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gdi32: Add support for drawing diagonal patterned lines.

This commit is contained in:
Huw Davies 2011-05-06 11:58:18 +01:00 committed by Alexandre Julliard
parent 72804fca54
commit 699f1ab0dc
2 changed files with 85 additions and 3 deletions
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68
dlls/gdi32/dibdrv/objects.c
View File

@ -583,6 +583,21 @@ static inline void get_dash_colors(const dibdrv_physdev *pdev, DWORD *and, DWORD
}
}
static void dashed_pen_line_callback(dibdrv_physdev *pdev, INT x, INT y)
{
RECT rect;
DWORD and, xor;
get_dash_colors(pdev, &and, &xor);
skip_dash(pdev, 1);
rect.left = x;
rect.right = x + 1;
rect.top = y;
rect.bottom = y + 1;
pdev->dib.funcs->solid_rects(&pdev->dib, 1, &rect, and, xor);
return;
}
static BOOL dashed_pen_line(dibdrv_physdev *pdev, POINT *start, POINT *end)
{
const WINEREGION *clip = get_wine_region(pdev->clip);
@ -590,7 +605,6 @@ static BOOL dashed_pen_line(dibdrv_physdev *pdev, POINT *start, POINT *end)
int i, dash_len;
RECT rect;
const dash_pos start_pos = pdev->dash_pos;
BOOL ret = TRUE;
if(start->y == end->y) /* hline */
{
@ -749,11 +763,59 @@ static BOOL dashed_pen_line(dibdrv_physdev *pdev, POINT *start, POINT *end)
}
else
{
ret = FALSE;
bres_params params;
INT dx = end->x - start->x;
INT dy = end->y - start->y;
INT i;
params.dx = abs(dx);
params.dy = abs(dy);
params.octant = get_octant_mask(dx, dy);
/* Octants 3, 5, 6 and 8 take a bias */
params.bias = (params.octant & 0xb4) ? 1 : 0;
for(i = 0; i < clip->numRects; i++)
{
POINT clipped_start, clipped_end;
int clip_status;
clip_status = clip_line(start, end, clip->rects + i, &params, &clipped_start, &clipped_end);
if(clip_status)
{
int m = abs(clipped_start.x - start->x);
int n = abs(clipped_start.y - start->y);
int err;
BOOL last_pt = FALSE;
pdev->dash_pos = start_pos;
if(is_xmajor(params.octant))
{
err = 2 * params.dy - params.dx + m * 2 * params.dy - n * 2 * params.dx;
skip_dash(pdev, m);
}
else
{
err = 2 * params.dx - params.dy + n * 2 * params.dx - m * 2 * params.dy;
skip_dash(pdev, n);
}
if(clip_status == 1 && (end->x != clipped_end.x || end->y != clipped_end.y)) last_pt = TRUE;
bres_line_with_bias(clipped_start.x, clipped_start.y, clipped_end.x, clipped_end.y, &params,
err, last_pt, dashed_pen_line_callback, pdev);
if(clip_status == 2) break; /* completely unclipped, so we can finish */
}
}
pdev->dash_pos = start_pos;
if(is_xmajor(params.octant))
skip_dash(pdev, params.dx);
else
skip_dash(pdev, params.dy);
}
release_wine_region(pdev->clip);
return ret;
return TRUE;
}
static const dash_pattern dash_patterns[4] =

20
dlls/gdi32/tests/dib.c
View File

@ -88,6 +88,8 @@ static const char *sha1_graphics_a8r8g8b8[] =
"c387917268455017aa0b28bed73aa6554044bbb3",
"dcae44fee010dbf7a107797a503923fd8b1abe2e",
"6c530622a025d872a642e8f950867884d7b136cb",
"7c07d91b8f68fb31821701b3dcb96de018bf0c66",
"b2261353decda2712b83538ab434a49ce21f3172",
NULL
};
@ -393,6 +395,24 @@ static void draw_graphics(HDC hdc, BITMAPINFO *bmi, BYTE *bits, const char ***sh
compare_hash(bmi, bits, sha1, "clipped dashed vlines b -> t");
memset(bits, 0xcc, dib_size);
for(i = 0; i < sizeof(line_clips)/sizeof(line_clips[0]); i++)
{
MoveToEx(hdc, line_clips[i].left, line_clips[i].top, NULL);
LineTo(hdc, line_clips[i].right, line_clips[i].bottom);
}
compare_hash(bmi, bits, sha1, "clipped dashed diagonal lines");
memset(bits, 0xcc, dib_size);
SetBkMode(hdc, OPAQUE);
for(i = 0; i < sizeof(line_clips)/sizeof(line_clips[0]); i++)
{
MoveToEx(hdc, line_clips[i].left, line_clips[i].top, NULL);
LineTo(hdc, line_clips[i].right, line_clips[i].bottom);
}
compare_hash(bmi, bits, sha1, "clipped opaque dashed diagonal lines");
memset(bits, 0xcc, dib_size);
ExtSelectClipRgn(hdc, NULL, RGN_COPY);
SelectObject(hdc, orig_brush);