kc3-lang/angle/src/image_util/loadimage_astc.cpp

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• Hash : 025504b9
  Author :
  Date : 2022-10-17T17:03:03
  

  Pass worker pools to image load functions
  
  In preparation for the ASTC decoder using threaded decoding.
  
  Bug: b/250688943
  Change-Id: I70d669bcb57b900dbb633304182e174aec362203
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3961339
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Greg Schlomoff <gregschlom@google.com>
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  

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• src/image_util/loadimage_astc.cpp

• //
  // Copyright 2022 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // loadimage_astc.cpp: Decodes ASTC encoded textures.
  
  #ifdef ANGLE_HAS_ASTCENC
  #    include <astcenc.h>
  #endif
  
  #include "image_util/loadimage.h"
  
  namespace angle
  {
  
  void LoadASTCToRGBA8Inner(const ImageLoadContext &context,
                            size_t width,
                            size_t height,
                            size_t depth,
                            uint32_t blockWidth,
                            uint32_t blockHeight,
                            const uint8_t *input,
                            size_t inputRowPitch,
                            size_t inputDepthPitch,
                            uint8_t *output,
                            size_t outputRowPitch,
                            size_t outputDepthPitch)
  {
  #ifdef ANGLE_HAS_ASTCENC
      astcenc_config config;
  
      constexpr unsigned int kBlockZ = 1;
  
      const float kQuality               = ASTCENC_PRE_MEDIUM;
      constexpr astcenc_profile kProfile = ASTCENC_PRF_LDR;
  
      astcenc_error status;
      status = astcenc_config_init(kProfile, blockWidth, blockHeight, kBlockZ, kQuality,
                                   ASTCENC_FLG_DECOMPRESS_ONLY, &config);
      if (status != ASTCENC_SUCCESS)
      {
          WARN() << "astcenc config init failed: " << astcenc_get_error_string(status);
          return;
      }
  
      constexpr unsigned int kThreadCount = 1;
  
      astcenc_context *ASTCContext;
      status = astcenc_context_alloc(&config, kThreadCount, &ASTCContext);
      if (status != ASTCENC_SUCCESS)
      {
          WARN() << "Could not allocate astcenc context: " << astcenc_get_error_string(status);
          return;
      }
  
      // Compute the number of ASTC blocks in each dimension
      uint32_t blockCountX = (static_cast<uint32_t>(width) + config.block_x - 1) / config.block_x;
      uint32_t blockCountY = (static_cast<uint32_t>(height) + config.block_y - 1) / config.block_y;
  
      // Space needed for 16 bytes of output per compressed block
      size_t blockSize = blockCountX * blockCountY * 16;
  
      astcenc_image image;
      image.dim_x     = static_cast<uint32_t>(width);
      image.dim_y     = static_cast<uint32_t>(height);
      image.dim_z     = 1;
      image.data_type = ASTCENC_TYPE_U8;
      image.data      = reinterpret_cast<void **>(&output);
  
      constexpr astcenc_swizzle swizzle{ASTCENC_SWZ_R, ASTCENC_SWZ_G, ASTCENC_SWZ_B, ASTCENC_SWZ_A};
  
      status = astcenc_decompress_image(ASTCContext, input, blockSize, &image, &swizzle, 0);
      if (status != ASTCENC_SUCCESS)
      {
          WARN() << "astcenc decompress failed: " << astcenc_get_error_string(status);
      }
  
      astcenc_context_free(ASTCContext);
  #else
      ERR() << "Trying to decode ASTC without having ASTC support built.";
  #endif
  }
  }  // namespace angle
  

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