614 lines
17 KiB
C++
614 lines
17 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2013 Blender Foundation.
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* All rights reserved.
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*/
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/** \file
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* \ingroup GHOST
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*
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* Definition of GHOST_ContextEGL class.
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*/
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#include "GHOST_ContextEGL.h"
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#include <set>
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#include <sstream>
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#include <vector>
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#include <cassert>
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#include <cstdio>
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#include <cstring>
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#define CASE_CODE_RETURN_STR(code) \
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case code: \
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return #code;
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static const char *get_egl_error_enum_string(EGLint error)
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{
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switch (error) {
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CASE_CODE_RETURN_STR(EGL_SUCCESS)
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CASE_CODE_RETURN_STR(EGL_NOT_INITIALIZED)
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CASE_CODE_RETURN_STR(EGL_BAD_ACCESS)
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CASE_CODE_RETURN_STR(EGL_BAD_ALLOC)
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CASE_CODE_RETURN_STR(EGL_BAD_ATTRIBUTE)
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CASE_CODE_RETURN_STR(EGL_BAD_CONTEXT)
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CASE_CODE_RETURN_STR(EGL_BAD_CONFIG)
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CASE_CODE_RETURN_STR(EGL_BAD_CURRENT_SURFACE)
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CASE_CODE_RETURN_STR(EGL_BAD_DISPLAY)
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CASE_CODE_RETURN_STR(EGL_BAD_SURFACE)
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CASE_CODE_RETURN_STR(EGL_BAD_MATCH)
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CASE_CODE_RETURN_STR(EGL_BAD_PARAMETER)
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CASE_CODE_RETURN_STR(EGL_BAD_NATIVE_PIXMAP)
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CASE_CODE_RETURN_STR(EGL_BAD_NATIVE_WINDOW)
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CASE_CODE_RETURN_STR(EGL_CONTEXT_LOST)
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default:
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return NULL;
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}
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}
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static const char *get_egl_error_message_string(EGLint error)
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{
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switch (error) {
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case EGL_SUCCESS:
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return "The last function succeeded without error.";
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case EGL_NOT_INITIALIZED:
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return (
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"EGL is not initialized, or could not be initialized, "
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"for the specified EGL display connection.");
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case EGL_BAD_ACCESS:
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return (
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"EGL cannot access a requested resource "
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"(for example a context is bound in another thread).");
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case EGL_BAD_ALLOC:
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return "EGL failed to allocate resources for the requested operation.";
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case EGL_BAD_ATTRIBUTE:
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return "An unrecognized attribute or attribute value was passed in the attribute list.";
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case EGL_BAD_CONTEXT:
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return "An EGLContext argument does not name a valid EGL rendering context.";
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case EGL_BAD_CONFIG:
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return "An EGLConfig argument does not name a valid EGL frame buffer configuration.";
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case EGL_BAD_CURRENT_SURFACE:
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return (
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"The current surface of the calling thread is a window, "
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"pixel buffer or pixmap that is no longer valid.");
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case EGL_BAD_DISPLAY:
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return "An EGLDisplay argument does not name a valid EGL display connection.";
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case EGL_BAD_SURFACE:
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return (
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"An EGLSurface argument does not name a valid surface "
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"(window, pixel buffer or pixmap) configured for GL rendering.");
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case EGL_BAD_MATCH:
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return (
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"Arguments are inconsistent "
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"(for example, a valid context requires buffers not supplied by a valid surface).");
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case EGL_BAD_PARAMETER:
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return "One or more argument values are invalid.";
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case EGL_BAD_NATIVE_PIXMAP:
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return "A NativePixmapType argument does not refer to a valid native pixmap.";
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case EGL_BAD_NATIVE_WINDOW:
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return "A NativeWindowType argument does not refer to a valid native window.";
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case EGL_CONTEXT_LOST:
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return (
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"A power management event has occurred. "
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"The application must destroy all contexts and reinitialize OpenGL ES state "
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"and objects to continue rendering.");
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default:
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return NULL;
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}
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}
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static bool egl_chk(bool result, const char *file = NULL, int line = 0, const char *text = NULL)
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{
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if (!result) {
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const EGLint error = eglGetError();
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const char *code = get_egl_error_enum_string(error);
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const char *msg = get_egl_error_message_string(error);
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#ifndef NDEBUG
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fprintf(stderr,
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"%s(%d):[%s] -> EGL Error (0x%04X): %s: %s\n",
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file,
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line,
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text,
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static_cast<unsigned int>(error),
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code ? code : "<Unknown>",
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msg ? msg : "<Unknown>");
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#else
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fprintf(stderr,
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"EGL Error (0x%04X): %s: %s\n",
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static_cast<unsigned int>(error),
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code ? code : "<Unknown>",
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msg ? msg : "<Unknown>");
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#endif
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}
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return result;
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}
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#ifndef NDEBUG
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# define EGL_CHK(x) egl_chk((x), __FILE__, __LINE__, # x)
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#else
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# define EGL_CHK(x) egl_chk(x)
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#endif
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static inline bool bindAPI(EGLenum api)
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{
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if (EGLEW_VERSION_1_2) {
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return (EGL_CHK(eglBindAPI(api)) == EGL_TRUE);
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}
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return false;
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}
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#ifdef WITH_GL_ANGLE
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HMODULE GHOST_ContextEGL::s_d3dcompiler = NULL;
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#endif
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EGLContext GHOST_ContextEGL::s_gl_sharedContext = EGL_NO_CONTEXT;
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EGLint GHOST_ContextEGL::s_gl_sharedCount = 0;
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EGLContext GHOST_ContextEGL::s_gles_sharedContext = EGL_NO_CONTEXT;
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EGLint GHOST_ContextEGL::s_gles_sharedCount = 0;
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EGLContext GHOST_ContextEGL::s_vg_sharedContext = EGL_NO_CONTEXT;
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EGLint GHOST_ContextEGL::s_vg_sharedCount = 0;
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#pragma warning(disable : 4715)
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template<typename T> T &choose_api(EGLenum api, T &a, T &b, T &c)
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{
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switch (api) {
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case EGL_OPENGL_API:
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return a;
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case EGL_OPENGL_ES_API:
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return b;
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case EGL_OPENVG_API:
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return c;
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default:
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abort();
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}
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}
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GHOST_ContextEGL::GHOST_ContextEGL(bool stereoVisual,
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EGLNativeWindowType nativeWindow,
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EGLNativeDisplayType nativeDisplay,
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EGLint contextProfileMask,
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EGLint contextMajorVersion,
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EGLint contextMinorVersion,
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EGLint contextFlags,
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EGLint contextResetNotificationStrategy,
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EGLenum api)
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: GHOST_Context(stereoVisual),
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m_nativeDisplay(nativeDisplay),
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m_nativeWindow(nativeWindow),
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m_contextProfileMask(contextProfileMask),
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m_contextMajorVersion(contextMajorVersion),
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m_contextMinorVersion(contextMinorVersion),
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m_contextFlags(contextFlags),
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m_contextResetNotificationStrategy(contextResetNotificationStrategy),
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m_api(api),
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m_context(EGL_NO_CONTEXT),
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m_surface(EGL_NO_SURFACE),
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m_display(EGL_NO_DISPLAY),
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m_swap_interval(1),
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m_sharedContext(
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choose_api(api, s_gl_sharedContext, s_gles_sharedContext, s_vg_sharedContext)),
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m_sharedCount(choose_api(api, s_gl_sharedCount, s_gles_sharedCount, s_vg_sharedCount))
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{
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}
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GHOST_ContextEGL::~GHOST_ContextEGL()
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{
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if (m_display != EGL_NO_DISPLAY) {
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bindAPI(m_api);
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if (m_context != EGL_NO_CONTEXT) {
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if (m_context == ::eglGetCurrentContext())
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EGL_CHK(::eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT));
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if (m_context != m_sharedContext || m_sharedCount == 1) {
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assert(m_sharedCount > 0);
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m_sharedCount--;
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if (m_sharedCount == 0)
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m_sharedContext = EGL_NO_CONTEXT;
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EGL_CHK(::eglDestroyContext(m_display, m_context));
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}
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}
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if (m_surface != EGL_NO_SURFACE)
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EGL_CHK(::eglDestroySurface(m_display, m_surface));
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}
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}
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GHOST_TSuccess GHOST_ContextEGL::swapBuffers()
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{
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return EGL_CHK(::eglSwapBuffers(m_display, m_surface)) ? GHOST_kSuccess : GHOST_kFailure;
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}
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GHOST_TSuccess GHOST_ContextEGL::setSwapInterval(int interval)
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{
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if (EGLEW_VERSION_1_1) {
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if (EGL_CHK(::eglSwapInterval(m_display, interval))) {
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m_swap_interval = interval;
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return GHOST_kSuccess;
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}
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else {
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return GHOST_kFailure;
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}
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}
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else {
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return GHOST_kFailure;
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}
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}
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GHOST_TSuccess GHOST_ContextEGL::getSwapInterval(int &intervalOut)
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{
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// This is a bit of a kludge because there does not seem to
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// be a way to query the swap interval with EGL.
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intervalOut = m_swap_interval;
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return GHOST_kSuccess;
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}
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GHOST_TSuccess GHOST_ContextEGL::activateDrawingContext()
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{
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if (m_display) {
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bindAPI(m_api);
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return EGL_CHK(::eglMakeCurrent(m_display, m_surface, m_surface, m_context)) ? GHOST_kSuccess :
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GHOST_kFailure;
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}
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else {
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return GHOST_kFailure;
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}
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}
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GHOST_TSuccess GHOST_ContextEGL::releaseDrawingContext()
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{
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if (m_display) {
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bindAPI(m_api);
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return EGL_CHK(::eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT)) ?
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GHOST_kSuccess :
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GHOST_kFailure;
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}
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else {
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return GHOST_kFailure;
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}
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}
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bool GHOST_ContextEGL::initContextEGLEW()
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{
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/* We have to manually get this function before we can call eglewInit, since
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* it requires a display argument. glewInit() does the same, but we only want
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* to initialize EGLEW here. */
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eglGetDisplay = (PFNEGLGETDISPLAYPROC)eglGetProcAddress("eglGetDisplay");
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if (eglGetDisplay == NULL) {
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return false;
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}
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if (!EGL_CHK((m_display = ::eglGetDisplay(m_nativeDisplay)) != EGL_NO_DISPLAY)) {
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return false;
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}
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if (GLEW_CHK(eglewInit(m_display)) != GLEW_OK) {
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fprintf(stderr, "Warning! EGLEW failed to initialize properly.\n");
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return false;
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}
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return true;
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}
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static const std::string &api_string(EGLenum api)
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{
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static const std::string a("OpenGL");
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static const std::string b("OpenGL ES");
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static const std::string c("OpenVG");
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return choose_api(api, a, b, c);
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}
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GHOST_TSuccess GHOST_ContextEGL::initializeDrawingContext()
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{
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// objects have to be declared here due to the use of goto
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std::vector<EGLint> attrib_list;
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EGLint num_config = 0;
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if (m_stereoVisual)
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fprintf(stderr, "Warning! Stereo OpenGL ES contexts are not supported.\n");
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m_stereoVisual = false; // It doesn't matter what the Window wants.
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if (!initContextEGLEW()) {
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return GHOST_kFailure;
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}
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#ifdef WITH_GL_ANGLE
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// d3dcompiler_XX.dll needs to be loaded before ANGLE will work
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if (s_d3dcompiler == NULL) {
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s_d3dcompiler = LoadLibrary(D3DCOMPILER);
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WIN32_CHK(s_d3dcompiler != NULL);
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if (s_d3dcompiler == NULL) {
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fprintf(stderr, "LoadLibrary(\"" D3DCOMPILER "\") failed!\n");
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return GHOST_kFailure;
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}
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}
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#endif
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EGLDisplay prev_display = eglGetCurrentDisplay();
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EGLSurface prev_draw = eglGetCurrentSurface(EGL_DRAW);
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EGLSurface prev_read = eglGetCurrentSurface(EGL_READ);
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EGLContext prev_context = eglGetCurrentContext();
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EGLint egl_major, egl_minor;
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if (!EGL_CHK(::eglInitialize(m_display, &egl_major, &egl_minor)))
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goto error;
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fprintf(stderr, "EGL Version %d.%d\n", egl_major, egl_minor);
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if (!EGL_CHK(::eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT)))
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goto error;
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if (!bindAPI(m_api))
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goto error;
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// build attribute list
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attrib_list.reserve(20);
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if (m_api == EGL_OPENGL_ES_API && EGLEW_VERSION_1_2) {
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// According to the spec it seems that you are required to set EGL_RENDERABLE_TYPE,
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// but some implementations (ANGLE) do not seem to care.
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if (m_contextMajorVersion == 1) {
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attrib_list.push_back(EGL_RENDERABLE_TYPE);
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attrib_list.push_back(EGL_OPENGL_ES_BIT);
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}
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else if (m_contextMajorVersion == 2) {
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attrib_list.push_back(EGL_RENDERABLE_TYPE);
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attrib_list.push_back(EGL_OPENGL_ES2_BIT);
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}
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else if (m_contextMajorVersion == 3) {
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attrib_list.push_back(EGL_RENDERABLE_TYPE);
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attrib_list.push_back(EGL_OPENGL_ES3_BIT_KHR);
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}
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else {
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fprintf(stderr,
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"Warning! Unable to request an ES context of version %d.%d\n",
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m_contextMajorVersion,
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m_contextMinorVersion);
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}
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if (!((m_contextMajorVersion == 1) || (m_contextMajorVersion == 2 && EGLEW_VERSION_1_3) ||
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(m_contextMajorVersion == 3 && /*EGLEW_VERSION_1_4 &&*/ EGLEW_KHR_create_context) ||
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(m_contextMajorVersion == 3 && EGLEW_VERSION_1_5))) {
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fprintf(stderr,
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"Warning! May not be able to create a version %d.%d ES context with version %d.%d "
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"of EGL\n",
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m_contextMajorVersion,
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m_contextMinorVersion,
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egl_major,
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egl_minor);
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}
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}
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else {
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attrib_list.push_back(EGL_RENDERABLE_TYPE);
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attrib_list.push_back(EGL_OPENGL_BIT);
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}
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attrib_list.push_back(EGL_RED_SIZE);
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attrib_list.push_back(8);
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attrib_list.push_back(EGL_GREEN_SIZE);
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attrib_list.push_back(8);
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attrib_list.push_back(EGL_BLUE_SIZE);
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attrib_list.push_back(8);
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#ifdef GHOST_OPENGL_ALPHA
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attrib_list.push_back(EGL_ALPHA_SIZE);
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attrib_list.push_back(8);
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#endif
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if (m_nativeWindow == 0) {
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// off-screen surface
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attrib_list.push_back(EGL_SURFACE_TYPE);
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attrib_list.push_back(EGL_PBUFFER_BIT);
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}
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attrib_list.push_back(EGL_NONE);
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EGLConfig config;
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if (!EGL_CHK(::eglChooseConfig(m_display, &(attrib_list[0]), &config, 1, &num_config)))
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goto error;
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// A common error is to assume that ChooseConfig worked because it returned EGL_TRUE
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if (num_config != 1) // num_config should be exactly 1
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goto error;
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if (m_nativeWindow != 0) {
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m_surface = ::eglCreateWindowSurface(m_display, config, m_nativeWindow, NULL);
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}
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else {
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static const EGLint pb_attrib_list[] = {
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EGL_WIDTH,
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1,
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EGL_HEIGHT,
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1,
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EGL_NONE,
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};
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m_surface = ::eglCreatePbufferSurface(m_display, config, pb_attrib_list);
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}
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if (!EGL_CHK(m_surface != EGL_NO_SURFACE))
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goto error;
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attrib_list.clear();
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if (EGLEW_VERSION_1_5 || EGLEW_KHR_create_context) {
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if (m_api == EGL_OPENGL_API || m_api == EGL_OPENGL_ES_API) {
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if (m_contextMajorVersion != 0) {
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attrib_list.push_back(EGL_CONTEXT_MAJOR_VERSION_KHR);
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attrib_list.push_back(m_contextMajorVersion);
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}
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if (m_contextMinorVersion != 0) {
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attrib_list.push_back(EGL_CONTEXT_MINOR_VERSION_KHR);
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attrib_list.push_back(m_contextMinorVersion);
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}
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if (m_contextFlags != 0) {
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attrib_list.push_back(EGL_CONTEXT_FLAGS_KHR);
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attrib_list.push_back(m_contextFlags);
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}
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}
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else {
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if (m_contextMajorVersion != 0 || m_contextMinorVersion != 0) {
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fprintf(stderr,
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"Warning! Cannot request specific versions of %s contexts.",
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api_string(m_api).c_str());
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}
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|
|
if (m_contextFlags != 0) {
|
|
fprintf(stderr, "Warning! Flags cannot be set on %s contexts.", api_string(m_api).c_str());
|
|
}
|
|
}
|
|
|
|
if (m_api == EGL_OPENGL_API) {
|
|
if (m_contextProfileMask != 0) {
|
|
attrib_list.push_back(EGL_CONTEXT_OPENGL_PROFILE_MASK_KHR);
|
|
attrib_list.push_back(m_contextProfileMask);
|
|
}
|
|
}
|
|
else {
|
|
if (m_contextProfileMask != 0)
|
|
fprintf(
|
|
stderr, "Warning! Cannot select profile for %s contexts.", api_string(m_api).c_str());
|
|
}
|
|
|
|
if (m_api == EGL_OPENGL_API || EGLEW_VERSION_1_5) {
|
|
if (m_contextResetNotificationStrategy != 0) {
|
|
attrib_list.push_back(EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR);
|
|
attrib_list.push_back(m_contextResetNotificationStrategy);
|
|
}
|
|
}
|
|
else {
|
|
if (m_contextResetNotificationStrategy != 0) {
|
|
fprintf(stderr,
|
|
"Warning! EGL %d.%d cannot set the reset notification strategy on %s contexts.",
|
|
egl_major,
|
|
egl_minor,
|
|
api_string(m_api).c_str());
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
if (m_api == EGL_OPENGL_ES_API) {
|
|
if (m_contextMajorVersion != 0) {
|
|
attrib_list.push_back(EGL_CONTEXT_CLIENT_VERSION);
|
|
attrib_list.push_back(m_contextMajorVersion);
|
|
}
|
|
}
|
|
else {
|
|
if (m_contextMajorVersion != 0 || m_contextMinorVersion != 0) {
|
|
fprintf(stderr,
|
|
"Warning! EGL %d.%d is unable to select between versions of %s.",
|
|
egl_major,
|
|
egl_minor,
|
|
api_string(m_api).c_str());
|
|
}
|
|
}
|
|
|
|
if (m_contextFlags != 0) {
|
|
fprintf(stderr, "Warning! EGL %d.%d is unable to set context flags.", egl_major, egl_minor);
|
|
}
|
|
if (m_contextProfileMask != 0) {
|
|
fprintf(stderr,
|
|
"Warning! EGL %d.%d is unable to select between profiles.",
|
|
egl_major,
|
|
egl_minor);
|
|
}
|
|
if (m_contextResetNotificationStrategy != 0) {
|
|
fprintf(stderr,
|
|
"Warning! EGL %d.%d is unable to set the reset notification strategies.",
|
|
egl_major,
|
|
egl_minor);
|
|
}
|
|
}
|
|
|
|
attrib_list.push_back(EGL_NONE);
|
|
|
|
m_context = ::eglCreateContext(m_display, config, m_sharedContext, &(attrib_list[0]));
|
|
|
|
if (!EGL_CHK(m_context != EGL_NO_CONTEXT))
|
|
goto error;
|
|
|
|
if (m_sharedContext == EGL_NO_CONTEXT)
|
|
m_sharedContext = m_context;
|
|
|
|
m_sharedCount++;
|
|
|
|
if (!EGL_CHK(::eglMakeCurrent(m_display, m_surface, m_surface, m_context)))
|
|
goto error;
|
|
|
|
initContextGLEW();
|
|
|
|
initClearGL();
|
|
::eglSwapBuffers(m_display, m_surface);
|
|
|
|
return GHOST_kSuccess;
|
|
|
|
error:
|
|
if (prev_display != EGL_NO_DISPLAY)
|
|
EGL_CHK(eglMakeCurrent(prev_display, prev_draw, prev_read, prev_context));
|
|
|
|
return GHOST_kFailure;
|
|
}
|
|
|
|
GHOST_TSuccess GHOST_ContextEGL::releaseNativeHandles()
|
|
{
|
|
m_nativeWindow = 0;
|
|
m_nativeDisplay = NULL;
|
|
|
|
return GHOST_kSuccess;
|
|
}
|