1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 // utilities.h: Conversion functions and other utility routines. 16 17 #ifndef LIBGLESV2_UTILITIES_H 18 #define LIBGLESV2_UTILITIES_H 19 20 #include "Device.hpp" 21 #include "common/Image.hpp" 22 #include "Texture.h" 23 24 #include <GLES2/gl2.h> 25 #include <GLES2/gl2ext.h> 26 #include <GL/glcorearb.h> 27 #include <GL/glext.h> 28 29 #include <string> 30 31 namespace es2 32 { 33 struct Color; 34 class Framebuffer; 35 36 unsigned int UniformComponentCount(GLenum type); 37 GLenum UniformComponentType(GLenum type); 38 size_t UniformTypeSize(GLenum type); 39 bool IsSamplerUniform(GLenum type); 40 int VariableRowCount(GLenum type); 41 int VariableColumnCount(GLenum type); 42 int VariableRegisterCount(GLenum type); 43 int VariableRegisterSize(GLenum type); 44 45 int AllocateFirstFreeBits(unsigned int *bits, unsigned int allocationSize, unsigned int bitsSize); 46 47 bool IsCompressed(GLint intenalformat); 48 bool IsSizedInternalFormat(GLint internalformat); // Not compressed. 49 GLenum ValidateSubImageParams(bool compressed, bool copy, GLenum target, GLint level, GLint xoffset, GLint yoffset, 50 GLsizei width, GLsizei height, GLenum format, GLenum type, Texture *texture); 51 GLenum ValidateSubImageParams(bool compressed, bool copy, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, 52 GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, Texture *texture); 53 bool ValidateCopyFormats(GLenum textureFormat, GLenum colorbufferFormat); 54 bool ValidateReadPixelsFormatType(const Framebuffer *framebuffer, GLenum format, GLenum type); 55 bool IsDepthTexture(GLint format); 56 bool IsStencilTexture(GLint format); 57 bool IsCubemapTextureTarget(GLenum target); 58 int CubeFaceIndex(GLenum cubeTarget); 59 bool IsTexImageTarget(GLenum target); 60 bool IsTextureTarget(GLenum target); 61 GLenum ValidateTextureFormatType(GLenum format, GLenum type, GLint internalformat, GLenum target); 62 size_t GetTypeSize(GLenum type); 63 sw::Format ConvertReadFormatType(GLenum format, GLenum type); 64 65 bool IsColorRenderable(GLint internalformat); 66 bool IsDepthRenderable(GLint internalformat); 67 bool IsStencilRenderable(GLint internalformat); 68 bool IsMipmappable(GLint internalformat); 69 70 GLuint GetAlphaSize(GLint internalformat); 71 GLuint GetRedSize(GLint internalformat); 72 GLuint GetGreenSize(GLint internalformat); 73 GLuint GetBlueSize(GLint internalformat); 74 GLuint GetDepthSize(GLint internalformat); 75 GLuint GetStencilSize(GLint internalformat); 76 77 GLenum GetColorComponentType(GLint internalformat); 78 GLenum GetComponentType(GLint internalformat, GLenum attachment); 79 bool IsNormalizedInteger(GLint internalformat); 80 bool IsNonNormalizedInteger(GLint internalformat); 81 bool IsFloatFormat(GLint internalformat); 82 bool IsSignedNonNormalizedInteger(GLint internalformat); 83 bool IsUnsignedNonNormalizedInteger(GLint internalformat); 84 GLenum GetColorEncoding(GLint internalformat); 85 86 // Parse the base uniform name and array index. Returns the base name of the uniform. outSubscript is 87 // set to GL_INVALID_INDEX if the provided name is not an array or the array index is invalid. 88 std::string ParseUniformName(const std::string &name, unsigned int *outSubscript); 89 90 bool FloatFitsInInt(float f); 91 } 92 93 namespace es2sw 94 { 95 sw::DepthCompareMode ConvertDepthComparison(GLenum comparison); 96 sw::StencilCompareMode ConvertStencilComparison(GLenum comparison); 97 sw::Color<float> ConvertColor(es2::Color color); 98 sw::BlendFactor ConvertBlendFunc(GLenum blend); 99 sw::BlendOperation ConvertBlendOp(GLenum blendOp); 100 sw::LogicalOperation ConvertLogicalOperation(GLenum logicalOperation); 101 sw::StencilOperation ConvertStencilOp(GLenum stencilOp); 102 sw::AddressingMode ConvertTextureWrap(GLenum wrap); 103 sw::CompareFunc ConvertCompareFunc(GLenum compareFunc, GLenum compareMode); 104 sw::SwizzleType ConvertSwizzleType(GLenum swizzleType); 105 sw::CullMode ConvertCullMode(GLenum cullFace, GLenum frontFace); 106 unsigned int ConvertColorMask(bool red, bool green, bool blue, bool alpha); 107 sw::MipmapType ConvertMipMapFilter(GLenum minFilter); 108 sw::FilterType ConvertTextureFilter(GLenum minFilter, GLenum magFilter, float maxAnisotropy); 109 bool ConvertPrimitiveType(GLenum primitiveType, GLsizei elementCount, GLenum elementType, sw::DrawType &swPrimitiveType, int &primitiveCount, int &verticesPerPrimitive); 110 } 111 112 namespace sw2es 113 { 114 GLenum ConvertBackBufferFormat(sw::Format format); 115 GLenum ConvertDepthStencilFormat(sw::Format format); 116 } 117 118 #endif // LIBGLESV2_UTILITIES_H 119