/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "WebGL2Context.h"

#include "GLContext.h"
#include "WebGLContextUtils.h"

namespace mozilla {

void WebGL2Context::GetInternalformatParameter(JSContext* cx, GLenum target,
                                               GLenum internalformat,
                                               GLenum pname,
                                               JS::MutableHandleValue retval,
                                               ErrorResult& out_rv) {
  const char funcName[] = "getInternalfomratParameter";
  retval.setObjectOrNull(nullptr);

  if (IsContextLost()) return;

  if (target != LOCAL_GL_RENDERBUFFER) {
    ErrorInvalidEnum("%s: `target` must be RENDERBUFFER, was: 0x%04x.",
                     funcName, target);
    return;
  }

  // GLES 3.0.4 $4.4.4 p212:
  // "An internal format is color-renderable if it is one of the formats from
  // table 3.13
  //  noted as color-renderable or if it is unsized format RGBA or RGB."

  GLenum sizedFormat;
  switch (internalformat) {
    case LOCAL_GL_RGB:
      sizedFormat = LOCAL_GL_RGB8;
      break;
    case LOCAL_GL_RGBA:
      sizedFormat = LOCAL_GL_RGBA8;
      break;
    default:
      sizedFormat = internalformat;
      break;
  }

  // In RenderbufferStorage, we allow DEPTH_STENCIL. Therefore, it is accepted
  // for internalformat as well. Please ignore the conformance test fail for
  // DEPTH_STENCIL.

  const auto usage = mFormatUsage->GetRBUsage(sizedFormat);
  if (!usage) {
    ErrorInvalidEnum(
        "%s: `internalformat` must be color-, depth-, or stencil-renderable, "
        "was: 0x%04x.",
        funcName, internalformat);
    return;
  }

  if (pname != LOCAL_GL_SAMPLES) {
    ErrorInvalidEnumInfo("%s: `pname` must be SAMPLES, was 0x%04x.", funcName,
                         pname);
    return;
  }

  GLint* samples = nullptr;
  GLint sampleCount = 0;
  gl->fGetInternalformativ(LOCAL_GL_RENDERBUFFER, internalformat,
                           LOCAL_GL_NUM_SAMPLE_COUNTS, 1, &sampleCount);
  if (sampleCount > 0) {
    samples = new GLint[sampleCount];
    gl->fGetInternalformativ(LOCAL_GL_RENDERBUFFER, internalformat,
                             LOCAL_GL_SAMPLES, sampleCount, samples);
  }

  JSObject* obj = dom::Int32Array::Create(cx, this, sampleCount, samples);
  if (!obj) {
    out_rv = NS_ERROR_OUT_OF_MEMORY;
  }

  delete[] samples;

  retval.setObjectOrNull(obj);
}

void WebGL2Context::RenderbufferStorageMultisample(GLenum target,
                                                   GLsizei samples,
                                                   GLenum internalFormat,
                                                   GLsizei width,
                                                   GLsizei height) {
  const char funcName[] = "renderbufferStorageMultisample";
  if (IsContextLost()) return;

  RenderbufferStorage_base(funcName, target, samples, internalFormat, width,
                           height);
}

}  // namespace mozilla