Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

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

1 files changed, 225 insertions, 0 deletions

diff --git a/gfx/gl/MozFramebuffer.cpp b/gfx/gl/MozFramebuffer.cpp
new file mode 100644
index 0000000000..10995a7ee1
--- /dev/null
+++ b/gfx/gl/MozFramebuffer.cpp
@@ -0,0 +1,225 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 4; -*- */
+/* 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 "MozFramebuffer.h"
+
+#include "GLContext.h"
+#include "mozilla/gfx/Logging.h"
+#include "ScopedGLHelpers.h"
+
+namespace mozilla {
+namespace gl {
+
+static void DeleteByTarget(GLContext* const gl, const GLenum target,
+                           const GLuint name) {
+  if (target == LOCAL_GL_RENDERBUFFER) {
+    gl->DeleteRenderbuffer(name);
+  } else {
+    gl->DeleteTexture(name);
+  }
+}
+
+UniquePtr<MozFramebuffer> MozFramebuffer::Create(GLContext* const gl,
+                                                 const gfx::IntSize& size,
+                                                 const uint32_t samples,
+                                                 const bool depthStencil) {
+  if (samples && !gl->IsSupported(GLFeature::framebuffer_multisample))
+    return nullptr;
+
+  if (uint32_t(size.width) > gl->MaxTexOrRbSize() ||
+      uint32_t(size.height) > gl->MaxTexOrRbSize() ||
+      samples > gl->MaxSamples()) {
+    return nullptr;
+  }
+
+  gl->MakeCurrent();
+
+  GLContext::LocalErrorScope errorScope(*gl);
+
+  GLenum colorTarget;
+  GLuint colorName;
+  if (samples) {
+    colorTarget = LOCAL_GL_RENDERBUFFER;
+    colorName = gl->CreateRenderbuffer();
+    const ScopedBindRenderbuffer bindRB(gl, colorName);
+    gl->fRenderbufferStorageMultisample(colorTarget, samples, LOCAL_GL_RGBA8,
+                                        size.width, size.height);
+  } else {
+    colorTarget = LOCAL_GL_TEXTURE_2D;
+    colorName = gl->CreateTexture();
+    const ScopedBindTexture bindTex(gl, colorName);
+    gl->TexParams_SetClampNoMips();
+    gl->fTexImage2D(colorTarget, 0, LOCAL_GL_RGBA, size.width, size.height, 0,
+                    LOCAL_GL_RGBA, LOCAL_GL_UNSIGNED_BYTE, nullptr);
+  }
+
+  const auto err = errorScope.GetError();
+  if (err) {
+    if (err != LOCAL_GL_OUT_OF_MEMORY) {
+      gfxCriticalNote << "Unexpected error: " << gfx::hexa(err) << ": "
+                      << GLContext::GLErrorToString(err);
+    }
+    DeleteByTarget(gl, colorTarget, colorName);
+    return nullptr;
+  }
+
+  return CreateImpl(
+      gl, size, samples,
+      depthStencil ? DepthAndStencilBuffer::Create(gl, size, samples) : nullptr,
+      colorTarget, colorName);
+}
+
+UniquePtr<MozFramebuffer> MozFramebuffer::CreateForBacking(
+    GLContext* const gl, const gfx::IntSize& size, const uint32_t samples,
+    bool depthStencil, const GLenum colorTarget, const GLuint colorName) {
+  return CreateImpl(
+      gl, size, samples,
+      depthStencil ? DepthAndStencilBuffer::Create(gl, size, samples) : nullptr,
+      colorTarget, colorName);
+}
+
+/* static */ UniquePtr<MozFramebuffer>
+MozFramebuffer::CreateForBackingWithSharedDepthAndStencil(
+    const gfx::IntSize& size, const uint32_t samples, GLenum colorTarget,
+    GLuint colorName,
+    const RefPtr<DepthAndStencilBuffer>& depthAndStencilBuffer) {
+  auto gl = depthAndStencilBuffer->gl();
+  if (!gl || !gl->MakeCurrent()) {
+    return nullptr;
+  }
+  return CreateImpl(gl, size, samples, depthAndStencilBuffer, colorTarget,
+                    colorName);
+}
+
+/* static */ UniquePtr<MozFramebuffer> MozFramebuffer::CreateImpl(
+    GLContext* const gl, const gfx::IntSize& size, const uint32_t samples,
+    const RefPtr<DepthAndStencilBuffer>& depthAndStencilBuffer,
+    const GLenum colorTarget, const GLuint colorName) {
+  GLuint fb = gl->CreateFramebuffer();
+  const ScopedBindFramebuffer bindFB(gl, fb);
+
+  if (colorTarget == LOCAL_GL_RENDERBUFFER) {
+    gl->fFramebufferRenderbuffer(LOCAL_GL_FRAMEBUFFER,
+                                 LOCAL_GL_COLOR_ATTACHMENT0, colorTarget,
+                                 colorName);
+  } else {
+    gl->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER, LOCAL_GL_COLOR_ATTACHMENT0,
+                              colorTarget, colorName, 0);
+  }
+
+  if (depthAndStencilBuffer) {
+    gl->fFramebufferRenderbuffer(
+        LOCAL_GL_FRAMEBUFFER, LOCAL_GL_DEPTH_ATTACHMENT, LOCAL_GL_RENDERBUFFER,
+        depthAndStencilBuffer->mDepthRB);
+    gl->fFramebufferRenderbuffer(
+        LOCAL_GL_FRAMEBUFFER, LOCAL_GL_STENCIL_ATTACHMENT,
+        LOCAL_GL_RENDERBUFFER, depthAndStencilBuffer->mStencilRB);
+  }
+
+  const auto status = gl->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
+  if (status != LOCAL_GL_FRAMEBUFFER_COMPLETE) {
+    gfxCriticalNote << "MozFramebuffer::CreateImpl(size:" << size
+                    << ", samples:" << samples
+                    << ", depthAndStencil:" << bool(depthAndStencilBuffer)
+                    << ", colorTarget:" << gfx::hexa(colorTarget)
+                    << ", colorName:" << colorName << "): Incomplete: 0x"
+                    << gfx::hexa(status);
+    return nullptr;
+  }
+
+  return UniquePtr<MozFramebuffer>(new MozFramebuffer(
+      gl, size, fb, samples, depthAndStencilBuffer, colorTarget, colorName));
+}
+
+/* static */ RefPtr<DepthAndStencilBuffer> DepthAndStencilBuffer::Create(
+    GLContext* const gl, const gfx::IntSize& size, const uint32_t samples) {
+  const auto fnAllocRB = [&](GLenum format) {
+    GLuint rb = gl->CreateRenderbuffer();
+    const ScopedBindRenderbuffer bindRB(gl, rb);
+    if (samples) {
+      gl->fRenderbufferStorageMultisample(LOCAL_GL_RENDERBUFFER, samples,
+                                          format, size.width, size.height);
+    } else {
+      gl->fRenderbufferStorage(LOCAL_GL_RENDERBUFFER, format, size.width,
+                               size.height);
+    }
+    return rb;
+  };
+
+  GLuint depthRB, stencilRB;
+  {
+    GLContext::LocalErrorScope errorScope(*gl);
+
+    if (gl->IsSupported(GLFeature::packed_depth_stencil)) {
+      depthRB = fnAllocRB(LOCAL_GL_DEPTH24_STENCIL8);
+      stencilRB = depthRB;  // Ignore unused mStencilRB.
+    } else {
+      depthRB = fnAllocRB(LOCAL_GL_DEPTH_COMPONENT24);
+      stencilRB = fnAllocRB(LOCAL_GL_STENCIL_INDEX8);
+    }
+
+    const auto err = errorScope.GetError();
+    if (err) {
+      MOZ_ASSERT(err == LOCAL_GL_OUT_OF_MEMORY);
+      return nullptr;
+    }
+  }
+
+  return new DepthAndStencilBuffer(gl, size, depthRB, stencilRB);
+}
+
+////////////////////
+
+MozFramebuffer::MozFramebuffer(
+    GLContext* const gl, const gfx::IntSize& size, GLuint fb,
+    const uint32_t samples, RefPtr<DepthAndStencilBuffer> depthAndStencilBuffer,
+    const GLenum colorTarget, const GLuint colorName)
+    : mWeakGL(gl),
+      mSize(size),
+      mSamples(samples),
+      mFB(fb),
+      mColorTarget(colorTarget),
+      mDepthAndStencilBuffer(std::move(depthAndStencilBuffer)),
+      mColorName(colorName) {
+  MOZ_ASSERT(mColorTarget);
+  MOZ_ASSERT(mColorName);
+}
+
+MozFramebuffer::~MozFramebuffer() {
+  GLContext* const gl = mWeakGL;
+  if (!gl || !gl->MakeCurrent()) {
+    return;
+  }
+
+  gl->DeleteFramebuffer(mFB);
+
+  DeleteByTarget(gl, mColorTarget, mColorName);
+}
+
+bool MozFramebuffer::HasDepth() const {
+  return mDepthAndStencilBuffer && mDepthAndStencilBuffer->mDepthRB;
+}
+
+bool MozFramebuffer::HasStencil() const {
+  return mDepthAndStencilBuffer && mDepthAndStencilBuffer->mStencilRB;
+}
+
+DepthAndStencilBuffer::DepthAndStencilBuffer(GLContext* gl,
+                                             const gfx::IntSize& size,
+                                             GLuint depthRB, GLuint stencilRB)
+    : mWeakGL(gl), mSize(size), mDepthRB(depthRB), mStencilRB(stencilRB) {}
+
+DepthAndStencilBuffer::~DepthAndStencilBuffer() {
+  GLContext* const gl = mWeakGL;
+  if (!gl || !gl->MakeCurrent()) {
+    return;
+  }
+
+  gl->DeleteRenderbuffer(mDepthRB);
+  gl->DeleteRenderbuffer(mStencilRB);
+}
+
+}  // namespace gl
+}  // namespace mozilla