started porting renderer to new portable form

2019-10-31 19:14:58 +11:00
parent d96395ea27
commit 77bcb70dac
77 changed files with 789 additions and 2237 deletions
@@ -0,0 +1,157 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2019 Olive Team
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "openglframebuffer.h"
+
+#include <QDebug>
+#include <QOpenGLExtraFunctions>
+
+OpenGLFramebuffer::OpenGLFramebuffer() :
+  context_(nullptr),
+  buffer_(0),
+  texture_(nullptr)
+{
+
+}
+
+OpenGLFramebuffer::~OpenGLFramebuffer()
+{
+  Destroy();
+}
+
+void OpenGLFramebuffer::Create(QOpenGLContext *ctx)
+{
+  if (ctx == nullptr) {
+    qWarning() << tr("RenderTexture::Create was passed an invalid context");
+    return;
+  }
+
+  // Free any previous framebuffer
+  Destroy();
+
+  context_ = ctx;
+
+  connect(context_, SIGNAL(aboutToBeDestroyed()), this, SLOT(Destroy()));
+
+  // Create framebuffer object
+  context_->functions()->glGenFramebuffers(1, &buffer_);
+}
+
+void OpenGLFramebuffer::Destroy()
+{
+  if (context_ != nullptr) {
+    disconnect(context_, SIGNAL(aboutToBeDestroyed()), this, SLOT(Destroy()));
+
+    context_->functions()->glDeleteFramebuffers(1, &buffer_);
+
+    buffer_ = 0;
+
+    context_ = nullptr;
+  }
+}
+
+bool OpenGLFramebuffer::IsCreated() const
+{
+  return (buffer_ > 0);
+}
+
+void OpenGLFramebuffer::Bind()
+{
+  if (context_ == nullptr) {
+    return;
+  }
+  context_->functions()->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, buffer_);
+}
+
+void OpenGLFramebuffer::Release()
+{
+  if (context_ == nullptr) {
+    return;
+  }
+  context_->functions()->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+}
+
+void OpenGLFramebuffer::Attach(RenderTexturePtr texture)
+{
+  if (context_ == nullptr) {
+    return;
+  }
+
+  texture_ = texture;
+  AttachInternal(texture_->texture(), false);
+}
+
+void OpenGLFramebuffer::AttachBackBuffer(RenderTexturePtr texture)
+{
+  if (context_ == nullptr) {
+    return;
+  }
+
+  texture_ = texture;
+  AttachInternal(texture_->back_texture(), true);
+}
+
+void OpenGLFramebuffer::Detach()
+{
+  if (context_ == nullptr) {
+    return;
+  }
+
+  QOpenGLFunctions* f = context_->functions();
+
+  // bind framebuffer for attaching
+  f->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, buffer_);
+
+  context_->extraFunctions()->glFramebufferTexture2D(
+        GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0
+        );
+
+  // release framebuffer
+  f->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+
+  texture_ = nullptr;
+}
+
+const GLuint &OpenGLFramebuffer::buffer() const
+{
+  return buffer_;
+}
+
+void OpenGLFramebuffer::AttachInternal(GLuint tex, bool clear)
+{
+  Detach();
+
+  QOpenGLFunctions* f = context_->functions();
+
+  // bind framebuffer for attaching
+  f->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, buffer_);
+
+  context_->extraFunctions()->glFramebufferTexture2D(
+        GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tex, 0
+        );
+
+  if (clear) {
+    context_->functions()->glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+    context_->functions()->glClear(GL_COLOR_BUFFER_BIT);
+  }
+
+  // release framebuffer
+  f->glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+}