Please support WEBGL_compressed_texture_etc1 extension (and possibly WEBGL_compressed_texture_etc too)
https://bugs.webkit.org/show_bug.cgi?id=197900
Patch by Kenneth Russell <kbr@chromium.org> on 2019-11-07
Reviewed by Dean Jackson.
Support the ETC1 and ETC2 compressed texture formats in WebKit's WebGL
implementation.
Tested by changing the code to allocate an OpenGL ES 3.0 context for WebGL,
and running in the iOS Simulator. The WebGL conformance tests
webgl-compressed-texture-etc.html and webgl-compressed-texture-etc1.html all
pass with these changes.
When an ANGLE backend is supported on iOS, these extensions will
automatically be supported, and some of the new validation code can be
removed.
* CMakeLists.txt:
* DerivedSources-input.xcfilelist:
* DerivedSources-output.xcfilelist:
* DerivedSources.make:
* Sources.txt:
* WebCore.xcodeproj/project.pbxproj:
* bindings/js/JSDOMConvertWebGL.cpp:
(WebCore::convertToJSValue):
* html/canvas/WebGL2RenderingContext.cpp:
(WebCore::WebGL2RenderingContext::getExtension):
(WebCore::WebGL2RenderingContext::getSupportedExtensions):
* html/canvas/WebGLCompressedTextureETC.cpp: Added.
(WebCore::WebGLCompressedTextureETC::WebGLCompressedTextureETC):
(WebCore::WebGLCompressedTextureETC::getName const):
(WebCore::WebGLCompressedTextureETC::supported):
* html/canvas/WebGLCompressedTextureETC.h: Added.
* html/canvas/WebGLCompressedTextureETC.idl: Added.
* html/canvas/WebGLCompressedTextureETC1.cpp: Added.
(WebCore::WebGLCompressedTextureETC1::WebGLCompressedTextureETC1):
(WebCore::WebGLCompressedTextureETC1::getName const):
(WebCore::WebGLCompressedTextureETC1::supported):
* html/canvas/WebGLCompressedTextureETC1.h: Added.
* html/canvas/WebGLCompressedTextureETC1.idl: Added.
* html/canvas/WebGLExtension.h:
* html/canvas/WebGLRenderingContext.cpp:
(WebCore::WebGLRenderingContext::getExtension):
(WebCore::WebGLRenderingContext::getSupportedExtensions):
* html/canvas/WebGLRenderingContextBase.cpp:
(WebCore::WebGLRenderingContextBase::extensionIsEnabled):
(WebCore::WebGLRenderingContextBase::validateCompressedTexFuncData):
(WebCore::WebGLRenderingContextBase::validateCompressedTexDimensions):
(WebCore::WebGLRenderingContextBase::validateCompressedTexSubDimensions):
* html/canvas/WebGLRenderingContextBase.h:
* platform/graphics/Extensions3D.h:
* platform/graphics/cocoa/GraphicsContext3DCocoa.mm:
(WebCore::GraphicsContext3D::GraphicsContext3D):
* platform/graphics/opengl/Extensions3DOpenGL.cpp:
(WebCore::Extensions3DOpenGL::supportsExtension):
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@252226 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/Source/WebCore/html/canvas/WebGLCompressedTextureETC1.cpp b/Source/WebCore/html/canvas/WebGLCompressedTextureETC1.cpp
new file mode 100644
index 0000000..bdc3bee
--- /dev/null
+++ b/Source/WebCore/html/canvas/WebGLCompressedTextureETC1.cpp
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2019 Google Inc. 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 APPLE INC. AND ITS CONTRIBUTORS ``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 APPLE INC. OR ITS CONTRIBUTORS
+ * 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.
+ */
+
+#include "config.h"
+
+#if ENABLE(WEBGL)
+#include "WebGLCompressedTextureETC1.h"
+
+#include "Extensions3D.h"
+#include "WebGLRenderingContextBase.h"
+
+namespace WebCore {
+
+WebGLCompressedTextureETC1::WebGLCompressedTextureETC1(WebGLRenderingContextBase& context)
+ : WebGLExtension(context)
+{
+ context.graphicsContext3D()->getExtensions().ensureEnabled("GL_OES_compressed_ETC1_RGB8_texture");
+
+ context.addCompressedTextureFormat(Extensions3D::ETC1_RGB8_OES);
+}
+
+WebGLCompressedTextureETC1::~WebGLCompressedTextureETC1() = default;
+
+WebGLExtension::ExtensionName WebGLCompressedTextureETC1::getName() const
+{
+ return WebGLCompressedTextureETC1Name;
+}
+
+bool WebGLCompressedTextureETC1::supported(WebGLRenderingContextBase& context)
+{
+ return context.graphicsContext3D()->getExtensions().supports("GL_OES_compressed_ETC1_RGB8_texture");
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WEBGL)
