From 3d4da65ace3313d3dfe90e214a8a20bfa1266189 Mon Sep 17 00:00:00 2001
From: "pavlov%netscape.com"
 <pavlov%netscape.com@18797224-902f-48f8-a5cc-f745e15eee43>
Date: Mon, 12 Feb 2001 05:03:20 +0000
Subject: [PATCH] windows stretching code

git-svn-id: svn://10.0.0.236/branches/IMGLIB2_20010126_BRANCH@86803 18797224-902f-48f8-a5cc-f745e15eee43
---
 mozilla/gfx2/src/windows/nsImageContainer.cpp | 13 +++++
 mozilla/gfx2/src/windows/nsImageFrame.cpp     | 50 +++++++++++++++++++
 mozilla/gfx2/src/windows/nsImageFrame.h       |  1 +
 .../src/windows/nsPIImageContainerWin.idl     |  1 +
 4 files changed, 65 insertions(+)

diff --git a/mozilla/gfx2/src/windows/nsImageContainer.cpp b/mozilla/gfx2/src/windows/nsImageContainer.cpp
index b5783430239..43e1c240617 100644
--- a/mozilla/gfx2/src/windows/nsImageContainer.cpp
+++ b/mozilla/gfx2/src/windows/nsImageContainer.cpp
@@ -144,4 +144,17 @@ NS_IMETHODIMP nsImageContainer::DrawImage(HDC aDestDC, const nsRect * aSrcRect,
     return rv;
 
   return NS_REINTERPRET_CAST(nsImageFrame*, img.get())->DrawImage(aDestDC, aSrcRect, aDestPoint);
+}
+
+NS_IMETHODIMP nsImageContainer::DrawScaledImage(HDC aDestDC, const nsRect * aSrcRect, const nsRect * aDestRect)
+{
+  nsresult rv;
+
+  nsCOMPtr<nsIImageFrame> img;
+  rv = this->GetCurrentFrame(getter_AddRefs(img));
+
+  if (NS_FAILED(rv))
+    return rv;
+
+  return NS_REINTERPRET_CAST(nsImageFrame*, img.get())->DrawScaledImage(aDestDC, aSrcRect, aDestRect);
 }
\ No newline at end of file
diff --git a/mozilla/gfx2/src/windows/nsImageFrame.cpp b/mozilla/gfx2/src/windows/nsImageFrame.cpp
index 9376d78f2ae..6324fded703 100644
--- a/mozilla/gfx2/src/windows/nsImageFrame.cpp
+++ b/mozilla/gfx2/src/windows/nsImageFrame.cpp
@@ -23,6 +23,8 @@
 
 #include "nsImageFrame.h"
 
+#include "nsTransform2D.h"
+
 NS_IMPL_ISUPPORTS1(nsImageFrame, nsIImageFrame)
 
 
@@ -428,3 +430,51 @@ nsresult nsImageFrame::DrawImage(HDC aDestDC, const nsRect * aSrcRect, const nsP
 
 }
 
+
+nsresult nsImageFrame::DrawScaledImage(HDC aDestDC, const nsRect * aSrcRect, const nsRect * aDestRect)
+{
+  LPBITMAPINFOHEADER mBHead = (LPBITMAPINFOHEADER)new char[sizeof(BITMAPINFO)];
+
+  nsTransform2D trans;
+  trans.SetToScale((float(mRect.width) / float(aDestRect->width)), (float(mRect.height) / float(aDestRect->height)));
+
+  nsRect source(*aSrcRect);
+  nsRect dest(*aDestRect);
+
+  trans.TransformCoord(&source.x, &source.y, &source.width, &source.height);
+//  trans.TransformCoord(&dest.x, &dest.y, &dest.width, &dest.height);
+
+  mBHead->biSize = sizeof(BITMAPINFOHEADER);
+	mBHead->biWidth = mRect.width;
+	mBHead->biHeight = -source.height;
+	mBHead->biPlanes = 1;
+	mBHead->biBitCount = 24;
+	mBHead->biCompression = BI_RGB;
+	mBHead->biSizeImage = mImageData.length;
+	mBHead->biXPelsPerMeter = 0;
+	mBHead->biYPelsPerMeter = 0;
+	mBHead->biClrUsed = 0;
+	mBHead->biClrImportant = 0;
+
+  int rop = SRCCOPY;
+  if (mAlphaData && mAlphaData->depth == 1) {
+    MONOBITMAPINFO bmi(mRect.width, -source.height);
+    bmi.bmiHeader.biSizeImage = mAlphaData->length;
+    ::StretchDIBits(aDestDC, (aDestRect->x + aSrcRect->x), (aDestRect->y + aSrcRect->y), dest.width, dest.height,
+                    source.x, 0, mRect.width, source.height,
+                    mAlphaData->data + (source.y * mAlphaData->bytesPerRow), 
+                    (LPBITMAPINFO)&bmi, DIB_RGB_COLORS, SRCAND);
+    rop = SRCPAINT;
+  }
+
+  ::StretchDIBits(aDestDC, (aDestRect->x + aSrcRect->x), (aDestRect->y + aSrcRect->y), dest.width, dest.height,
+                  source.x, 0, mRect.width, source.height,
+                  mImageData.data + (source.y * mImageData.bytesPerRow), 
+                  (LPBITMAPINFO)mBHead, DIB_RGB_COLORS, rop);
+
+  delete[] mBHead;
+
+  return NS_OK;
+
+}
+
diff --git a/mozilla/gfx2/src/windows/nsImageFrame.h b/mozilla/gfx2/src/windows/nsImageFrame.h
index 1e1f7ebd13d..ab43218c75f 100644
--- a/mozilla/gfx2/src/windows/nsImageFrame.h
+++ b/mozilla/gfx2/src/windows/nsImageFrame.h
@@ -61,6 +61,7 @@ public:
 
 
   nsresult DrawImage(HDC aDestDC, const nsRect * aSrcRect, const nsPoint * aDestPoint);
+  nsresult DrawScaledImage(HDC aDestDC, const nsRect * aSrcRect, const nsRect * aDestRect);
 
 
 private:
diff --git a/mozilla/gfx2/src/windows/nsPIImageContainerWin.idl b/mozilla/gfx2/src/windows/nsPIImageContainerWin.idl
index e59131ff279..6e4122d31c5 100644
--- a/mozilla/gfx2/src/windows/nsPIImageContainerWin.idl
+++ b/mozilla/gfx2/src/windows/nsPIImageContainerWin.idl
@@ -46,4 +46,5 @@ interface nsPIImageContainerWin : nsISupports
   /**
    */
   void drawImage(in HDC aDestDC, [const] in nsRect aSrcRect, [const] in nsPoint aDestPoint);
+  void drawScaledImage(in HDC aDestDC, [const] in nsRect aSrcRect, [const] in nsRect aDestRect);
 };