pyrite-dev/milsko
pyrite-dev/milsko
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successfully convert a directwrite fontface to a gdi logfont
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IoI_xD 2026-07-16 22:17:41 -07:00
commit 72bfe25036
1 changed files with 46 additions and 10 deletions
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56
src/text/directwrite.c
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@ -1,3 +1,8 @@
/*
* DirectWrite Font backend
*
* This should dynamically load everything necessary and then gracefully fallback if the user isn't on Windows 10.
*/
#ifdef USE_DIRECTWRITE #ifdef USE_DIRECTWRITE
#define INITGUID #define INITGUID
#include <Mw/Milsko.h> #include <Mw/Milsko.h>
@ -19,13 +24,12 @@ static struct dw {
HRESULT (*DWriteCreateFactory)(int factoryType, const IID* const iid, IUnknown** factory); HRESULT (*DWriteCreateFactory)(int factoryType, const IID* const iid, IUnknown** factory);
} dw_table; } dw_table;
struct _MwFLFont { struct _MwFLFont {
int px; int px;
void * data; void * data;
MwBool valid; MwBool valid;
IDWriteFactory* dWriteFactory; IDWriteFactory6* write_factory;
IDWriteTextFormat* dTextFormat; IDWriteTextFormat* dTextFormat;
ID2D1Factory* d2dFactory; ID2D1Factory* d2dFactory;
ID2D1HwndRenderTarget* rt; ID2D1HwndRenderTarget* rt;
@ -34,8 +38,11 @@ struct _MwFLFont {
IDWriteFontFile * file; IDWriteFontFile * file;
IDWriteFontFace * font_face; IDWriteFontFace * font_face;
IDWriteFontSetBuilder2 * font_builder;
IDWriteFontSet* font_set;
IDWriteFontCollection1* font_collection;
LOGFONT logfont; LOGFONTW logfont;
HFONT font; HFONT font;
}; };
@ -120,7 +127,7 @@ static void* dw_MwFontLoad(unsigned char* data, unsigned int size, int px) {
goto fail; goto fail;
} }
hr = dw_table.DWriteCreateFactory(0 /*DWRITE_FACTORY_TYPE_SHARED*/,&IID_IDWriteFactory, (struct IUnknown**)&ttf->dWriteFactory); hr = dw_table.DWriteCreateFactory(DWRITE_FACTORY_TYPE_SHARED,&IID_IDWriteFactory, (struct IUnknown**)&ttf->write_factory);
if(!SUCCEEDED(hr)) { if(!SUCCEEDED(hr)) {
printf("DWriteCreateFactory failed for TTF (%08lx), cannot use DirectWrite\n", hr); printf("DWriteCreateFactory failed for TTF (%08lx), cannot use DirectWrite\n", hr);
@ -131,24 +138,54 @@ static void* dw_MwFontLoad(unsigned char* data, unsigned int size, int px) {
goto fail; goto fail;
}; };
hr = ttf->dWriteFactory->lpVtbl->CreateFontFileReference(ttf->dWriteFactory, font_name, NULL, &ttf->file); hr = IDWriteFactory6_CreateFontFileReference(ttf->write_factory, font_name, NULL, &ttf->file);
if(!SUCCEEDED(hr)) { if(!SUCCEEDED(hr)) {
printf("CreateFontFileReference failed for TTF (%08lx), cannot use DirectWrite\n",hr); printf("CreateFontFileReference failed for TTF (%08lx), cannot use DirectWrite\n",hr);
goto fail; goto fail;
} }
hr = ttf->dWriteFactory->lpVtbl->CreateFontFace(ttf->dWriteFactory, DWRITE_FONT_FACE_TYPE_TRUETYPE, 1, &ttf->file, 0, DWRITE_FONT_SIMULATIONS_NONE, &ttf->font_face); hr = IDWriteFactory_CreateFontFace(ttf->write_factory, DWRITE_FONT_FACE_TYPE_TRUETYPE, 1, &ttf->file, 0, DWRITE_FONT_SIMULATIONS_NONE, &ttf->font_face);
if(!SUCCEEDED(hr)) { if(!SUCCEEDED(hr)) {
printf("CreateFontFace failed for TTF (%08lx), cannot use DirectWrite\n",hr); printf("IDWriteFactory_CreateFontFace failed for TTF (%08lx), cannot use DirectWrite\n",hr);
goto fail; goto fail;
} }
hr = ttf->dWriteFactory->lpVtbl->GetGdiInterop(ttf->dWriteFactory, &ttf->gdiInterop); hr = IDWriteFactory6_CreateFontSetBuilder(ttf->write_factory, &ttf->font_builder);
if(!SUCCEEDED(hr)) {
printf("IDWriteFactory6_CreateFontSetBuilder failed for TTF (%08lx), cannot use DirectWrite\n",hr);
goto fail;
}
hr = IDWriteFontSetBuilder2_AddFontFile(ttf->font_builder, font_name);
if(!SUCCEEDED(hr)) {
printf("IDWriteFontSetBuilder2_AddFontFile failed for TTF (%08lx), cannot use DirectWrite\n",hr);
goto fail;
}
hr = IDWriteFontSetBuilder_CreateFontSet(ttf->font_builder, &ttf->font_set);
if(!SUCCEEDED(hr)) {
printf("IDWriteFontSetBuilder_CreateFontSet failed for TTF (%08lx), cannot use DirectWrite\n",hr);
goto fail;
}
hr = IDWriteFactory3_CreateFontCollectionFromFontSet(ttf->write_factory, ttf->font_set, &ttf->font_collection);
if(!SUCCEEDED(hr)) {
printf("IDWriteFactory3_CreateFontCollectionFromFontSet failed for TTF (%08lx), cannot use DirectWrite\n",hr);
goto fail;
}
hr = IDWriteFactory6_GetGdiInterop(ttf->write_factory, &ttf->gdiInterop);
if(!SUCCEEDED(hr)) { if(!SUCCEEDED(hr)) {
printf("GetGdiInterop failed for TTF (%08lx), cannot use DirectWrite\n",hr); printf("GetGdiInterop failed for TTF (%08lx), cannot use DirectWrite\n",hr);
goto fail; goto fail;
} }
IDWriteGdiInterop_ConvertFontFaceToLOGFONT(ttf->gdiInterop, ttf->font_face, &ttf->logfont);
if(!SUCCEEDED(hr)) {
printf("IDWriteGdiInterop_ConvertFontFaceToLOGFONT failed for TTF (%08lx), cannot use DirectWrite\n",hr);
goto fail;
}
ttf->valid = MwTRUE; ttf->valid = MwTRUE;
return ttf; return ttf;
@ -173,13 +210,12 @@ static int dw_MwTextHeight(MwFLFont ttf, int count) {
IDWriteFontFace_GetMetrics(ttf->font_face, &metrics); IDWriteFontFace_GetMetrics(ttf->font_face, &metrics);
height = ceil(((float)metrics.xHeight * ttf->px / metrics.designUnitsPerEm) * count); height = ceil(((float)metrics.capHeight * ttf->px / metrics.designUnitsPerEm) * count);
return height; return height;
} }
static void dw_MwFontFree(void* handle) { static void dw_MwFontFree(void* handle) {
MwFLFont ttf = handle; MwFLFont ttf = handle;