| /* |
| * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * 2. Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
| * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
| * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF |
| * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #ifndef StyleCustomFilterProgram_h |
| #define StyleCustomFilterProgram_h |
| |
| #if ENABLE(CSS_SHADERS) |
| #include "CachedResourceClient.h" |
| #include "CachedResourceHandle.h" |
| #include "CachedShader.h" |
| #include "CustomFilterProgram.h" |
| #include "StyleShader.h" |
| #include <wtf/FastAllocBase.h> |
| |
| namespace WebCore { |
| |
| // CSS Shaders |
| |
| class StyleCustomFilterProgram : public CustomFilterProgram, public CachedResourceClient { |
| WTF_MAKE_FAST_ALLOCATED; |
| public: |
| static PassRefPtr<StyleCustomFilterProgram> create(PassRefPtr<StyleShader> vertexShader, PassRefPtr<StyleShader> fragmentShader, CustomFilterProgramType programType, const CustomFilterProgramMixSettings& mixSettings, CustomFilterMeshType meshType) |
| { |
| return adoptRef(new StyleCustomFilterProgram(vertexShader, fragmentShader, programType, mixSettings, meshType)); |
| } |
| |
| void setVertexShader(PassRefPtr<StyleShader> shader) { m_vertexShader = shader; } |
| StyleShader* vertexShader() const { return m_vertexShader.get(); } |
| |
| void setFragmentShader(PassRefPtr<StyleShader> shader) { m_fragmentShader = shader; } |
| StyleShader* fragmentShader() const { return m_fragmentShader.get(); } |
| |
| virtual String vertexShaderString() const |
| { |
| ASSERT(isLoaded()); |
| return m_cachedVertexShader.get() ? m_cachedVertexShader->shaderString() : String(); |
| } |
| |
| virtual String fragmentShaderString() const |
| { |
| ASSERT(isLoaded()); |
| return m_cachedFragmentShader.get() ? m_cachedFragmentShader->shaderString() : String(); |
| } |
| |
| virtual bool isLoaded() const |
| { |
| // Do not use the CachedResource:isLoaded method here, because it actually means !isLoading(), |
| // so missing and canceled resources will have isLoaded set to true, even if they are not loaded yet. |
| return (!m_cachedVertexShader.get() || m_isVertexShaderLoaded) |
| && (!m_cachedFragmentShader.get() || m_isFragmentShaderLoaded); |
| } |
| |
| virtual void willHaveClients() |
| { |
| if (m_vertexShader) { |
| m_cachedVertexShader = m_vertexShader->cachedShader(); |
| m_cachedVertexShader->addClient(this); |
| } |
| if (m_fragmentShader) { |
| m_cachedFragmentShader = m_fragmentShader->cachedShader(); |
| m_cachedFragmentShader->addClient(this); |
| } |
| } |
| |
| virtual void didRemoveLastClient() |
| { |
| if (m_cachedVertexShader.get()) { |
| m_cachedVertexShader->removeClient(this); |
| m_cachedVertexShader = 0; |
| m_isVertexShaderLoaded = false; |
| } |
| if (m_cachedFragmentShader.get()) { |
| m_cachedFragmentShader->removeClient(this); |
| m_cachedFragmentShader = 0; |
| m_isFragmentShaderLoaded = false; |
| } |
| } |
| |
| virtual void notifyFinished(CachedResource* resource) |
| { |
| if (resource->errorOccurred()) |
| return; |
| // Note that m_cachedVertexShader might be equal to m_cachedFragmentShader and it would only get one event in that case. |
| if (resource == m_cachedVertexShader.get()) |
| m_isVertexShaderLoaded = true; |
| if (resource == m_cachedFragmentShader.get()) |
| m_isFragmentShaderLoaded = true; |
| if (isLoaded()) |
| notifyClients(); |
| } |
| |
| CachedShader* cachedVertexShader() const { return m_vertexShader ? m_vertexShader->cachedShader() : 0; } |
| CachedShader* cachedFragmentShader() const { return m_fragmentShader ? m_fragmentShader->cachedShader() : 0; } |
| |
| virtual bool operator==(const CustomFilterProgram& o) const |
| { |
| // We don't use the != operator because that would recursively call this method. |
| if (!CustomFilterProgram::operator==(o)) |
| return false; |
| |
| // The following cast is ugly, but StyleCustomFilterProgram is the single implementation of CustomFilterProgram. |
| const StyleCustomFilterProgram* other = static_cast<const StyleCustomFilterProgram*>(&o); |
| return cachedVertexShader() == other->cachedVertexShader() && cachedFragmentShader() == other->cachedFragmentShader(); |
| } |
| |
| private: |
| StyleCustomFilterProgram(PassRefPtr<StyleShader> vertexShader, PassRefPtr<StyleShader> fragmentShader, CustomFilterProgramType programType, const CustomFilterProgramMixSettings& mixSettings, CustomFilterMeshType meshType) |
| : CustomFilterProgram(programType, mixSettings, meshType) |
| , m_vertexShader(vertexShader) |
| , m_fragmentShader(fragmentShader) |
| , m_isVertexShaderLoaded(false) |
| , m_isFragmentShaderLoaded(false) |
| { |
| } |
| |
| RefPtr<StyleShader> m_vertexShader; |
| RefPtr<StyleShader> m_fragmentShader; |
| |
| CachedResourceHandle<CachedShader> m_cachedVertexShader; |
| CachedResourceHandle<CachedShader> m_cachedFragmentShader; |
| |
| bool m_isVertexShaderLoaded; |
| bool m_isFragmentShaderLoaded; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(CSS_SHADERS) |
| |
| #endif // StyleCustomFilterProgram_h |