static ALLEGRO_FBO_INFO *ogl_new_fbo(ALLEGRO_DISPLAY *display)
{
ALLEGRO_FBO_INFO *info;
GLint e;
info = ogl_find_unused_fbo(display);
ASSERT(info->fbo_state != FBO_INFO_PERSISTENT);
if (info->fbo_state == FBO_INFO_TRANSIENT) {
ALLEGRO_BITMAP_EXTRA_OPENGL *extra = info->owner->extra;
extra->fbo_info = NULL;
ALLEGRO_DEBUG("Deleting FBO: %u\n", info->fbo);
if (ANDROID_PROGRAMMABLE_PIPELINE(al_get_current_display())) {
glDeleteFramebuffers(1, &info->fbo);
}
else {
glDeleteFramebuffersEXT(1, &info->fbo);
}
_al_ogl_reset_fbo_info(info);
}
else {
/* FBO_INFO_UNUSED */
}
if (ANDROID_PROGRAMMABLE_PIPELINE(al_get_current_display())) {
glGenFramebuffers(1, &info->fbo);
}
else {
glGenFramebuffersEXT(1, &info->fbo);
}
e = glGetError();
if (e) {
ALLEGRO_ERROR("glGenFramebuffersEXT failed\n");
_al_ogl_reset_fbo_info(info);
return NULL;
}
ALLEGRO_DEBUG("Created FBO: %u\n", info->fbo);
return info;
}
static void use_fbo_for_bitmap(ALLEGRO_DISPLAY *display,
ALLEGRO_BITMAP *bitmap, ALLEGRO_FBO_INFO *info)
{
ALLEGRO_BITMAP_EXTRA_OPENGL *ogl_bitmap = bitmap->extra;
GLint e;
if (info->fbo_state == FBO_INFO_UNUSED)
info->fbo_state = FBO_INFO_TRANSIENT;
info->owner = bitmap;
info->last_use_time = al_get_time();
ogl_bitmap->fbo_info = info;
/* Bind to the FBO. */
_al_ogl_bind_framebuffer(info->fbo);
/* Attach the texture. */
if (ANDROID_PROGRAMMABLE_PIPELINE(al_get_current_display())) {
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, ogl_bitmap->texture, 0);
}
else {
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, ogl_bitmap->texture, 0);
}
e = glGetError();
if (e) {
ALLEGRO_DEBUG("glFrameBufferTexture2DEXT failed! fbo=%d texture=%d (%s)",
info->fbo, ogl_bitmap->texture, _al_gl_error_string(e));
}
/* See comment about unimplemented functions on Android above */
if (UNLESS_ANDROID_OR_RPI(
glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT) != GL_FRAMEBUFFER_COMPLETE_EXT))
{
/* For some reason, we cannot use the FBO with this
* texture. So no reason to keep re-trying, output a log
* message and switch to (extremely slow) software mode.
*/
ALLEGRO_ERROR("Could not use FBO for bitmap with format %s.\n",
_al_pixel_format_name(al_get_bitmap_format(bitmap)));
ALLEGRO_ERROR("*** SWITCHING TO SOFTWARE MODE ***\n");
_al_ogl_bind_framebuffer(0);
glDeleteFramebuffersEXT(1, &info->fbo);
_al_ogl_reset_fbo_info(info);
ogl_bitmap->fbo_info = NULL;
}
else {
display->ogl_extras->opengl_target = bitmap;
}
}
ALLEGRO_FBO_INFO *_al_ogl_persist_fbo(ALLEGRO_DISPLAY *display,
ALLEGRO_FBO_INFO *transient_fbo_info)
{
ALLEGRO_OGL_EXTRAS *extras = display->ogl_extras;
int i;
ASSERT(transient_fbo_info->fbo_state == FBO_INFO_TRANSIENT);
for (i = 0; i < ALLEGRO_MAX_OPENGL_FBOS; i++) {
if (transient_fbo_info == &extras->fbos[i]) {
ALLEGRO_FBO_INFO *new_info = al_malloc(sizeof(ALLEGRO_FBO_INFO));
*new_info = *transient_fbo_info;
new_info->fbo_state = FBO_INFO_PERSISTENT;
_al_ogl_reset_fbo_info(transient_fbo_info);
ALLEGRO_DEBUG("Persistent FBO: %u\n", new_info->fbo);
return new_info;
}
}
ALLEGRO_ERROR("Could not find FBO %u in pool\n", transient_fbo_info->fbo);
return transient_fbo_info;
}
static void setup_fbo(ALLEGRO_DISPLAY *display, ALLEGRO_BITMAP *bitmap)
{
ALLEGRO_BITMAP_OGL *ogl_bitmap;
if (bitmap->parent)
bitmap = bitmap->parent;
ogl_bitmap = (void *)bitmap;
/* We can't return here. Target's FBO can be taken away by locking
* a lot of bitmaps consecutively.
* Also affects ex_multiwin; resizing one window affects the other.
*/
if (false && display->ogl_extras->opengl_target == ogl_bitmap)
return;
#if !defined ALLEGRO_GP2XWIZ
if (!ogl_bitmap->is_backbuffer) {
ALLEGRO_FBO_INFO *info = NULL;
/* When a bitmap is set as target bitmap, we try to create an FBO for it.
*/
if (ogl_bitmap->fbo_info == NULL && !(bitmap->flags & ALLEGRO_FORCE_LOCKING)) {
#ifdef ALLEGRO_IPHONE
/* FIXME This is quite a hack but I don't know how the Allegro extension
* manager works to fix this properly (getting extensions properly reported
* on iphone.
*/
if (true)
#else
if (al_get_opengl_extension_list()->ALLEGRO_GL_EXT_framebuffer_object ||
al_get_opengl_extension_list()->ALLEGRO_GL_OES_framebuffer_object)
#endif
{
info = ogl_find_unused_fbo(display);
ASSERT(info->fbo_state != FBO_INFO_PERSISTENT);
if (info->fbo_state == FBO_INFO_TRANSIENT) {
info->owner->fbo_info = NULL;
ALLEGRO_DEBUG("Deleting FBO: %u\n", info->fbo);
glDeleteFramebuffersEXT(1, &info->fbo);
_al_ogl_reset_fbo_info(info);
}
glGenFramebuffersEXT(1, &info->fbo);
ALLEGRO_DEBUG("Created FBO: %u\n", info->fbo);
}
}
else {
info = ogl_bitmap->fbo_info;
}
if (info && info->fbo) {
/* Bind to the FBO. */
#ifndef ALLEGRO_IPHONE
ASSERT(display->ogl_extras->extension_list->ALLEGRO_GL_EXT_framebuffer_object ||
display->ogl_extras->extension_list->ALLEGRO_GL_OES_framebuffer_object);
#endif
if (info->fbo_state == FBO_INFO_UNUSED)
info->fbo_state = FBO_INFO_TRANSIENT;
info->owner = ogl_bitmap;
info->last_use_time = al_get_time();
ogl_bitmap->fbo_info = info;
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, info->fbo);
/* Attach the texture. */
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, ogl_bitmap->texture, 0);
if (glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT) !=
GL_FRAMEBUFFER_COMPLETE_EXT) {
/* For some reason, we cannot use the FBO with this
* texture. So no reason to keep re-trying, output a log
* message and switch to (extremely slow) software mode.
*/
ALLEGRO_ERROR("Could not use FBO for bitmap with format %s.\n",
_al_pixel_format_name(bitmap->format));
ALLEGRO_ERROR("*** SWITCHING TO SOFTWARE MODE ***\n");
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
glDeleteFramebuffersEXT(1, &info->fbo);
_al_ogl_reset_fbo_info(info);
ogl_bitmap->fbo_info = NULL;
}
else {
display->ogl_extras->opengl_target = ogl_bitmap;
glViewport(0, 0, bitmap->w, bitmap->h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, bitmap->w, bitmap->h, 0, -1, 1);
}
}
}
else {
display->ogl_extras->opengl_target = ogl_bitmap;
// TODO: Might as well have a vtable entry here
#ifdef ALLEGRO_IPHONE
_al_iphone_setup_opengl_view(display);
#else
if (display->ogl_extras->extension_list->ALLEGRO_GL_EXT_framebuffer_object ||
display->ogl_extras->extension_list->ALLEGRO_GL_OES_framebuffer_object) {
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
}
glViewport(0, 0, display->w, display->h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
/* We use upside down coordinates compared to OpenGL, so the bottommost
* coordinate is display->h not 0.
*/
glOrtho(0, display->w, display->h, 0, -1, 1);
#endif
}
#else
ALLEGRO_DISPLAY_GP2XWIZ_OGL *wiz_disp = (ALLEGRO_DISPLAY_GP2XWIZ_OGL *)display;
display->ogl_extras->opengl_target = ogl_bitmap;
if (!ogl_bitmap->is_backbuffer) {
/* FIXME: implement */
}
else {
eglMakeCurrent(wiz_disp->egl_display, wiz_disp->egl_surface, wiz_disp->egl_surface, wiz_disp->egl_context);
glViewport(0, 0, display->w, display->h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
/* We use upside down coordinates compared to OpenGL, so the bottommost
* coordinate is display->h not 0.
*/
glOrtho(0, display->w, display->h, 0, -1, 1);
}
#endif
}
