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1 //
2 // Copyright 2019 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
5 //
6 // gl_enum_utils.cpp:
7 //   Utility functions for converting GLenums to string.
8 
9 #include "libANGLE/capture/gl_enum_utils.h"
10 
11 #include "common/bitset_utils.h"
12 
13 #include <iomanip>
14 #include <sstream>
15 
16 namespace gl
17 {
18 const char kUnknownGLenumString[] = "EnumUnknown";
19 
OutputGLenumString(std::ostream & out,GLenumGroup enumGroup,unsigned int value)20 void OutputGLenumString(std::ostream &out, GLenumGroup enumGroup, unsigned int value)
21 {
22     const char *enumStr = GLenumToString(enumGroup, value);
23     if (enumStr != kUnknownGLenumString)
24     {
25         out << enumStr;
26         return;
27     }
28 
29     if (enumGroup == GLenumGroup::Boolean)
30     {
31         // If an unknown enum was submitted as GLboolean, just write out the value.
32         if (enumStr == kUnknownGLenumString)
33         {
34             out << value;
35         }
36         else
37         {
38             out << enumStr;
39         }
40 
41         return;
42     }
43 
44     if (enumGroup != GLenumGroup::DefaultGroup)
45     {
46         // Retry with the "Default" group
47         enumStr = GLenumToString(GLenumGroup::DefaultGroup, value);
48         if (enumStr != kUnknownGLenumString)
49         {
50             out << enumStr;
51             return;
52         }
53     }
54 
55     out << std::hex << "0x" << std::setfill('0') << std::setw(4) << value << std::dec;
56 }
57 
OutputGLbitfieldString(std::ostream & out,GLenumGroup enumGroup,unsigned int value)58 void OutputGLbitfieldString(std::ostream &out, GLenumGroup enumGroup, unsigned int value)
59 {
60     out << GLbitfieldToString(enumGroup, value);
61 }
62 
GLbooleanToString(unsigned int value)63 const char *GLbooleanToString(unsigned int value)
64 {
65     return GLenumToString(GLenumGroup::Boolean, value);
66 }
67 
GLbitfieldToString(GLenumGroup enumGroup,unsigned int value)68 std::string GLbitfieldToString(GLenumGroup enumGroup, unsigned int value)
69 {
70     std::stringstream st;
71 
72     if (value == 0)
73     {
74         return "0";
75     }
76 
77     const angle::BitSet<32> bitSet(value);
78     bool first = true;
79     for (const auto index : bitSet)
80     {
81         if (!first)
82         {
83             st << " | ";
84         }
85         first = false;
86 
87         unsigned int mask = 1u << index;
88         OutputGLenumString(st, enumGroup, mask);
89     }
90 
91     return st.str();
92 }
93 }  // namespace gl
94