fbcompose - A compositing addon for fluxbox window manager.

 fbcompose(1) is an optional compositing addon for fluxbox window manager. It
 augments fluxbox with a number of graphical features. Most notably, fbcompose
 allows fluxbox to properly display applications that require compositing
 (docky, for example), adds support for true window transparency (as opposed to
 fluxbox's pseudo transparency) and provides a plugin framework to extend the
 compositor's functionality.

 As this is still a beta version of the compositor, the bugs are likely.

1 files changed, 177 insertions, 0 deletions

diff --git a/util/fbcompose/OpenGLResources.cc b/util/fbcompose/OpenGLResources.cc
new file mode 100644
index 0000000..9558e45
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+++ b/util/fbcompose/OpenGLResources.cc
@@ -0,0 +1,177 @@
+/** OpenGLResources.cc file for the fluxbox compositor. */
+
+// Copyright (c) 2011 Gediminas Liktaras (gliktaras at gmail dot com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+
+#include "OpenGLResources.hh"
+
+#include "Logging.hh"
+#include "OpenGLScreen.hh"
+#include "OpenGLUtility.hh"
+#include "Utility.hh"
+
+using namespace FbCompositor;
+
+
+//--- CONSTANTS ----------------------------------------------------------------
+
+// Attributes of the textures' GLX pixmaps.
+const int TEX_PIXMAP_ATTRIBUTES[] = {
+#ifdef GLXEW_EXT_texture_from_pixmap
+    GLX_TEXTURE_TARGET_EXT, GLX_TEXTURE_2D_EXT,
+    GLX_TEXTURE_FORMAT_EXT, GLX_TEXTURE_FORMAT_RGBA_EXT,
+    None
+#else
+    None
+#endif  // GLXEW_EXT_texture_from_pixmap
+};
+
+
+//--- OPENGL BUFFER WRAPPER ----------------------------------------------------
+
+//------- CONSTRUCTORS AND DESTRUCTORS -----------------------------------------
+
+// Constructor.
+OpenGLBuffer::OpenGLBuffer(const OpenGLScreen &screen, GLenum target_buffer) :
+    m_screen(screen) {
+
+    m_target = target_buffer;
+
+    glGenBuffers(1, &m_buffer);
+}
+
+// Destructor.
+OpenGLBuffer::~OpenGLBuffer() {
+    glDeleteBuffers(1, &m_buffer);
+}
+
+
+//------- MUTATORS -------------------------------------------------------------
+
+// Sets the buffer's contents to be the rectangle's coordinates on the screen.
+void OpenGLBuffer::bufferPosRectangle(int screen_width, int screen_height, XRectangle rect) {
+    static GLfloat x_low, x_high, y_low, y_high;
+    static GLfloat temp_pos_array[8];
+
+    toOpenGLCoords(screen_width, screen_height, rect, &x_low, &x_high, &y_low, &y_high);
+
+    temp_pos_array[0] = temp_pos_array[4] = x_low;
+    temp_pos_array[2] = temp_pos_array[6] = x_high;
+    temp_pos_array[1] = temp_pos_array[3] = y_low;
+    temp_pos_array[5] = temp_pos_array[7] = y_high;
+    
+    bufferData(sizeof(temp_pos_array), (const GLvoid*)(temp_pos_array), GL_STATIC_DRAW);
+}
+
+
+//--- OPENGL TEXTURE WRAPPER ---------------------------------------------------
+
+//------- CONSTRUCTORS AND DESTRUCTORS -----------------------------------------
+
+// Constructor.
+OpenGL2DTexture::OpenGL2DTexture(const OpenGLScreen &screen, bool swizzle_alpha_to_one) :
+    m_screen(screen) {
+
+    m_display = (Display*)(screen.display());
+    m_glx_pixmap = 0;
+    m_pixmap = None;
+    m_pixmap_managed = false;
+
+    glGenTextures(1, &m_texture);
+    bind();
+
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+    if (swizzle_alpha_to_one) {
+#ifdef GL_ARB_texture_swizzle
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A, GL_ONE);
+#else
+#ifdef GL_EXT_texture_swizzle
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_A_EXT, GL_ONE);
+#endif  // GL_EXT_texture_swizzle
+#endif  // GL_ARB_texture_swizzle
+    }
+}
+
+// Destructor.
+OpenGL2DTexture::~OpenGL2DTexture() {
+    glDeleteTextures(1, &m_texture);
+
+    if (m_glx_pixmap) {
+        glXDestroyPixmap(m_display, m_glx_pixmap);
+    }
+    if (m_pixmap_managed && m_pixmap) {
+        XFreePixmap(m_display, m_pixmap);
+    }
+}
+
+
+//------- MUTATORS -------------------------------------------------------------
+
+// Sets the texture's contents to the given pixmap.
+void OpenGL2DTexture::setPixmap(Pixmap pixmap, bool manage_pixmap, int width, int height, bool force_direct) {
+    bind();
+
+    if (m_pixmap != pixmap) {
+#ifdef GLXEW_EXT_texture_from_pixmap
+        if (m_glx_pixmap) {
+            glXReleaseTexImageEXT(m_display, m_glx_pixmap, GLX_BACK_LEFT_EXT);
+            glXDestroyPixmap(m_display, m_glx_pixmap);
+            m_glx_pixmap = 0;
+        }
+#endif  // GLXEW_EXT_texture_from_pixmap
+
+        if (m_pixmap_managed && m_pixmap) {
+            XFreePixmap(m_display, m_pixmap);
+            m_pixmap = None;
+        }
+    }
+
+    m_height = height;
+    m_pixmap_managed = manage_pixmap;
+    m_pixmap = pixmap;
+    m_width = width;
+
+#ifdef GLXEW_EXT_texture_from_pixmap
+    if (!force_direct) {
+        if (!m_glx_pixmap) {
+            m_glx_pixmap = glXCreatePixmap(m_display, m_screen.fbConfig(), m_pixmap, TEX_PIXMAP_ATTRIBUTES);
+            glXBindTexImageEXT(m_display, m_glx_pixmap, GLX_BACK_LEFT_EXT, NULL);
+        }
+    } else 
+#else
+    MARK_PARAMETER_UNUSED(force_direct);
+#endif  // GLXEW_EXT_texture_from_pixmap
+
+    {
+        XImage *image = XGetImage(m_display, pixmap, 0, 0, width, height, AllPlanes, ZPixmap);
+        if (!image) {
+            fbLog_info << "Could not create XImage for pixmap to texture conversion." << std::endl;
+            return;
+        }
+
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_BGRA, GL_UNSIGNED_BYTE, (void*)(&(image->data[0])));
+        XDestroyImage(image);
+    }
+}