shape.c

 
#include <freerdp/config.h>
 
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
 
#include <freerdp/freerdp.h>
#include <freerdp/gdi/gdi.h>
 
#include <freerdp/gdi/bitmap.h>
#include <freerdp/gdi/region.h>
#include <freerdp/gdi/shape.h>
 
#include <freerdp/log.h>
 
#include "clipping.h"
#include "../gdi/gdi.h"
 
#define TAG FREERDP_TAG("gdi.shape")
 
WINPR_ATTR_NODISCARD
static BOOL Ellipse_Bresenham(HGDI_DC hdc, int x1, int y1, int x2, int y2)
{
  INT32 a = (x1 < x2) ? x2 - x1 : x1 - x2;
  const INT32 b = (y1 < y2) ? y2 - y1 : y1 - y2;
  INT32 c = b & 1;
  INT32 dx = 4 * (1 - a) * b * b;
  INT32 dy = 4 * (c + 1) * a * a;
  INT32 e = dx + dy + c * a * a;
 
  if (x1 > x2)
  {
    x1 = x2;
    x2 += a;
  }
 
  if (y1 > y2)
    y1 = y2;
 
  y1 += (b + 1) / 2;
  y2 = y1 - c;
  a *= 8 * a;
  c = 8 * b * b;
 
  do
  {
    gdi_SetPixel(hdc, WINPR_ASSERTING_INT_CAST(UINT32, x2),
                 WINPR_ASSERTING_INT_CAST(UINT32, y1), 0);
    gdi_SetPixel(hdc, WINPR_ASSERTING_INT_CAST(UINT32, x1),
                 WINPR_ASSERTING_INT_CAST(UINT32, y1), 0);
    gdi_SetPixel(hdc, WINPR_ASSERTING_INT_CAST(UINT32, x1),
                 WINPR_ASSERTING_INT_CAST(UINT32, y2), 0);
    gdi_SetPixel(hdc, WINPR_ASSERTING_INT_CAST(UINT32, x2),
                 WINPR_ASSERTING_INT_CAST(UINT32, y2), 0);
 
    const INT32 e2 = 2 * e;
 
    if (e2 >= dx)
    {
      x1++;
      x2--;
      e += dx += c;
    }
 
    if (e2 <= dy)
    {
      y1++;
      y2--;
      e += dy += a;
    }
  } while (x1 <= x2);
 
  while (y1 - y2 < b)
  {
    y1++;
    y2--;
 
    gdi_SetPixel(hdc, WINPR_ASSERTING_INT_CAST(uint32_t, x1 - 1),
                 WINPR_ASSERTING_INT_CAST(uint32_t, y1), 0);
    gdi_SetPixel(hdc, WINPR_ASSERTING_INT_CAST(uint32_t, x1 - 1),
                 WINPR_ASSERTING_INT_CAST(uint32_t, y2), 0);
  }
  return TRUE;
}
 
BOOL gdi_Ellipse(HGDI_DC hdc, int nLeftRect, int nTopRect, int nRightRect, int nBottomRect)
{
  return Ellipse_Bresenham(hdc, nLeftRect, nTopRect, nRightRect, nBottomRect);
}
 
BOOL gdi_FillRect(HGDI_DC hdc, const GDI_RECT* rect, HGDI_BRUSH hbr)
{
  INT32 nXDest = 0;
  INT32 nYDest = 0;
  INT32 nWidth = 0;
  INT32 nHeight = 0;
 
  if (!gdi_RectToCRgn(rect, &nXDest, &nYDest, &nWidth, &nHeight))
    return FALSE;
 
  if (!hdc || !hbr)
    return FALSE;
 
  if (!gdi_ClipCoords(hdc, &nXDest, &nYDest, &nWidth, &nHeight, nullptr, nullptr))
    return TRUE;
 
  switch (hbr->style)
  {
    case GDI_BS_SOLID:
    {
      const UINT32 color = hbr->color;
 
      for (INT32 x = 0; x < nWidth; x++)
      {
        BYTE* dstp = gdi_get_bitmap_pointer(hdc, nXDest + x, nYDest);
 
        if (dstp)
          FreeRDPWriteColor(dstp, hdc->format, color);
      }
 
      const BYTE* srcp = gdi_get_bitmap_pointer(hdc, nXDest, nYDest);
      const UINT32 formatSize = FreeRDPGetBytesPerPixel(hdc->format);
      if (formatSize == 0)
        return FALSE;
 
      for (INT32 y = 1; y < nHeight; y++)
      {
        BYTE* dstp = gdi_get_bitmap_pointer(hdc, nXDest, nYDest + y);
        if (!dstp)
          return FALSE;
        memcpy(dstp, srcp, 1ull * WINPR_ASSERTING_INT_CAST(size_t, nWidth) * formatSize);
      }
    }
    break;
 
    case GDI_BS_HATCHED:
    case GDI_BS_PATTERN:
    {
      const BOOL monochrome = (hbr->pattern->format == PIXEL_FORMAT_MONO);
      const UINT32 formatSize = FreeRDPGetBytesPerPixel(hbr->pattern->format);
      if (formatSize == 0)
        return FALSE;
 
      for (INT32 y = 0; y < nHeight; y++)
      {
        for (INT32 x = 0; x < nWidth; x++)
        {
          const size_t yOffset =
              ((1ULL * WINPR_ASSERTING_INT_CAST(size_t, nYDest) +
                WINPR_ASSERTING_INT_CAST(size_t, y)) *
               WINPR_ASSERTING_INT_CAST(size_t, hbr->pattern->width) %
               WINPR_ASSERTING_INT_CAST(size_t, hbr->pattern->height)) *
              formatSize;
          const size_t xOffset = ((1ULL * WINPR_ASSERTING_INT_CAST(size_t, nXDest) +
                                   WINPR_ASSERTING_INT_CAST(size_t, x)) %
                                  WINPR_ASSERTING_INT_CAST(size_t, hbr->pattern->width)) *
                                 formatSize;
          const BYTE* patp = &hbr->pattern->data[yOffset + xOffset];
 
          UINT32 dstColor = 0;
          if (monochrome)
          {
            if (*patp == 0)
              dstColor = hdc->bkColor;
            else
              dstColor = hdc->textColor;
          }
          else
          {
            const UINT32 tmp = FreeRDPReadColor(patp, hbr->pattern->format);
            dstColor =
                FreeRDPConvertColor(tmp, hbr->pattern->format, hdc->format, nullptr);
          }
 
          BYTE* dstp = gdi_get_bitmap_pointer(hdc, nXDest + x, nYDest + y);
          if (dstp)
            FreeRDPWriteColor(dstp, hdc->format, dstColor);
        }
      }
    }
    break;
 
    default:
      break;
  }
 
  return gdi_InvalidateRegion(hdc, nXDest, nYDest, nWidth, nHeight);
}
 
BOOL gdi_Polygon(WINPR_ATTR_UNUSED HGDI_DC hdc, WINPR_ATTR_UNUSED GDI_POINT* lpPoints,
                 WINPR_ATTR_UNUSED int nCount)
{
  WLog_ERR(TAG, "Not implemented!");
  return FALSE;
}
 
BOOL gdi_PolyPolygon(WINPR_ATTR_UNUSED HGDI_DC hdc, WINPR_ATTR_UNUSED GDI_POINT* lpPoints,
                     WINPR_ATTR_UNUSED int* lpPolyCounts, WINPR_ATTR_UNUSED int nCount)
{
  WLog_ERR(TAG, "Not implemented!");
  return FALSE;
}
 
BOOL gdi_Rectangle(HGDI_DC hdc, INT32 nXDst, INT32 nYDst, INT32 nWidth, INT32 nHeight)
{
  UINT32 color = 0;
 
  if (!gdi_ClipCoords(hdc, &nXDst, &nYDst, &nWidth, &nHeight, nullptr, nullptr))
    return TRUE;
 
  color = hdc->textColor;
 
  for (INT32 y = 0; y < nHeight; y++)
  {
    BYTE* dstLeft = gdi_get_bitmap_pointer(hdc, nXDst, nYDst + y);
    BYTE* dstRight = gdi_get_bitmap_pointer(hdc, nXDst + nWidth - 1, nYDst + y);
 
    if (dstLeft)
      FreeRDPWriteColor(dstLeft, hdc->format, color);
 
    if (dstRight)
      FreeRDPWriteColor(dstRight, hdc->format, color);
  }
 
  for (INT32 x = 0; x < nWidth; x++)
  {
    BYTE* dstTop = gdi_get_bitmap_pointer(hdc, nXDst + x, nYDst);
    BYTE* dstBottom = gdi_get_bitmap_pointer(hdc, nXDst + x, nYDst + nHeight - 1);
 
    if (dstTop)
      FreeRDPWriteColor(dstTop, hdc->format, color);
 
    if (dstBottom)
      FreeRDPWriteColor(dstBottom, hdc->format, color);
  }
 
  return FALSE;
}