gstreamer/gst-libs/gst/gl/gstglegl.c
2014-03-15 18:36:57 +01:00

279 lines
7.5 KiB
C

/*
* GStreamer
* Copyright (C) 2013 Sebastian Dröge <slomo@circular-chaos.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstglegl.h"
static const gchar *
gst_gl_egl_get_error_string (void)
{
EGLint nErr = eglGetError ();
switch (nErr) {
case EGL_SUCCESS:
return "EGL_SUCCESS";
case EGL_BAD_DISPLAY:
return "EGL_BAD_DISPLAY";
case EGL_NOT_INITIALIZED:
return "EGL_NOT_INITIALIZED";
case EGL_BAD_ACCESS:
return "EGL_BAD_ACCESS";
case EGL_BAD_ALLOC:
return "EGL_BAD_ALLOC";
case EGL_BAD_ATTRIBUTE:
return "EGL_BAD_ATTRIBUTE";
case EGL_BAD_CONFIG:
return "EGL_BAD_CONFIG";
case EGL_BAD_CONTEXT:
return "EGL_BAD_CONTEXT";
case EGL_BAD_CURRENT_SURFACE:
return "EGL_BAD_CURRENT_SURFACE";
case EGL_BAD_MATCH:
return "EGL_BAD_MATCH";
case EGL_BAD_NATIVE_PIXMAP:
return "EGL_BAD_NATIVE_PIXMAP";
case EGL_BAD_NATIVE_WINDOW:
return "EGL_BAD_NATIVE_WINDOW";
case EGL_BAD_PARAMETER:
return "EGL_BAD_PARAMETER";
case EGL_BAD_SURFACE:
return "EGL_BAD_SURFACE";
default:
return "unknown";
}
}
static gboolean
gst_gl_egl_choose_config (GstGLEGL * egl, GError ** error)
{
EGLint numConfigs;
gint i = 0;
EGLint config_attrib[20];
config_attrib[i++] = EGL_SURFACE_TYPE;
config_attrib[i++] = EGL_WINDOW_BIT;
config_attrib[i++] = EGL_RENDERABLE_TYPE;
if (egl->gl_api & GST_GL_API_GLES2)
config_attrib[i++] = EGL_OPENGL_ES2_BIT;
else
config_attrib[i++] = EGL_OPENGL_BIT;
config_attrib[i++] = EGL_DEPTH_SIZE;
config_attrib[i++] = 16;
config_attrib[i++] = EGL_NONE;
if (eglChooseConfig (egl->egl_display, config_attrib,
&egl->egl_config, 1, &numConfigs)) {
GST_INFO ("config set: %ld, %ld", (gulong) egl->egl_config,
(gulong) numConfigs);
} else {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_WRONG_CONFIG,
"Failed to set window configuration: %s",
gst_gl_egl_get_error_string ());
goto failure;
}
return TRUE;
failure:
return FALSE;
}
GstGLEGL *
gst_gl_egl_create_context (EGLDisplay display, EGLNativeWindowType window,
GstGLAPI gl_api, guintptr external_gl_context, GError ** error)
{
GstGLEGL *egl;
gint i = 0;
EGLint context_attrib[3];
EGLint majorVersion;
EGLint minorVersion;
egl = g_slice_new0 (GstGLEGL);
if ((gl_api & GST_GL_API_OPENGL) == GST_GL_API_NONE &&
(gl_api & GST_GL_API_GLES2) == GST_GL_API_NONE) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_WRONG_API,
"xEGL supports opengl or gles2");
goto failure;
}
egl->egl_display = display;
if (eglInitialize (egl->egl_display, &majorVersion, &minorVersion)) {
GST_INFO ("egl initialized, version: %d.%d", majorVersion, minorVersion);
} else {
g_set_error (error, GST_GL_WINDOW_ERROR,
GST_GL_WINDOW_ERROR_RESOURCE_UNAVAILABLE,
"Failed to initialize egl: %s", gst_gl_egl_get_error_string ());
goto failure;
}
if (gl_api & GST_GL_API_OPENGL) {
/* egl + opengl only available with EGL 1.4+ */
if (majorVersion == 1 && minorVersion <= 3) {
if ((gl_api & ~GST_GL_API_OPENGL) == GST_GL_API_NONE) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_OLD_LIBS,
"EGL version (%i.%i) too old for OpenGL support, (needed at least 1.4)",
majorVersion, minorVersion);
goto failure;
} else {
GST_WARNING
("EGL version (%i.%i) too old for OpenGL support, (needed at least 1.4)",
majorVersion, minorVersion);
if (gl_api & GST_GL_API_GLES2) {
goto try_gles2;
} else {
g_set_error (error, GST_GL_WINDOW_ERROR,
GST_GL_WINDOW_ERROR_WRONG_CONFIG,
"Failed to choose a suitable OpenGL API");
goto failure;
}
}
}
if (!eglBindAPI (EGL_OPENGL_API)) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_FAILED,
"Failed to bind OpenGL|ES API: %s", gst_gl_egl_get_error_string ());
goto failure;
}
egl->gl_api = GST_GL_API_OPENGL;
} else if (gl_api & GST_GL_API_GLES2) {
try_gles2:
if (!eglBindAPI (EGL_OPENGL_ES_API)) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_FAILED,
"Failed to bind OpenGL|ES API: %s", gst_gl_egl_get_error_string ());
goto failure;
}
egl->gl_api = GST_GL_API_GLES2;
}
if (!gst_gl_egl_choose_config (egl, error)) {
g_assert (error == NULL || *error != NULL);
goto failure;
}
GST_DEBUG ("about to create gl context\n");
if (egl->gl_api & GST_GL_API_GLES2) {
context_attrib[i++] = EGL_CONTEXT_CLIENT_VERSION;
context_attrib[i++] = 2;
}
context_attrib[i++] = EGL_NONE;
egl->egl_context =
eglCreateContext (egl->egl_display, egl->egl_config,
(EGLContext) external_gl_context, context_attrib);
if (egl->egl_context != EGL_NO_CONTEXT) {
GST_INFO ("gl context created: %ld", (gulong) egl->egl_context);
} else {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_CREATE_CONTEXT,
"Failed to create a OpenGL context: %s",
gst_gl_egl_get_error_string ());
goto failure;
}
egl->egl_surface =
eglCreateWindowSurface (egl->egl_display, egl->egl_config, window, NULL);
if (egl->egl_surface != EGL_NO_SURFACE) {
GST_INFO ("surface created");
} else {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_FAILED,
"Failed to create window surface: %s", gst_gl_egl_get_error_string ());
goto failure;
}
gst_gl_egl_activate (egl, TRUE);
return egl;
failure:
gst_gl_egl_destroy_context (egl);
return NULL;
}
void
gst_gl_egl_destroy_context (GstGLEGL * egl)
{
gst_gl_egl_activate (egl, FALSE);
if (egl->egl_surface)
eglDestroySurface (egl->egl_surface, egl->egl_display);
if (egl->egl_context)
eglDestroyContext (egl->egl_display, egl->egl_context);
if (egl->egl_display) {
eglTerminate (egl->egl_display);
eglReleaseThread ();
}
g_slice_free (GstGLEGL, egl);
}
gboolean
gst_gl_egl_activate (GstGLEGL * egl, gboolean activate)
{
gboolean result;
if (activate)
result = eglMakeCurrent (egl->egl_display, egl->egl_surface,
egl->egl_surface, egl->egl_context);
else
result = eglMakeCurrent (egl->egl_display, EGL_NO_SURFACE,
EGL_NO_SURFACE, EGL_NO_CONTEXT);
return result;
}
guintptr
gst_gl_egl_get_gl_context (GstGLEGL * egl)
{
return (guintptr) egl->egl_context;
}
void
gst_gl_egl_swap_buffers (GstGLEGL * egl)
{
eglSwapBuffers (egl->egl_display, egl->egl_surface);
}
GstGLAPI
gst_gl_egl_get_gl_api (GstGLEGL * egl)
{
return egl->gl_api;
}
gpointer
gst_gl_egl_get_proc_address (GstGLEGL * egl, const gchar * name)
{
gpointer result;
result = eglGetProcAddress (name);
return result;
}