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gdiplus: Read drawn bitmaps in one step instead of using getpixel.

This commit is contained in:
Vincent Povirk 2011-03-03 14:18:47 -06:00 committed by Alexandre Julliard
parent a7f95eeb7e
commit 870fdaf6ce
1 changed files with 163 additions and 37 deletions
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200
dlls/gdiplus/graphics.c
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@ -414,6 +414,95 @@ static void apply_image_attributes(const GpImageAttributes *attributes, LPBYTE d
}
}
/* Given a bitmap and its source rectangle, find the smallest rectangle in the
* bitmap that contains all the pixels we may need to draw it. */
static void get_bitmap_sample_size(InterpolationMode interpolation, WrapMode wrap,
GpBitmap* bitmap, REAL srcx, REAL srcy, REAL srcwidth, REAL srcheight,
GpRect *rect)
{
INT left, top, right, bottom;
switch (interpolation)
{
case InterpolationModeHighQualityBilinear:
case InterpolationModeHighQualityBicubic:
/* FIXME: Include a greater range for the prefilter? */
case InterpolationModeBicubic:
case InterpolationModeBilinear:
left = (INT)(floorf(srcx));
top = (INT)(floorf(srcy));
right = (INT)(ceilf(srcx+srcwidth));
bottom = (INT)(ceilf(srcy+srcheight));
break;
case InterpolationModeNearestNeighbor:
default:
left = roundr(srcx);
top = roundr(srcy);
right = roundr(srcx+srcwidth);
bottom = roundr(srcy+srcheight);
break;
}
if (wrap == WrapModeClamp)
{
if (left < 0)
left = 0;
if (top < 0)
top = 0;
if (right >= bitmap->width)
right = bitmap->width-1;
if (bottom >= bitmap->height)
bottom = bitmap->height-1;
}
else
{
/* In some cases we can make the rectangle smaller here, but the logic
* is hard to get right, and tiling suggests we're likely to use the
* entire source image. */
if (left < 0 || right >= bitmap->width)
{
left = 0;
right = bitmap->width-1;
}
if (top < 0 || bottom >= bitmap->height)
{
top = 0;
bottom = bitmap->height-1;
}
}
rect->X = left;
rect->Y = top;
rect->Width = right - left + 1;
rect->Height = bottom - top + 1;
}
static ARGB sample_bitmap_pixel(GDIPCONST GpRect *src_rect, LPBYTE bits, UINT width,
UINT height, INT x, INT y, GDIPCONST GpImageAttributes *attributes)
{
static int fixme[4];
switch (attributes->wrap)
{
default:
if (!fixme[attributes->wrap]++)
FIXME("not implemented for wrap mode %i\n", attributes->wrap);
case WrapModeClamp:
if (x < 0 || y < 0 || x >= width || y >= height)
return attributes->outside_color;
break;
}
if (x < src_rect->X || y < src_rect->Y || x >= src_rect->X + src_rect->Width || y >= src_rect->Y + src_rect->Height)
{
ERR("out of range pixel requested\n");
return 0xffcd0084;
}
return ((DWORD*)(bits))[(x - src_rect->X) + (y - src_rect->Y) * src_rect->Width];
}
static void brush_fill_path(GpGraphics *graphics, GpBrush* brush)
{
switch (brush->bt)
@ -2309,16 +2398,25 @@ GpStatus WINGDIPAPI GdipDrawImagePointsRect(GpGraphics *graphics, GpImage *image
if (use_software)
{
RECT src_area, dst_area;
int i, x, y, stride;
RECT dst_area;
GpRect src_area;
int i, x, y, src_stride, dst_stride;
GpMatrix *dst_to_src;
REAL m11, m12, m21, m22, mdx, mdy;
LPBYTE data;
LPBYTE src_data, dst_data;
BitmapData lockeddata;
InterpolationMode interpolation = graphics->interpolation;
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};
src_area.left = srcx*dx;
src_area.top = srcy*dy;
src_area.right = (srcx+srcwidth)*dx;
src_area.bottom = (srcy+srcheight)*dy;
if (!imageAttributes)
imageAttributes = &defaultImageAttributes;
srcx = srcx * dx;
srcy = srcy * dy;
srcwidth = srcwidth * dx;
srcheight = srcheight * dy;
dst_area.left = dst_area.right = pti[0].x;
dst_area.top = dst_area.bottom = pti[0].y;
@ -2347,65 +2445,93 @@ GpStatus WINGDIPAPI GdipDrawImagePointsRect(GpGraphics *graphics, GpImage *image
return stat;
}
data = GdipAlloc(sizeof(ARGB) * (dst_area.right - dst_area.left) * (dst_area.bottom - dst_area.top));
if (!data)
dst_data = GdipAlloc(sizeof(ARGB) * (dst_area.right - dst_area.left) * (dst_area.bottom - dst_area.top));
if (!dst_data)
{
GdipDeleteMatrix(dst_to_src);
return OutOfMemory;
}
stride = sizeof(ARGB) * (dst_area.right - dst_area.left);
dst_stride = sizeof(ARGB) * (dst_area.right - dst_area.left);
if (imageAttributes &&
(imageAttributes->wrap != WrapModeClamp ||
imageAttributes->outside_color != 0x00000000 ||
imageAttributes->clamp))
get_bitmap_sample_size(interpolation, imageAttributes->wrap,
bitmap, srcx, srcy, srcwidth, srcheight, &src_area);
src_data = GdipAlloc(sizeof(ARGB) * src_area.Width * src_area.Height);
if (!src_data)
{
static int fixme;
if (!fixme++)
FIXME("Image wrap mode not implemented\n");
GdipFree(dst_data);
GdipDeleteMatrix(dst_to_src);
return OutOfMemory;
}
src_stride = sizeof(ARGB) * src_area.Width;
/* Read the bits we need from the source bitmap into an ARGB buffer. */
lockeddata.Width = src_area.Width;
lockeddata.Height = src_area.Height;
lockeddata.Stride = src_stride;
lockeddata.PixelFormat = PixelFormat32bppARGB;
lockeddata.Scan0 = src_data;
stat = GdipBitmapLockBits(bitmap, &src_area, ImageLockModeRead|ImageLockModeUserInputBuf,
PixelFormat32bppARGB, &lockeddata);
if (stat == Ok)
stat = GdipBitmapUnlockBits(bitmap, &lockeddata);
if (stat != Ok)
{
if (src_data != dst_data)
GdipFree(src_data);
GdipFree(dst_data);
GdipDeleteMatrix(dst_to_src);
return OutOfMemory;
}
/* Transform the bits as needed to the destination. */
GdipTransformMatrixPoints(dst_to_src, dst_to_src_points, 3);
x_dx = dst_to_src_points[1].X - dst_to_src_points[0].X;
x_dy = dst_to_src_points[1].Y - dst_to_src_points[0].Y;
y_dx = dst_to_src_points[2].X - dst_to_src_points[0].X;
y_dy = dst_to_src_points[2].Y - dst_to_src_points[0].Y;
for (x=dst_area.left; x<dst_area.right; x++)
{
for (y=dst_area.top; y<dst_area.bottom; y++)
{
GpPointF src_pointf;
int src_x, src_y;
ARGB *src_color;
INT src_x, src_y;
ARGB *dst_color;
src_pointf.X = x;
src_pointf.Y = y;
GdipTransformMatrixPoints(dst_to_src, &src_pointf, 1);
src_pointf.X = dst_to_src_points[0].X + x * x_dx + y * y_dx;
src_pointf.Y = dst_to_src_points[0].Y + x * x_dy + y * y_dy;
src_x = roundr(src_pointf.X);
src_y = roundr(src_pointf.Y);
src_color = (ARGB*)(data + stride * (y - dst_area.top) + sizeof(ARGB) * (x - dst_area.left));
dst_color = (ARGB*)(dst_data + dst_stride * (y - dst_area.top) + sizeof(ARGB) * (x - dst_area.left));
if (src_x < src_area.left || src_x >= src_area.right ||
src_y < src_area.top || src_y >= src_area.bottom)
*src_color = 0;
if (src_pointf.X >= srcx && src_pointf.X < srcx + srcwidth && src_pointf.Y >= srcy && src_pointf.Y < srcy+srcheight)
*dst_color = sample_bitmap_pixel(&src_area, src_data, bitmap->width, bitmap->height, src_x, src_y, imageAttributes);
else
GdipBitmapGetPixel(bitmap, src_x, src_y, src_color);
*dst_color = 0;
}
}
GdipDeleteMatrix(dst_to_src);
if (imageAttributes)
{
apply_image_attributes(imageAttributes, data,
dst_area.right - dst_area.left,
dst_area.bottom - dst_area.top,
stride, ColorAdjustTypeBitmap);
}
GdipFree(src_data);
apply_image_attributes(imageAttributes, dst_data,
dst_area.right - dst_area.left,
dst_area.bottom - dst_area.top,
dst_stride, ColorAdjustTypeBitmap);
stat = alpha_blend_pixels(graphics, dst_area.left, dst_area.top,
data, dst_area.right - dst_area.left, dst_area.bottom - dst_area.top, stride);
dst_data, dst_area.right - dst_area.left, dst_area.bottom - dst_area.top, dst_stride);
GdipFree(data);
GdipFree(dst_data);
return stat;
}