void CObjectImageArray::PaintImageGrayed (CG16bitImage &Dest, int x, int y, int iTick, int iRotation) const
// PaintImageGrayed
//
// Paints the image on the destination
{
if (m_pImage)
{
CG16bitImage *pSource = m_pImage->GetImage();
if (pSource == NULL)
return;
int xSrc = ComputeSourceX(iTick);
if (m_pRotationOffset)
{
x += m_pRotationOffset[iRotation % m_iRotationCount].x;
y -= m_pRotationOffset[iRotation % m_iRotationCount].y;
}
Dest.BltGray(xSrc,
m_rcImage.top + (iRotation * RectHeight(m_rcImage)),
RectWidth(m_rcImage),
RectHeight(m_rcImage),
128,
*pSource,
x - (RectWidth(m_rcImage) / 2),
y - (RectHeight(m_rcImage) / 2));
}
}
void CObjectImageArray::PaintSilhoutte (CG16bitImage &Dest,
int x,
int y,
int iTick,
int iRotation,
COLORREF wColor) const
// PaintSilhouette
//
// Paints a silhouette of the object
{
if (m_pImage)
{
CG16bitImage &Source(*m_pImage->GetImage());
int xSrc = ComputeSourceX(iTick);
if (m_pRotationOffset)
{
x += m_pRotationOffset[iRotation % m_iRotationCount].x;
y -= m_pRotationOffset[iRotation % m_iRotationCount].y;
}
Dest.FillMask(xSrc,
m_rcImage.top + (iRotation * RectHeight(m_rcImage)),
RectWidth(m_rcImage),
RectHeight(m_rcImage),
Source,
wColor,
x - (RectWidth(m_rcImage) / 2),
y - (RectHeight(m_rcImage) / 2));
}
}
void CObjectImageArray::PaintImageUL (CG16bitImage &Dest, int x, int y, int iTick, int iRotation, bool srcAlpha) const
// PaintImageUL
//
// Paints the image. x,y is the upper-left corner of the destination
//
// Note: This should not use the rotation offsets
{
if (m_pImage)
{
CG16bitImage &Source(*m_pImage->GetImage());
int xSrc = ComputeSourceX(iTick);
int ySrc;
if (m_iBlending == blendLighten)
{
Dest.BltLighten(xSrc,
m_rcImage.top + (iRotation * RectHeight(m_rcImage)),
RectWidth(m_rcImage),
RectHeight(m_rcImage),
255,
Source,
x,
y);
}
else
{
ySrc = m_rcImage.top + (iRotation * RectHeight(m_rcImage));
Dest.Blt(x, y, Source, xSrc,
ySrc, xSrc + RectWidth(m_rcImage), ySrc + RectHeight(m_rcImage), srcAlpha);
}
}
}
void CObjectImageArray::GenerateGlowImage (int iRotation) const
// GenerateGlowImage
//
// Generates a mask that looks like a glow. The mask is 0 for all image pixels
// and for all pixels where there is no glow (thus we can optimize painting
// of the glow by ignoring 0 values)
{
ASSERT(iRotation >= 0 && iRotation < m_iRotationCount);
// Source
if (m_pImage == NULL)
return;
CG16bitImage &Source(*m_pImage->GetImage());
// Allocate the array of images (if not already allocated)
if (m_pGlowImages == NULL)
m_pGlowImages = new CG16bitImage[m_iRotationCount];
// If the image for this rotation has already been initialized, then
// we're done
if (!m_pGlowImages[iRotation].IsEmpty())
return;
// Otherwise we need to create the glow mask. The glow image is larger
// than the object image (by GLOW_SIZE)
int cxSrcWidth = RectWidth(m_rcImage);
int cySrcHeight = RectHeight(m_rcImage);
int cxGlowWidth = cxSrcWidth + 2 * GLOW_SIZE;
int cyGlowHeight = cySrcHeight + 2 * GLOW_SIZE;
if (m_pGlowImages[iRotation].Create(cxGlowWidth, cyGlowHeight, 8) != NOERROR)
{
m_pGlowImages[iRotation].DiscardSurface();
kernelDebugLogMessage("Unable to create image");
return;
}
RECT rcSrc;
rcSrc.left = ComputeSourceX(0);
rcSrc.top = m_rcImage.top + (iRotation * cySrcHeight);
rcSrc.right = rcSrc.left + cxSrcWidth;
rcSrc.bottom = rcSrc.top + cySrcHeight;
m_pGlowImages[iRotation].DrawGlowImage(0, 0, Source, rcSrc.left,
rcSrc.top, rcSrc.right, rcSrc.bottom, 4);
}
void CObjectImageArray::GenerateScaledImages (int iRotation, int cxWidth, int cyHeight) const
// GenerateScaledImages
//
// Generate scaled images
{
ASSERT(iRotation >= 0 && iRotation < m_iRotationCount);
// Allocate the array of images (if not already allocated)
if (m_pScaledImages == NULL)
m_pScaledImages = new CG16bitImage [m_iRotationCount];
// If the image for this rotation has already been initialized, then
// we're done
if (m_pScaledImages[iRotation].HasRGB())
return;
// Otherwise we need to create the scaled image
m_pScaledImages[iRotation].CreateBlank(cxWidth, cyHeight, false);
// Get the extent of the source image
RECT rcSrc;
rcSrc.left = ComputeSourceX(0);
rcSrc.top = m_rcImage.top + (iRotation * RectHeight(m_rcImage));
rcSrc.right = rcSrc.left + RectWidth(m_rcImage);
rcSrc.bottom = rcSrc.top + RectHeight(m_rcImage);
CG16bitImage *pSource = m_pImage->GetImage();
if (pSource == NULL)
return;
// Scale the image
m_pScaledImages[iRotation].GaussianScaledBlt(
rcSrc.left, rcSrc.top,
RectWidth(rcSrc),
RectHeight(rcSrc),
*pSource,
0, 0,
cxWidth,
cyHeight);
m_pScaledImages[iRotation].SetTransparentColor(0);
}
void CObjectImageArray::PaintRotatedImage (CG16bitImage &Dest,
int x,
int y,
int iTick,
int iRotation) const
// PaintRotatedImage
//
// Paint rotated image
{
if (m_pImage == NULL)
return;
CG16bitImage *pSource = m_pImage->GetImage();
if (pSource == NULL)
return;
int xSrc = ComputeSourceX(iTick);
int cxSrc = RectWidth(m_rcImage);
int cySrc = RectHeight(m_rcImage);
// Calculate the position of the upper-left corner of
// the rotated image.
#if 0
CVector vUL(-cxSrc / 2, cySrc / 2);
vUL = vUL.Rotate(iRotation);
#endif
// LATER: Since we have an actual rotation angle, we can calculate
// any rotation offset directly (instead of of using m_pRotationOffset)
// (But we are too lazy to do that now)
ASSERT(m_pRotationOffset == NULL);
// Blt
DrawBltRotated(Dest,
x,
y,
iRotation,
*pSource,
xSrc,
m_rcImage.top,
cxSrc,
cySrc);
}
bool CObjectImageArray::PointInImage (int x, int y, int iTick, int iRotation) const
// PointInImage
//
// Returns TRUE if the given point is inside the masked part of the image
// x, y is relative to the center of the image (GDI directions)
{
if (m_pImage)
{
CG16bitImage *pSource = m_pImage->GetImage();
if (pSource == NULL)
return false;
// Compute the position of the frame
int cxWidth = RectWidth(m_rcImage);
int cyHeight = RectHeight(m_rcImage);
int xSrc = ComputeSourceX(iTick);
int ySrc = m_rcImage.top + (iRotation * cyHeight);
// Adjust the point so that it is relative to the
// frame origin (upper left)
x = xSrc + x + (cxWidth / 2);
y = ySrc + y + (cyHeight / 2);
// Adjust for rotation
if (m_pRotationOffset)
{
x -= m_pRotationOffset[iRotation % m_iRotationCount].x;
y += m_pRotationOffset[iRotation % m_iRotationCount].y;
}
// Check bounds
if (x < xSrc || y < ySrc || x >= (xSrc + cxWidth) || y >= (ySrc + cyHeight))
return false;
// Check to see if the point is inside or outside the mask
return (pSource->GetPixelAlpha(x, y) != 0);
}
else
return false;
}
void CObjectImageArray::PaintImage (CG16bitImage &Dest, int x, int y, int iTick, int iRotation) const
// PaintImage
//
// Paints the image on the destination
{
if (m_pImage)
{
CG16bitImage *pSource = m_pImage->GetImage();
if (pSource == NULL)
return;
int xSrc = ComputeSourceX(iTick);
if (m_pRotationOffset)
{
x += m_pRotationOffset[iRotation % m_iRotationCount].x;
y -= m_pRotationOffset[iRotation % m_iRotationCount].y;
}
if (m_iBlending == blendLighten)
{
Dest.BltLighten(xSrc,
m_rcImage.top + (iRotation * RectHeight(m_rcImage)),
RectWidth(m_rcImage),
RectHeight(m_rcImage),
255,
*pSource,
x - (RectWidth(m_rcImage) / 2),
y - (RectHeight(m_rcImage) / 2));
}
else
{
Dest.ColorTransBlt(xSrc,
m_rcImage.top + (iRotation * RectHeight(m_rcImage)),
RectWidth(m_rcImage),
RectHeight(m_rcImage),
255,
*pSource,
x - (RectWidth(m_rcImage) / 2),
y - (RectHeight(m_rcImage) / 2));
}
}
}
void CObjectImageArray::PaintImageUL (CG16bitImage &Dest, int x, int y, int iTick, int iRotation) const
// PaintImageUL
//
// Paints the image. x,y is the upper-left corner of the destination
//
// Note: This should not use the rotation offsets
{
if (m_pImage)
{
CG16bitImage *pSource = m_pImage->GetImage();
if (pSource == NULL)
return;
int xSrc = ComputeSourceX(iTick);
if (m_iBlending == blendLighten)
{
Dest.BltLighten(xSrc,
m_rcImage.top + (iRotation * RectHeight(m_rcImage)),
RectWidth(m_rcImage),
RectHeight(m_rcImage),
255,
*pSource,
x,
y);
}
else
{
Dest.ColorTransBlt(xSrc,
m_rcImage.top + (iRotation * RectHeight(m_rcImage)),
RectWidth(m_rcImage),
RectHeight(m_rcImage),
255,
*pSource,
x,
y);
}
}
}
RECT CObjectImageArray::GetImageRect (int iTick, int iRotation, int *retxCenter, int *retyCenter) const
// GetImageRect
//
// Returns the rect of the image
{
RECT rcRect;
rcRect.left = ComputeSourceX(iTick);
rcRect.right = rcRect.left + RectWidth(m_rcImage);
rcRect.top = m_rcImage.top + (iRotation * RectHeight(m_rcImage));
rcRect.bottom = rcRect.top + RectHeight(m_rcImage);
if (retxCenter)
*retxCenter = rcRect.left + ((RectWidth(m_rcImage) / 2) - (m_pRotationOffset ? m_pRotationOffset[iRotation % m_iRotationCount].x : 0));
if (retyCenter)
*retyCenter = rcRect.top + ((RectHeight(m_rcImage) / 2) + (m_pRotationOffset ? m_pRotationOffset[iRotation % m_iRotationCount].y : 0));
return rcRect;
}
void CObjectImageArray::PaintImage (CG16bitImage &Dest, int x, int y, int iTick, int iRotation, bool srcAlpha) const
// PaintImage
//
// Paints the image on the destination
{
if (m_pImage)
{
CG16bitImage &Source(*m_pImage->GetImage());
int xSrc = ComputeSourceX(iTick);
int ySrc;
if (m_pRotationOffset)
{
x += m_pRotationOffset[iRotation % m_iRotationCount].x;
y -= m_pRotationOffset[iRotation % m_iRotationCount].y;
}
if (m_iBlending == blendLighten)
{
Dest.BltLighten(xSrc,
m_rcImage.top + (iRotation * RectHeight(m_rcImage)),
RectWidth(m_rcImage),
RectHeight(m_rcImage),
255,
Source,
x - (RectWidth(m_rcImage) / 2),
y - (RectHeight(m_rcImage) / 2));
}
else
{
ySrc = m_rcImage.top + (iRotation * RectHeight(m_rcImage));
Dest.Blt(x - (RectWidth(m_rcImage) / 2), y - (RectHeight(m_rcImage) / 2), Source, xSrc,
ySrc, xSrc + RectWidth(m_rcImage), ySrc + RectHeight(m_rcImage), srcAlpha);
}
}
}
void CObjectImageArray::GenerateScaledImages (int iRotation, int cxWidth, int cyHeight) const
// GenerateScaledImages
//
// Generate scaled images
{
ASSERT(iRotation >= 0 && iRotation < m_iRotationCount);
// Allocate the array of images (if not already allocated)
if (m_pScaledImages == NULL)
m_pScaledImages = new CG16bitImage [m_iRotationCount];
// If the image for this rotation has already been initialized, then
// we're done
if (!m_pScaledImages[iRotation].IsEmpty())
return;
// Otherwise we need to create the scaled image
m_pScaledImages[iRotation].Create(cxWidth, cyHeight);
// Get the extent of the source image
RECT rcSrc;
rcSrc.left = ComputeSourceX(0);
rcSrc.top = m_rcImage.top + (iRotation * RectHeight(m_rcImage));
rcSrc.right = rcSrc.left + RectWidth(m_rcImage);
rcSrc.bottom = rcSrc.top + RectHeight(m_rcImage);
// Scale the image
m_pScaledImages[iRotation].BltRotoZ(0, 0, cxWidth, cyHeight,
*m_pImage->GetImage(), rcSrc.left, rcSrc.top, rcSrc.right,
rcSrc.bottom, 0, 0, false);
}
void CObjectImageArray::PointInImageInit (SPointInObjectCtx &Ctx, int iTick, int iRotation) const
// PointInImageInit
//
// Initializes the context to optimize the PointInImage call
{
if (m_pImage)
{
Ctx.pImage = m_pImage->GetImage();
if (Ctx.pImage == NULL)
return;
// Compute the position of the frame
int cxWidth = RectWidth(m_rcImage);
int cyHeight = RectHeight(m_rcImage);
Ctx.rcImage.left = ComputeSourceX(iTick);
Ctx.rcImage.top = m_rcImage.top + (iRotation * cyHeight);
Ctx.rcImage.right = Ctx.rcImage.left + cxWidth;
Ctx.rcImage.bottom = Ctx.rcImage.top + cyHeight;
// Compute the offset required to convert to image coordinates
Ctx.xImageOffset = Ctx.rcImage.left + (cxWidth / 2);
Ctx.yImageOffset = Ctx.rcImage.top + (cyHeight / 2);
// Adjust for rotation
if (m_pRotationOffset)
{
Ctx.xImageOffset -= m_pRotationOffset[iRotation % m_iRotationCount].x;
Ctx.yImageOffset += m_pRotationOffset[iRotation % m_iRotationCount].y;
}
}
}
bool CObjectImageArray::ImagesIntersect (int iTick, int iRotation, int x, int y, const CObjectImageArray &Image2, int iTick2, int iRotation2) const
// ImagesIntersect
//
// Returns TRUE if the given image intersects with this image
{
if (m_pImage == NULL || Image2.m_pImage == NULL)
return false;
// Compute the rectangle of image1
RECT rcRect;
int cxWidth = RectWidth(m_rcImage);
int cyHeight = RectHeight(m_rcImage);
rcRect.left = ComputeSourceX(iTick);
rcRect.top = m_rcImage.top + (iRotation * cyHeight);
rcRect.right = rcRect.left + cxWidth;
rcRect.bottom = rcRect.top + cyHeight;
// Compute the rectangle of image2
RECT rcRect2;
int cxWidth2 = RectWidth(Image2.m_rcImage);
int cyHeight2 = RectHeight(Image2.m_rcImage);
rcRect2.left = Image2.ComputeSourceX(iTick);
rcRect2.top = Image2.m_rcImage.top + (iRotation2 * cyHeight2);
rcRect2.right = rcRect2.left + cxWidth2;
rcRect2.bottom = rcRect2.top + cyHeight2;
// Now figure out the position of image2 on the image1 coordinate space
int xCenter = rcRect.left + (cxWidth / 2);
int yCenter = rcRect.top + (cyHeight / 2);
RECT rcImage2On1;
rcImage2On1.left = xCenter + x - (cxWidth2 / 2);
rcImage2On1.top = yCenter + y - (cyHeight2 / 2);
if (m_pRotationOffset)
{
rcImage2On1.left -= m_pRotationOffset[iRotation % m_iRotationCount].x;
rcImage2On1.top += m_pRotationOffset[iRotation % m_iRotationCount].y;
}
if (Image2.m_pRotationOffset)
{
rcImage2On1.left += Image2.m_pRotationOffset[iRotation2 % Image2.m_iRotationCount].x;
rcImage2On1.top -= Image2.m_pRotationOffset[iRotation2 % Image2.m_iRotationCount].y;
}
rcImage2On1.right = rcImage2On1.left + cxWidth2;
rcImage2On1.bottom = rcImage2On1.top + cyHeight2;
// Intersect the rectangles
RECT rcRectInt;
if (!::IntersectRect(&rcRectInt, &rcRect, &rcImage2On1))
return false;
// Figure out the position of image1 on the image2 coordinate space
int xOffset = rcRect.left - rcImage2On1.left;
int yOffset = rcRect.top - rcImage2On1.top;
RECT rcImage1On2;
rcImage1On2.left = rcRect2.left + xOffset;
rcImage1On2.top = rcRect2.top + yOffset;
rcImage1On2.right = rcImage1On2.left + cxWidth;
rcImage1On2.bottom = rcImage1On2.top + cyHeight;
// Intersect the rectangles
RECT rcRectInt2;
::IntersectRect(&rcRectInt2, &rcRect2, &rcImage1On2);
ASSERT(RectWidth(rcRectInt) == RectWidth(rcRectInt2));
ASSERT(RectHeight(rcRectInt) == RectHeight(rcRectInt2));
// Images
CG16bitImage *pSrc1 = m_pImage->GetImage();
CG16bitImage *pSrc2 = Image2.m_pImage->GetImage();
if (pSrc1 == NULL || pSrc2 == NULL)
return false;
// If both rectangles have a mask
if (pSrc1->HasAlpha() && pSrc2->HasAlpha())
{
// Now iterate over the intersection area and see if there
// are any pixels in common.
BYTE *pRow = pSrc1->GetAlphaRow(rcRectInt.top) + rcRectInt.left;
BYTE *pRowEnd = pSrc1->GetAlphaRow(rcRectInt.bottom) + rcRectInt.left;
BYTE *pRow2 = pSrc2->GetAlphaRow(rcRectInt2.top) + rcRectInt2.left;
int cxWidthInt = RectWidth(rcRectInt);
while (pRow < pRowEnd)
{
BYTE *pPos = pRow;
BYTE *pEnd = pPos + cxWidthInt;
BYTE *pPos2 = pRow2;
while (pPos < pEnd)
{
if (*pPos && *pPos2)
return true;
pPos++;
pPos2++;
}
pRow = pSrc1->NextAlphaRow(pRow);
pRow2 = pSrc2->NextAlphaRow(pRow2);
}
}
// If neither has a mask
else if (!pSrc1->HasAlpha() && !pSrc2->HasAlpha())
{
// Now iterate over the intersection area and see if there
// are any pixels in common.
WORD *pRow = pSrc1->GetRowStart(rcRectInt.top) + rcRectInt.left;
WORD *pRowEnd = pSrc1->GetRowStart(rcRectInt.bottom) + rcRectInt.left;
WORD *pRow2 = pSrc2->GetRowStart(rcRectInt2.top) + rcRectInt2.left;
WORD wBackColor = pSrc1->GetBackColor();
int cxWidthInt = RectWidth(rcRectInt);
while (pRow < pRowEnd)
{
WORD *pPos = pRow;
WORD *pEnd = pPos + cxWidthInt;
WORD *pPos2 = pRow2;
while (pPos < pEnd)
{
if (*pPos != wBackColor && *pPos2 != wBackColor)
return true;
pPos++;
pPos2++;
}
pRow = pSrc1->NextRow(pRow);
pRow2 = pSrc2->NextRow(pRow2);
}
}
// Don't know how to handle this case
else
return true;
// If we get this far then we did not intersect
return false;
}
void CObjectImageArray::GenerateGlowImage (int iRotation) const
// GenerateGlowImage
//
// Generates a mask that looks like a glow. The mask is 0 for all image pixels
// and for all pixels where there is no glow (thus we can optimize painting
// of the glow by ignoring 0 values)
{
ASSERT(iRotation >= 0 && iRotation < m_iRotationCount);
// Source
if (m_pImage == NULL)
return;
CG16bitImage *pSource = m_pImage->GetImage();
if (pSource == NULL)
return;
// Allocate the array of images (if not already allocated)
if (m_pGlowImages == NULL)
m_pGlowImages = new CG16bitImage [m_iRotationCount];
// If the image for this rotation has already been initialized, then
// we're done
if (m_pGlowImages[iRotation].HasAlpha())
return;
// Otherwise we need to create the glow mask. The glow image is larger
// than the object image (by GLOW_SIZE)
int cxSrcWidth = RectWidth(m_rcImage);
int cySrcHeight = RectHeight(m_rcImage);
int cxGlowWidth = cxSrcWidth + 2 * GLOW_SIZE;
int cyGlowHeight = cySrcHeight + 2 * GLOW_SIZE;
m_pGlowImages[iRotation].CreateBlankAlpha(cxGlowWidth, cyGlowHeight);
// Get the extent of the source image
RECT rcSrc;
rcSrc.left = ComputeSourceX(0);
rcSrc.top = m_rcImage.top + (iRotation * cySrcHeight);
rcSrc.right = rcSrc.left + cxSrcWidth;
rcSrc.bottom = rcSrc.top + cySrcHeight;
// Loop over every pixel of the destination
BYTE *pDestRow = m_pGlowImages[iRotation].GetAlphaRow(0);
BYTE *pDestRowEnd = m_pGlowImages[iRotation].GetAlphaRow(cyGlowHeight);
int ySrc = rcSrc.top - GLOW_SIZE;
while (pDestRow < pDestRowEnd)
{
BYTE *pDest = pDestRow;
BYTE *pDestEnd = pDest + cxGlowWidth;
int xSrc = rcSrc.left - GLOW_SIZE;
while (pDest < pDestEnd)
{
// If the source image is using this pixel then we don't
// do anything.
WORD wValue;
if ((xSrc >= rcSrc.left && xSrc < rcSrc.right && ySrc >= rcSrc.top && ySrc < rcSrc.bottom)
&& ((wValue = *(pSource->GetRowStart(ySrc) + xSrc)) != 0x0000))
{
DWORD dwGray = (CG16bitImage::RedValue(wValue)
+ CG16bitImage::GreenValue(wValue)
+ CG16bitImage::BlueValue(wValue)) / 3;
if (dwGray < 0x40)
*pDest = 0x60;
else
*pDest = 0x00;
}
// Otherwise we process the pixel
else
{
int xStart = (rcSrc.left > (xSrc - GLOW_SIZE) ? ((rcSrc.left - (xSrc - GLOW_SIZE) + (GLOW_SIZE / 2 - 1)) / (GLOW_SIZE / 2)) : 0);
int xEnd = ((xSrc + GLOW_SIZE) >= rcSrc.right ? (FILTER_SIZE - (((GLOW_SIZE / 2 + 1) + xSrc + GLOW_SIZE - rcSrc.right) / (GLOW_SIZE / 2))) : FILTER_SIZE);
int yStart = (rcSrc.top > (ySrc - GLOW_SIZE) ? ((rcSrc.top - (ySrc - GLOW_SIZE) + (GLOW_SIZE / 2 - 1)) / (GLOW_SIZE / 2)) : 0);
int yEnd = ((ySrc + GLOW_SIZE) >= rcSrc.bottom ? (FILTER_SIZE - (((GLOW_SIZE / 2 + 1) + ySrc + GLOW_SIZE - rcSrc.bottom) / (GLOW_SIZE / 2))) : FILTER_SIZE);
int iTotal = 0;
for (int i = yStart; i < yEnd; i++)
for (int j = xStart; j < xEnd; j++)
if (*(pSource->GetRowStart(ySrc + g_FilterOffset[i]) + xSrc + g_FilterOffset[j]) != 0x0000)
iTotal += g_Filter[i][j];
int iValue = (512 * iTotal / FIXED_POINT);
*pDest = (iValue > 0xf8 ? 0xf8 : (BYTE)iValue);
}
// Next
pDest++;
xSrc++;
}
pDestRow = m_pGlowImages[iRotation].NextAlphaRow(pDestRow);
ySrc++;
}
}
bool CObjectImageArray::ImagesIntersect (int iTick, int iRotation, int x, int y, const CObjectImageArray &Image2, int iTick2, int iRotation2) const
// ImagesIntersect
//
// Returns TRUE if the given image intersects with this image
{
if (m_pImage == NULL || Image2.m_pImage == NULL)
return false;
// Compute the rectangle of image1
RECT rcRect;
int cxWidth = RectWidth(m_rcImage);
int cyHeight = RectHeight(m_rcImage);
rcRect.left = ComputeSourceX(iTick);
rcRect.top = m_rcImage.top + (iRotation * cyHeight);
rcRect.right = rcRect.left + cxWidth;
rcRect.bottom = rcRect.top + cyHeight;
// Compute the rectangle of image2
RECT rcRect2;
int cxWidth2 = RectWidth(Image2.m_rcImage);
int cyHeight2 = RectHeight(Image2.m_rcImage);
rcRect2.left = Image2.ComputeSourceX(iTick);
rcRect2.top = Image2.m_rcImage.top + (iRotation2 * cyHeight2);
rcRect2.right = rcRect2.left + cxWidth2;
rcRect2.bottom = rcRect2.top + cyHeight2;
// Now figure out the position of image2 on the image1 coordinate space
int xCenter = rcRect.left + (cxWidth / 2);
int yCenter = rcRect.top + (cyHeight / 2);
RECT rcImage2On1;
rcImage2On1.left = xCenter + x - (cxWidth2 / 2);
rcImage2On1.top = yCenter + y - (cyHeight2 / 2);
if (m_pRotationOffset)
{
rcImage2On1.left -= m_pRotationOffset[iRotation % m_iRotationCount].x;
rcImage2On1.top += m_pRotationOffset[iRotation % m_iRotationCount].y;
}
if (Image2.m_pRotationOffset)
{
rcImage2On1.left += Image2.m_pRotationOffset[iRotation2 % Image2.m_iRotationCount].x;
rcImage2On1.top -= Image2.m_pRotationOffset[iRotation2 % Image2.m_iRotationCount].y;
}
rcImage2On1.right = rcImage2On1.left + cxWidth2;
rcImage2On1.bottom = rcImage2On1.top + cyHeight2;
// Intersect the rectangles
RECT rcRectInt;
if (!::IntersectRect(&rcRectInt, &rcRect, &rcImage2On1))
return false;
// Figure out the position of image1 on the image2 coordinate space
int xOffset = rcRect.left - rcImage2On1.left;
int yOffset = rcRect.top - rcImage2On1.top;
RECT rcImage1On2;
rcImage1On2.left = rcRect2.left + xOffset;
rcImage1On2.top = rcRect2.top + yOffset;
rcImage1On2.right = rcImage1On2.left + cxWidth;
rcImage1On2.bottom = rcImage1On2.top + cyHeight;
// Intersect the rectangles
RECT rcRectInt2;
::IntersectRect(&rcRectInt2, &rcRect2, &rcImage1On2);
ASSERT(RectWidth(rcRectInt) == RectWidth(rcRectInt2));
ASSERT(RectHeight(rcRectInt) == RectHeight(rcRectInt2));
// Images
CG16bitImage &Src1(*m_pImage->GetImage());
CG16bitImage &Src2(*Image2.m_pImage->GetImage());
return Src1.Intersect(rcRectInt.left, rcRectInt.top, rcRectInt.right, rcRectInt.bottom, Src2, rcRectInt2.left, rcRectInt2.top);
}
