Jarkko Poyry | 3c82736 | 2014-09-02 11:48:52 +0300 | [diff] [blame] | 1 | /*------------------------------------------------------------------------- |
| 2 | * drawElements Quality Program OpenGL ES Utilities |
| 3 | * ------------------------------------------------ |
| 4 | * |
| 5 | * Copyright 2014 The Android Open Source Project |
| 6 | * |
| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | * you may not use this file except in compliance with the License. |
| 9 | * You may obtain a copy of the License at |
| 10 | * |
| 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | * |
| 13 | * Unless required by applicable law or agreed to in writing, software |
| 14 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | * See the License for the specific language governing permissions and |
| 17 | * limitations under the License. |
| 18 | * |
| 19 | *//*! |
| 20 | * \file |
| 21 | * \brief Context Info Class. |
| 22 | *//*--------------------------------------------------------------------*/ |
| 23 | |
| 24 | #include "gluContextInfo.hpp" |
| 25 | #include "gluRenderContext.hpp" |
| 26 | #include "gluShaderProgram.hpp" |
| 27 | #include "glwFunctions.hpp" |
| 28 | #include "glwEnums.hpp" |
| 29 | |
| 30 | #include <iterator> |
| 31 | #include <algorithm> |
| 32 | |
| 33 | using std::vector; |
| 34 | using std::string; |
| 35 | using std::set; |
| 36 | |
| 37 | namespace glu |
| 38 | { |
| 39 | |
| 40 | class TryCompileProgram |
| 41 | { |
| 42 | public: |
| 43 | // \note Assumes that shader pointer can be stored as is (eg. it is static data) |
| 44 | TryCompileProgram (const char* vertexSource, const char* fragmentSource) |
| 45 | : m_vertexSource (vertexSource) |
| 46 | , m_fragmentSource (fragmentSource) |
| 47 | { |
| 48 | } |
| 49 | |
| 50 | bool operator() (const RenderContext& context) const |
| 51 | { |
| 52 | ShaderProgram program(context, |
| 53 | ProgramSources() << VertexSource(m_vertexSource) |
| 54 | << FragmentSource(m_fragmentSource)); |
| 55 | return program.isOk(); |
| 56 | } |
| 57 | |
| 58 | private: |
| 59 | const char* m_vertexSource; |
| 60 | const char* m_fragmentSource; |
| 61 | }; |
| 62 | |
| 63 | typedef CachedValue<bool, TryCompileProgram> IsProgramSupported; |
| 64 | |
Graeme Leese | 7d1658b | 2019-10-07 17:55:57 +0100 | [diff] [blame] | 65 | bool IsES3Compatible(const glw::Functions& gl) |
| 66 | { |
| 67 | // Detect compatible GLES context by querying GL_MAJOR_VERSION. |
| 68 | // This query does not exist on GLES2 so succeeding query implies GLES3+ context. |
| 69 | glw::GLint majorVersion = 0; |
| 70 | gl.getError(); |
| 71 | gl.getIntegerv(GL_MAJOR_VERSION, &majorVersion); |
| 72 | |
| 73 | return (gl.getError() == GL_NO_ERROR); |
| 74 | } |
| 75 | |
Jarkko Poyry | 3c82736 | 2014-09-02 11:48:52 +0300 | [diff] [blame] | 76 | // ES2-specific context info |
| 77 | class ES2ContextInfo : public ContextInfo |
| 78 | { |
| 79 | public: |
| 80 | ES2ContextInfo (const RenderContext& context); |
| 81 | ~ES2ContextInfo (void) {} |
| 82 | |
| 83 | bool isVertexUniformLoopSupported (void) const { return m_vertexUniformLoopsSupported.getValue(m_context); } |
| 84 | bool isVertexDynamicLoopSupported (void) const { return m_vertexDynamicLoopsSupported.getValue(m_context); } |
| 85 | bool isFragmentHighPrecisionSupported (void) const { return m_fragmentHighPrecisionSupported.getValue(m_context); } |
| 86 | bool isFragmentUniformLoopSupported (void) const { return m_fragmentUniformLoopsSupported.getValue(m_context); } |
| 87 | bool isFragmentDynamicLoopSupported (void) const { return m_fragmentDynamicLoopsSupported.getValue(m_context); } |
| 88 | |
| 89 | private: |
| 90 | IsProgramSupported m_vertexUniformLoopsSupported; |
| 91 | IsProgramSupported m_vertexDynamicLoopsSupported; |
| 92 | |
| 93 | IsProgramSupported m_fragmentHighPrecisionSupported; |
| 94 | IsProgramSupported m_fragmentUniformLoopsSupported; |
| 95 | IsProgramSupported m_fragmentDynamicLoopsSupported; |
| 96 | }; |
| 97 | |
| 98 | static const char* s_defaultVertexShader = |
| 99 | "attribute highp vec4 a_position;\n" |
| 100 | "void main (void) {\n" |
| 101 | " gl_Position = a_position;\n" |
| 102 | "}\n"; |
| 103 | static const char* s_defaultFragmentShader = |
| 104 | "void main (void) {\n" |
| 105 | " gl_FragColor = vec4(1.0);\n" |
| 106 | "}\n"; |
| 107 | |
| 108 | static const char* s_vertexUniformLoopsSupported = |
| 109 | "attribute highp vec4 a_position;\n" |
| 110 | "uniform int u_numIters;\n" |
| 111 | "void main (void) {\n" |
| 112 | " gl_Position = a_position;\n" |
| 113 | " for (int i = 0; i < u_numIters; i++)\n" |
| 114 | " gl_Position += vec4(0.1);\n" |
| 115 | "}\n"; |
| 116 | static const char* s_vertexDynamicLoopsSupported = |
| 117 | "attribute highp vec4 a_position;\n" |
| 118 | "uniform mediump float a, b;\n" |
| 119 | "void main (void) {\n" |
| 120 | " gl_Position = a_position;\n" |
| 121 | " int numIters = a < b ? int(3.0*b) : int(a_position.x);\n" |
| 122 | " for (int i = 0; i < numIters; i++)\n" |
| 123 | " gl_Position += vec4(0.1);\n" |
| 124 | "}\n"; |
| 125 | |
| 126 | static const char* s_fragmentHighPrecisionSupported = |
| 127 | "varying highp vec4 v_color;\n" |
| 128 | "void main (void) {\n" |
| 129 | " highp float tmp = v_color.r;\n" |
| 130 | " gl_FragColor = v_color;\n" |
| 131 | "}\n"; |
| 132 | static const char* s_fragmentUniformLoopsSupported = |
| 133 | "varying mediump vec4 v_color;\n" |
| 134 | "uniform int u_numIters;\n" |
| 135 | "void main (void) {\n" |
| 136 | " gl_FragColor = v_color;\n" |
| 137 | " for (int i = 0; i < u_numIters; i++)\n" |
| 138 | " gl_FragColor += vec4(0.1);\n" |
| 139 | "}\n"; |
| 140 | static const char* s_fragmentDynamicLoopsSupported = |
| 141 | "varying mediump vec4 v_color;\n" |
| 142 | "uniform mediump float a, b;\n" |
| 143 | "void main (void) {\n" |
| 144 | " gl_FragColor = v_color;\n" |
| 145 | " int numIters = a < b ? int(3.0*b) : int(v_color.x);\n" |
| 146 | " for (int i = 0; i < numIters; i++)\n" |
| 147 | " gl_FragColor += vec4(0.1);\n" |
| 148 | "}\n"; |
| 149 | |
| 150 | ES2ContextInfo::ES2ContextInfo (const RenderContext& context) |
| 151 | : glu::ContextInfo (context) |
| 152 | , m_vertexUniformLoopsSupported (TryCompileProgram(s_vertexUniformLoopsSupported, s_defaultFragmentShader)) |
| 153 | , m_vertexDynamicLoopsSupported (TryCompileProgram(s_vertexDynamicLoopsSupported, s_defaultFragmentShader)) |
| 154 | , m_fragmentHighPrecisionSupported (TryCompileProgram(s_defaultVertexShader, s_fragmentHighPrecisionSupported)) |
| 155 | , m_fragmentUniformLoopsSupported (TryCompileProgram(s_defaultVertexShader, s_fragmentUniformLoopsSupported)) |
| 156 | , m_fragmentDynamicLoopsSupported (TryCompileProgram(s_defaultVertexShader, s_fragmentDynamicLoopsSupported)) |
| 157 | { |
| 158 | } |
| 159 | |
| 160 | static void split (vector<string>& dst, const string& src) |
| 161 | { |
| 162 | size_t start = 0; |
| 163 | size_t end = string::npos; |
| 164 | |
| 165 | while ((end = src.find(' ', start)) != string::npos) |
| 166 | { |
| 167 | dst.push_back(src.substr(start, end-start)); |
| 168 | start = end+1; |
| 169 | } |
| 170 | |
| 171 | if (start < end) |
| 172 | dst.push_back(src.substr(start, end-start)); |
| 173 | } |
| 174 | |
Jarkko Poyry | 3c82736 | 2014-09-02 11:48:52 +0300 | [diff] [blame] | 175 | set<int> GetCompressedTextureFormats::operator() (const RenderContext& context) const |
| 176 | { |
| 177 | const glw::Functions& gl = context.getFunctions(); |
| 178 | |
| 179 | int numFormats = 0; |
| 180 | gl.getIntegerv(GL_NUM_COMPRESSED_TEXTURE_FORMATS, &numFormats); |
| 181 | |
| 182 | vector<int> formats(numFormats); |
| 183 | if (numFormats > 0) |
| 184 | gl.getIntegerv(GL_COMPRESSED_TEXTURE_FORMATS, &formats[0]); |
| 185 | |
| 186 | GLU_EXPECT_NO_ERROR(gl.getError(), "glGetIntegerv(GL_COMPRESSED_TEXTURE_FORMATS) failed"); |
| 187 | |
| 188 | set<int> formatSet; |
| 189 | std::copy(formats.begin(), formats.end(), std::inserter(formatSet, formatSet.begin())); |
| 190 | |
| 191 | return formatSet; |
| 192 | } |
| 193 | |
| 194 | // ContextInfo |
| 195 | |
| 196 | ContextInfo::ContextInfo (const RenderContext& context) |
| 197 | : m_context(context) |
| 198 | { |
Mika Isojärvi | 460696f | 2016-02-11 16:19:58 -0800 | [diff] [blame] | 199 | const glw::Functions& gl = context.getFunctions(); |
| 200 | |
| 201 | if (context.getType().getAPI() == ApiType::es(2,0)) |
| 202 | { |
| 203 | const char* result = (const char*)gl.getString(GL_EXTENSIONS); |
| 204 | GLU_EXPECT_NO_ERROR(gl.getError(), "glGetString(GL_EXTENSIONS) failed"); |
| 205 | |
| 206 | split(m_extensions, string(result)); |
| 207 | } |
| 208 | else |
| 209 | { |
| 210 | int numExtensions = 0; |
| 211 | |
| 212 | gl.getIntegerv(GL_NUM_EXTENSIONS, &numExtensions); |
| 213 | GLU_EXPECT_NO_ERROR(gl.getError(), "glGetIntegerv(GL_NUM_EXTENSIONS) failed"); |
| 214 | |
| 215 | m_extensions.resize(numExtensions); |
| 216 | for (int ndx = 0; ndx < numExtensions; ndx++) |
| 217 | m_extensions[ndx] = (const char*)gl.getStringi(GL_EXTENSIONS, ndx); |
| 218 | GLU_EXPECT_NO_ERROR(gl.getError(), "glGetStringi(GL_EXTENSIONS, ndx) failed"); |
| 219 | } |
Jarkko Poyry | 3c82736 | 2014-09-02 11:48:52 +0300 | [diff] [blame] | 220 | } |
| 221 | |
| 222 | ContextInfo::~ContextInfo (void) |
| 223 | { |
| 224 | } |
| 225 | |
| 226 | int ContextInfo::getInt (int param) const |
| 227 | { |
| 228 | int val = -1; |
| 229 | m_context.getFunctions().getIntegerv(param, &val); |
| 230 | GLU_EXPECT_NO_ERROR(m_context.getFunctions().getError(), "glGetIntegerv() failed"); |
| 231 | return val; |
| 232 | } |
| 233 | |
| 234 | bool ContextInfo::getBool (int param) const |
| 235 | { |
| 236 | glw::GLboolean val = GL_FALSE; |
| 237 | m_context.getFunctions().getBooleanv(param, &val); |
| 238 | GLU_EXPECT_NO_ERROR(m_context.getFunctions().getError(), "glGetBooleanv() failed"); |
| 239 | return val != GL_FALSE; |
| 240 | } |
| 241 | |
| 242 | const char* ContextInfo::getString (int param) const |
| 243 | { |
| 244 | const char* str = (const char*)m_context.getFunctions().getString(param); |
| 245 | GLU_EXPECT_NO_ERROR(m_context.getFunctions().getError(), "glGetString() failed"); |
| 246 | return str; |
| 247 | } |
| 248 | |
| 249 | bool ContextInfo::isCompressedTextureFormatSupported (int format) const |
| 250 | { |
| 251 | const set<int>& formats = m_compressedTextureFormats.getValue(m_context); |
| 252 | return formats.find(format) != formats.end(); |
| 253 | } |
| 254 | |
| 255 | bool ContextInfo::isExtensionSupported (const char* name) const |
| 256 | { |
| 257 | const std::vector<std::string>& extensions = getExtensions(); |
| 258 | return std::find(extensions.begin(), extensions.end(), name) != extensions.end(); |
| 259 | } |
| 260 | |
Emmanuel Tanguy | 96d4f7b | 2019-10-07 13:49:25 +0100 | [diff] [blame] | 261 | bool ContextInfo::isES3Compatible() const |
| 262 | { |
Graeme Leese | 7d1658b | 2019-10-07 17:55:57 +0100 | [diff] [blame] | 263 | return IsES3Compatible(m_context.getFunctions()); |
Emmanuel Tanguy | 96d4f7b | 2019-10-07 13:49:25 +0100 | [diff] [blame] | 264 | } |
| 265 | |
Jarkko Poyry | 3c82736 | 2014-09-02 11:48:52 +0300 | [diff] [blame] | 266 | ContextInfo* ContextInfo::create (const RenderContext& context) |
| 267 | { |
| 268 | // ES2 uses special variant that checks support for various shader features |
| 269 | // by trying to compile shader programs. |
| 270 | if (context.getType().getAPI() == ApiType::es(2,0)) |
| 271 | return new ES2ContextInfo(context); |
| 272 | |
| 273 | return new ContextInfo(context); |
| 274 | } |
| 275 | |
| 276 | } // glu |