60781bc6c2
Add helper functions and macros for managing and drawing OpenGL ES 3. It will be used for blitting framebuffers between multiple GPUs in hybrid GPU systems. https://bugzilla.gnome.org/show_bug.cgi?id=785381
163 lines
3.8 KiB
C
163 lines
3.8 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/*
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* Copyright (C) 2017 Red Hat
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*
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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 as
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* published by the Free Software Foundation; either version 2 of the
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* 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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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*/
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#include <stdio.h>
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#include "config.h"
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#include "backends/meta-gles3.h"
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#include <dlfcn.h>
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#include <gio/gio.h>
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#include "backends/meta-gles3-table.h"
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struct _MetaGles3
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{
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GObject parent;
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MetaEgl *egl;
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MetaGles3Table table;
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};
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G_DEFINE_TYPE (MetaGles3, meta_gles3, G_TYPE_OBJECT)
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MetaGles3Table *
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meta_gles3_get_table (MetaGles3 *gles3)
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{
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return &gles3->table;
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}
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void
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meta_gles3_ensure_loaded (MetaGles3 *gles3,
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gpointer *func,
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const char *name)
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{
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GError *error = NULL;
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if (*func)
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return;
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*func = meta_egl_get_proc_address (gles3->egl, name, &error);
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if (!*func)
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g_error ("Failed to load GLES3 symbol: %s", error->message);
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}
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static const char *
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get_gl_error_str (GLenum gl_error)
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{
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switch (gl_error)
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{
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case GL_NO_ERROR:
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return "No error has been recorded.";
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case GL_INVALID_ENUM:
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return "An unacceptable value is specified for an enumerated argument.";
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case GL_INVALID_VALUE:
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return "A numeric argument is out of range.";
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case GL_INVALID_OPERATION:
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return "The specified operation is not allowed in the current state.";
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case GL_INVALID_FRAMEBUFFER_OPERATION:
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return "The framebuffer object is not complete.";
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case GL_OUT_OF_MEMORY:
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return "There is not enough memory left to execute the command.";
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default:
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return "Unknown error";
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}
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}
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void
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meta_gles3_clear_error (MetaGles3 *gles3)
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{
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while (TRUE)
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{
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GLenum gl_error = glGetError ();
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if (gl_error == GL_NO_ERROR)
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break;
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}
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}
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gboolean
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meta_gles3_validate (MetaGles3 *gles3,
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GError **error)
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{
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GLenum gl_error;
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gl_error = glGetError ();
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if (gl_error != GL_NO_ERROR)
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{
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g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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get_gl_error_str (gl_error));
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return FALSE;
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}
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return TRUE;
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}
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gboolean
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meta_gles3_has_extensions (MetaGles3 *gles3,
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char ***missing_extensions,
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char *first_extension,
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...)
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{
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va_list var_args;
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const char *extensions_str;
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gboolean has_extensions;
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extensions_str = (const char *) glGetString (GL_EXTENSIONS);
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if (!extensions_str)
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{
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g_warning ("Failed to get string: %s", get_gl_error_str (glGetError ()));
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return FALSE;
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}
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va_start (var_args, first_extension);
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has_extensions =
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meta_extensions_string_has_extensions_valist (extensions_str,
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missing_extensions,
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first_extension,
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var_args);
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va_end (var_args);
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return has_extensions;
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}
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MetaGles3 *
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meta_gles3_new (MetaEgl *egl)
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{
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MetaGles3 *gles3;
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gles3 = g_object_new (META_TYPE_GLES3, NULL);
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gles3->egl = egl;
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return gles3;
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}
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static void
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meta_gles3_init (MetaGles3 *gles3)
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{
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}
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static void
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meta_gles3_class_init (MetaGles3Class *klass)
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{
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}
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