DFBResult
dfb_font_get_glyph_data( CoreFont *font,
unichar glyph,
CoreGlyphData **ret_data )
{
DFBResult ret;
CoreGlyphData *data;
D_MAGIC_ASSERT( font, CoreFont );
D_ASSERT( ret_data != NULL );
if ((data = direct_tree_lookup (font->glyph_infos, (void *)glyph)) != NULL) {
*ret_data = data;
return DFB_OK;
}
data = (CoreGlyphData *) D_CALLOC(1, sizeof (CoreGlyphData));
if (!data)
return DFB_NOSYSTEMMEMORY;
if (font->GetGlyphInfo &&
font->GetGlyphInfo (font, glyph, data) == DFB_OK &&
data->width > 0 && data->height > 0)
{
if (font->next_x + data->width > font->row_width) {
CoreSurface *surface;
if (font->row_width == 0) {
int width = 8192 / font->height;
if (width > 2048)
width = 2048;
if (width < font->maxadvance)
width = font->maxadvance;
font->row_width = (width + 7) & ~7;
}
ret = dfb_surface_create( font->core,
font->row_width,
MAX( font->height + 1, 8 ),
font->pixel_format,
CSP_VIDEOLOW, DSCAPS_NONE, NULL,
&surface );
if (ret) {
D_ERROR( "DirectFB/core/fonts: "
"Could not create glyph surface! (%s)\n",
DirectFBErrorString( ret ) );
D_FREE( data );
return ret;
}
font->next_x = 0;
font->rows++;
font->surfaces = D_REALLOC( font->surfaces, sizeof(void *) * font->rows );
font->surfaces[font->rows - 1] = surface;
}
if (font->RenderGlyph(font, glyph, data,
font->surfaces[font->rows - 1]) == DFB_OK)
{
int align = DFB_PIXELFORMAT_ALIGNMENT(font->pixel_format);
data->surface = font->surfaces[font->rows - 1];
data->start = font->next_x;
font->next_x += (data->width + align) & ~align;
dfb_gfxcard_flush_texture_cache();
}
else {
data->start = data->width = data->height = 0;
}
}
else {
data->start = data->width = data->height = 0;
}
direct_tree_insert (font->glyph_infos, (void *) glyph, data);
*ret_data = data;
return DFB_OK;
}
static void
manage_interlocks( CoreSurfaceAllocation *allocation,
CoreSurfaceAccessorID accessor,
CoreSurfaceAccessFlags access )
{
int locks;
locks = dfb_surface_allocation_locks( allocation );
#if 1
/*
* Manage access interlocks.
*
* SOON FIXME: Clearing flags only when not locked yet. Otherwise nested GPU/CPU locks are a problem.
*/
/* Software read/write access... */
if (accessor == CSAID_CPU) {
/* If hardware has written or is writing... */
if (allocation->accessed[CSAID_GPU] & CSAF_WRITE) {
/* ...wait for the operation to finish. */
dfb_gfxcard_sync(); /* TODO: wait for serial instead */
/* Software read access after hardware write requires flush of the (bus) read cache. */
dfb_gfxcard_flush_read_cache();
if (!locks) {
/* ...clear hardware write access. */
allocation->accessed[CSAID_GPU] = (CoreSurfaceAccessFlags)(allocation->accessed[CSAID_GPU] & ~CSAF_WRITE);
/* ...clear hardware read access (to avoid syncing twice). */
allocation->accessed[CSAID_GPU] = (CoreSurfaceAccessFlags)(allocation->accessed[CSAID_GPU] & ~CSAF_READ);
}
}
/* Software write access... */
if (access & CSAF_WRITE) {
/* ...if hardware has (to) read... */
if (allocation->accessed[CSAID_GPU] & CSAF_READ) {
/* ...wait for the operation to finish. */
dfb_gfxcard_sync(); /* TODO: wait for serial instead */
/* ...clear hardware read access. */
if (!locks)
allocation->accessed[CSAID_GPU] = (CoreSurfaceAccessFlags)(allocation->accessed[CSAID_GPU] & ~CSAF_READ);
}
}
}
/* Hardware read access... */
if (accessor == CSAID_GPU && access & CSAF_READ) {
/* ...if software has written before... */
if (allocation->accessed[CSAID_CPU] & CSAF_WRITE) {
/* ...flush texture cache. */
dfb_gfxcard_flush_texture_cache();
/* ...clear software write access. */
if (!locks)
allocation->accessed[CSAID_CPU] = (CoreSurfaceAccessFlags)(allocation->accessed[CSAID_CPU] & ~CSAF_WRITE);
}
}
if (! D_FLAGS_ARE_SET( allocation->accessed[accessor], access )) {
/* FIXME: surface_enter */
}
#endif
/* Collect... */
allocation->accessed[accessor] = (CoreSurfaceAccessFlags)(allocation->accessed[accessor] | access);
}
