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VNC: server is code complete
This commit is contained in:
Gregory Nutt
parent
48d4a9672a
commit
f5f461da20
2 changed files with 383 additions and 58 deletions
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@ -102,7 +102,7 @@
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# define RFB_GSHIFT 8
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# define RFB_BSHIFT 0
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#else
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# error Unspecified color format
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# error Unspecified/unsupported color format
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#endif
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#ifndef CONFIG_VNCSERVER_SCREENWIDTH
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@ -179,7 +179,8 @@ enum vnc_server_e
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VNCSERVER_CONNECTED, /* Connect to a client, but not yet configured */
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VNCSERVER_CONFIGURED, /* Configured and ready to transfer graphics */
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VNCSERVER_RUNNING, /* Running and activly transferring graphics */
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VNCSERVER_STOPPING /* The server has been asked to stop */
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VNCSERVER_STOPPING, /* The updater has been asked to stop */
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VNCSERVER_STOPPED /* The updater has stopped */
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};
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/* This structure is used to queue FrameBufferUpdate event. It includes a
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@ -383,35 +384,6 @@ void vnc_key_map(FAR struct vnc_session_s *session, uint16_t keysym,
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FAR struct vnc_session_s *vnc_find_session(int display);
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/****************************************************************************
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* Name: vnc_convert_rgbNN
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*
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* Description:
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* Convert the native framebuffer color format (either RGB16 5:6:5 or RGB32
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* 8:8:8) to the remote framebuffer color format (either RGB16 5:6:5,
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* RGB16 5:5:5, or RGB32 8:8:)
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*
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* Input Parameters:
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* pixel - The src color in local framebuffer format.
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*
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* Returned Value:
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* The pixel in the remote framebuffer color format.
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*
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****************************************************************************/
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#if defined(CONFIG_VNCSERVER_COLORFMT_RGB16)
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uint16_t vnc_convert_rgb16_555(uint16_t rgb);
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uint16_t vnc_convert_rgb16_565(uint16_t rgb);
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uint32_t vnc_convert_rgb32_888(uint16_t rgb);
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#elif defined(CONFIG_VNCSERVER_COLORFMT_RGB32)
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uint16_t vnc_convert_rgb16_555(uint32_t rgb);
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uint16_t vnc_convert_rgb16_565(uint32_t rgb);
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uint32_t vnc_convert_rgb32_888(uint32_t rgb);
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#else
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# error Unspecified color format
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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@ -47,8 +47,26 @@
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#include <assert.h>
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#include <errno.h>
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#include <nuttx/video/rgbcolors.h>
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#include "vnc_server.h"
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* Color conversion functions */
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#if defined(CONFIG_VNCSERVER_COLORFMT_RGB16)
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typedef CODE uint16_t(*vnc_convert16_t)(uint16_t rgb);
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typedef CODE uint32_t(*vnc_convert32_t)(uint16_t rgb);
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#elif defined(CONFIG_VNCSERVER_COLORFMT_RGB32)
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typedef CODE uint16_t(*vnc_convert16_t)(uint32_t rgb);
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typedef CODE uint32_t(*vnc_convert32_t)(uint32_t rgb);
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#else
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# error Unspecified/unsupported color format
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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@ -177,7 +195,8 @@ vnc_remove_queue(FAR struct vnc_session_s *session)
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* Add one rectangle entry to the list of queued rectangles to be updated.
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*
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* Input Parameters:
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* Standard pthread arguments.
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* session - A reference to the VNC session structure.
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* rect - The rectangle to be added to the queue.
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*
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* Returned Value:
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* None
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@ -185,7 +204,7 @@ vnc_remove_queue(FAR struct vnc_session_s *session)
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****************************************************************************/
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static void vnc_add_queue(FAR struct vnc_session_s *session,
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FAR struct vnc_fbupdate_s *rect)
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FAR struct vnc_fbupdate_s *rect)
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{
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/* Lock the scheduler to assure that the sq_addlast() and the sem_post()
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* are atomic.
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@ -207,6 +226,278 @@ static void vnc_add_queue(FAR struct vnc_session_s *session,
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sched_unlock();
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}
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/****************************************************************************
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* Name: vnc_convert_rgbNN
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*
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* Description:
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* Convert the native framebuffer color format (either RGB16 5:6:5 or RGB32
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* 8:8:8) to the remote framebuffer color format (either RGB16 5:6:5,
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* RGB16 5:5:5, or RGB32 8:8:)
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*
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* Input Parameters:
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* pixel - The src color in local framebuffer format.
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*
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* Returned Value:
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* The pixel in the remote framebuffer color format.
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*
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****************************************************************************/
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#if defined(CONFIG_VNCSERVER_COLORFMT_RGB16)
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uint16_t vnc_convert_rgb16_555(uint16_t rgb)
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{
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/* 111111
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* 54321098 76543210
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* -----------------
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* RRRRRGGG GGGBBBBB
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* .RRRRRGG GGGBBBBB
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*/
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return (((rgb >> 1) & ~0x1f) | (rgb & 0x1f));
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}
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uint16_t vnc_convert_rgb16_565(uint16_t rgb)
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{
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/* Identity mapping */
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return rgb;
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}
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uint32_t vnc_convert_rgb32_888(uint16_t rgb)
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{
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/* 33222222 22221111 111111
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* 10987654 32109876 54321098 76543210
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* ----------------------------------
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* RRRRRGGG GGGBBBBB
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* RRRRR... GGGGGG.. BBBBB...
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*/
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return (((uint32_t)rgb << 8) & 0x00f80000) |
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(((uint32_t)rgb << 6) & 0x0000fc00) |
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(((uint32_t)rgb << 3) & 0x000000f8);
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}
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#elif defined(CONFIG_VNCSERVER_COLORFMT_RGB32)
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uint16_t vnc_convert_rgb16_555(uint32_t rgb)
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{
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/* 33222222 22221111 111111
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* 10987654 32109876 54321098 76543210
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* ----------------------------------
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* RRRRR... GGGGG... BBBBB...
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* .RRRRRGG GGGBBBBB
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*/
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return (uint16_t)
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(((rgb >> 9) & 0x00007c00) |
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((rgb >> 6) & 0x000003e0) |
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((rgb >> 3) & 0x0000001f));
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}
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uint16_t vnc_convert_rgb16_565(uint32_t rgb)
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{
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/* 33222222 22221111 111111
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* 10987654 32109876 54321098 76543210
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* ----------------------------------
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* RRRRR... GGGGGG.. BBBBB...
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* RRRRRGGG GGGBBBBB
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*/
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return (uint16_t)
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(((rgb >> 8) & 0x0000f800) |
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((rgb >> 5) & 0x000007e0) |
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((rgb >> 3) & 0x0000001f));
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}
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uint32_t vnc_convert_rgb32_888(uint32_t rgb)
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{
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/* Identity mapping */
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return rgb;
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}
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#else
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# error Unspecified/unsupported color format
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#endif
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/****************************************************************************
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* Name: vnc_copy16
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*
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* Description:
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* Copy a 16/32-bit pixels from the source rectangle to a 16-bit pixel
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* destination rectangle.
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*
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* Input Parameters:
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* session - A reference to the VNC session structure.
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* row,col - The upper left X/Y (pixel/row) position of the rectangle
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* width,height - The width (pixels) and height (rows of the rectangle)
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* convert - The function to use to convert from the local framebuffer
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* color format to the remote framebuffer color format.
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*
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* Returned Value:
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* The size of the transfer in bytes.
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*
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****************************************************************************/
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static size_t vnc_copy16(FAR struct vnc_session_s *session,
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nxgl_coord_t row, nxgl_coord_t col,
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nxgl_coord_t height, nxgl_coord_t width,
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vnc_convert16_t convert)
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{
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#if defined(CONFIG_VNCSERVER_COLORFMT_RGB16)
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FAR struct rfb_framebufferupdate_s *update;
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FAR const uint16_t *srcleft;
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FAR const uint16_t *src;
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FAR uint16_t *dest;
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nxgl_coord_t x;
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nxgl_coord_t y;
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/* Destination rectangle start address */
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update = (FAR struct rfb_framebufferupdate_s *)session->outbuf;
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dest = (FAR uint16_t *)update->rect[0].data;
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/* Source rectangle start address (left/top)*/
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srcleft = (FAR uint16_t *)(session->fb + RFB_STRIDE * y + RFB_BYTESPERPIXEL * x);
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/* Transfer each row from the source buffer into the update buffer */
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for (y = 0; y < row; y++)
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{
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src = srcleft;
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for (y = 0; y < row; y++)
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{
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*dest++ = convert(*src);
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src++;
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}
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srcleft = (FAR uint16_t *)((uintptr_t)srcleft + RFB_STRIDE);
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}
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return (size_t)((uintptr_t)dest - (uintptr_t)update->rect[0].data);
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#elif defined(CONFIG_VNCSERVER_COLORFMT_RGB32)
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FAR struct rfb_framebufferupdate_s *update;
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FAR const uint32_t *srcleft;
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FAR const uint32_t *src;
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FAR uint16_t *dest;
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nxgl_coord_t x;
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nxgl_coord_t y;
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/* Destination rectangle start address */
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update = (FAR struct rfb_framebufferupdate_s *)session->outbuf;
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dest = (FAR uint16_t *)update->rect[0].data;
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/* Source rectangle start address */
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srcleft = (FAR uint32_t *)(session->fb + RFB_STRIDE * y + RFB_BYTESPERPIXEL * x);
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for (y = 0; y < row; y++)
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{
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src = srcleft;
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for (y = 0; y < row; y++)
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{
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*dest++ = convert(*src);
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src++;
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}
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srcleft = (FAR uint32_t *)((uintptr_t)srcleft + RFB_STRIDE);
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}
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return (size_t)((uintptr_t)dest - (uintptr_t)update->rect[0].data);
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#endif
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}
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/****************************************************************************
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* Name: vnc_copy32
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*
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* Description:
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* Copy a 16/32-bit pixels from the source rectangle to a 32-bit pixel
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* destination rectangle.
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*
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* Input Parameters:
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* session - A reference to the VNC session structure.
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* row,col - The upper left X/Y (pixel/row) position of the rectangle
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* width,height - The width (pixels) and height (rows of the rectangle)
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* convert - The function to use to convert from the local framebuffer
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* color format to the remote framebuffer color format.
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*
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* Returned Value:
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* The size of the transfer in bytes.
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*
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****************************************************************************/
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static size_t vnc_copy32(FAR struct vnc_session_s *session,
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nxgl_coord_t row, nxgl_coord_t col,
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nxgl_coord_t height, nxgl_coord_t width,
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vnc_convert32_t convert)
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{
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#if defined(CONFIG_VNCSERVER_COLORFMT_RGB16)
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FAR struct rfb_framebufferupdate_s *update;
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FAR const uint16_t *srcleft;
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FAR const uint16_t *src;
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FAR uint32_t *dest;
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nxgl_coord_t x;
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nxgl_coord_t y;
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/* Destination rectangle start address */
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update = (FAR struct rfb_framebufferupdate_s *)session->outbuf;
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dest = (FAR uint32_t *)update->rect[0].data;
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/* Source rectangle start address (left/top)*/
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srcleft = (FAR uint16_t *)(session->fb + RFB_STRIDE * y + RFB_BYTESPERPIXEL * x);
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/* Transfer each row from the source buffer into the update buffer */
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for (y = 0; y < row; y++)
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{
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src = srcleft;
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for (y = 0; y < row; y++)
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{
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*dest++ = convert(*src);
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src++;
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}
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srcleft = (FAR uint16_t *)((uintptr_t)srcleft + RFB_STRIDE);
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}
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return (size_t)((uintptr_t)srcleft - (uintptr_t)update->rect[0].data);
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#elif defined(CONFIG_VNCSERVER_COLORFMT_RGB32)
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FAR struct rfb_framebufferupdate_s *update;
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FAR const uint32_t *srcleft;
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FAR const uint32_t *src;
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FAR uint32_t *dest;
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nxgl_coord_t x;
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nxgl_coord_t y;
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/* Destination rectangle start address */
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update = (FAR struct rfb_framebufferupdate_s *)session->outbuf;
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dest = (FAR uint32_t *)update->rect[0].data;
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/* Source rectangle start address */
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srcleft = (FAR uint32_t *)(session->fb + RFB_STRIDE * y + RFB_BYTESPERPIXEL * x);
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for (y = 0; y < row; y++)
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{
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src = srcleft;
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for (y = 0; y < row; y++)
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{
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*dest++ = convert(*src);
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src++;
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}
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srcleft = (FAR uint32_t *)((uintptr_t)srcleft + RFB_STRIDE);
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}
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return (size_t)((uintptr_t)srcleft - (uintptr_t)update->rect[0].data);
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#endif
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}
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/****************************************************************************
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* Name: vnc_updater
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*
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@ -226,10 +517,11 @@ static FAR void *vnc_updater(FAR void *arg)
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{
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FAR struct vnc_session_s *session = (FAR struct vnc_session_s *)arg;
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FAR struct rfb_framebufferupdate_s *update;
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FAR struct rfb_rectangle_s *destrect;
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FAR struct vnc_fbupdate_s *srcrect;
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FAR const uint8_t *srcdata;
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FAR uint8_t *destdata;
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FAR const uint8_t *srcrow;
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FAR const uint8_t *src;
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nxgl_coord_t srcwidth;
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nxgl_coord_t srcheight;
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nxgl_coord_t destwidth;
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@ -242,6 +534,17 @@ static FAR void *vnc_updater(FAR void *arg)
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nxgl_coord_t y;
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unsigned int bytesperpixel;
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unsigned int maxwidth;
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size_t size;
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ssize_t nsent;
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union
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{
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vnc_convert16_t bpp16;
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vnc_convert32_t bpp32;
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} convert;
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bool color32 = false;
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/* Set up some constant pointers and values */
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DEBUGASSERT(session != NULL);
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update = (FAR struct rfb_framebufferupdate_s *)session->outbuf;
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@ -250,6 +553,34 @@ static FAR void *vnc_updater(FAR void *arg)
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bytesperpixel = (session->bpp + 7) >> 3;
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maxwidth = CONFIG_VNCSERVER_UPDATE_BUFSIZE / bytesperpixel;
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/* Set up the color conversion */
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switch (session->colorfmt)
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{
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case FB_FMT_RGB16_555:
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convert.bpp16 = vnc_convert_rgb16_555;
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break;
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case FB_FMT_RGB16_565:
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convert.bpp16 = vnc_convert_rgb16_565;
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break;
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case FB_FMT_RGB32:
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convert.bpp32 = vnc_convert_rgb32_888;
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color32 = true;
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break;
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default:
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gdbg("ERROR: Unrecognized color format: %d\n", session->colorfmt);
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goto errout;
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}
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/* Then loop, processing updates until we are asked to stop.
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* REVISIT: Probably need some kind of signal mechanism to wake up
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* vnc_remove_queue() in order to stop. Or perhaps a special STOP
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* message in the queue?
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*/
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while (session->state == VNCSERVER_RUNNING)
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{
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/* Get the next queued rectangle update. This call will block until an
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@ -270,9 +601,9 @@ static FAR void *vnc_updater(FAR void *arg)
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DEBUGASSERT(srcrect->rect.pt1.y <= srcrect->rect.pt2.y);
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srcheight = srcrect->rect.pt2.y - srcrect->rect.pt1.y + 1;
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srcdata = session->fb +
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RFB_STRIDE * srcrect->rect.pt1.y +
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RFB_BYTESPERPIXEL * srcrect->rect.pt1.x;
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srcrow = session->fb +
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RFB_STRIDE * srcrect->rect.pt1.y +
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RFB_BYTESPERPIXEL * srcrect->rect.pt1.x;
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deststride = srcwidth * bytesperpixel;
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if (deststride > maxwidth)
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@ -290,20 +621,18 @@ static FAR void *vnc_updater(FAR void *arg)
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/* Format the rectangle header. We may have to send several update
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* messages if the pre-allocated outbuf is smaller than the rectangle.
|
||||
* Each update contains a small "sub-rectangle" of the origin update.
|
||||
*
|
||||
* Loop until all rows have been output. Start with the top row and
|
||||
* transfer rectangles horizontally across the each group of
|
||||
* destheight rows.
|
||||
* Loop until all sub-rectangles have been output. Start with the
|
||||
* top row and transfer rectangles horizontally across each swath.
|
||||
* The height of the swath is destwidth (the last may be shorter).
|
||||
*/
|
||||
|
||||
for (y = srcrect->rect.pt1.y;
|
||||
srcheight > 0;
|
||||
srcheight -= updheight, y += updheight)
|
||||
srcheight -= updheight, y += updheight,
|
||||
srcrow += RFB_STRIDE * updheight)
|
||||
{
|
||||
/* Destination rectangle start address */
|
||||
|
||||
destdata = destrect->data;
|
||||
|
||||
/* updheight = Height to update on this pass through the loop.
|
||||
* This will be destheight unless fewer than that number of rows
|
||||
* remain.
|
||||
|
|
@ -315,14 +644,16 @@ static FAR void *vnc_updater(FAR void *arg)
|
|||
updheight = srcheight;
|
||||
}
|
||||
|
||||
/* Loop until this row has been ouput. Start with the leftmost
|
||||
* pixel and transfer rectangles horizontally with width of
|
||||
* destwidth until all srcwidth columns have been transferred.
|
||||
/* Loop until this horizontal swath has sent to the VNC client.
|
||||
* Start with the leftmost pixel and transfer rectangles
|
||||
* horizontally with width of destwidth until all srcwidth
|
||||
* columns have been transferred (the last rectangle may be
|
||||
* narrower).
|
||||
*/
|
||||
|
||||
for (width = srcwidth, x = srcrect->rect.pt1.x;
|
||||
for (width = srcwidth, x = srcrect->rect.pt1.x, src = srcrow;
|
||||
width > 0;
|
||||
width -= updwidth, x += updwidth)
|
||||
width -= updwidth, x += updwidth, src += updwidth)
|
||||
{
|
||||
/* updwidth = Width to update on this pass through the loop.
|
||||
* This will be destwidth unless fewer than that number of
|
||||
|
|
@ -335,6 +666,21 @@ static FAR void *vnc_updater(FAR void *arg)
|
|||
updwidth = width;
|
||||
}
|
||||
|
||||
/* Transfer the frame buffer data into the rectangle,
|
||||
* performing the necessary color conversions.
|
||||
*/
|
||||
|
||||
if (color32)
|
||||
{
|
||||
size = vnc_copy32(session, y, x, updheight, updwidth,
|
||||
convert.bpp32);
|
||||
}
|
||||
else
|
||||
{
|
||||
size = vnc_copy16(session, y, x, updheight, updwidth,
|
||||
convert.bpp16);
|
||||
}
|
||||
|
||||
/* Format the FramebufferUpdate message */
|
||||
|
||||
update->msgtype = RFB_FBUPDATE_MSG;
|
||||
|
|
@ -347,21 +693,28 @@ static FAR void *vnc_updater(FAR void *arg)
|
|||
rfb_putbe16(destrect->height, updheight);
|
||||
rfb_putbe16(destrect->encoding, RFB_ENCODING_RAW);
|
||||
|
||||
/* Transfer the frame buffer data into the rectangle,
|
||||
* performing the necessary color conversions.
|
||||
*/
|
||||
#warning Missing logic
|
||||
DEBUGASSERT(size <= CONFIG_VNCSERVER_UPDATE_BUFSIZE);
|
||||
|
||||
/* Update the src and destination addresses */
|
||||
/* Then send the update packet to the VNC client */
|
||||
|
||||
srcdata += RFB_STRIDE;
|
||||
destdata += updwidth * bytesperpixel;
|
||||
size += SIZEOF_RFB_FRAMEBUFFERUPDATE_S(0);
|
||||
nsent = psock_send(&session->connect, session->outbuf, size, 0);
|
||||
if (nsent < 0)
|
||||
{
|
||||
gdbg("ERROR: Send FrameBufferUpdate failed: %d\n",
|
||||
get_errno());
|
||||
goto errout;
|
||||
}
|
||||
|
||||
DEBUGASSERT(nsent == size);
|
||||
}
|
||||
}
|
||||
|
||||
vnc_free_update(session, srcrect);
|
||||
}
|
||||
|
||||
errout:
|
||||
session->state = VNCSERVER_STOPPED;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue