kc3-lang/angle/src/libGLESv2/Caps.h

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• Author : Geoff Lang
  Date : 2014-07-03 13:46:52
  Hash : 5f4c4636
  Message : Use the FormatCaps for multisample validation and queries. BUG=angle:658 Change-Id: Ic9fa53fb62d7eff62f07b68d7ddada461ecad859 Reviewed-on: https://chromium-review.googlesource.com/206832 Tested-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

• src/libGLESv2/Caps.h

• #ifndef LIBGLESV2_CAPS_H
  #define LIBGLESV2_CAPS_H
  
  //
  // Copyright (c) 2014 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.
  //
  
  #include "angle_gl.h"
  
  #include <set>
  #include <unordered_map>
  #include <vector>
  #include <string>
  
  namespace gl
  {
  
  typedef std::set<GLuint> SupportedSampleSet;
  
  struct TextureCaps
  {
      TextureCaps();
  
      // Supports for basic texturing: glTexImage, glTexSubImage, etc
      bool texturable;
  
      // Support for linear or anisotropic filtering
      bool filterable;
  
      // Support for being used as a framebuffer attachment or renderbuffer format
      bool renderable;
  
      SupportedSampleSet sampleCounts;
  
      // Get the maximum number of samples supported
      GLuint getMaxSamples() const;
  
      // Get the number of supported samples that is at least as many as requested.  Returns 0 if
      // there are no sample counts available
      GLuint getNearestSamples(GLuint requestedSamples) const;
  };
  
  class TextureCapsMap
  {
    public:
      typedef std::unordered_map<GLenum, TextureCaps>::const_iterator const_iterator;
  
      void insert(GLenum internalFormat, const TextureCaps &caps);
      void remove(GLenum internalFormat);
  
      const TextureCaps &get(GLenum internalFormat) const;
  
      const_iterator begin() const;
      const_iterator end() const;
  
      size_t size() const;
  
    private:
      typedef std::unordered_map<GLenum, TextureCaps> InternalFormatToCapsMap;
      InternalFormatToCapsMap mCapsMap;
  };
  
  struct Extensions
  {
      Extensions();
  
      // Generate a vector of supported extension strings
      std::vector<std::string> getStrings() const;
  
      // Set all texture related extension support based on the supported textures.
      // Determines support for:
      // GL_OES_rgb8_rgba8
      // GL_EXT_texture_format_BGRA8888
      // GL_OES_texture_half_float, GL_OES_texture_half_float_linear
      // GL_OES_texture_float, GL_OES_texture_float_linear
      // GL_EXT_texture_rg
      // GL_EXT_texture_compression_dxt1, GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5
      // GL_ANGLE_depth_texture
      // GL_EXT_color_buffer_float
      void setTextureExtensionSupport(const TextureCapsMap &textureCaps);
  
      // ES2 Extension support
  
      // GL_OES_element_index_uint
      bool elementIndexUint;
  
      // GL_OES_packed_depth_stencil
      bool packedDepthStencil;
  
      // GL_OES_get_program_binary
      bool getProgramBinary;
  
      // GL_OES_rgb8_rgba8
      // Implies that TextureCaps for GL_RGB8 and GL_RGBA8 exist
      bool rgb8rgba8;
  
      // GL_EXT_texture_format_BGRA8888
      // Implies that TextureCaps for GL_BGRA8 exist
      bool textureFormatBGRA8888;
  
      // GL_EXT_read_format_bgra
      bool readFormatBGRA;
  
      // GL_NV_pixel_buffer_object
      bool pixelBufferObject;
  
      // GL_OES_mapbuffer and GL_EXT_map_buffer_range
      bool mapBuffer;
      bool mapBufferRange;
  
      // GL_OES_texture_half_float and GL_OES_texture_half_float_linear
      // Implies that TextureCaps for GL_RGB16F, GL_RGBA16F, GL_ALPHA32F_EXT, GL_LUMINANCE32F_EXT and
      // GL_LUMINANCE_ALPHA32F_EXT exist
      bool textureHalfFloat;
      bool textureHalfFloatLinear;
  
      // GL_OES_texture_float and GL_OES_texture_float_linear
      // Implies that TextureCaps for GL_RGB32F, GL_RGBA32F, GL_ALPHA16F_EXT, GL_LUMINANCE16F_EXT and
      // GL_LUMINANCE_ALPHA16F_EXT exist
      bool textureFloat;
      bool textureFloatLinear;
  
      // GL_EXT_texture_rg
      // Implies that TextureCaps for GL_R8, GL_RG8 (and floating point R/RG texture formats if floating point extensions
      // are also present) exist
      bool textureRG;
  
      // GL_EXT_texture_compression_dxt1, GL_ANGLE_texture_compression_dxt3 and GL_ANGLE_texture_compression_dxt5
      // Implies that TextureCaps for GL_COMPRESSED_RGB_S3TC_DXT1_EXT, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
      // GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE and GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE
      bool textureCompressionDXT1;
      bool textureCompressionDXT3;
      bool textureCompressionDXT5;
  
      // GL_EXT_sRGB
      // Implies that TextureCaps for GL_SRGB8_ALPHA8 and GL_SRGB8 exist
      // TODO: Don't advertise this extension in ES3
      bool sRGB;
  
      // GL_ANGLE_depth_texture
      bool depthTextures;
  
      // GL_EXT_texture_storage
      bool textureStorage;
  
      // GL_OES_texture_npot
      bool textureNPOT;
  
      // GL_EXT_draw_buffers
      bool drawBuffers;
  
      // GL_EXT_texture_filter_anisotropic
      bool textureFilterAnisotropic;
      GLfloat maxTextureAnisotropy;
  
      // GL_EXT_occlusion_query_boolean
      bool occlusionQueryBoolean;
  
      // GL_NV_fence
      bool fence;
  
      // GL_ANGLE_timer_query
      bool timerQuery;
  
      // GL_EXT_robustness
      bool robustness;
  
      // GL_EXT_blend_minmax
      bool blendMinMax;
  
      // GL_ANGLE_framebuffer_blit
      bool framebufferBlit;
  
      // GL_ANGLE_framebuffer_multisample
      bool framebufferMultisample;
      GLuint maxSamples;
  
      // GL_ANGLE_instanced_arrays
      bool instancedArrays;
  
      // GL_ANGLE_pack_reverse_row_order
      bool packReverseRowOrder;
  
      // GL_OES_standard_derivatives
      bool standardDerivatives;
  
      // GL_EXT_shader_texture_lod
      bool shaderTextureLOD;
  
      // GL_EXT_frag_depth
      bool fragDepth;
  
      // GL_ANGLE_texture_usage
      bool textureUsage;
  
      // GL_ANGLE_translated_shader_source
      bool translatedShaderSource;
  
      // ES3 Extension support
  
      // GL_EXT_color_buffer_float
      bool colorBufferFloat;
  };
  
  struct Caps
  {
      Caps();
  
      // Table 6.28, implementation dependent values
      GLuint64 maxElementIndex;
      GLuint max3DTextureSize;
      GLuint max2DTextureSize;
      GLuint maxArrayTextureLayers;
      GLfloat maxLODBias;
      GLuint maxCubeMapTextureSize;
      GLuint maxRenderbufferSize;
      GLuint maxDrawBuffers;
      GLuint maxColorAttachments;
      GLuint maxViewportWidth;
      GLuint maxViewportHeight;
      GLfloat minAliasedPointSize;
      GLfloat maxAliasedPointSize;
      GLfloat minAliasedLineWidth;
      GLfloat maxAliasedLineWidth;
  
  };
  
  }
  
  #endif // LIBGLESV2_CAPS_H