2 * Copyright (C) 2009 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "core/html/canvas/WebGLRenderingContext.h"
29 #include "core/frame/LocalFrame.h"
30 #include "core/html/canvas/ANGLEInstancedArrays.h"
31 #include "core/html/canvas/EXTBlendMinMax.h"
32 #include "core/html/canvas/EXTFragDepth.h"
33 #include "core/html/canvas/EXTShaderTextureLOD.h"
34 #include "core/html/canvas/EXTTextureFilterAnisotropic.h"
35 #include "core/html/canvas/EXTsRGB.h"
36 #include "core/html/canvas/OESElementIndexUint.h"
37 #include "core/html/canvas/OESStandardDerivatives.h"
38 #include "core/html/canvas/OESTextureFloat.h"
39 #include "core/html/canvas/OESTextureFloatLinear.h"
40 #include "core/html/canvas/OESTextureHalfFloat.h"
41 #include "core/html/canvas/OESTextureHalfFloatLinear.h"
42 #include "core/html/canvas/OESVertexArrayObject.h"
43 #include "core/html/canvas/WebGLCompressedTextureATC.h"
44 #include "core/html/canvas/WebGLCompressedTextureETC1.h"
45 #include "core/html/canvas/WebGLCompressedTexturePVRTC.h"
46 #include "core/html/canvas/WebGLCompressedTextureS3TC.h"
47 #include "core/html/canvas/WebGLContextAttributes.h"
48 #include "core/html/canvas/WebGLContextEvent.h"
49 #include "core/html/canvas/WebGLDebugRendererInfo.h"
50 #include "core/html/canvas/WebGLDebugShaders.h"
51 #include "core/html/canvas/WebGLDepthTexture.h"
52 #include "core/html/canvas/WebGLDrawBuffers.h"
53 #include "core/html/canvas/WebGLLoseContext.h"
54 #include "core/loader/FrameLoader.h"
55 #include "core/loader/FrameLoaderClient.h"
56 #include "core/frame/Settings.h"
57 #include "core/rendering/RenderBox.h"
58 #include "platform/CheckedInt.h"
59 #include "platform/graphics/gpu/DrawingBuffer.h"
60 #include "public/platform/Platform.h"
64 PassOwnPtrWillBeRawPtr<WebGLRenderingContext> WebGLRenderingContext::create(HTMLCanvasElement* canvas, WebGLContextAttributes* attrs)
66 Document& document = canvas->document();
67 LocalFrame* frame = document.frame();
69 canvas->dispatchEvent(WebGLContextEvent::create(EventTypeNames::webglcontextcreationerror, false, true, "Web page was not allowed to create a WebGL context."));
72 Settings* settings = frame->settings();
74 // The FrameLoaderClient might block creation of a new WebGL context despite the page settings; in
75 // particular, if WebGL contexts were lost one or more times via the GL_ARB_robustness extension.
76 if (!frame->loader().client()->allowWebGL(settings && settings->webGLEnabled())) {
77 canvas->dispatchEvent(WebGLContextEvent::create(EventTypeNames::webglcontextcreationerror, false, true, "Web page was not allowed to create a WebGL context."));
81 // The only situation that attrs is null is through Document::getCSSCanvasContext().
82 RefPtrWillBeRawPtr<WebGLContextAttributes> defaultAttrs = nullptr;
84 defaultAttrs = WebGLContextAttributes::create();
85 attrs = defaultAttrs.get();
87 blink::WebGraphicsContext3D::Attributes attributes = attrs->attributes(document.topDocument().url().string(), settings, 1);
88 blink::WebGLInfo glInfo;
89 OwnPtr<blink::WebGraphicsContext3D> context = adoptPtr(blink::Platform::current()->createOffscreenGraphicsContext3D(attributes, 0, &glInfo));
91 String statusMessage("Could not create a WebGL context for VendorInfo = ");
92 statusMessage.append(glInfo.vendorInfo);
93 statusMessage.append(", RendererInfo = ");
94 statusMessage.append(glInfo.rendererInfo);
95 statusMessage.append(", DriverInfo = ");
96 statusMessage.append(glInfo.driverVersion);
97 statusMessage.append(".");
98 canvas->dispatchEvent(WebGLContextEvent::create(EventTypeNames::webglcontextcreationerror, false, true, statusMessage));
102 OwnPtr<Extensions3DUtil> extensionsUtil = Extensions3DUtil::create(context.get());
105 if (extensionsUtil->supportsExtension("GL_EXT_debug_marker"))
106 context->pushGroupMarkerEXT("WebGLRenderingContext");
108 OwnPtrWillBeRawPtr<WebGLRenderingContext> renderingContext = adoptPtrWillBeNoop(new WebGLRenderingContext(canvas, context.release(), attrs));
109 renderingContext->registerContextExtensions();
110 renderingContext->suspendIfNeeded();
112 if (!renderingContext->drawingBuffer()) {
113 canvas->dispatchEvent(WebGLContextEvent::create(EventTypeNames::webglcontextcreationerror, false, true, "Could not create a WebGL context."));
117 return renderingContext.release();
120 WebGLRenderingContext::WebGLRenderingContext(HTMLCanvasElement* passedCanvas, PassOwnPtr<blink::WebGraphicsContext3D> context, WebGLContextAttributes* requestedAttributes)
121 : WebGLRenderingContextBase(passedCanvas, context, requestedAttributes)
125 WebGLRenderingContext::~WebGLRenderingContext()
129 void WebGLRenderingContext::registerContextExtensions()
131 // Register extensions.
132 static const char* const bothPrefixes[] = { "", "WEBKIT_", 0, };
134 registerExtension<ANGLEInstancedArrays>(m_angleInstancedArrays);
135 registerExtension<EXTBlendMinMax>(m_extBlendMinMax);
136 registerExtension<EXTFragDepth>(m_extFragDepth);
137 registerExtension<EXTShaderTextureLOD>(m_extShaderTextureLOD);
138 registerExtension<EXTsRGB>(m_extsRGB);
139 registerExtension<EXTTextureFilterAnisotropic>(m_extTextureFilterAnisotropic, ApprovedExtension, bothPrefixes);
140 registerExtension<OESElementIndexUint>(m_oesElementIndexUint);
141 registerExtension<OESStandardDerivatives>(m_oesStandardDerivatives);
142 registerExtension<OESTextureFloat>(m_oesTextureFloat);
143 registerExtension<OESTextureFloatLinear>(m_oesTextureFloatLinear);
144 registerExtension<OESTextureHalfFloat>(m_oesTextureHalfFloat);
145 registerExtension<OESTextureHalfFloatLinear>(m_oesTextureHalfFloatLinear);
146 registerExtension<OESVertexArrayObject>(m_oesVertexArrayObject);
147 registerExtension<WebGLCompressedTextureATC>(m_webglCompressedTextureATC, ApprovedExtension, bothPrefixes);
148 registerExtension<WebGLCompressedTextureETC1>(m_webglCompressedTextureETC1);
149 registerExtension<WebGLCompressedTexturePVRTC>(m_webglCompressedTexturePVRTC, ApprovedExtension, bothPrefixes);
150 registerExtension<WebGLCompressedTextureS3TC>(m_webglCompressedTextureS3TC, ApprovedExtension, bothPrefixes);
151 registerExtension<WebGLDebugRendererInfo>(m_webglDebugRendererInfo);
152 registerExtension<WebGLDebugShaders>(m_webglDebugShaders);
153 registerExtension<WebGLDepthTexture>(m_webglDepthTexture, ApprovedExtension, bothPrefixes);
154 registerExtension<WebGLDrawBuffers>(m_webglDrawBuffers);
155 registerExtension<WebGLLoseContext>(m_webglLoseContext, ApprovedExtension, bothPrefixes);
158 void WebGLRenderingContext::trace(Visitor* visitor)
160 visitor->trace(m_angleInstancedArrays);
161 visitor->trace(m_extBlendMinMax);
162 visitor->trace(m_extFragDepth);
163 visitor->trace(m_extShaderTextureLOD);
164 visitor->trace(m_extsRGB);
165 visitor->trace(m_extTextureFilterAnisotropic);
166 visitor->trace(m_oesTextureFloat);
167 visitor->trace(m_oesTextureFloatLinear);
168 visitor->trace(m_oesTextureHalfFloat);
169 visitor->trace(m_oesTextureHalfFloatLinear);
170 visitor->trace(m_oesStandardDerivatives);
171 visitor->trace(m_oesVertexArrayObject);
172 visitor->trace(m_oesElementIndexUint);
173 visitor->trace(m_webglLoseContext);
174 visitor->trace(m_webglDebugRendererInfo);
175 visitor->trace(m_webglDebugShaders);
176 visitor->trace(m_webglDrawBuffers);
177 visitor->trace(m_webglCompressedTextureATC);
178 visitor->trace(m_webglCompressedTextureETC1);
179 visitor->trace(m_webglCompressedTexturePVRTC);
180 visitor->trace(m_webglCompressedTextureS3TC);
181 visitor->trace(m_webglDepthTexture);
182 WebGLRenderingContextBase::trace(visitor);