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/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
/* Cairo - a vector graphics library with display and print output
*
* Copyright © 2010 Mozilla Foundation
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is the Mozilla Foundation
*
* Contributor(s):
* Bas Schouten <bschouten@mozilla.com>
*/
#include "cairoint.h"
#include "cairo-win32-refptr.hpp"
#include <dwrite.h>
#include <dwrite_2.h>
#include <d2d1.h>
/* If either of the dwrite_3.h or d2d1_3.h headers required for color fonts
* are not available, include our own version containing just the functions we need.
*/
#if HAVE_DWRITE_3_H
#include <dwrite_3.h>
#else
#include "dw-extra.h"
#endif
#if HAVE_D2D1_3_H
#include <d2d1_3.h>
#else
#include "d2d1-extra.h"
#endif
// DirectWrite is not available on all platforms.
typedef HRESULT (WINAPI*DWriteCreateFactoryFunc)(
DWRITE_FACTORY_TYPE factoryType,
REFIID iid,
IUnknown **factory
);
/* #cairo_scaled_font_t implementation */
struct _cairo_dwrite_scaled_font {
cairo_scaled_font_t base;
cairo_matrix_t mat;
cairo_matrix_t mat_inverse;
cairo_antialias_t antialias_mode;
DWRITE_MEASURING_MODE measuring_mode;
enum TextRenderingState {
TEXT_RENDERING_UNINITIALIZED,
TEXT_RENDERING_NO_CLEARTYPE,
TEXT_RENDERING_NORMAL,
TEXT_RENDERING_GDI_CLASSIC
};
TextRenderingState rendering_mode;
};
typedef struct _cairo_dwrite_scaled_font cairo_dwrite_scaled_font_t;
class DWriteFactory
{
public:
static RefPtr<IDWriteFactory> Instance()
{
if (!mFactoryInstance) {
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wcast-function-type"
#endif
DWriteCreateFactoryFunc createDWriteFactory = (DWriteCreateFactoryFunc)
GetProcAddress(LoadLibraryW(L"dwrite.dll"), "DWriteCreateFactory");
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
if (createDWriteFactory) {
HRESULT hr = createDWriteFactory(
DWRITE_FACTORY_TYPE_SHARED,
__uuidof(IDWriteFactory),
reinterpret_cast<IUnknown**>(&mFactoryInstance));
assert(SUCCEEDED(hr));
}
}
return mFactoryInstance;
}
static RefPtr<IDWriteFactory4> Instance4()
{
if (!mFactoryInstance4) {
if (Instance()) {
Instance()->QueryInterface(&mFactoryInstance4);
}
}
return mFactoryInstance4;
}
static RefPtr<IDWriteFontCollection> SystemCollection()
{
if (!mSystemCollection) {
if (Instance()) {
HRESULT hr = Instance()->GetSystemFontCollection(&mSystemCollection);
assert(SUCCEEDED(hr));
}
}
return mSystemCollection;
}
static RefPtr<IDWriteFontFamily> FindSystemFontFamily(const WCHAR *aFamilyName)
{
UINT32 idx;
BOOL found;
if (!SystemCollection()) {
return NULL;
}
SystemCollection()->FindFamilyName(aFamilyName, &idx, &found);
if (!found) {
return NULL;
}
RefPtr<IDWriteFontFamily> family;
SystemCollection()->GetFontFamily(idx, &family);
return family;
}
static RefPtr<IDWriteRenderingParams> RenderingParams(cairo_dwrite_scaled_font_t::TextRenderingState mode)
{
if (!mDefaultRenderingParams ||
!mForceGDIClassicRenderingParams ||
!mCustomClearTypeRenderingParams)
{
CreateRenderingParams();
}
RefPtr<IDWriteRenderingParams> params;
if (mode == cairo_dwrite_scaled_font_t::TEXT_RENDERING_NO_CLEARTYPE) {
params = mDefaultRenderingParams;
} else if (mode == cairo_dwrite_scaled_font_t::TEXT_RENDERING_GDI_CLASSIC && mRenderingMode < 0) {
params = mForceGDIClassicRenderingParams;
} else {
params = mCustomClearTypeRenderingParams;
}
return params;
}
static void SetRenderingParams(FLOAT aGamma,
FLOAT aEnhancedContrast,
FLOAT aClearTypeLevel,
int aPixelGeometry,
int aRenderingMode)
{
mGamma = aGamma;
mEnhancedContrast = aEnhancedContrast;
mClearTypeLevel = aClearTypeLevel;
mPixelGeometry = aPixelGeometry;
mRenderingMode = aRenderingMode;
// discard any current RenderingParams objects
if (mCustomClearTypeRenderingParams) {
mCustomClearTypeRenderingParams->Release();
mCustomClearTypeRenderingParams = NULL;
}
if (mForceGDIClassicRenderingParams) {
mForceGDIClassicRenderingParams->Release();
mForceGDIClassicRenderingParams = NULL;
}
if (mDefaultRenderingParams) {
mDefaultRenderingParams->Release();
mDefaultRenderingParams = NULL;
}
}
static int GetClearTypeRenderingMode() {
return mRenderingMode;
}
private:
static void CreateRenderingParams();
static RefPtr<IDWriteFactory> mFactoryInstance;
static RefPtr<IDWriteFactory4> mFactoryInstance4;
static RefPtr<IDWriteFontCollection> mSystemCollection;
static RefPtr<IDWriteRenderingParams> mDefaultRenderingParams;
static RefPtr<IDWriteRenderingParams> mCustomClearTypeRenderingParams;
static RefPtr<IDWriteRenderingParams> mForceGDIClassicRenderingParams;
static FLOAT mGamma;
static FLOAT mEnhancedContrast;
static FLOAT mClearTypeLevel;
static int mPixelGeometry;
static int mRenderingMode;
};
class AutoDWriteGlyphRun : public DWRITE_GLYPH_RUN
{
static const int kNumAutoGlyphs = 256;
public:
AutoDWriteGlyphRun() {
glyphCount = 0;
}
~AutoDWriteGlyphRun() {
if (glyphCount > kNumAutoGlyphs) {
delete[] glyphIndices;
delete[] glyphAdvances;
delete[] glyphOffsets;
}
}
void allocate(int aNumGlyphs) {
glyphCount = aNumGlyphs;
if (aNumGlyphs <= kNumAutoGlyphs) {
glyphIndices = &mAutoIndices[0];
glyphAdvances = &mAutoAdvances[0];
glyphOffsets = &mAutoOffsets[0];
} else {
glyphIndices = new UINT16[aNumGlyphs];
glyphAdvances = new FLOAT[aNumGlyphs];
glyphOffsets = new DWRITE_GLYPH_OFFSET[aNumGlyphs];
}
}
private:
DWRITE_GLYPH_OFFSET mAutoOffsets[kNumAutoGlyphs];
FLOAT mAutoAdvances[kNumAutoGlyphs];
UINT16 mAutoIndices[kNumAutoGlyphs];
};
/* #cairo_font_face_t implementation */
struct _cairo_dwrite_font_face {
cairo_font_face_t base;
IDWriteFontFace *dwriteface; /* Can't use RefPtr because this struct is malloc'd. */
cairo_bool_t have_color;
};
typedef struct _cairo_dwrite_font_face cairo_dwrite_font_face_t;
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