diff options
Diffstat (limited to 'src/libui_sdl/libui/windows/drawtext.cpp')
| -rw-r--r-- | src/libui_sdl/libui/windows/drawtext.cpp | 531 |
1 files changed, 0 insertions, 531 deletions
diff --git a/src/libui_sdl/libui/windows/drawtext.cpp b/src/libui_sdl/libui/windows/drawtext.cpp deleted file mode 100644 index 05a24f6..0000000 --- a/src/libui_sdl/libui/windows/drawtext.cpp +++ /dev/null @@ -1,531 +0,0 @@ -// 22 december 2015 -#include "uipriv_windows.hpp" -#include "draw.hpp" -// TODO really migrate - -// notes: -// only available in windows 8 and newer: -// - character spacing -// - kerning control -// - justficiation (how could I possibly be making this up?!) -// - vertical text (SERIOUSLY?! WHAT THE ACTUAL FUCK, MICROSOFT?!?!?!? DID YOU NOT THINK ABOUT THIS THE FIRST TIME, TRYING TO IMPROVE THE INTERNATIONALIZATION OF WINDOWS 7?!?!?! bonus: some parts of MSDN even say 8.1 and up only!) - -struct uiDrawFontFamilies { - fontCollection *fc; -}; - -uiDrawFontFamilies *uiDrawListFontFamilies(void) -{ - struct uiDrawFontFamilies *ff; - - ff = uiNew(struct uiDrawFontFamilies); - ff->fc = loadFontCollection(); - return ff; -} - -int uiDrawFontFamiliesNumFamilies(uiDrawFontFamilies *ff) -{ - return ff->fc->fonts->GetFontFamilyCount(); -} - -char *uiDrawFontFamiliesFamily(uiDrawFontFamilies *ff, int n) -{ - IDWriteFontFamily *family; - WCHAR *wname; - char *name; - HRESULT hr; - - hr = ff->fc->fonts->GetFontFamily(n, &family); - if (hr != S_OK) - logHRESULT(L"error getting font out of collection", hr); - wname = fontCollectionFamilyName(ff->fc, family); - name = toUTF8(wname); - uiFree(wname); - family->Release(); - return name; -} - -void uiDrawFreeFontFamilies(uiDrawFontFamilies *ff) -{ - fontCollectionFree(ff->fc); - uiFree(ff); -} - -struct uiDrawTextFont { - IDWriteFont *f; - WCHAR *family; // save for convenience in uiDrawNewTextLayout() - double size; -}; - -uiDrawTextFont *mkTextFont(IDWriteFont *df, BOOL addRef, WCHAR *family, BOOL copyFamily, double size) -{ - uiDrawTextFont *font; - WCHAR *copy; - HRESULT hr; - - font = uiNew(uiDrawTextFont); - font->f = df; - if (addRef) - font->f->AddRef(); - if (copyFamily) { - copy = (WCHAR *) uiAlloc((wcslen(family) + 1) * sizeof (WCHAR), "WCHAR[]"); - wcscpy(copy, family); - font->family = copy; - } else - font->family = family; - font->size = size; - return font; -} - -// TODO consider moving these all to dwrite.cpp - -// TODO MinGW-w64 is missing this one -#define DWRITE_FONT_WEIGHT_SEMI_LIGHT (DWRITE_FONT_WEIGHT(350)) -static const struct { - bool lastOne; - uiDrawTextWeight uival; - DWRITE_FONT_WEIGHT dwval; -} dwriteWeights[] = { - { false, uiDrawTextWeightThin, DWRITE_FONT_WEIGHT_THIN }, - { false, uiDrawTextWeightUltraLight, DWRITE_FONT_WEIGHT_ULTRA_LIGHT }, - { false, uiDrawTextWeightLight, DWRITE_FONT_WEIGHT_LIGHT }, - { false, uiDrawTextWeightBook, DWRITE_FONT_WEIGHT_SEMI_LIGHT }, - { false, uiDrawTextWeightNormal, DWRITE_FONT_WEIGHT_NORMAL }, - { false, uiDrawTextWeightMedium, DWRITE_FONT_WEIGHT_MEDIUM }, - { false, uiDrawTextWeightSemiBold, DWRITE_FONT_WEIGHT_SEMI_BOLD }, - { false, uiDrawTextWeightBold, DWRITE_FONT_WEIGHT_BOLD }, - { false, uiDrawTextWeightUltraBold, DWRITE_FONT_WEIGHT_ULTRA_BOLD }, - { false, uiDrawTextWeightHeavy, DWRITE_FONT_WEIGHT_HEAVY }, - { true, uiDrawTextWeightUltraHeavy, DWRITE_FONT_WEIGHT_ULTRA_BLACK, }, -}; - -static const struct { - bool lastOne; - uiDrawTextItalic uival; - DWRITE_FONT_STYLE dwval; -} dwriteItalics[] = { - { false, uiDrawTextItalicNormal, DWRITE_FONT_STYLE_NORMAL }, - { false, uiDrawTextItalicOblique, DWRITE_FONT_STYLE_OBLIQUE }, - { true, uiDrawTextItalicItalic, DWRITE_FONT_STYLE_ITALIC }, -}; - -static const struct { - bool lastOne; - uiDrawTextStretch uival; - DWRITE_FONT_STRETCH dwval; -} dwriteStretches[] = { - { false, uiDrawTextStretchUltraCondensed, DWRITE_FONT_STRETCH_ULTRA_CONDENSED }, - { false, uiDrawTextStretchExtraCondensed, DWRITE_FONT_STRETCH_EXTRA_CONDENSED }, - { false, uiDrawTextStretchCondensed, DWRITE_FONT_STRETCH_CONDENSED }, - { false, uiDrawTextStretchSemiCondensed, DWRITE_FONT_STRETCH_SEMI_CONDENSED }, - { false, uiDrawTextStretchNormal, DWRITE_FONT_STRETCH_NORMAL }, - { false, uiDrawTextStretchSemiExpanded, DWRITE_FONT_STRETCH_SEMI_EXPANDED }, - { false, uiDrawTextStretchExpanded, DWRITE_FONT_STRETCH_EXPANDED }, - { false, uiDrawTextStretchExtraExpanded, DWRITE_FONT_STRETCH_EXTRA_EXPANDED }, - { true, uiDrawTextStretchUltraExpanded, DWRITE_FONT_STRETCH_ULTRA_EXPANDED }, -}; - -void attrToDWriteAttr(struct dwriteAttr *attr) -{ - bool found; - int i; - - found = false; - for (i = 0; ; i++) { - if (dwriteWeights[i].uival == attr->weight) { - attr->dweight = dwriteWeights[i].dwval; - found = true; - break; - } - if (dwriteWeights[i].lastOne) - break; - } - if (!found) - userbug("Invalid text weight %d passed to text function.", attr->weight); - - found = false; - for (i = 0; ; i++) { - if (dwriteItalics[i].uival == attr->italic) { - attr->ditalic = dwriteItalics[i].dwval; - found = true; - break; - } - if (dwriteItalics[i].lastOne) - break; - } - if (!found) - userbug("Invalid text italic %d passed to text function.", attr->italic); - - found = false; - for (i = 0; ; i++) { - if (dwriteStretches[i].uival == attr->stretch) { - attr->dstretch = dwriteStretches[i].dwval; - found = true; - break; - } - if (dwriteStretches[i].lastOne) - break; - } - if (!found) - // TODO on other platforms too - userbug("Invalid text stretch %d passed to text function.", attr->stretch); -} - -void dwriteAttrToAttr(struct dwriteAttr *attr) -{ - int weight, against, n; - int curdiff, curindex; - bool found; - int i; - - // weight is scaled; we need to test to see what's nearest - weight = (int) (attr->dweight); - against = (int) (dwriteWeights[0].dwval); - curdiff = abs(against - weight); - curindex = 0; - for (i = 1; ; i++) { - against = (int) (dwriteWeights[i].dwval); - n = abs(against - weight); - if (n < curdiff) { - curdiff = n; - curindex = i; - } - if (dwriteWeights[i].lastOne) - break; - } - attr->weight = dwriteWeights[i].uival; - - // italic and stretch are simple values; we can just do a matching search - found = false; - for (i = 0; ; i++) { - if (dwriteItalics[i].dwval == attr->ditalic) { - attr->italic = dwriteItalics[i].uival; - found = true; - break; - } - if (dwriteItalics[i].lastOne) - break; - } - if (!found) - // these are implbug()s because users shouldn't be able to get here directly; TODO? - implbug("invalid italic %d passed to dwriteAttrToAttr()", attr->ditalic); - - found = false; - for (i = 0; ; i++) { - if (dwriteStretches[i].dwval == attr->dstretch) { - attr->stretch = dwriteStretches[i].uival; - found = true; - break; - } - if (dwriteStretches[i].lastOne) - break; - } - if (!found) - implbug("invalid stretch %d passed to dwriteAttrToAttr()", attr->dstretch); -} - -uiDrawTextFont *uiDrawLoadClosestFont(const uiDrawTextFontDescriptor *desc) -{ - uiDrawTextFont *font; - IDWriteFontCollection *collection; - UINT32 index; - BOOL exists; - struct dwriteAttr attr; - IDWriteFontFamily *family; - WCHAR *wfamily; - IDWriteFont *match; - HRESULT hr; - - // always get the latest available font information - hr = dwfactory->GetSystemFontCollection(&collection, TRUE); - if (hr != S_OK) - logHRESULT(L"error getting system font collection", hr); - - wfamily = toUTF16(desc->Family); - hr = collection->FindFamilyName(wfamily, &index, &exists); - if (hr != S_OK) - logHRESULT(L"error finding font family", hr); - if (!exists) - implbug("LONGTERM family not found in uiDrawLoadClosestFont()", hr); - hr = collection->GetFontFamily(index, &family); - if (hr != S_OK) - logHRESULT(L"error loading font family", hr); - - attr.weight = desc->Weight; - attr.italic = desc->Italic; - attr.stretch = desc->Stretch; - attrToDWriteAttr(&attr); - hr = family->GetFirstMatchingFont( - attr.dweight, - attr.dstretch, - attr.ditalic, - &match); - if (hr != S_OK) - logHRESULT(L"error loading font", hr); - - font = mkTextFont(match, - FALSE, // we own the initial reference; no need to add another one - wfamily, FALSE, // will be freed with font - desc->Size); - - family->Release(); - collection->Release(); - - return font; -} - -void uiDrawFreeTextFont(uiDrawTextFont *font) -{ - font->f->Release(); - uiFree(font->family); - uiFree(font); -} - -uintptr_t uiDrawTextFontHandle(uiDrawTextFont *font) -{ - return (uintptr_t) (font->f); -} - -void uiDrawTextFontDescribe(uiDrawTextFont *font, uiDrawTextFontDescriptor *desc) -{ - // TODO - - desc->Size = font->size; - - // TODO -} - -// text sizes are 1/72 of an inch -// points in Direct2D are 1/96 of an inch (https://msdn.microsoft.com/en-us/library/windows/desktop/ff684173%28v=vs.85%29.aspx, https://msdn.microsoft.com/en-us/library/windows/desktop/hh447022%28v=vs.85%29.aspx) -// As for the actual conversion from design units, see: -// - http://cboard.cprogramming.com/windows-programming/136733-directwrite-font-height-issues.html -// - https://sourceforge.net/p/vstgui/mailman/message/32483143/ -// - http://xboxforums.create.msdn.com/forums/t/109445.aspx -// - https://msdn.microsoft.com/en-us/library/dd183564%28v=vs.85%29.aspx -// - http://www.fontbureau.com/blog/the-em/ -// TODO make points here about how DIPs in DirectWrite == DIPs in Direct2D; if not, figure out what they really are? for the width and layout functions later -static double scaleUnits(double what, double designUnitsPerEm, double size) -{ - return (what / designUnitsPerEm) * (size * (96.0 / 72.0)); -} - -void uiDrawTextFontGetMetrics(uiDrawTextFont *font, uiDrawTextFontMetrics *metrics) -{ - DWRITE_FONT_METRICS dm; - - font->f->GetMetrics(&dm); - metrics->Ascent = scaleUnits(dm.ascent, dm.designUnitsPerEm, font->size); - metrics->Descent = scaleUnits(dm.descent, dm.designUnitsPerEm, font->size); - // TODO what happens if dm.xxx is negative? - // TODO remember what this was for - metrics->Leading = scaleUnits(dm.lineGap, dm.designUnitsPerEm, font->size); - metrics->UnderlinePos = scaleUnits(dm.underlinePosition, dm.designUnitsPerEm, font->size); - metrics->UnderlineThickness = scaleUnits(dm.underlineThickness, dm.designUnitsPerEm, font->size); -} - -// some attributes, such as foreground color, can't be applied until after we establish a Direct2D context :/ so we have to prepare all attributes in advance -// also since there's no way to clear the attributes from a layout en masse (apart from overwriting them all), we'll play it safe by creating a new layout each time -enum layoutAttrType { - layoutAttrColor, -}; - -struct layoutAttr { - enum layoutAttrType type; - int start; - int end; - double components[4]; -}; - -struct uiDrawTextLayout { - WCHAR *text; - size_t textlen; - size_t *graphemes; - double width; - IDWriteTextFormat *format; - std::vector<struct layoutAttr> *attrs; -}; - -uiDrawTextLayout *uiDrawNewTextLayout(const char *text, uiDrawTextFont *defaultFont, double width) -{ - uiDrawTextLayout *layout; - HRESULT hr; - - layout = uiNew(uiDrawTextLayout); - - hr = dwfactory->CreateTextFormat(defaultFont->family, - NULL, - defaultFont->f->GetWeight(), - defaultFont->f->GetStyle(), - defaultFont->f->GetStretch(), - // typographic points are 1/72 inch; this parameter is 1/96 inch - // fortunately Microsoft does this too, in https://msdn.microsoft.com/en-us/library/windows/desktop/dd371554%28v=vs.85%29.aspx - defaultFont->size * (96.0 / 72.0), - // see http://stackoverflow.com/questions/28397971/idwritefactorycreatetextformat-failing and https://msdn.microsoft.com/en-us/library/windows/desktop/dd368203.aspx - // TODO use the current locale again? - L"", - &(layout->format)); - if (hr != S_OK) - logHRESULT(L"error creating IDWriteTextFormat", hr); - - layout->text = toUTF16(text); - layout->textlen = wcslen(layout->text); - layout->graphemes = graphemes(layout->text); - - uiDrawTextLayoutSetWidth(layout, width); - - layout->attrs = new std::vector<struct layoutAttr>; - - return layout; -} - -void uiDrawFreeTextLayout(uiDrawTextLayout *layout) -{ - delete layout->attrs; - layout->format->Release(); - uiFree(layout->graphemes); - uiFree(layout->text); - uiFree(layout); -} - -static ID2D1SolidColorBrush *mkSolidBrush(ID2D1RenderTarget *rt, double r, double g, double b, double a) -{ - D2D1_BRUSH_PROPERTIES props; - D2D1_COLOR_F color; - ID2D1SolidColorBrush *brush; - HRESULT hr; - - ZeroMemory(&props, sizeof (D2D1_BRUSH_PROPERTIES)); - props.opacity = 1.0; - // identity matrix - props.transform._11 = 1; - props.transform._22 = 1; - color.r = r; - color.g = g; - color.b = b; - color.a = a; - hr = rt->CreateSolidColorBrush( - &color, - &props, - &brush); - if (hr != S_OK) - logHRESULT(L"error creating solid brush", hr); - return brush; -} - -IDWriteTextLayout *prepareLayout(uiDrawTextLayout *layout, ID2D1RenderTarget *rt) -{ - IDWriteTextLayout *dl; - DWRITE_TEXT_RANGE range; - IUnknown *unkBrush; - DWRITE_WORD_WRAPPING wrap; - FLOAT maxWidth; - HRESULT hr; - - hr = dwfactory->CreateTextLayout(layout->text, layout->textlen, - layout->format, - // FLOAT is float, not double, so this should work... TODO - FLT_MAX, FLT_MAX, - &dl); - if (hr != S_OK) - logHRESULT(L"error creating IDWriteTextLayout", hr); - - for (const struct layoutAttr &attr : *(layout->attrs)) { - range.startPosition = layout->graphemes[attr.start]; - range.length = layout->graphemes[attr.end] - layout->graphemes[attr.start]; - switch (attr.type) { - case layoutAttrColor: - if (rt == NULL) // determining extents, not drawing - break; - unkBrush = mkSolidBrush(rt, - attr.components[0], - attr.components[1], - attr.components[2], - attr.components[3]); - hr = dl->SetDrawingEffect(unkBrush, range); - unkBrush->Release(); // associated with dl - break; - default: - hr = E_FAIL; - logHRESULT(L"invalid text attribute type", hr); - } - if (hr != S_OK) - logHRESULT(L"error adding attribute to text layout", hr); - } - - // and set the width - // this is the only wrapping mode (apart from "no wrap") available prior to Windows 8.1 - wrap = DWRITE_WORD_WRAPPING_WRAP; - maxWidth = layout->width; - if (layout->width < 0) { - wrap = DWRITE_WORD_WRAPPING_NO_WRAP; - // setting the max width in this case technically isn't needed since the wrap mode will simply ignore the max width, but let's do it just to be safe - maxWidth = FLT_MAX; // see TODO above - } - hr = dl->SetWordWrapping(wrap); - if (hr != S_OK) - logHRESULT(L"error setting word wrapping mode", hr); - hr = dl->SetMaxWidth(maxWidth); - if (hr != S_OK) - logHRESULT(L"error setting max layout width", hr); - - return dl; -} - - -void uiDrawTextLayoutSetWidth(uiDrawTextLayout *layout, double width) -{ - layout->width = width; -} - -// TODO for a single line the height includes the leading; it should not -void uiDrawTextLayoutExtents(uiDrawTextLayout *layout, double *width, double *height) -{ - IDWriteTextLayout *dl; - DWRITE_TEXT_METRICS metrics; - HRESULT hr; - - dl = prepareLayout(layout, NULL); - hr = dl->GetMetrics(&metrics); - if (hr != S_OK) - logHRESULT(L"error getting layout metrics", hr); - *width = metrics.width; - // TODO make sure the behavior of this on empty strings is the same on all platforms - *height = metrics.height; - dl->Release(); -} - -void uiDrawText(uiDrawContext *c, double x, double y, uiDrawTextLayout *layout) -{ - IDWriteTextLayout *dl; - D2D1_POINT_2F pt; - ID2D1Brush *black; - HRESULT hr; - - // TODO document that fully opaque black is the default text color; figure out whether this is upheld in various scenarios on other platforms - black = mkSolidBrush(c->rt, 0.0, 0.0, 0.0, 1.0); - - dl = prepareLayout(layout, c->rt); - pt.x = x; - pt.y = y; - // TODO D2D1_DRAW_TEXT_OPTIONS_NO_SNAP? - // TODO D2D1_DRAW_TEXT_OPTIONS_CLIP? - // TODO when setting 8.1 as minimum, D2D1_DRAW_TEXT_OPTIONS_ENABLE_COLOR_FONT? - c->rt->DrawTextLayout(pt, dl, black, D2D1_DRAW_TEXT_OPTIONS_NONE); - dl->Release(); - - black->Release(); -} - -void uiDrawTextLayoutSetColor(uiDrawTextLayout *layout, int startChar, int endChar, double r, double g, double b, double a) -{ - struct layoutAttr attr; - - attr.type = layoutAttrColor; - attr.start = startChar; - attr.end = endChar; - attr.components[0] = r; - attr.components[1] = g; - attr.components[2] = b; - attr.components[3] = a; - layout->attrs->push_back(attr); -} |