/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/* 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 {

WebGLExtensionInstancedArrays::WebGLExtensionInstancedArrays(WebGLContext* webgl)

  : WebGLExtensionBase(webgl)

{

    MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");

}

WebGLExtensionInstancedArrays::~WebGLExtensionInstancedArrays()

{

}

void

WebGLExtensionInstancedArrays::DrawArraysInstancedANGLE(GLenum mode,

                                                        GLint first,

                                                        GLsizei count,

                                                        GLsizei primcount)

{

    if (mIsLost) {

        mContext->ErrorInvalidOperation("%s: Extension is lost.",

                                        "drawArraysInstancedANGLE");

        return;

    }

    mContext->DrawArraysInstanced(mode, first, count, primcount);

}

void

WebGLExtensionInstancedArrays::DrawElementsInstancedANGLE(GLenum mode,

                                                          GLsizei count,

                                                          GLenum type,

                                                          WebGLintptr offset,

                                                          GLsizei primcount)

{

    if (mIsLost) {

        mContext->ErrorInvalidOperation("%s: Extension is lost.",

                                        "drawElementsInstancedANGLE");

        return;

    }

    mContext->DrawElementsInstanced(mode, count, type, offset, primcount);

}

void

WebGLExtensionInstancedArrays::VertexAttribDivisorANGLE(GLuint index,

                                                        GLuint divisor)

{

    if (mIsLost) {

        mContext->ErrorInvalidOperation("%s: Extension is lost.",

                                        "vertexAttribDivisorANGLE");

        return;

    }

    mContext->VertexAttribDivisor(index, divisor);

}

bool

WebGLExtensionInstancedArrays::IsSupported(const WebGLContext* webgl)

{

    gl::GLContext* gl = webgl->GL();

    return gl->IsSupported(gl::GLFeature::draw_instanced) &&

           gl->IsSupported(gl::GLFeature::instanced_arrays);

}

IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionInstancedArrays, ANGLE_instanced_arrays)

} // namespace mozilla