dom/canvas/WebGL2ContextTransformFeedback.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   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 "WebGL2Context.h"
   7 #include "WebGLProgram.h"
   8 #include "WebGLTransformFeedback.h"
   9 #include "GLContext.h"
  10
  11 namespace mozilla {
  12
  13 // -------------------------------------------------------------------------
  14 // Transform Feedback
  15
  16 RefPtr<WebGLTransformFeedback> WebGL2Context::CreateTransformFeedback() {
  17   const FuncScope funcScope(*this, "createTransformFeedback");
  18   if (IsContextLost()) return nullptr;
  19
  20   GLuint tf = 0;
  21   gl->fGenTransformFeedbacks(1, &tf);
  22
  23   return new WebGLTransformFeedback(this, tf);
  24 }
  25
  26 void WebGL2Context::BindTransformFeedback(WebGLTransformFeedback* tf) {
  27   FuncScope funcScope(*this, "bindTransformFeedback");
  28   if (IsContextLost()) return;
  29   funcScope.mBindFailureGuard = true;
  30
  31   if (tf && !ValidateObject("tf", *tf)) return;
  32
  33   if (mBoundTransformFeedback->mIsActive &&
  34       !mBoundTransformFeedback->mIsPaused) {
  35     ErrorInvalidOperation(
  36         "Currently bound transform feedback is active and not"
  37         " paused.");
  38     return;
  39   }
  40
  41   ////
  42
  43   mBoundTransformFeedback = (tf ? tf : mDefaultTransformFeedback.get());
  44
  45   gl->fBindTransformFeedback(LOCAL_GL_TRANSFORM_FEEDBACK,
  46                              mBoundTransformFeedback->mGLName);
  47
  48   if (mBoundTransformFeedback) {
  49     mBoundTransformFeedback->mHasBeenBound = true;
  50   }
  51
  52   funcScope.mBindFailureGuard = false;
  53 }
  54
  55 void WebGL2Context::BeginTransformFeedback(GLenum primMode) {
  56   const FuncScope funcScope(*this, "beginTransformFeedback");
  57   if (IsContextLost()) return;
  58
  59   mBoundTransformFeedback->BeginTransformFeedback(primMode);
  60 }
  61
  62 void WebGL2Context::EndTransformFeedback() {
  63   const FuncScope funcScope(*this, "endTransformFeedback");
  64   if (IsContextLost()) return;
  65
  66   mBoundTransformFeedback->EndTransformFeedback();
  67 }
  68
  69 void WebGL2Context::PauseTransformFeedback() {
  70   const FuncScope funcScope(*this, "pauseTransformFeedback");
  71   if (IsContextLost()) return;
  72
  73   mBoundTransformFeedback->PauseTransformFeedback();
  74 }
  75
  76 void WebGL2Context::ResumeTransformFeedback() {
  77   const FuncScope funcScope(*this, "resumeTransformFeedback");
  78   if (IsContextLost()) return;
  79
  80   mBoundTransformFeedback->ResumeTransformFeedback();
  81 }
  82
  83 void WebGL2Context::TransformFeedbackVaryings(
  84     WebGLProgram& program, const std::vector<std::string>& varyings,
  85     GLenum bufferMode) const {
  86   const FuncScope funcScope(*this, "transformFeedbackVaryings");
  87   if (IsContextLost()) return;
  88
  89   if (!ValidateObject("program", program)) return;
  90
  91   program.TransformFeedbackVaryings(varyings, bufferMode);
  92 }
  93
  94 }  // namespace mozilla