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kwin/effects/showfps/showfps.cpp
Martin Gräßlin 4230a0d331 [effects] Get xcb_connection_t* and rootWindow through EffectsHandler API 
So far the effects could just use the connection() and rootWindow()
provided by kwinglobals. Thus an internal detail from KWin core is
accessed directly.

To be more consistent with the rest of the API it's wrapped through the
EffectsHandler and with a convenient method in Effect.

The connection() is provided as xcbConnection() to free the very generic
name connection which could create confusion once we provide a wayland
connection to the Effects.

The rootWindow() is provided as x11RootWindow() to indicate that it is
for the X11 world.

REVIEW: 117597
2014-04-16 16:05:05 +02:00

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
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 2 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 "showfps.h"
// KConfigSkeleton
#include "showfpsconfig.h"
#include <kwinconfig.h>
#include <kwinglutils.h>
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
#include <kwinxrenderutils.h>
#include <xcb/render.h>
#endif
#include <KLocalizedString>
#include <math.h>
#include <QPainter>
#include <QVector2D>
namespace KWin
{
const int FPS_WIDTH = 10;
const int MAX_TIME = 100;
ShowFpsEffect::ShowFpsEffect()
: paints_pos(0)
, frames_pos(0)
, m_noBenchmark(effects->effectFrame(EffectFrameUnstyled, false))
{
for (int i = 0;
i < NUM_PAINTS;
++i) {
paints[ i ] = 0;
paint_size[ i ] = 0;
}
for (int i = 0;
i < MAX_FPS;
++i)
frames[ i ] = 0;
m_noBenchmark->setAlignment(Qt::AlignTop | Qt::AlignRight);
m_noBenchmark->setText(i18n("This effect is not a benchmark"));
reconfigure(ReconfigureAll);
}
void ShowFpsEffect::reconfigure(ReconfigureFlags)
{
ShowFpsConfig::self()->read();
alpha = ShowFpsConfig::alpha();
x = ShowFpsConfig::x();
y = ShowFpsConfig::y();
const QSize screenSize = effects->virtualScreenSize();
if (x == -10000) // there's no -0 :(
x = screenSize.width() - 2 * NUM_PAINTS - FPS_WIDTH;
else if (x < 0)
x = screenSize.width() - 2 * NUM_PAINTS - FPS_WIDTH - x;
if (y == -10000)
y = screenSize.height() - MAX_TIME;
else if (y < 0)
y = screenSize.height() - MAX_TIME - y;
fps_rect = QRect(x, y, FPS_WIDTH + 2 * NUM_PAINTS, MAX_TIME);
m_noBenchmark->setPosition(fps_rect.bottomRight() + QPoint(-6, 6));
int textPosition = ShowFpsConfig::textPosition();
textFont = ShowFpsConfig::textFont();
textColor = ShowFpsConfig::textColor();
double textAlpha = ShowFpsConfig::textAlpha();
if (!textColor.isValid())
textColor = QPalette().color(QPalette::Active, QPalette::WindowText);
textColor.setAlphaF(textAlpha);
switch(textPosition) {
case TOP_LEFT:
fpsTextRect = QRect(0, 0, 100, 100);
textAlign = Qt::AlignTop | Qt::AlignLeft;
break;
case TOP_RIGHT:
fpsTextRect = QRect(screenSize.width() - 100, 0, 100, 100);
textAlign = Qt::AlignTop | Qt::AlignRight;
break;
case BOTTOM_LEFT:
fpsTextRect = QRect(0, screenSize.height() - 100, 100, 100);
textAlign = Qt::AlignBottom | Qt::AlignLeft;
break;
case BOTTOM_RIGHT:
fpsTextRect = QRect(screenSize.width() - 100, screenSize.height() - 100, 100, 100);
textAlign = Qt::AlignBottom | Qt::AlignRight;
break;
case NOWHERE:
fpsTextRect = QRect();
break;
case INSIDE_GRAPH:
default:
fpsTextRect = QRect(x, y, FPS_WIDTH + NUM_PAINTS, MAX_TIME);
textAlign = Qt::AlignTop | Qt::AlignRight;
break;
}
}
void ShowFpsEffect::prePaintScreen(ScreenPrePaintData& data, int time)
{
if (time == 0) {
// TODO optimized away
}
t.start();
frames[ frames_pos ] = t.minute() * 60000 + t.second() * 1000 + t.msec();
if (++frames_pos == MAX_FPS)
frames_pos = 0;
effects->prePaintScreen(data, time);
data.paint += fps_rect;
paint_size[ paints_pos ] = 0;
}
void ShowFpsEffect::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
{
effects->paintWindow(w, mask, region, data);
// Take intersection of region and actual window's rect, minus the fps area
// (since we keep repainting it) and count the pixels.
QRegion r2 = region & QRect(w->x(), w->y(), w->width(), w->height());
r2 -= fps_rect;
int winsize = 0;
foreach (const QRect & r, r2.rects())
winsize += r.width() * r.height();
paint_size[ paints_pos ] += winsize;
}
void ShowFpsEffect::paintScreen(int mask, QRegion region, ScreenPaintData& data)
{
effects->paintScreen(mask, region, data);
int fps = 0;
for (int i = 0;
i < MAX_FPS;
++i)
if (abs(t.minute() * 60000 + t.second() * 1000 + t.msec() - frames[ i ]) < 1000)
++fps; // count all frames in the last second
if (fps > MAX_TIME)
fps = MAX_TIME; // keep it the same height
if (effects->isOpenGLCompositing()) {
paintGL(fps);
glFinish(); // make sure all rendering is done
}
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
if (effects->compositingType() == XRenderCompositing) {
paintXrender(fps);
xcb_flush(xcbConnection()); // make sure all rendering is done
}
#endif
if (effects->compositingType() == QPainterCompositing) {
paintQPainter(fps);
}
m_noBenchmark->render(infiniteRegion(), 1.0, alpha);
}
void ShowFpsEffect::paintGL(int fps)
{
int x = this->x;
int y = this->y;
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// TODO painting first the background white and then the contents
// means that the contents also blend with the background, I guess
ShaderBinder binder(ShaderManager::ColorShader);
GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
vbo->reset();
QColor color(255, 255, 255);
color.setAlphaF(alpha);
vbo->setColor(color);
QVector<float> verts;
verts.reserve(12);
verts << x + 2 * NUM_PAINTS + FPS_WIDTH << y;
verts << x << y;
verts << x << y + MAX_TIME;
verts << x << y + MAX_TIME;
verts << x + 2 * NUM_PAINTS + FPS_WIDTH << y + MAX_TIME;
verts << x + 2 * NUM_PAINTS + FPS_WIDTH << y;
vbo->setData(6, 2, verts.constData(), NULL);
vbo->render(GL_TRIANGLES);
y += MAX_TIME; // paint up from the bottom
color.setRed(0);
color.setGreen(0);
vbo->setColor(color);
verts.clear();
verts << x + FPS_WIDTH << y - fps;
verts << x << y - fps;
verts << x << y;
verts << x << y;
verts << x + FPS_WIDTH << y;
verts << x + FPS_WIDTH << y - fps;
vbo->setData(6, 2, verts.constData(), NULL);
vbo->render(GL_TRIANGLES);
color.setBlue(0);
vbo->setColor(color);
QVector<float> vertices;
for (int i = 10;
i < MAX_TIME;
i += 10) {
vertices << x << y - i;
vertices << x + FPS_WIDTH << y - i;
}
vbo->setData(vertices.size() / 2, 2, vertices.constData(), NULL);
vbo->render(GL_LINES);
x += FPS_WIDTH;
// Paint FPS graph
paintFPSGraph(x, y);
x += NUM_PAINTS;
// Paint amount of rendered pixels graph
paintDrawSizeGraph(x, y);
// Paint FPS numerical value
if (fpsTextRect.isValid()) {
fpsText.reset(new GLTexture(fpsTextImage(fps)));
fpsText->bind();
ShaderBinder binder(ShaderManager::SimpleShader);
if (effects->compositingType() == OpenGL2Compositing) {
binder.shader()->setUniform("offset", QVector2D(0, 0));
}
fpsText->render(QRegion(fpsTextRect), fpsTextRect);
fpsText->unbind();
effects->addRepaint(fpsTextRect);
}
// Paint paint sizes
glDisable(GL_BLEND);
}
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
/*
Differences between OpenGL and XRender:
- differently specified rectangles (X: width/height, O: x2,y2)
- XRender uses pre-multiplied alpha
*/
void ShowFpsEffect::paintXrender(int fps)
{
xcb_pixmap_t pixmap = xcb_generate_id(xcbConnection());
xcb_create_pixmap(xcbConnection(), 32, pixmap, x11RootWindow(), FPS_WIDTH, MAX_TIME);
XRenderPicture p(pixmap, 32);
xcb_free_pixmap(xcbConnection(), pixmap);
xcb_render_color_t col;
col.alpha = int(alpha * 0xffff);
col.red = int(alpha * 0xffff); // white
col.green = int(alpha * 0xffff);
col.blue = int(alpha * 0xffff);
xcb_rectangle_t rect = {0, 0, FPS_WIDTH, MAX_TIME};
xcb_render_fill_rectangles(xcbConnection(), XCB_RENDER_PICT_OP_SRC, p, col, 1, &rect);
col.red = 0; // blue
col.green = 0;
col.blue = int(alpha * 0xffff);
rect.y = MAX_TIME - fps;
rect.width = FPS_WIDTH;
rect.height = fps;
xcb_render_fill_rectangles(xcbConnection(), XCB_RENDER_PICT_OP_SRC, p, col, 1, &rect);
col.red = 0; // black
col.green = 0;
col.blue = 0;
QVector<xcb_rectangle_t> rects;
for (int i = 10;
i < MAX_TIME;
i += 10) {
xcb_rectangle_t rect = {0, int16_t(MAX_TIME - i), uint16_t(FPS_WIDTH), 1};
rects << rect;
}
xcb_render_fill_rectangles(xcbConnection(), XCB_RENDER_PICT_OP_SRC, p, col, rects.count(), rects.constData());
xcb_render_composite(xcbConnection(), alpha != 1.0 ? XCB_RENDER_PICT_OP_OVER : XCB_RENDER_PICT_OP_SRC, p, XCB_RENDER_PICTURE_NONE,
effects->xrenderBufferPicture(), 0, 0, 0, 0, x, y, FPS_WIDTH, MAX_TIME);
// Paint FPS graph
paintFPSGraph(x + FPS_WIDTH, y);
// Paint amount of rendered pixels graph
paintDrawSizeGraph(x + FPS_WIDTH + MAX_TIME, y);
// Paint FPS numerical value
if (fpsTextRect.isValid()) {
QImage textImg(fpsTextImage(fps));
XRenderPicture textPic(textImg);
xcb_render_composite(xcbConnection(), XCB_RENDER_PICT_OP_OVER, textPic, XCB_RENDER_PICTURE_NONE,
effects->xrenderBufferPicture(), 0, 0, 0, 0, fpsTextRect.x(), fpsTextRect.y(), textImg.width(), textImg.height());
effects->addRepaint(fpsTextRect);
}
}
#endif
void ShowFpsEffect::paintQPainter(int fps)
{
QPainter *painter = effects->scenePainter();
painter->save();
QColor color(255, 255, 255);
color.setAlphaF(alpha);
painter->setCompositionMode(QPainter::CompositionMode_SourceOver);
painter->fillRect(x, y, 2 * NUM_PAINTS + FPS_WIDTH, MAX_TIME, color);
color.setRed(0);
color.setGreen(0);
painter->fillRect(x, y + MAX_TIME - fps, FPS_WIDTH, fps, color);
color.setBlue(0);
for (int i = 10; i < MAX_TIME; i += 10) {
painter->setPen(color);
painter->drawLine(x, y + MAX_TIME - i, x + FPS_WIDTH, y + MAX_TIME - i);
}
// Paint FPS graph
paintFPSGraph(x + FPS_WIDTH, y + MAX_TIME - 1);
// Paint amount of rendered pixels graph
paintDrawSizeGraph(x + FPS_WIDTH + NUM_PAINTS, y + MAX_TIME - 1);
// Paint FPS numerical value
painter->setPen(Qt::black);
painter->drawText(fpsTextRect, textAlign, QString::number(fps));
painter->restore();
}
void ShowFpsEffect::paintFPSGraph(int x, int y)
{
// Paint FPS graph
QList<int> lines;
lines << 10 << 20 << 50;
QList<int> values;
for (int i = 0;
i < NUM_PAINTS;
++i) {
values.append(paints[(i + paints_pos) % NUM_PAINTS ]);
}
paintGraph(x, y, values, lines, true);
}
void ShowFpsEffect::paintDrawSizeGraph(int x, int y)
{
int max_drawsize = 0;
for (int i = 0; i < NUM_PAINTS; i++)
max_drawsize = qMax(max_drawsize, paint_size[ i ]);
// Log of min/max values shown on graph
const float max_pixels_log = 7.2f;
const float min_pixels_log = 2.0f;
const int minh = 5; // Minimum height of the bar when value > 0
float drawscale = (MAX_TIME - minh) / (max_pixels_log - min_pixels_log);
QList<int> drawlines;
for (int logh = (int)min_pixels_log; logh <= max_pixels_log; logh++)
drawlines.append((int)((logh - min_pixels_log) * drawscale) + minh);
QList<int> drawvalues;
for (int i = 0;
i < NUM_PAINTS;
++i) {
int value = paint_size[(i + paints_pos) % NUM_PAINTS ];
int h = 0;
if (value > 0) {
h = (int)((log10((double)value) - min_pixels_log) * drawscale);
h = qMin(qMax(0, h) + minh, MAX_TIME);
}
drawvalues.append(h);
}
paintGraph(x, y, drawvalues, drawlines, false);
}
void ShowFpsEffect::paintGraph(int x, int y, QList<int> values, QList<int> lines, bool colorize)
{
if (effects->isOpenGLCompositing()) {
QColor color(0, 0, 0);
color.setAlphaF(alpha);
GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
vbo->reset();
vbo->setColor(color);
QVector<float> verts;
// First draw the lines
foreach (int h, lines) {
verts << x << y - h;
verts << x + values.count() << y - h;
}
vbo->setData(verts.size() / 2, 2, verts.constData(), NULL);
vbo->render(GL_LINES);
// Then the graph values
int lastValue = 0;
verts.clear();
for (int i = 0; i < values.count(); i++) {
int value = values[ i ];
if (colorize && value != lastValue) {
if (!verts.isEmpty()) {
vbo->setData(verts.size() / 2, 2, verts.constData(), NULL);
vbo->render(GL_LINES);
}
verts.clear();
if (value <= 10) {
color = QColor(0, 255, 0);
} else if (value <= 20) {
color = QColor(255, 255, 0);
} else if (value <= 50) {
color = QColor(255, 0, 0);
} else {
color = QColor(0, 0, 0);
}
vbo->setColor(color);
}
verts << x + values.count() - i << y;
verts << x + values.count() - i << y - value;
lastValue = value;
}
if (!verts.isEmpty()) {
vbo->setData(verts.size() / 2, 2, verts.constData(), NULL);
vbo->render(GL_LINES);
}
}
#ifdef KWIN_HAVE_XRENDER_COMPOSITING
if (effects->compositingType() == XRenderCompositing) {
xcb_pixmap_t pixmap = xcb_generate_id(xcbConnection());
xcb_create_pixmap(xcbConnection(), 32, pixmap, x11RootWindow(), values.count(), MAX_TIME);
XRenderPicture p(pixmap, 32);
xcb_free_pixmap(xcbConnection(), pixmap);
xcb_render_color_t col;
col.alpha = int(alpha * 0xffff);
// Draw background
col.red = col.green = col.blue = int(alpha * 0xffff); // white
xcb_rectangle_t rect = {0, 0, uint16_t(values.count()), uint16_t(MAX_TIME)};
xcb_render_fill_rectangles(xcbConnection(), XCB_RENDER_PICT_OP_SRC, p, col, 1, &rect);
// Then the values
col.red = col.green = col.blue = int(alpha * 0x8000); // grey
for (int i = 0; i < values.count(); i++) {
int value = values[ i ];
if (colorize) {
if (value <= 10) {
// green
col.red = 0;
col.green = int(alpha * 0xffff);
col.blue = 0;
} else if (value <= 20) {
// yellow
col.red = int(alpha * 0xffff);
col.green = int(alpha * 0xffff);
col.blue = 0;
} else if (value <= 50) {
// red
col.red = int(alpha * 0xffff);
col.green = 0;
col.blue = 0;
} else {
// black
col.red = 0;
col.green = 0;
col.blue = 0;
}
}
xcb_rectangle_t rect = {int16_t(values.count() - i), int16_t(MAX_TIME - value), 1, uint16_t(value)};
xcb_render_fill_rectangles(xcbConnection(), XCB_RENDER_PICT_OP_SRC, p, col, 1, &rect);
}
// Then the lines
col.red = col.green = col.blue = 0; // black
QVector<xcb_rectangle_t> rects;
foreach (int h, lines) {
xcb_rectangle_t rect = {0, int16_t(MAX_TIME - h), uint16_t(values.count()), 1};
rects << rect;
}
xcb_render_fill_rectangles(xcbConnection(), XCB_RENDER_PICT_OP_SRC, p, col, rects.count(), rects.constData());
// Finally render the pixmap onto screen
xcb_render_composite(xcbConnection(), alpha != 1.0 ? XCB_RENDER_PICT_OP_OVER : XCB_RENDER_PICT_OP_SRC, p,
XCB_RENDER_PICTURE_NONE, effects->xrenderBufferPicture(), 0, 0, 0, 0, x, y, values.count(), MAX_TIME);
}
#endif
if (effects->compositingType() == QPainterCompositing) {
QPainter *painter = effects->scenePainter();
painter->setPen(Qt::black);
// First draw the lines
foreach (int h, lines) {
painter->drawLine(x, y - h, x + values.count(), y - h);
}
QColor color(0, 0, 0);
color.setAlphaF(alpha);
for (int i = 0; i < values.count(); i++) {
int value = values[ i ];
if (colorize) {
if (value <= 10) {
color = QColor(0, 255, 0);
} else if (value <= 20) {
color = QColor(255, 255, 0);
} else if (value <= 50) {
color = QColor(255, 0, 0);
} else {
color = QColor(0, 0, 0);
}
}
painter->setPen(color);
painter->drawLine(x + values.count() - i, y, x + values.count() - i, y - value);
}
}
}
void ShowFpsEffect::postPaintScreen()
{
effects->postPaintScreen();
paints[ paints_pos ] = t.elapsed();
if (++paints_pos == NUM_PAINTS)
paints_pos = 0;
effects->addRepaint(fps_rect);
}
QImage ShowFpsEffect::fpsTextImage(int fps)
{
QImage im(100, 100, QImage::Format_ARGB32);
im.fill(Qt::transparent);
QPainter painter(&im);
painter.setFont(textFont);
painter.setPen(textColor);
painter.drawText(QRect(0, 0, 100, 100), textAlign, QString::number(fps));
painter.end();
return im;
}
} // namespace
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