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1 /*-------------------------------------------------------------------------
2  * drawElements Quality Program Tester Core
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 EGL utilities for interfacing with GL APIs.
22  *//*--------------------------------------------------------------------*/
23 
24 #include "egluGLUtil.hpp"
25 
26 #include "egluUtil.hpp"
27 #include "eglwLibrary.hpp"
28 #include "eglwEnums.hpp"
29 #include "glwEnums.hpp"
30 
31 #include <vector>
32 
33 using std::vector;
34 
35 namespace eglu
36 {
37 
38 using namespace eglw;
39 
getImageGLTarget(EGLenum source)40 glw::GLenum getImageGLTarget (EGLenum source)
41 {
42 	switch (source)
43 	{
44 		case EGL_GL_TEXTURE_2D_KHR:						return GL_TEXTURE_2D;
45 		case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR:	return GL_TEXTURE_CUBE_MAP_POSITIVE_X;
46 		case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_Y_KHR:	return GL_TEXTURE_CUBE_MAP_POSITIVE_Y;
47 		case EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_Z_KHR:	return GL_TEXTURE_CUBE_MAP_POSITIVE_Z;
48 		case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_X_KHR:	return GL_TEXTURE_CUBE_MAP_NEGATIVE_X;
49 		case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_KHR:	return GL_TEXTURE_CUBE_MAP_NEGATIVE_Y;
50 		case EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_KHR:	return GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;
51 		case EGL_GL_TEXTURE_3D_KHR:						return GL_TEXTURE_3D;
52 		case EGL_GL_RENDERBUFFER_KHR:					return GL_RENDERBUFFER;
53 		default:	DE_ASSERT(!"Impossible");			return GL_NONE;
54 	}
55 }
56 
apiRenderableType(glu::ApiType apiType)57 EGLint apiRenderableType (glu::ApiType apiType)
58 {
59 	switch (apiType.getProfile())
60 	{
61 		case glu::PROFILE_CORE:
62 		case glu::PROFILE_COMPATIBILITY:
63 			return EGL_OPENGL_BIT;
64 		case glu::PROFILE_ES:
65 			switch (apiType.getMajorVersion())
66 			{
67 				case 1:		return EGL_OPENGL_ES_BIT;
68 				case 2:		return EGL_OPENGL_ES2_BIT;
69 				case 3:		return EGL_OPENGL_ES3_BIT_KHR;
70 				default:	DE_ASSERT(!"Unknown OpenGL ES version");
71 			}
72 		default:
73 			DE_ASSERT(!"Unknown GL API");
74 	}
75 
76 	return 0;
77 }
78 
createGLContext(const Library & egl,EGLDisplay display,EGLContext eglConfig,const glu::ContextType & contextType)79 EGLContext createGLContext (const Library& egl, EGLDisplay display, EGLContext eglConfig, const glu::ContextType& contextType)
80 {
81 	const bool			khrCreateContextSupported	= hasExtension(egl, display, "EGL_KHR_create_context");
82 	EGLContext			context						= EGL_NO_CONTEXT;
83 	EGLenum				api							= EGL_NONE;
84 	vector<EGLint>		attribList;
85 
86 	if (glu::isContextTypeES(contextType))
87 	{
88 		api = EGL_OPENGL_ES_API;
89 
90 		if (contextType.getMajorVersion() <= 2)
91 		{
92 			attribList.push_back(EGL_CONTEXT_CLIENT_VERSION);
93 			attribList.push_back(contextType.getMajorVersion());
94 		}
95 		else
96 		{
97 			if (!khrCreateContextSupported)
98 				throw tcu::NotSupportedError("EGL_KHR_create_context is required for OpenGL ES 3.0 and newer", DE_NULL, __FILE__, __LINE__);
99 
100 			attribList.push_back(EGL_CONTEXT_MAJOR_VERSION_KHR);
101 			attribList.push_back(contextType.getMajorVersion());
102 			attribList.push_back(EGL_CONTEXT_MINOR_VERSION_KHR);
103 			attribList.push_back(contextType.getMinorVersion());
104 		}
105 	}
106 	else
107 	{
108 		DE_ASSERT(glu::isContextTypeGLCore(contextType) || glu::isContextTypeGLCompatibility(contextType));
109 
110 		if (!khrCreateContextSupported)
111 			throw tcu::NotSupportedError("EGL_KHR_create_context is required for OpenGL context creation", DE_NULL, __FILE__, __LINE__);
112 
113 		api = EGL_OPENGL_API;
114 
115 		attribList.push_back(EGL_CONTEXT_MAJOR_VERSION_KHR);
116 		attribList.push_back(contextType.getMajorVersion());
117 		attribList.push_back(EGL_CONTEXT_MINOR_VERSION_KHR);
118 		attribList.push_back(contextType.getMinorVersion());
119 		attribList.push_back(EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR);
120 		attribList.push_back(glu::isContextTypeGLCore(contextType) ? EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT_KHR
121 																   : EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT_KHR);
122 	}
123 
124 	if (contextType.getFlags() != glu::ContextFlags(0))
125 	{
126 		EGLint flags = 0;
127 
128 		if (!khrCreateContextSupported)
129 			throw tcu::NotSupportedError("EGL_KHR_create_context is required for creating robust/debug/forward-compatible contexts");
130 
131 		if ((contextType.getFlags() & glu::CONTEXT_DEBUG) != 0)
132 			flags |= EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR;
133 
134 		if ((contextType.getFlags() & glu::CONTEXT_ROBUST) != 0)
135 			flags |= EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR;
136 
137 		if ((contextType.getFlags() & glu::CONTEXT_FORWARD_COMPATIBLE) != 0)
138 		{
139 			if (!glu::isContextTypeGLCore(contextType))
140 				throw tcu::NotSupportedError("Only OpenGL core contexts can be forward-compatible");
141 
142 			flags |= EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR;
143 		}
144 
145 		attribList.push_back(EGL_CONTEXT_FLAGS_KHR);
146 		attribList.push_back(flags);
147 	}
148 
149 	attribList.push_back(EGL_NONE);
150 
151 	EGLU_CHECK_CALL(egl, bindAPI(api));
152 	context = egl.createContext(display, eglConfig, EGL_NO_CONTEXT, &(attribList[0]));
153 	EGLU_CHECK_MSG(egl, "eglCreateContext()");
154 
155 	return context;
156 }
157 
configMatches(const eglw::Library & egl,eglw::EGLDisplay display,eglw::EGLConfig eglConfig,const glu::RenderConfig & renderConfig)158 static bool configMatches (const eglw::Library& egl, eglw::EGLDisplay display, eglw::EGLConfig eglConfig, const glu::RenderConfig& renderConfig)
159 {
160 	// \todo [2014-03-12 pyry] Check other attributes like double-buffer bit.
161 
162 	{
163 		EGLint		renderableType		= 0;
164 		EGLint		requiredRenderable	= apiRenderableType(renderConfig.type.getAPI());
165 
166 		EGLU_CHECK_CALL(egl, getConfigAttrib(display, eglConfig, EGL_RENDERABLE_TYPE, &renderableType));
167 
168 		if ((renderableType & requiredRenderable) == 0)
169 			return false;
170 	}
171 
172 	if (renderConfig.surfaceType != (glu::RenderConfig::SurfaceType)glu::RenderConfig::DONT_CARE)
173 	{
174 		EGLint		surfaceType		= 0;
175 		EGLint		requiredSurface	= 0;
176 
177 		switch (renderConfig.surfaceType)
178 		{
179 			case glu::RenderConfig::SURFACETYPE_WINDOW:				requiredSurface = EGL_WINDOW_BIT;	break;
180 			case glu::RenderConfig::SURFACETYPE_OFFSCREEN_NATIVE:	requiredSurface = EGL_PIXMAP_BIT;	break;
181 			case glu::RenderConfig::SURFACETYPE_OFFSCREEN_GENERIC:	requiredSurface = EGL_PBUFFER_BIT;	break;
182 			default:
183 				DE_ASSERT(false);
184 		}
185 
186 		EGLU_CHECK_CALL(egl, getConfigAttrib(display, eglConfig, EGL_SURFACE_TYPE, &surfaceType));
187 
188 		if ((surfaceType & requiredSurface) == 0)
189 			return false;
190 	}
191 
192 	{
193 		static const struct
194 		{
195 			int	glu::RenderConfig::*field;
196 			EGLint attrib;
197 		} s_attribs[] =
198 		{
199 			{ &glu::RenderConfig::id,			EGL_CONFIG_ID		},
200 			{ &glu::RenderConfig::redBits,		EGL_RED_SIZE		},
201 			{ &glu::RenderConfig::greenBits,	EGL_GREEN_SIZE		},
202 			{ &glu::RenderConfig::blueBits,		EGL_BLUE_SIZE		},
203 			{ &glu::RenderConfig::alphaBits,	EGL_ALPHA_SIZE		},
204 			{ &glu::RenderConfig::depthBits,	EGL_DEPTH_SIZE		},
205 			{ &glu::RenderConfig::stencilBits,	EGL_STENCIL_SIZE	},
206 			{ &glu::RenderConfig::numSamples,	EGL_SAMPLES			},
207 		};
208 
209 		for (int attribNdx = 0; attribNdx < DE_LENGTH_OF_ARRAY(s_attribs); attribNdx++)
210 		{
211 			if (renderConfig.*s_attribs[attribNdx].field != glu::RenderConfig::DONT_CARE)
212 			{
213 				EGLint value = 0;
214 				EGLU_CHECK_CALL(egl, getConfigAttrib(display, eglConfig, s_attribs[attribNdx].attrib, &value));
215 				if (value != renderConfig.*s_attribs[attribNdx].field)
216 					return false;
217 			}
218 		}
219 	}
220 
221 	return true;
222 }
223 
chooseConfig(const Library & egl,EGLDisplay display,const glu::RenderConfig & config)224 EGLConfig chooseConfig (const Library& egl, EGLDisplay display, const glu::RenderConfig& config)
225 {
226 	const std::vector<EGLConfig> configs = eglu::getConfigs(egl, display);
227 
228 	for (vector<EGLConfig>::const_iterator iter = configs.begin(); iter != configs.end(); ++iter)
229 	{
230 		if (configMatches(egl, display, *iter, config))
231 			return *iter;
232 	}
233 
234 	throw tcu::NotSupportedError("Matching EGL config not found", DE_NULL, __FILE__, __LINE__);
235 }
236 
237 }
238