third_party/blink/renderer/modules/webgl/webgl_multi_draw.h

// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGL_WEBGL_MULTI_DRAW_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGL_WEBGL_MULTI_DRAW_H_

#include "third_party/blink/renderer/bindings/modules/v8/int32_array_or_long_sequence.h"
#include "third_party/blink/renderer/modules/webgl/webgl_extension.h"
#include "third_party/blink/renderer/modules/webgl/webgl_multi_draw_common.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"

namespace blink {

class WebGLMultiDraw final : public WebGLExtension,
                             public WebGLMultiDrawCommon {
  DEFINE_WRAPPERTYPEINFO();

 public:
  static WebGLMultiDraw* Create(WebGLRenderingContextBase*);
  static bool Supported(WebGLRenderingContextBase*);
  static const char* ExtensionName();

  explicit WebGLMultiDraw(WebGLRenderingContextBase*);
  WebGLExtensionName GetName() const override;

  void multiDrawArraysWEBGL(GLenum mode,
                            Int32ArrayOrLongSequence firstsList,
                            GLuint firstsOffset,
                            Int32ArrayOrLongSequence countsList,
                            GLuint countsOffset,
                            GLsizei drawcount) {
    multiDrawArraysImpl(mode, MakeSpan(firstsList), firstsOffset,
                        MakeSpan(countsList), countsOffset, drawcount);
  }

  void multiDrawElementsWEBGL(GLenum mode,
                              Int32ArrayOrLongSequence countsList,
                              GLuint countsOffset,
                              GLenum type,
                              Int32ArrayOrLongSequence offsetsList,
                              GLuint offsetsOffset,
                              GLsizei drawcount) {
    multiDrawElementsImpl(mode, MakeSpan(countsList), countsOffset, type,
                          MakeSpan(offsetsList), offsetsOffset, drawcount);
  }

 private:
  void multiDrawArraysImpl(GLenum mode,
                           const base::span<const int32_t>& firsts,
                           GLuint firstsOffset,
                           const base::span<const int32_t>& counts,
                           GLuint countsOffset,
                           GLsizei drawcount);

  void multiDrawElementsImpl(GLenum mode,
                             const base::span<const int32_t>& counts,
                             GLuint countsOffset,
                             GLenum type,
                             const base::span<const int32_t>& offsets,
                             GLuint offsetsOffset,
                             GLsizei drawcount);
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBGL_WEBGL_MULTI_DRAW_H_