#ifndef _GLURENDERCONTEXT_HPP
#define _GLURENDERCONTEXT_HPP
/*-------------------------------------------------------------------------
* drawElements Quality Program OpenGL ES Utilities
* ------------------------------------------------
*
* Copyright 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*//*!
* \file
* \brief OpenGL ES rendering context.
*//*--------------------------------------------------------------------*/
#include "tcuDefs.hpp"
namespace tcu
{
class CommandLine;
class Platform;
class RenderTarget;
}
namespace glw
{
class Functions;
class FunctionLoader;
}
namespace glu
{
class ContextType;
class ContextInfo;
enum Profile
{
PROFILE_ES = 0, //!< OpenGL ES
PROFILE_CORE, //!< OpenGL Core Profile
PROFILE_COMPATIBILITY, //!< OpenGL Compatibility Profile
PROFILE_LAST
};
enum ContextFlags
{
CONTEXT_ROBUST = (1<<0), //!< Robust context
CONTEXT_DEBUG = (1<<1), //!< Debug context
CONTEXT_FORWARD_COMPATIBLE = (1<<2) //!< Forward-compatible context
};
inline ContextFlags operator| (ContextFlags a, ContextFlags b) { return ContextFlags((deUint32)a|(deUint32)b); }
inline ContextFlags operator& (ContextFlags a, ContextFlags b) { return ContextFlags((deUint32)a&(deUint32)b); }
inline ContextFlags operator~ (ContextFlags a) { return ContextFlags(~(deUint32)a); }
/*--------------------------------------------------------------------*//*!
* \brief Rendering API version and profile.
*//*--------------------------------------------------------------------*/
class ApiType
{
public:
ApiType (void) : m_bits(pack(0, 0, PROFILE_LAST)) {}
ApiType (int major, int minor, Profile profile) : m_bits(pack(major, minor, profile)) {}
int getMajorVersion (void) const { return int((m_bits>>MAJOR_SHIFT) & ((1u<<MAJOR_BITS)-1u)); }
int getMinorVersion (void) const { return int((m_bits>>MINOR_SHIFT) & ((1u<<MINOR_BITS)-1u)); }
Profile getProfile (void) const { return Profile((m_bits>>PROFILE_SHIFT) & ((1u<<PROFILE_BITS)-1u)); }
bool operator== (ApiType other) const { return m_bits == other.m_bits; }
bool operator!= (ApiType other) const { return m_bits != other.m_bits; }
deUint32 getPacked (void) const { return m_bits; }
// Shorthands
static ApiType es (int major, int minor) { return ApiType(major, minor, PROFILE_ES); }
static ApiType core (int major, int minor) { return ApiType(major, minor, PROFILE_CORE); }
static ApiType compatibility (int major, int minor) { return ApiType(major, minor, PROFILE_COMPATIBILITY); }
protected:
ApiType (deUint32 bits) : m_bits(bits) {}
static ApiType fromBits (deUint32 bits) { return ApiType(bits); }
static deUint32 pack (int major, int minor, Profile profile);
deUint32 m_bits;
enum
{
MAJOR_BITS = 4,
MINOR_BITS = 4,
PROFILE_BITS = 2,
TOTAL_API_BITS = MAJOR_BITS+MINOR_BITS+PROFILE_BITS,
MAJOR_SHIFT = 0,
MINOR_SHIFT = MAJOR_SHIFT+MAJOR_BITS,
PROFILE_SHIFT = MINOR_SHIFT+MINOR_BITS
};
} DE_WARN_UNUSED_TYPE;
inline deUint32 ApiType::pack (int major, int minor, Profile profile)
{
deUint32 bits = 0;
DE_ASSERT((deUint32(major) & ~((1<<MAJOR_BITS)-1)) == 0);
DE_ASSERT((deUint32(minor) & ~((1<<MINOR_BITS)-1)) == 0);
DE_ASSERT((deUint32(profile) & ~((1<<PROFILE_BITS)-1)) == 0);
bits |= deUint32(major) << MAJOR_SHIFT;
bits |= deUint32(minor) << MINOR_SHIFT;
bits |= deUint32(profile) << PROFILE_SHIFT;
return bits;
}
/*--------------------------------------------------------------------*//*!
* \brief Rendering context type.
*
* ContextType differs from API type by adding context flags. They are
* crucial in for example determining when GL core context supports
* certain API version (forward-compatible bit).
*
* \note You should NEVER compare ContextTypes against each other, as
* you most likely don't want to take flags into account. For example
* the test code almost certainly doesn't want to check that you have
* EXACTLY ES3.1 context with debug, but without for example robustness.
*//*--------------------------------------------------------------------*/
class ContextType : private ApiType
{
public:
ContextType (void) {}
ContextType (int major, int minor, Profile profile, ContextFlags flags = ContextFlags(0));
explicit ContextType (ApiType apiType, ContextFlags flags = ContextFlags(0));
ApiType getAPI (void) const { return ApiType::fromBits(m_bits & ((1u<<TOTAL_API_BITS)-1u)); }
ContextFlags getFlags (void) const { return ContextFlags((m_bits>>FLAGS_SHIFT) & ((1u<<FLAGS_BITS)-1u)); }
using ApiType::getMajorVersion;
using ApiType::getMinorVersion;
using ApiType::getProfile;
protected:
static deUint32 pack (deUint32 apiBits, ContextFlags flags);
enum
{
FLAGS_BITS = 3,
TOTAL_CONTEXT_BITS = TOTAL_API_BITS+FLAGS_BITS,
FLAGS_SHIFT = TOTAL_API_BITS
};
} DE_WARN_UNUSED_TYPE;
inline ContextType::ContextType (int major, int minor, Profile profile, ContextFlags flags)
: ApiType(major, minor, profile)
{
m_bits = pack(m_bits, flags);
}
inline ContextType::ContextType (ApiType apiType, ContextFlags flags)
: ApiType(apiType)
{
m_bits = pack(m_bits, flags);
}
inline deUint32 ContextType::pack (deUint32 apiBits, ContextFlags flags)
{
deUint32 bits = apiBits;
DE_ASSERT((deUint32(flags) & ~((1<<FLAGS_BITS)-1)) == 0);
bits |= deUint32(flags) << FLAGS_SHIFT;
return bits;
}
inline bool isContextTypeES (ContextType type) { return type.getAPI().getProfile() == PROFILE_ES; }
inline bool isContextTypeGLCore (ContextType type) { return type.getAPI().getProfile() == PROFILE_CORE; }
inline bool isContextTypeGLCompatibility(ContextType type) { return type.getAPI().getProfile() == PROFILE_COMPATIBILITY; }
bool contextSupports (ContextType ctxType, ApiType requiredApiType);
/*--------------------------------------------------------------------*//*!
* \brief Rendering context abstraction.
*//*--------------------------------------------------------------------*/
class RenderContext
{
public:
RenderContext (void) {}
virtual ~RenderContext (void) {}
//! Get context type. Must match to type given to ContextFactory::createContext().
virtual ContextType getType (void) const = DE_NULL;
//! Get GL function table. Should be filled with all core entry points for context type.
virtual const glw::Functions& getFunctions (void) const = DE_NULL;
//! Get render target information.
virtual const tcu::RenderTarget& getRenderTarget (void) const = DE_NULL;
//! Do post-render actions (swap buffers for example).
virtual void postIterate (void) = DE_NULL;
//! Get default framebuffer.
virtual deUint32 getDefaultFramebuffer (void) const { return 0; }
private:
RenderContext (const RenderContext& other); // Not allowed!
RenderContext& operator= (const RenderContext& other); // Not allowed!
};
// Utilities
RenderContext* createDefaultRenderContext (tcu::Platform& platform, const tcu::CommandLine& cmdLine, ApiType apiType);
void initCoreFunctions (glw::Functions* dst, const glw::FunctionLoader* loader, ApiType apiType);
void initExtensionFunctions (glw::Functions* dst, const glw::FunctionLoader* loader, ApiType apiType, int numExtensions, const char* const* extensions);
// \note initFunctions() and initExtensionFunctions() without explicit extension list
// use glGetString* to query list of extensions, so it needs current GL context.
void initFunctions (glw::Functions* dst, const glw::FunctionLoader* loader, ApiType apiType);
void initExtensionFunctions (glw::Functions* dst, const glw::FunctionLoader* loader, ApiType apiType);
bool hasExtension (const glw::Functions& gl, ApiType apiType, const std::string& extension);
} // glu
#endif // _GLURENDERCONTEXT_HPP