kc3-lang/angle/src/libANGLE/entry_points_utils.h

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• Hash : 9f693aa3
  Author :
  Date : 2022-10-22T14:45:59
  

  Implement an allow list for PLS
  
  In order to guarantee no data is lost while using the
  EXT_shader_pixel_local_storage extension, we need to restrict
  applications to a small subset of commands while pixel local storage is
  active. This CL implements the allow list for GL entrypoints using
  wildcard matching inside the code generator, and adds custom validation
  for the more specific restrictions that go into effect when PLS is
  active.
  
  Bug: angleproject:7279
  Change-Id: I5dd48bd93c10e8775f32be32a4fcf17855eb2f0e
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3932552
  Reviewed-by: Kenneth Russell <kbr@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Commit-Queue: Chris Dalton <chris@rive.app>
  

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• src/libANGLE/entry_points_utils.h

• //
  // Copyright 2018 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.
  //
  // entry_point_utils:
  //   These helpers are used in GL/GLES entry point routines.
  
  #ifndef LIBANGLE_ENTRY_POINT_UTILS_H_
  #define LIBANGLE_ENTRY_POINT_UTILS_H_
  
  #include "angle_gl.h"
  #include "common/Optional.h"
  #include "common/PackedEnums.h"
  #include "common/angleutils.h"
  #include "common/entry_points_enum_autogen.h"
  #include "common/mathutil.h"
  #include "libANGLE/Context.h"
  #include "libANGLE/Display.h"
  
  namespace gl
  {
  // A template struct for determining the default value to return for each entry point.
  template <angle::EntryPoint EP, typename ReturnType>
  struct DefaultReturnValue;
  
  // Default return values for each basic return type.
  template <angle::EntryPoint EP>
  struct DefaultReturnValue<EP, GLint>
  {
      static constexpr GLint kValue = -1;
  };
  
  // This doubles as the GLenum return value.
  template <angle::EntryPoint EP>
  struct DefaultReturnValue<EP, GLuint>
  {
      static constexpr GLuint kValue = 0;
  };
  
  template <angle::EntryPoint EP>
  struct DefaultReturnValue<EP, GLboolean>
  {
      static constexpr GLboolean kValue = GL_FALSE;
  };
  
  template <angle::EntryPoint EP>
  struct DefaultReturnValue<EP, ShaderProgramID>
  {
      static constexpr ShaderProgramID kValue = {0};
  };
  
  // Catch-all rules for pointer types.
  template <angle::EntryPoint EP, typename PointerType>
  struct DefaultReturnValue<EP, const PointerType *>
  {
      static constexpr const PointerType *kValue = nullptr;
  };
  
  template <angle::EntryPoint EP, typename PointerType>
  struct DefaultReturnValue<EP, PointerType *>
  {
      static constexpr PointerType *kValue = nullptr;
  };
  
  // Overloaded to return invalid index
  template <>
  struct DefaultReturnValue<angle::EntryPoint::GLGetUniformBlockIndex, GLuint>
  {
      static constexpr GLuint kValue = GL_INVALID_INDEX;
  };
  
  // Specialized enum error value.
  template <>
  struct DefaultReturnValue<angle::EntryPoint::GLClientWaitSync, GLenum>
  {
      static constexpr GLenum kValue = GL_WAIT_FAILED;
  };
  
  // glTestFenceNV should still return TRUE for an invalid fence.
  template <>
  struct DefaultReturnValue<angle::EntryPoint::GLTestFenceNV, GLboolean>
  {
      static constexpr GLboolean kValue = GL_TRUE;
  };
  
  template <angle::EntryPoint EP, typename ReturnType>
  constexpr ANGLE_INLINE ReturnType GetDefaultReturnValue()
  {
      return DefaultReturnValue<EP, ReturnType>::kValue;
  }
  
  #if ANGLE_CAPTURE_ENABLED
  #    define ANGLE_CAPTURE_GL(Func, ...) CaptureGLCallToFrameCapture(Capture##Func, __VA_ARGS__)
  #else
  #    define ANGLE_CAPTURE_GL(...)
  #endif  // ANGLE_CAPTURE_ENABLED
  
  #define EGL_EVENT(EP, FMT, ...) EVENT(nullptr, EGL##EP, FMT, ##__VA_ARGS__)
  
  inline int CID(const Context *context)
  {
      return context == nullptr ? 0 : static_cast<int>(context->id().value);
  }
  
  bool GeneratePixelLocalStorageActiveError(const Context *context, angle::EntryPoint entryPoint);
  
  ANGLE_INLINE bool ValidatePixelLocalStorageInactive(const Context *context,
                                                      angle::EntryPoint entryPoint)
  {
      return context->getState().getPixelLocalStorageActivePlanes() == 0 ||
             GeneratePixelLocalStorageActiveError(context, entryPoint);
  }
  }  // namespace gl
  
  namespace egl
  {
  inline int CID(EGLDisplay display, EGLContext context)
  {
      const egl::Display *displayPtr = reinterpret_cast<const egl::Display *>(display);
      if (!Display::isValidDisplay(displayPtr))
      {
          return -1;
      }
      gl::ContextID contextID = {static_cast<GLuint>(reinterpret_cast<uintptr_t>(context))};
      if (!displayPtr->isValidContext(contextID))
      {
          return -1;
      }
      return contextID.value;
  }
  
  #if ANGLE_CAPTURE_ENABLED
  #    define ANGLE_CAPTURE_EGL(Func, ...) CaptureEGLCallToFrameCapture(Capture##Func, __VA_ARGS__)
  #else
  #    define ANGLE_CAPTURE_EGL(...)
  #endif  // ANGLE_CAPTURE_ENABLED
  }  // namespace egl
  
  #endif  // LIBANGLE_ENTRY_POINT_UTILS_H_
  

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