dom/canvas/WebGLExtensionInstancedArrays.cpp

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "WebGLContext.h"
   7 #include "WebGLExtensions.h"
   8 #include "mozilla/dom/WebGLRenderingContextBinding.h"
   9 #include "GLContext.h"
  10
  11 using namespace mozilla;
  12
  13 WebGLExtensionInstancedArrays::WebGLExtensionInstancedArrays(WebGLContext* context)
  14   : WebGLExtensionBase(context)
  15 {
  16     MOZ_ASSERT(IsSupported(context), "should not construct WebGLExtensionInstancedArrays: "
  17                                      "ANGLE_instanced_arrays unsupported.");
  18 }
  19
  20 WebGLExtensionInstancedArrays::~WebGLExtensionInstancedArrays()
  21 {
  22 }
  23
  24 void
  25 WebGLExtensionInstancedArrays::DrawArraysInstancedANGLE(GLenum mode, GLint first,
  26                                                         GLsizei count, GLsizei primcount)
  27 {
  28     if (mIsLost)
  29         return mContext->GenerateWarning("drawArraysInstancedANGLE: Extension is lost.");
  30
  31     mContext->DrawArraysInstanced(mode, first, count, primcount);
  32 }
  33
  34 void
  35 WebGLExtensionInstancedArrays::DrawElementsInstancedANGLE(GLenum mode, GLsizei count,
  36                                                           GLenum type, WebGLintptr offset,
  37                                                           GLsizei primcount)
  38 {
  39     if (mIsLost)
  40         return mContext->GenerateWarning("drawElementsInstancedANGLE: Extension is lost.");
  41
  42     mContext->DrawElementsInstanced(mode, count, type, offset, primcount);
  43 }
  44
  45 void
  46 WebGLExtensionInstancedArrays::VertexAttribDivisorANGLE(GLuint index, GLuint divisor)
  47 {
  48     if (mIsLost)
  49         return mContext->GenerateWarning("vertexAttribDivisorANGLE: Extension is lost.");
  50
  51     mContext->VertexAttribDivisor(index, divisor);
  52 }
  53
  54 bool
  55 WebGLExtensionInstancedArrays::IsSupported(const WebGLContext* context)
  56 {
  57     gl::GLContext* gl = context->GL();
  58
  59     return gl->IsSupported(gl::GLFeature::draw_instanced) &&
  60            gl->IsSupported(gl::GLFeature::instanced_arrays);
  61 }
  62
  63 IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionInstancedArrays)