static void wgl_destroy_display(ALLEGRO_DISPLAY *disp)
{
ALLEGRO_SYSTEM_WIN *system = (ALLEGRO_SYSTEM_WIN *)al_get_system_driver();
ALLEGRO_DISPLAY_WGL *wgl_disp = (ALLEGRO_DISPLAY_WGL *)disp;
ALLEGRO_DISPLAY *old_disp = al_get_current_display();
if (old_disp != disp)
_al_set_current_display_only(disp);
if (system->mouse_grab_display == disp)
system->mouse_grab_display = NULL;
destroy_display_internals(wgl_disp);
_al_event_source_free(&disp->es);
_al_vector_find_and_delete(&system->system.displays, &disp);
_al_vector_free(&disp->bitmaps);
al_free(disp->ogl_extras);
if (old_disp != disp)
_al_set_current_display_only(old_disp);
al_free(disp->vertex_cache);
al_free(wgl_disp);
}
/* Function: al_destroy_display
*/
void al_destroy_display(ALLEGRO_DISPLAY *display)
{
if (display) {
/* This causes warnings and potential errors on Android because
* it clears the context and Android needs this thread to have
* the context bound in its destroy function and to destroy the
* shader. Just skip this part on Android.
*/
#ifndef ALLEGRO_ANDROID
ALLEGRO_BITMAP *bmp;
bmp = al_get_target_bitmap();
if (bmp && _al_get_bitmap_display(bmp) == display)
al_set_target_bitmap(NULL);
/* This can happen if we have a current display, but the target bitmap
* was a memory bitmap.
*/
if (display == al_get_current_display())
_al_set_current_display_only(NULL);
#endif
al_destroy_shader(display->default_shader);
display->default_shader = NULL;
ASSERT(display->vt);
display->vt->destroy_display(display);
}
}
/* Function: al_restore_state
*/
void al_restore_state(ALLEGRO_STATE const *state)
{
thread_local_state *tls;
INTERNAL_STATE *stored;
int flags;
if ((tls = tls_get()) == NULL)
return;
stored = (void *)state;
flags = stored->flags;
if (flags & ALLEGRO_STATE_NEW_DISPLAY_PARAMETERS) {
_STORE(new_display_flags);
_STORE(new_display_refresh_rate);
_STORE(new_display_adapter);
_STORE(new_window_x);
_STORE(new_window_y);
_STORE(new_display_settings);
}
if (flags & ALLEGRO_STATE_NEW_BITMAP_PARAMETERS) {
_STORE(new_bitmap_format);
_STORE(new_bitmap_flags);
}
if (flags & ALLEGRO_STATE_DISPLAY) {
_STORE(current_display);
_al_set_current_display_only(tls->current_display);
}
if (flags & ALLEGRO_STATE_TARGET_BITMAP) {
_STORE(target_bitmap);
al_set_target_bitmap(tls->target_bitmap);
}
if (flags & ALLEGRO_STATE_BLENDER) {
tls->current_blender = stored->stored_blender;
}
if (flags & ALLEGRO_STATE_NEW_FILE_INTERFACE) {
_STORE(new_file_interface);
_STORE(fs_interface);
}
if (flags & ALLEGRO_STATE_TRANSFORM) {
ALLEGRO_BITMAP *bitmap = al_get_target_bitmap();
if (bitmap)
al_use_transform(&stored->stored_transform);
}
}
/* Function: al_set_current_opengl_context
*/
void al_set_current_opengl_context(ALLEGRO_DISPLAY *display)
{
ASSERT(display);
if (!(display->flags & ALLEGRO_OPENGL))
return;
if (display) {
ALLEGRO_BITMAP *bmp = al_get_target_bitmap();
if (bmp && bmp->display && bmp->display != display) {
al_set_target_bitmap(NULL);
}
}
_al_set_current_display_only(display);
}
static void raspberrypi_destroy_display(ALLEGRO_DISPLAY *d)
{
ALLEGRO_DISPLAY_RASPBERRYPI *pidisplay = (ALLEGRO_DISPLAY_RASPBERRYPI *)d;
hide_cursor(pidisplay);
delete_cursor_data(pidisplay);
_al_set_current_display_only(d);
while (d->bitmaps._size > 0) {
ALLEGRO_BITMAP **bptr = (ALLEGRO_BITMAP **)_al_vector_ref_back(&d->bitmaps);
ALLEGRO_BITMAP *b = *bptr;
_al_convert_to_memory_bitmap(b);
}
_al_event_source_free(&d->es);
ALLEGRO_SYSTEM_RASPBERRYPI *system = (void *)al_get_system_driver();
_al_vector_find_and_delete(&system->system.displays, &d);
eglMakeCurrent(egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglDestroySurface(egl_display, egl_window);
eglDestroyContext(egl_display, egl_context);
eglTerminate(egl_display);
if (getenv("DISPLAY")) {
_al_mutex_lock(&system->lock);
XUnmapWindow(system->x11display, pidisplay->window);
XDestroyWindow(system->x11display, pidisplay->window);
_al_mutex_unlock(&system->lock);
}
if (system->mouse_grab_display == d) {
system->mouse_grab_display = NULL;
}
}
ALLEGRO_LOCKED_REGION *_al_ogl_lock_region_new(ALLEGRO_BITMAP *bitmap,
int x, int y, int w, int h, int format, int flags)
{
ALLEGRO_BITMAP_EXTRA_OPENGL * const ogl_bitmap = bitmap->extra;
const GLint gl_y = bitmap->h - y - h;
ALLEGRO_DISPLAY *disp;
ALLEGRO_DISPLAY *old_disp = NULL;
ALLEGRO_BITMAP *old_target = al_get_target_bitmap();
GLenum e;
bool ok;
bool restore_fbo = false;
if (format == ALLEGRO_PIXEL_FORMAT_ANY) {
/* Never pick compressed formats with ANY, as it interacts weirdly with
* existing code (e.g. al_get_pixel_size() etc) */
int bitmap_format = al_get_bitmap_format(bitmap);
if (_al_pixel_format_is_compressed(bitmap_format)) {
// XXX Get a good format from the driver?
format = ALLEGRO_PIXEL_FORMAT_ABGR_8888_LE;
}
else {
format = bitmap_format;
}
}
disp = al_get_current_display();
format = _al_get_real_pixel_format(disp, format);
/* Change OpenGL context if necessary. */
if (!disp ||
(_al_get_bitmap_display(bitmap)->ogl_extras->is_shared == false &&
_al_get_bitmap_display(bitmap) != disp))
{
old_disp = disp;
_al_set_current_display_only(_al_get_bitmap_display(bitmap));
}
ok = true;
/* Set up the pixel store state. We will need to match it when unlocking.
* There may be other pixel store state we should be setting.
* See also pitfalls 7 & 8 from:
* http://www.opengl.org/resources/features/KilgardTechniques/oglpitfall/
*/
glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
{
const int pixel_size = al_get_pixel_size(format);
const int pixel_alignment = ogl_pixel_alignment(pixel_size);
glPixelStorei(GL_PACK_ALIGNMENT, pixel_alignment);
e = glGetError();
if (e) {
ALLEGRO_ERROR("glPixelStorei(GL_PACK_ALIGNMENT, %d) failed (%s).\n",
pixel_alignment, _al_gl_error_string(e));
ok = false;
}
}
if (ok) {
if (ogl_bitmap->is_backbuffer) {
ALLEGRO_DEBUG("Locking backbuffer\n");
ok = ogl_lock_region_backbuffer(bitmap, ogl_bitmap,
x, gl_y, w, h, format, flags);
}
else if (flags & ALLEGRO_LOCK_WRITEONLY) {
ALLEGRO_DEBUG("Locking non-backbuffer WRITEONLY\n");
ok = ogl_lock_region_nonbb_writeonly(bitmap, ogl_bitmap,
x, gl_y, w, h, format);
}
else {
ALLEGRO_DEBUG("Locking non-backbuffer READWRITE\n");
ok = ogl_lock_region_nonbb_readwrite(bitmap, ogl_bitmap,
x, gl_y, w, h, format, &restore_fbo);
}
}
glPopClientAttrib();
/* Restore state after switching FBO. */
if (restore_fbo) {
if (!old_target) {
/* Old target was NULL; release the context. */
_al_set_current_display_only(NULL);
}
else if (!_al_get_bitmap_display(old_target)) {
/* Old target was memory bitmap; leave the current display alone. */
}
else if (old_target != bitmap) {
/* Old target was another OpenGL bitmap. */
_al_ogl_setup_fbo(_al_get_bitmap_display(old_target), old_target);
}
}
ASSERT(al_get_target_bitmap() == old_target);
if (old_disp != NULL) {
_al_set_current_display_only(old_disp);
}
if (ok) {
return &bitmap->locked_region;
}
ALLEGRO_ERROR("Failed to lock region\n");
ASSERT(ogl_bitmap->lock_buffer == NULL);
return NULL;
}
static void ogl_unlock_region_non_readonly(ALLEGRO_BITMAP *bitmap,
ALLEGRO_BITMAP_EXTRA_OPENGL *ogl_bitmap)
{
const int lock_format = bitmap->locked_region.format;
const int gl_y = bitmap->h - bitmap->lock_y - bitmap->lock_h;
ALLEGRO_DISPLAY *old_disp = NULL;
ALLEGRO_DISPLAY *disp;
int orig_format;
bool biased_alpha = false;
GLenum e;
disp = al_get_current_display();
orig_format = _al_get_real_pixel_format(disp, _al_get_bitmap_memory_format(bitmap));
/* Change OpenGL context if necessary. */
if (!disp ||
(_al_get_bitmap_display(bitmap)->ogl_extras->is_shared == false &&
_al_get_bitmap_display(bitmap) != disp))
{
old_disp = disp;
_al_set_current_display_only(_al_get_bitmap_display(bitmap));
}
/* Keep this in sync with ogl_lock_region. */
glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
{
const int lock_pixel_size = al_get_pixel_size(lock_format);
const int pixel_alignment = ogl_pixel_alignment(lock_pixel_size);
glPixelStorei(GL_UNPACK_ALIGNMENT, pixel_alignment);
e = glGetError();
if (e) {
ALLEGRO_ERROR("glPixelStorei(GL_UNPACK_ALIGNMENT, %d) failed (%s).\n",
pixel_alignment, _al_gl_error_string(e));
}
}
if (exactly_15bpp(lock_format)) {
/* OpenGL does not support 15-bpp internal format without an alpha,
* so when storing such data we must ensure the alpha bit is set.
*/
glPixelTransferi(GL_ALPHA_BIAS, 1);
biased_alpha = true;
}
if (ogl_bitmap->is_backbuffer) {
ALLEGRO_DEBUG("Unlocking backbuffer\n");
ogl_unlock_region_backbuffer(bitmap, ogl_bitmap, gl_y);
}
else {
glBindTexture(GL_TEXTURE_2D, ogl_bitmap->texture);
if (ogl_bitmap->fbo_info) {
ALLEGRO_DEBUG("Unlocking non-backbuffer (FBO)\n");
ogl_unlock_region_nonbb_fbo(bitmap, ogl_bitmap, gl_y, orig_format);
}
else {
ALLEGRO_DEBUG("Unlocking non-backbuffer (non-FBO)\n");
ogl_unlock_region_nonbb_nonfbo(bitmap, ogl_bitmap, gl_y);
}
/* If using FBOs, we need to regenerate mipmaps explicitly now. */
/* XXX why don't we check ogl_bitmap->fbo_info? */
if ((al_get_bitmap_flags(bitmap) & ALLEGRO_MIPMAP) &&
al_get_opengl_extension_list()->ALLEGRO_GL_EXT_framebuffer_object)
{
glGenerateMipmapEXT(GL_TEXTURE_2D);
e = glGetError();
if (e) {
ALLEGRO_ERROR("glGenerateMipmapEXT for texture %d failed (%s).\n",
ogl_bitmap->texture, _al_gl_error_string(e));
}
}
}
if (biased_alpha) {
glPixelTransferi(GL_ALPHA_BIAS, 0);
}
glPopClientAttrib();
if (old_disp) {
_al_set_current_display_only(old_disp);
}
}
ALLEGRO_LOCKED_REGION *_al_ogl_lock_region_new(ALLEGRO_BITMAP *bitmap,
int x, int y, int w, int h, int format, int flags)
{
ALLEGRO_BITMAP_EXTRA_OPENGL * const ogl_bitmap = bitmap->extra;
const GLint gl_y = bitmap->h - y - h;
ALLEGRO_DISPLAY *disp;
ALLEGRO_DISPLAY *old_disp = NULL;
GLenum e;
if (format == ALLEGRO_PIXEL_FORMAT_ANY) {
format = bitmap->format;
}
disp = al_get_current_display();
format = _al_get_real_pixel_format(disp, format);
/* Change OpenGL context if necessary. */
if (!disp ||
(bitmap->display->ogl_extras->is_shared == false &&
bitmap->display != disp))
{
old_disp = disp;
_al_set_current_display_only(bitmap->display);
}
/* Set up the pixel store state. We will need to match it when unlocking.
* There may be other pixel store state we should be setting.
* See also pitfalls 7 & 8 from:
* http://www.opengl.org/resources/features/KilgardTechniques/oglpitfall/
*/
glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
{
const int pixel_size = al_get_pixel_size(format);
const int pixel_alignment = ogl_pixel_alignment(pixel_size);
glPixelStorei(GL_PACK_ALIGNMENT, pixel_alignment);
e = glGetError();
if (e) {
ALLEGRO_ERROR("glPixelStorei(GL_PACK_ALIGNMENT, %d) failed (%s).\n",
pixel_alignment, _al_gl_error_string(e));
}
}
if (ogl_bitmap->is_backbuffer) {
ALLEGRO_DEBUG("Locking backbuffer\n");
ogl_lock_region_backbuffer(bitmap, ogl_bitmap,
x, gl_y, w, h, format, flags);
}
else if (flags & ALLEGRO_LOCK_WRITEONLY) {
ALLEGRO_DEBUG("Locking non-backbuffer WRITEONLY\n");
ogl_lock_region_nonbb_writeonly(bitmap, ogl_bitmap,
x, gl_y, w, h, format);
}
else {
ALLEGRO_DEBUG("Locking non-backbuffer READWRITE\n");
ogl_lock_region_nonbb_readwrite(bitmap, ogl_bitmap,
x, gl_y, w, h, format);
}
glPopClientAttrib();
if (old_disp != NULL) {
_al_set_current_display_only(old_disp);
}
return &bitmap->locked_region;
}
/* Function: al_create_display
*/
ALLEGRO_DISPLAY *al_create_display(int w, int h)
{
ALLEGRO_SYSTEM *system;
ALLEGRO_DISPLAY_INTERFACE *driver;
ALLEGRO_DISPLAY *display;
ALLEGRO_EXTRA_DISPLAY_SETTINGS *settings;
int flags;
system = al_get_system_driver();
driver = system->vt->get_display_driver();
if (!driver) {
ALLEGRO_ERROR("Failed to create display (no display driver)\n");
return NULL;
}
display = driver->create_display(w, h);
if (!display) {
ALLEGRO_ERROR("Failed to create display (NULL)\n");
return NULL;
}
ASSERT(display->vt);
settings = &display->extra_settings;
flags = settings->required | settings->suggested;
if (!(flags & (1 << ALLEGRO_AUTO_CONVERT_BITMAPS))) {
settings->settings[ALLEGRO_AUTO_CONVERT_BITMAPS] = 1;
}
display->min_w = 0;
display->min_h = 0;
display->max_w = 0;
display->max_h = 0;
display->use_constraints = false;
display->vertex_cache = 0;
display->num_cache_vertices = 0;
display->cache_enabled = false;
display->vertex_cache_size = 0;
display->cache_texture = 0;
al_identity_transform(&display->projview_transform);
display->default_shader = NULL;
_al_vector_init(&display->display_invalidated_callbacks, sizeof(void *));
_al_vector_init(&display->display_validated_callbacks, sizeof(void *));
display->render_state.write_mask = ALLEGRO_MASK_RGBA | ALLEGRO_MASK_DEPTH;
display->render_state.depth_test = false;
display->render_state.depth_function = ALLEGRO_RENDER_LESS;
display->render_state.alpha_test = false;
display->render_state.alpha_function = ALLEGRO_RENDER_ALWAYS;
display->render_state.alpha_test_value = 0;
_al_vector_init(&display->bitmaps, sizeof(ALLEGRO_BITMAP*));
if (settings->settings[ALLEGRO_COMPATIBLE_DISPLAY]) {
al_set_target_bitmap(al_get_backbuffer(display));
}
else {
ALLEGRO_DEBUG("ALLEGRO_COMPATIBLE_DISPLAY not set\n");
_al_set_current_display_only(display);
}
if (display->flags & ALLEGRO_PROGRAMMABLE_PIPELINE) {
display->default_shader = _al_create_default_shader(display->flags);
if (!display->default_shader) {
al_destroy_display(display);
return NULL;
}
al_use_shader(display->default_shader);
}
/* Clear the screen */
if (settings->settings[ALLEGRO_COMPATIBLE_DISPLAY]) {
al_clear_to_color(al_map_rgb(0, 0, 0));
/* TODO:
* on iphone, don't kill the initial splashscreen - in fact, it's also
* annoying in linux to have an extra black frame as first frame and I
* suppose we never really want it
*/
#if 0
al_flip_display();
#endif
}
if (settings->settings[ALLEGRO_AUTO_CONVERT_BITMAPS]) {
/* We convert video bitmaps to memory bitmaps when the display is
* destroyed, so seems only fair to re-convertt hem when the
* display is re-created again.
*/
al_convert_memory_bitmaps();
}
return display;
}
