/**
 ******************************************************************************
 * Xenia : Xbox 360 Emulator Research Project                                 *
 ******************************************************************************
 * Copyright 2022 Ben Vanik. All rights reserved.                             *
 * Released under the BSD license - see LICENSE in the root for more details. *
 ******************************************************************************
 */

#include "endian.xesli"
#include "pixel_formats.xesli"
#define XE_RESOLVE_COPY_EDRAM_IS_UINT_VECTOR_BUFFER
#include "resolve.xesli"

xesl_writeTypedStorageBuffer_declare(xesl_uint4, xe_resolve_dest, set=1,
                                     binding=0, u0, space0)
#define xesl_localSize_x 8
#define xesl_localSize_y 8
#define xesl_localSize_z 1
xesl_entry_bindings_begin_compute
  XE_RESOLVE_PUSH_CONSTANTS_BINDING
  xesl_entry_binding_next
  xesl_writeTypedStorageBuffer_binding(xesl_uint4, xe_resolve_dest,
                                       buffer(1))
  xesl_entry_binding_next
  XE_RESOLVE_COPY_EDRAM_BINDING
xesl_entry_bindings_end_inputs_begin_compute
  xesl_entry_input_globalInvocationID
xesl_entry_inputs_end_code_begin_compute
  // 1 thread = 4 host pixels.
  // 1 pixel per thread is 160% as slow on Nvidia Pascal, 8 pixels per thread is
  // 115% as slow.
  XeResolveInfo resolve_info =
      XeResolveGetInfo(xesl_function_call_pushConstants);
  xesl_uint2 pixel_index = xesl_GlobalInvocationID.xy << xesl_uint2(2u, 0u);
  // Group height can't cross resolve granularity, Y overflow check not needed.
  xesl_dont_flatten
  if (pixel_index.x >= resolve_info.width_div_8_scaled << 3u) {
    return;
  }
  xesl_float4 pixel_0, pixel_1, pixel_2, pixel_3;
  XeResolveLoad4RGBAColors(
      xesl_function_call_uintVectorBuffer(xe_resolve_edram)
      xesl_function_call_next_after_uintVectorBuffer
      resolve_info,
      XeResolveColorCopySourcePixelAddressIntsYDuplicating(resolve_info,
                                                           pixel_index),
      pixel_0, pixel_1, pixel_2, pixel_3);
  if (resolve_info.duplicate_second_host_pixel.x && pixel_index.x == 0u) {
    pixel_0 = pixel_1;
  }
  xesl_writeTypedStorageBufferStore(
      xe_resolve_dest,
      XeResolveDestPixelAddress(resolve_info, pixel_index, 2u) >> 4u,
      XeEndianSwap32(XePack32bpp4Pixels(pixel_0, pixel_1, pixel_2, pixel_3,
                                        resolve_info.dest_format),
                     resolve_info.dest_endian_128));
xesl_entry_code_end_compute