BOOL update_process_glyph_fragments(rdpContext* context, BYTE* data, UINT32 length,
UINT32 cacheId, UINT32 ulCharInc, UINT32 flAccel, UINT32 bgcolor, UINT32 fgcolor, int x, int y,
int bkX, int bkY, int bkWidth, int bkHeight, int opX, int opY, int opWidth, int opHeight, BOOL fOpRedundant)
{
int n;
UINT32 id;
UINT32 size;
int index = 0;
BYTE* fragments;
rdpGraphics* graphics;
rdpGlyphCache* glyph_cache;
graphics = context->graphics;
glyph_cache = context->cache->glyph;
if (opX + opWidth > context->settings->DesktopWidth)
{
/**
* Some Microsoft servers send erroneous high values close to the
* sint16 maximum in the OpRight field of the GlyphIndex, FastIndex and
* FastGlyph drawing orders, probably a result of applications trying to
* clear the text line to the very right end.
* One example where this can be seen is typing in notepad.exe within
* a RDP session to Windows XP Professional SP3.
* This workaround prevents resulting problems in the UI callbacks.
*/
opWidth = context->settings->DesktopWidth - opX;
}
if (opWidth > 0 && opHeight > 0)
{
if (!Glyph_BeginDraw(context, opX, opY, opWidth, opHeight, bgcolor, fgcolor, fOpRedundant))
return FALSE;
}
else
{
if (fOpRedundant)
{
if (!Glyph_BeginDraw(context, bkX, bkY, bkWidth, bkHeight, bgcolor, fgcolor, fOpRedundant))
return FALSE;
}
else
{
if (!Glyph_BeginDraw(context, 0, 0, 0, 0, bgcolor, fgcolor, fOpRedundant))
return FALSE;
}
}
while (index < (int) length)
{
switch (data[index])
{
case GLYPH_FRAGMENT_USE:
if (index + 2 > (int) length)
{
/* at least one byte need to follow */
index = length = 0;
break;
}
id = data[index + 1];
fragments = (BYTE*) glyph_cache_fragment_get(glyph_cache, id, &size);
if (fragments != NULL)
{
for (n = 0; n < (int) size; n++)
{
update_process_glyph(context, fragments, &n, &x, &y, cacheId, ulCharInc, flAccel);
}
/* Contrary to glyphs, the offset is added after the fragment. */
if ((ulCharInc == 0) && (!(flAccel & SO_CHAR_INC_EQUAL_BM_BASE)))
{
if (flAccel & SO_VERTICAL)
y += data[index + 2];
else
x += data[index + 2];
}
}
index += (index + 2 < (int) length) ? 3 : 2;
length -= index;
data = &(data[index]);
index = 0;
break;
case GLYPH_FRAGMENT_ADD:
if (index + 3 > (int) length)
{
/* at least two bytes need to follow */
index = length = 0;
break;
}
id = data[index + 1];
size = data[index + 2];
fragments = (BYTE*) malloc(size);
if (!fragments)
return FALSE;
CopyMemory(fragments, data, size);
glyph_cache_fragment_put(glyph_cache, id, size, fragments);
index += 3;
length -= index;
data = &(data[index]);
index = 0;
break;
default:
update_process_glyph(context, data, &index, &x, &y, cacheId, ulCharInc, flAccel);
index++;
break;
}
}
if (opWidth > 0 && opHeight > 0)
return Glyph_EndDraw(context, opX, opY, opWidth, opHeight, bgcolor, fgcolor);
return Glyph_EndDraw(context, bkX, bkY, bkWidth, bkHeight, bgcolor, fgcolor);
}
void update_process_glyph_fragments(rdpContext* context, BYTE* data, UINT32 length,
UINT32 cacheId, UINT32 ulCharInc, UINT32 flAccel, UINT32 bgcolor, UINT32 fgcolor, int x, int y,
int bkX, int bkY, int bkWidth, int bkHeight, int opX, int opY, int opWidth, int opHeight)
{
int n;
UINT32 id;
UINT32 size;
int index = 0;
BYTE* fragments;
rdpGraphics* graphics;
rdpGlyphCache* glyph_cache;
graphics = context->graphics;
glyph_cache = context->cache->glyph;
if (opWidth > 0 && opHeight > 0)
Glyph_BeginDraw(context, opX, opY, opWidth, opHeight, bgcolor, fgcolor);
else
Glyph_BeginDraw(context, 0, 0, 0, 0, bgcolor, fgcolor);
while (index < (int) length)
{
switch (data[index])
{
case GLYPH_FRAGMENT_USE:
if (index + 2 > (int) length)
{
/* at least one byte need to follow */
index = length = 0;
break;
}
id = data[index + 1];
fragments = (BYTE*) glyph_cache_fragment_get(glyph_cache, id, &size);
if (fragments != NULL)
{
if ((ulCharInc == 0) && (!(flAccel & SO_CHAR_INC_EQUAL_BM_BASE)))
{
if (flAccel & SO_VERTICAL)
y += data[index + 2];
else
x += data[index + 2];
}
for (n = 0; n < (int) size; n++)
{
update_process_glyph(context, fragments, &n, &x, &y, cacheId, ulCharInc, flAccel);
}
}
index += (index + 2 < (int) length) ? 3 : 2;
length -= index;
data = &(data[index]);
index = 0;
break;
case GLYPH_FRAGMENT_ADD:
if (index + 3 > (int) length)
{
/* at least two bytes need to follow */
index = length = 0;
break;
}
id = data[index + 1];
size = data[index + 2];
fragments = (BYTE*) malloc(size);
memcpy(fragments, data, size);
glyph_cache_fragment_put(glyph_cache, id, size, fragments);
index += 3;
length -= index;
data = &(data[index]);
index = 0;
break;
default:
update_process_glyph(context, data, &index, &x, &y, cacheId, ulCharInc, flAccel);
index++;
break;
}
}
if (opWidth > 0 && opHeight > 0)
Glyph_EndDraw(context, opX, opY, opWidth, opHeight, bgcolor, fgcolor);
else
Glyph_EndDraw(context, bkX, bkY, bkWidth, bkHeight, bgcolor, fgcolor);
}
