From 01a1b297f1dc19c53d0d9777eea7c226ca0daddb Mon Sep 17 00:00:00 2001
From: Frederic Plourde<[email protected]>
Date: Mon, 3 Oct 2011 14:40:25 -0400
Subject: [PATCH gles] Add FBO capabilities to the opengl plugin.
This patch adds a simple GLFbo class in the opengl plugin source directory.
It is mostly copy&paste from the nux FBO implementation, but does not
include the ::paint().
Also, at the moment, the class only suppors one color attachment.
---
plugins/opengl/include/opengl/fbo.h | 70 +++++++++++++++
plugins/opengl/src/fbo.cpp | 164
+++++++++++++++++++++++++++++++++++
2 files changed, 234 insertions(+), 0 deletions(-)
diff --git a/plugins/opengl/include/opengl/fbo.h
b/plugins/opengl/include/opengl/fbo.h
new file mode 100644
index 0000000..b1e4097
--- /dev/null
+++ b/plugins/opengl/include/opengl/fbo.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2010-11 Canonical Ltd.
+ * Copyright (c) 2011 Collabora Ltd.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation, and that the names of
+ * Collabora Ltd. not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior permission.
+ * Collabora Ltd. makes no representations about the suitability of this
+ * software for any purpose. It is provided "as is" without express or
+ * implied warranty.
+ *
+ * COLLABORA LTD. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
+ * NO EVENT SHALL COLLABORA LTD. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+ * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+ * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Let's use this GLFbo class until we've got all the nux opengl stuff
+ * available in a separate lib.
+ */
+
+#ifndef _GLFbo_H
+#define _GLFbo_H
+
+#ifdef USE_GLES
+#include<GLES2/gl2.h>
+#else
+#include<GL/gl.h>
+#endif
+
+#include<core/core.h>
+#include<opengl/opengl.h>
+#include<opengl/matrix.h>
+
+class GLFbo
+{
+public:
+
+ GLFbo (CompOutput *o, GLTexture* texPtr);
+ ~GLFbo ();
+
+public:
+
+
+static void checkError(const char* label, bool fetch = true);
+
+ void bind ();
+ void unbind ();
+
+ bool status ();
+ bool bound ();
+
+ GLuint getTexID () { return texture->name (); }
+
+private:
+
+ GLuint mFboHandle; // actual handle to the framebuffer_ext
+ bool mFboStatus; // did the framebuffer texture bind succeed
+ GLTexture* texture;
+ CompOutput *output;
+ unsigned int mBoundCnt;
+};
+
+#endif
diff --git a/plugins/opengl/src/fbo.cpp b/plugins/opengl/src/fbo.cpp
new file mode 100644
index 0000000..3fd7c01
--- /dev/null
+++ b/plugins/opengl/src/fbo.cpp
@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 2010-11 Canonical Ltd.
+ * Copyright (c) 2006 Collabora, ltd.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation, and that the name of
+ * Collabora, Inc. not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior permission.
+ * Collabora, Inc. makes no representations about the suitability of this
+ * software for any purpose. It is provided "as is" without express or
+ * implied warranty.
+ *
+ * COLLABORA, LTD. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
+ * NO EVENT SHALL COLLABORA, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+ * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+ * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Let's use this GLFbo class until we've got all the nux opengl stuff
+ * available in a separate lib.
+ */
+
+#include<opengl/fbo.h>
+#include "privates.h"
+
+void
+GLFbo::checkError(const char* label, bool fetch)
+{
+ GLenum err = glGetError ();
+
+ printf ("%s :\n", label);
+ if (fetch)
+ {
+ if (err != GL_NO_ERROR)
+ {
+ switch (err)
+ {
+ case GL_INVALID_ENUM:
+ compLogMessage ("fbo", CompLogLevelWarn, "invalid enum");
+ break;
+ case GL_INVALID_VALUE:
+ compLogMessage ("fbo", CompLogLevelWarn, "invalid value");
+ break;
+ case GL_INVALID_OPERATION:
+ compLogMessage ("fbo", CompLogLevelWarn, "invalid operation");
+ break;
+ case GL_INVALID_FRAMEBUFFER_OPERATION:
+ compLogMessage ("fbo", CompLogLevelWarn, "invalid
framebuffer operation");
+ break;
+ case GL_OUT_OF_MEMORY:
+ compLogMessage ("fbo", CompLogLevelWarn, "out of memory");
+ break;
+ default:
+ compLogMessage ("fbo", CompLogLevelWarn, "Unknown GL error !");
+ break;
+ }
+ }
+ }
+}
+
+bool
+GLFbo::bound ()
+{
+ return mBoundCnt> 0;
+}
+
+bool
+GLFbo::status ()
+{
+ return mFboStatus;
+}
+
+void
+GLFbo::bind ()
+{
+ if (mBoundCnt)
+ {
+ mBoundCnt++;
+ return;
+ }
+
+ (*GL::bindFramebuffer) (GL_FRAMEBUFFER, mFboHandle);
+ (*GL::framebufferTexture2D) (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ GL_TEXTURE_2D, texture->name (), 0);
+
+ /* Ensure that a framebuffer is actually available */
+ if (!mFboStatus)
+ {
+ GLint status = (*GL::checkFramebufferStatus) (GL_FRAMEBUFFER);
+
+ if (status != GL_FRAMEBUFFER_COMPLETE)
+ {
+ switch (status)
+ {
+ case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
+ compLogMessage ("fbo", CompLogLevelWarn, "attachment
incomplete");
+ break;
+ case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
+ compLogMessage ("fbo", CompLogLevelWarn, "dimensions
incomplete");
+ break;
+ case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
+ compLogMessage ("fbo", CompLogLevelWarn, "no buffers
attached to fbo");
+ break;
+ case GL_FRAMEBUFFER_UNSUPPORTED:
+ compLogMessage ("fbo", CompLogLevelWarn, "unsupported
internal format");
+ break;
+ default:
+ compLogMessage ("fbo", CompLogLevelWarn, "unable to bind
the framebuffer for an unknown reason");
+ break;
+ }
+
+ GL::bindFramebuffer (GL_FRAMEBUFFER, 0);
+ GL::deleteFramebuffers (1,&mFboHandle);
+
+ mFboHandle = 0;
+ mFboStatus = false;
+ }
+ else
+ mFboStatus = true;
+ }
+
+ if (mFboStatus)
+ {
+ glViewport (0,
+ 0,
+ output->width(),
+ output->height());
+
+ mBoundCnt++;
+ }
+}
+
+void
+GLFbo::unbind ()
+{
+ mBoundCnt--;
+
+ if (mBoundCnt)
+ return;
+
+ (*GL::framebufferTexture2D) (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ GL_TEXTURE_2D, 0, 0);
+ (*GL::bindFramebuffer) (GL_FRAMEBUFFER, 0);
+}
+
+GLFbo::GLFbo (CompOutput *o, GLTexture* texPtr)
+ : mFboStatus (false)
+ , texture (texPtr)
+ , output (o)
+ , mBoundCnt (0)
+{
+ (*GL::genFramebuffers) (1,&mFboHandle);
+}
+
+GLFbo::~GLFbo ()
+{
+ (*GL::deleteFramebuffers) (1,&mFboHandle);
+ GLTexture::decRef (texture);
+}
--
1.7.4.1
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