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#158472

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r=dainis, sr=blizzard - platform specific
OS/2 only - handle transparency better when printing


git-svn-id: svn://10.0.0.236/trunk@127188 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
mkaply%us.ibm.com
2002-08-13 18:44:34 +00:00
parent fbe40219c9
commit 98cd85cf87
1 changed files with 104 additions and 19 deletions
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123
mozilla/gfx/src/os2/nsImageOS2.cpp
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@@ -31,6 +31,7 @@
#include "nsImageOS2.h"
#include "nsRenderingContextOS2.h"
#include "nsDeviceContextOS2.h"
#define MAX_BUFFER_WIDTH 128
#define MAX_BUFFER_HEIGHT 128
@@ -309,26 +310,110 @@ nsImageOS2 :: Draw(nsIRenderingContext &aContext, nsDrawingSurface aSurface,
}
else if( mAlphaDepth == 1)
{
// > The transparent areas of the mask are coloured black (0).
// > the transparent areas of the pixmap are coloured black (0).
// > Note this does *not* mean that all black pels are transparent!
// >
// > Thus all we need to do is AND the mask onto the target, taking
// > out pels that are not transparent, and then OR the image onto
// > the target.
// >
// > For monochrome bitmaps GPI replaces 1 with IMAGEBUNDLE foreground
// > color and 0 with background color. To make this work with ROP_SRCAND
// > we set foreground to black and background to white. Thus AND with
// > 1 (opaque) in mask maps to AND with IMAGEBUNDLE foreground (which is 0)
// > always gives 0 - clears opaque region to zeros.
PRBool fPrinting = PR_FALSE;
nsIDeviceContext* context;
aContext.GetDeviceContext(context);
if (((nsDeviceContextOS2 *)context)->mPrintDC) {
fPrinting = PR_TRUE;
}
if (!fPrinting) {
// > The transparent areas of the mask are coloured black (0).
// > the transparent areas of the pixmap are coloured black (0).
// > Note this does *not* mean that all black pels are transparent!
// >
// > Thus all we need to do is AND the mask onto the target, taking
// > out pels that are not transparent, and then OR the image onto
// > the target.
// >
// > For monochrome bitmaps GPI replaces 1 with IMAGEBUNDLE foreground
// > color and 0 with background color. To make this work with ROP_SRCAND
// > we set foreground to black and background to white. Thus AND with
// > 1 (opaque) in mask maps to AND with IMAGEBUNDLE foreground (which is 0)
// > always gives 0 - clears opaque region to zeros.
// Apply mask to target, clear pels we will fill in from the image
MONOBITMAPINFO MaskBitmapInfo (mInfo);
GFX (::GpiDrawBits (surf->GetPS (), mAlphaBits, MaskBitmapInfo, 4, aptl, ROP_SRCAND, BBO_IGNORE), GPI_ERROR);
// Now combine image with target
GFX (::GpiDrawBits (surf->GetPS (), mImageBits, mInfo, 4, aptl, ROP_SRCPAINT, BBO_IGNORE), GPI_ERROR);
} else {
// Find the compatible device context and create a memory one
HDC hdcCompat = GFX (::GpiQueryDevice (surf->GetPS ()), HDC_ERROR);
rv = NS_ERROR_FAILURE;
// create non-inclusive rect for GpiBitBlt
RECTL dest;
surf->NS2PM_INEX (trect, dest);
DEVOPENSTRUC dop = { 0, 0, 0, 0, 0 };
HDC MemDC = ::DevOpenDC( (HAB)0, OD_MEMORY, "*", 5, (PDEVOPENDATA) &dop, hdcCompat);
if( MemDC != DEV_ERROR )
{
// create the PS
SIZEL sizel = { 0, 0 };
HPS MemPS = GFX (::GpiCreatePS (0, MemDC, &sizel, PU_PELS | GPIT_MICRO | GPIA_ASSOC), GPI_ERROR);
if( MemPS != GPI_ERROR )
{
GFX (::GpiCreateLogColorTable (MemPS, 0, LCOLF_RGB, 0, 0, 0), FALSE);
// now create a bitmap of the right size
HBITMAP hMemBmp;
BITMAPINFOHEADER2 bihMem = { 0 };
bihMem.cbFix = sizeof (BITMAPINFOHEADER2);
bihMem.cx = aSWidth;
bihMem.cy = aSHeight;
bihMem.cPlanes = 1;
LONG lBitCount = 0;
GFX (::DevQueryCaps( hdcCompat, CAPS_COLOR_BITCOUNT, 1, &lBitCount), FALSE);
bihMem.cBitCount = (USHORT) lBitCount;
hMemBmp = GFX (::GpiCreateBitmap (MemPS, &bihMem, 0, 0, 0), GPI_ERROR);
if( hMemBmp != GPI_ERROR )
{
GFX (::GpiSetBitmap (MemPS, hMemBmp), HBM_ERROR);
// Apply mask to target, clear pels we will fill in from the image
MONOBITMAPINFO MaskBitmapInfo (mInfo);
GFX (::GpiDrawBits (surf->GetPS (), mAlphaBits, MaskBitmapInfo, 4, aptl, ROP_SRCAND, BBO_IGNORE), GPI_ERROR);
// Now combine image with target
GFX (::GpiDrawBits (surf->GetPS (), mImageBits, mInfo, 4, aptl, ROP_SRCPAINT, BBO_IGNORE), GPI_ERROR);
GpiErase(MemPS);
// Now combine image with target
// Set up blit coord array
POINTL aptlNew[ 4] = { { 0, 0 }, // TLL
{ bihMem.cx, bihMem.cy }, // TUR
{ aSX, mInfo->cy - (aSY + aSHeight) }, // SLL
{ aSX + aSWidth, mInfo->cy - aSY } }; // SUR
// Apply mask to target, clear pels we will fill in from the image
MONOBITMAPINFO MaskBitmapInfo (mInfo);
GFX (::GpiDrawBits (MemPS, mAlphaBits, MaskBitmapInfo, 4, aptlNew, ROP_SRCAND, BBO_IGNORE), GPI_ERROR);
// Now combine image with target
GFX (::GpiDrawBits (MemPS, mImageBits, mInfo, 4, aptlNew, ROP_SRCPAINT, BBO_IGNORE), GPI_ERROR);
// Transfer bitmap from memory bitmap back to device
POINTL aptlMemToDev [4] = { dest.xLeft, dest.yBottom, // TLL - device (Dx1, Dy2)
dest.xRight, dest.yTop, // TUR - device (Dx2, Dy1)
0, 0, // SLL - mem bitmap (0, 0)
bihMem.cx, bihMem.cy}; // SUR - mem bitmap (cx, cy)
GFX (::GpiBitBlt (surf->GetPS (), MemPS, 4, aptlMemToDev, ROP_SRCCOPY, BBO_IGNORE), GPI_ERROR);
rv = NS_OK;
GFX (::GpiSetBitmap (MemPS, NULLHANDLE), HBM_ERROR);
GFX (::GpiDeleteBitmap (hMemBmp), FALSE);
}
GFX (::GpiDestroyPS (MemPS), FALSE);
}
::DevCloseDC (MemDC);
}
}
} else
{
// Find the compatible device context and create a memory one