dst_y_tiled || src_y_tiled)

      return false;

   /* do space check before going any further */

   do {

       aper_array[0] = intel->batch.bo;

       aper_array[1] = dst_buffer;

       aper_array[2] = src_buffer;

       if (dri_bufmgr_check_aperture_space(aper_array, 3) != 0) {

           intel_batchbuffer_flush(intel);

           pass++;

       } else

           break;

   } while (pass < 2);

   if (pass >= 2)

      return false;

   intel_batchbuffer_require_space(intel, 8 * 4);

   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);

   /* Blit pitch must be dword-aligned.  Otherwise, the hardware appears to drop

    * the low bits.

    */

   if (src_pitch % 4 != 0 || dst_pitch % 4 != 0)

      return false;

   /* For big formats (such as floating point), do the copy using 16 or 32bpp

    * and multiply the coordinates.

    */

   if (cpp > 4) {

      if (cpp % 4 == 2) {

         dst_x *= cpp / 2;

         dst_x2 *= cpp / 2;

         src_x *= cpp / 2;

         cpp = 2;

      } else {

         assert(cpp % 4 == 0);

         dst_x *= cpp / 4;

         dst_x2 *= cpp / 4;

         src_x *= cpp / 4;

         cpp = 4;

      }

   }

   BR13 = br13_for_cpp(cpp) | translate_raster_op(logic_op) << 16;

   switch (cpp) {

   case 1:

   case 2:

      CMD = XY_SRC_COPY_BLT_CMD;

      break;

   case 4:

      CMD = XY_SRC_COPY_BLT_CMD | XY_BLT_WRITE_ALPHA | XY_BLT_WRITE_RGB;

      break;

   default:

      return false;

   }

   if (dst_y2 <= dst_y || dst_x2 <= dst_x) {

      return true;

   }

   assert(dst_x < dst_x2);

   assert(dst_y < dst_y2);

   BEGIN_BATCH(8);

   OUT_BATCH(CMD | (8 - 2));

   OUT_BATCH(BR13 | (uint16_t)dst_pitch);

   OUT_BATCH((dst_y << 16) | dst_x);

   OUT_BATCH((dst_y2 << 16) | dst_x2);

   OUT_RELOC_FENCED(dst_buffer,

		    I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,

		    dst_offset);

   OUT_BATCH((src_y << 16) | src_x);

   OUT_BATCH((uint16_t)src_pitch);

   OUT_RELOC_FENCED(src_buffer,

		    I915_GEM_DOMAIN_RENDER, 0,

		    src_offset);

   ADVANCE_BATCH();

   intel_batchbuffer_emit_mi_flush(intel);

   return true;

}

/**

 * Use blitting to clear the renderbuffers named by 'flags'.

 * Note: we can't use the ctx->DrawBuffer->_ColorDrawBufferIndexes field

 * since that might include software renderbuffers or renderbuffers

 * which we're clearing with triangles.

 * \param mask  bitmask of BUFFER_BIT_* values indicating buffers to clear

 */

GLbitfield

intelClearWithBlit(struct gl_context *ctx, GLbitfield mask)

{

   struct intel_context *intel = intel_context(ctx);

   struct gl_framebuffer *fb = ctx->DrawBuffer;

   GLuint clear_depth_value, clear_depth_mask;

   GLint cx, cy, cw, ch;

   GLbitfield fail_mask = 0;

   BATCH_LOCALS;

   /* Note: we don't use this function on Gen7+ hardware, so we can safely

    * ignore fast color clear issues.

    */

   assert(intel->gen < 7);

   /*

    * Compute values for clearing the buffers.

    */

   clear_depth_value = 0;

   clear_depth_mask = 0;

   if (mask & BUFFER_BIT_DEPTH) {

      clear_depth_value = (GLuint) (fb->_DepthMax * ctx->Depth.Clear);

      clear_depth_mask = XY_BLT_WRITE_RGB;

   }

   if (mask & BUFFER_BIT_STENCIL) {

      clear_depth_value |= (ctx->Stencil.Clear & 0xff) << 24;

      clear_depth_mask |= XY_BLT_WRITE_ALPHA;

   }

   cx = fb->_Xmin;

   if (_mesa_is_winsys_fbo(fb))

      cy = ctx->DrawBuffer->Height - fb->_Ymax;

   else

      cy = fb->_Ymin;

   cw = fb->_Xmax - fb->_Xmin;

   ch = fb->_Ymax - fb->_Ymin;

   if (cw == 0 || ch == 0)

      return 0;

   /* Loop over all renderbuffers */

   mask &= (1 << BUFFER_COUNT) - 1;

   while (mask) {

      GLuint buf = ffs(mask) - 1;

      bool is_depth_stencil = buf == BUFFER_DEPTH || buf == BUFFER_STENCIL;

      struct intel_renderbuffer *irb;

      int x1, y1, x2, y2;

      uint32_t clear_val;

      uint32_t BR13, CMD;

      struct intel_region *region;

      int pitch, cpp;

      drm_intel_bo *aper_array[2];

      mask &= ~(1 << buf);

      irb = intel_get_renderbuffer(fb, buf);

      if (irb && irb->mt) {

	 region = irb->mt->region;

	 assert(region);

	 assert(region->bo);

      } else {

         fail_mask |= 1 << buf;

         continue;

      }

      /* OK, clear this renderbuffer */

      x1 = cx + irb->draw_x;

      y1 = cy + irb->draw_y;

      x2 = cx + cw + irb->draw_x;

      y2 = cy + ch + irb->draw_y;

      pitch = region->pitch;

      cpp = region->cpp;

      DBG("%s dst:buf(%p)/%d %d,%d sz:%dx%d\n",

	  __FUNCTION__,

	  region->bo, pitch,

	  x1, y1, x2 - x1, y2 - y1);

      BR13 = 0xf0 << 16;

      CMD = XY_COLOR_BLT_CMD;

      /* Setup the blit command */

      if (cpp == 4) {

	 if (is_depth_stencil) {

	    CMD |= clear_depth_mask;

	 } else {

	    /* clearing RGBA */

	    CMD |= XY_BLT_WRITE_ALPHA | XY_BLT_WRITE_RGB;

	 }

      }

      assert(region->tiling != I915_TILING_Y);

      BR13 |= pitch;

      if (is_depth_stencil) {

	 clear_val = clear_depth_value;

      } else {

	 uint8_t clear[4];

	 GLfloat *color = ctx->Color.ClearColor.f;

	 _mesa_unclamped_float_rgba_to_ubyte(clear, color);

	 switch (intel_rb_format(irb)) {

	 case MESA_FORMAT_ARGB8888:

	 case MESA_FORMAT_XRGB8888:

	    clear_val = PACK_COLOR_8888(clear[3], clear[0],

					clear[1], clear[2]);

	    break;

	 case MESA_FORMAT_RGB565:

	    clear_val = PACK_COLOR_565(clear[0], clear[1], clear[2]);

	    break;

	 case MESA_FORMAT_ARGB4444:

	    clear_val = PACK_COLOR_4444(clear[3], clear[0],

					clear[1], clear[2]);

	    break;

	 case MESA_FORMAT_ARGB1555:

	    clear_val = PACK_COLOR_1555(clear[3], clear[0],

					clear[1], clear[2]);

	    break;

	 case MESA_FORMAT_A8:

	    clear_val = PACK_COLOR_8888(clear[3], clear[3],

					clear[3], clear[3]);

	    break;

	 default:

	    fail_mask |= 1 << buf;

	    continue;

	 }

      }

      BR13 |= br13_for_cpp(cpp);

      assert(x1 < x2);

      assert(y1 < y2);

      /* do space check before going any further */

      aper_array[0] = intel->batch.bo;

      aper_array[1] = region->bo;

      if (drm_intel_bufmgr_check_aperture_space(aper_array,

						ARRAY_SIZE(aper_array)) != 0) {

	 intel_batchbuffer_flush(intel);

      }

      BEGIN_BATCH(6);

      OUT_BATCH(CMD | (6 - 2));

      OUT_BATCH(BR13);

      OUT_BATCH((y1 << 16) | x1);

      OUT_BATCH((y2 << 16) | x2);

      OUT_RELOC_FENCED(region->bo,

		       I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,

		       0);

      OUT_BATCH(clear_val);

      ADVANCE_BATCH();

      if (intel->always_flush_cache)

	 intel_batchbuffer_emit_mi_flush(intel);

      if (buf == BUFFER_DEPTH || buf == BUFFER_STENCIL)

	 mask &= ~(BUFFER_BIT_DEPTH | BUFFER_BIT_STENCIL);

   }

   return fail_mask;

}

bool

intelEmitImmediateColorExpandBlit(struct intel_context *intel,

				  GLuint cpp,

				  GLubyte *src_bits, GLuint src_size,

				  GLuint fg_color,

				  GLshort dst_pitch,

				  drm_intel_bo *dst_buffer,

				  GLuint dst_offset,

				  uint32_t dst_tiling,

				  GLshort x, GLshort y,

				  GLshort w, GLshort h,

				  GLenum logic_op)

{

   int dwords = ALIGN(src_size, 8) / 4;

   uint32_t opcode, br13, blit_cmd;

   if (dst_tiling != I915_TILING_NONE) {

      if (dst_offset & 4095)

	 return false;

      if (dst_tiling == I915_TILING_Y)

	 return false;

   }

   assert( logic_op - GL_CLEAR >= 0 );

   assert( logic_op - GL_CLEAR < 0x10 );

   assert(dst_pitch > 0);

   if (w < 0 || h < 0)

      return true;

   DBG("%s dst:buf(%p)/%d+%d %d,%d sz:%dx%d, %d bytes %d dwords\n",

       __FUNCTION__,

       dst_buffer, dst_pitch, dst_offset, x, y, w, h, src_size, dwords);

   intel_batchbuffer_require_space(intel,

				   (8 * 4) +

				   (3 * 4) +

				   dwords * 4);

   opcode = XY_SETUP_BLT_CMD;

   if (cpp == 4)

      opcode |= XY_BLT_WRITE_ALPHA | XY_BLT_WRITE_RGB;

   br13 = dst_pitch | (translate_raster_op(logic_op) << 16) | (1 << 29);

   br13 |= br13_for_cpp(cpp);

   blit_cmd = XY_TEXT_IMMEDIATE_BLIT_CMD | XY_TEXT_BYTE_PACKED; /* packing? */

   if (dst_tiling != I915_TILING_NONE)

      blit_cmd |= XY_DST_TILED;

   BEGIN_BATCH(8 + 3);

   OUT_BATCH(opcode | (8 - 2));

   OUT_BATCH(br13);

   OUT_BATCH((0 << 16) | 0); /* clip x1, y1 */

   OUT_BATCH((100 << 16) | 100); /* clip x2, y2 */

   OUT_RELOC_FENCED(dst_buffer,

		    I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,

		    dst_offset);

   OUT_BATCH(0); /* bg */

   OUT_BATCH(fg_color); /* fg */

   OUT_BATCH(0); /* pattern base addr */

   OUT_BATCH(blit_cmd | ((3 - 2) + dwords));

   OUT_BATCH((y << 16) | x);

   OUT_BATCH(((y + h) << 16) | (x + w));

   ADVANCE_BATCH();

   intel_batchbuffer_data(intel, src_bits, dwords * 4);

   intel_batchbuffer_emit_mi_flush(intel);

   return true;

}

/* We don't have a memmove-type blit like some other hardware, so we'll do a

 * rectangular blit covering a large space, then emit 1-scanline blit at the

 * end to cover the last if we need.

 */

void

intel_emit_linear_blit(struct intel_context *intel,

		       drm_intel_bo *dst_bo,

		       unsigned int dst_offset,

		       drm_intel_bo *src_bo,

		       unsigned int src_offset,

		       unsigned int size)

{

   struct gl_context *ctx = &intel->ctx;

   GLuint pitch, height;

   bool ok;

   /* The pitch given to the GPU must be DWORD aligned, and

    * we want width to match pitch. Max width is (1 << 15 - 1),

    * rounding that down to the nearest DWORD is 1 << 15 - 4

    */

   pitch = ROUND_DOWN_TO(MIN2(size, (1 << 15) - 1), 4);

   height = (pitch == 0) ? 1 : size / pitch;

   ok = intelEmitCopyBlit(intel, 1,

			  pitch, src_bo, src_offset, I915_TILING_NONE,

			  pitch, dst_bo, dst_offset, I915_TILING_NONE,

			  0, 0, /* src x/y */

			  0, 0, /* dst x/y */

			  pitch, height, /* w, h */

			  GL_COPY);

   if (!ok)

      _mesa_problem(ctx, "Failed to linear blit %dx%d\n", pitch, height);

   src_offset += pitch * height;

   dst_offset += pitch * height;

   size -= pitch * height;

   assert (size < (1 << 15));

   pitch = ALIGN(size, 4);

   if (size != 0) {

      ok = intelEmitCopyBlit(intel, 1,

			     pitch, src_bo, src_offset, I915_TILING_NONE,

			     pitch, dst_bo, dst_offset, I915_TILING_NONE,

			     0, 0, /* src x/y */

			     0, 0, /* dst x/y */

			     size, 1, /* w, h */

			     GL_COPY);

      if (!ok)

         _mesa_problem(ctx, "Failed to linear blit %dx%d\n", size, 1);

   }

}

/**

 * Used to initialize the alpha value of an ARGB8888 miptree after copying

 * into it from an XRGB8888 source.

 *

 * This is very common with glCopyTexImage2D().  Note that the coordinates are

 * relative to the start of the miptree, not relative to a slice within the

 * miptree.

 */

static void

intel_miptree_set_alpha_to_one(struct intel_context *intel,

                              struct intel_mipmap_tree *mt,

                              int x, int y, int width, int height)

{

   struct intel_region *region = mt->region;

   uint32_t BR13, CMD;

   int pitch, cpp;

   drm_intel_bo *aper_array[2];

   BATCH_LOCALS;

   pitch = region->pitch;

   cpp = region->cpp;

   DBG("%s dst:buf(%p)/%d %d,%d sz:%dx%d\n",

       __FUNCTION__, region->bo, pitch, x, y, width, height);

   BR13 = br13_for_cpp(cpp) | 0xf0 << 16;

   CMD = XY_COLOR_BLT_CMD;

   CMD |= XY_BLT_WRITE_ALPHA;

   BR13 |= pitch;

   /* do space check before going any further */

   aper_array[0] = intel->batch.bo;

   aper_array[1] = region->bo;

   if (drm_intel_bufmgr_check_aperture_space(aper_array,

					     ARRAY_SIZE(aper_array)) != 0) {

      intel_batchbuffer_flush(intel);

   }

   BEGIN_BATCH(6);

   OUT_BATCH(CMD | (6 - 2));

   OUT_BATCH(BR13);

   OUT_BATCH((y << 16) | x);

   OUT_BATCH(((y + height) << 16) | (x + width));

   OUT_RELOC_FENCED(region->bo,

		    I915_GEM_DOMAIN_RENDER, I915_GEM_DOMAIN_RENDER,

		    0);

   OUT_BATCH(0xffffffff); /* white, but only alpha gets written */

   ADVANCE_BATCH();

   intel_batchbuffer_emit_mi_flush(intel);

}