xf_graphics.c

 
#include <freerdp/config.h>
 
#include <X11/Xlib.h>
#include <X11/Xutil.h>
 
#ifdef WITH_XCURSOR
#include <X11/Xcursor/Xcursor.h>
#endif
 
#include <float.h>
#include <math.h>
 
#include <winpr/crt.h>
#include <winpr/assert.h>
 
#include <freerdp/codec/bitmap.h>
#include <freerdp/codec/rfx.h>
 
#include "xf_graphics.h"
#include "xf_event.h"
 
#include <freerdp/log.h>
#define TAG CLIENT_TAG("x11")
 
static BOOL xf_Pointer_Set(rdpContext* context, rdpPointer* pointer);
 
BOOL xf_decode_color(xfContext* xfc, const UINT32 srcColor, XColor* color)
{
  UINT32 SrcFormat = 0;
  BYTE r = 0;
  BYTE g = 0;
  BYTE b = 0;
  BYTE a = 0;
 
  if (!xfc || !color)
    return FALSE;
 
  rdpGdi* gdi = xfc->common.context.gdi;
 
  if (!gdi)
    return FALSE;
 
  rdpSettings* settings = xfc->common.context.settings;
 
  if (!settings)
    return FALSE;
 
  switch (freerdp_settings_get_uint32(settings, FreeRDP_ColorDepth))
  {
    case 32:
    case 24:
      SrcFormat = PIXEL_FORMAT_BGR24;
      break;
 
    case 16:
      SrcFormat = PIXEL_FORMAT_RGB16;
      break;
 
    case 15:
      SrcFormat = PIXEL_FORMAT_RGB15;
      break;
 
    case 8:
      SrcFormat = PIXEL_FORMAT_RGB8;
      break;
 
    default:
      return FALSE;
  }
 
  FreeRDPSplitColor(srcColor, SrcFormat, &r, &g, &b, &a, &gdi->palette);
  color->blue = (unsigned short)(b << 8);
  color->green = (unsigned short)(g << 8);
  color->red = (unsigned short)(r << 8);
  color->flags = DoRed | DoGreen | DoBlue;
 
  if (XAllocColor(xfc->display, xfc->colormap, color) == 0)
    return FALSE;
 
  return TRUE;
}
 
static BOOL xf_Pointer_GetCursorForCurrentScale(rdpContext* context, rdpPointer* pointer,
                                                Cursor* cursor)
{
#if defined(WITH_XCURSOR) && defined(WITH_XRENDER)
  xfContext* xfc = (xfContext*)context;
  xfPointer* xpointer = (xfPointer*)pointer;
  XcursorImage ci = { 0 };
  int cursorIndex = -1;
 
  if (!context || !pointer || !context->gdi)
    return FALSE;
 
  rdpSettings* settings = xfc->common.context.settings;
 
  if (!settings)
    return FALSE;
 
  const double dw = freerdp_settings_get_uint32(settings, FreeRDP_DesktopWidth);
  const double xscale =
      (freerdp_settings_get_bool(settings, FreeRDP_SmartSizing) ? 1.0 * xfc->scaledWidth / dw
                                                                : 1);
  const double dh = freerdp_settings_get_uint32(settings, FreeRDP_DesktopHeight);
  const double yscale =
      (freerdp_settings_get_bool(settings, FreeRDP_SmartSizing) ? 1.0 * xfc->scaledHeight / dh
                                                                : 1);
  const UINT32 xTargetSize = MAX(1, (UINT32)lround(1.0 * pointer->width * xscale));
  const UINT32 yTargetSize = MAX(1, (UINT32)lround(1.0 * pointer->height * yscale));
 
  WLog_DBG(TAG, "scaled: %" PRIu32 "x%" PRIu32 ", desktop: %" PRIu32 "x%" PRIu32,
           xfc->scaledWidth, xfc->scaledHeight,
           freerdp_settings_get_uint32(settings, FreeRDP_DesktopWidth),
           freerdp_settings_get_uint32(settings, FreeRDP_DesktopHeight));
  for (UINT32 i = 0; i < xpointer->nCursors; i++)
  {
    if ((xpointer->cursorWidths[i] == xTargetSize) &&
        (xpointer->cursorHeights[i] == yTargetSize))
    {
      cursorIndex = WINPR_ASSERTING_INT_CAST(int, i);
    }
  }
 
  if (cursorIndex == -1)
  {
    UINT32 CursorFormat = 0;
    xf_lock_x11(xfc);
 
    if (!xfc->invert)
      CursorFormat = (!xfc->big_endian) ? PIXEL_FORMAT_RGBA32 : PIXEL_FORMAT_ABGR32;
    else
      CursorFormat = (!xfc->big_endian) ? PIXEL_FORMAT_BGRA32 : PIXEL_FORMAT_ARGB32;
 
    if (xpointer->nCursors == xpointer->mCursors)
    {
      void* tmp2 = NULL;
      xpointer->mCursors = (xpointer->mCursors == 0 ? 1 : xpointer->mCursors * 2);
 
      tmp2 = realloc(xpointer->cursorWidths, sizeof(UINT32) * xpointer->mCursors);
      if (!tmp2)
      {
        xf_unlock_x11(xfc);
        return FALSE;
      }
      xpointer->cursorWidths = tmp2;
 
      tmp2 = realloc(xpointer->cursorHeights, sizeof(UINT32) * xpointer->mCursors);
      if (!tmp2)
      {
        xf_unlock_x11(xfc);
        return FALSE;
      }
      xpointer->cursorHeights = (UINT32*)tmp2;
 
      tmp2 = realloc(xpointer->cursors, sizeof(Cursor) * xpointer->mCursors);
      if (!tmp2)
      {
        xf_unlock_x11(xfc);
        return FALSE;
      }
      xpointer->cursors = (Cursor*)tmp2;
    }
 
    ci.version = XCURSOR_IMAGE_VERSION;
    ci.size = sizeof(ci);
    ci.width = xTargetSize;
    ci.height = yTargetSize;
    ci.xhot = (XcursorDim)lround(1.0 * pointer->xPos * xscale);
    ci.yhot = (XcursorDim)lround(1.0 * pointer->yPos * yscale);
    const size_t size = 1ull * ci.height * ci.width * FreeRDPGetBytesPerPixel(CursorFormat);
 
    void* tmp = winpr_aligned_malloc(size, 16);
    if (!tmp)
    {
      xf_unlock_x11(xfc);
      return FALSE;
    }
    ci.pixels = (XcursorPixel*)tmp;
 
    const double xs = fabs(fabs(xscale) - 1.0);
    const double ys = fabs(fabs(yscale) - 1.0);
 
    WLog_DBG(TAG,
             "cursorIndex %" PRId32 " scaling pointer %" PRIu32 "x%" PRIu32 " --> %" PRIu32
             "x%" PRIu32 " [%lfx%lf]",
             cursorIndex, pointer->width, pointer->height, ci.width, ci.height, xscale, yscale);
    if ((xs > DBL_EPSILON) || (ys > DBL_EPSILON))
    {
      if (!freerdp_image_scale((BYTE*)ci.pixels, CursorFormat, 0, 0, 0, ci.width, ci.height,
                               (BYTE*)xpointer->cursorPixels, CursorFormat, 0, 0, 0,
                               pointer->width, pointer->height))
      {
        winpr_aligned_free(tmp);
        xf_unlock_x11(xfc);
        return FALSE;
      }
    }
    else
    {
      ci.pixels = xpointer->cursorPixels;
    }
 
    const size_t idx = xpointer->nCursors;
    xpointer->cursorWidths[idx] = ci.width;
    xpointer->cursorHeights[idx] = ci.height;
    xpointer->cursors[idx] = XcursorImageLoadCursor(xfc->display, &ci);
    cursorIndex = WINPR_ASSERTING_INT_CAST(int, idx);
    xpointer->nCursors += 1;
 
    winpr_aligned_free(tmp);
 
    xf_unlock_x11(xfc);
  }
  else
  {
    WLog_DBG(TAG, "using cached cursor %" PRId32, cursorIndex);
  }
 
  cursor[0] = xpointer->cursors[cursorIndex];
#endif
  return TRUE;
}
 
/* Pointer Class */
static Window xf_Pointer_get_window(xfContext* xfc)
{
  if (!xfc)
  {
    WLog_WARN(TAG, "xf_Pointer: Invalid context");
    return 0;
  }
  if (xfc->remote_app)
  {
    if (!xfc->appWindow)
    {
      WLog_WARN(TAG, "xf_Pointer: Invalid appWindow");
      return 0;
    }
    return xfc->appWindow->handle;
  }
  else
  {
    if (!xfc->window)
    {
      WLog_WARN(TAG, "xf_Pointer: Invalid window");
      return 0;
    }
    return xfc->window->handle;
  }
}
 
BOOL xf_pointer_update_scale(xfContext* xfc)
{
  xfPointer* pointer = NULL;
  WINPR_ASSERT(xfc);
 
  pointer = xfc->pointer;
  if (!pointer)
    return TRUE;
 
  return xf_Pointer_Set(&xfc->common.context, &xfc->pointer->pointer);
}
 
static BOOL xf_Pointer_New(rdpContext* context, rdpPointer* pointer)
{
  BOOL rc = FALSE;
 
#ifdef WITH_XCURSOR
  UINT32 CursorFormat = 0;
  size_t size = 0;
  xfContext* xfc = (xfContext*)context;
  xfPointer* xpointer = (xfPointer*)pointer;
 
  if (!context || !pointer || !context->gdi)
    goto fail;
 
  if (!xfc->invert)
    CursorFormat = (!xfc->big_endian) ? PIXEL_FORMAT_RGBA32 : PIXEL_FORMAT_ABGR32;
  else
    CursorFormat = (!xfc->big_endian) ? PIXEL_FORMAT_BGRA32 : PIXEL_FORMAT_ARGB32;
 
  xpointer->nCursors = 0;
  xpointer->mCursors = 0;
 
  size = 1ull * pointer->height * pointer->width * FreeRDPGetBytesPerPixel(CursorFormat);
 
  if (!(xpointer->cursorPixels = (XcursorPixel*)winpr_aligned_malloc(size, 16)))
    goto fail;
 
  if (!freerdp_image_copy_from_pointer_data(
          (BYTE*)xpointer->cursorPixels, CursorFormat, 0, 0, 0, pointer->width, pointer->height,
          pointer->xorMaskData, pointer->lengthXorMask, pointer->andMaskData,
          pointer->lengthAndMask, pointer->xorBpp, &context->gdi->palette))
  {
    winpr_aligned_free(xpointer->cursorPixels);
    goto fail;
  }
 
#endif
 
  rc = TRUE;
 
fail:
  WLog_DBG(TAG, "%p", rc ? pointer : NULL);
  return rc;
}
 
static void xf_Pointer_Free(rdpContext* context, rdpPointer* pointer)
{
  WLog_DBG(TAG, "%p", pointer);
 
#ifdef WITH_XCURSOR
  xfContext* xfc = (xfContext*)context;
  xfPointer* xpointer = (xfPointer*)pointer;
 
  xf_lock_x11(xfc);
 
  winpr_aligned_free(xpointer->cursorPixels);
  free(xpointer->cursorWidths);
  free(xpointer->cursorHeights);
 
  for (UINT32 i = 0; i < xpointer->nCursors; i++)
  {
    XFreeCursor(xfc->display, xpointer->cursors[i]);
  }
 
  free(xpointer->cursors);
  xpointer->nCursors = 0;
  xpointer->mCursors = 0;
 
  xf_unlock_x11(xfc);
#endif
}
 
static BOOL xf_Pointer_Set(rdpContext* context, rdpPointer* pointer)
{
  WLog_DBG(TAG, "%p", pointer);
#ifdef WITH_XCURSOR
  xfContext* xfc = (xfContext*)context;
  Window handle = xf_Pointer_get_window(xfc);
 
  WINPR_ASSERT(xfc);
  WINPR_ASSERT(pointer);
 
  xfc->pointer = (xfPointer*)pointer;
 
  /* in RemoteApp mode, window can be null if none has had focus */
 
  if (handle)
  {
    if (!xf_Pointer_GetCursorForCurrentScale(context, pointer, &(xfc->pointer->cursor)))
      return FALSE;
    xf_lock_x11(xfc);
    XDefineCursor(xfc->display, handle, xfc->pointer->cursor);
    xf_unlock_x11(xfc);
  }
  else
  {
    WLog_WARN(TAG, "handle=%ld", handle);
  }
#endif
  xfc->isCursorHidden = false;
  return TRUE;
}
 
static BOOL xf_Pointer_SetNull(rdpContext* context)
{
  WLog_DBG(TAG, "called");
#ifdef WITH_XCURSOR
  xfContext* xfc = (xfContext*)context;
  static Cursor nullcursor = None;
  Window handle = xf_Pointer_get_window(xfc);
  xf_lock_x11(xfc);
 
  if (nullcursor == None)
  {
    XcursorImage ci = { 0 };
    XcursorPixel xp = 0;
 
    ci.version = XCURSOR_IMAGE_VERSION;
    ci.size = sizeof(ci);
    ci.width = ci.height = 1;
    ci.xhot = ci.yhot = 0;
    ci.pixels = &xp;
    nullcursor = XcursorImageLoadCursor(xfc->display, &ci);
  }
 
  xfc->pointer = NULL;
 
  if ((handle) && (nullcursor != None))
    XDefineCursor(xfc->display, handle, nullcursor);
 
  xf_unlock_x11(xfc);
#endif
  xfc->isCursorHidden = true;
  return TRUE;
}
 
static BOOL xf_Pointer_SetDefault(rdpContext* context)
{
  WLog_DBG(TAG, "called");
#ifdef WITH_XCURSOR
  xfContext* xfc = (xfContext*)context;
  Window handle = xf_Pointer_get_window(xfc);
  xf_lock_x11(xfc);
  xfc->pointer = NULL;
 
  if (handle)
    XUndefineCursor(xfc->display, handle);
 
  xf_unlock_x11(xfc);
#endif
  xfc->isCursorHidden = false;
  return TRUE;
}
 
static BOOL xf_Pointer_SetPosition(rdpContext* context, UINT32 x, UINT32 y)
{
  xfContext* xfc = (xfContext*)context;
  XWindowAttributes current = { 0 };
  XSetWindowAttributes tmp = { 0 };
  BOOL ret = FALSE;
  Status rc = 0;
  Window handle = xf_Pointer_get_window(xfc);
 
  if (!handle)
  {
    WLog_WARN(TAG, "focus %d, handle%lu", xfc->focused, handle);
    return TRUE;
  }
 
  WLog_DBG(TAG, "%" PRIu32 "x%" PRIu32, x, y);
  if (!xfc->focused)
    return TRUE;
 
  xf_adjust_coordinates_to_screen(xfc, &x, &y);
 
  xf_lock_x11(xfc);
 
  rc = XGetWindowAttributes(xfc->display, handle, &current);
  if (rc == 0)
  {
    WLog_WARN(TAG, "XGetWindowAttributes==%d", rc);
    goto out;
  }
 
  tmp.event_mask = (current.your_event_mask & ~(PointerMotionMask));
 
  rc = XChangeWindowAttributes(xfc->display, handle, CWEventMask, &tmp);
  if (rc == 0)
  {
    WLog_WARN(TAG, "XChangeWindowAttributes==%d", rc);
    goto out;
  }
 
  rc = XWarpPointer(xfc->display, handle, handle, 0, 0, 0, 0, WINPR_ASSERTING_INT_CAST(int, x),
                    WINPR_ASSERTING_INT_CAST(int, y));
  if (rc == 0)
    WLog_WARN(TAG, "XWarpPointer==%d", rc);
  tmp.event_mask = current.your_event_mask;
  rc = XChangeWindowAttributes(xfc->display, handle, CWEventMask, &tmp);
  if (rc == 0)
    WLog_WARN(TAG, "2.try XChangeWindowAttributes==%d", rc);
  ret = TRUE;
out:
  xf_unlock_x11(xfc);
  return ret;
}
 
/* Graphics Module */
BOOL xf_register_pointer(rdpGraphics* graphics)
{
  rdpPointer pointer = { 0 };
 
  pointer.size = sizeof(xfPointer);
  pointer.New = xf_Pointer_New;
  pointer.Free = xf_Pointer_Free;
  pointer.Set = xf_Pointer_Set;
  pointer.SetNull = xf_Pointer_SetNull;
  pointer.SetDefault = xf_Pointer_SetDefault;
  pointer.SetPosition = xf_Pointer_SetPosition;
  graphics_register_pointer(graphics, &pointer);
  return TRUE;
}
 
UINT32 xf_get_local_color_format(xfContext* xfc, BOOL aligned)
{
  UINT32 DstFormat = 0;
  BOOL invert = FALSE;
 
  if (!xfc)
    return 0;
 
  invert = xfc->invert;
 
  WINPR_ASSERT(xfc->depth != 0);
  if (xfc->depth == 32)
    DstFormat = (!invert) ? PIXEL_FORMAT_RGBA32 : PIXEL_FORMAT_BGRA32;
  else if (xfc->depth == 30)
    DstFormat = (!invert) ? PIXEL_FORMAT_RGBX32_DEPTH30 : PIXEL_FORMAT_BGRX32_DEPTH30;
  else if (xfc->depth == 24)
  {
    if (aligned)
      DstFormat = (!invert) ? PIXEL_FORMAT_RGBX32 : PIXEL_FORMAT_BGRX32;
    else
      DstFormat = (!invert) ? PIXEL_FORMAT_RGB24 : PIXEL_FORMAT_BGR24;
  }
  else if (xfc->depth == 16)
    DstFormat = PIXEL_FORMAT_RGB16;
  else if (xfc->depth == 15)
    DstFormat = PIXEL_FORMAT_RGB15;
  else
    DstFormat = (!invert) ? PIXEL_FORMAT_RGBX32 : PIXEL_FORMAT_BGRX32;
 
  return DstFormat;
}