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#230200

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r=mkaply, sr=blizzard (platform specific), a=mkaply
OS/2 code from Lee Tartak - better image tiling code
This commit is contained in:
mkaply%us.ibm.com 2004-01-08 17:48:58 +00:00
parent c958ba37b1
commit 13779086a9
2 changed files with 127 additions and 159 deletions
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283
gfx/src/os2/nsImageOS2.cpp
View File

@ -422,7 +422,7 @@ nsImageOS2 :: Draw(nsIRenderingContext &aContext, nsDrawingSurface aSurface,
POINTL aptlNew[ 4] = { { 0, 0 }, // TLL
{ bihMem.cx, bihMem.cy }, // TUR
{ aSX, mInfo->cy - (aSY + aSHeight) }, // SLL
{ aSX + aSWidth + 1, mInfo->cy - aSY + 1 } }; // SUR
{ aSX + aSWidth+1, mInfo->cy - aSY+1 } }; // SUR
// Apply mask to target, clear pels we will fill in from the image
MONOBITMAPINFO MaskBitmapInfo (mInfo);
@ -630,7 +630,7 @@ nsImageOS2::UnlockImagePixels(PRBool aMaskPixels)
void
nsImageOS2::BuildTile (HPS hpsTile, PRUint8* pImageBits, PBITMAPINFO2 pBitmapInfo,
nscoord aTileWidth, nscoord aTileHeight)
nscoord aTileWidth, nscoord aTileHeight, float scale)
{
// If bitmap not fully loaded, then first fill area with background color.
if (nsRect (0, 0, mInfo->cx, mInfo->cy) != mDecodedRect)
@ -653,11 +653,17 @@ nsImageOS2::BuildTile (HPS hpsTile, PRUint8* pImageBits, PBITMAPINFO2 pBitmapInf
mDecodedRect.x, mDecodedRect.y, // SLL - in
mDecodedRect.XMost (), mDecodedRect.YMost () }; // SUR - ex
// Scale up
aptl[0].x *= scale;
aptl[0].y *= scale;
aptl[1].x = (mDecodedRect.XMost() * scale) - 1;
aptl[1].y = (mDecodedRect.YMost() * scale) - 1;
// Draw bitmap once into temporary PS
GFX (::GpiDrawBits (hpsTile, (PBYTE)pImageBits, pBitmapInfo, 4, aptl, ROP_SRCCOPY, BBO_IGNORE), GPI_ERROR);
PRInt32 DestWidth = mInfo->cx;
PRInt32 DestHeight = mInfo->cy;
PRInt32 DestWidth = mInfo->cx * scale;
PRInt32 DestHeight = mInfo->cy * scale;
// Copy bitmap horizontally, doubling each time
while (DestWidth < aTileWidth)
@ -697,7 +703,7 @@ NS_IMETHODIMP nsImageOS2::DrawTile(nsIRenderingContext &aContext,
PRBool didTile = PR_FALSE;
PRInt32 ImageWidth = mInfo->cx;
PRInt32 ImageHeight = mInfo->cy;
// Get the scale - if greater than 1 then do slow tile which
nsIDeviceContext *theDeviceContext;
float scale;
@ -707,6 +713,8 @@ NS_IMETHODIMP nsImageOS2::DrawTile(nsIRenderingContext &aContext,
nsRect ValidRect (0, 0, ImageWidth, ImageHeight);
ValidRect.IntersectRect (ValidRect, mDecodedRect);
PRInt32 DestScaledWidth = PR_MAX(PRInt32(ValidRect.width * scale), 1);
PRInt32 DestScaledHeight = PR_MAX(PRInt32(ValidRect.height * scale), 1);
nsRect DrawRect = aTileRect;
DrawRect.MoveBy (-aSXOffset, -aSYOffset);
@ -714,180 +722,141 @@ NS_IMETHODIMP nsImageOS2::DrawTile(nsIRenderingContext &aContext,
// Don't bother tiling if we only have to draw the bitmap a couple of times
// Can't tile with 8bit alpha masks because need access destination bitmap values
if ((scale > 1.0) ||
(ImageWidth > DrawRect.width / 2 && ImageHeight > DrawRect.height / 2) ||
(ImageWidth > MAX_BUFFER_WIDTH) || (ImageHeight > MAX_BUFFER_HEIGHT) ||
mAlphaDepth > 1)
return SlowTile (aContext, aSurface, aSXOffset, aSYOffset, aTileRect);
nsDrawingSurfaceOS2 *surf = (nsDrawingSurfaceOS2*) aSurface;
// Find the compatible device context and create a memory one
HDC hdcCompat = GFX (::GpiQueryDevice (surf->GetPS ()), HDC_ERROR);
DEVOPENSTRUC dop = { 0, 0, 0, 0, 0 };
HDC MemDC = GFX (::DevOpenDC( (HAB)0, OD_MEMORY, "*", 5, (PDEVOPENDATA) &dop, hdcCompat), DEV_ERROR);
if( DEV_ERROR != MemDC)
if ((ImageWidth < DrawRect.width / 2 || ImageHeight < DrawRect.height / 2) &&
(ImageWidth <= MAX_BUFFER_WIDTH) && (ImageHeight <= MAX_BUFFER_HEIGHT) &&
mAlphaDepth <= 1)
{
// create the PS
SIZEL sizel = { 0, 0 };
HPS MemPS = GFX (::GpiCreatePS (0, MemDC, &sizel, PU_PELS | GPIT_MICRO | GPIA_ASSOC), GPI_ERROR);
nsDrawingSurfaceOS2 *surf = (nsDrawingSurfaceOS2*) aSurface;
if( GPI_ERROR != MemPS)
// Find the compatible device context and create a memory one
HDC hdcCompat = GFX (::GpiQueryDevice (surf->GetPS ()), HDC_ERROR);
DEVOPENSTRUC dop = { 0, 0, 0, 0, 0 };
HDC MemDC = GFX (::DevOpenDC( (HAB)0, OD_MEMORY, "*", 5, (PDEVOPENDATA) &dop, hdcCompat), DEV_ERROR);
if( DEV_ERROR != MemDC)
{
GFX (::GpiCreateLogColorTable (MemPS, 0, LCOLF_RGB, 0, 0, 0), FALSE);
// create the PS
SIZEL sizel = { 0, 0 };
HPS MemPS = GFX (::GpiCreatePS (0, MemDC, &sizel, PU_PELS | GPIT_MICRO | GPIA_ASSOC), GPI_ERROR);
// now create a bitmap of the right size
BITMAPINFOHEADER2 hdr = { 0 };
hdr.cbFix = sizeof( BITMAPINFOHEADER2);
// Maximum size of tiled area (could do this better)
PRInt32 endWidth = ImageWidth;
while( endWidth < DrawRect.width)
endWidth *= 2;
PRInt32 endHeight = ImageHeight;
while( endHeight < DrawRect.height)
endHeight *= 2;
hdr.cx = endWidth;
hdr.cy = endHeight;
hdr.cPlanes = 1;
// find bitdepth
LONG lBitCount = 0;
GFX (::DevQueryCaps( hdcCompat, CAPS_COLOR_BITCOUNT, 1, &lBitCount), FALSE);
hdr.cBitCount = (USHORT) lBitCount;
RECTL rcl;
surf->NS2PM_INEX (aTileRect, rcl);
POINTL aptlTile [3] = { rcl.xLeft, rcl.yBottom, // TLL - in
rcl.xRight, rcl.yTop, // TUR - ex
aSXOffset, endHeight - aTileRect.height - aSYOffset }; // SLL - in
HBITMAP hMemBmp = GFX (::GpiCreateBitmap (MemPS, &hdr, 0, 0, 0), GPI_ERROR);
if (hMemBmp != GPI_ERROR)
if( GPI_ERROR != MemPS)
{
LONG ImageROP = ROP_SRCCOPY;
GFX (::GpiCreateLogColorTable (MemPS, 0, LCOLF_RGB, 0, 0, 0), FALSE);
GFX (::GpiSetBitmap (MemPS, hMemBmp), HBM_ERROR);
// now create a bitmap of the right size
BITMAPINFOHEADER2 hdr = { 0 };
if (mAlphaDepth == 1)
hdr.cbFix = sizeof( BITMAPINFOHEADER2);
// Maximum size of tiled area (could do this better)
PRInt32 endWidth = DestScaledWidth;
while( endWidth < DrawRect.width)
endWidth *= 2;
PRInt32 endHeight = DestScaledHeight;
while( endHeight < DrawRect.height)
endHeight *= 2;
hdr.cx = endWidth;
hdr.cy = endHeight;
hdr.cPlanes = 1;
// find bitdepth
LONG lBitCount = 0;
GFX (::DevQueryCaps( hdcCompat, CAPS_COLOR_BITCOUNT, 1, &lBitCount), FALSE);
hdr.cBitCount = (USHORT) lBitCount;
RECTL rcl;
surf->NS2PM_INEX (aTileRect, rcl);
POINTL aptlTile [3] = { rcl.xLeft, rcl.yBottom, // TLL - in
rcl.xRight, rcl.yTop, // TUR - ex
aSXOffset, endHeight - aTileRect.height - aSYOffset }; // SLL - in
// For some reason offset does not work well with scaled output
if (scale > 1.0)
{
LONG BlackColor = GFX (::GpiQueryColorIndex (MemPS, 0, MK_RGB (0x00, 0x00, 0x00)), GPI_ALTERROR); // CLR_BLACK;
LONG WhiteColor = GFX (::GpiQueryColorIndex (MemPS, 0, MK_RGB (0xFF, 0xFF, 0xFF)), GPI_ALTERROR); // CLR_WHITE;
// WORKAROUND:
// PostScript drivers up to version 30.732 have problems with GpiQueryColorIndex.
// If we are in LCOL_RGB mode it doesn't return passed RGB color but returns error instead.
if (BlackColor == GPI_ALTERROR) BlackColor = MK_RGB (0x00, 0x00, 0x00);
if (WhiteColor == GPI_ALTERROR) WhiteColor = MK_RGB (0xFF, 0xFF, 0xFF);
// Set image foreground and background colors. These are used in transparent images for blitting 1-bit masks.
// To invert colors on ROP_SRCAND we map 1 to black and 0 to white
IMAGEBUNDLE ib;
ib.lColor = BlackColor; // map 1 in mask to 0x000000 (black) in destination
ib.lBackColor = WhiteColor; // map 0 in mask to 0xFFFFFF (white) in destination
ib.usMixMode = FM_OVERPAINT;
ib.usBackMixMode = BM_OVERPAINT;
GFX (::GpiSetAttrs (MemPS, PRIM_IMAGE, IBB_COLOR | IBB_BACK_COLOR | IBB_MIX_MODE | IBB_BACK_MIX_MODE, 0, (PBUNDLE)&ib), FALSE);
MONOBITMAPINFO MaskBitmapInfo (mInfo);
BuildTile (MemPS, mAlphaBits, MaskBitmapInfo, DrawRect.width, DrawRect.height);
// Apply mask to target, clear pels we will fill in from the image
GFX (::GpiBitBlt (surf->GetPS (), MemPS, 3, aptlTile, ROP_SRCAND, 0L), GPI_ERROR);
ImageROP = ROP_SRCPAINT; // Original image must be combined with mask
aptlTile[2].x = 0;
aptlTile[2].y = endHeight - aTileRect.height;
}
HBITMAP hMemBmp = GFX (::GpiCreateBitmap (MemPS, &hdr, 0, 0, 0), GPI_ERROR);
if (hMemBmp != GPI_ERROR)
{
LONG ImageROP = ROP_SRCCOPY;
GFX (::GpiSetBitmap (MemPS, hMemBmp), HBM_ERROR);
BuildTile (MemPS, mImageBits, mInfo, DrawRect.width, DrawRect.height);
if (mAlphaDepth == 1)
{
LONG BlackColor = GFX (::GpiQueryColorIndex (MemPS, 0, MK_RGB (0x00, 0x00, 0x00)), GPI_ALTERROR); // CLR_BLACK;
LONG WhiteColor = GFX (::GpiQueryColorIndex (MemPS, 0, MK_RGB (0xFF, 0xFF, 0xFF)), GPI_ALTERROR); // CLR_WHITE;
GFX (::GpiBitBlt (surf->GetPS (), MemPS, 3, aptlTile, ImageROP, 0L), GPI_ERROR);
// WORKAROUND:
// PostScript drivers up to version 30.732 have problems with GpiQueryColorIndex.
// If we are in LCOL_RGB mode it doesn't return passed RGB color but returns error instead.
didTile = PR_TRUE;
if (BlackColor == GPI_ALTERROR) BlackColor = MK_RGB (0x00, 0x00, 0x00);
if (WhiteColor == GPI_ALTERROR) WhiteColor = MK_RGB (0xFF, 0xFF, 0xFF);
// Must deselect bitmap from PS before freeing bitmap and PS.
GFX (::GpiSetBitmap (MemPS, NULLHANDLE), HBM_ERROR);
GFX (::GpiDeleteBitmap (hMemBmp), FALSE);
// Set image foreground and background colors. These are used in transparent images for blitting 1-bit masks.
// To invert colors on ROP_SRCAND we map 1 to black and 0 to white
IMAGEBUNDLE ib;
ib.lColor = BlackColor; // map 1 in mask to 0x000000 (black) in destination
ib.lBackColor = WhiteColor; // map 0 in mask to 0xFFFFFF (white) in destination
ib.usMixMode = FM_OVERPAINT;
ib.usBackMixMode = BM_OVERPAINT;
GFX (::GpiSetAttrs (MemPS, PRIM_IMAGE, IBB_COLOR | IBB_BACK_COLOR | IBB_MIX_MODE | IBB_BACK_MIX_MODE, 0, (PBUNDLE)&ib), FALSE);
MONOBITMAPINFO MaskBitmapInfo (mInfo);
BuildTile (MemPS, mAlphaBits, MaskBitmapInfo, DrawRect.width, DrawRect.height, scale);
// Apply mask to target, clear pels we will fill in from the image
GFX (::GpiBitBlt (surf->GetPS (), MemPS, 3, aptlTile, ROP_SRCAND, 0L), GPI_ERROR);
ImageROP = ROP_SRCPAINT; // Original image must be combined with mask
}
BuildTile (MemPS, mImageBits, mInfo, DrawRect.width, DrawRect.height, scale);
GFX (::GpiBitBlt (surf->GetPS (), MemPS, 3, aptlTile, ImageROP, 0L), GPI_ERROR);
didTile = PR_TRUE;
// Must deselect bitmap from PS before freeing bitmap and PS.
GFX (::GpiSetBitmap (MemPS, NULLHANDLE), HBM_ERROR);
GFX (::GpiDeleteBitmap (hMemBmp), FALSE);
}
GFX (::GpiDestroyPS (MemPS), FALSE);
}
GFX (::GpiDestroyPS (MemPS), FALSE);
GFX (::DevCloseDC (MemDC), DEV_ERROR);
}
GFX (::DevCloseDC (MemDC), DEV_ERROR);
}
// If we failed to tile the bitmap, then use the old, slow, reliable way
if( didTile == PR_FALSE)
return SlowTile (aContext, aSurface, aSXOffset, aSYOffset, aTileRect);
{
// put the DestRect into absolute coordintes of the device
PRInt32 y0 = aTileRect.y - aSYOffset;
PRInt32 x0 = aTileRect.x - aSXOffset;
PRInt32 y1 = aTileRect.y + aTileRect.height;
PRInt32 x1 = aTileRect.x + aTileRect.width;
// this is the width and height of the image in pixels
// we need to map this to the pixel height of the device
nscoord ScaledTileWidth = PR_MAX(PRInt32(ImageWidth*scale), 1);
nscoord ScaledTileHeight = PR_MAX(PRInt32(ImageHeight*scale), 1);
for (PRInt32 y = y0; y < y1; y += ScaledTileHeight)
{
for (PRInt32 x = x0; x < x1; x += ScaledTileWidth)
{
Draw(aContext, aSurface,
0, 0, PR_MIN(ValidRect.width, x1 - x), PR_MIN(ValidRect.height, y1 - y),
x, y, PR_MIN(DestScaledWidth, x1-x), PR_MIN(DestScaledHeight, y1 - y));
}
}
}
}
nsresult nsImageOS2::SlowTile (nsIRenderingContext& aContext, nsDrawingSurface aSurface,
PRInt32 aSXOffset, PRInt32 aSYOffset, const nsRect &aTileRect)
{
PRInt32 x0, y0, x1, y1;
nscoord ScaledTileWidth, ScaledTileHeight;
PRInt32 ImageWidth = mInfo->cx;
PRInt32 ImageHeight = mInfo->cy;
nsIDeviceContext *theDeviceContext;
float scale;
aContext.GetDeviceContext(theDeviceContext);
theDeviceContext->GetCanonicalPixelScale(scale);
PRInt32 DestScaledWidth = ImageWidth * scale;
PRInt32 DestScaledHeight = ImageHeight * scale;
nsRect ValidRect (0, 0, ImageWidth, ImageHeight);
if (mDecodedRect.height < ImageHeight)
{
ValidRect.height = mDecodedRect.height - mDecodedRect.y;
DestScaledHeight = PR_MAX(PRInt32(ValidRect.height * scale), 1);
}
if (mDecodedRect.width < ImageWidth)
{
ValidRect.width = mDecodedRect.width - mDecodedRect.x;
DestScaledWidth = PR_MAX(PRInt32(ValidRect.width * scale), 1);
}
if (mDecodedRect.y > 0)
{
ValidRect.height -= mDecodedRect.height;
DestScaledHeight = PR_MAX(PRInt32(ValidRect.height * scale), 1);
ValidRect.y = mDecodedRect.height;
}
if (mDecodedRect.x > 0)
{
ValidRect.width -= mDecodedRect.x;
DestScaledWidth = PR_MAX(PRInt32(ValidRect.width * scale), 1);
ValidRect.x = mDecodedRect.width;
}
// put the DestRect into absolute coordintes of the device
y0 = aTileRect.y - aSYOffset;
x0 = aTileRect.x - aSXOffset;
y1 = aTileRect.y + aTileRect.height;
x1 = aTileRect.x + aTileRect.width;
// this is the width and height of the image in pixels
// we need to map this to the pixel height of the device
ScaledTileWidth = PR_MAX(PRInt32(ImageWidth*scale), 1);
ScaledTileHeight = PR_MAX(PRInt32(ImageHeight*scale), 1);
for (PRInt32 y = y0; y < y1; y += ScaledTileHeight)
{
for (PRInt32 x = x0; x < x1; x += ScaledTileWidth)
{
Draw(aContext, aSurface,
0, 0, PR_MIN(ValidRect.width, x1 - x), PR_MIN(ValidRect.height, y1 - y),
x, y, PR_MIN(DestScaledWidth, x1-x), PR_MIN(DestScaledHeight, y1 - y));
}
}
return NS_OK;
}
void nsImageOS2::NS2PM_ININ( const nsRect &in, RECTL &rcl)
{

3
gfx/src/os2/nsImageOS2.h
View File

@ -200,8 +200,7 @@ public:
void NS2PM_ININ( const nsRect &in, RECTL &rcl);
void CreateBitmaps( nsDrawingSurfaceOS2 *surf);
nsresult SlowTile (nsIRenderingContext& aContext, nsDrawingSurface aSurface, PRInt32 aSXOffset, PRInt32 aSYOffset, const nsRect &aTileRect);
void BuildTile (HPS hpsTile, PRUint8* pImageBits, PBITMAPINFO2 pBitmapInfo, nscoord aTileWidth, nscoord aTileHeight);
void BuildTile (HPS hpsTile, PRUint8* pImageBits, PBITMAPINFO2 pBitmapInfo, nscoord aTileWidth, nscoord aTileHeight, float scale);
};
#endif