[webkit-changes] [WebKit/WebKit] 7d3126: Associate a purpose for each GraphicsContextState ...

[Said Abou-Hallawa]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 7d3126b3705a8d90653f9efad3c6d7246307bd09
      https://github.com/WebKit/WebKit/commit/7d3126b3705a8d90653f9efad3c6d7246307bd09
  Author: Said Abou-Hallawa <said at apple.com>
  Date:   2023-09-08 (Fri, 08 Sep 2023)

  Changed paths:
    M Source/WebCore/platform/graphics/BifurcatedGraphicsContext.cpp
    M Source/WebCore/platform/graphics/BifurcatedGraphicsContext.h
    M Source/WebCore/platform/graphics/FontCascade.cpp
    M Source/WebCore/platform/graphics/GraphicsContext.cpp
    M Source/WebCore/platform/graphics/GraphicsContext.h
    M Source/WebCore/platform/graphics/GraphicsContextState.cpp
    M Source/WebCore/platform/graphics/GraphicsContextState.h
    M Source/WebCore/platform/graphics/NullGraphicsContext.h
    M Source/WebCore/platform/graphics/cairo/GraphicsContextCairo.cpp
    M Source/WebCore/platform/graphics/cairo/GraphicsContextCairo.h
    M Source/WebCore/platform/graphics/cg/GraphicsContextCG.cpp
    M Source/WebCore/platform/graphics/cg/GraphicsContextCG.h
    M Source/WebCore/platform/graphics/displaylists/DisplayListRecorder.cpp
    M Source/WebCore/platform/graphics/displaylists/DisplayListRecorder.h
    M Source/WebCore/platform/graphics/nicosia/cairo/NicosiaCairoOperationRecorder.cpp
    M Source/WebCore/platform/graphics/nicosia/cairo/NicosiaCairoOperationRecorder.h

  Log Message:
  -----------
  Associate a purpose for each GraphicsContextState in the context state stack
https://bugs.webkit.org/show_bug.cgi?id=261296
rdar://115138846

Reviewed by Simon Fraser.

We internally call GraphicsContext::save() when we begin a transparency layer and
we call GraphicsContext::restore() when we end the transparency layer.

Differentiating when this happens from normal save/restore will make it easy to
unwind the stack of the GraphicsContextState and the transparency layers in the
right order.

* Source/WebCore/platform/graphics/BifurcatedGraphicsContext.cpp:
(WebCore::BifurcatedGraphicsContext::save):
(WebCore::BifurcatedGraphicsContext::restore):
(WebCore::BifurcatedGraphicsContext::beginTransparencyLayer):
(WebCore::BifurcatedGraphicsContext::endTransparencyLayer):
* Source/WebCore/platform/graphics/BifurcatedGraphicsContext.h:
* Source/WebCore/platform/graphics/FontCascade.cpp:
(WebCore::FontCascade::displayListForTextRun const):
* Source/WebCore/platform/graphics/GraphicsContext.cpp:
(WebCore::GraphicsContext::save):
(WebCore::GraphicsContext::restore):
* Source/WebCore/platform/graphics/GraphicsContext.h:
* Source/WebCore/platform/graphics/GraphicsContextState.cpp:
(WebCore::GraphicsContextState::repurpose):
(WebCore::GraphicsContextState::clone const):
(WebCore::GraphicsContextState::cloneForRecording const): Deleted.
(WebCore::GraphicsContextState::didBeginTransparencyLayer): Deleted.
* Source/WebCore/platform/graphics/GraphicsContextState.h:
(WebCore::GraphicsContextState::purpose const):
* Source/WebCore/platform/graphics/NullGraphicsContext.h:
* Source/WebCore/platform/graphics/cairo/GraphicsContextCairo.cpp:
(WebCore::GraphicsContextCairo::save):
(WebCore::GraphicsContextCairo::restore):
* Source/WebCore/platform/graphics/cairo/GraphicsContextCairo.h:
* Source/WebCore/platform/graphics/cg/GraphicsContextCG.cpp:
(WebCore::GraphicsContextCG::save):
(WebCore::GraphicsContextCG::restore):
(WebCore::GraphicsContextCG::beginTransparencyLayer):
(WebCore::GraphicsContextCG::endTransparencyLayer):
* Source/WebCore/platform/graphics/cg/GraphicsContextCG.h:
* Source/WebCore/platform/graphics/displaylists/DisplayListRecorder.cpp:
(WebCore::DisplayList::Recorder::save):
(WebCore::DisplayList::Recorder::restore):
(WebCore::DisplayList::Recorder::beginTransparencyLayer):
(WebCore::DisplayList::Recorder::endTransparencyLayer):
* Source/WebCore/platform/graphics/displaylists/DisplayListRecorder.h:
(WebCore::DisplayList::Recorder::ContextState::cloneForTransparencyLayer const):
(WebCore::DisplayList::Recorder::ContextState::ContextState): Deleted.
* Source/WebCore/platform/graphics/nicosia/cairo/NicosiaCairoOperationRecorder.cpp:
(Nicosia::CairoOperationRecorder::save):
(Nicosia::CairoOperationRecorder::restore):
* Source/WebCore/platform/graphics/nicosia/cairo/NicosiaCairoOperationRecorder.h:

Canonical link: https://commits.webkit.org/267790@main