gecko-dev/gfx/thebes/gfxOS2Platform.cpp

189 lines
6.0 KiB
C++

/* vim: set sw=4 sts=4 et cin: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "gfxOS2Platform.h"
#include "gfxOS2Surface.h"
#include "gfxImageSurface.h"
#include "gfxOS2Fonts.h"
#include "nsTArray.h"
#include "gfxFontconfigUtils.h"
//#include <fontconfig/fontconfig.h>
/**********************************************************************
* class gfxOS2Platform
**********************************************************************/
gfxFontconfigUtils *gfxOS2Platform::sFontconfigUtils = nullptr;
gfxOS2Platform::gfxOS2Platform()
{
#ifdef DEBUG_thebes
printf("gfxOS2Platform::gfxOS2Platform()\n");
#endif
// this seems to be reasonably early in the process and only once,
// so it's a good place to initialize OS/2 cairo stuff
cairo_os2_init();
#ifdef DEBUG_thebes
printf(" cairo_os2_init() was called\n");
#endif
if (!sFontconfigUtils) {
sFontconfigUtils = gfxFontconfigUtils::GetFontconfigUtils();
}
}
gfxOS2Platform::~gfxOS2Platform()
{
#ifdef DEBUG_thebes
printf("gfxOS2Platform::~gfxOS2Platform()\n");
#endif
gfxFontconfigUtils::Shutdown();
sFontconfigUtils = nullptr;
// clean up OS/2 cairo stuff
cairo_os2_fini();
#ifdef DEBUG_thebes
printf(" cairo_os2_fini() was called\n");
#endif
}
already_AddRefed<gfxASurface>
gfxOS2Platform::CreateOffscreenSurface(const gfxIntSize& aSize,
gfxASurface::gfxContentType contentType)
{
#ifdef DEBUG_thebes_2
printf("gfxOS2Platform::CreateOffscreenSurface(%d/%d, %d)\n",
aSize.width, aSize.height, aImageFormat);
#endif
gfxASurface *newSurface = nullptr;
// we only ever seem to get aImageFormat=0 or ImageFormatARGB32 but
// I don't really know if we need to differ between ARGB32 and RGB24 here
if (contentType == gfxASurface::CONTENT_COLOR_ALPHA ||
contentType == gfxASurface::CONTENT_COLOR)
{
newSurface = new gfxOS2Surface(aSize, OptimalFormatForContent(contentType));
} else if (contentType == gfxASurface::CONTENT_ALPHA) {
newSurface = new gfxImageSurface(aSize, OptimalFormatForContent(contentType));
} else {
return nullptr;
}
NS_IF_ADDREF(newSurface);
return newSurface;
}
nsresult
gfxOS2Platform::GetFontList(nsIAtom *aLangGroup,
const nsACString& aGenericFamily,
nsTArray<nsString>& aListOfFonts)
{
#ifdef DEBUG_thebes
const char *langgroup = "(null)";
if (aLangGroup) {
aLangGroup->GetUTF8String(&langgroup);
}
char *family = ToNewCString(aGenericFamily);
printf("gfxOS2Platform::GetFontList(%s, %s, ..)\n",
langgroup, family);
free(family);
#endif
return sFontconfigUtils->GetFontList(aLangGroup, aGenericFamily,
aListOfFonts);
}
nsresult gfxOS2Platform::UpdateFontList()
{
#ifdef DEBUG_thebes
printf("gfxOS2Platform::UpdateFontList()\n");
#endif
mCodepointsWithNoFonts.reset();
nsresult rv = sFontconfigUtils->UpdateFontList();
// initialize ranges of characters for which system-wide font search should be skipped
mCodepointsWithNoFonts.SetRange(0,0x1f); // C0 controls
mCodepointsWithNoFonts.SetRange(0x7f,0x9f); // C1 controls
return rv;
}
nsresult
gfxOS2Platform::ResolveFontName(const nsAString& aFontName,
FontResolverCallback aCallback,
void *aClosure, bool& aAborted)
{
#ifdef DEBUG_thebes
char *fontname = ToNewCString(aFontName);
printf("gfxOS2Platform::ResolveFontName(%s, ...)\n", fontname);
free(fontname);
#endif
return sFontconfigUtils->ResolveFontName(aFontName, aCallback, aClosure,
aAborted);
}
nsresult
gfxOS2Platform::GetStandardFamilyName(const nsAString& aFontName, nsAString& aFamilyName)
{
return sFontconfigUtils->GetStandardFamilyName(aFontName, aFamilyName);
}
gfxFontGroup *
gfxOS2Platform::CreateFontGroup(const nsAString &aFamilies,
const gfxFontStyle *aStyle,
gfxUserFontSet *aUserFontSet)
{
return new gfxOS2FontGroup(aFamilies, aStyle, aUserFontSet);
}
already_AddRefed<gfxOS2Font>
gfxOS2Platform::FindFontForChar(uint32_t aCh, gfxOS2Font *aFont)
{
#ifdef DEBUG_thebes
printf("gfxOS2Platform::FindFontForChar(%d, ...)\n", aCh);
#endif
// is codepoint with no matching font? return null immediately
if (mCodepointsWithNoFonts.test(aCh)) {
return nullptr;
}
// the following is not very clever but it's a quick fix to search all fonts
// (one should instead cache the charmaps as done on Mac and Win)
// just continue to append all fonts known to the system
nsTArray<nsString> fontList;
nsAutoCString generic;
nsresult rv = GetFontList(aFont->GetStyle()->language, generic, fontList);
if (NS_SUCCEEDED(rv)) {
// start at 3 to skip over the generic entries
for (uint32_t i = 3; i < fontList.Length(); i++) {
#ifdef DEBUG_thebes
printf("searching in entry i=%d (%s)\n",
i, NS_LossyConvertUTF16toASCII(fontList[i]).get());
#endif
nsRefPtr<gfxOS2Font> font =
gfxOS2Font::GetOrMakeFont(fontList[i], aFont->GetStyle());
if (!font)
continue;
FT_Face face = cairo_ft_scaled_font_lock_face(font->CairoScaledFont());
if (!face || !face->charmap) {
if (face)
cairo_ft_scaled_font_unlock_face(font->CairoScaledFont());
continue;
}
FT_UInt gid = FT_Get_Char_Index(face, aCh); // find the glyph id
if (gid != 0) {
// this is the font
cairo_ft_scaled_font_unlock_face(font->CairoScaledFont());
return font.forget();
}
}
}
// no match found, so add to the set of non-matching codepoints
mCodepointsWithNoFonts.set(aCh);
return nullptr;
}