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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 
     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_FATAL("Impossible");				return GL_NONE;
     54 	}
     55 }
     56 
     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_FATAL("Unknown OpenGL ES version");
     71 			}
     72 		default:
     73 			DE_FATAL("Unknown GL API");
     74 	}
     75 
     76 	return 0;
     77 }
     78 
     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 
    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_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 
    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