mirror of
https://github.com/brl/mutter.git
synced 2024-11-27 02:20:43 -05:00
f85377372c
Adds missing notices, and ensures all the notices are consistent. The Cogl blurb also now reads: * Cogl * * An object oriented GL/GLES Abstraction/Utility Layer
494 lines
14 KiB
C
494 lines
14 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2007,2008,2009 Intel Corporation.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
#include <gmodule.h>
|
|
|
|
#include "cogl.h"
|
|
|
|
#ifdef HAVE_CLUTTER_GLX
|
|
#include <dlfcn.h>
|
|
#include <GL/glx.h>
|
|
|
|
typedef CoglFuncPtr (*GLXGetProcAddressProc) (const guint8 *procName);
|
|
#endif
|
|
|
|
#include "cogl-internal.h"
|
|
#include "cogl-context.h"
|
|
|
|
CoglFuncPtr
|
|
cogl_get_proc_address (const gchar* name)
|
|
{
|
|
/* Sucks to ifdef here but not other option..? would be nice to
|
|
* split the code up for more reuse (once more backends use this
|
|
*/
|
|
#if defined(HAVE_CLUTTER_GLX)
|
|
static GLXGetProcAddressProc get_proc_func = NULL;
|
|
static void *dlhand = NULL;
|
|
|
|
if (get_proc_func == NULL && dlhand == NULL)
|
|
{
|
|
dlhand = dlopen (NULL, RTLD_LAZY);
|
|
|
|
if (dlhand)
|
|
{
|
|
dlerror ();
|
|
|
|
get_proc_func =
|
|
(GLXGetProcAddressProc) dlsym (dlhand, "glXGetProcAddress");
|
|
|
|
if (dlerror () != NULL)
|
|
{
|
|
get_proc_func =
|
|
(GLXGetProcAddressProc) dlsym (dlhand, "glXGetProcAddressARB");
|
|
}
|
|
|
|
if (dlerror () != NULL)
|
|
{
|
|
get_proc_func = NULL;
|
|
g_warning ("failed to bind GLXGetProcAddress "
|
|
"or GLXGetProcAddressARB");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (get_proc_func)
|
|
return get_proc_func ((unsigned char*) name);
|
|
|
|
#elif defined(HAVE_CLUTTER_WIN32)
|
|
|
|
return (CoglFuncPtr) wglGetProcAddress ((LPCSTR) name);
|
|
|
|
#else /* HAVE_CLUTTER_WIN32 */
|
|
|
|
/* this should find the right function if the program is linked against a
|
|
* library providing it */
|
|
static GModule *module = NULL;
|
|
if (module == NULL)
|
|
module = g_module_open (NULL, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
|
|
|
|
if (module)
|
|
{
|
|
gpointer symbol;
|
|
|
|
if (g_module_symbol (module, name, &symbol))
|
|
return symbol;
|
|
}
|
|
|
|
#endif /* HAVE_CLUTTER_WIN32 */
|
|
|
|
return NULL;
|
|
}
|
|
|
|
gboolean
|
|
cogl_check_extension (const gchar *name, const gchar *ext)
|
|
{
|
|
gchar *end;
|
|
gint name_len, n;
|
|
|
|
if (name == NULL || ext == NULL)
|
|
return FALSE;
|
|
|
|
end = (gchar*)(ext + strlen(ext));
|
|
|
|
name_len = strlen(name);
|
|
|
|
while (ext < end)
|
|
{
|
|
n = strcspn(ext, " ");
|
|
|
|
if ((name_len == n) && (!strncmp(name, ext, n)))
|
|
return TRUE;
|
|
ext += (n + 1);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
#ifdef HAVE_CLUTTER_OSX
|
|
static gboolean
|
|
really_enable_npot (void)
|
|
{
|
|
/* OSX backend + ATI Radeon X1600 + NPOT texture + GL_REPEAT seems to crash
|
|
* http://bugzilla.openedhand.com/show_bug.cgi?id=929
|
|
*
|
|
* Temporary workaround until post 0.8 we rejig the features set up a
|
|
* little to allow the backend to overide.
|
|
*/
|
|
const char *gl_renderer;
|
|
const char *env_string;
|
|
|
|
/* Regardless of hardware, allow user to decide. */
|
|
env_string = g_getenv ("COGL_ENABLE_NPOT");
|
|
if (env_string != NULL)
|
|
return env_string[0] == '1';
|
|
|
|
gl_renderer = (char*)glGetString (GL_RENDERER);
|
|
if (strstr (gl_renderer, "ATI Radeon X1600") != NULL)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
_cogl_features_init (void)
|
|
{
|
|
CoglFeatureFlags flags = 0;
|
|
const gchar *gl_extensions;
|
|
GLint max_clip_planes = 0;
|
|
GLint num_stencil_bits = 0;
|
|
|
|
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
|
|
|
|
flags = COGL_FEATURE_TEXTURE_READ_PIXELS;
|
|
|
|
gl_extensions = (const gchar*) glGetString (GL_EXTENSIONS);
|
|
|
|
if (cogl_check_extension ("GL_ARB_texture_non_power_of_two", gl_extensions))
|
|
{
|
|
#ifdef HAVE_CLUTTER_OSX
|
|
if (really_enable_npot ())
|
|
#endif
|
|
flags |= COGL_FEATURE_TEXTURE_NPOT;
|
|
}
|
|
|
|
#ifdef GL_YCBCR_MESA
|
|
if (cogl_check_extension ("GL_MESA_ycbcr_texture", gl_extensions))
|
|
{
|
|
flags |= COGL_FEATURE_TEXTURE_YUV;
|
|
}
|
|
#endif
|
|
|
|
if (cogl_check_extension ("GL_ARB_shader_objects", gl_extensions) &&
|
|
cogl_check_extension ("GL_ARB_vertex_shader", gl_extensions) &&
|
|
cogl_check_extension ("GL_ARB_fragment_shader", gl_extensions))
|
|
{
|
|
ctx->pf_glCreateProgramObjectARB =
|
|
(COGL_PFNGLCREATEPROGRAMOBJECTARBPROC)
|
|
cogl_get_proc_address ("glCreateProgramObjectARB");
|
|
|
|
ctx->pf_glCreateShaderObjectARB =
|
|
(COGL_PFNGLCREATESHADEROBJECTARBPROC)
|
|
cogl_get_proc_address ("glCreateShaderObjectARB");
|
|
|
|
ctx->pf_glShaderSourceARB =
|
|
(COGL_PFNGLSHADERSOURCEARBPROC)
|
|
cogl_get_proc_address ("glShaderSourceARB");
|
|
|
|
ctx->pf_glCompileShaderARB =
|
|
(COGL_PFNGLCOMPILESHADERARBPROC)
|
|
cogl_get_proc_address ("glCompileShaderARB");
|
|
|
|
ctx->pf_glAttachObjectARB =
|
|
(COGL_PFNGLATTACHOBJECTARBPROC)
|
|
cogl_get_proc_address ("glAttachObjectARB");
|
|
|
|
ctx->pf_glLinkProgramARB =
|
|
(COGL_PFNGLLINKPROGRAMARBPROC)
|
|
cogl_get_proc_address ("glLinkProgramARB");
|
|
|
|
ctx->pf_glUseProgramObjectARB =
|
|
(COGL_PFNGLUSEPROGRAMOBJECTARBPROC)
|
|
cogl_get_proc_address ("glUseProgramObjectARB");
|
|
|
|
ctx->pf_glGetUniformLocationARB =
|
|
(COGL_PFNGLGETUNIFORMLOCATIONARBPROC)
|
|
cogl_get_proc_address ("glGetUniformLocationARB");
|
|
|
|
ctx->pf_glDeleteObjectARB =
|
|
(COGL_PFNGLDELETEOBJECTARBPROC)
|
|
cogl_get_proc_address ("glDeleteObjectARB");
|
|
|
|
ctx->pf_glGetInfoLogARB =
|
|
(COGL_PFNGLGETINFOLOGARBPROC)
|
|
cogl_get_proc_address ("glGetInfoLogARB");
|
|
|
|
ctx->pf_glGetObjectParameterivARB =
|
|
(COGL_PFNGLGETOBJECTPARAMETERIVARBPROC)
|
|
cogl_get_proc_address ("glGetObjectParameterivARB");
|
|
|
|
ctx->pf_glUniform1fARB =
|
|
(COGL_PFNGLUNIFORM1FARBPROC)
|
|
cogl_get_proc_address ("glUniform1fARB");
|
|
|
|
ctx->pf_glVertexAttribPointerARB =
|
|
(COGL_PFNGLVERTEXATTRIBPOINTERARBPROC)
|
|
cogl_get_proc_address ("glVertexAttribPointerARB");
|
|
|
|
ctx->pf_glEnableVertexAttribArrayARB =
|
|
(COGL_PFNGLENABLEVERTEXATTRIBARRAYARBPROC)
|
|
cogl_get_proc_address ("glEnableVertexAttribArrayARB");
|
|
|
|
ctx->pf_glDisableVertexAttribArrayARB =
|
|
(COGL_PFNGLDISABLEVERTEXATTRIBARRAYARBPROC)
|
|
cogl_get_proc_address ("glDisableVertexAttribArrayARB");
|
|
|
|
ctx->pf_glUniform2fARB =
|
|
(COGL_PFNGLUNIFORM2FARBPROC)
|
|
cogl_get_proc_address ("glUniform2fARB");
|
|
|
|
ctx->pf_glUniform3fARB =
|
|
(COGL_PFNGLUNIFORM3FARBPROC)
|
|
cogl_get_proc_address ("glUniform3fARB");
|
|
|
|
ctx->pf_glUniform4fARB =
|
|
(COGL_PFNGLUNIFORM4FARBPROC)
|
|
cogl_get_proc_address ("glUniform4fARB");
|
|
|
|
ctx->pf_glUniform1fvARB =
|
|
(COGL_PFNGLUNIFORM1FVARBPROC)
|
|
cogl_get_proc_address ("glUniform1fvARB");
|
|
|
|
ctx->pf_glUniform2fvARB =
|
|
(COGL_PFNGLUNIFORM2FVARBPROC)
|
|
cogl_get_proc_address ("glUniform2fvARB");
|
|
|
|
ctx->pf_glUniform3fvARB =
|
|
(COGL_PFNGLUNIFORM3FVARBPROC)
|
|
cogl_get_proc_address ("glUniform3fvARB");
|
|
|
|
ctx->pf_glUniform4fvARB =
|
|
(COGL_PFNGLUNIFORM4FVARBPROC)
|
|
cogl_get_proc_address ("glUniform4fvARB");
|
|
|
|
ctx->pf_glUniform1iARB =
|
|
(COGL_PFNGLUNIFORM1IARBPROC)
|
|
cogl_get_proc_address ("glUniform1iARB");
|
|
|
|
ctx->pf_glUniform2iARB =
|
|
(COGL_PFNGLUNIFORM2IARBPROC)
|
|
cogl_get_proc_address ("glUniform2iARB");
|
|
|
|
ctx->pf_glUniform3iARB =
|
|
(COGL_PFNGLUNIFORM3IARBPROC)
|
|
cogl_get_proc_address ("glUniform3iARB");
|
|
|
|
ctx->pf_glUniform4iARB =
|
|
(COGL_PFNGLUNIFORM4IARBPROC)
|
|
cogl_get_proc_address ("glUniform4iARB");
|
|
|
|
ctx->pf_glUniform1ivARB =
|
|
(COGL_PFNGLUNIFORM1IVARBPROC)
|
|
cogl_get_proc_address ("glUniform1ivARB");
|
|
|
|
ctx->pf_glUniform2ivARB =
|
|
(COGL_PFNGLUNIFORM2IVARBPROC)
|
|
cogl_get_proc_address ("glUniform2ivARB");
|
|
|
|
ctx->pf_glUniform3ivARB =
|
|
(COGL_PFNGLUNIFORM3IVARBPROC)
|
|
cogl_get_proc_address ("glUniform3ivARB");
|
|
|
|
ctx->pf_glUniform4ivARB =
|
|
(COGL_PFNGLUNIFORM4IVARBPROC)
|
|
cogl_get_proc_address ("glUniform4ivARB");
|
|
|
|
ctx->pf_glUniformMatrix2fvARB =
|
|
(COGL_PFNGLUNIFORMMATRIX2FVARBPROC)
|
|
cogl_get_proc_address ("glUniformMatrix2fvARB");
|
|
|
|
ctx->pf_glUniformMatrix3fvARB =
|
|
(COGL_PFNGLUNIFORMMATRIX3FVARBPROC)
|
|
cogl_get_proc_address ("glUniformMatrix3fvARB");
|
|
|
|
ctx->pf_glUniformMatrix4fvARB =
|
|
(COGL_PFNGLUNIFORMMATRIX4FVARBPROC)
|
|
cogl_get_proc_address ("glUniformMatrix4fvARB");
|
|
|
|
if (ctx->pf_glCreateProgramObjectARB &&
|
|
ctx->pf_glCreateShaderObjectARB &&
|
|
ctx->pf_glShaderSourceARB &&
|
|
ctx->pf_glCompileShaderARB &&
|
|
ctx->pf_glAttachObjectARB &&
|
|
ctx->pf_glLinkProgramARB &&
|
|
ctx->pf_glUseProgramObjectARB &&
|
|
ctx->pf_glGetUniformLocationARB &&
|
|
ctx->pf_glDeleteObjectARB &&
|
|
ctx->pf_glGetInfoLogARB &&
|
|
ctx->pf_glGetObjectParameterivARB &&
|
|
ctx->pf_glUniform1fARB &&
|
|
ctx->pf_glUniform2fARB &&
|
|
ctx->pf_glUniform3fARB &&
|
|
ctx->pf_glUniform4fARB &&
|
|
ctx->pf_glUniform1fvARB &&
|
|
ctx->pf_glUniform2fvARB &&
|
|
ctx->pf_glUniform3fvARB &&
|
|
ctx->pf_glUniform4fvARB &&
|
|
ctx->pf_glUniform1iARB &&
|
|
ctx->pf_glUniform2iARB &&
|
|
ctx->pf_glUniform3iARB &&
|
|
ctx->pf_glUniform4iARB &&
|
|
ctx->pf_glUniform1ivARB &&
|
|
ctx->pf_glUniform2ivARB &&
|
|
ctx->pf_glUniform3ivARB &&
|
|
ctx->pf_glUniform4ivARB &&
|
|
ctx->pf_glUniformMatrix2fvARB &&
|
|
ctx->pf_glUniformMatrix3fvARB &&
|
|
ctx->pf_glUniformMatrix4fvARB &&
|
|
ctx->pf_glVertexAttribPointerARB &&
|
|
ctx->pf_glEnableVertexAttribArrayARB &&
|
|
ctx->pf_glDisableVertexAttribArrayARB)
|
|
flags |= COGL_FEATURE_SHADERS_GLSL;
|
|
}
|
|
|
|
if (cogl_check_extension ("GL_EXT_framebuffer_object", gl_extensions) ||
|
|
cogl_check_extension ("GL_ARB_framebuffer_object", gl_extensions))
|
|
{
|
|
ctx->pf_glGenRenderbuffersEXT =
|
|
(COGL_PFNGLGENRENDERBUFFERSEXTPROC)
|
|
cogl_get_proc_address ("glGenRenderbuffersEXT");
|
|
|
|
ctx->pf_glDeleteRenderbuffersEXT =
|
|
(COGL_PFNGLDELETERENDERBUFFERSEXTPROC)
|
|
cogl_get_proc_address ("glDeleteRenderbuffersEXT");
|
|
|
|
ctx->pf_glBindRenderbufferEXT =
|
|
(COGL_PFNGLBINDRENDERBUFFEREXTPROC)
|
|
cogl_get_proc_address ("glBindRenderbufferEXT");
|
|
|
|
ctx->pf_glRenderbufferStorageEXT =
|
|
(COGL_PFNGLRENDERBUFFERSTORAGEEXTPROC)
|
|
cogl_get_proc_address ("glRenderbufferStorageEXT");
|
|
|
|
ctx->pf_glGenFramebuffersEXT =
|
|
(COGL_PFNGLGENFRAMEBUFFERSEXTPROC)
|
|
cogl_get_proc_address ("glGenFramebuffersEXT");
|
|
|
|
ctx->pf_glBindFramebufferEXT =
|
|
(COGL_PFNGLBINDFRAMEBUFFEREXTPROC)
|
|
cogl_get_proc_address ("glBindFramebufferEXT");
|
|
|
|
ctx->pf_glFramebufferTexture2DEXT =
|
|
(COGL_PFNGLFRAMEBUFFERTEXTURE2DEXTPROC)
|
|
cogl_get_proc_address ("glFramebufferTexture2DEXT");
|
|
|
|
ctx->pf_glFramebufferRenderbufferEXT =
|
|
(COGL_PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC)
|
|
cogl_get_proc_address ("glFramebufferRenderbufferEXT");
|
|
|
|
ctx->pf_glCheckFramebufferStatusEXT =
|
|
(COGL_PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC)
|
|
cogl_get_proc_address ("glCheckFramebufferStatusEXT");
|
|
|
|
ctx->pf_glDeleteFramebuffersEXT =
|
|
(COGL_PFNGLDELETEFRAMEBUFFERSEXTPROC)
|
|
cogl_get_proc_address ("glDeleteFramebuffersEXT");
|
|
|
|
if (ctx->pf_glGenRenderbuffersEXT &&
|
|
ctx->pf_glBindRenderbufferEXT &&
|
|
ctx->pf_glRenderbufferStorageEXT &&
|
|
ctx->pf_glGenFramebuffersEXT &&
|
|
ctx->pf_glBindFramebufferEXT &&
|
|
ctx->pf_glFramebufferTexture2DEXT &&
|
|
ctx->pf_glFramebufferRenderbufferEXT &&
|
|
ctx->pf_glCheckFramebufferStatusEXT &&
|
|
ctx->pf_glDeleteFramebuffersEXT)
|
|
flags |= COGL_FEATURE_OFFSCREEN;
|
|
}
|
|
|
|
if (cogl_check_extension ("GL_EXT_framebuffer_blit", gl_extensions))
|
|
{
|
|
ctx->pf_glBlitFramebufferEXT =
|
|
(COGL_PFNGLBLITFRAMEBUFFEREXTPROC)
|
|
cogl_get_proc_address ("glBlitFramebufferEXT");
|
|
|
|
if (ctx->pf_glBlitFramebufferEXT)
|
|
flags |= COGL_FEATURE_OFFSCREEN_BLIT;
|
|
}
|
|
|
|
if (cogl_check_extension ("GL_EXT_framebuffer_multisample", gl_extensions))
|
|
{
|
|
ctx->pf_glRenderbufferStorageMultisampleEXT =
|
|
(COGL_PFNGLRENDERBUFFERSTORAGEMULTISAMPLEEXTPROC)
|
|
cogl_get_proc_address ("glRenderbufferStorageMultisampleEXT");
|
|
|
|
if (ctx->pf_glRenderbufferStorageMultisampleEXT)
|
|
flags |= COGL_FEATURE_OFFSCREEN_MULTISAMPLE;
|
|
}
|
|
|
|
GE( glGetIntegerv (GL_STENCIL_BITS, &num_stencil_bits) );
|
|
/* We need at least three stencil bits to combine clips */
|
|
if (num_stencil_bits > 2)
|
|
flags |= COGL_FEATURE_STENCIL_BUFFER;
|
|
|
|
GE( glGetIntegerv (GL_MAX_CLIP_PLANES, &max_clip_planes) );
|
|
if (max_clip_planes >= 4)
|
|
flags |= COGL_FEATURE_FOUR_CLIP_PLANES;
|
|
|
|
if (cogl_check_extension ("GL_ARB_vertex_buffer_object", gl_extensions))
|
|
{
|
|
ctx->pf_glGenBuffersARB =
|
|
(COGL_PFNGLGENBUFFERSARBPROC)
|
|
cogl_get_proc_address ("glGenBuffersARB");
|
|
ctx->pf_glBindBufferARB =
|
|
(COGL_PFNGLBINDBUFFERARBPROC)
|
|
cogl_get_proc_address ("glBindBufferARB");
|
|
ctx->pf_glBufferDataARB =
|
|
(COGL_PFNGLBUFFERDATAARBPROC)
|
|
cogl_get_proc_address ("glBufferDataARB");
|
|
ctx->pf_glBufferSubDataARB =
|
|
(COGL_PFNGLBUFFERSUBDATAARBPROC)
|
|
cogl_get_proc_address ("glBufferSubDataARB");
|
|
ctx->pf_glDeleteBuffersARB =
|
|
(COGL_PFNGLDELETEBUFFERSARBPROC)
|
|
cogl_get_proc_address ("glDeleteBuffersARB");
|
|
ctx->pf_glMapBufferARB =
|
|
(COGL_PFNGLMAPBUFFERARBPROC)
|
|
cogl_get_proc_address ("glMapBufferARB");
|
|
ctx->pf_glUnmapBufferARB =
|
|
(COGL_PFNGLUNMAPBUFFERARBPROC)
|
|
cogl_get_proc_address ("glUnmapBufferARB");
|
|
if (ctx->pf_glGenBuffersARB
|
|
&& ctx->pf_glBindBufferARB
|
|
&& ctx->pf_glBufferDataARB
|
|
&& ctx->pf_glBufferSubDataARB
|
|
&& ctx->pf_glDeleteBuffersARB
|
|
&& ctx->pf_glMapBufferARB
|
|
&& ctx->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->pf_glDrawRangeElements =
|
|
(COGL_PFNGLDRAWRANGEELEMENTSPROC)
|
|
cogl_get_proc_address ("glDrawRangeElements");
|
|
ctx->pf_glActiveTexture =
|
|
(COGL_PFNGLACTIVETEXTUREPROC)
|
|
cogl_get_proc_address ("glActiveTexture");
|
|
ctx->pf_glClientActiveTexture =
|
|
(COGL_PFNGLCLIENTACTIVETEXTUREPROC)
|
|
cogl_get_proc_address ("glClientActiveTexture");
|
|
|
|
/* Cache features */
|
|
ctx->feature_flags = flags;
|
|
ctx->features_cached = TRUE;
|
|
}
|
|
|