tor-browser

The Tor Browser
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WebGL2ContextSamplers.cpp (2989B)

      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 "GLContext.h"
      7 #include "WebGL2Context.h"
      8 #include "WebGLSampler.h"
      9 
     10 namespace mozilla {
     11 
     12 RefPtr<WebGLSampler> WebGL2Context::CreateSampler() {
     13  const FuncScope funcScope(*this, "createSampler");
     14  if (IsContextLost()) return nullptr;
     15 
     16  return new WebGLSampler(this);
     17 }
     18 
     19 void WebGL2Context::BindSampler(GLuint unit, WebGLSampler* sampler) {
     20  FuncScope funcScope(*this, "bindSampler");
     21  if (IsContextLost()) return;
     22  funcScope.mBindFailureGuard = true;
     23 
     24  if (sampler && !ValidateObject("sampler", *sampler)) return;
     25 
     26  if (unit >= mBoundSamplers.Length())
     27    return ErrorInvalidValue("unit must be < %u", mBoundSamplers.Length());
     28 
     29  ////
     30 
     31  gl->fBindSampler(unit, sampler ? sampler->mGLName : 0);
     32 
     33  mBoundSamplers[unit] = sampler;
     34 
     35  funcScope.mBindFailureGuard = false;
     36 }
     37 
     38 void WebGL2Context::SamplerParameteri(WebGLSampler& sampler, GLenum pname,
     39                                      GLint param) {
     40  const FuncScope funcScope(*this, "samplerParameteri");
     41  if (IsContextLost()) return;
     42 
     43  if (!ValidateObject("sampler", sampler)) return;
     44 
     45  sampler.SamplerParameter(pname, FloatOrInt(param));
     46 }
     47 
     48 void WebGL2Context::SamplerParameterf(WebGLSampler& sampler, GLenum pname,
     49                                      GLfloat param) {
     50  const FuncScope funcScope(*this, "samplerParameterf");
     51  if (IsContextLost()) return;
     52 
     53  if (!ValidateObject("sampler", sampler)) return;
     54 
     55  sampler.SamplerParameter(pname, FloatOrInt(param));
     56 }
     57 
     58 Maybe<double> WebGL2Context::GetSamplerParameter(const WebGLSampler& sampler,
     59                                                 GLenum pname) const {
     60  const FuncScope funcScope(*this, "getSamplerParameter");
     61  if (IsContextLost()) return {};
     62 
     63  if (!ValidateObject("sampler", sampler)) return {};
     64 
     65  ////
     66 
     67  const auto fnAsFloat = [&]() {
     68    GLfloat param = 0;
     69    gl->fGetSamplerParameterfv(sampler.mGLName, pname, &param);
     70    return param;
     71  };
     72 
     73  switch (pname) {
     74    case LOCAL_GL_TEXTURE_MIN_FILTER:
     75    case LOCAL_GL_TEXTURE_MAG_FILTER:
     76    case LOCAL_GL_TEXTURE_WRAP_S:
     77    case LOCAL_GL_TEXTURE_WRAP_T:
     78    case LOCAL_GL_TEXTURE_WRAP_R:
     79    case LOCAL_GL_TEXTURE_COMPARE_MODE:
     80    case LOCAL_GL_TEXTURE_COMPARE_FUNC: {
     81      GLint param = 0;
     82      gl->fGetSamplerParameteriv(sampler.mGLName, pname, &param);
     83      return Some(param);
     84    }
     85    case LOCAL_GL_TEXTURE_MIN_LOD:
     86    case LOCAL_GL_TEXTURE_MAX_LOD:
     87      return Some(fnAsFloat());
     88 
     89    case LOCAL_GL_TEXTURE_MAX_ANISOTROPY:
     90      if (!IsExtensionEnabled(
     91              WebGLExtensionID::EXT_texture_filter_anisotropic)) {
     92        break;
     93      }
     94      return Some(fnAsFloat());
     95 
     96    default:
     97      break;
     98  }
     99  ErrorInvalidEnumInfo("pname", pname);
    100  return {};
    101 }
    102 
    103 }  // namespace mozilla