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Performance Improvement: Use texture caching with xAxis tickmarks and text when usePixmapCache is on

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This commit is contained in:
Mark Watkins 2013-01-18 17:33:35 +10:00
parent 866b9151ab
commit e24cc56975
6 changed files with 219 additions and 167 deletions
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6
Graphs/gGraphView.cpp
View File

@ -1080,10 +1080,8 @@ gGraph::gGraph(gGraphView *graphview,QString title,QString units, int height,sho
m_selecting_area=m_blockzoom=false;
m_lastx23=0;
titleImage=QImage();
yAxisImage=QImage();
yAxisImageTex=titleImageTex=0;
invalidate_yAxisImage=true;
invalidate_xAxisImage=true;
m_quad=new gVertexBuffer(64,GL_QUADS);
m_quad->forceAntiAlias(true);
@ -1994,6 +1992,7 @@ QPixmap gGraph::renderPixmap(int w, int h, bool printing)
// Sets a new Min & Max X clipping, refreshing the graph and all it's layers.
void gGraph::SetXBounds(qint64 minx, qint64 maxx)
{
invalidate_xAxisImage=true;
min_x=minx;
max_x=maxx;
@ -2007,6 +2006,7 @@ int gGraph::flipY(int y)
void gGraph::ResetBounds()
{
invalidate_xAxisImage=true;
min_x=MinX();
max_x=MaxX();
min_y=MinY();

4
Graphs/gGraphView.h
View File

@ -730,12 +730,10 @@ public:
Layer * getLineChart();
QRect m_lastbounds;
QTimer * timer;
QImage titleImage,yAxisImage;
GLuint titleImageTex,yAxisImageTex;
// This gets set to true to force a redraw of the yAxis tickers when graphs are resized.
bool invalidate_yAxisImage;
bool invalidate_xAxisImage;
//! \brief Returns a Vector reference containing all this graphs layers
QVector<Layer *> & layers() { return m_layers; }

55
Graphs/gXAxis.cpp
View File

@ -29,6 +29,7 @@ gXAxis::gXAxis(QColor col,bool fadeout)
m_show_major_ticks=true;
m_utcfix=false;
m_fadeout=fadeout;
m_textureID=0;
// QDateTime d=QDateTime::currentDateTime();
// QTime t1=d.time();
// QTime t2=d.toUTC().time();
@ -46,6 +47,22 @@ gXAxis::~gXAxis()
void gXAxis::paint(gGraph & w,int left,int top, int width, int height)
{
Q_UNUSED(height)
QPainter painter; // Only need this for pixmap caching
bool usepixmap=w.graphView()->usePixmapCache(); // Whether or not to use pixmap caching
if (!usepixmap || (usepixmap && w.invalidate_xAxisImage)) {
if (usepixmap) {
// Unbind any previous texture
if (m_textureID) w.graphView()->deleteTexture(m_textureID);
m_pixmap=QPixmap(width+22,height+4);
m_pixmap.fill(Qt::transparent);
painter.begin(&m_pixmap);
painter.setPen(Qt::black);
}
double px,py;
int start_px=left;
@ -156,13 +173,20 @@ void gXAxis::paint(gGraph & w,int left,int top, int width, int height)
py=left+float(aligned_start-minx)*xmult;
//py+=usepixmap ? 20 : left;
int mintop=top+4.0*(float(y)/10.0);
int majtop=top+6.0*(float(y)/10.0);
int texttop=majtop+y; // 18*w.printScaleY();
// Fill in the minor tick marks up to the first major alignment tick
for (int i=0;i<num_minor_ticks;i++) {
py-=step_pixels;
if (py<start_px) continue;
if (usepixmap)
painter.drawLine(py-left+20,0,py-left+20,mintop-top);
else
lines->add(py,top,py,mintop);
}
//static QString dow[]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
@ -172,7 +196,9 @@ void gXAxis::paint(gGraph & w,int left,int top, int width, int height)
for (qint64 i=aligned_start;i<maxx;i+=step) {
px=(i-minx)*xmult;
px+=left;
lines->add(px,top,px,majtop);
if (usepixmap) {
painter.drawLine(px-left+20,0,px-left+20,majtop-top);
} else lines->add(px,top,px,majtop);
j=i;
if (!m_utcfix) j+=tz_offset;
ms=j % 1000;
@ -199,13 +225,17 @@ void gXAxis::paint(gGraph & w,int left,int top, int width, int height)
if (m_utcfix)
tx+=step_pixels/2.0;
if ((tx+x)<(left+width))
w.renderText(tmpstr,tx,texttop);
if ((tx+x)<(left+width)) {
if (!usepixmap) w.renderText(tmpstr,tx,texttop);
else painter.drawText(tx-left+20,texttop-top,tmpstr);
}
py=px;
for (int j=1;j<num_minor_ticks;j++) {
py+=step_pixels;
if (py>=left+width) break;
lines->add(py,top,py,mintop);
if (usepixmap) {
painter.drawLine(py-left+20,0,py-left+20,mintop-top);
} else lines->add(py,top,py,mintop);
}
if (lines->full()) {
@ -213,5 +243,22 @@ void gXAxis::paint(gGraph & w,int left,int top, int width, int height)
break;
}
}
if (usepixmap) {
painter.end();
m_textureID=w.graphView()->bindTexture(m_pixmap);
}
w.invalidate_xAxisImage=false;
}
if (usepixmap && !m_pixmap.isNull()) {
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_TEXTURE_2D);
w.graphView()->drawTexture(QPoint(left-20,(top+height)-m_pixmap.height()+4),m_textureID);
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
}
}

3
Graphs/gXAxis.h
View File

@ -43,5 +43,8 @@ class gXAxis:public Layer
bool m_fadeout;
qint64 tz_offset;
float tz_hours;
QPixmap m_pixmap;
GLuint m_textureID;
};
#endif // GXAXIS_H

25
Graphs/gYAxis.cpp
View File

@ -31,10 +31,10 @@ gXGrid::~gXGrid()
}
void gXGrid::paint(gGraph & w,int left,int top, int width, int height)
{
gVertexBuffer * stippled, * lines;
int x,y;
gVertexBuffer * stippled, * lines;
EventDataType miny=w.min_y;
EventDataType maxy=w.max_y;
@ -129,6 +129,7 @@ gYAxis::gYAxis(QColor col)
{
m_line_color=col;
m_text_color=col;
yAxisImageTex=0;
m_yaxis_scale=1;
}
@ -142,9 +143,9 @@ void gYAxis::paint(gGraph & w,int left,int top, int width, int height)
if (w.graphView()->usePixmapCache()) {
if (w.invalidate_yAxisImage) {
if (!w.yAxisImage.isNull()) {
w.graphView()->deleteTexture(w.yAxisImageTex);
w.yAxisImage=QImage();
if (!yAxisImage.isNull()) {
w.graphView()->deleteTexture(yAxisImageTex);
yAxisImage=QPixmap();
}
@ -167,10 +168,10 @@ void gYAxis::paint(gGraph & w,int left,int top, int width, int height)
GetTextExtent(fd,x,y);
yh=y;
QPixmap pixmap(width,height+y+4);
yAxisImage=QPixmap(width,height+y+4);
pixmap.fill(Qt::transparent);
QPainter paint(&pixmap);
yAxisImage.fill(Qt::transparent);
QPainter paint(&yAxisImage);
double max_yticks=round(height / (y+14.0)); // plus spacing between lines
@ -246,16 +247,16 @@ void gYAxis::paint(gGraph & w,int left,int top, int width, int height)
}
}
paint.end();
w.yAxisImage=QGLWidget::convertToGLFormat(pixmap.toImage().mirrored(false,true));
w.yAxisImageTex=w.graphView()->bindTexture(w.yAxisImage);
//yAxisImage=QGLWidget::convertToGLFormat(pixmap.toImage().mirrored(false,true));
yAxisImageTex=w.graphView()->bindTexture(yAxisImage);
w.invalidate_yAxisImage=false;
}
if (!w.yAxisImage.isNull()) {
if (!yAxisImage.isNull()) {
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_TEXTURE_2D);
w.graphView()->drawTexture(QPoint(left,(top+height)-w.yAxisImage.height()+5),w.yAxisImageTex);
w.graphView()->drawTexture(QPoint(left,(top+height)-yAxisImage.height()+5),yAxisImageTex);
glDisable(GL_TEXTURE_2D);
glDisable(GL_BLEND);
}

3
Graphs/gYAxis.h
View File

@ -112,6 +112,9 @@ class gYAxis:public Layer
gVertexBuffer * lines;
virtual bool mouseMoveEvent(QMouseEvent * event);
QPixmap yAxisImage;
GLuint yAxisImageTex;
};
/*! \class gYAxisTime