Source/WebCore/html/canvas/WebGLColorBufferFloat.cpp

/*
 * Copyright (C) 2020 Google Inc. All rights reserved.
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#include "config.h"

#if ENABLE(WEBGL)
#include "WebGLColorBufferFloat.h"

#include "ExtensionsGL.h"
#include <wtf/IsoMallocInlines.h>

namespace WebCore {

WTF_MAKE_ISO_ALLOCATED_IMPL(WebGLColorBufferFloat);

WebGLColorBufferFloat::WebGLColorBufferFloat(WebGLRenderingContextBase& context)
    : WebGLExtension(context)
{
    context.graphicsContextGL()->getExtensions().ensureEnabled("GL_CHROMIUM_color_buffer_float_rgba"_s);
    // Optimistically enable RGB floating-point render targets also, if possible.
    context.graphicsContextGL()->getExtensions().ensureEnabled("GL_CHROMIUM_color_buffer_float_rgb"_s);
    // https://github.com/KhronosGroup/WebGL/pull/2830
    // Spec requires EXT_float_blend to be turned on implicitly here.
    context.graphicsContextGL()->getExtensions().ensureEnabled("GL_EXT_float_blend"_s);
}

WebGLColorBufferFloat::~WebGLColorBufferFloat() = default;

WebGLExtension::ExtensionName WebGLColorBufferFloat::getName() const
{
    return WebGLColorBufferFloatName;
}

bool WebGLColorBufferFloat::supported(const WebGLRenderingContextBase& context)
{
    return context.graphicsContextGL()->getExtensions().supports("GL_OES_texture_float"_s)
        && context.graphicsContextGL()->getExtensions().supports("GL_CHROMIUM_color_buffer_float_rgba"_s);
}

} // namespace WebCore

#endif // ENABLE(WEBGL)