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Code Issues Releases Wiki Activity

Gfx: Add Util::GetAdjustedDWriteTextLayoutMetrics to reduce code duplication

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This commit is contained in:
Birunthan Mohanathas 2013-07-31 13:09:48 +03:00
parent 82b8920443
commit 37fd105650
3 changed files with 39 additions and 35 deletions
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39
Common/Gfx/CanvasD2D.cpp
View File

@ -19,6 +19,7 @@
#include "CanvasD2D.h"
#include "TextFormatD2D.h"
#include "Util/DWriteFontCollectionLoader.h"
#include "Util/DWriteHelpers.h"
#include "Util/WICBitmapLockGDIP.h"
#include "../../Library/Litestep.h"
@ -321,7 +322,7 @@ void CanvasD2D::DrawTextW(const WCHAR* str, UINT strLen, const TextFormat& forma
if (!m_AccurateText && m_TextAntiAliasing)
{
float emOffset = xOffset / 25.0f;
const float emOffset = xOffset / 25.0f;
DWRITE_TEXT_RANGE range = {0, strLen};
Microsoft::WRL::ComPtr<IDWriteTextLayout1> textLayout;
@ -349,23 +350,10 @@ bool CanvasD2D::MeasureTextW(const WCHAR* str, UINT strLen, const TextFormat& fo
textLayout.GetAddressOf());
if (SUCCEEDED(hr))
{
DWRITE_TEXT_METRICS metrics;
textLayout->GetMetrics(&metrics);
if (!m_AccurateText)
{
float size = 0.0f;
textLayout->GetFontSize(0, &size);
rect.Width = floor(metrics.width + (size / 2.05f) + (metrics.width / 55.0f) - 0.5f);
rect.Height = floor(metrics.height + (size / 9.25f) + 0.3f);
}
else
{
const DWRITE_TEXT_METRICS metrics =
Util::GetAdjustedDWriteTextLayoutMetrics(textLayout.Get(), !m_AccurateText);
rect.Width = metrics.width;
rect.Height = metrics.height;
}
return true;
}
@ -386,23 +374,10 @@ bool CanvasD2D::MeasureTextLinesW(const WCHAR* str, UINT strLen, const TextForma
textLayout.GetAddressOf());
if (SUCCEEDED(hr))
{
DWRITE_TEXT_METRICS metrics;
textLayout->GetMetrics(&metrics);
if (!m_AccurateText)
{
float size = 0.0f;
textLayout->GetFontSize(0, &size);
rect.Width = floor(metrics.width + (size / 2.05f) + (metrics.width / 55.0f) - 0.5f);
rect.Height = floor(metrics.height + (size / 9.25f) + 0.3f);
}
else
{
const DWRITE_TEXT_METRICS metrics =
Util::GetAdjustedDWriteTextLayoutMetrics(textLayout.Get(), !m_AccurateText);
rect.Width = metrics.width;
rect.Height = metrics.height + 1.0f;
}
rect.Height = metrics.height;
lines = metrics.lineCount;
return true;
}

24
Common/Gfx/Util/DWriteHelpers.cpp
View File

@ -18,10 +18,34 @@
#include "DWriteHelpers.h"
#include <wrl/client.h>
#include <cmath>
namespace Gfx {
namespace Util {
DWRITE_TEXT_METRICS GetAdjustedDWriteTextLayoutMetrics(
IDWriteTextLayout* textLayout, bool gdiEmulation)
{
DWRITE_TEXT_METRICS metrics;
textLayout->GetMetrics(&metrics);
if (gdiEmulation)
{
float size = 0.0f;
textLayout->GetFontSize(0, &size);
metrics.width = floor(metrics.width + (size / 2.05f) + (metrics.width / 55.0f) - 0.5f);
metrics.height = floor(metrics.height + (size / 9.25f) + 0.3f);
}
else
{
// GDI+ draws multi-line text even though the last line may be clipped slightly at the bottom.
// This is a workaround to emulate that behaviour.
metrics.height += 1.0f;
}
return metrics;
}
HRESULT GetDWritePropertiesFromGDIProperties(
IDWriteFactory* factory, const WCHAR* gdiFamilyName, const bool gdiBold, const bool gdiItalic,
DWRITE_FONT_WEIGHT& dwriteFontWeight, DWRITE_FONT_STYLE& dwriteFontStyle,

5
Common/Gfx/Util/DWriteHelpers.h
View File

@ -24,6 +24,11 @@
namespace Gfx {
namespace Util {
// If |gdiEmulation| is true, the returns metrics have similar characteristics to those provided
// by GDI+.
DWRITE_TEXT_METRICS GetAdjustedDWriteTextLayoutMetrics(
IDWriteTextLayout* textLayout, bool gdiEmulation);
// Maps the GDI family name and italic/bold flags to the DirectWrite family name, weight, style,
// and stretch.
HRESULT GetDWritePropertiesFromGDIProperties(