void AsyncPanZoomController::ScaleWithFocus(float aScale, const nsIntPoint& aFocus) {
FrameMetrics metrics(mFrameMetrics);
// Don't set the scale to the inputted value, but rather multiply it in.
float scaleFactor = aScale / metrics.mResolution.width;
// The page rect is the css page rect scaled by the current zoom.
gfx::Rect cssPageSize = metrics.mCSSContentRect;
cssPageSize.x *= aScale;
cssPageSize.y *= aScale;
cssPageSize.width *= aScale;
cssPageSize.height *= aScale;
metrics.mContentRect = nsIntRect(NS_lround(cssPageSize.x),
NS_lround(cssPageSize.y),
NS_lround(cssPageSize.width),
NS_lround(cssPageSize.height));
// To account for focus, offset the page by the focus point scaled.
nsIntPoint scrollOffset = metrics.mViewportScrollOffset,
originalOffset = scrollOffset;
scrollOffset.x += aFocus.x + (scaleFactor < 1 ? 1 : -1) * originalOffset.x / aScale;
scrollOffset.y += aFocus.y + (scaleFactor < 1 ? 1 : -1) * originalOffset.y / aScale;
scrollOffset.x *= scaleFactor;
scrollOffset.y *= scaleFactor;
scrollOffset.x -= aFocus.x + (scaleFactor < 1 ? 1 : -1) * originalOffset.x / aScale;
scrollOffset.y -= aFocus.y + (scaleFactor < 1 ? 1 : -1) * originalOffset.y / aScale;
metrics.mViewportScrollOffset = scrollOffset;
metrics.mResolution.width = metrics.mResolution.height = aScale;
SetFrameMetrics(metrics);
}
void
AudioBufferSourceNode::SendLoopParametersToStream()
{
// Don't compute and set the loop parameters unnecessarily
if (mLoop && mBuffer) {
float rate = mBuffer->SampleRate();
double length = (double(mBuffer->Length()) / mBuffer->SampleRate());
double actualLoopStart, actualLoopEnd;
if (((mLoopStart != 0.0) || (mLoopEnd != 0.0)) &&
mLoopStart >= 0.0 && mLoopEnd > 0.0 &&
mLoopStart < mLoopEnd) {
actualLoopStart = (mLoopStart > length) ? 0.0 : mLoopStart;
actualLoopEnd = std::min(mLoopEnd, length);
} else {
actualLoopStart = 0.0;
actualLoopEnd = length;
}
int32_t loopStartTicks = NS_lround(actualLoopStart * rate);
int32_t loopEndTicks = NS_lround(actualLoopEnd * rate);
if (loopStartTicks < loopEndTicks) {
SendInt32ParameterToStream(LOOPSTART, loopStartTicks);
SendInt32ParameterToStream(LOOPEND, loopEndTicks);
SendInt32ParameterToStream(LOOP, 1);
}
} else if (!mLoop) {
SendInt32ParameterToStream(LOOP, 0);
}
}
void
AudioBufferSourceNode::SendLoopParametersToStream()
{
// Don't compute and set the loop parameters unnecessarily
if (mLoop && mBuffer) {
float rate = mBuffer->SampleRate();
double length = (double(mBuffer->Length()) / mBuffer->SampleRate());
double actualLoopStart, actualLoopEnd;
if (mLoopStart >= 0.0 && mLoopEnd > 0.0 &&
mLoopStart < mLoopEnd) {
MOZ_ASSERT(mLoopStart != 0.0 || mLoopEnd != 0.0);
actualLoopStart = (mLoopStart > length) ? 0.0 : mLoopStart;
actualLoopEnd = std::min(mLoopEnd, length);
} else {
actualLoopStart = 0.0;
actualLoopEnd = length;
}
int32_t loopStartTicks = NS_lround(actualLoopStart * rate);
int32_t loopEndTicks = NS_lround(actualLoopEnd * rate);
if (loopStartTicks < loopEndTicks) {
SendInt32ParameterToStream(LOOPSTART, loopStartTicks);
SendInt32ParameterToStream(LOOPEND, loopEndTicks);
SendInt32ParameterToStream(LOOP, 1);
} else {
// Be explicit about looping not happening if the offsets make
// looping impossible.
SendInt32ParameterToStream(LOOP, 0);
}
} else if (!mLoop) {
SendInt32ParameterToStream(LOOP, 0);
}
}
gfxRect
ThebesLayerComposite::GetCompositionBounds()
{
// Walk up the tree, looking for a display-port - if we find one, we know
// that this layer represents a content node and we can use its first
// scrollable child, in conjunction with its content area and viewport offset
// to establish the screen coordinates to which the content area will be
// rendered.
gfxRect compositionBounds;
ContainerLayer* scrollableLayer = nullptr;
for (ContainerLayer* parent = GetParent(); parent; parent = parent->GetParent()) {
const FrameMetrics& parentMetrics = parent->GetFrameMetrics();
if (parentMetrics.IsScrollable())
scrollableLayer = parent;
if (!parentMetrics.mDisplayPort.IsEmpty() && scrollableLayer) {
// Get the composition bounds, so as not to waste rendering time.
compositionBounds = gfxRect(parentMetrics.mCompositionBounds.x,
parentMetrics.mCompositionBounds.y,
parentMetrics.mCompositionBounds.width,
parentMetrics.mCompositionBounds.height);
// Calculate the scale transform applied to the root layer to determine
// the content resolution.
Layer* rootLayer = Manager()->GetRoot();
const gfx3DMatrix& rootTransform = rootLayer->GetTransform();
LayerToCSSScale scale(rootTransform.GetXScale(),
rootTransform.GetYScale());
// Get the content document bounds, in screen-space.
const FrameMetrics& metrics = scrollableLayer->GetFrameMetrics();
const LayerIntRect content = RoundedToInt(metrics.mScrollableRect / scale);
// !!! WTF. this code is just wrong. See bug 881451.
gfx::Point scrollOffset =
gfx::Point((metrics.mScrollOffset.x * metrics.LayersPixelsPerCSSPixel().scale) / scale.scale,
(metrics.mScrollOffset.y * metrics.LayersPixelsPerCSSPixel().scale) / scale.scale);
const nsIntPoint contentOrigin(
content.x - NS_lround(scrollOffset.x),
content.y - NS_lround(scrollOffset.y));
gfxRect contentRect = gfxRect(contentOrigin.x, contentOrigin.y,
content.width, content.height);
gfxRect contentBounds = scrollableLayer->GetEffectiveTransform().
TransformBounds(contentRect);
// Clip the composition bounds to the content bounds
compositionBounds.IntersectRect(compositionBounds, contentBounds);
break;
}
}
return compositionBounds;
}
void
AudioBufferSourceNode::SendOffsetAndDurationParametersToStream(AudioNodeStream* aStream)
{
NS_ASSERTION(mBuffer && mStartCalled,
"Only call this when we have a buffer and start() has been called");
float rate = mBuffer->SampleRate();
aStream->SetInt32Parameter(SAMPLE_RATE, rate);
int32_t bufferEnd = mBuffer->Length();
int32_t offsetSamples = std::max(0, NS_lround(mOffset * rate));
// Don't set parameter unnecessarily
if (offsetSamples > 0) {
aStream->SetInt32Parameter(BUFFERSTART, offsetSamples);
}
if (mDuration != std::numeric_limits<double>::min()) {
MOZ_ASSERT(mDuration >= 0.0); // provided by Start()
MOZ_ASSERT(rate >= 0.0f); // provided by AudioBuffer::Create()
static_assert(std::numeric_limits<double>::digits >=
std::numeric_limits<decltype(bufferEnd)>::digits,
"bufferEnd should be represented exactly by double");
// + 0.5 rounds mDuration to nearest sample when assigned to bufferEnd.
bufferEnd = std::min<double>(bufferEnd,
offsetSamples + mDuration * rate + 0.5);
}
aStream->SetInt32Parameter(BUFFEREND, bufferEnd);
MarkActive();
}
PRInt32
gfxFT2FontBase::GetGlyphWidth(gfxContext *aCtx, PRUint16 aGID)
{
cairo_text_extents_t extents;
GetGlyphExtents(aGID, &extents);
// convert to 16.16 fixed point
return NS_lround(0x10000 * extents.x_advance);
}
float Axis::ScaleWillOverscrollAmount(float aScale, int32_t aFocus) {
float originAfterScale = (GetOrigin() + aFocus) * aScale - aFocus;
switch (ScaleWillOverscroll(aScale, aFocus)) {
case OVERSCROLL_MINUS: return originAfterScale - GetPageStart() * aScale;
case OVERSCROLL_PLUS: return (originAfterScale + GetCompositionLength()) -
NS_lround(GetPageEnd() * aScale);
// Don't handle OVERSCROLL_BOTH. Client code is expected to deal with it.
default: return 0;
}
}
nsresult
SVGIntegerPairSMILType::Interpolate(const nsSMILValue& aStartVal,
const nsSMILValue& aEndVal,
double aUnitDistance,
nsSMILValue& aResult) const
{
NS_PRECONDITION(aStartVal.mType == aEndVal.mType,
"Trying to interpolate different types");
NS_PRECONDITION(aStartVal.mType == this,
"Unexpected types for interpolation");
NS_PRECONDITION(aResult.mType == this, "Unexpected result type");
double currentVal[2];
currentVal[0] = aStartVal.mU.mIntPair[0] +
(aEndVal.mU.mIntPair[0] - aStartVal.mU.mIntPair[0]) * aUnitDistance;
currentVal[1] = aStartVal.mU.mIntPair[1] +
(aEndVal.mU.mIntPair[1] - aStartVal.mU.mIntPair[1]) * aUnitDistance;
aResult.mU.mIntPair[0] = NS_lround(currentVal[0]);
aResult.mU.mIntPair[1] = NS_lround(currentVal[1]);
return NS_OK;
}
void
AudioBufferSourceNode::SendOffsetAndDurationParametersToStream(AudioNodeStream* aStream)
{
NS_ASSERTION(mBuffer && mStartCalled,
"Only call this when we have a buffer and start() has been called");
float rate = mBuffer->SampleRate();
int32_t bufferEnd = mBuffer->Length();
int32_t offsetSamples = std::max(0, NS_lround(mOffset * rate));
// Don't set parameter unnecessarily
if (offsetSamples > 0) {
aStream->SetInt32Parameter(BUFFERSTART, offsetSamples);
}
if (mDuration != std::numeric_limits<double>::min()) {
bufferEnd = std::min(bufferEnd,
offsetSamples + NS_lround(mDuration * rate));
}
aStream->SetInt32Parameter(BUFFEREND, bufferEnd);
MarkActive();
}
nsresult
CanvasRenderingContextHelper::ParseParams(JSContext* aCx,
const nsAString& aType,
const JS::Value& aEncoderOptions,
nsAString& outParams,
bool* const outUsingCustomParseOptions)
{
// Quality parameter is only valid for the image/jpeg MIME type
if (aType.EqualsLiteral("image/jpeg")) {
if (aEncoderOptions.isNumber()) {
double quality = aEncoderOptions.toNumber();
// Quality must be between 0.0 and 1.0, inclusive
if (quality >= 0.0 && quality <= 1.0) {
outParams.AppendLiteral("quality=");
outParams.AppendInt(NS_lround(quality * 100.0));
}
}
}
// If we haven't parsed the aParams check for proprietary options.
// The proprietary option -moz-parse-options will take a image lib encoder
// parse options string as is and pass it to the encoder.
*outUsingCustomParseOptions = false;
if (outParams.Length() == 0 && aEncoderOptions.isString()) {
NS_NAMED_LITERAL_STRING(mozParseOptions, "-moz-parse-options:");
nsAutoJSString paramString;
if (!paramString.init(aCx, aEncoderOptions.toString())) {
return NS_ERROR_FAILURE;
}
if (StringBeginsWith(paramString, mozParseOptions)) {
nsDependentSubstring parseOptions = Substring(paramString,
mozParseOptions.Length(),
paramString.Length() -
mozParseOptions.Length());
outParams.Append(parseOptions);
*outUsingCustomParseOptions = true;
}
}
return NS_OK;
}
void
nsFontSizeTextAttr::Format(const nscoord& aValue, nsAString& aFormattedValue)
{
// Convert from nscoord to pt.
//
// Note: according to IA2, "The conversion doesn't have to be exact.
// The intent is to give the user a feel for the size of the text."
//
// ATK does not specify a unit and will likely follow IA2 here.
//
// XXX todo: consider sharing this code with layout module? (bug 474621)
float px =
NSAppUnitsToFloatPixels(aValue, nsDeviceContext::AppUnitsPerCSSPixel());
// Each pt is 4/3 of a CSS pixel.
int pts = NS_lround(px*3/4);
nsAutoString value;
value.AppendInt(pts);
value.Append(NS_LITERAL_STRING("pt"));
aFormattedValue = value;
}
const nsIntRect AsyncPanZoomController::CalculatePendingDisplayPort() {
float scale = mFrameMetrics.mResolution.width;
nsIntRect viewport = mFrameMetrics.mViewport;
viewport.ScaleRoundIn(1 / scale);
#ifdef USE_LARGER_DISPLAYPORT
const float SIZE_MULTIPLIER = 2.0f;
nsIntPoint scrollOffset = mFrameMetrics.mViewportScrollOffset;
gfx::Rect contentRect = mFrameMetrics.mCSSContentRect;
// Paint a larger portion of the screen than just what we can see. This makes
// it less likely that we'll checkerboard when panning around and Gecko hasn't
// repainted yet.
float desiredWidth = viewport.width * SIZE_MULTIPLIER,
desiredHeight = viewport.height * SIZE_MULTIPLIER;
// The displayport is relative to the current scroll offset. Here's a little
// diagram to make it easier to see:
//
// - - - -
// | |
// *************
// * | | *
// - -*- @------ -*- -
// | * |=====| * |
// * |=====| *
// | * |=====| * |
// - -*- ------- -*- -
// * | | *
// *************
// | |
// - - - -
//
// The full --- area with === inside it is the actual viewport rect, the *** area
// is the displayport, and the - - - area is an imaginary additional page on all 4
// borders of the actual page. Notice that the displayport intersects half-way with
// each of the imaginary extra pages. The @ symbol at the top left of the
// viewport marks the current scroll offset. From the @ symbol to the far left
// and far top, it is clear that this distance is 1/4 of the displayport's
// height/width dimension.
gfx::Rect displayPort(-desiredWidth / 4, -desiredHeight / 4, desiredWidth, desiredHeight);
// Check if the desired boundaries go over the CSS page rect along the top or
// left. If they do, shift them to the right or down.
float oldDisplayPortX = displayPort.x, oldDisplayPortY = displayPort.y;
if (displayPort.X() + scrollOffset.x < contentRect.X())
displayPort.x = contentRect.X() - scrollOffset.x;
if (displayPort.Y() + scrollOffset.y < contentRect.Y())
displayPort.y = contentRect.Y() - scrollOffset.y;
// We don't need to paint the extra area that was going to overlap with the
// content rect. Subtract out this extra width or height.
displayPort.width -= displayPort.x - oldDisplayPortX;
displayPort.height -= displayPort.y - oldDisplayPortY;
// Check if the desired boundaries go over the CSS page rect along the right
// or bottom. If they do, subtract out some height or width such that they
// perfectly align with the end of the CSS page rect.
if (displayPort.XMost() + scrollOffset.x > contentRect.XMost())
displayPort.width = NS_MAX(0.0f, contentRect.XMost() - (displayPort.X() + scrollOffset.x));
if (displayPort.YMost() + scrollOffset.y > contentRect.YMost())
displayPort.height = NS_MAX(0.0f, contentRect.YMost() - (displayPort.Y() + scrollOffset.y));
return nsIntRect(NS_lround(displayPort.X()), NS_lround(displayPort.Y()), NS_lround(displayPort.Width()), NS_lround(displayPort.Height()));
#else
return nsIntRect(0, 0, NS_lround(viewport.Width()), NS_lround(viewport.Height()));
#endif
}
nsresult
nsThebesDeviceContext::SetDPI()
{
float dpi = -1.0f;
// PostScript, PDF and Mac (when printing) all use 72 dpi
// Use a printing DC to determine the other dpi values
if (mPrintingSurface) {
switch (mPrintingSurface->GetType()) {
case gfxASurface::SurfaceTypePDF:
case gfxASurface::SurfaceTypePS:
case gfxASurface::SurfaceTypeQuartz:
dpi = 72.0f;
break;
#ifdef XP_WIN
case gfxASurface::SurfaceTypeWin32:
case gfxASurface::SurfaceTypeWin32Printing: {
PRInt32 OSVal = GetDeviceCaps(GetPrintHDC(), LOGPIXELSY);
dpi = 144.0f;
mPrintingScale = float(OSVal) / dpi;
break;
}
#endif
#ifdef XP_OS2
case gfxASurface::SurfaceTypeOS2:
LONG lDPI;
if (DevQueryCaps(GetPrintHDC(), CAPS_VERTICAL_FONT_RES, 1, &lDPI))
dpi = lDPI;
break;
#endif
default:
NS_NOTREACHED("Unexpected printing surface type");
break;
}
mAppUnitsPerDevNotScaledPixel =
NS_lround((AppUnitsPerCSSPixel() * 96) / dpi);
} else {
nsCOMPtr<nsIPrefBranch> prefs = do_GetService(NS_PREFSERVICE_CONTRACTID);
// A value of -1 means use the maximum of 96 and the system DPI.
// A value of 0 means use the system DPI. A positive value is used as the DPI.
// This sets the physical size of a device pixel and thus controls the
// interpretation of physical units.
PRInt32 prefDPI = -1;
if (prefs) {
nsresult rv = prefs->GetIntPref("layout.css.dpi", &prefDPI);
if (NS_FAILED(rv)) {
prefDPI = -1;
}
}
if (prefDPI > 0) {
dpi = prefDPI;
} else if (mWidget) {
dpi = mWidget->GetDPI();
if (prefDPI < 0) {
dpi = PR_MAX(96.0f, dpi);
}
} else {
dpi = 96.0f;
}
// The number of device pixels per CSS pixel. A value <= 0 means choose
// automatically based on the DPI. A positive value is used as-is. This effectively
// controls the size of a CSS "px".
float devPixelsPerCSSPixel = -1.0;
if (prefs) {
nsXPIDLCString prefString;
nsresult rv = prefs->GetCharPref("layout.css.devPixelsPerPx", getter_Copies(prefString));
if (NS_SUCCEEDED(rv) && !prefString.IsEmpty()) {
devPixelsPerCSSPixel = static_cast<float>(atof(prefString));
}
}
if (devPixelsPerCSSPixel <= 0) {
if (mWidget) {
devPixelsPerCSSPixel = mWidget->GetDefaultScale();
} else {
devPixelsPerCSSPixel = 1.0;
}
}
mAppUnitsPerDevNotScaledPixel =
PR_MAX(1, NS_lround(AppUnitsPerCSSPixel() / devPixelsPerCSSPixel));
}
NS_ASSERTION(dpi != -1.0, "no dpi set");
mAppUnitsPerPhysicalInch = NS_lround(dpi * mAppUnitsPerDevNotScaledPixel);
UpdateScaledAppUnits();
return NS_OK;
}