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
27#include <string>
28
29namespace es2
30{
31	struct Color;
32
33	unsigned int UniformComponentCount(GLenum type);
34	GLenum UniformComponentType(GLenum type);
35	size_t UniformTypeSize(GLenum type);
36	bool IsSamplerUniform(GLenum type);
37	int VariableRowCount(GLenum type);
38	int VariableColumnCount(GLenum type);
39	int VariableRegisterCount(GLenum type);
40	int VariableRegisterSize(GLenum type);
41
42	int AllocateFirstFreeBits(unsigned int *bits, unsigned int allocationSize, unsigned int bitsSize);
43
44	bool IsCompressed(GLenum format, GLint clientVersion);
45	GLenum GetSizedInternalFormat(GLenum internalFormat, GLenum type);
46	GLenum ValidateCompressedFormat(GLenum format, GLint clientVersion, bool expectCompressedFormats);
47	GLenum ValidateSubImageParams(bool compressed, GLsizei width, GLsizei height, GLint xoffset, GLint yoffset, GLenum target, GLint level, GLenum sizedInternalFormat, Texture *texture);
48	GLenum ValidateSubImageParams(bool compressed, GLsizei width, GLsizei height, GLsizei depth, GLint xoffset, GLint yoffset, GLint zoffset, GLenum target, GLint level, GLenum sizedInternalFormat, Texture *texture);
49	bool ValidReadPixelsFormatType(GLenum internalFormat, GLenum internalType, GLenum format, GLenum type, GLint clientVersion);
50	bool IsDepthTexture(GLenum format);
51	bool IsStencilTexture(GLenum format);
52	bool IsCubemapTextureTarget(GLenum target);
53	int CubeFaceIndex(GLenum cubeTarget);
54	bool IsTextureTarget(GLenum target);
55	bool ValidateTextureFormatType(GLenum format, GLenum type, GLint internalformat, GLint clientVersion);
56
57	bool IsColorRenderable(GLenum internalformat, GLint clientVersion);
58	bool IsDepthRenderable(GLenum internalformat);
59	bool IsStencilRenderable(GLenum internalformat);
60
61	// Parse the base uniform name and array index.  Returns the base name of the uniform. outSubscript is
62	// set to GL_INVALID_INDEX if the provided name is not an array or the array index is invalid.
63	std::string ParseUniformName(const std::string &name, size_t *outSubscript);
64}
65
66namespace es2sw
67{
68	sw::DepthCompareMode ConvertDepthComparison(GLenum comparison);
69	sw::StencilCompareMode ConvertStencilComparison(GLenum comparison);
70	sw::Color<float> ConvertColor(es2::Color color);
71	sw::BlendFactor ConvertBlendFunc(GLenum blend);
72	sw::BlendOperation ConvertBlendOp(GLenum blendOp);
73	sw::LogicalOperation ConvertLogicalOperation(GLenum logicalOperation);
74	sw::StencilOperation ConvertStencilOp(GLenum stencilOp);
75	sw::AddressingMode ConvertTextureWrap(GLenum wrap);
76	sw::SwizzleType ConvertSwizzleType(GLenum swizzleType);
77	sw::CullMode ConvertCullMode(GLenum cullFace, GLenum frontFace);
78	unsigned int ConvertColorMask(bool red, bool green, bool blue, bool alpha);
79	sw::MipmapType ConvertMipMapFilter(GLenum minFilter);
80	sw::FilterType ConvertTextureFilter(GLenum minFilter, GLenum magFilter, float maxAnisotropy);
81	bool ConvertPrimitiveType(GLenum primitiveType, GLsizei elementCount,  GLenum elementType, sw::DrawType &swPrimitiveType, int &primitiveCount, int &verticesPerPrimitive);
82	sw::Format ConvertRenderbufferFormat(GLenum format);
83}
84
85namespace sw2es
86{
87	GLuint GetAlphaSize(sw::Format colorFormat);
88	GLuint GetRedSize(sw::Format colorFormat);
89	GLuint GetGreenSize(sw::Format colorFormat);
90	GLuint GetBlueSize(sw::Format colorFormat);
91	GLuint GetDepthSize(sw::Format depthFormat);
92	GLuint GetStencilSize(sw::Format stencilFormat);
93	GLenum GetComponentType(sw::Format format, GLenum attachment);
94
95	GLenum ConvertBackBufferFormat(sw::Format format);
96	GLenum ConvertDepthStencilFormat(sw::Format format);
97}
98
99#endif  // LIBGLESV2_UTILITIES_H
100