kc3-lang/angle/include/platform/FeaturesVk.h

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• Hash : 4f3b207d
  Author :
  Date : 2019-01-01T14:48:25
  

  Vulkan: Shader path for texture-to-texture copy
  
  This change implements glCopy[Sub]TextureCHROMIUM in GPU.  As with the
  previous change implementing glCopyTex[Sub]Image2D, it currently only
  selects the shader path if the texture is already defined.
  
  Bug: angleproject:2958
  Change-Id: Ia1b5625f92e6c9f91807c9b601e5c34d2d5e5c30
  Reviewed-on: https://chromium-review.googlesource.com/c/1392394
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
  

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• include/platform/FeaturesVk.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.
  //
  // FeaturesVk.h: Optional features for the Vulkan renderer.
  //
  
  #ifndef ANGLE_PLATFORM_FEATURESVK_H_
  #define ANGLE_PLATFORM_FEATURESVK_H_
  
  namespace angle
  {
  
  struct FeaturesVk
  {
      // Line segment rasterization must follow OpenGL rules. This means using an algorithm similar
      // to Bresenham's. Vulkan uses a different algorithm. This feature enables the use of pixel
      // shader patching to implement OpenGL basic line rasterization rules. This feature will
      // normally always be enabled. Exposing it as an option enables performance testing.
      bool basicGLLineRasterization = false;
  
      // Flips the viewport to render upside-down. This has the effect to render the same way as
      // OpenGL. If this feature gets enabled, we enable the KHR_MAINTENANCE_1 extension to allow
      // negative viewports. We inverse rendering to the backbuffer by reversing the height of the
      // viewport and increasing Y by the height. So if the viewport was (0,0,width,height), it
      // becomes (0, height, width, -height). Unfortunately, when we start doing this, we also need
      // to adjust a lot of places since the rendering now happens upside-down. Affected places so
      // far:
      // -readPixels
      // -copyTexImage
      // -framebuffer blit
      // -generating mipmaps
      // -Point sprites tests
      // -texStorage
      bool flipViewportY = false;
  
      // Add an extra copy region when using vkCmdCopyBuffer as the Windows Intel driver seems
      // to have a bug where the last region is ignored.
      bool extraCopyBufferRegion = false;
  
      // This flag is added for the sole purpose of end2end tests, to test the correctness
      // of various algorithms when a fallback format is used, such as using a packed format to
      // emulate a depth- or stencil-only format.
      bool forceFallbackFormat = false;
  
      // On some NVIDIA drivers the point size range reported from the API is inconsistent with the
      // actual behavior. Clamp the point size to the value from the API to fix this.
      // Tracked in http://anglebug.com/2970.
      bool clampPointSize = false;
  
      // On some android devices, the memory barrier between the compute shader that converts vertex
      // attributes and the vertex shader that reads from it is ineffective.  Only known workaround is
      // to perform a flush after the conversion.  http://anglebug.com/3016
      bool flushAfterVertexConversion = false;
  
      // Whether the VkDevice supports the VK_KHR_incremental_present extension, on which the
      // EGL_KHR_swap_buffers_with_damage extension can be layered.
      bool supportsIncrementalPresent = false;
  
      // Whether texture copies on cube map targets should be done on GPU.  This is a workaround for
      // Intel drivers on windows that have an issue with creating single-layer views on cube map
      // textures.
      bool forceCpuPathForCubeMapCopy = false;
  };
  
  }  // namespace angle
  
  #endif  // ANGLE_PLATFORM_FEATURESVK_H_
  

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