Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 484 insertions, 0 deletions

diff --git a/dom/canvas/WebGLContextState.cpp b/dom/canvas/WebGLContextState.cpp
new file mode 100644
index 0000000000..e29c69656a
--- /dev/null
+++ b/dom/canvas/WebGLContextState.cpp
@@ -0,0 +1,484 @@
+/* -*- Mode: C++; tab-width: 4; 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 "WebGLContext.h"
+
+#include "GLContext.h"
+#include "GLScreenBuffer.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/Preferences.h"
+#include "MozFramebuffer.h"
+#include "nsString.h"
+#include "WebGLBuffer.h"
+#include "WebGLContextUtils.h"
+#include "WebGLFramebuffer.h"
+#include "WebGLProgram.h"
+#include "WebGLRenderbuffer.h"
+#include "WebGLShader.h"
+#include "WebGLTexture.h"
+#include "WebGLVertexArray.h"
+
+namespace mozilla {
+
+void WebGLContext::SetEnabled(const GLenum cap, const Maybe<GLuint> i,
+                              const bool enabled) {
+  const FuncScope funcScope(*this, "enable(i)/disable(i)");
+  if (IsContextLost()) return;
+
+  if (!ValidateCapabilityEnum(cap)) return;
+
+  if (i) {
+    if (cap != LOCAL_GL_BLEND) {
+      ErrorInvalidEnumArg("cap", cap);
+      return;
+    }
+
+    const auto limit = MaxValidDrawBuffers();
+    if (*i >= limit) {
+      ErrorInvalidValue("`index` (%u) must be < %s (%u)", *i,
+                        "MAX_DRAW_BUFFERS", limit);
+      return;
+    }
+  }
+
+  const auto slot = GetStateTrackingSlot(cap, i ? *i : 0);
+  if (slot) {
+    *slot = enabled;
+  } else if (cap == LOCAL_GL_BLEND) {
+    if (i) {
+      mBlendEnabled[*i] = enabled;
+    } else {
+      if (enabled) {
+        mBlendEnabled.set();
+      } else {
+        mBlendEnabled.reset();
+      }
+    }
+  }
+
+  switch (cap) {
+    case LOCAL_GL_DEPTH_TEST:
+    case LOCAL_GL_STENCIL_TEST:
+      break;  // Lazily applied, so don't tell GL yet or we will desync.
+
+    default:
+      // Non-lazy caps.
+      if (i) {
+        if (enabled) {
+          gl->fEnablei(cap, *i);
+        } else {
+          gl->fDisablei(cap, *i);
+        }
+      } else {
+        gl->SetEnabled(cap, enabled);
+      }
+      break;
+  }
+}
+
+bool WebGLContext::GetStencilBits(GLint* const out_stencilBits) const {
+  *out_stencilBits = 0;
+  if (mBoundDrawFramebuffer) {
+    if (!mBoundDrawFramebuffer->IsCheckFramebufferStatusComplete()) {
+      // Error, we don't know which stencil buffer's bits to use
+      ErrorInvalidFramebufferOperation(
+          "getParameter: framebuffer has two stencil buffers bound");
+      return false;
+    }
+
+    if (mBoundDrawFramebuffer->StencilAttachment().HasAttachment() ||
+        mBoundDrawFramebuffer->DepthStencilAttachment().HasAttachment()) {
+      *out_stencilBits = 8;
+    }
+  } else if (mOptions.stencil) {
+    *out_stencilBits = 8;
+  }
+
+  return true;
+}
+
+Maybe<double> WebGLContext::GetParameter(const GLenum pname) {
+  const FuncScope funcScope(*this, "getParameter");
+  if (IsContextLost()) return {};
+
+  if (IsWebGL2() || IsExtensionEnabled(WebGLExtensionID::WEBGL_draw_buffers)) {
+    if (pname == LOCAL_GL_MAX_COLOR_ATTACHMENTS) {
+      return Some(MaxValidDrawBuffers());
+
+    } else if (pname == LOCAL_GL_MAX_DRAW_BUFFERS) {
+      return Some(MaxValidDrawBuffers());
+
+    } else if (pname >= LOCAL_GL_DRAW_BUFFER0 &&
+               pname < GLenum(LOCAL_GL_DRAW_BUFFER0 + MaxValidDrawBuffers())) {
+      const auto slotId = pname - LOCAL_GL_DRAW_BUFFER0;
+      GLenum ret = LOCAL_GL_NONE;
+      if (!mBoundDrawFramebuffer) {
+        if (slotId == 0) {
+          ret = mDefaultFB_DrawBuffer0;
+        }
+      } else {
+        const auto& fb = *mBoundDrawFramebuffer;
+        const auto& bs = fb.DrawBufferEnabled();
+        if (bs[slotId]) {
+          ret = LOCAL_GL_COLOR_ATTACHMENT0 + slotId;
+        }
+      }
+      return Some(ret);
+    }
+  }
+
+  if (IsExtensionEnabled(WebGLExtensionID::EXT_disjoint_timer_query)) {
+    switch (pname) {
+      case LOCAL_GL_TIMESTAMP_EXT: {
+        uint64_t val = 0;
+        if (Has64BitTimestamps()) {
+          gl->fGetInteger64v(pname, (GLint64*)&val);
+        } else {
+          gl->fGetIntegerv(pname, (GLint*)&val);
+        }
+        // TODO: JS doesn't support 64-bit integers. Be lossy and
+        // cast to double (53 bits)
+        return Some(val);
+      }
+
+      case LOCAL_GL_GPU_DISJOINT_EXT: {
+        realGLboolean val = false;  // Not disjoint by default.
+        if (gl->IsExtensionSupported(gl::GLContext::EXT_disjoint_timer_query)) {
+          gl->fGetBooleanv(pname, &val);
+        }
+        return Some(bool(val));
+      }
+
+      default:
+        break;
+    }
+  }
+
+  if (IsWebGL2() ||
+      IsExtensionEnabled(WebGLExtensionID::OES_standard_derivatives)) {
+    if (pname == LOCAL_GL_FRAGMENT_SHADER_DERIVATIVE_HINT) {
+      GLint i = 0;
+      gl->fGetIntegerv(pname, &i);
+      return Some(i);
+    }
+  }
+
+  if (IsExtensionEnabled(WebGLExtensionID::EXT_texture_filter_anisotropic)) {
+    if (pname == LOCAL_GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT) {
+      GLfloat f = 0.f;
+      gl->fGetFloatv(pname, &f);
+      return Some(f);
+    }
+  }
+
+  if (IsExtensionEnabled(WebGLExtensionID::MOZ_debug)) {
+    if (pname == dom::MOZ_debug_Binding::DOES_INDEX_VALIDATION) {
+      return Some(mNeedsIndexValidation);
+    }
+  }
+
+  switch (pname) {
+    ////////////////////////////////
+    // Single-value params
+
+    // unsigned int
+    case LOCAL_GL_CULL_FACE_MODE:
+    case LOCAL_GL_FRONT_FACE:
+    case LOCAL_GL_ACTIVE_TEXTURE:
+    case LOCAL_GL_STENCIL_FUNC:
+    case LOCAL_GL_STENCIL_FAIL:
+    case LOCAL_GL_STENCIL_PASS_DEPTH_FAIL:
+    case LOCAL_GL_STENCIL_PASS_DEPTH_PASS:
+    case LOCAL_GL_STENCIL_BACK_FUNC:
+    case LOCAL_GL_STENCIL_BACK_FAIL:
+    case LOCAL_GL_STENCIL_BACK_PASS_DEPTH_FAIL:
+    case LOCAL_GL_STENCIL_BACK_PASS_DEPTH_PASS:
+    case LOCAL_GL_DEPTH_FUNC:
+    case LOCAL_GL_BLEND_SRC_RGB:
+    case LOCAL_GL_BLEND_SRC_ALPHA:
+    case LOCAL_GL_BLEND_DST_RGB:
+    case LOCAL_GL_BLEND_DST_ALPHA:
+    case LOCAL_GL_BLEND_EQUATION_RGB:
+    case LOCAL_GL_BLEND_EQUATION_ALPHA: {
+      GLint i = 0;
+      gl->fGetIntegerv(pname, &i);
+      return Some(i);
+    }
+
+    case LOCAL_GL_GENERATE_MIPMAP_HINT:
+      return Some(mGenerateMipmapHint);
+
+    case LOCAL_GL_IMPLEMENTATION_COLOR_READ_FORMAT:
+    case LOCAL_GL_IMPLEMENTATION_COLOR_READ_TYPE: {
+      const webgl::FormatUsageInfo* usage;
+      uint32_t width, height;
+      if (!BindCurFBForColorRead(&usage, &width, &height,
+                                 LOCAL_GL_INVALID_OPERATION))
+        return Nothing();
+
+      const auto implPI = ValidImplementationColorReadPI(usage);
+
+      GLenum ret;
+      if (pname == LOCAL_GL_IMPLEMENTATION_COLOR_READ_FORMAT) {
+        ret = implPI.format;
+      } else {
+        ret = implPI.type;
+      }
+      return Some(ret);
+    }
+
+    // int
+    case LOCAL_GL_STENCIL_REF:
+    case LOCAL_GL_STENCIL_BACK_REF: {
+      GLint stencilBits = 0;
+      if (!GetStencilBits(&stencilBits)) return Nothing();
+
+      // Assuming stencils have 8 bits
+      const GLint stencilMask = (1 << stencilBits) - 1;
+
+      GLint refValue = 0;
+      gl->fGetIntegerv(pname, &refValue);
+
+      return Some(refValue & stencilMask);
+    }
+
+    case LOCAL_GL_SAMPLE_BUFFERS:
+    case LOCAL_GL_SAMPLES: {
+      const auto& fb = mBoundDrawFramebuffer;
+      auto samples = [&]() -> Maybe<uint32_t> {
+        if (!fb) {
+          if (!EnsureDefaultFB()) return Nothing();
+          return Some(mDefaultFB->mSamples);
+        }
+
+        if (!fb->IsCheckFramebufferStatusComplete()) return Some(0);
+
+        DoBindFB(fb, LOCAL_GL_FRAMEBUFFER);
+        return Some(gl->GetIntAs<uint32_t>(LOCAL_GL_SAMPLES));
+      }();
+      if (samples && pname == LOCAL_GL_SAMPLE_BUFFERS) {
+        samples = Some(uint32_t(bool(samples.value())));
+      }
+      if (!samples) return Nothing();
+      return Some(samples.value());
+    }
+
+    case LOCAL_GL_STENCIL_CLEAR_VALUE:
+    case LOCAL_GL_SUBPIXEL_BITS: {
+      GLint i = 0;
+      gl->fGetIntegerv(pname, &i);
+      return Some(i);
+    }
+
+    case LOCAL_GL_RED_BITS:
+    case LOCAL_GL_GREEN_BITS:
+    case LOCAL_GL_BLUE_BITS:
+    case LOCAL_GL_ALPHA_BITS:
+    case LOCAL_GL_DEPTH_BITS:
+    case LOCAL_GL_STENCIL_BITS: {
+      const auto format = [&]() -> const webgl::FormatInfo* {
+        const auto& fb = mBoundDrawFramebuffer;
+        if (fb) {
+          if (!fb->IsCheckFramebufferStatusComplete()) return nullptr;
+
+          const auto& attachment = [&]() -> const auto& {
+            switch (pname) {
+              case LOCAL_GL_DEPTH_BITS:
+                if (fb->DepthStencilAttachment().HasAttachment())
+                  return fb->DepthStencilAttachment();
+                return fb->DepthAttachment();
+
+              case LOCAL_GL_STENCIL_BITS:
+                if (fb->DepthStencilAttachment().HasAttachment())
+                  return fb->DepthStencilAttachment();
+                return fb->StencilAttachment();
+
+              default:
+                return fb->ColorAttachment0();
+            }
+          }
+          ();
+
+          const auto imageInfo = attachment.GetImageInfo();
+          if (!imageInfo) return nullptr;
+          return imageInfo->mFormat->format;
+        }
+
+        auto effFormat = webgl::EffectiveFormat::RGB8;
+        switch (pname) {
+          case LOCAL_GL_DEPTH_BITS:
+            if (mOptions.depth) {
+              effFormat = webgl::EffectiveFormat::DEPTH24_STENCIL8;
+            }
+            break;
+
+          case LOCAL_GL_STENCIL_BITS:
+            if (mOptions.stencil) {
+              effFormat = webgl::EffectiveFormat::DEPTH24_STENCIL8;
+            }
+            break;
+
+          default:
+            if (mOptions.alpha) {
+              effFormat = webgl::EffectiveFormat::RGBA8;
+            }
+            break;
+        }
+        return webgl::GetFormat(effFormat);
+      }();
+      int32_t ret = 0;
+      if (format) {
+        switch (pname) {
+          case LOCAL_GL_RED_BITS:
+            ret = format->r;
+            break;
+          case LOCAL_GL_GREEN_BITS:
+            ret = format->g;
+            break;
+          case LOCAL_GL_BLUE_BITS:
+            ret = format->b;
+            break;
+          case LOCAL_GL_ALPHA_BITS:
+            ret = format->a;
+            break;
+          case LOCAL_GL_DEPTH_BITS:
+            ret = format->d;
+            break;
+          case LOCAL_GL_STENCIL_BITS:
+            ret = format->s;
+            break;
+        }
+      }
+      return Some(ret);
+    }
+
+    case LOCAL_GL_MAX_RENDERBUFFER_SIZE:
+      return Some(mGLMaxRenderbufferSize);
+
+    case LOCAL_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
+      return Some(mGLMaxVertexTextureImageUnits);
+
+    case LOCAL_GL_MAX_TEXTURE_IMAGE_UNITS:
+      return Some(mGLMaxFragmentTextureImageUnits);
+
+    case LOCAL_GL_MAX_VERTEX_UNIFORM_VECTORS:
+      return Some(mGLMaxVertexUniformVectors);
+
+    case LOCAL_GL_MAX_FRAGMENT_UNIFORM_VECTORS:
+      return Some(mGLMaxFragmentUniformVectors);
+
+    case LOCAL_GL_MAX_VARYING_VECTORS:
+      return Some(mGLMaxFragmentInputVectors);
+
+    // unsigned int. here we may have to return very large values like 2^32-1
+    // that can't be represented as javascript integer values. We just return
+    // them as doubles and javascript doesn't care.
+    case LOCAL_GL_STENCIL_BACK_VALUE_MASK:
+      return Some(mStencilValueMaskBack);
+      // pass as FP value to allow large values such as 2^32-1.
+
+    case LOCAL_GL_STENCIL_BACK_WRITEMASK:
+      return Some(mStencilWriteMaskBack);
+
+    case LOCAL_GL_STENCIL_VALUE_MASK:
+      return Some(mStencilValueMaskFront);
+
+    case LOCAL_GL_STENCIL_WRITEMASK:
+      return Some(mStencilWriteMaskFront);
+
+    case LOCAL_GL_COLOR_WRITEMASK:
+      return Some(mColorWriteMask0);
+
+    // float
+    case LOCAL_GL_LINE_WIDTH:
+      return Some((double)mLineWidth);
+
+    case LOCAL_GL_DEPTH_CLEAR_VALUE:
+    case LOCAL_GL_POLYGON_OFFSET_FACTOR:
+    case LOCAL_GL_POLYGON_OFFSET_UNITS:
+    case LOCAL_GL_SAMPLE_COVERAGE_VALUE: {
+      GLfloat f = 0.f;
+      gl->fGetFloatv(pname, &f);
+      return Some(f);
+    }
+
+    // bool
+    case LOCAL_GL_DEPTH_TEST:
+      return Some((bool)mDepthTestEnabled);
+    case LOCAL_GL_STENCIL_TEST:
+      return Some((bool)mStencilTestEnabled);
+
+    case LOCAL_GL_BLEND:
+    case LOCAL_GL_CULL_FACE:
+    case LOCAL_GL_DITHER:
+    case LOCAL_GL_POLYGON_OFFSET_FILL:
+    case LOCAL_GL_SCISSOR_TEST:
+    case LOCAL_GL_SAMPLE_COVERAGE_INVERT:
+    case LOCAL_GL_SAMPLE_ALPHA_TO_COVERAGE:
+    case LOCAL_GL_SAMPLE_COVERAGE:
+    case LOCAL_GL_DEPTH_WRITEMASK: {
+      realGLboolean b = 0;
+      gl->fGetBooleanv(pname, &b);
+      return Some(bool(b));
+    }
+
+    default:
+      break;
+  }
+
+  ErrorInvalidEnumInfo("pname", pname);
+  return Nothing();
+}
+
+bool WebGLContext::IsEnabled(GLenum cap) {
+  const FuncScope funcScope(*this, "isEnabled");
+  if (IsContextLost()) return false;
+
+  if (!ValidateCapabilityEnum(cap)) return false;
+
+  const auto& slot = GetStateTrackingSlot(cap, 0);
+  if (slot) return *slot;
+
+  return gl->fIsEnabled(cap);
+}
+
+bool WebGLContext::ValidateCapabilityEnum(GLenum cap) {
+  switch (cap) {
+    case LOCAL_GL_BLEND:
+    case LOCAL_GL_CULL_FACE:
+    case LOCAL_GL_DEPTH_TEST:
+    case LOCAL_GL_DITHER:
+    case LOCAL_GL_POLYGON_OFFSET_FILL:
+    case LOCAL_GL_SAMPLE_ALPHA_TO_COVERAGE:
+    case LOCAL_GL_SAMPLE_COVERAGE:
+    case LOCAL_GL_SCISSOR_TEST:
+    case LOCAL_GL_STENCIL_TEST:
+      return true;
+    case LOCAL_GL_RASTERIZER_DISCARD:
+      return IsWebGL2();
+    default:
+      ErrorInvalidEnumInfo("cap", cap);
+      return false;
+  }
+}
+
+bool* WebGLContext::GetStateTrackingSlot(GLenum cap, GLuint i) {
+  switch (cap) {
+    case LOCAL_GL_DEPTH_TEST:
+      return &mDepthTestEnabled;
+    case LOCAL_GL_DITHER:
+      return &mDitherEnabled;
+    case LOCAL_GL_RASTERIZER_DISCARD:
+      return &mRasterizerDiscardEnabled;
+    case LOCAL_GL_SCISSOR_TEST:
+      return &mScissorTestEnabled;
+    case LOCAL_GL_STENCIL_TEST:
+      return &mStencilTestEnabled;
+  }
+
+  return nullptr;
+}
+
+}  // namespace mozilla