/platform/external/webkit/WebCore/bindings/js/JSWebGLArrayBufferConstructor.h

https://github.com/aharish/totoro-gb-opensource-update2 · C Header · 97 lines · 50 code · 15 blank · 32 comment · 6 complexity · 23203efc194d8db15018141843541f53 MD5 · raw file

  1. /*
  2. * Copyright (C) 2009 Apple Inc. All rights reserved.
  3. *
  4. * Redistribution and use in source and binary forms, with or without
  5. * modification, are permitted provided that the following conditions
  6. * are met:
  7. * 1. Redistributions of source code must retain the above copyright
  8. * notice, this list of conditions and the following disclaimer.
  9. * 2. Redistributions in binary form must reproduce the above copyright
  10. * notice, this list of conditions and the following disclaimer in the
  11. * documentation and/or other materials provided with the distribution.
  12. *
  13. * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14. * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16. * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17. * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18. * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19. * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20. * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21. * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24. */
  25. #ifndef JSWebGLArrayBufferConstructor_h
  26. #define JSWebGLArrayBufferConstructor_h
  27. #include "JSDOMBinding.h"
  28. #include "JSDocument.h"
  29. #include "JSWebGLArrayBuffer.h"
  30. #include <runtime/Error.h>
  31. namespace WebCore {
  32. class WebGLArray;
  33. // Template function used by CanvasXXXArrayConstructors
  34. template<class C, typename T>
  35. PassRefPtr<WebGLArray> construct(JSC::ExecState* exec, const JSC::ArgList& args)
  36. {
  37. // There are 3 constructors:
  38. //
  39. // 1) (in int size)
  40. // 2) (in WebGLArrayBuffer buffer, [Optional] in int offset, [Optional] in unsigned int length)
  41. // 3) (in sequence<T>) - This ends up being a JS "array-like" object
  42. //
  43. RefPtr<C> arrayObject;
  44. // For the 0 args case, just create an object without a buffer
  45. if (args.size() < 1)
  46. return C::create(0, 0, 0);
  47. if (args.at(0).isObject()) {
  48. RefPtr<WebGLArrayBuffer> buffer = toWebGLArrayBuffer(args.at(0));
  49. if (buffer) {
  50. int offset = (args.size() > 1) ? args.at(1).toInt32(exec) : 0;
  51. unsigned int length = (args.size() > 2) ? static_cast<unsigned int>(args.at(2).toInt32(exec)) : 0;
  52. return C::create(buffer, offset, length);
  53. }
  54. JSC::JSObject* array = asObject(args.at(0));
  55. int length = array->get(exec, JSC::Identifier(exec, "length")).toInt32(exec);
  56. void* tempValues;
  57. if (!tryFastMalloc(length * sizeof(T)).getValue(tempValues)) {
  58. throwError(exec, JSC::GeneralError);
  59. return 0;
  60. }
  61. OwnFastMallocPtr<T> values(static_cast<T*>(tempValues));
  62. for (int i = 0; i < length; ++i) {
  63. JSC::JSValue v = array->get(exec, i);
  64. if (exec->hadException())
  65. return 0;
  66. values.get()[i] = static_cast<T>(v.toNumber(exec));
  67. }
  68. return C::create(values.get(), length);
  69. }
  70. unsigned size = static_cast<unsigned>(args.at(0).toInt32(exec));
  71. return C::create(size);
  72. }
  73. class JSWebGLArrayBufferConstructor : public DOMConstructorObject {
  74. public:
  75. JSWebGLArrayBufferConstructor(JSC::ExecState*, JSDOMGlobalObject*);
  76. static const JSC::ClassInfo s_info;
  77. private:
  78. virtual JSC::ConstructType getConstructData(JSC::ConstructData&);
  79. virtual const JSC::ClassInfo* classInfo() const { return &s_info; }
  80. };
  81. }
  82. #endif // JSWebGLArrayBufferConstructor_h