gdiplus: Measure strings at device size, then rescale to world size.
Vincent Povirk
madewokherd at gmail.com
Tue Mar 27 13:08:30 CDT 2012
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From b50e3cab676f6160d32c6d9700603585d3e97270 Mon Sep 17 00:00:00 2001
From: Vincent Povirk <vincent at codeweavers.com>
Date: Tue, 27 Mar 2012 11:44:52 -0500
Subject: [PATCH] gdiplus: Measure strings at device size, then rescale to
world size.
This ensures that the size returned matches the size of the string as it would
be drawn on a particular graphics object.
---
dlls/gdiplus/graphics.c | 34 +++++++++++++++++++++++++++-------
1 files changed, 27 insertions(+), 7 deletions(-)
diff --git a/dlls/gdiplus/graphics.c b/dlls/gdiplus/graphics.c
index 89ed61b..f46d1ce 100644
--- a/dlls/gdiplus/graphics.c
+++ b/dlls/gdiplus/graphics.c
@@ -4943,6 +4943,7 @@ struct measure_string_args {
RectF *bounds;
INT *codepointsfitted;
INT *linesfilled;
+ REAL rel_width, rel_height;
};
static GpStatus measure_string_callback(HDC hdc,
@@ -4952,12 +4953,16 @@ static GpStatus measure_string_callback(HDC hdc,
INT underlined_index_count, void *user_data)
{
struct measure_string_args *args = user_data;
+ REAL new_width, new_height;
+
+ new_width = bounds->Width / args->rel_width;
+ new_height = (bounds->Height + bounds->Y - args->bounds->Y) / args->rel_height;
- if (bounds->Width > args->bounds->Width)
- args->bounds->Width = bounds->Width;
+ if (new_width > args->bounds->Width)
+ args->bounds->Width = new_width;
- if (bounds->Height + bounds->Y > args->bounds->Height + args->bounds->Y)
- args->bounds->Height = bounds->Height + bounds->Y - args->bounds->Y;
+ if (new_height > args->bounds->Height)
+ args->bounds->Height = new_height;
if (args->codepointsfitted)
*args->codepointsfitted = index + length;
@@ -4977,9 +4982,10 @@ GpStatus WINGDIPAPI GdipMeasureString(GpGraphics *graphics,
GDIPCONST RectF *rect, GDIPCONST GpStringFormat *format, RectF *bounds,
INT *codepointsfitted, INT *linesfilled)
{
- HFONT oldfont;
+ HFONT oldfont, gdifont;
struct measure_string_args args;
HDC temp_hdc=NULL, hdc;
+ GpPointF pt[3];
TRACE("(%p, %s, %i, %p, %s, %p, %p, %p, %p)\n", graphics,
debugstr_wn(string, length), length, font, debugstr_rectf(rect), format,
@@ -5002,7 +5008,20 @@ GpStatus WINGDIPAPI GdipMeasureString(GpGraphics *graphics,
if(format)
TRACE("may be ignoring some format flags: attr %x\n", format->attr);
- oldfont = SelectObject(hdc, CreateFontIndirectW(&font->lfw));
+ pt[0].X = 0.0;
+ pt[0].Y = 0.0;
+ pt[1].X = 1.0;
+ pt[1].Y = 0.0;
+ pt[2].X = 0.0;
+ pt[2].Y = 1.0;
+ GdipTransformPoints(graphics, CoordinateSpaceDevice, CoordinateSpaceWorld, pt, 3);
+ args.rel_width = sqrt((pt[1].Y-pt[0].Y)*(pt[1].Y-pt[0].Y)+
+ (pt[1].X-pt[0].X)*(pt[1].X-pt[0].X));
+ args.rel_height = sqrt((pt[2].Y-pt[0].Y)*(pt[2].Y-pt[0].Y)+
+ (pt[2].X-pt[0].X)*(pt[2].X-pt[0].X));
+
+ get_font_hfont(graphics, font, &gdifont);
+ oldfont = SelectObject(hdc, gdifont);
bounds->X = rect->X;
bounds->Y = rect->Y;
@@ -5016,7 +5035,8 @@ GpStatus WINGDIPAPI GdipMeasureString(GpGraphics *graphics,
gdip_format_string(hdc, string, length, font, rect, format,
measure_string_callback, &args);
- DeleteObject(SelectObject(hdc, oldfont));
+ SelectObject(hdc, oldfont);
+ DeleteObject(gdifont);
if (temp_hdc)
DeleteDC(temp_hdc);
--
1.7.9.1
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