dom/canvas/WebGL2ContextUniforms.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
   8 #include "GLContext.h"
   9 #include "js/Array.h"  // JS::NewArrayObject
  10 #include "mozilla/dom/WebGL2RenderingContextBinding.h"
  11 #include "mozilla/RefPtr.h"
  12 #include "WebGLBuffer.h"
  13 #include "WebGLContext.h"
  14 #include "WebGLProgram.h"
  15 #include "WebGLTransformFeedback.h"
  16 #include "WebGLVertexArray.h"
  17
  18 namespace mozilla {
  19
  20 // -------------------------------------------------------------------------
  21 // Uniform Buffer Objects and Transform Feedback Buffers
  22
  23 Maybe<double> WebGL2Context::GetIndexedParameter(const GLenum pname,
  24                                                  const uint32_t index) const {
  25   const FuncScope funcScope(*this, "getIndexedParameter");
  26   if (IsContextLost()) return {};
  27
  28   const auto* bindings = &mIndexedUniformBufferBindings;
  29   const char* limitStr = "MAX_UNIFORM_BUFFER_BINDINGS";
  30   switch (pname) {
  31     case LOCAL_GL_UNIFORM_BUFFER_START:
  32     case LOCAL_GL_UNIFORM_BUFFER_SIZE:
  33       break;
  34
  35     case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_START:
  36     case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_SIZE:
  37       bindings = &(mBoundTransformFeedback->mIndexedBindings);
  38       limitStr = "MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS";
  39       break;
  40
  41     default:
  42       ErrorInvalidEnumInfo("pname", pname);
  43       return {};
  44   }
  45
  46   if (index >= bindings->size()) {
  47     ErrorInvalidValue("`index` must be < %s.", limitStr);
  48     return {};
  49   }
  50   const auto& binding = (*bindings)[index];
  51
  52   switch (pname) {
  53     case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_START:
  54     case LOCAL_GL_UNIFORM_BUFFER_START:
  55       return Some(binding.mRangeStart);
  56       break;
  57
  58     case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_SIZE:
  59     case LOCAL_GL_UNIFORM_BUFFER_SIZE:
  60       return Some(binding.mRangeSize);
  61
  62     default:
  63       MOZ_CRASH("impossible");
  64   }
  65 }
  66
  67 void WebGL2Context::UniformBlockBinding(WebGLProgram& program,
  68                                         GLuint uniformBlockIndex,
  69                                         GLuint uniformBlockBinding) {
  70   const FuncScope funcScope(*this, "uniformBlockBinding");
  71   if (IsContextLost()) return;
  72
  73   if (!ValidateObject("program", program)) return;
  74
  75   program.UniformBlockBinding(uniformBlockIndex, uniformBlockBinding);
  76 }
  77
  78 }  // namespace mozilla