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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2014 Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): Jason Wilkins
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file ghost/intern/GHOST_ContextSDL.cpp
* \ingroup GHOST
*
* Definition of GHOST_ContextSDL class.
*/
#include "GHOST_ContextSDL.h"
#include <vector>
#include <cassert>
#include <cstdio>
#include <cstring>
SDL_GLContext GHOST_ContextSDL::s_sharedContext = NULL;
int GHOST_ContextSDL::s_sharedCount = 0;
GHOST_ContextSDL::GHOST_ContextSDL(
bool stereoVisual,
GHOST_TUns16 numOfAASamples,
SDL_Window *window,
int contextProfileMask,
int contextMajorVersion,
int contextMinorVersion,
int contextFlags,
int contextResetNotificationStrategy)
: GHOST_Context(stereoVisual, numOfAASamples),
m_window(window),
m_contextProfileMask(contextProfileMask),
m_contextMajorVersion(contextMajorVersion),
m_contextMinorVersion(contextMinorVersion),
m_contextFlags(contextFlags),
m_contextResetNotificationStrategy(contextResetNotificationStrategy),
m_context(NULL)
{
assert(m_window != NULL);
}
GHOST_ContextSDL::~GHOST_ContextSDL()
{
if (m_context != NULL) {
if (m_window != 0 && m_context == SDL_GL_GetCurrentContext())
SDL_GL_MakeCurrent(m_window, m_context);
if (m_context != s_sharedContext || s_sharedCount == 1) {
assert(s_sharedCount > 0);
s_sharedCount--;
if (s_sharedCount == 0)
s_sharedContext = NULL;
SDL_GL_DeleteContext(m_context);
}
}
}
GHOST_TSuccess GHOST_ContextSDL::swapBuffers()
{
SDL_GL_SwapWindow(m_window);
return GHOST_kSuccess;
}
GHOST_TSuccess GHOST_ContextSDL::activateDrawingContext()
{
if (m_context) {
activateGLEW();
return SDL_GL_MakeCurrent(m_window, m_context) ? GHOST_kSuccess : GHOST_kFailure;
}
else {
return GHOST_kFailure;
}
}
GHOST_TSuccess GHOST_ContextSDL::initializeDrawingContext()
{
#ifdef GHOST_OPENGL_ALPHA
const bool needAlpha = true;
#else
const bool needAlpha = false;
#endif
#ifdef GHOST_OPENGL_STENCIL
const bool needStencil = true;
#else
const bool needStencil = false;
#endif
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, m_contextProfileMask);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, m_contextMajorVersion);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, m_contextMinorVersion);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, m_contextFlags);
SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
if (needAlpha) {
SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
}
if (needStencil) {
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 1);
}
if (m_stereoVisual) {
SDL_GL_SetAttribute(SDL_GL_STEREO, 1);
}
if (m_numOfAASamples) {
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1);
SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, m_numOfAASamples);
}
m_context = SDL_GL_CreateContext(m_window);
GHOST_TSuccess success;
if (m_context != NULL) {
if (!s_sharedContext)
s_sharedContext = m_context;
s_sharedCount++;
success = (SDL_GL_MakeCurrent(m_window, m_context) < 0) ?
GHOST_kFailure : GHOST_kSuccess;
initContextGLEW();
initClearGL();
SDL_GL_SwapWindow(m_window);
success = GHOST_kSuccess;
}
else {
success = GHOST_kFailure;
}
return success;
}
GHOST_TSuccess GHOST_ContextSDL::releaseNativeHandles()
{
m_window = NULL;
return GHOST_kSuccess;
}
GHOST_TSuccess GHOST_ContextSDL::setSwapInterval(int interval)
{
if (SDL_GL_SetSwapInterval(interval) != -1) {
return GHOST_kSuccess;
}
else {
return GHOST_kFailure;
}
}
GHOST_TSuccess GHOST_ContextSDL::getSwapInterval(int &intervalOut)
{
intervalOut = SDL_GL_GetSwapInterval();
return GHOST_kSuccess;
}
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