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gnome-system-monitor/gnome-system-monitor-graph-cpu.patch
Matthias Clasen 8dfb09e436 Reduce resource consumption when drawing graphs
2008-04-18 13:16:47 +00:00

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diff -up gnome-system-monitor-2.22.1/src/load-graph.cpp.graph-cpu gnome-system-monitor-2.22.1/src/load-graph.cpp
--- gnome-system-monitor-2.22.1/src/load-graph.cpp.graph-cpu 2008-04-18 09:09:18.000000000 -0400
+++ gnome-system-monitor-2.22.1/src/load-graph.cpp 2008-04-18 09:09:49.000000000 -0400
@@ -63,87 +63,84 @@ unsigned LoadGraph::num_bars() const
void draw_background(LoadGraph *g) {
double dash[2] = { 1.0, 2.0 };
cairo_t *cr;
- cairo_t* tmp_cr;
guint i;
unsigned num_bars;
char *caption;
cairo_text_extents_t extents;
-
num_bars = g->num_bars();
g->graph_dely = (g->draw_height - 15) / num_bars; /* round to int to avoid AA blur */
g->real_draw_height = g->graph_dely * num_bars;
g->graph_delx = (g->draw_width - 2.0 - g->rmargin - g->indent) / (LoadGraph::NUM_POINTS - 3);
g->graph_buffer_offset = (int) (1.5 * g->graph_delx) + FRAME_WIDTH ;
- cr = cairo_create (g->buffer);
- g->background_buffer = cairo_surface_create_similar (cairo_get_target (cr),
- CAIRO_CONTENT_COLOR_ALPHA,
- g->draw_width + (2*FRAME_WIDTH),
- g->draw_height + (2*FRAME_WIDTH)); // ** We need the whole area as we are now setting the background colour here
+ g->background = gdk_pixmap_new (GDK_DRAWABLE (g->disp->window),
+ g->disp->allocation.width,
+ g->disp->allocation.height,
+ -1);
+ cr = gdk_cairo_create (g->background);
- tmp_cr = cairo_create (g->background_buffer);
-
// set the background colour
GtkStyle *style = gtk_widget_get_style (ProcData::get_instance()->notebook);
- gdk_cairo_set_source_color (tmp_cr, &style->bg[GTK_STATE_NORMAL]);
- cairo_paint (tmp_cr);
+ gdk_cairo_set_source_color (cr, &style->bg[GTK_STATE_NORMAL]);
+ cairo_paint (cr);
/* draw frame */
- cairo_translate (tmp_cr, FRAME_WIDTH, FRAME_WIDTH);
+ cairo_translate (cr, FRAME_WIDTH, FRAME_WIDTH);
/* Draw background rectangle */
- cairo_set_source_rgb (tmp_cr, 1.0, 1.0, 1.0);
- cairo_rectangle (tmp_cr, g->rmargin + g->indent, 0,
+ cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+ cairo_rectangle (cr, g->rmargin + g->indent, 0,
g->draw_width - g->rmargin - g->indent, g->real_draw_height);
- cairo_fill(tmp_cr);
+ cairo_fill(cr);
- cairo_set_line_width (tmp_cr, 1.0);
- cairo_set_dash (tmp_cr, dash, 2, 0);
- cairo_set_font_size (tmp_cr, g->fontsize);
+ cairo_set_line_width (cr, 1.0);
+ cairo_set_dash (cr, dash, 2, 0);
+ cairo_set_font_size (cr, g->fontsize);
for (i = 0; i <= num_bars; ++i) {
double y;
if (i == 0)
- y = 0.5 + g->fontsize / 2.0;
+ y = 0.5 + g->fontsize / 2.0;
else if (i == num_bars)
- y = i * g->graph_dely + 0.5;
+ y = i * g->graph_dely + 0.5;
else
- y = i * g->graph_dely + g->fontsize / 2.0;
- gdk_cairo_set_source_color (tmp_cr, &style->fg[GTK_STATE_NORMAL]);
+ y = i * g->graph_dely + g->fontsize / 2.0;
+
+ gdk_cairo_set_source_color (cr, &style->fg[GTK_STATE_NORMAL]);
if (g->type == LOAD_GRAPH_NET) {
// operation orders matters so it's 0 if i == num_bars
unsigned rate = g->net.max - (i * g->net.max / num_bars);
const std::string caption(procman::format_rate(rate, g->net.max));
- cairo_text_extents (tmp_cr, caption.c_str(), &extents);
- cairo_move_to (tmp_cr, g->indent - extents.width + 20, y);
- cairo_show_text (tmp_cr, caption.c_str());
+ cairo_text_extents (cr, caption.c_str(), &extents);
+ cairo_move_to (cr, g->indent - extents.width + 20, y);
+ cairo_show_text (cr, caption.c_str());
} else {
// operation orders matters so it's 0 if i == num_bars
caption = g_strdup_printf("%d %%", 100 - i * (100 / num_bars));
- cairo_text_extents (tmp_cr, caption, &extents);
- cairo_move_to (tmp_cr, g->indent - extents.width + 20, y);
- cairo_show_text (tmp_cr, caption);
+ cairo_text_extents (cr, caption, &extents);
+ cairo_move_to (cr, g->indent - extents.width + 20, y);
+ cairo_show_text (cr, caption);
g_free (caption);
}
- cairo_set_source_rgba (tmp_cr, 0, 0, 0, 0.75);
- cairo_move_to (tmp_cr, g->rmargin + g->indent - 3, i * g->graph_dely + 0.5);
- cairo_line_to (tmp_cr, g->draw_width - 0.5, i * g->graph_dely + 0.5);
+ cairo_set_source_rgba (cr, 0, 0, 0, 0.75);
+ cairo_move_to (cr, g->rmargin + g->indent - 3, i * g->graph_dely + 0.5);
+ cairo_line_to (cr, g->draw_width - 0.5, i * g->graph_dely + 0.5);
}
- cairo_stroke (tmp_cr);
+ cairo_stroke (cr);
- cairo_set_dash (tmp_cr, dash, 2, 1.5);
+ cairo_set_dash (cr, dash, 2, 1.5);
const unsigned total_seconds = g->speed * (LoadGraph::NUM_POINTS - 2) / 1000;
for (unsigned int i = 0; i < 7; i++) {
double x = (i) * (g->draw_width - g->rmargin - g->indent) / 6;
- cairo_set_source_rgba (tmp_cr, 0, 0, 0, 0.75);
- cairo_move_to (tmp_cr, (ceil(x) + 0.5) + g->rmargin + g->indent, 0.5);
- cairo_line_to (tmp_cr, (ceil(x) + 0.5) + g->rmargin + g->indent, g->real_draw_height + 4.5);
- cairo_stroke(tmp_cr);
+ cairo_set_source_rgba (cr, 0, 0, 0, 0.75);
+ cairo_move_to (cr, (ceil(x) + 0.5) + g->rmargin + g->indent, 0.5);
+ cairo_line_to (cr, (ceil(x) + 0.5) + g->rmargin + g->indent, g->real_draw_height + 4.5);
+ cairo_stroke(cr);
unsigned seconds = total_seconds - i * total_seconds / 6;
const char* format;
if (i == 0)
@@ -151,89 +148,26 @@ void draw_background(LoadGraph *g) {
else
format = "%u";
caption = g_strdup_printf(format, seconds);
- cairo_text_extents (tmp_cr, caption, &extents);
- cairo_move_to (tmp_cr, ((ceil(x) + 0.5) + g->rmargin + g->indent) - (extents.width/2), g->draw_height);
- gdk_cairo_set_source_color (tmp_cr, &style->fg[GTK_STATE_NORMAL]);
- cairo_show_text (tmp_cr, caption);
+ cairo_text_extents (cr, caption, &extents);
+ cairo_move_to (cr, ((ceil(x) + 0.5) + g->rmargin + g->indent) - (extents.width/2), g->draw_height);
+ gdk_cairo_set_source_color (cr, &style->fg[GTK_STATE_NORMAL]);
+ cairo_show_text (cr, caption);
g_free (caption);
}
- cairo_stroke (tmp_cr);
- cairo_destroy (tmp_cr);
- cairo_destroy (cr);
+ cairo_stroke (cr);
+ cairo_destroy (cr);
}
/* Redraws the backing buffer for the load graph and updates the window */
void
load_graph_draw (LoadGraph *g)
{
- cairo_t *cr;
- guint i, j;
- gdouble tmp;
-
- cr = cairo_create (g->buffer);
-
- /* draw the graph */
- if ((g->render_counter == 0)) {
- cairo_surface_destroy(g->graph_buffer);
- cairo_t* tmp_cr;
-
- g->graph_buffer = cairo_surface_create_similar (cairo_get_target (cr),
- CAIRO_CONTENT_COLOR_ALPHA,
- g->draw_width,
- g->draw_height);
- tmp_cr = cairo_create (g->graph_buffer);
-
- cairo_set_line_width (tmp_cr, 1.5);
- cairo_set_line_cap (tmp_cr, CAIRO_LINE_CAP_ROUND);
- cairo_set_line_join (tmp_cr, CAIRO_LINE_JOIN_ROUND);
-
- for (j = 0; j < g->n; ++j) {
- cairo_move_to (tmp_cr,
- g->draw_width - 2.0,
- (1.0f - g->data[0][j]) * g->real_draw_height);
- gdk_cairo_set_source_color (tmp_cr, &(g->colors [j]));
-
- for (i = 1; i < LoadGraph::NUM_POINTS; ++i) {
- if (g->data[i][j] == -1.0f)
- continue;
-
- cairo_curve_to (tmp_cr,
- (g->draw_width - (i-1) * g->graph_delx) - (g->graph_delx/2),
- (1.0f - g->data[i-1][j]) * g->real_draw_height,
- (g->draw_width - i * g->graph_delx) + (g->graph_delx/2),
- (1.0f - g->data[i][j]) * g->real_draw_height,
- g->draw_width - i * g->graph_delx,
- (1.0f - g->data[i][j]) * g->real_draw_height);
- }
-
- cairo_stroke (tmp_cr);
-
- }
- cairo_destroy (tmp_cr);
- }
-
- /* Composite and clip the surfaces together */
- if (g->background_buffer == NULL) {
- draw_background(g);
- }
- cairo_set_source_surface (cr, g->background_buffer, 0, 0);
- cairo_paint (cr);
-
- tmp = (float)(g->draw_width - g->rmargin - g->indent) / (float)LoadGraph::NUM_POINTS;
- tmp = tmp / g->frames_per_unit;
- tmp = tmp * g->render_counter;
- cairo_set_source_surface (cr, g->graph_buffer, g->graph_buffer_offset - tmp, FRAME_WIDTH);
- cairo_rectangle (cr, g->rmargin + g->indent + FRAME_WIDTH + 1, FRAME_WIDTH - 1,
- g->draw_width - g->rmargin - g->indent - 1 , g->real_draw_height + FRAME_WIDTH - 1);
- cairo_fill (cr);
- cairo_destroy (cr);
-
/* repaint */
gtk_widget_queue_draw (g->disp);
}
-static int load_graph_update (gpointer user_data); // predeclare load_graph_update so we can compile ;)
+static int load_graph_update (gpointer user_data); // predeclare load_graph_update so we can compile ;)
static gboolean
load_graph_configure (GtkWidget *widget,
@@ -241,37 +175,16 @@ load_graph_configure (GtkWidget *widget,
gpointer data_ptr)
{
LoadGraph * const g = static_cast<LoadGraph*>(data_ptr);
- cairo_t *cr;
-
g->draw_width = widget->allocation.width - 2 * FRAME_WIDTH;
g->draw_height = widget->allocation.height - 2 * FRAME_WIDTH;
- // FIXME:
- // g->frames_per_unit = g->draw_width/(LoadGraph::NUM_POINTS);
- // knock FRAMES down to 5 until cairo gets faster
-
- if(g->timer_index) {
- g_source_remove (g->timer_index);
- g->timer_index = g_timeout_add (g->speed / g->frames_per_unit,
- load_graph_update,
- g);
+ if (g->background) {
+ g_object_unref (g->background);
+ g->background = NULL;
}
- cr = gdk_cairo_create (widget->window);
-
- if (g->buffer)
- cairo_surface_destroy (g->buffer);
-
- g->buffer = cairo_surface_create_similar (cairo_get_target (cr),
- CAIRO_CONTENT_COLOR,
- widget->allocation.width,
- widget->allocation.height);
-
- cairo_destroy (cr);
-
- if (g->background_buffer != NULL) {
- cairo_surface_destroy(g->background_buffer);
- g->background_buffer = NULL;
+ if (g->gc == NULL) {
+ g->gc = gdk_gc_new (GDK_DRAWABLE (widget->window));
}
load_graph_draw (g);
@@ -285,13 +198,60 @@ load_graph_expose (GtkWidget *widget,
gpointer data_ptr)
{
LoadGraph * const g = static_cast<LoadGraph*>(data_ptr);
- cairo_t *cr;
- cr = gdk_cairo_create(widget->window);
+ guint i, j;
+ gdouble tmp, x_offset;
+
+ if (g->background == NULL) {
+ draw_background(g);
+ }
+ gdk_draw_drawable (g->disp->window,
+ g->gc,
+ g->background,
+ 0, 0, 0, 0,
+ g->disp->allocation.width,
+ g->disp->allocation.height);
+
+ tmp = (float)(g->draw_width - g->rmargin - g->indent) / (float)LoadGraph::NUM_POINTS;
+ tmp = tmp / g->frames_per_unit;
+ tmp = tmp * (g->render_counter + 1);
+
+ /* draw the graph */
+ cairo_t* cr;
+
+ cr = gdk_cairo_create (g->disp->window);
+
+ cairo_set_line_width (cr, 1);
+ cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
+ cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
+ cairo_rectangle (cr, g->rmargin + g->indent + FRAME_WIDTH + 1, FRAME_WIDTH - 1,
+ g->draw_width - g->rmargin - g->indent - 1 , g->real_draw_height + FRAME_WIDTH - 1);
+ cairo_clip(cr);
+
+ x_offset = g->rmargin - tmp;
- cairo_set_source_surface(cr, g->buffer, 0, 0);
- cairo_paint(cr);
- cairo_destroy(cr);
+ for (j = 0; j < g->n; ++j) {
+ cairo_move_to (cr,
+ x_offset + g->draw_width - 2.0,
+ (1.0f - g->data[0][j]) * g->real_draw_height);
+ gdk_cairo_set_source_color (cr, &(g->colors [j]));
+
+ for (i = 1; i < LoadGraph::NUM_POINTS; ++i) {
+ if (g->data[i][j] == -1.0f)
+ continue;
+ cairo_curve_to (cr,
+ x_offset + (g->draw_width - (i-1) * g->graph_delx) - (g->graph_delx/2),
+ (1.0f - g->data[i-1][j]) * g->real_draw_height+3.5,
+ x_offset + (g->draw_width - i * g->graph_delx) + (g->graph_delx/2),
+ (1.0f - g->data[i][j]) * g->real_draw_height+3.5,
+ x_offset + g->draw_width - i * g->graph_delx,
+ (1.0f - g->data[i][j]) * g->real_draw_height+3.5);
+ }
+ cairo_stroke (cr);
+
+ }
+
+ cairo_destroy (cr);
return TRUE;
}
@@ -478,12 +438,6 @@ net_scale (LoadGraph *g, unsigned din, u
procman_debug("dmax = %u max = %u new_max = %u", dmax, g->net.max, new_max);
g->net.max = new_max;
-
- // force the graph background to be redrawn now that scale has changed
- if (g->background_buffer != NULL) {
- cairo_surface_destroy(g->background_buffer);
- g->background_buffer = NULL;
- }
}
static void
@@ -559,7 +513,7 @@ load_graph_update (gpointer user_data)
{
LoadGraph * const g = static_cast<LoadGraph*>(user_data);
- if (g->render_counter == 0) {
+ if (g->render_counter == 4) {
std::rotate(&g->data[0], &g->data[LoadGraph::NUM_POINTS - 1], &g->data[LoadGraph::NUM_POINTS]);
switch (g->type) {
@@ -597,10 +551,8 @@ LoadGraph::~LoadGraph()
if (this->timer_index)
g_source_remove(this->timer_index);
- if (this->buffer) {
- cairo_surface_destroy(this->buffer);
- this->buffer = NULL;
- }
+ if (this->background)
+ g_object_unref (this->background);
}
@@ -633,9 +585,8 @@ LoadGraph::LoadGraph(guint type)
graph_buffer_offset(0),
main_widget(NULL),
disp(NULL),
- buffer(NULL),
- graph_buffer(NULL),
- background_buffer(NULL),
+ gc(NULL),
+ background(NULL),
timer_index(0),
draw(FALSE),
mem_color_picker(NULL),
@@ -643,6 +594,9 @@ LoadGraph::LoadGraph(guint type)
{
LoadGraph * const g = this;
+ // FIXME:
+ // on configure, g->frames_per_unit = g->draw_width/(LoadGraph::NUM_POINTS);
+ // knock FRAMES down to 5 until cairo gets faster
g->frames_per_unit = 5; // this will be changed but needs initialising
g->fontsize = 8.0;
g->rmargin = 3.5 * g->fontsize;
@@ -700,9 +654,7 @@ LoadGraph::LoadGraph(guint type)
}
g->timer_index = 0;
- g->render_counter = g->frames_per_unit;
- g->background_buffer = NULL;
- g->graph_buffer = NULL;
+ g->render_counter = (g->frames_per_unit - 1);
g->draw = FALSE;
g->main_widget = gtk_vbox_new (FALSE, FALSE);
@@ -730,10 +682,6 @@ LoadGraph::LoadGraph(guint type)
g->data[i] = &g->data_block[0] + i * g->n;
gtk_widget_show_all (g->main_widget);
-
- load_graph_start(g);
- load_graph_stop(g);
-
}
void
@@ -767,17 +715,9 @@ load_graph_change_speed (LoadGraph *g,
g->speed = new_speed;
- g_assert(g->timer_index);
-
- if(g->timer_index) {
- g_source_remove (g->timer_index);
- g->timer_index = g_timeout_add (g->speed / g->frames_per_unit,
- load_graph_update,
- g);
- }
- if (g->background_buffer != NULL) {
- cairo_surface_destroy(g->background_buffer);
- g->background_buffer = NULL;
+ if (g->background != NULL) {
+ g_object_unref(g->background);
+ g->background = NULL;
}
}
diff -up gnome-system-monitor-2.22.1/src/load-graph.h.graph-cpu gnome-system-monitor-2.22.1/src/load-graph.h
--- gnome-system-monitor-2.22.1/src/load-graph.h.graph-cpu 2008-04-18 09:09:47.000000000 -0400
+++ gnome-system-monitor-2.22.1/src/load-graph.h 2008-04-18 09:09:49.000000000 -0400
@@ -65,9 +65,8 @@ struct LoadGraph {
GtkWidget *main_widget;
GtkWidget *disp;
- cairo_surface_t *buffer;
- cairo_surface_t *graph_buffer;
- cairo_surface_t *background_buffer;
+ GdkGC *gc;
+ GdkDrawable *background;
guint timer_index;
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