1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/thebes/gfxImageSurface.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,440 @@
1.4 +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +
1.10 +#include "mozilla/MemoryReporting.h"
1.11 +#if defined(HAVE_POSIX_MEMALIGN)
1.12 +#include "gfxAlphaRecovery.h"
1.13 +#endif
1.14 +#include "gfxImageSurface.h"
1.15 +
1.16 +#include "cairo.h"
1.17 +#include "mozilla/gfx/2D.h"
1.18 +#include "gfx2DGlue.h"
1.19 +#include <algorithm>
1.20 +
1.21 +using namespace mozilla;
1.22 +using namespace mozilla::gfx;
1.23 +
1.24 +gfxImageSurface::gfxImageSurface()
1.25 + : mSize(0, 0),
1.26 + mOwnsData(false),
1.27 + mFormat(gfxImageFormat::Unknown),
1.28 + mStride(0)
1.29 +{
1.30 +}
1.31 +
1.32 +void
1.33 +gfxImageSurface::InitFromSurface(cairo_surface_t *csurf)
1.34 +{
1.35 + mSize.width = cairo_image_surface_get_width(csurf);
1.36 + mSize.height = cairo_image_surface_get_height(csurf);
1.37 + mData = cairo_image_surface_get_data(csurf);
1.38 + mFormat = (gfxImageFormat) cairo_image_surface_get_format(csurf);
1.39 + mOwnsData = false;
1.40 + mStride = cairo_image_surface_get_stride(csurf);
1.41 +
1.42 + Init(csurf, true);
1.43 +}
1.44 +
1.45 +gfxImageSurface::gfxImageSurface(unsigned char *aData, const gfxIntSize& aSize,
1.46 + long aStride, gfxImageFormat aFormat)
1.47 +{
1.48 + InitWithData(aData, aSize, aStride, aFormat);
1.49 +}
1.50 +
1.51 +void
1.52 +gfxImageSurface::MakeInvalid()
1.53 +{
1.54 + mSize = gfxIntSize(-1, -1);
1.55 + mData = nullptr;
1.56 + mStride = 0;
1.57 +}
1.58 +
1.59 +void
1.60 +gfxImageSurface::InitWithData(unsigned char *aData, const gfxIntSize& aSize,
1.61 + long aStride, gfxImageFormat aFormat)
1.62 +{
1.63 + mSize = aSize;
1.64 + mOwnsData = false;
1.65 + mData = aData;
1.66 + mFormat = aFormat;
1.67 + mStride = aStride;
1.68 +
1.69 + if (!CheckSurfaceSize(aSize))
1.70 + MakeInvalid();
1.71 +
1.72 + cairo_surface_t *surface =
1.73 + cairo_image_surface_create_for_data((unsigned char*)mData,
1.74 + (cairo_format_t)(int)mFormat,
1.75 + mSize.width,
1.76 + mSize.height,
1.77 + mStride);
1.78 +
1.79 + // cairo_image_surface_create_for_data can return a 'null' surface
1.80 + // in out of memory conditions. The gfxASurface::Init call checks
1.81 + // the surface it receives to see if there is an error with the
1.82 + // surface and handles it appropriately. That is why there is
1.83 + // no check here.
1.84 + Init(surface);
1.85 +}
1.86 +
1.87 +static void*
1.88 +TryAllocAlignedBytes(size_t aSize)
1.89 +{
1.90 + // Use fallible allocators here
1.91 +#if defined(HAVE_POSIX_MEMALIGN)
1.92 + void* ptr;
1.93 + // Try to align for fast alpha recovery. This should only help
1.94 + // cairo too, can't hurt.
1.95 + return moz_posix_memalign(&ptr,
1.96 + 1 << gfxAlphaRecovery::GoodAlignmentLog2(),
1.97 + aSize) ?
1.98 + nullptr : ptr;
1.99 +#else
1.100 + // Oh well, hope that luck is with us in the allocator
1.101 + return moz_malloc(aSize);
1.102 +#endif
1.103 +}
1.104 +
1.105 +gfxImageSurface::gfxImageSurface(const gfxIntSize& size, gfxImageFormat format, bool aClear)
1.106 + : mSize(size), mData(nullptr), mFormat(format)
1.107 +{
1.108 + AllocateAndInit(0, 0, aClear);
1.109 +}
1.110 +
1.111 +void
1.112 +gfxImageSurface::AllocateAndInit(long aStride, int32_t aMinimalAllocation,
1.113 + bool aClear)
1.114 +{
1.115 + // The callers should set mSize and mFormat.
1.116 + MOZ_ASSERT(!mData);
1.117 + mData = nullptr;
1.118 + mOwnsData = false;
1.119 +
1.120 + mStride = aStride > 0 ? aStride : ComputeStride();
1.121 + if (aMinimalAllocation < mSize.height * mStride)
1.122 + aMinimalAllocation = mSize.height * mStride;
1.123 +
1.124 + if (!CheckSurfaceSize(mSize))
1.125 + MakeInvalid();
1.126 +
1.127 + // if we have a zero-sized surface, just leave mData nullptr
1.128 + if (mSize.height * mStride > 0) {
1.129 +
1.130 + // This can fail to allocate memory aligned as we requested,
1.131 + // or it can fail to allocate any memory at all.
1.132 + mData = (unsigned char *) TryAllocAlignedBytes(aMinimalAllocation);
1.133 + if (!mData)
1.134 + return;
1.135 + if (aClear)
1.136 + memset(mData, 0, aMinimalAllocation);
1.137 + }
1.138 +
1.139 + mOwnsData = true;
1.140 +
1.141 + cairo_surface_t *surface =
1.142 + cairo_image_surface_create_for_data((unsigned char*)mData,
1.143 + (cairo_format_t)(int)mFormat,
1.144 + mSize.width,
1.145 + mSize.height,
1.146 + mStride);
1.147 +
1.148 + Init(surface);
1.149 +
1.150 + if (mSurfaceValid) {
1.151 + RecordMemoryUsed(mSize.height * ComputeStride() +
1.152 + sizeof(gfxImageSurface));
1.153 + }
1.154 +}
1.155 +
1.156 +gfxImageSurface::gfxImageSurface(const gfxIntSize& size, gfxImageFormat format,
1.157 + long aStride, int32_t aExtraBytes, bool aClear)
1.158 + : mSize(size), mData(nullptr), mFormat(format)
1.159 +{
1.160 + AllocateAndInit(aStride, aExtraBytes, aClear);
1.161 +}
1.162 +
1.163 +gfxImageSurface::gfxImageSurface(cairo_surface_t *csurf)
1.164 +{
1.165 + mSize.width = cairo_image_surface_get_width(csurf);
1.166 + mSize.height = cairo_image_surface_get_height(csurf);
1.167 + mData = cairo_image_surface_get_data(csurf);
1.168 + mFormat = (gfxImageFormat) cairo_image_surface_get_format(csurf);
1.169 + mOwnsData = false;
1.170 + mStride = cairo_image_surface_get_stride(csurf);
1.171 +
1.172 + Init(csurf, true);
1.173 +}
1.174 +
1.175 +gfxImageSurface::~gfxImageSurface()
1.176 +{
1.177 + if (mOwnsData)
1.178 + free(mData);
1.179 +}
1.180 +
1.181 +/*static*/ long
1.182 +gfxImageSurface::ComputeStride(const gfxIntSize& aSize, gfxImageFormat aFormat)
1.183 +{
1.184 + long stride;
1.185 +
1.186 + if (aFormat == gfxImageFormat::ARGB32)
1.187 + stride = aSize.width * 4;
1.188 + else if (aFormat == gfxImageFormat::RGB24)
1.189 + stride = aSize.width * 4;
1.190 + else if (aFormat == gfxImageFormat::RGB16_565)
1.191 + stride = aSize.width * 2;
1.192 + else if (aFormat == gfxImageFormat::A8)
1.193 + stride = aSize.width;
1.194 + else if (aFormat == gfxImageFormat::A1) {
1.195 + stride = (aSize.width + 7) / 8;
1.196 + } else {
1.197 + NS_WARNING("Unknown format specified to gfxImageSurface!");
1.198 + stride = aSize.width * 4;
1.199 + }
1.200 +
1.201 + stride = ((stride + 3) / 4) * 4;
1.202 +
1.203 + return stride;
1.204 +}
1.205 +
1.206 +size_t
1.207 +gfxImageSurface::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
1.208 +{
1.209 + size_t n = gfxASurface::SizeOfExcludingThis(aMallocSizeOf);
1.210 + if (mOwnsData) {
1.211 + n += aMallocSizeOf(mData);
1.212 + }
1.213 + return n;
1.214 +}
1.215 +
1.216 +size_t
1.217 +gfxImageSurface::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
1.218 +{
1.219 + return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
1.220 +}
1.221 +
1.222 +bool
1.223 +gfxImageSurface::SizeOfIsMeasured() const
1.224 +{
1.225 + return true;
1.226 +}
1.227 +
1.228 +// helper function for the CopyFrom methods
1.229 +static void
1.230 +CopyForStride(unsigned char* aDest, unsigned char* aSrc, const gfxIntSize& aSize, long aDestStride, long aSrcStride)
1.231 +{
1.232 + if (aDestStride == aSrcStride) {
1.233 + memcpy (aDest, aSrc, aSrcStride * aSize.height);
1.234 + } else {
1.235 + int lineSize = std::min(aDestStride, aSrcStride);
1.236 + for (int i = 0; i < aSize.height; i++) {
1.237 + unsigned char* src = aSrc + aSrcStride * i;
1.238 + unsigned char* dst = aDest + aDestStride * i;
1.239 +
1.240 + memcpy (dst, src, lineSize);
1.241 + }
1.242 + }
1.243 +}
1.244 +
1.245 +// helper function for the CopyFrom methods
1.246 +static bool
1.247 +FormatsAreCompatible(gfxImageFormat a1, gfxImageFormat a2)
1.248 +{
1.249 + if (a1 != a2 &&
1.250 + !(a1 == gfxImageFormat::ARGB32 &&
1.251 + a2 == gfxImageFormat::RGB24) &&
1.252 + !(a1 == gfxImageFormat::RGB24 &&
1.253 + a2 == gfxImageFormat::ARGB32)) {
1.254 + return false;
1.255 + }
1.256 +
1.257 + return true;
1.258 +}
1.259 +
1.260 +bool
1.261 +gfxImageSurface::CopyFrom (SourceSurface *aSurface)
1.262 +{
1.263 + mozilla::RefPtr<DataSourceSurface> data = aSurface->GetDataSurface();
1.264 +
1.265 + if (!data) {
1.266 + return false;
1.267 + }
1.268 +
1.269 + gfxIntSize size(data->GetSize().width, data->GetSize().height);
1.270 + if (size != mSize) {
1.271 + return false;
1.272 + }
1.273 +
1.274 + if (!FormatsAreCompatible(SurfaceFormatToImageFormat(aSurface->GetFormat()),
1.275 + mFormat)) {
1.276 + return false;
1.277 + }
1.278 +
1.279 + CopyForStride(mData, data->GetData(), size, mStride, data->Stride());
1.280 +
1.281 + return true;
1.282 +}
1.283 +
1.284 +
1.285 +bool
1.286 +gfxImageSurface::CopyFrom(gfxImageSurface *other)
1.287 +{
1.288 + if (other->mSize != mSize) {
1.289 + return false;
1.290 + }
1.291 +
1.292 + if (!FormatsAreCompatible(other->mFormat, mFormat)) {
1.293 + return false;
1.294 + }
1.295 +
1.296 + CopyForStride(mData, other->mData, mSize, mStride, other->mStride);
1.297 +
1.298 + return true;
1.299 +}
1.300 +
1.301 +bool
1.302 +gfxImageSurface::CopyTo(SourceSurface *aSurface) {
1.303 + mozilla::RefPtr<DataSourceSurface> data = aSurface->GetDataSurface();
1.304 +
1.305 + if (!data) {
1.306 + return false;
1.307 + }
1.308 +
1.309 + gfxIntSize size(data->GetSize().width, data->GetSize().height);
1.310 + if (size != mSize) {
1.311 + return false;
1.312 + }
1.313 +
1.314 + if (!FormatsAreCompatible(SurfaceFormatToImageFormat(aSurface->GetFormat()),
1.315 + mFormat)) {
1.316 + return false;
1.317 + }
1.318 +
1.319 + CopyForStride(data->GetData(), mData, size, data->Stride(), mStride);
1.320 +
1.321 + return true;
1.322 +}
1.323 +
1.324 +TemporaryRef<DataSourceSurface>
1.325 +gfxImageSurface::CopyToB8G8R8A8DataSourceSurface()
1.326 +{
1.327 + RefPtr<DataSourceSurface> dataSurface =
1.328 + Factory::CreateDataSourceSurface(IntSize(GetSize().width, GetSize().height),
1.329 + SurfaceFormat::B8G8R8A8);
1.330 + if (dataSurface) {
1.331 + CopyTo(dataSurface);
1.332 + }
1.333 + return dataSurface.forget();
1.334 +}
1.335 +
1.336 +already_AddRefed<gfxSubimageSurface>
1.337 +gfxImageSurface::GetSubimage(const gfxRect& aRect)
1.338 +{
1.339 + gfxRect r(aRect);
1.340 + r.Round();
1.341 + MOZ_ASSERT(gfxRect(0, 0, mSize.width, mSize.height).Contains(r));
1.342 +
1.343 + gfxImageFormat format = Format();
1.344 +
1.345 + unsigned char* subData = Data() +
1.346 + (Stride() * (int)r.Y()) +
1.347 + (int)r.X() * gfxASurface::BytePerPixelFromFormat(Format());
1.348 +
1.349 + if (format == gfxImageFormat::ARGB32 &&
1.350 + GetOpaqueRect().Contains(aRect)) {
1.351 + format = gfxImageFormat::RGB24;
1.352 + }
1.353 +
1.354 + nsRefPtr<gfxSubimageSurface> image =
1.355 + new gfxSubimageSurface(this, subData,
1.356 + gfxIntSize((int)r.Width(), (int)r.Height()),
1.357 + format);
1.358 +
1.359 + return image.forget();
1.360 +}
1.361 +
1.362 +gfxSubimageSurface::gfxSubimageSurface(gfxImageSurface* aParent,
1.363 + unsigned char* aData,
1.364 + const gfxIntSize& aSize,
1.365 + gfxImageFormat aFormat)
1.366 + : gfxImageSurface(aData, aSize, aParent->Stride(), aFormat)
1.367 + , mParent(aParent)
1.368 +{
1.369 +}
1.370 +
1.371 +already_AddRefed<gfxImageSurface>
1.372 +gfxImageSurface::GetAsImageSurface()
1.373 +{
1.374 + nsRefPtr<gfxImageSurface> surface = this;
1.375 + return surface.forget();
1.376 +}
1.377 +
1.378 +void
1.379 +gfxImageSurface::MovePixels(const nsIntRect& aSourceRect,
1.380 + const nsIntPoint& aDestTopLeft)
1.381 +{
1.382 + const nsIntRect bounds(0, 0, mSize.width, mSize.height);
1.383 + nsIntPoint offset = aDestTopLeft - aSourceRect.TopLeft();
1.384 + nsIntRect clippedSource = aSourceRect;
1.385 + clippedSource.IntersectRect(clippedSource, bounds);
1.386 + nsIntRect clippedDest = clippedSource + offset;
1.387 + clippedDest.IntersectRect(clippedDest, bounds);
1.388 + const nsIntRect dest = clippedDest;
1.389 + const nsIntRect source = dest - offset;
1.390 + // NB: this relies on IntersectRect() and operator+/- preserving
1.391 + // x/y for empty rectangles
1.392 + NS_ABORT_IF_FALSE(bounds.Contains(dest) && bounds.Contains(source) &&
1.393 + aSourceRect.Contains(source) &&
1.394 + nsIntRect(aDestTopLeft, aSourceRect.Size()).Contains(dest) &&
1.395 + source.Size() == dest.Size() &&
1.396 + offset == (dest.TopLeft() - source.TopLeft()),
1.397 + "Messed up clipping, crash or corruption will follow");
1.398 + if (source.IsEmpty() || source.IsEqualInterior(dest)) {
1.399 + return;
1.400 + }
1.401 +
1.402 + long naturalStride = ComputeStride(mSize, mFormat);
1.403 + if (mStride == naturalStride && dest.width == bounds.width) {
1.404 + // Fast path: this is a vertical shift of some rows in a
1.405 + // "normal" image surface. We can directly memmove and
1.406 + // hopefully stay in SIMD land.
1.407 + unsigned char* dst = mData + dest.y * mStride;
1.408 + const unsigned char* src = mData + source.y * mStride;
1.409 + size_t nBytes = dest.height * mStride;
1.410 + memmove(dst, src, nBytes);
1.411 + return;
1.412 + }
1.413 +
1.414 + // Slow(er) path: have to move row-by-row.
1.415 + const int32_t bpp = BytePerPixelFromFormat(mFormat);
1.416 + const size_t nRowBytes = dest.width * bpp;
1.417 + // dstRow points at the first pixel within the current destination
1.418 + // row, and similarly for srcRow. endSrcRow is one row beyond the
1.419 + // last row we need to copy. stride is either +mStride or
1.420 + // -mStride, depending on which direction we're copying.
1.421 + unsigned char* dstRow;
1.422 + unsigned char* srcRow;
1.423 + unsigned char* endSrcRow; // NB: this may point outside the image
1.424 + long stride;
1.425 + if (dest.y > source.y) {
1.426 + // We're copying down from source to dest, so walk backwards
1.427 + // starting from the last rows to avoid stomping pixels we
1.428 + // need.
1.429 + stride = -mStride;
1.430 + dstRow = mData + dest.x * bpp + (dest.YMost() - 1) * mStride;
1.431 + srcRow = mData + source.x * bpp + (source.YMost() - 1) * mStride;
1.432 + endSrcRow = mData + source.x * bpp + (source.y - 1) * mStride;
1.433 + } else {
1.434 + stride = mStride;
1.435 + dstRow = mData + dest.x * bpp + dest.y * mStride;
1.436 + srcRow = mData + source.x * bpp + source.y * mStride;
1.437 + endSrcRow = mData + source.x * bpp + source.YMost() * mStride;
1.438 + }
1.439 +
1.440 + for (; srcRow != endSrcRow; dstRow += stride, srcRow += stride) {
1.441 + memmove(dstRow, srcRow, nRowBytes);
1.442 + }
1.443 +}
