/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "WebGLExtensions.h"

#include "GLContext.h"
#include "mozilla/dom/WebGLRenderingContextBinding.h"
#include "WebGLContext.h"

namespace mozilla {

WebGLExtensionCompressedTextureASTC::WebGLExtensionCompressedTextureASTC(WebGLContext* webgl)
    : WebGLExtensionBase(webgl)
{
    MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");

    RefPtr<WebGLContext> webgl_ = webgl; // Bug 1201275
    const auto fnAdd = [&webgl_](GLenum sizedFormat, webgl::EffectiveFormat effFormat) {
        auto& fua = webgl_->mFormatUsage;

        auto usage = fua->EditUsage(effFormat);
        usage->isFilterable = true;
        fua->AllowSizedTexFormat(sizedFormat, usage);

        webgl_->mCompressedTextureFormats.AppendElement(sizedFormat);
    };

#define FOO(x) LOCAL_GL_ ## x, webgl::EffectiveFormat::x

    fnAdd(FOO(COMPRESSED_RGBA_ASTC_4x4_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_5x4_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_5x5_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_6x5_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_6x6_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_8x5_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_8x6_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_8x8_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_10x5_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_10x6_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_10x8_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_10x10_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_12x10_KHR));
    fnAdd(FOO(COMPRESSED_RGBA_ASTC_12x12_KHR));

    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR));
    fnAdd(FOO(COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR));

#undef FOO
}

WebGLExtensionCompressedTextureASTC::~WebGLExtensionCompressedTextureASTC()
{
}

void
WebGLExtensionCompressedTextureASTC::GetSupportedProfiles(dom::Nullable< nsTArray<nsString> >& retval) const
{
    retval.SetNull();
    if (mIsLost) {
        mContext->ErrorInvalidOperation("%s: Extension is lost.",
                                        "drawElementsInstancedANGLE");
        return;
    }

    nsTArray<nsString>& arr = retval.SetValue();
    arr.AppendElement(NS_LITERAL_STRING("ldr"));

    if (mContext->gl->IsExtensionSupported(gl::GLContext::KHR_texture_compression_astc_hdr)) {
        arr.AppendElement(NS_LITERAL_STRING("hdr"));
    }
}

bool
WebGLExtensionCompressedTextureASTC::IsSupported(const WebGLContext* webgl)
{
    gl::GLContext* gl = webgl->GL();
    return gl->IsExtensionSupported(gl::GLContext::KHR_texture_compression_astc_ldr);
}

IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionCompressedTextureASTC, WEBGL_compressed_texture_astc)

} // namespace mozilla