mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
870 lines
31 KiB
C++
870 lines
31 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "gfxUtils.h"
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#include "gfxContext.h"
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#include "gfxPlatform.h"
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#include "gfxDrawable.h"
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#include "nsRegion.h"
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#include "yuv_convert.h"
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#include "ycbcr_to_rgb565.h"
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#include "GeckoProfiler.h"
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#include "ImageContainer.h"
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#include "gfx2DGlue.h"
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#ifdef XP_WIN
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#include "gfxWindowsPlatform.h"
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#endif
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using namespace mozilla;
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using namespace mozilla::layers;
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using namespace mozilla::gfx;
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#include "PremultiplyTables.h"
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static const uint8_t PremultiplyValue(uint8_t a, uint8_t v) {
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return gfxUtils::sPremultiplyTable[a*256+v];
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}
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static const uint8_t UnpremultiplyValue(uint8_t a, uint8_t v) {
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return gfxUtils::sUnpremultiplyTable[a*256+v];
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}
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void
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gfxUtils::PremultiplyImageSurface(gfxImageSurface *aSourceSurface,
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gfxImageSurface *aDestSurface)
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{
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if (!aDestSurface)
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aDestSurface = aSourceSurface;
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MOZ_ASSERT(aSourceSurface->Format() == aDestSurface->Format() &&
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aSourceSurface->Width() == aDestSurface->Width() &&
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aSourceSurface->Height() == aDestSurface->Height() &&
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aSourceSurface->Stride() == aDestSurface->Stride(),
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"Source and destination surfaces don't have identical characteristics");
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MOZ_ASSERT(aSourceSurface->Stride() == aSourceSurface->Width() * 4,
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"Source surface stride isn't tightly packed");
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// Only premultiply ARGB32
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if (aSourceSurface->Format() != gfxImageFormatARGB32) {
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if (aDestSurface != aSourceSurface) {
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memcpy(aDestSurface->Data(), aSourceSurface->Data(),
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aSourceSurface->Stride() * aSourceSurface->Height());
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}
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return;
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}
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uint8_t *src = aSourceSurface->Data();
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uint8_t *dst = aDestSurface->Data();
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uint32_t dim = aSourceSurface->Width() * aSourceSurface->Height();
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for (uint32_t i = 0; i < dim; ++i) {
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#ifdef IS_LITTLE_ENDIAN
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uint8_t b = *src++;
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uint8_t g = *src++;
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uint8_t r = *src++;
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uint8_t a = *src++;
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*dst++ = PremultiplyValue(a, b);
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*dst++ = PremultiplyValue(a, g);
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*dst++ = PremultiplyValue(a, r);
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*dst++ = a;
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#else
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uint8_t a = *src++;
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uint8_t r = *src++;
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uint8_t g = *src++;
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uint8_t b = *src++;
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*dst++ = a;
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*dst++ = PremultiplyValue(a, r);
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*dst++ = PremultiplyValue(a, g);
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*dst++ = PremultiplyValue(a, b);
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#endif
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}
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}
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void
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gfxUtils::UnpremultiplyImageSurface(gfxImageSurface *aSourceSurface,
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gfxImageSurface *aDestSurface)
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{
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if (!aDestSurface)
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aDestSurface = aSourceSurface;
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MOZ_ASSERT(aSourceSurface->Format() == aDestSurface->Format() &&
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aSourceSurface->Width() == aDestSurface->Width() &&
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aSourceSurface->Height() == aDestSurface->Height() &&
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aSourceSurface->Stride() == aDestSurface->Stride(),
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"Source and destination surfaces don't have identical characteristics");
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MOZ_ASSERT(aSourceSurface->Stride() == aSourceSurface->Width() * 4,
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"Source surface stride isn't tightly packed");
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// Only premultiply ARGB32
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if (aSourceSurface->Format() != gfxImageFormatARGB32) {
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if (aDestSurface != aSourceSurface) {
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memcpy(aDestSurface->Data(), aSourceSurface->Data(),
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aSourceSurface->Stride() * aSourceSurface->Height());
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}
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return;
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}
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uint8_t *src = aSourceSurface->Data();
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uint8_t *dst = aDestSurface->Data();
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uint32_t dim = aSourceSurface->Width() * aSourceSurface->Height();
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for (uint32_t i = 0; i < dim; ++i) {
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#ifdef IS_LITTLE_ENDIAN
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uint8_t b = *src++;
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uint8_t g = *src++;
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uint8_t r = *src++;
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uint8_t a = *src++;
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*dst++ = UnpremultiplyValue(a, b);
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*dst++ = UnpremultiplyValue(a, g);
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*dst++ = UnpremultiplyValue(a, r);
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*dst++ = a;
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#else
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uint8_t a = *src++;
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uint8_t r = *src++;
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uint8_t g = *src++;
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uint8_t b = *src++;
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*dst++ = a;
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*dst++ = UnpremultiplyValue(a, r);
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*dst++ = UnpremultiplyValue(a, g);
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*dst++ = UnpremultiplyValue(a, b);
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#endif
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}
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}
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void
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gfxUtils::ConvertBGRAtoRGBA(gfxImageSurface *aSourceSurface,
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gfxImageSurface *aDestSurface) {
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if (!aDestSurface)
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aDestSurface = aSourceSurface;
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MOZ_ASSERT(aSourceSurface->Format() == aDestSurface->Format() &&
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aSourceSurface->Width() == aDestSurface->Width() &&
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aSourceSurface->Height() == aDestSurface->Height() &&
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aSourceSurface->Stride() == aDestSurface->Stride(),
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"Source and destination surfaces don't have identical characteristics");
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MOZ_ASSERT(aSourceSurface->Stride() == aSourceSurface->Width() * 4,
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"Source surface stride isn't tightly packed");
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MOZ_ASSERT(aSourceSurface->Format() == gfxImageFormatARGB32 || aSourceSurface->Format() == gfxImageFormatRGB24,
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"Surfaces must be ARGB32 or RGB24");
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uint8_t *src = aSourceSurface->Data();
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uint8_t *dst = aDestSurface->Data();
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uint32_t dim = aSourceSurface->Width() * aSourceSurface->Height();
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uint8_t *srcEnd = src + 4*dim;
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if (src == dst) {
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uint8_t buffer[4];
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for (; src != srcEnd; src += 4) {
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buffer[0] = src[2];
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buffer[1] = src[1];
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buffer[2] = src[0];
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src[0] = buffer[0];
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src[1] = buffer[1];
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src[2] = buffer[2];
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}
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} else {
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for (; src != srcEnd; src += 4, dst += 4) {
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dst[0] = src[2];
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dst[1] = src[1];
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dst[2] = src[0];
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dst[3] = src[3];
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}
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}
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}
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static bool
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IsSafeImageTransformComponent(gfxFloat aValue)
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{
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return aValue >= -32768 && aValue <= 32767;
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}
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#ifndef MOZ_GFX_OPTIMIZE_MOBILE
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/**
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* This returns the fastest operator to use for solid surfaces which have no
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* alpha channel or their alpha channel is uniformly opaque.
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* This differs per render mode.
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*/
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static gfxContext::GraphicsOperator
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OptimalFillOperator()
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{
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#ifdef XP_WIN
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if (gfxWindowsPlatform::GetPlatform()->GetRenderMode() ==
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gfxWindowsPlatform::RENDER_DIRECT2D) {
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// D2D -really- hates operator source.
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return gfxContext::OPERATOR_OVER;
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} else {
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#endif
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return gfxContext::OPERATOR_SOURCE;
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#ifdef XP_WIN
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}
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#endif
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}
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// EXTEND_PAD won't help us here; we have to create a temporary surface to hold
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// the subimage of pixels we're allowed to sample.
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static already_AddRefed<gfxDrawable>
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CreateSamplingRestrictedDrawable(gfxDrawable* aDrawable,
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gfxContext* aContext,
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const gfxMatrix& aUserSpaceToImageSpace,
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const gfxRect& aSourceRect,
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const gfxRect& aSubimage,
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const gfxImageFormat aFormat)
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{
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PROFILER_LABEL("gfxUtils", "CreateSamplingRestricedDrawable");
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gfxRect userSpaceClipExtents = aContext->GetClipExtents();
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// This isn't optimal --- if aContext has a rotation then GetClipExtents
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// will have to do a bounding-box computation, and TransformBounds might
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// too, so we could get a better result if we computed image space clip
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// extents in one go --- but it doesn't really matter and this is easier
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// to understand.
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gfxRect imageSpaceClipExtents =
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aUserSpaceToImageSpace.TransformBounds(userSpaceClipExtents);
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// Inflate by one pixel because bilinear filtering will sample at most
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// one pixel beyond the computed image pixel coordinate.
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imageSpaceClipExtents.Inflate(1.0);
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gfxRect needed = imageSpaceClipExtents.Intersect(aSourceRect);
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needed = needed.Intersect(aSubimage);
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needed.RoundOut();
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// if 'needed' is empty, nothing will be drawn since aFill
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// must be entirely outside the clip region, so it doesn't
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// matter what we do here, but we should avoid trying to
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// create a zero-size surface.
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if (needed.IsEmpty())
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return nullptr;
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nsRefPtr<gfxDrawable> drawable;
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gfxIntSize size(int32_t(needed.Width()), int32_t(needed.Height()));
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nsRefPtr<gfxImageSurface> image = aDrawable->GetAsImageSurface();
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if (image && gfxRect(0, 0, image->GetSize().width, image->GetSize().height).Contains(needed)) {
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nsRefPtr<gfxASurface> temp = image->GetSubimage(needed);
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drawable = new gfxSurfaceDrawable(temp, size, gfxMatrix().Translate(-needed.TopLeft()));
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} else {
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mozilla::RefPtr<mozilla::gfx::DrawTarget> target =
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gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(ToIntSize(size),
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ImageFormatToSurfaceFormat(aFormat));
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if (!target) {
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return nullptr;
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}
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nsRefPtr<gfxContext> tmpCtx = new gfxContext(target);
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tmpCtx->SetOperator(OptimalFillOperator());
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aDrawable->Draw(tmpCtx, needed - needed.TopLeft(), true,
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GraphicsFilter::FILTER_FAST, gfxMatrix().Translate(needed.TopLeft()));
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drawable = new gfxSurfaceDrawable(target, size, gfxMatrix().Translate(-needed.TopLeft()));
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}
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return drawable.forget();
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}
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#endif // !MOZ_GFX_OPTIMIZE_MOBILE
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// working around cairo/pixman bug (bug 364968)
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// Our device-space-to-image-space transform may not be acceptable to pixman.
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struct MOZ_STACK_CLASS AutoCairoPixmanBugWorkaround
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{
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AutoCairoPixmanBugWorkaround(gfxContext* aContext,
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const gfxMatrix& aDeviceSpaceToImageSpace,
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const gfxRect& aFill,
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const gfxASurface* aSurface)
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: mContext(aContext), mSucceeded(true), mPushedGroup(false)
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{
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// Quartz's limits for matrix are much larger than pixman
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if (!aSurface || aSurface->GetType() == gfxSurfaceTypeQuartz)
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return;
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if (!IsSafeImageTransformComponent(aDeviceSpaceToImageSpace.xx) ||
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!IsSafeImageTransformComponent(aDeviceSpaceToImageSpace.xy) ||
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!IsSafeImageTransformComponent(aDeviceSpaceToImageSpace.yx) ||
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!IsSafeImageTransformComponent(aDeviceSpaceToImageSpace.yy)) {
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NS_WARNING("Scaling up too much, bailing out");
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mSucceeded = false;
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return;
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}
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if (IsSafeImageTransformComponent(aDeviceSpaceToImageSpace.x0) &&
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IsSafeImageTransformComponent(aDeviceSpaceToImageSpace.y0))
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return;
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// We'll push a group, which will hopefully reduce our transform's
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// translation so it's in bounds.
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gfxMatrix currentMatrix = mContext->CurrentMatrix();
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mContext->Save();
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// Clip the rounded-out-to-device-pixels bounds of the
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// transformed fill area. This is the area for the group we
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// want to push.
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mContext->IdentityMatrix();
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gfxRect bounds = currentMatrix.TransformBounds(aFill);
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bounds.RoundOut();
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mContext->Clip(bounds);
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mContext->SetMatrix(currentMatrix);
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mContext->PushGroup(GFX_CONTENT_COLOR_ALPHA);
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mContext->SetOperator(gfxContext::OPERATOR_OVER);
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mPushedGroup = true;
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}
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~AutoCairoPixmanBugWorkaround()
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{
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if (mPushedGroup) {
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mContext->PopGroupToSource();
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mContext->Paint();
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mContext->Restore();
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}
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}
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bool PushedGroup() { return mPushedGroup; }
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bool Succeeded() { return mSucceeded; }
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private:
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gfxContext* mContext;
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bool mSucceeded;
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bool mPushedGroup;
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};
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static gfxMatrix
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DeviceToImageTransform(gfxContext* aContext,
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const gfxMatrix& aUserSpaceToImageSpace)
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{
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gfxFloat deviceX, deviceY;
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nsRefPtr<gfxASurface> currentTarget =
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aContext->CurrentSurface(&deviceX, &deviceY);
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gfxMatrix currentMatrix = aContext->CurrentMatrix();
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gfxMatrix deviceToUser = gfxMatrix(currentMatrix).Invert();
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deviceToUser.Translate(-gfxPoint(-deviceX, -deviceY));
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return gfxMatrix(deviceToUser).Multiply(aUserSpaceToImageSpace);
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}
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/* These heuristics are based on Source/WebCore/platform/graphics/skia/ImageSkia.cpp:computeResamplingMode() */
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#ifdef MOZ_GFX_OPTIMIZE_MOBILE
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static GraphicsFilter ReduceResamplingFilter(GraphicsFilter aFilter,
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int aImgWidth, int aImgHeight,
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float aSourceWidth, float aSourceHeight)
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{
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// Images smaller than this in either direction are considered "small" and
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// are not resampled ever (see below).
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const int kSmallImageSizeThreshold = 8;
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// The amount an image can be stretched in a single direction before we
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// say that it is being stretched so much that it must be a line or
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// background that doesn't need resampling.
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const float kLargeStretch = 3.0f;
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if (aImgWidth <= kSmallImageSizeThreshold
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|| aImgHeight <= kSmallImageSizeThreshold) {
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// Never resample small images. These are often used for borders and
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// rules (think 1x1 images used to make lines).
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return GraphicsFilter::FILTER_NEAREST;
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}
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if (aImgHeight * kLargeStretch <= aSourceHeight || aImgWidth * kLargeStretch <= aSourceWidth) {
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// Large image tiling detected.
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// Don't resample if it is being tiled a lot in only one direction.
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// This is trying to catch cases where somebody has created a border
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// (which might be large) and then is stretching it to fill some part
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// of the page.
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if (fabs(aSourceWidth - aImgWidth)/aImgWidth < 0.5 || fabs(aSourceHeight - aImgHeight)/aImgHeight < 0.5)
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return GraphicsFilter::FILTER_NEAREST;
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// The image is growing a lot and in more than one direction. Resampling
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// is slow and doesn't give us very much when growing a lot.
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return aFilter;
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}
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/* Some notes on other heuristics:
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The Skia backend also uses nearest for backgrounds that are stretched by
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a large amount. I'm not sure this is common enough for us to worry about
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now. It also uses nearest for backgrounds/avoids high quality for images
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that are very slightly scaled. I'm also not sure that very slightly
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scaled backgrounds are common enough us to worry about.
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We don't currently have much support for doing high quality interpolation.
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The only place this currently happens is on Quartz and we don't have as
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much control over it as would be needed. Webkit avoids using high quality
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resampling during load. It also avoids high quality if the transformation
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is not just a scale and translation
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WebKit bug #40045 added code to avoid resampling different parts
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of an image with different methods by using a resampling hint size.
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It currently looks unused in WebKit but it's something to watch out for.
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*/
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return aFilter;
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}
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#else
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static GraphicsFilter ReduceResamplingFilter(GraphicsFilter aFilter,
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int aImgWidth, int aImgHeight,
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int aSourceWidth, int aSourceHeight)
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{
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// Just pass the filter through unchanged
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return aFilter;
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}
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#endif
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/* static */ void
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gfxUtils::DrawPixelSnapped(gfxContext* aContext,
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gfxDrawable* aDrawable,
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const gfxMatrix& aUserSpaceToImageSpace,
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const gfxRect& aSubimage,
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const gfxRect& aSourceRect,
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const gfxRect& aImageRect,
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const gfxRect& aFill,
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const gfxImageFormat aFormat,
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GraphicsFilter aFilter,
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uint32_t aImageFlags)
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{
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PROFILER_LABEL("gfxUtils", "DrawPixelSnapped");
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bool doTile = !aImageRect.Contains(aSourceRect) &&
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!(aImageFlags & imgIContainer::FLAG_CLAMP);
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nsRefPtr<gfxASurface> currentTarget = aContext->CurrentSurface();
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gfxMatrix deviceSpaceToImageSpace =
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DeviceToImageTransform(aContext, aUserSpaceToImageSpace);
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AutoCairoPixmanBugWorkaround workaround(aContext, deviceSpaceToImageSpace,
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aFill, currentTarget);
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if (!workaround.Succeeded())
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return;
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nsRefPtr<gfxDrawable> drawable = aDrawable;
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aFilter = ReduceResamplingFilter(aFilter, aImageRect.Width(), aImageRect.Height(), aSourceRect.Width(), aSourceRect.Height());
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gfxMatrix userSpaceToImageSpace = aUserSpaceToImageSpace;
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// On Mobile, we don't ever want to do this; it has the potential for
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// allocating very large temporary surfaces, especially since we'll
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// do full-page snapshots often (see bug 749426).
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#ifdef MOZ_GFX_OPTIMIZE_MOBILE
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// If the pattern translation is large we can get into trouble with pixman's
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// 16 bit coordinate limits. For now, we only do this on platforms where
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// we know we have the pixman limits. 16384.0 is a somewhat arbitrary
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// large number to make sure we avoid the expensive fmod when we can, but
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// still maintain a safe margin from the actual limit
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if (doTile && (userSpaceToImageSpace.y0 > 16384.0 || userSpaceToImageSpace.x0 > 16384.0)) {
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userSpaceToImageSpace.x0 = fmod(userSpaceToImageSpace.x0, aImageRect.width);
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userSpaceToImageSpace.y0 = fmod(userSpaceToImageSpace.y0, aImageRect.height);
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}
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#else
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// OK now, the hard part left is to account for the subimage sampling
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// restriction. If all the transforms involved are just integer
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// translations, then we assume no resampling will occur so there's
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// nothing to do.
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// XXX if only we had source-clipping in cairo!
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if (aContext->CurrentMatrix().HasNonIntegerTranslation() ||
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aUserSpaceToImageSpace.HasNonIntegerTranslation()) {
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if (doTile || !aSubimage.Contains(aImageRect)) {
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nsRefPtr<gfxDrawable> restrictedDrawable =
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CreateSamplingRestrictedDrawable(aDrawable, aContext,
|
|
aUserSpaceToImageSpace, aSourceRect,
|
|
aSubimage, aFormat);
|
|
if (restrictedDrawable) {
|
|
drawable.swap(restrictedDrawable);
|
|
}
|
|
}
|
|
// We no longer need to tile: Either we never needed to, or we already
|
|
// filled a surface with the tiled pattern; this surface can now be
|
|
// drawn without tiling.
|
|
doTile = false;
|
|
}
|
|
#endif
|
|
|
|
drawable->Draw(aContext, aFill, doTile, aFilter, userSpaceToImageSpace);
|
|
}
|
|
|
|
/* static */ int
|
|
gfxUtils::ImageFormatToDepth(gfxImageFormat aFormat)
|
|
{
|
|
switch (aFormat) {
|
|
case gfxImageFormatARGB32:
|
|
return 32;
|
|
case gfxImageFormatRGB24:
|
|
return 24;
|
|
case gfxImageFormatRGB16_565:
|
|
return 16;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
PathFromRegionInternal(gfxContext* aContext, const nsIntRegion& aRegion,
|
|
bool aSnap)
|
|
{
|
|
aContext->NewPath();
|
|
nsIntRegionRectIterator iter(aRegion);
|
|
const nsIntRect* r;
|
|
while ((r = iter.Next()) != nullptr) {
|
|
aContext->Rectangle(gfxRect(r->x, r->y, r->width, r->height), aSnap);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ClipToRegionInternal(gfxContext* aContext, const nsIntRegion& aRegion,
|
|
bool aSnap)
|
|
{
|
|
PathFromRegionInternal(aContext, aRegion, aSnap);
|
|
aContext->Clip();
|
|
}
|
|
|
|
static TemporaryRef<Path>
|
|
PathFromRegionInternal(gfx::DrawTarget* aTarget, const nsIntRegion& aRegion,
|
|
bool aSnap)
|
|
{
|
|
Matrix mat = aTarget->GetTransform();
|
|
const gfxFloat epsilon = 0.000001;
|
|
#define WITHIN_E(a,b) (fabs((a)-(b)) < epsilon)
|
|
// We're essentially duplicating the logic in UserToDevicePixelSnapped here.
|
|
bool shouldNotSnap = !aSnap || (WITHIN_E(mat._11,1.0) &&
|
|
WITHIN_E(mat._22,1.0) &&
|
|
WITHIN_E(mat._12,0.0) &&
|
|
WITHIN_E(mat._21,0.0));
|
|
#undef WITHIN_E
|
|
|
|
RefPtr<PathBuilder> pb = aTarget->CreatePathBuilder();
|
|
nsIntRegionRectIterator iter(aRegion);
|
|
|
|
const nsIntRect* r;
|
|
if (shouldNotSnap) {
|
|
while ((r = iter.Next()) != nullptr) {
|
|
pb->MoveTo(Point(r->x, r->y));
|
|
pb->LineTo(Point(r->XMost(), r->y));
|
|
pb->LineTo(Point(r->XMost(), r->YMost()));
|
|
pb->LineTo(Point(r->x, r->YMost()));
|
|
pb->Close();
|
|
}
|
|
} else {
|
|
while ((r = iter.Next()) != nullptr) {
|
|
Rect rect(r->x, r->y, r->width, r->height);
|
|
|
|
rect.Round();
|
|
pb->MoveTo(rect.TopLeft());
|
|
pb->LineTo(rect.TopRight());
|
|
pb->LineTo(rect.BottomRight());
|
|
pb->LineTo(rect.BottomLeft());
|
|
pb->Close();
|
|
}
|
|
}
|
|
RefPtr<Path> path = pb->Finish();
|
|
return path;
|
|
}
|
|
|
|
static void
|
|
ClipToRegionInternal(gfx::DrawTarget* aTarget, const nsIntRegion& aRegion,
|
|
bool aSnap)
|
|
{
|
|
RefPtr<Path> path = PathFromRegionInternal(aTarget, aRegion, aSnap);
|
|
aTarget->PushClip(path);
|
|
}
|
|
|
|
/*static*/ void
|
|
gfxUtils::ClipToRegion(gfxContext* aContext, const nsIntRegion& aRegion)
|
|
{
|
|
ClipToRegionInternal(aContext, aRegion, false);
|
|
}
|
|
|
|
/*static*/ void
|
|
gfxUtils::ClipToRegion(DrawTarget* aTarget, const nsIntRegion& aRegion)
|
|
{
|
|
ClipToRegionInternal(aTarget, aRegion, false);
|
|
}
|
|
|
|
/*static*/ void
|
|
gfxUtils::ClipToRegionSnapped(gfxContext* aContext, const nsIntRegion& aRegion)
|
|
{
|
|
ClipToRegionInternal(aContext, aRegion, true);
|
|
}
|
|
|
|
/*static*/ void
|
|
gfxUtils::ClipToRegionSnapped(DrawTarget* aTarget, const nsIntRegion& aRegion)
|
|
{
|
|
ClipToRegionInternal(aTarget, aRegion, true);
|
|
}
|
|
|
|
/*static*/ gfxFloat
|
|
gfxUtils::ClampToScaleFactor(gfxFloat aVal)
|
|
{
|
|
// Arbitary scale factor limitation. We can increase this
|
|
// for better scaling performance at the cost of worse
|
|
// quality.
|
|
static const gfxFloat kScaleResolution = 2;
|
|
|
|
// Negative scaling is just a flip and irrelevant to
|
|
// our resolution calculation.
|
|
if (aVal < 0.0) {
|
|
aVal = -aVal;
|
|
}
|
|
|
|
bool inverse = false;
|
|
if (aVal < 1.0) {
|
|
inverse = true;
|
|
aVal = 1 / aVal;
|
|
}
|
|
|
|
gfxFloat power = log(aVal)/log(kScaleResolution);
|
|
|
|
// If power is within 1e-6 of an integer, round to nearest to
|
|
// prevent floating point errors, otherwise round up to the
|
|
// next integer value.
|
|
if (fabs(power - NS_round(power)) < 1e-6) {
|
|
power = NS_round(power);
|
|
} else if (inverse) {
|
|
power = floor(power);
|
|
} else {
|
|
power = ceil(power);
|
|
}
|
|
|
|
gfxFloat scale = pow(kScaleResolution, power);
|
|
|
|
if (inverse) {
|
|
scale = 1 / scale;
|
|
}
|
|
|
|
return scale;
|
|
}
|
|
|
|
|
|
/*static*/ void
|
|
gfxUtils::PathFromRegion(gfxContext* aContext, const nsIntRegion& aRegion)
|
|
{
|
|
PathFromRegionInternal(aContext, aRegion, false);
|
|
}
|
|
|
|
/*static*/ void
|
|
gfxUtils::PathFromRegionSnapped(gfxContext* aContext, const nsIntRegion& aRegion)
|
|
{
|
|
PathFromRegionInternal(aContext, aRegion, true);
|
|
}
|
|
|
|
gfxMatrix
|
|
gfxUtils::TransformRectToRect(const gfxRect& aFrom, const gfxPoint& aToTopLeft,
|
|
const gfxPoint& aToTopRight, const gfxPoint& aToBottomRight)
|
|
{
|
|
gfxMatrix m;
|
|
if (aToTopRight.y == aToTopLeft.y && aToTopRight.x == aToBottomRight.x) {
|
|
// Not a rotation, so xy and yx are zero
|
|
m.xy = m.yx = 0.0;
|
|
m.xx = (aToBottomRight.x - aToTopLeft.x)/aFrom.width;
|
|
m.yy = (aToBottomRight.y - aToTopLeft.y)/aFrom.height;
|
|
m.x0 = aToTopLeft.x - m.xx*aFrom.x;
|
|
m.y0 = aToTopLeft.y - m.yy*aFrom.y;
|
|
} else {
|
|
NS_ASSERTION(aToTopRight.y == aToBottomRight.y && aToTopRight.x == aToTopLeft.x,
|
|
"Destination rectangle not axis-aligned");
|
|
m.xx = m.yy = 0.0;
|
|
m.xy = (aToBottomRight.x - aToTopLeft.x)/aFrom.height;
|
|
m.yx = (aToBottomRight.y - aToTopLeft.y)/aFrom.width;
|
|
m.x0 = aToTopLeft.x - m.xy*aFrom.y;
|
|
m.y0 = aToTopLeft.y - m.yx*aFrom.x;
|
|
}
|
|
return m;
|
|
}
|
|
|
|
bool
|
|
gfxUtils::GfxRectToIntRect(const gfxRect& aIn, nsIntRect* aOut)
|
|
{
|
|
*aOut = nsIntRect(int32_t(aIn.X()), int32_t(aIn.Y()),
|
|
int32_t(aIn.Width()), int32_t(aIn.Height()));
|
|
return gfxRect(aOut->x, aOut->y, aOut->width, aOut->height).IsEqualEdges(aIn);
|
|
}
|
|
|
|
void
|
|
gfxUtils::GetYCbCrToRGBDestFormatAndSize(const PlanarYCbCrData& aData,
|
|
gfxImageFormat& aSuggestedFormat,
|
|
gfxIntSize& aSuggestedSize)
|
|
{
|
|
gfx::YUVType yuvtype =
|
|
gfx::TypeFromSize(aData.mYSize.width,
|
|
aData.mYSize.height,
|
|
aData.mCbCrSize.width,
|
|
aData.mCbCrSize.height);
|
|
|
|
// 'prescale' is true if the scaling is to be done as part of the
|
|
// YCbCr to RGB conversion rather than on the RGB data when rendered.
|
|
bool prescale = aSuggestedSize.width > 0 && aSuggestedSize.height > 0 &&
|
|
aSuggestedSize != aData.mPicSize;
|
|
|
|
if (aSuggestedFormat == gfxImageFormatRGB16_565) {
|
|
#if defined(HAVE_YCBCR_TO_RGB565)
|
|
if (prescale &&
|
|
!gfx::IsScaleYCbCrToRGB565Fast(aData.mPicX,
|
|
aData.mPicY,
|
|
aData.mPicSize.width,
|
|
aData.mPicSize.height,
|
|
aSuggestedSize.width,
|
|
aSuggestedSize.height,
|
|
yuvtype,
|
|
gfx::FILTER_BILINEAR) &&
|
|
gfx::IsConvertYCbCrToRGB565Fast(aData.mPicX,
|
|
aData.mPicY,
|
|
aData.mPicSize.width,
|
|
aData.mPicSize.height,
|
|
yuvtype)) {
|
|
prescale = false;
|
|
}
|
|
#else
|
|
// yuv2rgb16 function not available
|
|
aSuggestedFormat = gfxImageFormatRGB24;
|
|
#endif
|
|
}
|
|
else if (aSuggestedFormat != gfxImageFormatRGB24) {
|
|
// No other formats are currently supported.
|
|
aSuggestedFormat = gfxImageFormatRGB24;
|
|
}
|
|
if (aSuggestedFormat == gfxImageFormatRGB24) {
|
|
/* ScaleYCbCrToRGB32 does not support a picture offset, nor 4:4:4 data.
|
|
See bugs 639415 and 640073. */
|
|
if (aData.mPicX != 0 || aData.mPicY != 0 || yuvtype == gfx::YV24)
|
|
prescale = false;
|
|
}
|
|
if (!prescale) {
|
|
aSuggestedSize = aData.mPicSize;
|
|
}
|
|
}
|
|
|
|
void
|
|
gfxUtils::ConvertYCbCrToRGB(const PlanarYCbCrData& aData,
|
|
const gfxImageFormat& aDestFormat,
|
|
const gfxIntSize& aDestSize,
|
|
unsigned char* aDestBuffer,
|
|
int32_t aStride)
|
|
{
|
|
// ConvertYCbCrToRGB et al. assume the chroma planes are rounded up if the
|
|
// luma plane is odd sized.
|
|
MOZ_ASSERT((aData.mCbCrSize.width == aData.mYSize.width ||
|
|
aData.mCbCrSize.width == (aData.mYSize.width + 1) >> 1) &&
|
|
(aData.mCbCrSize.height == aData.mYSize.height ||
|
|
aData.mCbCrSize.height == (aData.mYSize.height + 1) >> 1));
|
|
gfx::YUVType yuvtype =
|
|
gfx::TypeFromSize(aData.mYSize.width,
|
|
aData.mYSize.height,
|
|
aData.mCbCrSize.width,
|
|
aData.mCbCrSize.height);
|
|
|
|
// Convert from YCbCr to RGB now, scaling the image if needed.
|
|
if (aDestSize != aData.mPicSize) {
|
|
#if defined(HAVE_YCBCR_TO_RGB565)
|
|
if (aDestFormat == gfxImageFormatRGB16_565) {
|
|
gfx::ScaleYCbCrToRGB565(aData.mYChannel,
|
|
aData.mCbChannel,
|
|
aData.mCrChannel,
|
|
aDestBuffer,
|
|
aData.mPicX,
|
|
aData.mPicY,
|
|
aData.mPicSize.width,
|
|
aData.mPicSize.height,
|
|
aDestSize.width,
|
|
aDestSize.height,
|
|
aData.mYStride,
|
|
aData.mCbCrStride,
|
|
aStride,
|
|
yuvtype,
|
|
gfx::FILTER_BILINEAR);
|
|
} else
|
|
#endif
|
|
gfx::ScaleYCbCrToRGB32(aData.mYChannel,
|
|
aData.mCbChannel,
|
|
aData.mCrChannel,
|
|
aDestBuffer,
|
|
aData.mPicSize.width,
|
|
aData.mPicSize.height,
|
|
aDestSize.width,
|
|
aDestSize.height,
|
|
aData.mYStride,
|
|
aData.mCbCrStride,
|
|
aStride,
|
|
yuvtype,
|
|
gfx::ROTATE_0,
|
|
gfx::FILTER_BILINEAR);
|
|
} else { // no prescale
|
|
#if defined(HAVE_YCBCR_TO_RGB565)
|
|
if (aDestFormat == gfxImageFormatRGB16_565) {
|
|
gfx::ConvertYCbCrToRGB565(aData.mYChannel,
|
|
aData.mCbChannel,
|
|
aData.mCrChannel,
|
|
aDestBuffer,
|
|
aData.mPicX,
|
|
aData.mPicY,
|
|
aData.mPicSize.width,
|
|
aData.mPicSize.height,
|
|
aData.mYStride,
|
|
aData.mCbCrStride,
|
|
aStride,
|
|
yuvtype);
|
|
} else // aDestFormat != gfxImageFormatRGB16_565
|
|
#endif
|
|
gfx::ConvertYCbCrToRGB32(aData.mYChannel,
|
|
aData.mCbChannel,
|
|
aData.mCrChannel,
|
|
aDestBuffer,
|
|
aData.mPicX,
|
|
aData.mPicY,
|
|
aData.mPicSize.width,
|
|
aData.mPicSize.height,
|
|
aData.mYStride,
|
|
aData.mCbCrStride,
|
|
aStride,
|
|
yuvtype);
|
|
}
|
|
}
|
|
|
|
#ifdef MOZ_DUMP_PAINTING
|
|
/* static */ void
|
|
gfxUtils::WriteAsPNG(DrawTarget* aDT, const char* aFile)
|
|
{
|
|
aDT->Flush();
|
|
nsRefPtr<gfxASurface> surf = gfxPlatform::GetPlatform()->GetThebesSurfaceForDrawTarget(aDT);
|
|
if (surf) {
|
|
surf->WriteAsPNG(aFile);
|
|
} else {
|
|
NS_WARNING("Failed to get Thebes surface!");
|
|
}
|
|
}
|
|
|
|
/* static */ void
|
|
gfxUtils::DumpAsDataURL(DrawTarget* aDT)
|
|
{
|
|
aDT->Flush();
|
|
nsRefPtr<gfxASurface> surf = gfxPlatform::GetPlatform()->GetThebesSurfaceForDrawTarget(aDT);
|
|
if (surf) {
|
|
surf->DumpAsDataURL();
|
|
} else {
|
|
NS_WARNING("Failed to get Thebes surface!");
|
|
}
|
|
}
|
|
|
|
/* static */ void
|
|
gfxUtils::CopyAsDataURL(DrawTarget* aDT)
|
|
{
|
|
aDT->Flush();
|
|
nsRefPtr<gfxASurface> surf = gfxPlatform::GetPlatform()->GetThebesSurfaceForDrawTarget(aDT);
|
|
if (surf) {
|
|
surf->CopyAsDataURL();
|
|
} else {
|
|
NS_WARNING("Failed to get Thebes surface!");
|
|
}
|
|
}
|
|
|
|
bool gfxUtils::sDumpPaintList = getenv("MOZ_DUMP_PAINT_LIST") != 0;
|
|
bool gfxUtils::sDumpPainting = getenv("MOZ_DUMP_PAINT") != 0;
|
|
bool gfxUtils::sDumpPaintingToFile = getenv("MOZ_DUMP_PAINT_TO_FILE") != 0;
|
|
FILE *gfxUtils::sDumpPaintFile = nullptr;
|
|
#endif
|