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

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• Author : Jamie Madill
  Date : 2016-07-22 22:13:26
  Hash : a3944d4f
  Message : Add gl::Format to represent a texture/rb/surface format. This has a few advantages: it preserves all the information of the internal format, such as if it is sized or unsized. It also saves looking up the format multiple times in the table, which should improve speed in some cases. The extra sized-ness information will allow us to perform the correct validation in CopyTexSubImage calls. BUG=angleproject:1228 Change-Id: I42954771b0a9a968f5d787b8cf6e0af721791855 Reviewed-on: https://chromium-review.googlesource.com/362626 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>

• src/libANGLE/formatutils.h

• //
  // Copyright (c) 2013 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.
  //
  
  // formatutils.h: Queries for GL image formats.
  
  #ifndef LIBANGLE_FORMATUTILS_H_
  #define LIBANGLE_FORMATUTILS_H_
  
  #include <cstddef>
  #include <stdint.h>
  
  #include "angle_gl.h"
  #include "libANGLE/Caps.h"
  #include "libANGLE/Error.h"
  #include "libANGLE/angletypes.h"
  
  namespace gl
  {
  
  struct FormatType final
  {
      FormatType();
      FormatType(GLenum format_, GLenum type_);
      FormatType(const FormatType &other) = default;
      FormatType &operator=(const FormatType &other) = default;
  
      bool operator<(const FormatType &other) const;
  
      GLenum format;
      GLenum type;
  };
  
  struct Type
  {
      Type();
  
      GLuint bytes;
      GLuint bytesShift; // Bit shift by this value to effectively divide/multiply by "bytes" in a more optimal way
      bool specialInterpretation;
  };
  const Type &GetTypeInfo(GLenum type);
  
  struct InternalFormat
  {
      InternalFormat();
  
      gl::ErrorOrResult<GLuint> computeRowPitch(GLenum formatType,
                                                GLsizei width,
                                                GLint alignment,
                                                GLint rowLength) const;
      gl::ErrorOrResult<GLuint> computeDepthPitch(GLenum formatType,
                                                  GLsizei width,
                                                  GLsizei height,
                                                  GLint alignment,
                                                  GLint rowLength,
                                                  GLint imageHeight) const;
      gl::ErrorOrResult<GLuint> computeCompressedImageSize(GLenum formatType,
                                                           const gl::Extents &size) const;
      gl::ErrorOrResult<GLuint> computeSkipBytes(GLuint rowPitch,
                                                 GLuint depthPitch,
                                                 GLint skipImages,
                                                 GLint skipRows,
                                                 GLint skipPixels,
                                                 bool applySkipImages) const;
      gl::ErrorOrResult<GLuint> computeUnpackSize(GLenum formatType,
                                                  const gl::Extents &size,
                                                  const gl::PixelUnpackState &unpack) const;
  
      bool isLUMA() const;
  
      bool operator==(const InternalFormat &other) const;
      bool operator!=(const InternalFormat &other) const;
  
      GLenum internalFormat;
  
      GLuint redBits;
      GLuint greenBits;
      GLuint blueBits;
  
      GLuint luminanceBits;
  
      GLuint alphaBits;
      GLuint sharedBits;
  
      GLuint depthBits;
      GLuint stencilBits;
  
      GLuint pixelBytes;
  
      GLuint componentCount;
  
      bool compressed;
      GLuint compressedBlockWidth;
      GLuint compressedBlockHeight;
  
      GLenum format;
      GLenum type;
  
      GLenum componentType;
      GLenum colorEncoding;
  
      typedef bool (*SupportCheckFunction)(GLuint, const Extensions &);
      SupportCheckFunction textureSupport;
      SupportCheckFunction renderSupport;
      SupportCheckFunction filterSupport;
  };
  
  // A "Format" is either a sized format, or an {unsized format, type} combination.
  struct Format
  {
      // Sized types only.
      explicit Format(GLenum internalFormat);
      explicit Format(const InternalFormat &internalFormat);
  
      // Sized or unsized types.
      Format(GLenum internalFormat, GLenum format, GLenum type);
  
      Format(const Format &other);
      Format &operator=(const Format &other);
  
      GLenum asSized() const;
      bool valid() const;
  
      static Format Invalid();
      static bool SameSized(const Format &a, const Format &b);
  
      // This is the sized info.
      const InternalFormat *info;
      GLenum format;
      GLenum type;
      bool sized;
  };
  
  const InternalFormat &GetInternalFormatInfo(GLenum internalFormat);
  
  GLenum GetSizedInternalFormat(GLenum internalFormat, GLenum type);
  
  typedef std::set<GLenum> FormatSet;
  const FormatSet &GetAllSizedInternalFormats();
  
  // From the ESSL 3.00.4 spec:
  // Vertex shader inputs can only be float, floating-point vectors, matrices, signed and unsigned
  // integers and integer vectors. Vertex shader inputs cannot be arrays or structures.
  
  enum AttributeType
  {
      ATTRIBUTE_FLOAT,
      ATTRIBUTE_VEC2,
      ATTRIBUTE_VEC3,
      ATTRIBUTE_VEC4,
      ATTRIBUTE_INT,
      ATTRIBUTE_IVEC2,
      ATTRIBUTE_IVEC3,
      ATTRIBUTE_IVEC4,
      ATTRIBUTE_UINT,
      ATTRIBUTE_UVEC2,
      ATTRIBUTE_UVEC3,
      ATTRIBUTE_UVEC4,
      ATTRIBUTE_MAT2,
      ATTRIBUTE_MAT3,
      ATTRIBUTE_MAT4,
      ATTRIBUTE_MAT2x3,
      ATTRIBUTE_MAT2x4,
      ATTRIBUTE_MAT3x2,
      ATTRIBUTE_MAT3x4,
      ATTRIBUTE_MAT4x2,
      ATTRIBUTE_MAT4x3,
  };
  
  AttributeType GetAttributeType(GLenum enumValue);
  
  enum VertexFormatType
  {
      VERTEX_FORMAT_INVALID,
      VERTEX_FORMAT_SBYTE1,
      VERTEX_FORMAT_SBYTE1_NORM,
      VERTEX_FORMAT_SBYTE2,
      VERTEX_FORMAT_SBYTE2_NORM,
      VERTEX_FORMAT_SBYTE3,
      VERTEX_FORMAT_SBYTE3_NORM,
      VERTEX_FORMAT_SBYTE4,
      VERTEX_FORMAT_SBYTE4_NORM,
      VERTEX_FORMAT_UBYTE1,
      VERTEX_FORMAT_UBYTE1_NORM,
      VERTEX_FORMAT_UBYTE2,
      VERTEX_FORMAT_UBYTE2_NORM,
      VERTEX_FORMAT_UBYTE3,
      VERTEX_FORMAT_UBYTE3_NORM,
      VERTEX_FORMAT_UBYTE4,
      VERTEX_FORMAT_UBYTE4_NORM,
      VERTEX_FORMAT_SSHORT1,
      VERTEX_FORMAT_SSHORT1_NORM,
      VERTEX_FORMAT_SSHORT2,
      VERTEX_FORMAT_SSHORT2_NORM,
      VERTEX_FORMAT_SSHORT3,
      VERTEX_FORMAT_SSHORT3_NORM,
      VERTEX_FORMAT_SSHORT4,
      VERTEX_FORMAT_SSHORT4_NORM,
      VERTEX_FORMAT_USHORT1,
      VERTEX_FORMAT_USHORT1_NORM,
      VERTEX_FORMAT_USHORT2,
      VERTEX_FORMAT_USHORT2_NORM,
      VERTEX_FORMAT_USHORT3,
      VERTEX_FORMAT_USHORT3_NORM,
      VERTEX_FORMAT_USHORT4,
      VERTEX_FORMAT_USHORT4_NORM,
      VERTEX_FORMAT_SINT1,
      VERTEX_FORMAT_SINT1_NORM,
      VERTEX_FORMAT_SINT2,
      VERTEX_FORMAT_SINT2_NORM,
      VERTEX_FORMAT_SINT3,
      VERTEX_FORMAT_SINT3_NORM,
      VERTEX_FORMAT_SINT4,
      VERTEX_FORMAT_SINT4_NORM,
      VERTEX_FORMAT_UINT1,
      VERTEX_FORMAT_UINT1_NORM,
      VERTEX_FORMAT_UINT2,
      VERTEX_FORMAT_UINT2_NORM,
      VERTEX_FORMAT_UINT3,
      VERTEX_FORMAT_UINT3_NORM,
      VERTEX_FORMAT_UINT4,
      VERTEX_FORMAT_UINT4_NORM,
      VERTEX_FORMAT_SBYTE1_INT,
      VERTEX_FORMAT_SBYTE2_INT,
      VERTEX_FORMAT_SBYTE3_INT,
      VERTEX_FORMAT_SBYTE4_INT,
      VERTEX_FORMAT_UBYTE1_INT,
      VERTEX_FORMAT_UBYTE2_INT,
      VERTEX_FORMAT_UBYTE3_INT,
      VERTEX_FORMAT_UBYTE4_INT,
      VERTEX_FORMAT_SSHORT1_INT,
      VERTEX_FORMAT_SSHORT2_INT,
      VERTEX_FORMAT_SSHORT3_INT,
      VERTEX_FORMAT_SSHORT4_INT,
      VERTEX_FORMAT_USHORT1_INT,
      VERTEX_FORMAT_USHORT2_INT,
      VERTEX_FORMAT_USHORT3_INT,
      VERTEX_FORMAT_USHORT4_INT,
      VERTEX_FORMAT_SINT1_INT,
      VERTEX_FORMAT_SINT2_INT,
      VERTEX_FORMAT_SINT3_INT,
      VERTEX_FORMAT_SINT4_INT,
      VERTEX_FORMAT_UINT1_INT,
      VERTEX_FORMAT_UINT2_INT,
      VERTEX_FORMAT_UINT3_INT,
      VERTEX_FORMAT_UINT4_INT,
      VERTEX_FORMAT_FIXED1,
      VERTEX_FORMAT_FIXED2,
      VERTEX_FORMAT_FIXED3,
      VERTEX_FORMAT_FIXED4,
      VERTEX_FORMAT_HALF1,
      VERTEX_FORMAT_HALF2,
      VERTEX_FORMAT_HALF3,
      VERTEX_FORMAT_HALF4,
      VERTEX_FORMAT_FLOAT1,
      VERTEX_FORMAT_FLOAT2,
      VERTEX_FORMAT_FLOAT3,
      VERTEX_FORMAT_FLOAT4,
      VERTEX_FORMAT_SINT210,
      VERTEX_FORMAT_UINT210,
      VERTEX_FORMAT_SINT210_NORM,
      VERTEX_FORMAT_UINT210_NORM,
      VERTEX_FORMAT_SINT210_INT,
      VERTEX_FORMAT_UINT210_INT,
  };
  
  typedef std::vector<gl::VertexFormatType> InputLayout;
  
  struct VertexFormat : angle::NonCopyable
  {
      VertexFormat(GLenum typeIn, GLboolean normalizedIn, GLuint componentsIn, bool pureIntegerIn);
  
      GLenum type;
      GLboolean normalized;
      GLuint components;
      bool pureInteger;
  };
  
  VertexFormatType GetVertexFormatType(GLenum type, GLboolean normalized, GLuint components, bool pureInteger);
  VertexFormatType GetVertexFormatType(const VertexAttribute &attrib);
  VertexFormatType GetVertexFormatType(const VertexAttribute &attrib, GLenum currentValueType);
  const VertexFormat &GetVertexFormatFromType(VertexFormatType vertexFormatType);
  
  }  // namespace gl
  
  #endif // LIBANGLE_FORMATUTILS_H_