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gecko/gfx/thebes/gfxPlatformGtk.cpp
Nathan Froyd 8780083336 Bug 1161627 - part 2 - machine-convert TemporaryRef<T> to already_AddRefed<T>; r=ehsan 
This conversion was done with the script:

  find . -name '*.cpp' -o -name '*.h' -o -name '*.mm' -o -name '*.idl' | \
    egrep -v 'cairo-win32-refptr.h|RefPtr.h|TestRefPtr.cpp' | \
    xargs sed -i -e 's/mozilla::TemporaryRef</already_AddRefed</g' \
                 -e 's/TemporaryRef</already_AddRefed</g'

Manual fixups were performed in the following instances:

- We handled mfbt/RefPtr.h manually so as to not convert TemporaryRef itself
  into already_AddRefed.

- The following files had explicit Move() calls added to make up for the lack
  of a copy constructor on already_AddRefed:

  dom/base/ImageEncoder.cpp
  dom/media/MediaTaskQueue.{h,cpp}
  dom/media/webaudio/PannerNode.cpp

- A redundant overload for MediaTaskQueue::Dispatch was deleted.

- A few manual fixups were required in mfbt/tests/TestRefPtr.cpp.

- Comments, using declarations, and forward declarations relating to
  TemporaryRef in dom/canvas/ and gfx/layers/ were changed to refer to
  already_AddRefed.
2015-06-17 10:00:52 -04:00

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* 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/. */
#define PANGO_ENABLE_BACKEND
#define PANGO_ENABLE_ENGINE
#include "gfxPlatformGtk.h"
#include "prenv.h"
#include "nsUnicharUtils.h"
#include "nsUnicodeProperties.h"
#include "gfx2DGlue.h"
#include "gfxFcPlatformFontList.h"
#include "gfxFontconfigUtils.h"
#include "gfxFontconfigFonts.h"
#include "gfxContext.h"
#include "gfxUserFontSet.h"
#include "gfxUtils.h"
#include "gfxFT2FontBase.h"
#include "mozilla/gfx/2D.h"
#include "cairo.h"
#include <gtk/gtk.h>
#include "gfxImageSurface.h"
#ifdef MOZ_X11
#include <gdk/gdkx.h>
#include "gfxXlibSurface.h"
#include "cairo-xlib.h"
#include "mozilla/Preferences.h"
#include "mozilla/X11Util.h"
/* Undefine the Status from Xlib since it will conflict with system headers on OSX */
#if defined(__APPLE__) && defined(Status)
#undef Status
#endif
#endif /* MOZ_X11 */
#include <fontconfig/fontconfig.h>
#include "nsMathUtils.h"
#define GDK_PIXMAP_SIZE_MAX 32767
using namespace mozilla;
using namespace mozilla::gfx;
using namespace mozilla::unicode;
gfxFontconfigUtils *gfxPlatformGtk::sFontconfigUtils = nullptr;
#if (MOZ_WIDGET_GTK == 2)
static cairo_user_data_key_t cairo_gdk_drawable_key;
#endif
#ifdef MOZ_X11
bool gfxPlatformGtk::sUseXRender = true;
#endif
bool gfxPlatformGtk::sUseFcFontList = false;
gfxPlatformGtk::gfxPlatformGtk()
{
sUseFcFontList = mozilla::Preferences::GetBool("gfx.font_rendering.fontconfig.fontlist.enabled");
if (!sUseFcFontList && !sFontconfigUtils) {
sFontconfigUtils = gfxFontconfigUtils::GetFontconfigUtils();
}
#ifdef MOZ_X11
sUseXRender = (GDK_IS_X11_DISPLAY(gdk_display_get_default())) ?
mozilla::Preferences::GetBool("gfx.xrender.enabled") : false;
#endif
uint32_t canvasMask = BackendTypeBit(BackendType::CAIRO) | BackendTypeBit(BackendType::SKIA);
uint32_t contentMask = BackendTypeBit(BackendType::CAIRO) | BackendTypeBit(BackendType::SKIA);
InitBackendPrefs(canvasMask, BackendType::CAIRO,
contentMask, BackendType::CAIRO);
}
gfxPlatformGtk::~gfxPlatformGtk()
{
if (!sUseFcFontList) {
gfxFontconfigUtils::Shutdown();
sFontconfigUtils = nullptr;
gfxPangoFontGroup::Shutdown();
}
}
void
gfxPlatformGtk::FlushContentDrawing()
{
if (UseXRender()) {
XFlush(DefaultXDisplay());
}
}
already_AddRefed<gfxASurface>
gfxPlatformGtk::CreateOffscreenSurface(const IntSize& size,
gfxContentType contentType)
{
nsRefPtr<gfxASurface> newSurface;
bool needsClear = true;
gfxImageFormat imageFormat = OptimalFormatForContent(contentType);
#ifdef MOZ_X11
// XXX we really need a different interface here, something that passes
// in more context, including the display and/or target surface type that
// we should try to match
GdkScreen *gdkScreen = gdk_screen_get_default();
if (gdkScreen) {
// When forcing PaintedLayers to use image surfaces for content,
// force creation of gfxImageSurface surfaces.
if (UseXRender() && !UseImageOffscreenSurfaces()) {
Screen *screen = gdk_x11_screen_get_xscreen(gdkScreen);
XRenderPictFormat* xrenderFormat =
gfxXlibSurface::FindRenderFormat(DisplayOfScreen(screen),
imageFormat);
if (xrenderFormat) {
newSurface = gfxXlibSurface::Create(screen, xrenderFormat,
size);
}
} else {
// We're not going to use XRender, so we don't need to
// search for a render format
newSurface = new gfxImageSurface(size, imageFormat);
// The gfxImageSurface ctor zeroes this for us, no need to
// waste time clearing again
needsClear = false;
}
}
#endif
if (!newSurface) {
// We couldn't create a native surface for whatever reason;
// e.g., no display, no RENDER, bad size, etc.
// Fall back to image surface for the data.
newSurface = new gfxImageSurface(size, imageFormat);
}
if (newSurface->CairoStatus()) {
newSurface = nullptr; // surface isn't valid for some reason
}
if (newSurface && needsClear) {
gfxUtils::ClearThebesSurface(newSurface);
}
return newSurface.forget();
}
nsresult
gfxPlatformGtk::GetFontList(nsIAtom *aLangGroup,
const nsACString& aGenericFamily,
nsTArray<nsString>& aListOfFonts)
{
if (sUseFcFontList) {
gfxPlatformFontList::PlatformFontList()->GetFontList(aLangGroup,
aGenericFamily,
aListOfFonts);
return NS_OK;
}
return sFontconfigUtils->GetFontList(aLangGroup,
aGenericFamily,
aListOfFonts);
}
nsresult
gfxPlatformGtk::UpdateFontList()
{
if (sUseFcFontList) {
gfxPlatformFontList::PlatformFontList()->UpdateFontList();
return NS_OK;
}
return sFontconfigUtils->UpdateFontList();
}
// xxx - this is ubuntu centric, need to go through other distros and flesh
// out a more general list
static const char kFontDejaVuSans[] = "DejaVu Sans";
static const char kFontDejaVuSerif[] = "DejaVu Serif";
static const char kFontFreeSans[] = "FreeSans";
static const char kFontFreeSerif[] = "FreeSerif";
static const char kFontTakaoPGothic[] = "TakaoPGothic";
static const char kFontDroidSansFallback[] = "Droid Sans Fallback";
static const char kFontWenQuanYiMicroHei[] = "WenQuanYi Micro Hei";
static const char kFontNanumGothic[] = "NanumGothic";
void
gfxPlatformGtk::GetCommonFallbackFonts(uint32_t aCh, uint32_t aNextCh,
int32_t aRunScript,
nsTArray<const char*>& aFontList)
{
aFontList.AppendElement(kFontDejaVuSerif);
aFontList.AppendElement(kFontFreeSerif);
aFontList.AppendElement(kFontDejaVuSans);
aFontList.AppendElement(kFontFreeSans);
// add fonts for CJK ranges
// xxx - this isn't really correct, should use the same CJK font ordering
// as the pref font code
if (aCh >= 0x3000 &&
((aCh < 0xe000) ||
(aCh >= 0xf900 && aCh < 0xfff0) ||
((aCh >> 16) == 2))) {
aFontList.AppendElement(kFontTakaoPGothic);
aFontList.AppendElement(kFontDroidSansFallback);
aFontList.AppendElement(kFontWenQuanYiMicroHei);
aFontList.AppendElement(kFontNanumGothic);
}
}
gfxPlatformFontList*
gfxPlatformGtk::CreatePlatformFontList()
{
gfxPlatformFontList* list = new gfxFcPlatformFontList();
if (NS_SUCCEEDED(list->InitFontList())) {
return list;
}
gfxPlatformFontList::Shutdown();
return nullptr;
}
nsresult
gfxPlatformGtk::GetStandardFamilyName(const nsAString& aFontName, nsAString& aFamilyName)
{
if (sUseFcFontList) {
gfxPlatformFontList::PlatformFontList()->
GetStandardFamilyName(aFontName, aFamilyName);
return NS_OK;
}
return sFontconfigUtils->GetStandardFamilyName(aFontName, aFamilyName);
}
gfxFontGroup *
gfxPlatformGtk::CreateFontGroup(const FontFamilyList& aFontFamilyList,
const gfxFontStyle *aStyle,
gfxUserFontSet *aUserFontSet)
{
if (sUseFcFontList) {
return new gfxFontGroup(aFontFamilyList, aStyle, aUserFontSet);
}
return new gfxPangoFontGroup(aFontFamilyList, aStyle, aUserFontSet);
}
gfxFontEntry*
gfxPlatformGtk::LookupLocalFont(const nsAString& aFontName,
uint16_t aWeight,
int16_t aStretch,
bool aItalic)
{
if (sUseFcFontList) {
gfxPlatformFontList* pfl = gfxPlatformFontList::PlatformFontList();
return pfl->LookupLocalFont(aFontName, aWeight, aStretch, aItalic);
}
return gfxPangoFontGroup::NewFontEntry(aFontName, aWeight,
aStretch, aItalic);
}
gfxFontEntry*
gfxPlatformGtk::MakePlatformFont(const nsAString& aFontName,
uint16_t aWeight,
int16_t aStretch,
bool aItalic,
const uint8_t* aFontData,
uint32_t aLength)
{
if (sUseFcFontList) {
gfxPlatformFontList* pfl = gfxPlatformFontList::PlatformFontList();
return pfl->MakePlatformFont(aFontName, aWeight, aStretch, aItalic,
aFontData, aLength);
}
// passing ownership of the font data to the new font entry
return gfxPangoFontGroup::NewFontEntry(aFontName, aWeight,
aStretch, aItalic,
aFontData, aLength);
}
bool
gfxPlatformGtk::IsFontFormatSupported(nsIURI *aFontURI, uint32_t aFormatFlags)
{
// check for strange format flags
NS_ASSERTION(!(aFormatFlags & gfxUserFontSet::FLAG_FORMAT_NOT_USED),
"strange font format hint set");
// accept supported formats
// Pango doesn't apply features from AAT TrueType extensions.
// Assume that if this is the only SFNT format specified,
// then AAT extensions are required for complex script support.
if (aFormatFlags & gfxUserFontSet::FLAG_FORMATS_COMMON) {
return true;
}
// reject all other formats, known and unknown
if (aFormatFlags != 0) {
return false;
}
// no format hint set, need to look at data
return true;
}
static int32_t sDPI = 0;
int32_t
gfxPlatformGtk::GetDPI()
{
if (!sDPI) {
// Make sure init is run so we have a resolution
GdkScreen *screen = gdk_screen_get_default();
gtk_settings_get_for_screen(screen);
sDPI = int32_t(round(gdk_screen_get_resolution(screen)));
if (sDPI <= 0) {
// Fall back to something sane
sDPI = 96;
}
}
return sDPI;
}
double
gfxPlatformGtk::GetDPIScale()
{
// We want to set the default CSS to device pixel ratio as the
// closest _integer_ multiple, so round the ratio of actual dpi
// to CSS dpi (96)
int32_t dpi = GetDPI();
return (dpi > 96) ? round(dpi/96.0) : 1.0;
}
gfxImageFormat
gfxPlatformGtk::GetOffscreenFormat()
{
// Make sure there is a screen
GdkScreen *screen = gdk_screen_get_default();
if (screen && gdk_visual_get_depth(gdk_visual_get_system()) == 16) {
return gfxImageFormat::RGB16_565;
}
return gfxImageFormat::RGB24;
}
static int sDepth = 0;
int
gfxPlatformGtk::GetScreenDepth() const
{
if (!sDepth) {
GdkScreen *screen = gdk_screen_get_default();
if (screen) {
sDepth = gdk_visual_get_depth(gdk_visual_get_system());
} else {
sDepth = 24;
}
}
return sDepth;
}
void
gfxPlatformGtk::GetPlatformCMSOutputProfile(void *&mem, size_t &size)
{
mem = nullptr;
size = 0;
#ifdef MOZ_X11
GdkDisplay *display = gdk_display_get_default();
if (!GDK_IS_X11_DISPLAY(display))
return;
const char EDID1_ATOM_NAME[] = "XFree86_DDC_EDID1_RAWDATA";
const char ICC_PROFILE_ATOM_NAME[] = "_ICC_PROFILE";
Atom edidAtom, iccAtom;
Display *dpy = GDK_DISPLAY_XDISPLAY(display);
// In xpcshell tests, we never initialize X and hence don't have a Display.
// In this case, there's no output colour management to be done, so we just
// return with nullptr.
if (!dpy)
return;
Window root = gdk_x11_get_default_root_xwindow();
Atom retAtom;
int retFormat;
unsigned long retLength, retAfter;
unsigned char *retProperty ;
iccAtom = XInternAtom(dpy, ICC_PROFILE_ATOM_NAME, TRUE);
if (iccAtom) {
// read once to get size, once for the data
if (Success == XGetWindowProperty(dpy, root, iccAtom,
0, INT_MAX /* length */,
False, AnyPropertyType,
&retAtom, &retFormat, &retLength,
&retAfter, &retProperty)) {
if (retLength > 0) {
void *buffer = malloc(retLength);
if (buffer) {
memcpy(buffer, retProperty, retLength);
mem = buffer;
size = retLength;
}
}
XFree(retProperty);
if (size > 0) {
#ifdef DEBUG_tor
fprintf(stderr,
"ICM profile read from %s successfully\n",
ICC_PROFILE_ATOM_NAME);
#endif
return;
}
}
}
edidAtom = XInternAtom(dpy, EDID1_ATOM_NAME, TRUE);
if (edidAtom) {
if (Success == XGetWindowProperty(dpy, root, edidAtom, 0, 32,
False, AnyPropertyType,
&retAtom, &retFormat, &retLength,
&retAfter, &retProperty)) {
double gamma;
qcms_CIE_xyY whitePoint;
qcms_CIE_xyYTRIPLE primaries;
if (retLength != 128) {
#ifdef DEBUG_tor
fprintf(stderr, "Short EDID data\n");
#endif
return;
}
// Format documented in "VESA E-EDID Implementation Guide"
gamma = (100 + retProperty[0x17]) / 100.0;
whitePoint.x = ((retProperty[0x21] << 2) |
(retProperty[0x1a] >> 2 & 3)) / 1024.0;
whitePoint.y = ((retProperty[0x22] << 2) |
(retProperty[0x1a] >> 0 & 3)) / 1024.0;
whitePoint.Y = 1.0;
primaries.red.x = ((retProperty[0x1b] << 2) |
(retProperty[0x19] >> 6 & 3)) / 1024.0;
primaries.red.y = ((retProperty[0x1c] << 2) |
(retProperty[0x19] >> 4 & 3)) / 1024.0;
primaries.red.Y = 1.0;
primaries.green.x = ((retProperty[0x1d] << 2) |
(retProperty[0x19] >> 2 & 3)) / 1024.0;
primaries.green.y = ((retProperty[0x1e] << 2) |
(retProperty[0x19] >> 0 & 3)) / 1024.0;
primaries.green.Y = 1.0;
primaries.blue.x = ((retProperty[0x1f] << 2) |
(retProperty[0x1a] >> 6 & 3)) / 1024.0;
primaries.blue.y = ((retProperty[0x20] << 2) |
(retProperty[0x1a] >> 4 & 3)) / 1024.0;
primaries.blue.Y = 1.0;
XFree(retProperty);
#ifdef DEBUG_tor
fprintf(stderr, "EDID gamma: %f\n", gamma);
fprintf(stderr, "EDID whitepoint: %f %f %f\n",
whitePoint.x, whitePoint.y, whitePoint.Y);
fprintf(stderr, "EDID primaries: [%f %f %f] [%f %f %f] [%f %f %f]\n",
primaries.Red.x, primaries.Red.y, primaries.Red.Y,
primaries.Green.x, primaries.Green.y, primaries.Green.Y,
primaries.Blue.x, primaries.Blue.y, primaries.Blue.Y);
#endif
qcms_data_create_rgb_with_gamma(whitePoint, primaries, gamma, &mem, &size);
#ifdef DEBUG_tor
if (size > 0) {
fprintf(stderr,
"ICM profile read from %s successfully\n",
EDID1_ATOM_NAME);
}
#endif
}
}
#endif
}
#if (MOZ_WIDGET_GTK == 2)
void
gfxPlatformGtk::SetGdkDrawable(cairo_surface_t *target,
GdkDrawable *drawable)
{
if (cairo_surface_status(target))
return;
g_object_ref(drawable);
cairo_surface_set_user_data (target,
&cairo_gdk_drawable_key,
drawable,
g_object_unref);
}
GdkDrawable *
gfxPlatformGtk::GetGdkDrawable(cairo_surface_t *target)
{
if (cairo_surface_status(target))
return nullptr;
GdkDrawable *result;
result = (GdkDrawable*) cairo_surface_get_user_data (target,
&cairo_gdk_drawable_key);
if (result)
return result;
#ifdef MOZ_X11
if (cairo_surface_get_type(target) != CAIRO_SURFACE_TYPE_XLIB)
return nullptr;
// try looking it up in gdk's table
result = (GdkDrawable*) gdk_xid_table_lookup(cairo_xlib_surface_get_drawable(target));
if (result) {
SetGdkDrawable(target, result);
return result;
}
#endif
return nullptr;
}
#endif
already_AddRefed<ScaledFont>
gfxPlatformGtk::GetScaledFontForFont(DrawTarget* aTarget, gfxFont *aFont)
{
return GetScaledFontForFontWithCairoSkia(aTarget, aFont);
}
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