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24b12d626c
We were declaring a variable in the middle of the code. Blasphemy, for non-c99 compilers.
370 lines
10 KiB
C
370 lines
10 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Copyright (C) 2010 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, see <http://www.gnu.org/licenses/>.
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*
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* Authors:
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* Tao Zhao <tao.zhao@intel.com>
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* Damien Lespiau <damien.lespiau@intel.com>
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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 <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "clutter-debug.h"
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#include "clutter-main.h"
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#include "clutter-backend-cex100.h"
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#include "clutter-cex100.h"
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static gdl_plane_id_t gdl_plane = GDL_PLANE_ID_UPP_C;
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static guint gdl_n_buffers = CLUTTER_CEX100_TRIPLE_BUFFERING;
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G_DEFINE_TYPE (ClutterBackendCex100,
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clutter_backend_cex100,
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CLUTTER_TYPE_BACKEND_EGL)
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#ifdef CLUTTER_ENABLE_DEBUG
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static const gchar *
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gdl_get_plane_name (gdl_plane_id_t plane)
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{
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switch (plane)
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{
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case GDL_PLANE_ID_UPP_A:
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return "UPP_A";
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case GDL_PLANE_ID_UPP_B:
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return "UPP_B";
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case GDL_PLANE_ID_UPP_C:
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return "UPP_C";
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case GDL_PLANE_ID_UPP_D:
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return "UPP_D";
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case GDL_PLANE_ID_UPP_E:
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return "UPP_E";
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default:
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g_assert_not_reached ();
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}
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return NULL; /* never reached */
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}
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#endif
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static gboolean
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gdl_plane_init (gdl_display_id_t dpy,
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gdl_plane_id_t plane,
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gdl_pixel_format_t pixfmt)
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{
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gboolean ret = TRUE;
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gdl_color_space_t colorSpace = GDL_COLOR_SPACE_RGB;
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gdl_rectangle_t dstRect;
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gdl_display_info_t display_info;
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gdl_ret_t rc = GDL_SUCCESS;
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if (GDL_DISPLAY_ID_0 != dpy && GDL_DISPLAY_ID_1 != dpy)
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{
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g_warning ("Invalid display ID, must be GDL_DISPLAY_ID_0 or "
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"GDL_DISPLAY_ID_1.");
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return FALSE;
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}
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/* Init GDL library */
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rc = gdl_init (NULL);
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if (rc != GDL_SUCCESS)
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{
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g_warning ("GDL initialize failed. %s", gdl_get_error_string (rc));
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return FALSE;
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}
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rc = gdl_get_display_info (dpy, &display_info);
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if (rc != GDL_SUCCESS)
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{
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g_warning ("GDL failed to get display infomation: %s",
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gdl_get_error_string (rc));
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gdl_close ();
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return FALSE;
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}
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dstRect.origin.x = 0;
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dstRect.origin.y = 0;
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dstRect.width = display_info.tvmode.width;
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dstRect.height = display_info.tvmode.height;
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/* Configure the plane attribute. */
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rc = gdl_plane_reset (plane);
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if (rc == GDL_SUCCESS)
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rc = gdl_plane_config_begin (plane);
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if (rc == GDL_SUCCESS)
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rc = gdl_plane_set_attr (GDL_PLANE_SRC_COLOR_SPACE, &colorSpace);
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if (rc == GDL_SUCCESS)
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rc = gdl_plane_set_attr (GDL_PLANE_PIXEL_FORMAT, &pixfmt);
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if (rc == GDL_SUCCESS)
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rc = gdl_plane_set_attr (GDL_PLANE_DST_RECT, &dstRect);
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if (rc == GDL_SUCCESS)
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rc = gdl_plane_set_uint (GDL_PLANE_NUM_GFX_SURFACES, gdl_n_buffers);
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if (rc == GDL_SUCCESS)
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rc = gdl_plane_config_end (GDL_FALSE);
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else
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gdl_plane_config_end (GDL_TRUE);
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if (rc != GDL_SUCCESS)
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{
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g_warning ("GDL configuration failed: %s.", gdl_get_error_string (rc));
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ret = FALSE;
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}
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gdl_close ();
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return ret;
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}
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/*
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* ClutterBackendEGL implementation
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*/
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static gboolean
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clutter_backend_cex100_create_context (ClutterBackend *backend,
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GError **error)
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{
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ClutterBackendEGL *backend_egl = CLUTTER_BACKEND_EGL (backend);
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EGLConfig configs[2];
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EGLint config_count;
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EGLBoolean status;
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NativeWindowType window;
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EGLint cfg_attribs[] = {
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EGL_BUFFER_SIZE, EGL_DONT_CARE,
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EGL_RED_SIZE, 8,
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EGL_GREEN_SIZE, 8,
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EGL_BLUE_SIZE, 8,
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EGL_DEPTH_SIZE, 16,
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EGL_ALPHA_SIZE, 8,
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EGL_BIND_TO_TEXTURE_RGBA, EGL_TRUE,
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EGL_BIND_TO_TEXTURE_RGB, EGL_TRUE,
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#ifdef HAVE_COGL_GLES2
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EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
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#else /* HAVE_COGL_GLES2 */
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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#endif /* HAVE_COGL_GLES2 */
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EGL_NONE
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};
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if (backend_egl->egl_context != EGL_NO_CONTEXT)
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return TRUE;
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CLUTTER_NOTE (BACKEND, "Using the %s plane", gdl_get_plane_name (gdl_plane));
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/* Start by initializing the GDL plane */
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if (!gdl_plane_init (GDL_DISPLAY_ID_0, gdl_plane, GDL_PF_ARGB_32))
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{
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g_set_error (error, CLUTTER_INIT_ERROR,
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CLUTTER_INIT_ERROR_BACKEND,
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"Could not initialize the GDL plane");
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return FALSE;
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}
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window = (NativeWindowType) gdl_plane;
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status = eglGetConfigs (backend_egl->edpy,
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configs,
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2,
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&config_count);
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if (status != EGL_TRUE)
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{
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g_set_error (error, CLUTTER_INIT_ERROR,
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CLUTTER_INIT_ERROR_BACKEND,
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"No EGL configurations found");
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return FALSE;
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}
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status = eglChooseConfig (backend_egl->edpy,
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cfg_attribs,
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configs,
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G_N_ELEMENTS (configs),
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&config_count);
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if (status != EGL_TRUE)
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{
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g_set_error (error, CLUTTER_INIT_ERROR,
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CLUTTER_INIT_ERROR_BACKEND,
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"Unable to select a valid EGL configuration");
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return FALSE;
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}
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CLUTTER_NOTE (BACKEND, "Got %i configs", config_count);
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if (status != EGL_TRUE)
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{
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g_set_error (error, CLUTTER_INIT_ERROR,
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CLUTTER_INIT_ERROR_BACKEND,
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"Unable to Make Current Context for NULL");
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return FALSE;
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}
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if (G_UNLIKELY (backend_egl->egl_surface != EGL_NO_SURFACE))
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{
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eglDestroySurface (backend_egl->edpy, backend_egl->egl_surface);
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backend_egl->egl_surface = EGL_NO_SURFACE;
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}
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if (G_UNLIKELY (backend_egl->egl_context != NULL))
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{
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eglDestroyContext (backend_egl->edpy, backend_egl->egl_context);
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backend_egl->egl_context = NULL;
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}
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backend_egl->egl_surface = eglCreateWindowSurface (backend_egl->edpy,
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configs[0],
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window,
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NULL);
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if (backend_egl->egl_surface == EGL_NO_SURFACE)
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{
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g_set_error (error, CLUTTER_INIT_ERROR,
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CLUTTER_INIT_ERROR_BACKEND,
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"Unable to create EGL window surface");
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return FALSE;
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}
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#ifdef HAVE_COGL_GLES2
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{
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static const EGLint attribs[3] = {
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EGL_CONTEXT_CLIENT_VERSION, 2,
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EGL_NONE
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};
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backend_egl->egl_context = eglCreateContext (backend_egl->edpy,
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configs[0],
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EGL_NO_CONTEXT,
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attribs);
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}
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#else
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/* Seems some GLES implementations 1.x do not like attribs... */
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backend_egl->egl_context = eglCreateContext (backend_egl->edpy,
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configs[0],
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EGL_NO_CONTEXT,
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NULL);
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#endif
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if (backend_egl->egl_context == EGL_NO_CONTEXT)
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{
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g_set_error (error, CLUTTER_INIT_ERROR,
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CLUTTER_INIT_ERROR_BACKEND,
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"Unable to create a suitable EGL context");
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return FALSE;
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}
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CLUTTER_NOTE (GL, "Created EGL Context");
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CLUTTER_NOTE (BACKEND, "Setting context");
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/*
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* eglnative can have only one stage, so we store the EGL surface in the
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* backend itself, instead of the StageWindow implementation, and we make it
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* current immediately to make sure the Cogl and Clutter can query the EGL
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* context for features.
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*/
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status = eglMakeCurrent (backend_egl->edpy,
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backend_egl->egl_surface,
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backend_egl->egl_surface,
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backend_egl->egl_context);
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eglQuerySurface (backend_egl->edpy,
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backend_egl->egl_surface,
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EGL_WIDTH,
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&backend_egl->surface_width);
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eglQuerySurface (backend_egl->edpy,
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backend_egl->egl_surface,
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EGL_HEIGHT,
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&backend_egl->surface_height);
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CLUTTER_NOTE (BACKEND, "EGL surface is %ix%i",
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backend_egl->surface_width,
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backend_egl->surface_height);
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/*
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* For EGL backend, it needs to clear all the back buffers of the window
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* surface before drawing anything, otherwise the image will be blinking
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* heavily. The default eglWindowSurface has 3 gdl surfaces as the back
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* buffer, that's why glClear should be called 3 times.
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*/
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glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
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glClear (GL_COLOR_BUFFER_BIT);
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eglSwapBuffers (backend_egl->edpy, backend_egl->egl_surface);
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glClear (GL_COLOR_BUFFER_BIT);
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eglSwapBuffers (backend_egl->edpy, backend_egl->egl_surface);
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glClear (GL_COLOR_BUFFER_BIT);
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eglSwapBuffers (backend_egl->edpy, backend_egl->egl_surface);
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return TRUE;
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}
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/*
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* GObject implementation
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*/
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static void
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clutter_backend_cex100_class_init (ClutterBackendCex100Class *klass)
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{
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ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
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backend_class->create_context = clutter_backend_cex100_create_context;
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}
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static void
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clutter_backend_cex100_init (ClutterBackendCex100 *self)
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{
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}
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/* every backend must implement this function */
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GType
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_clutter_backend_impl_get_type (void)
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{
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return clutter_backend_cex100_get_type ();
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}
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void
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clutter_cex100_set_plane (gdl_plane_id_t plane)
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{
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g_return_if_fail (plane >= GDL_PLANE_ID_UPP_A && plane <= GDL_PLANE_ID_UPP_E);
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gdl_plane = plane;
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}
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void
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clutter_cex100_set_buffering_mode (ClutterCex100BufferingMode mode)
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{
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g_return_if_fail (mode == CLUTTER_CEX100_DOUBLE_BUFFERING ||
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mode == CLUTTER_CEX100_TRIPLE_BUFFERING);
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gdl_n_buffers = mode;
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}
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