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gdiplus: Transform bitmaps to non-rectangular parallelograms in software.

This commit is contained in:
Vincent Povirk 2010-04-15 14:48:47 -05:00 committed by Alexandre Julliard
parent 9c380b1e8e
commit 7791f02fd9
1 changed files with 45 additions and 4 deletions
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49
dlls/gdiplus/graphics.c
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@ -197,8 +197,47 @@ static GpStatus alpha_blend_pixels(GpGraphics *graphics, INT dst_x, INT dst_y,
}
else
{
ERR("Not implemented for non-bitmap DC's\n");
return GenericError;
HDC hdc;
HBITMAP hbitmap, old_hbm=NULL;
BITMAPINFOHEADER bih;
BYTE *temp_bits;
BLENDFUNCTION bf;
hdc = CreateCompatibleDC(0);
bih.biSize = sizeof(BITMAPINFOHEADER);
bih.biWidth = src_width;
bih.biHeight = -src_height;
bih.biPlanes = 1;
bih.biBitCount = 32;
bih.biCompression = BI_RGB;
bih.biSizeImage = 0;
bih.biXPelsPerMeter = 0;
bih.biYPelsPerMeter = 0;
bih.biClrUsed = 0;
bih.biClrImportant = 0;
hbitmap = CreateDIBSection(hdc, (BITMAPINFO*)&bih, DIB_RGB_COLORS,
(void**)&temp_bits, NULL, 0);
convert_32bppARGB_to_32bppPARGB(src_width, src_height, temp_bits,
4 * src_width, src, src_stride);
old_hbm = SelectObject(hdc, hbitmap);
bf.BlendOp = AC_SRC_OVER;
bf.BlendFlags = 0;
bf.SourceConstantAlpha = 255;
bf.AlphaFormat = AC_SRC_ALPHA;
GdiAlphaBlend(graphics->hdc, dst_x, dst_y, src_width, src_height,
hdc, 0, 0, src_width, src_height, bf);
SelectObject(hdc, old_hbm);
DeleteDC(hdc);
DeleteObject(hbitmap);
return Ok;
}
}
@ -1895,7 +1934,6 @@ GpStatus WINGDIPAPI GdipDrawImagePointsI(GpGraphics *graphics, GpImage *image,
return NotImplemented;
}
/* FIXME: partially implemented (only works for rectangular parallelograms) */
GpStatus WINGDIPAPI GdipDrawImagePointsRect(GpGraphics *graphics, GpImage *image,
GDIPCONST GpPointF *points, INT count, REAL srcx, REAL srcy, REAL srcwidth,
REAL srcheight, GpUnit srcUnit, GDIPCONST GpImageAttributes* imageAttributes,
@ -1923,6 +1961,7 @@ GpStatus WINGDIPAPI GdipDrawImagePointsRect(GpGraphics *graphics, GpImage *image
if (image->picture)
{
/* FIXME: partially implemented (only works for rectangular parallelograms) */
if(srcUnit == UnitInch)
dx = dy = (REAL) INCH_HIMETRIC;
else if(srcUnit == UnitPixel){
@ -1956,7 +1995,9 @@ GpStatus WINGDIPAPI GdipDrawImagePointsRect(GpGraphics *graphics, GpImage *image
else
return NotImplemented;
if (graphics->image && graphics->image->type == ImageTypeBitmap)
if (ptf[1].Y != ptf[0].Y || ptf[2].X != ptf[0].X)
use_software = 1;
else if (graphics->image && graphics->image->type == ImageTypeBitmap)
{
GpBitmap *dst_bitmap = (GpBitmap*)graphics->image;
if (!(dst_bitmap->format == PixelFormat16bppRGB555 ||