/* -*- 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) {

    if (mContext) {

      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) {

    if (mContext) {

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

                                      "drawElementsInstancedANGLE");

    }

    return;

  }

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

}

void WebGLExtensionInstancedArrays::VertexAttribDivisorANGLE(GLuint index,

                                                             GLuint divisor) {

  if (mIsLost) {

    if (mContext) {

      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