mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-14 02:31:59 +00:00
e5e885ae31
# ignore-this-changeset --HG-- extra : amend_source : 7221c8d15a765df71171099468e7c7faa648f37c extra : histedit_source : a0cce6015636202bff09e35a13f72e03257a7695
264 lines
8.9 KiB
C++
264 lines
8.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* 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 "WindowSurfaceX11Image.h"
|
|
|
|
#include "mozilla/gfx/2D.h"
|
|
#include "mozilla/gfx/Tools.h"
|
|
#include "mozilla/gfx/gfxVars.h"
|
|
#include "gfxPlatform.h"
|
|
#include "gfx2DGlue.h"
|
|
|
|
#include <X11/extensions/shape.h>
|
|
|
|
namespace mozilla {
|
|
namespace widget {
|
|
|
|
using namespace mozilla::gfx;
|
|
|
|
// gfxImageSurface pixel format configuration.
|
|
#define SHAPED_IMAGE_SURFACE_BPP 4
|
|
#ifdef IS_BIG_ENDIAN
|
|
# define SHAPED_IMAGE_SURFACE_ALPHA_INDEX 0
|
|
#else
|
|
# define SHAPED_IMAGE_SURFACE_ALPHA_INDEX 3
|
|
#endif
|
|
|
|
WindowSurfaceX11Image::WindowSurfaceX11Image(Display* aDisplay, Window aWindow,
|
|
Visual* aVisual,
|
|
unsigned int aDepth,
|
|
bool aIsShaped)
|
|
: WindowSurfaceX11(aDisplay, aWindow, aVisual, aDepth),
|
|
mTransparencyBitmap(nullptr),
|
|
mTransparencyBitmapWidth(0),
|
|
mTransparencyBitmapHeight(0),
|
|
mIsShaped(aIsShaped) {}
|
|
|
|
WindowSurfaceX11Image::~WindowSurfaceX11Image() {
|
|
if (mTransparencyBitmap) {
|
|
delete[] mTransparencyBitmap;
|
|
|
|
Display* xDisplay = mWindowSurface->XDisplay();
|
|
Window xDrawable = mWindowSurface->XDrawable();
|
|
|
|
XShapeCombineMask(xDisplay, xDrawable, ShapeBounding, 0, 0, X11None,
|
|
ShapeSet);
|
|
}
|
|
}
|
|
|
|
already_AddRefed<gfx::DrawTarget> WindowSurfaceX11Image::Lock(
|
|
const LayoutDeviceIntRegion& aRegion) {
|
|
gfx::IntRect bounds = aRegion.GetBounds().ToUnknownRect();
|
|
gfx::IntSize size(bounds.XMost(), bounds.YMost());
|
|
|
|
if (!mWindowSurface || mWindowSurface->CairoStatus() ||
|
|
!(size <= mWindowSurface->GetSize())) {
|
|
mWindowSurface = new gfxXlibSurface(mDisplay, mWindow, mVisual, size);
|
|
}
|
|
if (mWindowSurface->CairoStatus()) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (!mImageSurface || mImageSurface->CairoStatus() ||
|
|
!(size <= mImageSurface->GetSize())) {
|
|
gfxImageFormat format = SurfaceFormatToImageFormat(mFormat);
|
|
if (format == gfx::SurfaceFormat::UNKNOWN) {
|
|
format = mDepth == 32 ? gfx::SurfaceFormat::A8R8G8B8_UINT32
|
|
: gfx::SurfaceFormat::X8R8G8B8_UINT32;
|
|
}
|
|
|
|
// Use alpha image format for shaped window as we derive
|
|
// the shape bitmap from alpha channel. Must match SHAPED_IMAGE_SURFACE_BPP
|
|
// and SHAPED_IMAGE_SURFACE_ALPHA_INDEX.
|
|
if (mIsShaped) {
|
|
format = gfx::SurfaceFormat::A8R8G8B8_UINT32;
|
|
}
|
|
|
|
mImageSurface = new gfxImageSurface(size, format);
|
|
if (mImageSurface->CairoStatus()) {
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
gfxImageFormat format = mImageSurface->Format();
|
|
// Cairo prefers compositing to BGRX instead of BGRA where possible.
|
|
// Cairo/pixman lacks some fast paths for compositing BGRX onto BGRA, so
|
|
// just report it as BGRX directly in that case.
|
|
// Otherwise, for Skia, report it as BGRA to the compositor. The alpha
|
|
// channel will be discarded when we put the image.
|
|
if (format == gfx::SurfaceFormat::X8R8G8B8_UINT32) {
|
|
gfx::BackendType backend = gfxVars::ContentBackend();
|
|
if (!gfx::Factory::DoesBackendSupportDataDrawtarget(backend)) {
|
|
#ifdef USE_SKIA
|
|
backend = gfx::BackendType::SKIA;
|
|
#else
|
|
backend = gfx::BackendType::CAIRO;
|
|
#endif
|
|
}
|
|
if (backend != gfx::BackendType::CAIRO) {
|
|
format = gfx::SurfaceFormat::A8R8G8B8_UINT32;
|
|
}
|
|
}
|
|
|
|
return gfxPlatform::CreateDrawTargetForData(
|
|
mImageSurface->Data(), mImageSurface->GetSize(), mImageSurface->Stride(),
|
|
ImageFormatToSurfaceFormat(format));
|
|
}
|
|
|
|
// The transparency bitmap routines are derived form the ones at nsWindow.cpp.
|
|
// The difference here is that we compose to RGBA image and then create
|
|
// the shape mask from final image alpha channel.
|
|
static inline int32_t GetBitmapStride(int32_t width) { return (width + 7) / 8; }
|
|
|
|
static bool ChangedMaskBits(gchar* aMaskBits, int32_t aMaskWidth,
|
|
int32_t aMaskHeight, const nsIntRect& aRect,
|
|
uint8_t* aImageData) {
|
|
int32_t stride = aMaskWidth * SHAPED_IMAGE_SURFACE_BPP;
|
|
int32_t x, y, xMax = aRect.XMost(), yMax = aRect.YMost();
|
|
int32_t maskBytesPerRow = GetBitmapStride(aMaskWidth);
|
|
for (y = aRect.y; y < yMax; y++) {
|
|
gchar* maskBytes = aMaskBits + y * maskBytesPerRow;
|
|
uint8_t* alphas = aImageData;
|
|
for (x = aRect.x; x < xMax; x++) {
|
|
bool newBit = *(alphas + SHAPED_IMAGE_SURFACE_ALPHA_INDEX) > 0x7f;
|
|
alphas += SHAPED_IMAGE_SURFACE_BPP;
|
|
|
|
gchar maskByte = maskBytes[x >> 3];
|
|
bool maskBit = (maskByte & (1 << (x & 7))) != 0;
|
|
|
|
if (maskBit != newBit) {
|
|
return true;
|
|
}
|
|
}
|
|
aImageData += stride;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void UpdateMaskBits(gchar* aMaskBits, int32_t aMaskWidth,
|
|
int32_t aMaskHeight, const nsIntRect& aRect,
|
|
uint8_t* aImageData) {
|
|
int32_t stride = aMaskWidth * SHAPED_IMAGE_SURFACE_BPP;
|
|
int32_t x, y, xMax = aRect.XMost(), yMax = aRect.YMost();
|
|
int32_t maskBytesPerRow = GetBitmapStride(aMaskWidth);
|
|
for (y = aRect.y; y < yMax; y++) {
|
|
gchar* maskBytes = aMaskBits + y * maskBytesPerRow;
|
|
uint8_t* alphas = aImageData;
|
|
for (x = aRect.x; x < xMax; x++) {
|
|
bool newBit = *(alphas + SHAPED_IMAGE_SURFACE_ALPHA_INDEX) > 0x7f;
|
|
alphas += SHAPED_IMAGE_SURFACE_BPP;
|
|
|
|
gchar mask = 1 << (x & 7);
|
|
gchar maskByte = maskBytes[x >> 3];
|
|
// Note: '-newBit' turns 0 into 00...00 and 1 into 11...11
|
|
maskBytes[x >> 3] = (maskByte & ~mask) | (-newBit & mask);
|
|
}
|
|
aImageData += stride;
|
|
}
|
|
}
|
|
|
|
void WindowSurfaceX11Image::ResizeTransparencyBitmap(int aWidth, int aHeight) {
|
|
int32_t actualSize =
|
|
GetBitmapStride(mTransparencyBitmapWidth) * mTransparencyBitmapHeight;
|
|
int32_t newSize = GetBitmapStride(aWidth) * aHeight;
|
|
|
|
if (actualSize < newSize) {
|
|
delete[] mTransparencyBitmap;
|
|
mTransparencyBitmap = new gchar[newSize];
|
|
}
|
|
|
|
mTransparencyBitmapWidth = aWidth;
|
|
mTransparencyBitmapHeight = aHeight;
|
|
}
|
|
|
|
void WindowSurfaceX11Image::ApplyTransparencyBitmap() {
|
|
gfx::IntSize size = mWindowSurface->GetSize();
|
|
bool maskChanged = true;
|
|
|
|
if (!mTransparencyBitmap) {
|
|
mTransparencyBitmapWidth = size.width;
|
|
mTransparencyBitmapHeight = size.height;
|
|
|
|
int32_t byteSize =
|
|
GetBitmapStride(mTransparencyBitmapWidth) * mTransparencyBitmapHeight;
|
|
mTransparencyBitmap = new gchar[byteSize];
|
|
} else {
|
|
bool sizeChanged = (size.width != mTransparencyBitmapWidth ||
|
|
size.height != mTransparencyBitmapHeight);
|
|
|
|
if (sizeChanged) {
|
|
ResizeTransparencyBitmap(size.width, size.height);
|
|
} else {
|
|
maskChanged = ChangedMaskBits(
|
|
mTransparencyBitmap, mTransparencyBitmapWidth,
|
|
mTransparencyBitmapHeight, nsIntRect(0, 0, size.width, size.height),
|
|
(uint8_t*)mImageSurface->Data());
|
|
}
|
|
}
|
|
|
|
if (maskChanged) {
|
|
UpdateMaskBits(mTransparencyBitmap, mTransparencyBitmapWidth,
|
|
mTransparencyBitmapHeight,
|
|
nsIntRect(0, 0, size.width, size.height),
|
|
(uint8_t*)mImageSurface->Data());
|
|
|
|
// We use X11 calls where possible, because GDK handles expose events
|
|
// for shaped windows in a way that's incompatible with us (Bug 635903).
|
|
// It doesn't occur when the shapes are set through X.
|
|
Display* xDisplay = mWindowSurface->XDisplay();
|
|
Window xDrawable = mWindowSurface->XDrawable();
|
|
Pixmap maskPixmap = XCreateBitmapFromData(
|
|
xDisplay, xDrawable, mTransparencyBitmap, mTransparencyBitmapWidth,
|
|
mTransparencyBitmapHeight);
|
|
XShapeCombineMask(xDisplay, xDrawable, ShapeBounding, 0, 0, maskPixmap,
|
|
ShapeSet);
|
|
XFreePixmap(xDisplay, maskPixmap);
|
|
}
|
|
}
|
|
|
|
void WindowSurfaceX11Image::Commit(
|
|
const LayoutDeviceIntRegion& aInvalidRegion) {
|
|
RefPtr<gfx::DrawTarget> dt = gfx::Factory::CreateDrawTargetForCairoSurface(
|
|
mWindowSurface->CairoSurface(), mWindowSurface->GetSize());
|
|
RefPtr<gfx::SourceSurface> surf =
|
|
gfx::Factory::CreateSourceSurfaceForCairoSurface(
|
|
mImageSurface->CairoSurface(), mImageSurface->GetSize(),
|
|
mImageSurface->Format());
|
|
if (!dt || !surf) {
|
|
return;
|
|
}
|
|
|
|
gfx::IntRect bounds = aInvalidRegion.GetBounds().ToUnknownRect();
|
|
gfx::Rect rect(bounds);
|
|
if (rect.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
uint32_t numRects = aInvalidRegion.GetNumRects();
|
|
if (numRects != 1) {
|
|
AutoTArray<IntRect, 32> rects;
|
|
rects.SetCapacity(numRects);
|
|
for (auto iter = aInvalidRegion.RectIter(); !iter.Done(); iter.Next()) {
|
|
rects.AppendElement(iter.Get().ToUnknownRect());
|
|
}
|
|
dt->PushDeviceSpaceClipRects(rects.Elements(), rects.Length());
|
|
}
|
|
|
|
if (mIsShaped) {
|
|
ApplyTransparencyBitmap();
|
|
}
|
|
|
|
dt->DrawSurface(surf, rect, rect);
|
|
|
|
if (numRects != 1) {
|
|
dt->PopClip();
|
|
}
|
|
}
|
|
|
|
} // namespace widget
|
|
} // namespace mozilla
|