nkeynes@1245: /**
nkeynes@1245:  * $Id$
nkeynes@1245:  *
nkeynes@1245:  * Window management using EGL.
nkeynes@1245:  *
nkeynes@1245:  * Copyright (c) 2012 Nathan Keynes.
nkeynes@1245:  *
nkeynes@1245:  * This program is free software; you can redistribute it and/or modify
nkeynes@1245:  * it under the terms of the GNU General Public License as published by
nkeynes@1245:  * the Free Software Foundation; either version 2 of the License, or
nkeynes@1245:  * (at your option) any later version.
nkeynes@1245:  *
nkeynes@1245:  * This program is distributed in the hope that it will be useful,
nkeynes@1245:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@1245:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@1245:  * GNU General Public License for more details.
nkeynes@1245:  */
nkeynes@1245: 
nkeynes@1245: #include "lxdream.h"
nkeynes@1245: #include "display.h"
nkeynes@1245: #include "video_egl.h"
nkeynes@1245: #include "video_gl.h"
nkeynes@1245: #include "pvr2/pvr2.h"
nkeynes@1245: #include "pvr2/glutil.h"
nkeynes@1245: 
nkeynes@1245: static const char *getEGLErrorString( EGLint code )
nkeynes@1245: {
nkeynes@1245:     switch( code ) {
nkeynes@1245:     case EGL_SUCCESS: return "OK";
nkeynes@1245:     case EGL_NOT_INITIALIZED: return "EGL not initialized";
nkeynes@1245:     case EGL_BAD_ACCESS: return "Bad access";
nkeynes@1245:     case EGL_BAD_ALLOC: return "Allocation failed";
nkeynes@1245:     case EGL_BAD_ATTRIBUTE: return "Bad attribute";
nkeynes@1245:     case EGL_BAD_CONTEXT: return "Bad context";
nkeynes@1245:     case EGL_BAD_CONFIG: return "Bad config";
nkeynes@1245:     case EGL_BAD_CURRENT_SURFACE: return "Bad current surface";
nkeynes@1245:     case EGL_BAD_DISPLAY: return "Bad display";
nkeynes@1245:     case EGL_BAD_MATCH: return "Bad match";
nkeynes@1245:     case EGL_BAD_PARAMETER: return "Bad parameter";
nkeynes@1245:     case EGL_BAD_NATIVE_PIXMAP: return "Bad native pixmap";
nkeynes@1245:     case EGL_BAD_NATIVE_WINDOW: return "Bad native window";
nkeynes@1245:     default: return "Unknown error";
nkeynes@1245:     }
nkeynes@1245: }
nkeynes@1245: 
nkeynes@1245: 
nkeynes@1245: static void logEGLError(const char *msg)
nkeynes@1245: {
nkeynes@1245:     EGLint error = eglGetError();
nkeynes@1245:     const char *errorStr = getEGLErrorString(error);
nkeynes@1245: 
nkeynes@1245:     ERROR( "%s: %s (%x)", msg, errorStr, error );
nkeynes@1245: }
nkeynes@1245: 
nkeynes@1245: static const EGLint RGB888_attributes[] = {
nkeynes@1245:         EGL_RED_SIZE,       8,
nkeynes@1245:         EGL_GREEN_SIZE,     8,
nkeynes@1245:         EGL_BLUE_SIZE,      8,
nkeynes@1245:         EGL_DEPTH_SIZE,     16,
nkeynes@1245:         EGL_STENCIL_SIZE,   8,
nkeynes@1245:         EGL_SURFACE_TYPE,   EGL_WINDOW_BIT,
nkeynes@1245:         EGL_RENDERABLE_TYPE,EGL_OPENGL_ES2_BIT,
nkeynes@1245:         EGL_NONE, EGL_NONE };
nkeynes@1245: 
nkeynes@1245: static const EGLint RGB565_attributes[] = {
nkeynes@1245:         EGL_RED_SIZE,       5,
nkeynes@1245:         EGL_GREEN_SIZE,     6,
nkeynes@1245:         EGL_BLUE_SIZE,      5,
nkeynes@1245:         EGL_DEPTH_SIZE,     16,
nkeynes@1245:         EGL_STENCIL_SIZE,   8,
nkeynes@1245:         EGL_SURFACE_TYPE,   EGL_WINDOW_BIT,
nkeynes@1245:         EGL_RENDERABLE_TYPE,EGL_OPENGL_ES2_BIT,
nkeynes@1245:         EGL_NONE, EGL_NONE };
nkeynes@1245: 
nkeynes@1287: static const EGLint alt_attributes[] = {
nkeynes@1287:         EGL_DEPTH_SIZE,     16,
nkeynes@1287:         EGL_STENCIL_SIZE,   8,
nkeynes@1287:         EGL_SURFACE_TYPE,   EGL_WINDOW_BIT,
nkeynes@1287:         EGL_RENDERABLE_TYPE,EGL_OPENGL_ES2_BIT,
nkeynes@1287:         EGL_NONE, EGL_NONE };
nkeynes@1287: 
nkeynes@1245: static const EGLint context_attributes[] = {
nkeynes@1245:         EGL_CONTEXT_CLIENT_VERSION, 2,
nkeynes@1245:         EGL_NONE, EGL_NONE };
nkeynes@1245: 
nkeynes@1275: static EGLDisplay display = EGL_NO_DISPLAY;
nkeynes@1245: static EGLContext context = EGL_NO_CONTEXT;
nkeynes@1245: static EGLSurface surface = EGL_NO_SURFACE;
nkeynes@1245: static gboolean fbo_created = FALSE;
nkeynes@1245: 
nkeynes@1287: static void video_egl_swap_buffers();
nkeynes@1287: static int video_egl_major = 0, video_egl_minor = 0;
nkeynes@1287: 
nkeynes@1287: gboolean video_egl_init()
nkeynes@1245: {
nkeynes@1245:     display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
nkeynes@1287:     if( eglInitialize(display, &video_egl_major, &video_egl_minor) != EGL_TRUE ) {
nkeynes@1245:         logEGLError( "Unable to initialise EGL display" );
nkeynes@1245:         return FALSE;
nkeynes@1245:     }
nkeynes@1287:     return TRUE;
nkeynes@1287: }
nkeynes@1287: 
nkeynes@1287: gboolean video_egl_init_context( EGLNativeWindowType window, int format )
nkeynes@1287: {
nkeynes@1287:     EGLConfig config;
nkeynes@1287:     EGLint num_config;
nkeynes@1287:     const EGLint *attribute_list;
nkeynes@1245: 
nkeynes@1245:     if( format == COLFMT_RGB565 || format == COLFMT_BGRA1555 ) {
nkeynes@1245:         attribute_list = RGB565_attributes;
nkeynes@1245:     } else {
nkeynes@1245:         attribute_list = RGB888_attributes;
nkeynes@1245:     }
nkeynes@1287:     eglChooseConfig(display, attribute_list, &config, 1, &num_config);
nkeynes@1245: 
nkeynes@1287:     surface = eglCreateWindowSurface(display, config, window, NULL);
nkeynes@1287:     if( surface == EGL_NO_SURFACE ) {
nkeynes@1287:         /* Try alternate config in case of failure. This provides a workaround for
nkeynes@1287:          * the Nokia N900 where eglCreateWindowSurface fails when color attributes
nkeynes@1287:          * are specified. (bug report: https://bugs.maemo.org/show_bug.cgi?id=9335)
nkeynes@1287:          */
nkeynes@1287:         eglChooseConfig(display, alt_attributes, &config, 1, &num_config);
nkeynes@1287:         surface = eglCreateWindowSurface(display, config, window, NULL);
nkeynes@1245: 
nkeynes@1287:         if( surface == EGL_NO_SURFACE ) {
nkeynes@1287:             logEGLError( "Unable to create EGL surface" );
nkeynes@1287:             video_egl_shutdown();
nkeynes@1287:             return FALSE;
nkeynes@1287:         }
nkeynes@1287:     }
nkeynes@1245: 
nkeynes@1245:     context = eglCreateContext(display, config, EGL_NO_CONTEXT, context_attributes);
nkeynes@1245:     if( context == EGL_NO_CONTEXT ) {
nkeynes@1245:         logEGLError( "Unable to create EGL context" );
nkeynes@1287:         video_egl_shutdown();
nkeynes@1245:         return FALSE;
nkeynes@1245:     }
nkeynes@1245: 
nkeynes@1287: 
nkeynes@1287: 
nkeynes@1287:     if( eglMakeCurrent( display, surface, surface, context ) == EGL_FALSE ) {
nkeynes@1287:         logEGLError( "Unable to make EGL context current" );
nkeynes@1287:         video_egl_shutdown();
nkeynes@1245:         return FALSE;
nkeynes@1245:     }
nkeynes@1245: 
nkeynes@1287:     return TRUE;
nkeynes@1287: }
nkeynes@1245: 
nkeynes@1287: gboolean video_egl_init_driver( display_driver_t driver )
nkeynes@1287: {
nkeynes@1287:     driver->swap_buffers = video_egl_swap_buffers;
nkeynes@1287:     driver->capabilities.depth_bits = 16; /* TODO: get from config info */
nkeynes@1287:     if( !gl_init_driver(driver, TRUE) ) {
nkeynes@1287:         video_egl_shutdown();
nkeynes@1245:         return FALSE;
nkeynes@1245:     }
nkeynes@1258:     fbo_created = TRUE;
nkeynes@1245:     return TRUE;
nkeynes@1245: }
nkeynes@1245: 
nkeynes@1287: void video_egl_shutdown()
nkeynes@1245: {
nkeynes@1245:     if( fbo_created ) {
nkeynes@1275:         pvr2_shutdown_gl_context();
nkeynes@1245:         gl_fbo_shutdown();
nkeynes@1245:         fbo_created = FALSE;
nkeynes@1245:     }
nkeynes@1245:     eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
nkeynes@1245:     if( surface != EGL_NO_SURFACE )  {
nkeynes@1245:         eglDestroySurface(display, surface);
nkeynes@1245:         surface = EGL_NO_SURFACE;
nkeynes@1245:     }
nkeynes@1245:     if( context != EGL_NO_CONTEXT ) {
nkeynes@1245:         eglDestroyContext(display, context);
nkeynes@1245:         context = EGL_NO_CONTEXT;
nkeynes@1245:     }
nkeynes@1275:     if( display != EGL_NO_DISPLAY ) {
nkeynes@1275:         eglTerminate(display);
nkeynes@1275:         display = EGL_NO_DISPLAY;
nkeynes@1275:     }
nkeynes@1287: }
nkeynes@1287: 
nkeynes@1287: gboolean video_egl_set_window(EGLNativeWindowType window, int width, int height, int format)
nkeynes@1287: {
nkeynes@1287:     if( ! video_egl_init() ||
nkeynes@1287:             ! video_egl_init_context( window, format ) ||
nkeynes@1287:             ! video_egl_init_driver( &display_egl_driver ) ) {
nkeynes@1287:         return FALSE;
nkeynes@1287:     }
nkeynes@1287:     gl_set_video_size(width, height, 0);
nkeynes@1287:     pvr2_setup_gl_context();
nkeynes@1287:     INFO( "Initialised EGL %d.%d", video_egl_major, video_egl_minor );
nkeynes@1287:     return TRUE;
nkeynes@1287: }
nkeynes@1287: 
nkeynes@1287: void video_egl_clear_window()
nkeynes@1287: {
nkeynes@1287:     video_egl_shutdown();
nkeynes@1275:     INFO( "Terminated EGL" );
nkeynes@1245: }
nkeynes@1245: 
nkeynes@1251: static void video_egl_swap_buffers()
nkeynes@1251: {
nkeynes@1251:     eglSwapBuffers(display, surface);
nkeynes@1251: }
nkeynes@1245: 
nkeynes@1245: 
nkeynes@1245: /**
nkeynes@1245:  * Minimal init and shutdown. The real work is done from set_window
nkeynes@1245:  */
nkeynes@1245: struct display_driver display_egl_driver = {
nkeynes@1245:         "egl", N_("OpenGLES driver"), NULL, NULL,
nkeynes@1245:         NULL, NULL, NULL,
nkeynes@1245:         NULL, NULL, NULL, NULL,
nkeynes@1245:         gl_load_frame_buffer, gl_display_render_buffer, gl_display_blank,
nkeynes@1251:         video_egl_swap_buffers, gl_read_render_buffer, NULL, NULL
nkeynes@1245: };