62a37d8e53
Cogl requires multi-texturing support. This is only available as an extension in GL 1.2 so we should check for it before accepting the driver. http://bugzilla.openedhand.com/show_bug.cgi?id=1875
549 lines
17 KiB
C
549 lines
17 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2007,2008,2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "cogl.h"
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#include "cogl-internal.h"
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#include "cogl-context.h"
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#define COGL_CHECK_GL_VERSION(driver_major, driver_minor, \
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target_major, target_minor) \
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((driver_major) > (target_major) || \
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((driver_major) == (target_major) && (driver_minor) >= (target_minor)))
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typedef struct _CoglGLSymbolTableEntry
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{
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const char *name;
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void *ptr;
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} CoglGLSymbolTableEntry;
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gboolean
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cogl_check_extension (const gchar *name, const gchar *ext)
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{
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gchar *end;
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gint name_len, n;
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if (name == NULL || ext == NULL)
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return FALSE;
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end = (gchar*)(ext + strlen(ext));
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name_len = strlen(name);
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while (ext < end)
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{
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n = strcspn(ext, " ");
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if ((name_len == n) && (!strncmp(name, ext, n)))
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return TRUE;
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ext += (n + 1);
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}
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return FALSE;
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}
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gboolean
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_cogl_resolve_gl_symbols (CoglGLSymbolTableEntry *symbol_table,
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const char *suffix)
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{
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int i;
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gboolean status = TRUE;
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for (i = 0; symbol_table[i].name; i++)
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{
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char *full_name = g_strdup_printf ("%s%s", symbol_table[i].name, suffix);
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*((CoglFuncPtr *)symbol_table[i].ptr) = cogl_get_proc_address (full_name);
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g_free (full_name);
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if (!*((CoglFuncPtr *)symbol_table[i].ptr))
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{
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status = FALSE;
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break;
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}
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}
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return status;
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}
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#ifdef HAVE_CLUTTER_OSX
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static gboolean
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really_enable_npot (void)
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{
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/* OSX backend + ATI Radeon X1600 + NPOT texture + GL_REPEAT seems to crash
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* http://bugzilla.openedhand.com/show_bug.cgi?id=929
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*
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* Temporary workaround until post 0.8 we rejig the features set up a
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* little to allow the backend to overide.
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*/
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const char *gl_renderer;
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const char *env_string;
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/* Regardless of hardware, allow user to decide. */
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env_string = g_getenv ("COGL_ENABLE_NPOT");
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if (env_string != NULL)
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return env_string[0] == '1';
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gl_renderer = (char*)glGetString (GL_RENDERER);
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if (strstr (gl_renderer, "ATI Radeon X1600") != NULL)
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return FALSE;
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return TRUE;
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}
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#endif
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static gboolean
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_cogl_get_gl_version (int *major_out, int *minor_out)
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{
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const char *version_string, *major_end, *minor_end;
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int major = 0, minor = 0;
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/* Get the OpenGL version number */
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if ((version_string = (const char *) glGetString (GL_VERSION)) == NULL)
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return FALSE;
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/* Extract the major number */
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for (major_end = version_string; *major_end >= '0'
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&& *major_end <= '9'; major_end++)
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major = (major * 10) + *major_end - '0';
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/* If there were no digits or the major number isn't followed by a
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dot then it is invalid */
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if (major_end == version_string || *major_end != '.')
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return FALSE;
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/* Extract the minor number */
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for (minor_end = major_end + 1; *minor_end >= '0'
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&& *minor_end <= '9'; minor_end++)
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minor = (minor * 10) + *minor_end - '0';
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/* If there were no digits or there is an unexpected character then
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it is invalid */
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if (minor_end == major_end + 1
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|| (*minor_end && *minor_end != ' ' && *minor_end != '.'))
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return FALSE;
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*major_out = major;
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*minor_out = minor;
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return TRUE;
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}
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gboolean
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_cogl_check_driver_valid (GError **error)
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{
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int major, minor;
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const gchar *gl_extensions;
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if (!_cogl_get_gl_version (&major, &minor))
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{
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g_set_error (error,
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COGL_DRIVER_ERROR,
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COGL_DRIVER_ERROR_UNKNOWN_VERSION,
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"The OpenGL version could not be determined");
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return FALSE;
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}
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/* GL 1.3 supports all of the required functionality in core */
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if (COGL_CHECK_GL_VERSION (major, minor, 1, 3))
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return TRUE;
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gl_extensions = (const gchar*) glGetString (GL_EXTENSIONS);
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/* OpenGL 1.2 is only supported if we have the multitexturing
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extension */
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if (!cogl_check_extension ("GL_ARB_multitexture", gl_extensions))
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{
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g_set_error (error,
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COGL_DRIVER_ERROR,
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COGL_DRIVER_ERROR_INVALID_VERSION,
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"The OpenGL driver is missing "
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"the GL_ARB_multitexture extension");
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return FALSE;
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}
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/* OpenGL 1.2 is required */
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if (!COGL_CHECK_GL_VERSION (major, minor, 1, 2))
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{
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g_set_error (error,
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COGL_DRIVER_ERROR,
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COGL_DRIVER_ERROR_INVALID_VERSION,
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"The OpenGL version of your driver (%i.%i) "
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"is not compatible with Cogl",
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major, minor);
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return FALSE;
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}
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return TRUE;
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}
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void
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_cogl_features_init (void)
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{
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CoglFeatureFlags flags = 0;
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const gchar *gl_extensions;
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GLint max_clip_planes = 0;
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GLint num_stencil_bits = 0;
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gboolean fbo_ARB = FALSE;
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gboolean fbo_EXT = FALSE;
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const char *suffix;
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int gl_major = 0, gl_minor = 0;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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_cogl_get_gl_version (&gl_major, &gl_minor);
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flags = COGL_FEATURE_TEXTURE_READ_PIXELS;
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gl_extensions = (const gchar*) glGetString (GL_EXTENSIONS);
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if (cogl_check_extension ("GL_ARB_texture_non_power_of_two", gl_extensions))
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{
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#ifdef HAVE_CLUTTER_OSX
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if (really_enable_npot ())
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#endif
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flags |= COGL_FEATURE_TEXTURE_NPOT;
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}
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#ifdef GL_YCBCR_MESA
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if (cogl_check_extension ("GL_MESA_ycbcr_texture", gl_extensions))
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{
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flags |= COGL_FEATURE_TEXTURE_YUV;
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}
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#endif
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if (cogl_check_extension ("GL_ARB_shader_objects", gl_extensions) &&
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cogl_check_extension ("GL_ARB_vertex_shader", gl_extensions) &&
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cogl_check_extension ("GL_ARB_fragment_shader", gl_extensions))
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{
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ctx->drv.pf_glCreateProgramObjectARB =
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(COGL_PFNGLCREATEPROGRAMOBJECTARBPROC)
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cogl_get_proc_address ("glCreateProgramObjectARB");
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ctx->drv.pf_glCreateShaderObjectARB =
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(COGL_PFNGLCREATESHADEROBJECTARBPROC)
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cogl_get_proc_address ("glCreateShaderObjectARB");
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ctx->drv.pf_glShaderSourceARB =
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(COGL_PFNGLSHADERSOURCEARBPROC)
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cogl_get_proc_address ("glShaderSourceARB");
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ctx->drv.pf_glCompileShaderARB =
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(COGL_PFNGLCOMPILESHADERARBPROC)
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cogl_get_proc_address ("glCompileShaderARB");
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ctx->drv.pf_glAttachObjectARB =
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(COGL_PFNGLATTACHOBJECTARBPROC)
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cogl_get_proc_address ("glAttachObjectARB");
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ctx->drv.pf_glLinkProgramARB =
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(COGL_PFNGLLINKPROGRAMARBPROC)
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cogl_get_proc_address ("glLinkProgramARB");
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ctx->drv.pf_glUseProgramObjectARB =
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(COGL_PFNGLUSEPROGRAMOBJECTARBPROC)
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cogl_get_proc_address ("glUseProgramObjectARB");
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ctx->drv.pf_glGetUniformLocationARB =
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(COGL_PFNGLGETUNIFORMLOCATIONARBPROC)
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cogl_get_proc_address ("glGetUniformLocationARB");
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ctx->drv.pf_glDeleteObjectARB =
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(COGL_PFNGLDELETEOBJECTARBPROC)
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cogl_get_proc_address ("glDeleteObjectARB");
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ctx->drv.pf_glGetInfoLogARB =
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(COGL_PFNGLGETINFOLOGARBPROC)
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cogl_get_proc_address ("glGetInfoLogARB");
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ctx->drv.pf_glGetObjectParameterivARB =
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(COGL_PFNGLGETOBJECTPARAMETERIVARBPROC)
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cogl_get_proc_address ("glGetObjectParameterivARB");
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ctx->drv.pf_glUniform1fARB =
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(COGL_PFNGLUNIFORM1FARBPROC)
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cogl_get_proc_address ("glUniform1fARB");
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ctx->drv.pf_glVertexAttribPointerARB =
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(COGL_PFNGLVERTEXATTRIBPOINTERARBPROC)
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cogl_get_proc_address ("glVertexAttribPointerARB");
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ctx->drv.pf_glEnableVertexAttribArrayARB =
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(COGL_PFNGLENABLEVERTEXATTRIBARRAYARBPROC)
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cogl_get_proc_address ("glEnableVertexAttribArrayARB");
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ctx->drv.pf_glDisableVertexAttribArrayARB =
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(COGL_PFNGLDISABLEVERTEXATTRIBARRAYARBPROC)
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cogl_get_proc_address ("glDisableVertexAttribArrayARB");
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ctx->drv.pf_glUniform2fARB =
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(COGL_PFNGLUNIFORM2FARBPROC)
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cogl_get_proc_address ("glUniform2fARB");
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ctx->drv.pf_glUniform3fARB =
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(COGL_PFNGLUNIFORM3FARBPROC)
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cogl_get_proc_address ("glUniform3fARB");
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ctx->drv.pf_glUniform4fARB =
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(COGL_PFNGLUNIFORM4FARBPROC)
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cogl_get_proc_address ("glUniform4fARB");
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ctx->drv.pf_glUniform1fvARB =
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(COGL_PFNGLUNIFORM1FVARBPROC)
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cogl_get_proc_address ("glUniform1fvARB");
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ctx->drv.pf_glUniform2fvARB =
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(COGL_PFNGLUNIFORM2FVARBPROC)
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cogl_get_proc_address ("glUniform2fvARB");
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ctx->drv.pf_glUniform3fvARB =
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(COGL_PFNGLUNIFORM3FVARBPROC)
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cogl_get_proc_address ("glUniform3fvARB");
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ctx->drv.pf_glUniform4fvARB =
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(COGL_PFNGLUNIFORM4FVARBPROC)
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cogl_get_proc_address ("glUniform4fvARB");
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ctx->drv.pf_glUniform1iARB =
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(COGL_PFNGLUNIFORM1IARBPROC)
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cogl_get_proc_address ("glUniform1iARB");
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ctx->drv.pf_glUniform2iARB =
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(COGL_PFNGLUNIFORM2IARBPROC)
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cogl_get_proc_address ("glUniform2iARB");
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ctx->drv.pf_glUniform3iARB =
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(COGL_PFNGLUNIFORM3IARBPROC)
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cogl_get_proc_address ("glUniform3iARB");
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ctx->drv.pf_glUniform4iARB =
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(COGL_PFNGLUNIFORM4IARBPROC)
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cogl_get_proc_address ("glUniform4iARB");
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ctx->drv.pf_glUniform1ivARB =
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(COGL_PFNGLUNIFORM1IVARBPROC)
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cogl_get_proc_address ("glUniform1ivARB");
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ctx->drv.pf_glUniform2ivARB =
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(COGL_PFNGLUNIFORM2IVARBPROC)
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cogl_get_proc_address ("glUniform2ivARB");
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ctx->drv.pf_glUniform3ivARB =
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(COGL_PFNGLUNIFORM3IVARBPROC)
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cogl_get_proc_address ("glUniform3ivARB");
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ctx->drv.pf_glUniform4ivARB =
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(COGL_PFNGLUNIFORM4IVARBPROC)
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cogl_get_proc_address ("glUniform4ivARB");
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ctx->drv.pf_glUniformMatrix2fvARB =
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(COGL_PFNGLUNIFORMMATRIX2FVARBPROC)
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cogl_get_proc_address ("glUniformMatrix2fvARB");
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ctx->drv.pf_glUniformMatrix3fvARB =
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(COGL_PFNGLUNIFORMMATRIX3FVARBPROC)
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cogl_get_proc_address ("glUniformMatrix3fvARB");
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ctx->drv.pf_glUniformMatrix4fvARB =
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(COGL_PFNGLUNIFORMMATRIX4FVARBPROC)
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cogl_get_proc_address ("glUniformMatrix4fvARB");
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if (ctx->drv.pf_glCreateProgramObjectARB &&
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ctx->drv.pf_glCreateShaderObjectARB &&
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ctx->drv.pf_glShaderSourceARB &&
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ctx->drv.pf_glCompileShaderARB &&
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ctx->drv.pf_glAttachObjectARB &&
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ctx->drv.pf_glLinkProgramARB &&
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ctx->drv.pf_glUseProgramObjectARB &&
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ctx->drv.pf_glGetUniformLocationARB &&
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ctx->drv.pf_glDeleteObjectARB &&
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ctx->drv.pf_glGetInfoLogARB &&
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ctx->drv.pf_glGetObjectParameterivARB &&
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ctx->drv.pf_glUniform1fARB &&
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ctx->drv.pf_glUniform2fARB &&
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ctx->drv.pf_glUniform3fARB &&
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ctx->drv.pf_glUniform4fARB &&
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ctx->drv.pf_glUniform1fvARB &&
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ctx->drv.pf_glUniform2fvARB &&
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ctx->drv.pf_glUniform3fvARB &&
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ctx->drv.pf_glUniform4fvARB &&
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ctx->drv.pf_glUniform1iARB &&
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ctx->drv.pf_glUniform2iARB &&
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ctx->drv.pf_glUniform3iARB &&
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ctx->drv.pf_glUniform4iARB &&
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ctx->drv.pf_glUniform1ivARB &&
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ctx->drv.pf_glUniform2ivARB &&
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ctx->drv.pf_glUniform3ivARB &&
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ctx->drv.pf_glUniform4ivARB &&
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ctx->drv.pf_glUniformMatrix2fvARB &&
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ctx->drv.pf_glUniformMatrix3fvARB &&
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ctx->drv.pf_glUniformMatrix4fvARB &&
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ctx->drv.pf_glVertexAttribPointerARB &&
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ctx->drv.pf_glEnableVertexAttribArrayARB &&
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ctx->drv.pf_glDisableVertexAttribArrayARB)
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flags |= COGL_FEATURE_SHADERS_GLSL;
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}
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fbo_ARB = cogl_check_extension ("GL_ARB_framebuffer_object", gl_extensions);
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if (fbo_ARB)
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suffix = "";
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else
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{
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fbo_EXT = cogl_check_extension ("GL_EXT_framebuffer_object", gl_extensions);
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if (fbo_EXT)
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suffix = "EXT";
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}
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if (fbo_ARB || fbo_EXT)
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{
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CoglGLSymbolTableEntry symbol_table[] = {
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{"glGenRenderbuffers", &ctx->drv.pf_glGenRenderbuffers},
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{"glDeleteRenderbuffers", &ctx->drv.pf_glDeleteRenderbuffers},
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{"glBindRenderbuffer", &ctx->drv.pf_glBindRenderbuffer},
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{"glRenderbufferStorage", &ctx->drv.pf_glRenderbufferStorage},
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{"glGenFramebuffers", &ctx->drv.pf_glGenFramebuffers},
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{"glBindFramebuffer", &ctx->drv.pf_glBindFramebuffer},
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{"glFramebufferTexture2D", &ctx->drv.pf_glFramebufferTexture2D},
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{"glFramebufferRenderbuffer", &ctx->drv.pf_glFramebufferRenderbuffer},
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{"glCheckFramebufferStatus", &ctx->drv.pf_glCheckFramebufferStatus},
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{"glDeleteFramebuffers", &ctx->drv.pf_glDeleteFramebuffers},
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{"glGenerateMipmap", &ctx->drv.pf_glGenerateMipmap},
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{NULL, NULL}
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};
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if (_cogl_resolve_gl_symbols (symbol_table, suffix))
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flags |= COGL_FEATURE_OFFSCREEN;
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}
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if (cogl_check_extension ("GL_EXT_framebuffer_blit", gl_extensions))
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{
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ctx->drv.pf_glBlitFramebufferEXT =
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(COGL_PFNGLBLITFRAMEBUFFEREXTPROC)
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cogl_get_proc_address ("glBlitFramebufferEXT");
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if (ctx->drv.pf_glBlitFramebufferEXT)
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flags |= COGL_FEATURE_OFFSCREEN_BLIT;
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}
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if (cogl_check_extension ("GL_EXT_framebuffer_multisample", gl_extensions))
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{
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ctx->drv.pf_glRenderbufferStorageMultisampleEXT =
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(COGL_PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC)
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cogl_get_proc_address ("glRenderbufferStorageMultisampleEXT");
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if (ctx->drv.pf_glRenderbufferStorageMultisampleEXT)
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flags |= COGL_FEATURE_OFFSCREEN_MULTISAMPLE;
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}
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GE( glGetIntegerv (GL_STENCIL_BITS, &num_stencil_bits) );
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/* We need at least three stencil bits to combine clips */
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if (num_stencil_bits > 2)
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flags |= COGL_FEATURE_STENCIL_BUFFER;
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GE( glGetIntegerv (GL_MAX_CLIP_PLANES, &max_clip_planes) );
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if (max_clip_planes >= 4)
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flags |= COGL_FEATURE_FOUR_CLIP_PLANES;
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if (cogl_check_extension ("GL_ARB_vertex_buffer_object", gl_extensions))
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{
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ctx->drv.pf_glGenBuffersARB =
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(COGL_PFNGLGENBUFFERSARBPROC)
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cogl_get_proc_address ("glGenBuffersARB");
|
|
ctx->drv.pf_glBindBufferARB =
|
|
(COGL_PFNGLBINDBUFFERARBPROC)
|
|
cogl_get_proc_address ("glBindBufferARB");
|
|
ctx->drv.pf_glBufferDataARB =
|
|
(COGL_PFNGLBUFFERDATAARBPROC)
|
|
cogl_get_proc_address ("glBufferDataARB");
|
|
ctx->drv.pf_glBufferSubDataARB =
|
|
(COGL_PFNGLBUFFERSUBDATAARBPROC)
|
|
cogl_get_proc_address ("glBufferSubDataARB");
|
|
ctx->drv.pf_glDeleteBuffersARB =
|
|
(COGL_PFNGLDELETEBUFFERSARBPROC)
|
|
cogl_get_proc_address ("glDeleteBuffersARB");
|
|
ctx->drv.pf_glMapBufferARB =
|
|
(COGL_PFNGLMAPBUFFERARBPROC)
|
|
cogl_get_proc_address ("glMapBufferARB");
|
|
ctx->drv.pf_glUnmapBufferARB =
|
|
(COGL_PFNGLUNMAPBUFFERARBPROC)
|
|
cogl_get_proc_address ("glUnmapBufferARB");
|
|
if (ctx->drv.pf_glGenBuffersARB
|
|
&& ctx->drv.pf_glBindBufferARB
|
|
&& ctx->drv.pf_glBufferDataARB
|
|
&& ctx->drv.pf_glBufferSubDataARB
|
|
&& ctx->drv.pf_glDeleteBuffersARB
|
|
&& ctx->drv.pf_glMapBufferARB
|
|
&& ctx->drv.pf_glUnmapBufferARB)
|
|
flags |= COGL_FEATURE_VBOS;
|
|
}
|
|
|
|
/* These should always be available because they are defined in GL
|
|
1.2, but we can't call it directly because under Windows
|
|
functions > 1.1 aren't exported */
|
|
ctx->drv.pf_glDrawRangeElements =
|
|
(COGL_PFNGLDRAWRANGEELEMENTSPROC)
|
|
cogl_get_proc_address ("glDrawRangeElements");
|
|
ctx->drv.pf_glBlendEquation =
|
|
(COGL_PFNGLBLENDEQUATIONPROC)
|
|
cogl_get_proc_address ("glBlendEquation");
|
|
ctx->drv.pf_glBlendColor =
|
|
(COGL_PFNGLBLENDCOLORPROC)
|
|
cogl_get_proc_address ("glBlendColor");
|
|
|
|
/* Available in 1.3 or in the GL_ARB_multitexture extension */
|
|
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 1, 3))
|
|
{
|
|
ctx->drv.pf_glActiveTexture =
|
|
(COGL_PFNGLACTIVETEXTUREPROC)
|
|
cogl_get_proc_address ("glActiveTexture");
|
|
ctx->drv.pf_glClientActiveTexture =
|
|
(COGL_PFNGLCLIENTACTIVETEXTUREPROC)
|
|
cogl_get_proc_address ("glClientActiveTexture");
|
|
}
|
|
else if (cogl_check_extension ("GL_ARB_multitexture", gl_extensions))
|
|
{
|
|
ctx->drv.pf_glActiveTexture =
|
|
(COGL_PFNGLACTIVETEXTUREPROC)
|
|
cogl_get_proc_address ("glActiveTextureARB");
|
|
ctx->drv.pf_glClientActiveTexture =
|
|
(COGL_PFNGLCLIENTACTIVETEXTUREPROC)
|
|
cogl_get_proc_address ("glClientActiveTextureARB");
|
|
}
|
|
|
|
/* Available in 1.4 */
|
|
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 1, 4))
|
|
ctx->drv.pf_glBlendFuncSeparate =
|
|
(COGL_PFNGLBLENDFUNCSEPARATEPROC)
|
|
cogl_get_proc_address ("glBlendFuncSeparate");
|
|
|
|
/* Available in 2.0 */
|
|
if (COGL_CHECK_GL_VERSION (gl_major, gl_minor, 2, 0))
|
|
ctx->drv.pf_glBlendEquationSeparate =
|
|
(COGL_PFNGLBLENDEQUATIONSEPARATEPROC)
|
|
cogl_get_proc_address ("glBlendEquationSeparate");
|
|
|
|
/* Cache features */
|
|
ctx->feature_flags = flags;
|
|
ctx->features_cached = TRUE;
|
|
}
|