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 LIBGLES_CM_UTILITIES_H
18#define LIBGLES_CM_UTILITIES_H
19
20#include "Device.hpp"
21#include "common/Image.hpp"
22#include "Texture.h"
23
24#include <GLES/gl.h>
25#include <GLES/glext.h>
26
27#include <string>
28
29namespace es1
30{
31	struct Color;
32
33	bool IsCompressed(GLenum format);
34	GLenum ValidateSubImageParams(bool compressed, bool copy, GLenum target, GLint level, GLint xoffset, GLint yoffset,
35	                              GLsizei width, GLsizei height, GLenum format, GLenum type, Texture *texture);
36	bool IsDepthTexture(GLenum format);
37	bool IsStencilTexture(GLenum format);
38	bool IsCubemapTextureTarget(GLenum target);
39	int CubeFaceIndex(GLenum cubeTarget);
40	bool IsTextureTarget(GLenum target);
41	GLenum ValidateTextureFormatType(GLenum format, GLenum type, GLint internalformat, GLenum target);
42
43	bool IsColorRenderable(GLint internalformat);
44	bool IsDepthRenderable(GLint internalformat);
45	bool IsStencilRenderable(GLint internalformat);
46
47	GLuint GetAlphaSize(GLint internalformat);
48	GLuint GetRedSize(GLint internalformat);
49	GLuint GetGreenSize(GLint internalformat);
50	GLuint GetBlueSize(GLint internalformat);
51	GLuint GetDepthSize(GLint internalformat);
52	GLuint GetStencilSize(GLint internalformat);
53
54	bool IsAlpha(GLint texFormat);
55	bool IsRGB(GLint texFormat);
56	bool IsRGBA(GLint texFormat);
57}
58
59namespace es2sw
60{
61	sw::DepthCompareMode ConvertDepthComparison(GLenum comparison);
62	sw::StencilCompareMode ConvertStencilComparison(GLenum comparison);
63	sw::AlphaCompareMode ConvertAlphaComparison(GLenum comparison);
64	sw::Color<float> ConvertColor(es1::Color color);
65	sw::BlendFactor ConvertBlendFunc(GLenum blend);
66	sw::BlendOperation ConvertBlendOp(GLenum blendOp);
67	sw::LogicalOperation ConvertLogicalOperation(GLenum logicalOperation);
68	sw::StencilOperation ConvertStencilOp(GLenum stencilOp);
69	sw::AddressingMode ConvertTextureWrap(GLenum wrap);
70	sw::CullMode ConvertCullMode(GLenum cullFace, GLenum frontFace);
71	unsigned int ConvertColorMask(bool red, bool green, bool blue, bool alpha);
72	sw::MipmapType ConvertMipMapFilter(GLenum minFilter);
73	sw::FilterType ConvertTextureFilter(GLenum minFilter, GLenum magFilter, float maxAnisotropy);
74	bool ConvertPrimitiveType(GLenum primitiveType, GLsizei elementCount,  GLenum elementType, sw::DrawType &swPrimitiveType, int &primitiveCount);
75	sw::TextureStage::StageOperation ConvertCombineOperation(GLenum operation);
76	sw::TextureStage::SourceArgument ConvertSourceArgument(GLenum argument);
77	sw::TextureStage::ArgumentModifier ConvertSourceOperand(GLenum operand);
78}
79
80namespace sw2es
81{
82	GLenum ConvertBackBufferFormat(sw::Format format);
83	GLenum ConvertDepthStencilFormat(sw::Format format);
84}
85
86#endif  // LIBGLES_CM_UTILITIES_H
87