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gdiplus: Add preliminary support for pixel offset modes.

This commit is contained in:
Dmitry Timoshkov 2012-09-13 12:04:59 +09:00 committed by Alexandre Julliard
parent 556bdf249e
commit 4d42626dbe
1 changed files with 24 additions and 4 deletions
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28
dlls/gdiplus/graphics.c
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@ -836,7 +836,7 @@ static ARGB sample_bitmap_pixel(GDIPCONST GpRect *src_rect, LPBYTE bits, UINT wi
static ARGB resample_bitmap_pixel(GDIPCONST GpRect *src_rect, LPBYTE bits, UINT width,
UINT height, GpPointF *point, GDIPCONST GpImageAttributes *attributes,
InterpolationMode interpolation)
InterpolationMode interpolation, PixelOffsetMode offset_mode)
{
static int fixme;
@ -881,8 +881,25 @@ static ARGB resample_bitmap_pixel(GDIPCONST GpRect *src_rect, LPBYTE bits, UINT
return blend_colors(top, bottom, point->Y - topyf);
}
case InterpolationModeNearestNeighbor:
{
FLOAT pixel_offset;
switch (offset_mode)
{
default:
case PixelOffsetModeNone:
case PixelOffsetModeHighSpeed:
pixel_offset = 0.5;
break;
case PixelOffsetModeHalf:
case PixelOffsetModeHighQuality:
pixel_offset = 0.0;
break;
}
return sample_bitmap_pixel(src_rect, bits, width, height,
gdip_round(point->X), gdip_round(point->Y), attributes);
floorf(point->X + pixel_offset), floorf(point->Y + pixel_offset), attributes);
}
}
}
@ -1176,7 +1193,8 @@ static GpStatus brush_fill_pixels(GpGraphics *graphics, GpBrush *brush,
argb_pixels[x + y*cdwStride] = resample_bitmap_pixel(
&src_area, fill->bitmap_bits, bitmap->width, bitmap->height,
&point, fill->imageattributes, graphics->interpolation);
&point, fill->imageattributes, graphics->interpolation,
graphics->pixeloffset);
}
}
}
@ -3122,6 +3140,7 @@ GpStatus WINGDIPAPI GdipDrawImagePointsRect(GpGraphics *graphics, GpImage *image
LPBYTE src_data, dst_data;
BitmapData lockeddata;
InterpolationMode interpolation = graphics->interpolation;
PixelOffsetMode offset_mode = graphics->pixeloffset;
GpPointF dst_to_src_points[3] = {{0.0, 0.0}, {1.0, 0.0}, {0.0, 1.0}};
REAL x_dx, x_dy, y_dx, y_dy;
static const GpImageAttributes defaultImageAttributes = {WrapModeClamp, 0, FALSE};
@ -3228,7 +3247,8 @@ GpStatus WINGDIPAPI GdipDrawImagePointsRect(GpGraphics *graphics, GpImage *image
dst_color = (ARGB*)(dst_data + dst_stride * (y - dst_area.top) + sizeof(ARGB) * (x - dst_area.left));
if (src_pointf.X >= srcx && src_pointf.X < srcx + srcwidth && src_pointf.Y >= srcy && src_pointf.Y < srcy+srcheight)
*dst_color = resample_bitmap_pixel(&src_area, src_data, bitmap->width, bitmap->height, &src_pointf, imageAttributes, interpolation);
*dst_color = resample_bitmap_pixel(&src_area, src_data, bitmap->width, bitmap->height, &src_pointf,
imageAttributes, interpolation, offset_mode);
else
*dst_color = 0;
}