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