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VNC: Add support for RGB8 conversions. These are what are used by RealVNC.

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This commit is contained in:
Gregory Nutt
2016-04-19 10:10:59 -06:00
parent fc809d5df0
commit 170f906a8b
3 changed files with 250 additions and 67 deletions
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graphics/vnc/server/vnc_updater.c
+176 -10
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@@ -58,9 +58,11 @@
/* Color conversion functions */
#if defined(CONFIG_VNCSERVER_COLORFMT_RGB16)
typedef CODE uint8_t(*vnc_convert8_t)(uint16_t rgb);
typedef CODE uint16_t(*vnc_convert16_t)(uint16_t rgb);
typedef CODE uint32_t(*vnc_convert32_t)(uint16_t rgb);
#elif defined(CONFIG_VNCSERVER_COLORFMT_RGB32)
typedef CODE uint8_t(*vnc_convert8_t)(uint32_t rgb);
typedef CODE uint16_t(*vnc_convert16_t)(uint32_t rgb);
typedef CODE uint32_t(*vnc_convert32_t)(uint32_t rgb);
#else
@@ -244,6 +246,34 @@ static void vnc_add_queue(FAR struct vnc_session_s *session,
#if defined(CONFIG_VNCSERVER_COLORFMT_RGB16)
uint8_t vnc_convert_rgb8_222(uint16_t rgb)
{
/* 111111
* 54321098 76543210
* -----------------
* RRRRRGGG GGGBBBBB
* ..RRGGBB
*/
return (uint8_t)(((rgb >> 10) & 0x0030) |
((rgb >> 7) & 0x000c) |
((rgb >> 3) & 0x0003));
}
uint8_t vnc_convert_rgb8_332(uint16_t rgb)
{
/* 111111
* 54321098 76543210
* -----------------
* RRRRRGGG GGGBBBBB
* RRRGGGBB
*/
return (uint8_t)(((rgb >> 8) & 0x0070) |
((rgb >> 6) & 0x001c) |
((rgb >> 3) & 0x0003));
}
uint16_t vnc_convert_rgb16_555(uint16_t rgb)
{
/* 111111
@@ -278,12 +308,40 @@ uint32_t vnc_convert_rgb32_888(uint16_t rgb)
}
#elif defined(CONFIG_VNCSERVER_COLORFMT_RGB32)
uint8_t vnc_convert_rgb8_222(uint16_t rgb)
{
/* 33222222 22221111 111111
* 10987654 32109876 54321098 76543210
* -----------------------------------
* RRRRRRRR GGGGGGGG BBBBBBBB
* ..RRGGBB
*/
return (uint8_t)(((rgb >> 18) & 0x0030) |
((rgb >> 12) & 0x000c) |
(rgb >> 6) & 0x0003));
}
uint8_t vnc_convert_rgb8_332(uint16_t rgb)
{
/* 33222222 22221111 111111
* 10987654 32109876 54321098 76543210
* -----------------------------------
* RRRRRRRR GGGGGGGG BBBBBBBB
* RRRGGGBB
*/
return (uint8_t)(((rgb >> 16) & 0x0070) |
((rgb >> 11) & 0x001c) |
(rgb >> 6) & 0x0003));
}
uint16_t vnc_convert_rgb16_555(uint32_t rgb)
{
/* 33222222 22221111 111111
* 10987654 32109876 54321098 76543210
* ----------------------------------
* RRRRR... GGGGG... BBBBB...
* -----------------------------------
* RRRRRRRR GGGGGGGG BBBBBBBB
* .RRRRRGG GGGBBBBB
*/
@@ -297,8 +355,8 @@ uint16_t vnc_convert_rgb16_565(uint32_t rgb)
{
/* 33222222 22221111 111111
* 10987654 32109876 54321098 76543210
* ----------------------------------
* RRRRR... GGGGGG.. BBBBB...
* -----------------------------------
* RRRRRRRR GGGGGGGG BBBBBBBB
* RRRRRGGG GGGBBBBB
*/
@@ -318,6 +376,96 @@ uint32_t vnc_convert_rgb32_888(uint32_t rgb)
# error Unspecified/unsupported color format
#endif
/****************************************************************************
* Name: vnc_copy8
*
* Description:
* Copy a 16/32-bit pixels from the source rectangle to a 8-bit pixel
* destination rectangle.
*
* Input Parameters:
* session - A reference to the VNC session structure.
* row,col - The upper left X/Y (pixel/row) position of the rectangle
* width,height - The width (pixels) and height (rows of the rectangle)
* convert - The function to use to convert from the local framebuffer
* color format to the remote framebuffer color format.
*
* Returned Value:
* The size of the transfer in bytes.
*
****************************************************************************/
static size_t vnc_copy8(FAR struct vnc_session_s *session,
nxgl_coord_t row, nxgl_coord_t col,
nxgl_coord_t height, nxgl_coord_t width,
vnc_convert8_t convert)
{
#if defined(CONFIG_VNCSERVER_COLORFMT_RGB16)
FAR struct rfb_framebufferupdate_s *update;
FAR const uint16_t *srcleft;
FAR const uint16_t *src;
FAR uint8_t *dest;
nxgl_coord_t x;
nxgl_coord_t y;
/* Destination rectangle start address */
update = (FAR struct rfb_framebufferupdate_s *)session->outbuf;
dest = (FAR uint8_t *)update->rect[0].data;
/* Source rectangle start address (left/top)*/
srcleft = (FAR uint16_t *)(session->fb + RFB_STRIDE * row + RFB_BYTESPERPIXEL * col);
/* Transfer each row from the source buffer into the update buffer */
for (y = 0; y < height; y++)
{
src = srcleft;
for (x = 0; x < width; x++)
{
*dest++ = convert(*src);
src++;
}
srcleft = (FAR uint16_t *)((uintptr_t)srcleft + RFB_STRIDE);
}
return (size_t)((uintptr_t)dest - (uintptr_t)update->rect[0].data);
#elif defined(CONFIG_VNCSERVER_COLORFMT_RGB32)
FAR struct rfb_framebufferupdate_s *update;
FAR const uint32_t *srcleft;
FAR const uint32_t *src;
FAR uint8_t *dest;
nxgl_coord_t x;
nxgl_coord_t y;
/* Destination rectangle start address */
update = (FAR struct rfb_framebufferupdate_s *)session->outbuf;
dest = (FAR uint8_t *)update->rect[0].data;
/* Source rectangle start address */
srcleft = (FAR uint32_t *)(session->fb + RFB_STRIDE * row + RFB_BYTESPERPIXEL * col);
for (y = 0; y < height; y++)
{
src = srcleft;
for (x = 0; x < width; x++)
{
*dest++ = convert(*src);
src++;
}
srcleft = (FAR uint32_t *)((uintptr_t)srcleft + RFB_STRIDE);
}
return (size_t)((uintptr_t)dest - (uintptr_t)update->rect[0].data);
#endif
}
/****************************************************************************
* Name: vnc_copy16
*
@@ -539,10 +687,11 @@ static FAR void *vnc_updater(FAR void *arg)
union
{
vnc_convert8_t bpp8;
vnc_convert16_t bpp16;
vnc_convert32_t bpp32;
} convert;
bool color32 = false;
uint8_t bpp;
DEBUGASSERT(session != NULL);
gvdbg("Updater running for Display %d\n", session->display);
@@ -559,17 +708,29 @@ static FAR void *vnc_updater(FAR void *arg)
switch (session->colorfmt)
{
case FB_FMT_RGB8_222:
convert.bpp8 = vnc_convert_rgb8_222;
bpp = 8;
break;
case FB_FMT_RGB8_332:
convert.bpp8 = vnc_convert_rgb8_332;
bpp = 8;
break;
case FB_FMT_RGB16_555:
convert.bpp16 = vnc_convert_rgb16_555;
bpp = 16;
break;
case FB_FMT_RGB16_565:
convert.bpp16 = vnc_convert_rgb16_565;
bpp = 16;
break;
case FB_FMT_RGB32:
convert.bpp32 = vnc_convert_rgb32_888;
color32 = true;
bpp = 32;
break;
default:
@@ -672,16 +833,21 @@ static FAR void *vnc_updater(FAR void *arg)
* performing the necessary color conversions.
*/
if (color32)
if (bpp == 8)
{
size = vnc_copy32(session, y, x, updheight, updwidth,
convert.bpp32);
size = vnc_copy8(session, y, x, updheight, updwidth,
convert.bpp8);
}
else
else if (bpp == 16)
{
size = vnc_copy16(session, y, x, updheight, updwidth,
convert.bpp16);
}
else
{
size = vnc_copy32(session, y, x, updheight, updwidth,
convert.bpp32);
}
/* Format the FramebufferUpdate message */