1 files changed, 168 insertions, 0 deletions
diff --git a/dom/canvas/WebGLSampler.cpp b/dom/canvas/WebGLSampler.cpp
new file mode 100644
index 0000000000..5ab179e4b5
--- /dev/null
+++ b/dom/canvas/WebGLSampler.cpp
@@ -0,0 +1,168 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WebGLSampler.h"
+
+#include "GLContext.h"
+#include "mozilla/dom/WebGL2RenderingContextBinding.h"
+#include "WebGLContext.h"
+
+namespace mozilla {
+
+WebGLSampler::WebGLSampler(WebGLContext* const webgl)
+    : WebGLContextBoundObject(webgl), mGLName([&]() {
+        GLuint ret = 0;
+        webgl->gl->fGenSamplers(1, &ret);
+        return ret;
+      }()) {}
+
+WebGLSampler::~WebGLSampler() {
+  if (!mContext) return;
+  mContext->gl->fDeleteSamplers(1, &mGLName);
+}
+
+static bool ValidateSamplerParameterParams(WebGLContext* webgl, GLenum pname,
+                                           const FloatOrInt& param) {
+  const auto& paramInt = param.i;
+  bool pnameValid = true;
+  switch (pname) {
+    case LOCAL_GL_TEXTURE_MIN_FILTER:
+      switch (paramInt) {
+        case LOCAL_GL_NEAREST:
+        case LOCAL_GL_LINEAR:
+        case LOCAL_GL_NEAREST_MIPMAP_NEAREST:
+        case LOCAL_GL_NEAREST_MIPMAP_LINEAR:
+        case LOCAL_GL_LINEAR_MIPMAP_NEAREST:
+        case LOCAL_GL_LINEAR_MIPMAP_LINEAR:
+          return true;
+
+        default:
+          break;
+      }
+      break;
+
+    case LOCAL_GL_TEXTURE_MAG_FILTER:
+      switch (paramInt) {
+        case LOCAL_GL_NEAREST:
+        case LOCAL_GL_LINEAR:
+          return true;
+
+        default:
+          break;
+      }
+      break;
+
+    case LOCAL_GL_TEXTURE_WRAP_S:
+    case LOCAL_GL_TEXTURE_WRAP_T:
+    case LOCAL_GL_TEXTURE_WRAP_R:
+      switch (paramInt) {
+        case LOCAL_GL_CLAMP_TO_EDGE:
+        case LOCAL_GL_REPEAT:
+        case LOCAL_GL_MIRRORED_REPEAT:
+          return true;
+
+        default:
+          break;
+      }
+      break;
+
+    case LOCAL_GL_TEXTURE_MIN_LOD:
+    case LOCAL_GL_TEXTURE_MAX_LOD:
+      return true;
+
+    case LOCAL_GL_TEXTURE_COMPARE_MODE:
+      switch (paramInt) {
+        case LOCAL_GL_NONE:
+        case LOCAL_GL_COMPARE_REF_TO_TEXTURE:
+          return true;
+
+        default:
+          break;
+      }
+      break;
+
+    case LOCAL_GL_TEXTURE_COMPARE_FUNC:
+      switch (paramInt) {
+        case LOCAL_GL_LEQUAL:
+        case LOCAL_GL_GEQUAL:
+        case LOCAL_GL_LESS:
+        case LOCAL_GL_GREATER:
+        case LOCAL_GL_EQUAL:
+        case LOCAL_GL_NOTEQUAL:
+        case LOCAL_GL_ALWAYS:
+        case LOCAL_GL_NEVER:
+          return true;
+
+        default:
+          break;
+      }
+      break;
+
+    case LOCAL_GL_TEXTURE_MAX_ANISOTROPY:
+      if (webgl->IsExtensionEnabled(
+              WebGLExtensionID::EXT_texture_filter_anisotropic)) {
+        return true;
+      }
+      pnameValid = false;
+      break;
+
+    default:
+      pnameValid = false;
+      break;
+  }
+
+  if (!pnameValid) {
+    webgl->ErrorInvalidEnumInfo("pname", pname);
+    return false;
+  }
+
+  webgl->ErrorInvalidEnumInfo("param", paramInt);
+  return false;
+}
+
+void WebGLSampler::SamplerParameter(GLenum pname, const FloatOrInt& param) {
+  if (!ValidateSamplerParameterParams(mContext, pname, param)) return;
+
+  bool invalidate = true;
+  switch (pname) {
+    case LOCAL_GL_TEXTURE_MIN_FILTER:
+      mState.minFilter = param.i;
+      break;
+
+    case LOCAL_GL_TEXTURE_MAG_FILTER:
+      mState.magFilter = param.i;
+      break;
+
+    case LOCAL_GL_TEXTURE_WRAP_S:
+      mState.wrapS = param.i;
+      break;
+
+    case LOCAL_GL_TEXTURE_WRAP_T:
+      mState.wrapT = param.i;
+      break;
+
+    case LOCAL_GL_TEXTURE_COMPARE_MODE:
+      mState.compareMode = param.i;
+      break;
+
+    default:
+      invalidate = false;
+      break;
+  }
+
+  if (invalidate) {
+    InvalidateCaches();
+  }
+
+  ////
+
+  if (param.isFloat) {
+    mContext->gl->fSamplerParameterf(mGLName, pname, param.f);
+  } else {
+    mContext->gl->fSamplerParameteri(mGLName, pname, param.i);
+  }
+}
+
+}  // namespace mozilla