gfx/thebes/PrintTargetThebes.cpp

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "PrintTargetThebes.h"
   7
   8 #include "gfxASurface.h"
   9 #include "gfxPlatform.h"
  10 #include "mozilla/gfx/Logging.h"
  11
  12 namespace mozilla::gfx {
  13
  14 /* static */
  15 already_AddRefed<PrintTargetThebes> PrintTargetThebes::CreateOrNull(
  16     gfxASurface* aSurface) {
  17   MOZ_ASSERT(aSurface);
  18
  19   if (!aSurface || aSurface->CairoStatus()) {
  20     return nullptr;
  21   }
  22
  23   RefPtr<PrintTargetThebes> target = new PrintTargetThebes(aSurface);
  24
  25   return target.forget();
  26 }
  27
  28 PrintTargetThebes::PrintTargetThebes(gfxASurface* aSurface)
  29     : PrintTarget(nullptr, aSurface->GetSize()), mGfxSurface(aSurface) {}
  30
  31 already_AddRefed<DrawTarget> PrintTargetThebes::MakeDrawTarget(
  32     const IntSize& aSize, DrawEventRecorder* aRecorder) {
  33   // This should not be called outside of BeginPage()/EndPage() calls since
  34   // some backends can only provide a valid DrawTarget at that time.
  35   MOZ_ASSERT(mHasActivePage, "We can't guarantee a valid DrawTarget");
  36
  37   RefPtr<gfx::DrawTarget> dt =
  38       gfxPlatform::CreateDrawTargetForSurface(mGfxSurface, aSize);
  39   if (!dt || !dt->IsValid()) {
  40     return nullptr;
  41   }
  42
  43   if (aRecorder) {
  44     dt = CreateRecordingDrawTarget(aRecorder, dt);
  45     if (!dt || !dt->IsValid()) {
  46       return nullptr;
  47     }
  48   }
  49
  50   return dt.forget();
  51 }
  52
  53 already_AddRefed<DrawTarget> PrintTargetThebes::GetReferenceDrawTarget() {
  54   if (!mRefDT) {
  55     RefPtr<gfx::DrawTarget> dt =
  56         gfxPlatform::CreateDrawTargetForSurface(mGfxSurface, mSize);
  57     if (!dt || !dt->IsValid()) {
  58       return nullptr;
  59     }
  60     mRefDT = dt->CreateSimilarDrawTarget(IntSize(1, 1), dt->GetFormat());
  61   }
  62
  63   return do_AddRef(mRefDT);
  64 }
  65
  66 nsresult PrintTargetThebes::BeginPrinting(const nsAString& aTitle,
  67                                           const nsAString& aPrintToFileName,
  68                                           int32_t aStartPage,
  69                                           int32_t aEndPage) {
  70   return mGfxSurface->BeginPrinting(aTitle, aPrintToFileName);
  71 }
  72
  73 nsresult PrintTargetThebes::EndPrinting() { return mGfxSurface->EndPrinting(); }
  74
  75 nsresult PrintTargetThebes::AbortPrinting() {
  76 #ifdef DEBUG
  77   mHasActivePage = false;
  78 #endif
  79   return mGfxSurface->AbortPrinting();
  80 }
  81
  82 nsresult PrintTargetThebes::BeginPage(const IntSize& aSizeInPoints) {
  83 #ifdef DEBUG
  84   mHasActivePage = true;
  85 #endif
  86   return mGfxSurface->BeginPage();
  87 }
  88
  89 nsresult PrintTargetThebes::EndPage() {
  90 #ifdef DEBUG
  91   mHasActivePage = false;
  92 #endif
  93   return mGfxSurface->EndPage();
  94 }
  95
  96 void PrintTargetThebes::Finish() { return mGfxSurface->Finish(); }
  97
  98 }  // namespace mozilla::gfx