1 files changed, 217 insertions, 0 deletions

diff --git a/util/fbcompose/plugins/opengl/preview/PreviewPlugin.cc b/util/fbcompose/plugins/opengl/preview/PreviewPlugin.cc
new file mode 100644
index 0000000..97faf34
--- /dev/null
+++ b/util/fbcompose/plugins/opengl/preview/PreviewPlugin.cc
@@ -0,0 +1,217 @@
+/** PreviewPlugin.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 "PreviewPlugin.hh"
+
+#include "BaseScreen.hh"
+#include "Exceptions.hh"
+#include "OpenGLScreen.hh"
+#include "OpenGLWindow.hh"
+#include "Utility.hh"
+
+#include <algorithm>
+#include <iostream>
+
+using namespace FbCompositor;
+
+
+//--- SHADER SOURCES -----------------------------------------------------------
+
+/** Plugin's fragment shader source. */
+const GLchar FRAGMENT_SHADER[] = "\
+    void preview() { }                                                       \n\
+";
+
+/** Plugin's vertex shader source. */
+const GLchar VERTEX_SHADER[] = "\
+    void preview() { }                                                       \n\
+";
+
+
+//--- CONSTANTS ----------------------------------------------------------------
+
+/** Maximum height of the preview window. */
+const int MAX_PREVIEW_HEIGHT = 150;
+
+/** Maximum width of the preview window. */
+const int MAX_PREVIEW_WIDTH = 150;
+
+/** Transparency of the preview window. */
+const unsigned int PREVIEW_ALPHA = 200;
+
+/** Time in microseconds until the preview window is shown. */
+const int SLEEP_TIME = 500000;
+
+
+//--- CONSTRUCTORS AND DESTRUCTORS ---------------------------------------------
+
+// Constructor.
+PreviewPlugin::PreviewPlugin(const BaseScreen &screen, const std::vector<FbTk::FbString> &args) :
+    OpenGLPlugin(screen, args) {
+
+    m_tick_tracker.setTickSize(SLEEP_TIME);
+}
+
+// Destructor.
+PreviewPlugin::~PreviewPlugin() { }
+
+
+//--- ACCESSORS ----------------------------------------------------------------
+
+// Returns the additional source code for the fragment shader.
+const char *PreviewPlugin::fragmentShader() const {
+    return FRAGMENT_SHADER;
+}
+
+// Returns the additional source code for the vertex shader.
+const char *PreviewPlugin::vertexShader() const {
+    return VERTEX_SHADER;
+}
+
+
+//--- WINDOW EVENT CALLBACKS ---------------------------------------------------
+
+// Called, whenever a new window is created.
+void PreviewPlugin::windowCreated(const BaseCompWindow &window) {
+    const OpenGLWindow &gl_window = dynamic_cast<const OpenGLWindow&>(window);
+
+    OpenGLRenderingJob job;
+    job.prim_pos_buffer = new OpenGLBuffer(openGLScreen(), GL_ARRAY_BUFFER);
+    job.main_tex_coord_buffer = openGLScreen().defaultTexCoordBuffer();
+    job.shape_tex_coord_buffer = openGLScreen().defaultTexCoordBuffer();
+    job.alpha = PREVIEW_ALPHA / 255.0f;
+    job.shader_init = new NullInitializer();
+    job.shader_deinit = new NullDeinitializer();
+
+    PreviewWindowData win_data = { gl_window, job };
+    m_preview_data.insert(std::make_pair(gl_window.window(), win_data));
+}
+
+/** Called, whenever a window is destroyed. */
+void PreviewPlugin::windowDestroyed(const BaseCompWindow &window) {
+    std::map<Window, PreviewWindowData>::iterator it = m_preview_data.find(window.window());
+    if (it != m_preview_data.end()) {
+        m_preview_data.erase(it);
+    }
+}
+
+
+//--- RENDERING ACTIONS --------------------------------------------------------
+
+/** Extra rendering actions and jobs. */
+const std::vector<OpenGLRenderingJob> &PreviewPlugin::extraRenderingActions() {
+    m_extra_jobs.clear();
+
+    std::map<Window, PreviewWindowData>::iterator it = m_preview_data.find(screen().currentIconbarItem());
+    if (it != m_preview_data.end()) {
+        PreviewWindowData &cur_preview = it->second;
+
+        if (!m_tick_tracker.isRunning()) {
+            m_tick_tracker.start();
+        }
+
+        if (cur_preview.window.partitionCount() > 0) {
+            updatePreviewWindow(cur_preview);
+            if (m_tick_tracker.totalElapsedTicks() > 0) {
+                m_extra_jobs.push_back(cur_preview.job);
+            }
+        }
+    } else {
+        m_tick_tracker.stop();
+    }
+
+    return m_extra_jobs;
+}
+
+
+//--- INTERNAL FUNCTIONS -------------------------------------------------------
+
+// Update the preview window.
+// TODO: Place the preview window on the edge of the toolbar.
+// TODO: Left/Right toolbar orientations.
+// TODO: Use all window texture partitions.
+void PreviewPlugin::updatePreviewWindow(PreviewWindowData &win_preview) {
+    XRectangle thumb_dim;
+
+    // Find thumbnail's width and height.
+    int full_thumb_width = std::min<int>(win_preview.window.realWidth(), openGLScreen().maxTextureSize());
+    int full_thumb_height = std::min<int>(win_preview.window.realHeight(), openGLScreen().maxTextureSize());
+
+    double scale_factor = 1.0;
+    scale_factor = std::max(scale_factor, full_thumb_width / double(MAX_PREVIEW_WIDTH));
+    scale_factor = std::max(scale_factor, full_thumb_height / double(MAX_PREVIEW_HEIGHT));
+
+    thumb_dim.width = static_cast<int>(full_thumb_width / scale_factor);
+    thumb_dim.height = static_cast<int>(full_thumb_height / scale_factor);
+
+    // Find thumbnail's X and Y coordinates.
+    int mouse_pos_x, mouse_pos_y;
+    mousePointerLocation(screen(), mouse_pos_x, mouse_pos_y);
+
+    if (screen().heads().size() > 0) {
+        XRectangle cur_head = screen().heads()[0];
+
+        // First find which head the mouse pointer is on,
+        for (size_t i = 1; i < screen().heads().size(); i++) {
+            XRectangle head = screen().heads()[i];
+            if ((mouse_pos_x >= head.x) && (mouse_pos_y >= head.y)
+                    && (mouse_pos_x < (head.x + head.width))
+                    && (mouse_pos_y < (head.y + head.height))) {
+                cur_head = head;
+                break;
+            }
+        }
+
+        // then position the thumbnail there.
+        thumb_dim.x = mouse_pos_x - thumb_dim.width / 2;
+
+        int mid_head = cur_head.y + (cur_head.height / 2);
+        if (mouse_pos_y < mid_head) {
+            thumb_dim.y = mouse_pos_y + 10;
+        } else {
+            thumb_dim.y = mouse_pos_y - thumb_dim.height - 10;
+        }
+    } else {    // But WHAT IF we have no heads?
+        thumb_dim.x = mouse_pos_x - (thumb_dim.width / 2);
+        thumb_dim.y = mouse_pos_y + 10;
+    }
+
+    // Update job struct variables.
+    win_preview.job.prim_pos_buffer->bufferPosRectangle(screen().rootWindow().width(), screen().rootWindow().height(), thumb_dim);
+
+    win_preview.job.main_texture = win_preview.window.contentTexturePartition(0);
+    win_preview.job.shape_texture = win_preview.window.shapeTexturePartition(0);
+}
+
+
+//--- PLUGIN MANAGER FUNCTIONS -------------------------------------------------
+
+// Creates a plugin object.
+extern "C" BasePlugin *createPlugin(const BaseScreen &screen, const std::vector<FbTk::FbString> &args) {
+    return new PreviewPlugin(screen, args);
+}
+
+// Returns the type of the plugin.
+extern "C" FbCompositor::PluginType pluginType() {
+    return Plugin_OpenGL;
+}