kc3-lang/angle/src/libANGLE/renderer/vulkan/ShaderVk.cpp

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• Hash : 15ead5d5
  Author :
  Date : 2020-11-02T12:25:32
  

  Reland "Vulkan: Let shader use rotation specialized constant"
  
  This is a reland of 47b3db22be33213eea4ad58f2453ee1088324ceb
  
  Original change's description:
  > Vulkan: Let shader use rotation specialized constant
  >
  > If use rotation specialized constant is enabled via compiler options,
  > this CL will use rotation specialized constant to generate flipXY,
  > rotation matrix and negFlipXY. This allows the driver to optimize for
  > the minimum instructions for rotation.
  >
  > Bug: b/171750979
  > Change-Id: I9851ac999d4d35b9f230f796e5445bca0dcb1e77
  > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2514773
  > Commit-Queue: Charlie Lao <cclao@google.com>
  > Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  > Reviewed-by: Ian Elliott <ianelliott@google.com>
  > Reviewed-by: Jamie Madill <jmadill@chromium.org>
  > Reviewed-by: Tim Van Patten <timvp@google.com>
  
  Bug: b/171750979
  Change-Id: I9efde40eb138bacb161cce483a30ec01fee0983b
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2533933
  Commit-Queue: Charlie Lao <cclao@google.com>
  Reviewed-by: Tim Van Patten <timvp@google.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/libANGLE/renderer/vulkan/ShaderVk.cpp

• //
  // Copyright 2016 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.
  //
  // ShaderVk.cpp:
  //    Implements the class methods for ShaderVk.
  //
  
  #include "libANGLE/renderer/vulkan/ShaderVk.h"
  
  #include "common/debug.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/renderer/vulkan/ContextVk.h"
  #include "platform/FeaturesVk.h"
  
  namespace rx
  {
  
  ShaderVk::ShaderVk(const gl::ShaderState &state) : ShaderImpl(state) {}
  
  ShaderVk::~ShaderVk() {}
  
  std::shared_ptr<WaitableCompileEvent> ShaderVk::compile(const gl::Context *context,
                                                          gl::ShCompilerInstance *compilerInstance,
                                                          ShCompileOptions options)
  {
      ShCompileOptions compileOptions = 0;
  
      ContextVk *contextVk = vk::GetImpl(context);
  
      bool isWebGL = context->getExtensions().webglCompatibility;
  
      if (isWebGL)
      {
          // Only webgl requires initialization of local variables, others don't.
          // Extra initialization in spirv shader may affect performance.
          compileOptions |= SH_INITIALIZE_UNINITIALIZED_LOCALS;
  
          if (mState.getShaderType() != gl::ShaderType::Compute)
          {
              compileOptions |= SH_INIT_OUTPUT_VARIABLES;
          }
      }
  
      if (contextVk->getFeatures().clampPointSize.enabled)
      {
          compileOptions |= SH_CLAMP_POINT_SIZE;
      }
  
      if (contextVk->getFeatures().basicGLLineRasterization.enabled)
      {
          compileOptions |= SH_ADD_BRESENHAM_LINE_RASTER_EMULATION;
      }
  
      if (contextVk->emulateSeamfulCubeMapSampling())
      {
          compileOptions |= SH_EMULATE_SEAMFUL_CUBE_MAP_SAMPLING;
      }
  
      if (contextVk->useOldRewriteStructSamplers())
      {
          compileOptions |= SH_USE_OLD_REWRITE_STRUCT_SAMPLERS;
      }
  
      if (!contextVk->getFeatures().enablePrecisionQualifiers.enabled)
      {
          compileOptions |= SH_IGNORE_PRECISION_QUALIFIERS;
      }
  
      // Let compiler detect and emit early fragment test execution mode. We will remove it if
      // context state does not allow it
      compileOptions |= SH_EARLY_FRAGMENT_TESTS_OPTIMIZATION;
  
      // Let compiler use specialized constant for pre-rotation.
      compileOptions |= SH_USE_ROTATION_SPECIALIZATION_CONSTANT;
  
      if (contextVk->getFeatures().enablePreRotateSurfaces.enabled ||
          contextVk->getFeatures().emulatedPrerotation90.enabled ||
          contextVk->getFeatures().emulatedPrerotation180.enabled ||
          contextVk->getFeatures().emulatedPrerotation270.enabled)
      {
          // Let compiler insert pre-rotation code.
          compileOptions |= SH_ADD_PRE_ROTATION;
      }
  
      return compileImpl(context, compilerInstance, mState.getSource(), compileOptions | options);
  }
  
  std::string ShaderVk::getDebugInfo() const
  {
      return mState.getTranslatedSource();
  }
  
  }  // namespace rx
  

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