/*
- Copyright (C) 2000-2002 Paul Davis
+ Copyright (C) 2000-2002 Paul Davis
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
#include <stdio.h>
#include <math.h>
#include <libgnomecanvas/libgnomecanvas.h>
+#include <cairo.h>
#include <string.h>
#include <limits.h>
+#include <unistd.h>
-#include <ardour/dB.h>
+#include "ardour/dB.h"
+#include "logmeter.h"
#include "canvas-waveview.h"
#include "rgb_macros.h"
-extern void c_stacktrace();
+/* POSIX guarantees casting between void* and function pointers, ISO C doesn't
+ * We can work around warnings by going one step deeper in our casts
+ */
+#if defined(_POSIX_VERSION) || defined(COMPILER_MINGW)
+#define POSIX_FUNC_PTR_CAST(type, object) *((type*) &(object))
+#endif // _POSIX_VERSION
+
+extern void c_stacktrace(void);
enum {
PROP_0,
PROP_Y,
PROP_HEIGHT,
PROP_WAVE_COLOR,
+ PROP_CLIP_COLOR,
+ PROP_ZERO_COLOR,
+ PROP_FILL_COLOR,
+ PROP_FILLED,
PROP_RECTIFIED,
- PROP_REGION_START
+ PROP_ZERO_LINE,
+ PROP_REGION_START,
+ PROP_LOGSCALED,
};
static void gnome_canvas_waveview_class_init (GnomeCanvasWaveViewClass *class);
static void gnome_canvas_waveview_set_channel (GnomeCanvasWaveView *,
guint32);
-static gint32 gnome_canvas_waveview_ensure_cache (GnomeCanvasWaveView *waveview,
+static guint32 gnome_canvas_waveview_ensure_cache (GnomeCanvasWaveView *waveview,
gulong start_sample,
gulong end_sample);
+
+static int _gradient_rendering = 0;
+
static GnomeCanvasItemClass *parent_class;
GType
PROP_DATA_SRC,
g_param_spec_pointer ("data_src", NULL, NULL,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_CHANNEL,
g_param_spec_uint ("channel", NULL, NULL,
0, G_MAXUINT, 0,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_LENGTH_FUNCTION,
g_param_spec_pointer ("length_function", NULL, NULL,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_SOURCEFILE_LENGTH_FUNCTION,
g_param_spec_pointer ("sourcefile_length_function", NULL, NULL,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_PEAK_FUNCTION,
g_param_spec_pointer ("peak_function", NULL, NULL,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_GAIN_FUNCTION,
g_param_spec_pointer ("gain_function", NULL, NULL,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_GAIN_SRC,
g_param_spec_pointer ("gain_src", NULL, NULL,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_CACHE,
g_param_spec_pointer ("cache", NULL, NULL,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_CACHE_UPDATER,
g_param_spec_boolean ("cache_updater", NULL, NULL,
FALSE,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_SAMPLES_PER_UNIT,
g_param_spec_double ("samples_per_unit", NULL, NULL,
0.0, G_MAXDOUBLE, 0.0,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_AMPLITUDE_ABOVE_AXIS,
g_param_spec_double ("amplitude_above_axis", NULL, NULL,
0.0, G_MAXDOUBLE, 0.0,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_X,
g_param_spec_double ("x", NULL, NULL,
0.0, G_MAXDOUBLE, 0.0,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_Y,
g_param_spec_double ("y", NULL, NULL,
0.0, G_MAXDOUBLE, 0.0,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_HEIGHT,
g_param_spec_double ("height", NULL, NULL,
0.0, G_MAXDOUBLE, 0.0,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
g_object_class_install_property
(gobject_class,
PROP_WAVE_COLOR,
g_param_spec_uint ("wave_color", NULL, NULL,
0, G_MAXUINT, 0,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
+ g_object_class_install_property
+ (gobject_class,
+ PROP_CLIP_COLOR,
+ g_param_spec_uint ("clip_color", NULL, NULL,
+ 0, G_MAXUINT, 0,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+
+ g_object_class_install_property
+ (gobject_class,
+ PROP_ZERO_COLOR,
+ g_param_spec_uint ("zero_color", NULL, NULL,
+ 0, G_MAXUINT, 0,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+
+ g_object_class_install_property
+ (gobject_class,
+ PROP_FILL_COLOR,
+ g_param_spec_uint ("fill_color", NULL, NULL,
+ 0, G_MAXUINT, 0,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+
+ g_object_class_install_property
+ (gobject_class,
+ PROP_FILLED,
+ g_param_spec_boolean ("filled", NULL, NULL,
+ FALSE,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+
g_object_class_install_property
(gobject_class,
PROP_RECTIFIED,
g_param_spec_boolean ("rectified", NULL, NULL,
FALSE,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
+ g_object_class_install_property
+ (gobject_class,
+ PROP_ZERO_LINE,
+ g_param_spec_boolean ("zero_line", NULL, NULL,
+ FALSE,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+
+ g_object_class_install_property
+ (gobject_class,
+ PROP_LOGSCALED,
+ g_param_spec_boolean ("logscaled", NULL, NULL,
+ FALSE,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+
g_object_class_install_property
(gobject_class,
PROP_REGION_START,
g_param_spec_uint ("region_start", NULL, NULL,
0, G_MAXUINT, 0,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
-
+
object_class->destroy = gnome_canvas_waveview_destroy;
-
+
item_class->update = gnome_canvas_waveview_update;
item_class->bounds = gnome_canvas_waveview_bounds;
item_class->point = gnome_canvas_waveview_point;
item_class->draw = gnome_canvas_waveview_draw;
}
+void
+gnome_canvas_waveview_set_gradient_waveforms (int yn)
+{
+ _gradient_rendering = yn;
+}
+
GnomeCanvasWaveViewCache*
-gnome_canvas_waveview_cache_new ()
+gnome_canvas_waveview_cache_new (void)
{
GnomeCanvasWaveViewCache *c;
waveview->gain_curve_function = NULL;
waveview->gain_src = NULL;
waveview->rectified = FALSE;
+ waveview->logscaled = FALSE;
+ waveview->filled = TRUE;
+ waveview->zero_line = FALSE;
waveview->region_start = 0;
waveview->samples_per_unit = 1.0;
waveview->amplitude_above_axis = 1.0;
waveview->screen_width = gdk_screen_width ();
waveview->reload_cache_in_render = FALSE;
- waveview->wave_color = RGBA_TO_UINT(44,35,126,255);
+ waveview->wave_color = 0;
+ waveview->clip_color = 0;
+ waveview->zero_color = 0;
+ waveview->fill_color = 0;
}
static void
gnome_canvas_waveview_destroy (GtkObject *object)
{
- GnomeCanvasWaveView *waveview;
-
g_return_if_fail (object != NULL);
g_return_if_fail (GNOME_IS_CANVAS_WAVEVIEW (object));
- waveview = GNOME_CANVAS_WAVEVIEW (object);
-
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
#define DEBUG_CACHE 0
#undef CACHE_MEMMOVE_OPTIMIZATION
-static gint32
+/** @return cache index of start_sample within the cache */
+static guint32
gnome_canvas_waveview_ensure_cache (GnomeCanvasWaveView *waveview, gulong start_sample, gulong end_sample)
{
gulong required_cache_entries;
end_sample = end_sample + waveview->region_start;
#if DEBUG_CACHE
// printf("waveview->region_start == %lu\n",waveview->region_start);
- printf ("=> 0x%x cache @ 0x%x range: %lu - %lu request: %lu - %lu (%lu frames)\n",
+ // c_stacktrace ();
+ printf ("\n\n=> 0x%x cache @ 0x%x range: %lu - %lu request: %lu - %lu (%lu frames)\n",
waveview, cache,
cache->start, cache->end,
start_sample, end_sample, end_sample - start_sample);
#endif
-
+
if (cache->start <= start_sample && cache->end >= end_sample) {
#if DEBUG_CACHE
// printf ("0x%x: cache hit for %lu-%lu (cache holds: %lu-%lu\n",
}
/* make sure the cache is at least twice as wide as the screen width, and put the start sample
- in the middle, ensuring that we cover the end_sample.
+ in the middle, ensuring that we cover the end_sample.
*/
/* Note the assumption that we have a 1:1 units:pixel ratio for the canvas. Its everywhere ... */
-
+
half_width = (gulong) floor ((waveview->screen_width * waveview->samples_per_unit)/2.0 + 0.5);
-
+
if (start_sample < half_width) {
new_cache_start = 0;
} else {
}
#if DEBUG_CACHE
- fprintf (stderr, "\n\nAVAILABLE FRAMES = %lu of %lu, start = %lu, sstart = %lu, cstart = %lu\n",
+ fprintf (stderr, "AVAILABLE FRAMES = %lu of %lu, start = %lu, sstart = %lu, cstart = %lu\n",
rf3, waveview->sourcefile_length_function (waveview->data_src, waveview->samples_per_unit),
waveview->region_start, start_sample, new_cache_start);
#endif
ostart = new_cache_start;
#ifdef CACHE_MEMMOVE_OPTIMIZATION
-
+
/* data is not entirely in the cache, so go fetch it, making sure to fill the cache */
/* some of the required cache entries are in the cache, but in the wrong
*/
if (cache->start < new_cache_start && new_cache_start < cache->end) {
-
- /* case one: the common area is at the end of the existing cache. move it
+
+ /* case one: the common area is at the end of the existing cache. move it
to the beginning of the cache, and set up to refill whatever remains.
-
-
+
+
wv->cache_start wv->cache_end
|-------------------------------------------------------| cache
|--------------------------------| requested
<------------------->
"present"
- new_cache_start new_cache_end
+ new_cache_start new_cache_end
*/
-
+
present_frames = cache->end - new_cache_start;
present_entries = (gulong) floor (present_frames / waveview->samples_per_unit);
-#if DEBUG_CACHE
+#if DEBUG_CACHE
fprintf (stderr, "existing material at end of current cache, move to start of new cache\n"
"\tcopy from %lu to start\n", cache->data_size - present_entries);
#endif
memmove (&cache->data[0],
&cache->data[cache->data_size - present_entries],
present_entries * sizeof (GnomeCanvasWaveViewCacheEntry));
-
+
#if DEBUG_CACHE
fprintf (stderr, "satisfied %lu of %lu frames, offset = %lu, will start at %lu (ptr = 0x%x)\n",
present_frames, required_frames, present_entries, new_cache_start + present_entries,
} else if (new_cache_end > cache->start && new_cache_end < cache->end) {
- /* case two: the common area lives at the beginning of the existing cache.
-
+ /* case two: the common area lives at the beginning of the existing cache.
+
wv->cache_start wv->cache_end
|-----------------------------------------------------|
|--------------------------------|
new_cache_start new_cache_end
*/
-
+
present_frames = new_cache_end - cache->start;
present_entries = (gulong) floor (present_frames / waveview->samples_per_unit);
memmove (&cache->data[cache->data_size - present_entries],
&cache->data[0],
present_entries * sizeof (GnomeCanvasWaveViewCacheEntry));
-
-#if DEBUG_CACHE
+
+#if DEBUG_CACHE
fprintf (stderr, "existing material at start of current cache, move to start of end cache\n");
#endif
offset = 0;
required_frames -= present_frames;
-
+
} else {
copied = 0;
offset = 0;
waveview->peak_function (waveview->data_src, npeaks, new_cache_start, required_frames, cache->data + offset, waveview->channel,waveview->samples_per_unit);
/* take into account any copied peaks */
-
+
npeaks += copied;
} else {
npeaks = copied;
}
free (gain);
-
+
+ }
+
+ /* do optional log scaling. this implementation is not particularly efficient */
+
+ if (waveview->logscaled) {
+ guint32 n;
+ GnomeCanvasWaveViewCacheEntry* buf = cache->data;
+
+ for (n = 0; n < cache->data_size; ++n) {
+
+ if (buf[n].max > 0.0f) {
+ buf[n].max = alt_log_meter(fast_coefficient_to_dB(buf[n].max));
+ } else if (buf[n].max < 0.0f) {
+ buf[n].max = -alt_log_meter(fast_coefficient_to_dB(-buf[n].max));
+ }
+
+ if (buf[n].min > 0.0f) {
+ buf[n].min = alt_log_meter(fast_coefficient_to_dB(buf[n].min));
+ } else if (buf[n].min < 0.0f) {
+ buf[n].min = -alt_log_meter(fast_coefficient_to_dB(-buf[n].min));
+ }
+ }
}
-
+
cache->start = ostart;
cache->end = new_cache_end;
out:
#if DEBUG_CACHE
- fprintf (stderr, "return cache index = %d\n",
- (gint32) floor ((((double) (start_sample - cache->start)) / waveview->samples_per_unit) + 0.5));
+ fprintf (stderr, "return cache index = %d\n",
+ (guint32) floor ((((double) (start_sample - cache->start)) / waveview->samples_per_unit) + 0.5));
#endif
- return (gint32) floor ((((double) (start_sample - cache->start)) / waveview->samples_per_unit) + 0.5);
+ return (guint32) floor ((((double) (start_sample - cache->start)) / waveview->samples_per_unit) + 0.5);
}
waveview->reload_cache_in_render = TRUE;
return;
}
-
+
waveview->cache->start = 0;
waveview->cache->end = 0;
}
if (waveview->channel == chan) {
return;
}
-
+
waveview->channel = chan;
}
-static void
+static void
gnome_canvas_waveview_reset_bounds (GnomeCanvasItem *item)
{
gnome_canvas_update_bbox (item, Ix1, Iy1, Ix2, Iy2);
}
-/*
- * CANVAS CALLBACKS
+/*
+ * CANVAS CALLBACKS
*/
static void
GParamSpec *pspec)
{
+ (void) pspec;
+
GnomeCanvasItem *item;
GnomeCanvasWaveView *waveview;
int redraw = FALSE;
item = GNOME_CANVAS_ITEM (object);
waveview = GNOME_CANVAS_WAVEVIEW (object);
+ void * ptr;
switch (prop_id) {
case PROP_DATA_SRC:
gnome_canvas_waveview_set_data_src (waveview, g_value_get_pointer(value));
break;
case PROP_LENGTH_FUNCTION:
- waveview->length_function = g_value_get_pointer(value);
+ ptr = g_value_get_pointer(value);
+ waveview->length_function = POSIX_FUNC_PTR_CAST(waveview_length_function_t, ptr);
redraw = TRUE;
break;
+
case PROP_SOURCEFILE_LENGTH_FUNCTION:
- waveview->sourcefile_length_function = g_value_get_pointer(value);
+ ptr = g_value_get_pointer(value);
+ waveview->sourcefile_length_function = POSIX_FUNC_PTR_CAST(waveview_sourcefile_length_function_t, ptr);
redraw = TRUE;
break;
case PROP_PEAK_FUNCTION:
- waveview->peak_function = g_value_get_pointer(value);
+ ptr = g_value_get_pointer(value);
+ waveview->peak_function = POSIX_FUNC_PTR_CAST(waveview_peak_function_t, ptr);
redraw = TRUE;
break;
case PROP_GAIN_FUNCTION:
- waveview->gain_curve_function = g_value_get_pointer(value);
- redraw = TRUE;
+ ptr = g_value_get_pointer(value);
+ waveview->gain_curve_function = POSIX_FUNC_PTR_CAST(waveview_gain_curve_function_t, ptr);
+ redraw = TRUE;
break;
case PROP_GAIN_SRC:
}
break;
+ case PROP_CLIP_COLOR:
+ if (waveview->clip_color != g_value_get_uint(value)) {
+ waveview->clip_color = g_value_get_uint(value);
+ redraw = TRUE;
+ }
+ break;
+
+ case PROP_ZERO_COLOR:
+ if (waveview->zero_color != g_value_get_uint(value)) {
+ waveview->zero_color = g_value_get_uint(value);
+ redraw = TRUE;
+ }
+ break;
+
+ case PROP_FILL_COLOR:
+ if (waveview->fill_color != g_value_get_uint(value)) {
+ waveview->fill_color = g_value_get_uint(value);
+ redraw = TRUE;
+ }
+ break;
+
+ case PROP_FILLED:
+ if (waveview->filled != g_value_get_boolean(value)) {
+ waveview->filled = g_value_get_boolean(value);
+ redraw = TRUE;
+ }
+ break;
+
case PROP_RECTIFIED:
if (waveview->rectified != g_value_get_boolean(value)) {
waveview->rectified = g_value_get_boolean(value);
redraw = TRUE;
}
break;
+
+ case PROP_ZERO_LINE:
+ if (waveview->zero_line != g_value_get_boolean(value)) {
+ waveview->zero_line = g_value_get_boolean(value);
+ redraw = TRUE;
+ }
+ break;
+
+ case PROP_LOGSCALED:
+ if (waveview->logscaled != g_value_get_boolean(value)) {
+ waveview->logscaled = g_value_get_boolean(value);
+ if (waveview->cache_updater) {
+ waveview->cache->start = 0;
+ waveview->cache->end = 0;
+ }
+ redraw = TRUE;
+ calc_bounds = TRUE;
+ }
+ break;
case PROP_REGION_START:
waveview->region_start = g_value_get_uint(value);
redraw = TRUE;
}
static void
-gnome_canvas_waveview_get_property (GObject *object,
- guint prop_id,
- GValue *value,
- GParamSpec *pspec)
+gnome_canvas_waveview_get_property (
+ GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
{
-
-
+
+
g_return_if_fail (object != NULL);
- g_return_if_fail (GNOME_IS_CANVAS_WAVEVIEW (object));
+ g_return_if_fail (GNOME_IS_CANVAS_WAVEVIEW (object));
GnomeCanvasWaveView *waveview = GNOME_CANVAS_WAVEVIEW (object);
switch (prop_id) {
case PROP_DATA_SRC:
- g_value_set_pointer(value, waveview->data_src);
+ g_value_set_pointer(value, waveview->data_src);
break;
case PROP_CHANNEL:
- g_value_set_uint(value, waveview->channel);
+ g_value_set_uint(value, waveview->channel);
break;
case PROP_LENGTH_FUNCTION:
- g_value_set_pointer(value, waveview->length_function);
+ g_value_set_pointer(value, POSIX_FUNC_PTR_CAST(void*, waveview->length_function));
break;
case PROP_SOURCEFILE_LENGTH_FUNCTION:
- g_value_set_pointer(value, waveview->sourcefile_length_function);
+ g_value_set_pointer(value, POSIX_FUNC_PTR_CAST(void*, waveview->sourcefile_length_function));
break;
case PROP_PEAK_FUNCTION:
- g_value_set_pointer(value, waveview->peak_function);
+ g_value_set_pointer(value, POSIX_FUNC_PTR_CAST(void*, waveview->peak_function));
break;
case PROP_GAIN_FUNCTION:
- g_value_set_pointer(value, waveview->gain_curve_function);
+ g_value_set_pointer(value, POSIX_FUNC_PTR_CAST(void*, waveview->gain_curve_function));
break;
case PROP_GAIN_SRC:
- g_value_set_pointer(value, waveview->gain_src);
+ g_value_set_pointer(value, waveview->gain_src);
break;
case PROP_CACHE:
- g_value_set_pointer(value, waveview->cache);
+ g_value_set_pointer(value, waveview->cache);
break;
case PROP_CACHE_UPDATER:
- g_value_set_boolean(value, waveview->cache_updater);
+ g_value_set_boolean(value, waveview->cache_updater);
break;
case PROP_SAMPLES_PER_UNIT:
- g_value_set_double(value, waveview->samples_per_unit);
+ g_value_set_double(value, waveview->samples_per_unit);
break;
case PROP_AMPLITUDE_ABOVE_AXIS:
- g_value_set_double(value, waveview->amplitude_above_axis);
+ g_value_set_double(value, waveview->amplitude_above_axis);
break;
case PROP_X:
g_value_set_uint (value, waveview->wave_color);
break;
+ case PROP_CLIP_COLOR:
+ g_value_set_uint (value, waveview->clip_color);
+ break;
+
+ case PROP_ZERO_COLOR:
+ g_value_set_uint (value, waveview->zero_color);
+ break;
+
+ case PROP_FILL_COLOR:
+ g_value_set_uint (value, waveview->fill_color);
+ break;
+
+ case PROP_FILLED:
+ g_value_set_boolean (value, waveview->filled);
+ break;
+
case PROP_RECTIFIED:
g_value_set_boolean (value, waveview->rectified);
break;
+ case PROP_ZERO_LINE:
+ g_value_set_boolean (value, waveview->zero_line);
+ break;
+
+ case PROP_LOGSCALED:
+ g_value_set_boolean (value, waveview->logscaled);
+ break;
+
case PROP_REGION_START:
g_value_set_uint (value, waveview->region_start);
break;
UINT_TO_RGBA (waveview->wave_color, &waveview->wave_r, &waveview->wave_g, &waveview->wave_b,
&waveview->wave_a);
+ UINT_TO_RGBA (waveview->clip_color, &waveview->clip_r, &waveview->clip_g, &waveview->clip_b,
+ &waveview->clip_a);
+ UINT_TO_RGBA (waveview->fill_color, &waveview->fill_r, &waveview->fill_g, &waveview->fill_b,
+ &waveview->fill_a);
// check_cache (waveview, "end of update");
}
static void
-gnome_canvas_waveview_render (GnomeCanvasItem *item,
- GnomeCanvasBuf *buf)
+gnome_canvas_waveview_gradient_render (GnomeCanvasItem *item,
+ GnomeCanvasBuf *buf)
{
GnomeCanvasWaveView *waveview;
gulong s1, s2;
int clip_length = 0;
int pymin, pymax;
- int cache_index;
+ guint cache_index;
double half_height;
- int x, end, begin;
+ int x;
+ char rectify;
waveview = GNOME_CANVAS_WAVEVIEW (item);
buf->is_bg = FALSE;
}
- begin = MAX(waveview->bbox_ulx,buf->rect.x0);
+ /* a "unit" means a pixel */
- if (waveview->bbox_lrx >= 0) {
- end = MIN(waveview->bbox_lrx,buf->rect.x1);
- } else {
- end = buf->rect.x1;
- }
+ /* begin: render start x (units) */
+ int const begin = MAX (waveview->bbox_ulx, buf->rect.x0);
+
+ /* zbegin: start x for zero line (units) */
+ int const zbegin = (begin == waveview->bbox_ulx) ? (begin + 1) : begin;
+
+ /* end: render end x (units) */
+ int const end = (waveview->bbox_lrx >= 0) ? MIN (waveview->bbox_lrx,buf->rect.x1) : buf->rect.x1;
+
+ /* zend: end x for zero-line (units) */
+ int const zend = (end == waveview->bbox_lrx) ? (end - 1) : end;
if (begin == end) {
return;
}
- s1 = floor ((begin - waveview->bbox_ulx) * waveview->samples_per_unit) ;
+ /* s1: start sample
+ s2: end sample
+ */
+
+ s1 = floor ((begin - waveview->bbox_ulx) * waveview->samples_per_unit);
// fprintf (stderr, "0x%x begins at sample %f\n", waveview, waveview->bbox_ulx * waveview->samples_per_unit);
waveview->reload_cache_in_render = FALSE;
}
- cache_index = gnome_canvas_waveview_ensure_cache (waveview, s1, s2);
-
// check_cache (waveview, "post-ensure");
- /*
+ /* don't rectify at single-sample zoom */
+ if (waveview->rectified && waveview->samples_per_unit > 1) {
+ rectify = TRUE;
+ }
+ else {
+ rectify = FALSE;
+ }
+
+ clip_length = MIN(5,(waveview->height/4));
+
+ /*
Now draw each line, clipping it appropriately. The clipping
is done by the macros PAINT_FOO().
*/
half_height = waveview->half_height;
/* this makes it slightly easier to comprehend whats going on */
-
#define origin half_height
- for (x = begin; x < end; x++) {
-
+ if (waveview->filled && !rectify) {
+ int prev_pymin = 1;
+ int prev_pymax = 0;
+ int last_pymin = 1;
+ int last_pymax = 0;
+ int next_pymin, next_pymax;
double max, min;
- int clip_max, clip_min;
-
- clip_max = 0;
- clip_min = 0;
+ int next_clip_max = 0;
+ int next_clip_min = 0;
+
+ int wave_middle = (int) rint ((item->y1 + origin) * item->canvas->pixels_per_unit);
+ int wave_top = (int) rint ((item->y1) * item->canvas->pixels_per_unit);
+
+ if (s1 < waveview->samples_per_unit) {
+ /* we haven't got a prev vars to compare with, so outline the whole line here */
+ prev_pymax = (int) rint ((item->y1 + origin) * item->canvas->pixels_per_unit);
+ prev_pymin = prev_pymax;
+ }
+ else {
+ s1 -= waveview->samples_per_unit;
+ }
+
+ if(end == waveview->bbox_lrx) {
+ /* we don't have the NEXT vars for the last sample */
+ last_pymax = (int) rint ((item->y1 + origin) * item->canvas->pixels_per_unit);
+ last_pymin = last_pymax;
+ }
+ else {
+ s2 += waveview->samples_per_unit;
+ }
+
+ cache_index = gnome_canvas_waveview_ensure_cache (waveview, s1, s2);
+ /*
+ * Compute the variables outside the rendering rect
+ */
+ if(prev_pymax != prev_pymin) {
+
+ prev_pymax = (int) rint ((item->y1 + origin - MIN(waveview->cache->data[cache_index].max, 1.0) * half_height) * item->canvas->pixels_per_unit);
+ prev_pymin = (int) rint ((item->y1 + origin - MAX(waveview->cache->data[cache_index].min, -1.0) * half_height) * item->canvas->pixels_per_unit);
+ ++cache_index;
+ }
+ if(last_pymax != last_pymin) {
+ /* take the index of one sample right of what we render */
+ guint index = cache_index + (end - begin);
+
+ if (index >= waveview->cache->data_size) {
+
+ /* the data we want is off the end of the cache, which must mean its beyond
+ the end of the region's source; hence the peak values are 0 */
+ last_pymax = (int) rint ((item->y1 + origin) * item->canvas->pixels_per_unit);
+ last_pymin = (int) rint ((item->y1 + origin) * item->canvas->pixels_per_unit);
+
+ } else {
+
+ last_pymax = (int) rint ((item->y1 + origin - MIN(waveview->cache->data[index].max, 1.0) * half_height) * item->canvas->pixels_per_unit);
+ last_pymin = (int) rint ((item->y1 + origin - MAX(waveview->cache->data[index].min, -1.0) * half_height) * item->canvas->pixels_per_unit);
+
+ }
+
+ }
+
+ /*
+ * initialize NEXT* variables for the first run, duplicated in the loop for speed
+ */
max = waveview->cache->data[cache_index].max;
min = waveview->cache->data[cache_index].min;
-
+
if (max >= 1.0) {
max = 1.0;
- clip_max = 1;
+ next_clip_max = 1;
}
if (min <= -1.0) {
min = -1.0;
- clip_min = 1;
+ next_clip_min = 1;
+ }
+
+ max *= half_height;
+ min *= half_height;
+
+ next_pymax = (int) rint ((item->y1 + origin - max) * item->canvas->pixels_per_unit);
+ next_pymin = (int) rint ((item->y1 + origin - min) * item->canvas->pixels_per_unit);
+
+ /*
+ * And now the loop
+ */
+ for(x = begin; x < end; ++x) {
+ int clip_max = next_clip_max;
+ int clip_min = next_clip_min;
+ int fill_max, fill_min;
+
+ pymax = next_pymax;
+ pymin = next_pymin;
+
+ /* compute next */
+ if(x == end - 1) {
+ /*next is now the last column, which is outside the rendering rect, and possibly outside the region*/
+ next_pymax = last_pymax;
+ next_pymin = last_pymin;
+ }
+ else {
+ ++cache_index;
+
+ if (cache_index < waveview->cache->data_size) {
+ max = waveview->cache->data[cache_index].max;
+ min = waveview->cache->data[cache_index].min;
+ } else {
+ max = min = 0;
+ }
+
+ next_clip_max = 0;
+ next_clip_min = 0;
+
+ if (max >= 1.0) {
+ max = 1.0;
+ next_clip_max = 1;
+ }
+
+ if (min <= -1.0) {
+ min = -1.0;
+ next_clip_min = 1;
+ }
+
+ max *= half_height;
+ min *= half_height;
+
+ next_pymax = (int) rint ((item->y1 + origin - max) * item->canvas->pixels_per_unit);
+ next_pymin = (int) rint ((item->y1 + origin - min) * item->canvas->pixels_per_unit);
+ }
+
+ /* render */
+ if (pymax == pymin) {
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymin);
+ } else {
+ if((prev_pymax < pymax && next_pymax < pymax) ||
+ (prev_pymax == pymax && next_pymax == pymax)) {
+ fill_max = pymax + 1;
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax);
+ }
+ else {
+ fill_max = MAX(prev_pymax, next_pymax);
+ if(pymax == fill_max) {
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax);
+ ++fill_max;
+ } else {
+ PAINT_VERTA_GR(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax, fill_max, wave_middle, wave_top);
+ }
+
+ }
+
+ if((prev_pymin > pymin && next_pymin > pymin) ||
+ (prev_pymin == pymin && next_pymin == pymin)) {
+ fill_min = pymin - 1;
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymin-1);
+ }
+ else {
+ fill_min = MIN(prev_pymin, next_pymin);
+ if(pymin == fill_min) {
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymin);
+ }
+ else {
+ PAINT_VERTA_GR(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, fill_min, pymin, wave_middle, wave_top);
+ }
+ }
+
+ if(fill_max < fill_min) {
+ PAINT_VERTA_GR(buf, waveview->fill_r, waveview->fill_g, waveview->fill_b, waveview->fill_a, x, fill_max, fill_min, wave_middle, wave_top);
+ }
+ else if(fill_max == fill_min) {
+ PAINT_DOTA(buf, waveview->fill_r, waveview->fill_g, waveview->fill_b, waveview->fill_a, x, fill_max);
+ }
+ }
+
+ if (clip_max) {
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a, x, pymax, pymax + clip_length);
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a >> 1, x + 1, pymax, pymax + (clip_length -1));
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a >> 1, x - 1, pymax, pymax + (clip_length - 1));
+
+ }
+
+ if (clip_min) {
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a , x, pymin - clip_length, pymin);
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a >> 1, x + 1, pymin - (clip_length - 1), pymin);
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a >> 1, x - 1, pymin - (clip_length - 1), pymin);
+ }
+
+ prev_pymax = pymax;
+ prev_pymin = pymin;
+ }
+
+ } else if (waveview->filled && rectify) {
+
+ int prev_pymax = -1;
+ int last_pymax = -1;
+ int next_pymax;
+ double max, min;
+ int next_clip_max = 0;
+ int next_clip_min = 0;
+
+ int wave_middle = (int) rint ((item->y1 + waveview->height) * item->canvas->pixels_per_unit);
+ int wave_top = (int) rint ((item->y1) * item->canvas->pixels_per_unit);
+
+ // for rectified, this stays constant throughout the loop
+ pymin = (int) rint ((item->y1 + waveview->height) * item->canvas->pixels_per_unit);
+
+ if(s1 < waveview->samples_per_unit) {
+ /* we haven't got a prev vars to compare with, so outline the whole line here */
+ prev_pymax = pymin;
+ }
+ else {
+ s1 -= waveview->samples_per_unit;
+ }
+
+ if(end == waveview->bbox_lrx) {
+ /* we don't have the NEXT vars for the last sample */
+ last_pymax = pymin;
+ }
+ else {
+ s2 += waveview->samples_per_unit;
}
- /* don't rectify at single-sample zoom */
+ cache_index = gnome_canvas_waveview_ensure_cache (waveview, s1, s2);
- if (waveview->rectified && waveview->samples_per_unit > 1) {
+ /*
+ * Compute the variables outside the rendering rect
+ */
+ if(prev_pymax < 0) {
+ max = MIN(waveview->cache->data[cache_index].max, 1.0);
+ min = MAX(waveview->cache->data[cache_index].min, -1.0);
if (fabs (min) > fabs (max)) {
max = fabs (min);
- }
+ }
- max = max * waveview->height;
+ prev_pymax = (int) rint ((item->y1 + waveview->height - max * waveview->height) * item->canvas->pixels_per_unit);
+ ++cache_index;
+ }
+ if(last_pymax < 0) {
+ /* take the index of one sample right of what we render */
+ int index = cache_index + (end - begin);
- pymax = (int) rint ((item->y1 + waveview->height - max) * item->canvas->pixels_per_unit);
- pymin = (int) rint ((item->y1 + waveview->height) * item->canvas->pixels_per_unit);
+ max = MIN(waveview->cache->data[index].max, 1.0);
+ min = MAX(waveview->cache->data[index].min, -1.0);
- } else {
-
- max = max * half_height;
- min = min * half_height;
-
- pymax = (int) rint ((item->y1 + origin - max) * item->canvas->pixels_per_unit);
- pymin = (int) rint ((item->y1 + origin - min) * item->canvas->pixels_per_unit);
+ if (fabs (min) > fabs (max)) {
+ max = fabs (min);
+ }
+
+ last_pymax = (int) rint ((item->y1 + waveview->height - max * waveview->height) * item->canvas->pixels_per_unit);
}
- /* OK, now fill the RGB buffer at x=i with a line between pymin and pymax,
- or, if samples_per_unit == 1, then a dot at each location.
- */
+ /*
+ * initialize NEXT* variables for the first run, duplicated in the loop for speed
+ */
+ max = waveview->cache->data[cache_index].max;
+ min = waveview->cache->data[cache_index].min;
- if (pymax == pymin) {
- PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymin);
- } else {
- PAINT_VERTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax, pymin);
+ if (max >= 1.0) {
+ max = 1.0;
+ next_clip_max = 1;
}
-
- /* show clipped waveforms with small red lines */
- if (clip_max || clip_min) {
- clip_length = MIN(5,(waveview->height/4));
+ if (min <= -1.0) {
+ min = -1.0;
+ next_clip_min = 1;
}
- if (clip_max) {
- PAINT_VERT(buf, 255, 0, 0, x, pymax, pymax+clip_length);
+ if (fabs (min) > fabs (max)) {
+ max = fabs (min);
}
- if (clip_min) {
- PAINT_VERT(buf, 255, 0, 0, x, pymin-clip_length, pymin);
+ next_pymax = (int) rint ((item->y1 + waveview->height - max * waveview->height) * item->canvas->pixels_per_unit);
+
+ /*
+ * And now the loop
+ */
+ for(x = begin; x < end; ++x) {
+ int clip_max = next_clip_max;
+ int clip_min = next_clip_min;
+ int fill_max;
+
+ pymax = next_pymax;
+
+ /* compute next */
+ if(x == end - 1) {
+ /*next is now the last column, which is outside the rendering rect, and possibly outside the region*/
+ next_pymax = last_pymax;
+ }
+ else {
+ ++cache_index;
+
+ max = waveview->cache->data[cache_index].max;
+ min = waveview->cache->data[cache_index].min;
+
+ if (max >= 1.0) {
+ max = 1.0;
+ next_clip_max = 1;
+ }
+
+ if (min <= -1.0) {
+ min = -1.0;
+ next_clip_min = 1;
+ }
+
+ if (fabs (min) > fabs (max)) {
+ max = fabs (min);
+ }
+
+ next_pymax = (int) rint ((item->y1 + waveview->height - max * waveview->height) * item->canvas->pixels_per_unit);
+ }
+
+ /* render */
+ if (pymax == pymin) {
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymin);
+ } else {
+ if((prev_pymax < pymax && next_pymax < pymax) ||
+ (prev_pymax == pymax && next_pymax == pymax)) {
+ fill_max = pymax + 1;
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax);
+ }
+ else {
+ fill_max = MAX(prev_pymax, next_pymax);
+ if(pymax == fill_max) {
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax);
+ ++fill_max;
+ }
+ else {
+ PAINT_VERTA_GR(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax, fill_max, wave_middle, wave_top);
+ }
+ }
+
+ if(fill_max < pymin) {
+ PAINT_VERTA(buf, waveview->fill_r, waveview->fill_g, waveview->fill_b, waveview->fill_a, x, fill_max, pymin);
+ }
+ else if(fill_max == pymin) {
+ PAINT_DOTA(buf, waveview->fill_r, waveview->fill_g, waveview->fill_b, waveview->fill_a, x, pymin);
+ }
+ }
+
+ if (clip_max) {
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a, x, pymax, pymax + clip_length);
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a >> 1, x + 1, pymax, pymax + (clip_length -1));
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a >> 1, x - 1, pymax, pymax + (clip_length - 1));
+ }
+
+ if (clip_min) {
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a , x, pymin - clip_length, pymin);
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a >> 1, x + 1, pymin - (clip_length - 1), pymin);
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a >> 1, x - 1, pymin - (clip_length - 1), pymin);
+ }
+
+ prev_pymax = pymax;
}
+ }
+ else {
+ cache_index = gnome_canvas_waveview_ensure_cache (waveview, s1, s2);
- /* presto, we're done */
-
- cache_index++;
+ for (x = begin; x < end; x++) {
+
+ double max, min;
+ int clip_max, clip_min;
+
+ clip_max = 0;
+ clip_min = 0;
+
+ max = waveview->cache->data[cache_index].max;
+ min = waveview->cache->data[cache_index].min;
+
+ if (max >= 1.0) {
+ max = 1.0;
+ clip_max = 1;
+ }
+
+ if (min <= -1.0) {
+ min = -1.0;
+ clip_min = 1;
+ }
+
+ if (rectify) {
+
+ if (fabs (min) > fabs (max)) {
+ max = fabs (min);
+ }
+
+ max = max * waveview->height;
+
+ pymax = (int) rint ((item->y1 + waveview->height - max) * item->canvas->pixels_per_unit);
+ pymin = (int) rint ((item->y1 + waveview->height) * item->canvas->pixels_per_unit);
+
+ } else {
+
+ max = max * half_height;
+ min = min * half_height;
+
+ pymax = (int) rint ((item->y1 + origin - max) * item->canvas->pixels_per_unit);
+ pymin = (int) rint ((item->y1 + origin - min) * item->canvas->pixels_per_unit);
+ }
+
+ /* OK, now fill the RGB buffer at x=i with a line between pymin and pymax,
+ or, if samples_per_unit == 1, then a dot at each location.
+ */
+
+ if (pymax == pymin) {
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymin);
+ } else {
+ PAINT_VERTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax, pymin);
+ }
+
+ /* show clipped waveforms with small red lines */
+
+ if (clip_max) {
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a, x, pymax, pymax+clip_length);
+ }
+
+ if (clip_min) {
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a, x, pymin-clip_length, pymin);
+ }
+
+ /* presto, we're done */
+
+ cache_index++;
+ }
}
+ if (!waveview->rectified && waveview->zero_line && waveview->height >= 100) {
+ // Paint zeroline.
+
+ unsigned char zero_r, zero_g, zero_b, zero_a;
+ UINT_TO_RGBA( waveview->zero_color, &zero_r, &zero_g, &zero_b, &zero_a);
+ int zeroline_y = (int) rint ((item->y1 + origin) * item->canvas->pixels_per_unit);
+ PAINT_HORIZA(buf, zero_r, zero_g, zero_b, zero_a, zbegin, zend, zeroline_y);
+ }
#undef origin
}
static void
-gnome_canvas_waveview_draw (GnomeCanvasItem *item,
- GdkDrawable *drawable,
- int x, int y,
- int width, int height)
+gnome_canvas_waveview_flat_render (GnomeCanvasItem *item,
+ GnomeCanvasBuf *buf)
{
GnomeCanvasWaveView *waveview;
+ gulong s1, s2;
+ int clip_length = 0;
+ int pymin, pymax;
+ guint cache_index;
+ double half_height;
+ int x;
+ char rectify;
waveview = GNOME_CANVAS_WAVEVIEW (item);
- if (parent_class->draw) {
- (* parent_class->draw) (item, drawable, x, y, width, height);
+// check_cache (waveview, "start of render");
+
+ if (parent_class->render) {
+ (*parent_class->render) (item, buf);
}
- fprintf (stderr, "please don't use the CanvasWaveView item in a non-aa Canvas\n");
- abort ();
-}
+ if (buf->is_bg) {
+ gnome_canvas_buf_ensure_buf (buf);
+ buf->is_bg = FALSE;
+ }
-static void
-gnome_canvas_waveview_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
-{
- GnomeCanvasWaveView *waveview = GNOME_CANVAS_WAVEVIEW (item);
+ /* a "unit" means a pixel */
- *x1 = waveview->x;
- *y1 = waveview->y;
+ /* begin: render start x (units) */
+ int const begin = MAX (waveview->bbox_ulx, buf->rect.x0);
- *x2 = ceil (*x1 + (waveview->length_function (waveview->data_src) / waveview->samples_per_unit));
- *y2 = *y1 + waveview->height;
+ /* zbegin: start x for zero line (units) */
+ int const zbegin = (begin == waveview->bbox_ulx) ? (begin + 1) : begin;
-#if 0
- x = 0; y = 0;
- gnome_canvas_item_i2w (item, &x, &y);
- gnome_canvas_w2c_d (GNOME_CANVAS(item->canvas), x, y, &a, &b);
- x = *x2;
- y = *y2;
- gnome_canvas_item_i2w (item, &x, &y);
- gnome_canvas_w2c_d (GNOME_CANVAS(item->canvas), x, y, &c, &d);
- printf ("item bounds now (%g,%g),(%g,%g)\n", a, b, c, d);
-#endif
+ /* end: render end x (units) */
+ int const end = (waveview->bbox_lrx >= 0) ? MIN (waveview->bbox_lrx,buf->rect.x1) : buf->rect.x1;
-}
+ /* zend: end x for zero-line (units) */
+ int const zend = (end == waveview->bbox_lrx) ? (end - 1) : end;
+
+ if (begin == end) {
+ return;
+ }
+
+ /* s1: start sample
+ s2: end sample
+ */
+
+ s1 = floor ((begin - waveview->bbox_ulx) * waveview->samples_per_unit);
+
+ // fprintf (stderr, "0x%x begins at sample %f\n", waveview, waveview->bbox_ulx * waveview->samples_per_unit);
+
+ if (end == waveview->bbox_lrx) {
+ /* This avoids minor rounding errors when we have the
+ entire region visible.
+ */
+ s2 = waveview->samples;
+ } else {
+ s2 = s1 + floor ((end - begin) * waveview->samples_per_unit);
+ }
+
+#if 0
+ printf ("0x%x r (%d..%d)(%d..%d) bbox (%d..%d)(%d..%d)"
+ " b/e %d..%d s= %lu..%lu @ %f\n",
+ waveview,
+ buf->rect.x0,
+ buf->rect.x1,
+ buf->rect.y0,
+ buf->rect.y1,
+ waveview->bbox_ulx,
+ waveview->bbox_lrx,
+ waveview->bbox_uly,
+ waveview->bbox_lry,
+ begin, end, s1, s2,
+ waveview->samples_per_unit);
+#endif
+
+ /* now ensure that the cache is full and properly
+ positioned.
+ */
+
+// check_cache (waveview, "pre-ensure");
+
+ if (waveview->cache_updater && waveview->reload_cache_in_render) {
+ waveview->cache->start = 0;
+ waveview->cache->end = 0;
+ waveview->reload_cache_in_render = FALSE;
+ }
+
+// check_cache (waveview, "post-ensure");
+
+ /* don't rectify at single-sample zoom */
+ if (waveview->rectified && waveview->samples_per_unit > 1) {
+ rectify = TRUE;
+ }
+ else {
+ rectify = FALSE;
+ }
+
+ clip_length = MIN(5,(waveview->height/4));
+
+ /*
+ Now draw each line, clipping it appropriately. The clipping
+ is done by the macros PAINT_FOO().
+ */
+
+ half_height = waveview->half_height;
+
+/* this makes it slightly easier to comprehend whats going on */
+#define origin half_height
+
+ if (waveview->filled && !rectify) {
+ int prev_pymin = 1;
+ int prev_pymax = 0;
+ int last_pymin = 1;
+ int last_pymax = 0;
+ int next_pymin, next_pymax;
+ double max, min;
+ int next_clip_max = 0;
+ int next_clip_min = 0;
+
+ if (s1 < waveview->samples_per_unit) {
+ /* we haven't got a prev vars to compare with, so outline the whole line here */
+ prev_pymax = (int) rint ((item->y1 + origin) * item->canvas->pixels_per_unit);
+ prev_pymin = prev_pymax;
+ }
+ else {
+ s1 -= waveview->samples_per_unit;
+ }
+
+ if(end == waveview->bbox_lrx) {
+ /* we don't have the NEXT vars for the last sample */
+ last_pymax = (int) rint ((item->y1 + origin) * item->canvas->pixels_per_unit);
+ last_pymin = last_pymax;
+ }
+ else {
+ s2 += waveview->samples_per_unit;
+ }
+
+ cache_index = gnome_canvas_waveview_ensure_cache (waveview, s1, s2);
+
+ /*
+ * Compute the variables outside the rendering rect
+ */
+ if(prev_pymax != prev_pymin) {
+
+ prev_pymax = (int) rint ((item->y1 + origin - MIN(waveview->cache->data[cache_index].max, 1.0) * half_height) * item->canvas->pixels_per_unit);
+ prev_pymin = (int) rint ((item->y1 + origin - MAX(waveview->cache->data[cache_index].min, -1.0) * half_height) * item->canvas->pixels_per_unit);
+ ++cache_index;
+ }
+ if(last_pymax != last_pymin) {
+ /* take the index of one sample right of what we render */
+ guint index = cache_index + (end - begin);
+
+ if (index >= waveview->cache->data_size) {
+
+ /* the data we want is off the end of the cache, which must mean its beyond
+ the end of the region's source; hence the peak values are 0 */
+ last_pymax = (int) rint ((item->y1 + origin) * item->canvas->pixels_per_unit);
+ last_pymin = (int) rint ((item->y1 + origin) * item->canvas->pixels_per_unit);
+
+ } else {
+
+ last_pymax = (int) rint ((item->y1 + origin - MIN(waveview->cache->data[index].max, 1.0) * half_height) * item->canvas->pixels_per_unit);
+ last_pymin = (int) rint ((item->y1 + origin - MAX(waveview->cache->data[index].min, -1.0) * half_height) * item->canvas->pixels_per_unit);
+
+ }
+
+ }
+
+ /*
+ * initialize NEXT* variables for the first run, duplicated in the loop for speed
+ */
+ max = waveview->cache->data[cache_index].max;
+ min = waveview->cache->data[cache_index].min;
+
+ if (max >= 1.0) {
+ max = 1.0;
+ next_clip_max = 1;
+ }
+
+ if (min <= -1.0) {
+ min = -1.0;
+ next_clip_min = 1;
+ }
+
+ max *= half_height;
+ min *= half_height;
+
+ next_pymax = (int) rint ((item->y1 + origin - max) * item->canvas->pixels_per_unit);
+ next_pymin = (int) rint ((item->y1 + origin - min) * item->canvas->pixels_per_unit);
+
+ /*
+ * And now the loop
+ */
+ for(x = begin; x < end; ++x) {
+ int clip_max = next_clip_max;
+ int clip_min = next_clip_min;
+ int fill_max, fill_min;
+
+ pymax = next_pymax;
+ pymin = next_pymin;
+
+ /* compute next */
+ if(x == end - 1) {
+ /*next is now the last column, which is outside the rendering rect, and possibly outside the region*/
+ next_pymax = last_pymax;
+ next_pymin = last_pymin;
+ }
+ else {
+ ++cache_index;
+
+ if (cache_index < waveview->cache->data_size) {
+ max = waveview->cache->data[cache_index].max;
+ min = waveview->cache->data[cache_index].min;
+ } else {
+ max = min = 0;
+ }
+
+ next_clip_max = 0;
+ next_clip_min = 0;
+
+ if (max >= 1.0) {
+ max = 1.0;
+ next_clip_max = 1;
+ }
+
+ if (min <= -1.0) {
+ min = -1.0;
+ next_clip_min = 1;
+ }
+
+ max *= half_height;
+ min *= half_height;
+
+ next_pymax = (int) rint ((item->y1 + origin - max) * item->canvas->pixels_per_unit);
+ next_pymin = (int) rint ((item->y1 + origin - min) * item->canvas->pixels_per_unit);
+ }
+
+ /* render */
+ if (pymax == pymin) {
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymin);
+ } else {
+ if((prev_pymax < pymax && next_pymax < pymax) ||
+ (prev_pymax == pymax && next_pymax == pymax)) {
+ fill_max = pymax + 1;
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax);
+ }
+ else {
+ fill_max = MAX(prev_pymax, next_pymax);
+ if(pymax == fill_max) {
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax);
+ ++fill_max;
+ }
+ else {
+ PAINT_VERTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax, fill_max);
+ }
+ }
+
+ if((prev_pymin > pymin && next_pymin > pymin) ||
+ (prev_pymin == pymin && next_pymin == pymin)) {
+ fill_min = pymin - 1;
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymin-1);
+ }
+ else {
+ fill_min = MIN(prev_pymin, next_pymin);
+ if(pymin == fill_min) {
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymin);
+ }
+ else {
+ PAINT_VERTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, fill_min, pymin);
+ }
+ }
+
+ if(fill_max < fill_min) {
+ PAINT_VERTA(buf, waveview->fill_r, waveview->fill_g, waveview->fill_b, waveview->fill_a, x, fill_max, fill_min);
+ }
+ else if(fill_max == fill_min) {
+ PAINT_DOTA(buf, waveview->fill_r, waveview->fill_g, waveview->fill_b, waveview->fill_a, x, fill_max);
+ }
+ }
+
+ if (clip_max) {
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a, x, pymax, pymax+clip_length);
+ }
+
+ if (clip_min) {
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a, x, pymin-clip_length, pymin);
+ }
+
+ prev_pymax = pymax;
+ prev_pymin = pymin;
+ }
+
+ } else if (waveview->filled && rectify) {
+
+ int prev_pymax = -1;
+ int last_pymax = -1;
+ int next_pymax;
+ double max, min;
+ int next_clip_max = 0;
+ int next_clip_min = 0;
+
+ // for rectified, this stays constant throughout the loop
+ pymin = (int) rint ((item->y1 + waveview->height) * item->canvas->pixels_per_unit);
+
+ if(s1 < waveview->samples_per_unit) {
+ /* we haven't got a prev vars to compare with, so outline the whole line here */
+ prev_pymax = pymin;
+ }
+ else {
+ s1 -= waveview->samples_per_unit;
+ }
+
+ if(end == waveview->bbox_lrx) {
+ /* we don't have the NEXT vars for the last sample */
+ last_pymax = pymin;
+ }
+ else {
+ s2 += waveview->samples_per_unit;
+ }
+
+ cache_index = gnome_canvas_waveview_ensure_cache (waveview, s1, s2);
+
+ /*
+ * Compute the variables outside the rendering rect
+ */
+ if(prev_pymax < 0) {
+ max = MIN(waveview->cache->data[cache_index].max, 1.0);
+ min = MAX(waveview->cache->data[cache_index].min, -1.0);
+
+ if (fabs (min) > fabs (max)) {
+ max = fabs (min);
+ }
+
+ prev_pymax = (int) rint ((item->y1 + waveview->height - max * waveview->height) * item->canvas->pixels_per_unit);
+ ++cache_index;
+ }
+ if(last_pymax < 0) {
+ /* take the index of one sample right of what we render */
+ int index = cache_index + (end - begin);
+
+ max = MIN(waveview->cache->data[index].max, 1.0);
+ min = MAX(waveview->cache->data[index].min, -1.0);
+
+ if (fabs (min) > fabs (max)) {
+ max = fabs (min);
+ }
+
+ last_pymax = (int) rint ((item->y1 + waveview->height - max * waveview->height) * item->canvas->pixels_per_unit);
+ }
+
+ /*
+ * initialize NEXT* variables for the first run, duplicated in the loop for speed
+ */
+ max = waveview->cache->data[cache_index].max;
+ min = waveview->cache->data[cache_index].min;
+
+ if (max >= 1.0) {
+ max = 1.0;
+ next_clip_max = 1;
+ }
+
+ if (min <= -1.0) {
+ min = -1.0;
+ next_clip_min = 1;
+ }
+
+ if (fabs (min) > fabs (max)) {
+ max = fabs (min);
+ }
+
+ next_pymax = (int) rint ((item->y1 + waveview->height - max * waveview->height) * item->canvas->pixels_per_unit);
+
+ /*
+ * And now the loop
+ */
+ for(x = begin; x < end; ++x) {
+ int clip_max = next_clip_max;
+ int clip_min = next_clip_min;
+ int fill_max;
+
+ pymax = next_pymax;
+
+ /* compute next */
+ if(x == end - 1) {
+ /*next is now the last column, which is outside the rendering rect, and possibly outside the region*/
+ next_pymax = last_pymax;
+ }
+ else {
+ ++cache_index;
+
+ max = waveview->cache->data[cache_index].max;
+ min = waveview->cache->data[cache_index].min;
+
+ if (max >= 1.0) {
+ max = 1.0;
+ next_clip_max = 1;
+ }
+
+ if (min <= -1.0) {
+ min = -1.0;
+ next_clip_min = 1;
+ }
+
+ if (fabs (min) > fabs (max)) {
+ max = fabs (min);
+ }
+
+ next_pymax = (int) rint ((item->y1 + waveview->height - max * waveview->height) * item->canvas->pixels_per_unit);
+ }
+
+ /* render */
+ if (pymax == pymin) {
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymin);
+ } else {
+ if((prev_pymax < pymax && next_pymax < pymax) ||
+ (prev_pymax == pymax && next_pymax == pymax)) {
+ fill_max = pymax + 1;
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax);
+ }
+ else {
+ fill_max = MAX(prev_pymax, next_pymax);
+ if(pymax == fill_max) {
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax);
+ ++fill_max;
+ }
+ else {
+ PAINT_VERTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax, fill_max);
+ }
+ }
+
+ if(fill_max < pymin) {
+ PAINT_VERTA(buf, waveview->fill_r, waveview->fill_g, waveview->fill_b, waveview->fill_a, x, fill_max, pymin);
+ }
+ else if(fill_max == pymin) {
+ PAINT_DOTA(buf, waveview->fill_r, waveview->fill_g, waveview->fill_b, waveview->fill_a, x, pymin);
+ }
+ }
+
+ if (clip_max) {
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a, x, pymax, pymax+clip_length);
+ }
+
+ if (clip_min) {
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a, x, pymin-clip_length, pymin);
+ }
+
+ prev_pymax = pymax;
+ }
+ }
+ else {
+ cache_index = gnome_canvas_waveview_ensure_cache (waveview, s1, s2);
+
+ for (x = begin; x < end; x++) {
+
+ double max, min;
+ int clip_max, clip_min;
+
+ clip_max = 0;
+ clip_min = 0;
+
+ max = waveview->cache->data[cache_index].max;
+ min = waveview->cache->data[cache_index].min;
+
+ if (max >= 1.0) {
+ max = 1.0;
+ clip_max = 1;
+ }
+
+ if (min <= -1.0) {
+ min = -1.0;
+ clip_min = 1;
+ }
+
+ if (rectify) {
+
+ if (fabs (min) > fabs (max)) {
+ max = fabs (min);
+ }
+
+ max = max * waveview->height;
+
+ pymax = (int) rint ((item->y1 + waveview->height - max) * item->canvas->pixels_per_unit);
+ pymin = (int) rint ((item->y1 + waveview->height) * item->canvas->pixels_per_unit);
+
+ } else {
+
+ max = max * half_height;
+ min = min * half_height;
+
+ pymax = (int) rint ((item->y1 + origin - max) * item->canvas->pixels_per_unit);
+ pymin = (int) rint ((item->y1 + origin - min) * item->canvas->pixels_per_unit);
+ }
+
+ /* OK, now fill the RGB buffer at x=i with a line between pymin and pymax,
+ or, if samples_per_unit == 1, then a dot at each location.
+ */
+
+ if (pymax == pymin) {
+ PAINT_DOTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymin);
+ } else {
+ PAINT_VERTA(buf, waveview->wave_r, waveview->wave_g, waveview->wave_b, waveview->wave_a, x, pymax, pymin);
+ }
+
+ /* show clipped waveforms with small red lines */
+
+ if (clip_max) {
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a, x, pymax, pymax+clip_length);
+ }
+
+ if (clip_min) {
+ PAINT_VERTA(buf, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a, x, pymin-clip_length, pymin);
+ }
+
+ /* presto, we're done */
+
+ cache_index++;
+ }
+ }
+
+ if (!waveview->rectified && waveview->zero_line && waveview->height >= 100) {
+ // Paint zeroline.
+
+ unsigned char zero_r, zero_g, zero_b, zero_a;
+ UINT_TO_RGBA( waveview->zero_color, &zero_r, &zero_g, &zero_b, &zero_a);
+ int zeroline_y = (int) rint ((item->y1 + origin) * item->canvas->pixels_per_unit);
+ PAINT_HORIZA(buf, zero_r, zero_g, zero_b, zero_a, zbegin, zend, zeroline_y);
+ }
+#undef origin
+}
+
+static void
+gnome_canvas_waveview_render (GnomeCanvasItem *item,
+ GnomeCanvasBuf *buf)
+{
+ if (_gradient_rendering) {
+ gnome_canvas_waveview_gradient_render (item, buf);
+ } else {
+ gnome_canvas_waveview_flat_render (item, buf);
+ }
+}
+
+static void
+gnome_canvas_waveview_draw (GnomeCanvasItem *item,
+ GdkDrawable *drawable,
+ int x, int y,
+ int width, int height)
+{
+ GnomeCanvasWaveView *waveview;
+ cairo_t* cr;
+ gulong s1, s2;
+ int cache_index;
+ gboolean rectify;
+ double origin;
+ double xoff;
+ double yoff = 0.0;
+ double ulx;
+ double uly;
+ double lrx;
+ double lry;
+
+ waveview = GNOME_CANVAS_WAVEVIEW (item);
+
+ /* compute intersection of Drawable area and waveview,
+ in canvas coordinate space
+ */
+
+ if (x > waveview->bbox_ulx) {
+ ulx = x;
+ } else {
+ ulx = waveview->bbox_ulx;
+ }
+
+ if (y > waveview->bbox_uly) {
+ uly = y;
+ } else {
+ uly = waveview->bbox_uly;
+ }
+
+ if (x + width > waveview->bbox_lrx) {
+ lrx = waveview->bbox_lrx;
+ } else {
+ lrx = x + width;
+ }
+
+ if (y + height > waveview->bbox_lry) {
+ lry = waveview->bbox_lry;
+ } else {
+ lry = y + height;
+ }
+
+ /* figure out which samples we need for the resulting intersection */
+
+ s1 = floor ((ulx - waveview->bbox_ulx) * waveview->samples_per_unit) ;
+
+ if (lrx == waveview->bbox_lrx) {
+ /* This avoids minor rounding errors when we have the
+ entire region visible.
+ */
+ s2 = waveview->samples;
+ } else {
+ s2 = s1 + floor ((lrx - ulx) * waveview->samples_per_unit);
+ }
+
+ /* translate back to buffer coordinate space */
+
+ ulx -= x;
+ uly -= y;
+ lrx -= x;
+ lry -= y;
+
+ /* don't rectify at single-sample zoom */
+ if(waveview->rectified && waveview->samples_per_unit > 1.0) {
+ rectify = TRUE;
+ } else {
+ rectify = FALSE;
+ }
+
+ cr = gdk_cairo_create (drawable);
+ cairo_set_line_width (cr, 0.5);
+
+ origin = waveview->bbox_uly - y + waveview->half_height;
+
+ cairo_rectangle (cr, ulx, uly, lrx - ulx, lry - uly);
+ cairo_clip (cr);
+
+ if (waveview->cache_updater && waveview->reload_cache_in_render) {
+ waveview->cache->start = 0;
+ waveview->cache->end = 0;
+ waveview->reload_cache_in_render = FALSE;
+ }
+
+ cache_index = gnome_canvas_waveview_ensure_cache (waveview, s1, s2);
+
+#if 0
+ printf ("%p r (%d,%d)(%d,%d)[%d x %d] bbox (%d,%d)(%d,%d)[%d x %d]"
+ " draw (%.1f,%.1f)(%.1f,%.1f)[%.1f x %.1f] s= %lu..%lu\n",
+ waveview,
+ x, y,
+ x + width,
+ y + height,
+ width,
+ height,
+ waveview->bbox_ulx,
+ waveview->bbox_uly,
+ waveview->bbox_lrx,
+ waveview->bbox_lry,
+ waveview->bbox_lrx - waveview->bbox_ulx,
+ waveview->bbox_lry - waveview->bbox_uly,
+ ulx, uly,
+ lrx, lry,
+ lrx - ulx,
+ lry - uly,
+ s1, s2);
+#endif
+
+ /* draw the top half */
+
+ for (xoff = ulx; xoff < lrx; xoff++) {
+ double max, min;
+
+ max = waveview->cache->data[cache_index].max;
+ min = waveview->cache->data[cache_index].min;
+
+ if (min <= -1.0) {
+ min = -1.0;
+ }
+
+ if (max >= 1.0) {
+ max = 1.0;
+ }
+
+ if (rectify) {
+ if (fabs (min) > fabs (max)) {
+ max = fabs (min);
+ }
+ }
+
+ yoff = origin - (waveview->half_height * max) + 0.5;
+
+ if (xoff == ulx) {
+ /* first point */
+ cairo_move_to (cr, xoff+0.5, yoff);
+ } else {
+ cairo_line_to (cr, xoff+0.5, yoff);
+ }
+
+ cache_index++;
+ }
+
+ /* from the final top point, move out of the clip zone */
+
+ cairo_line_to (cr, xoff + 10, yoff);
+
+ /* now draw the bottom half */
+
+ for (--xoff, --cache_index; xoff >= ulx; --xoff) {
+ double min;
+
+ min = waveview->cache->data[cache_index].min;
+
+ if (min <= -1.0) {
+ min = -1.0;
+ }
+
+ yoff = origin - (waveview->half_height * min) + 0.5;
+
+ cairo_line_to (cr, xoff+0.5, yoff);
+ cache_index--;
+ }
+
+ /* from the final lower point, move out of the clip zone */
+
+ cairo_line_to (cr, xoff - 10, yoff);
+
+ /* close path to fill */
+
+ cairo_close_path (cr);
+
+ /* fill and stroke */
+
+ cairo_set_source_rgba (cr,
+ (waveview->fill_r/255.0),
+ (waveview->fill_g/255.0),
+ (waveview->fill_b/255.0),
+ (waveview->fill_a/255.0));
+ cairo_fill_preserve (cr);
+ cairo_set_source_rgba (cr,
+ (waveview->wave_r/255.0),
+ (waveview->wave_g/255.0),
+ (waveview->wave_b/255.0),
+ (waveview->wave_a/255.0));
+ cairo_stroke (cr);
+
+ cairo_destroy (cr);
+}
+
+#if 0
+ if (clip_max || clip_min) {
+ cairo_set_source_rgba (cr, waveview->clip_r, waveview->clip_g, waveview->clip_b, waveview->clip_a);
+ }
+
+ if (clip_max) {
+ cairo_move_to (cr, xoff, yoff1);
+ cairo_line_to (cr, xoff, yoff1 + clip_length);
+ cairo_stroke (cr);
+ }
+
+ if (clip_min) {
+ cairo_move_to (cr, xoff, yoff2);
+ cairo_line_to (cr, xoff, yoff2 - clip_length);
+ cairo_stroke (cr);
+ }
+
+#endif
+
+static void
+gnome_canvas_waveview_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
+{
+ GnomeCanvasWaveView *waveview = GNOME_CANVAS_WAVEVIEW (item);
+
+ *x1 = waveview->x;
+ *y1 = waveview->y;
+
+ *x2 = ceil (*x1 + (waveview->length_function (waveview->data_src) / waveview->samples_per_unit));
+ *y2 = *y1 + waveview->height;
+
+#if 0
+ x = 0; y = 0;
+ gnome_canvas_item_i2w (item, &x, &y);
+ gnome_canvas_w2c_d (GNOME_CANVAS(item->canvas), x, y, &a, &b);
+ x = *x2;
+ y = *y2;
+ gnome_canvas_item_i2w (item, &x, &y);
+ gnome_canvas_w2c_d (GNOME_CANVAS(item->canvas), x, y, &c, &d);
+ printf ("item bounds now (%g,%g),(%g,%g)\n", a, b, c, d);
+#endif
+
+}
static double
gnome_canvas_waveview_point (GnomeCanvasItem *item, double x, double y, int cx, int cy, GnomeCanvasItem **actual_item)
{
- /* XXX for now, point is never inside the wave
+ (void) item;
+ (void) x;
+ (void) y;
+ (void) cx;
+ (void) cy;
+ (void) actual_item;
+
+ /* XXX for now, point is never inside the wave
GnomeCanvasWaveView *waveview;
double x1, y1, x2, y2;
double dx, dy;
gnome_canvas_waveview_bounds (item, &x1, &y1, &x2, &y2);
/* Is point inside rectangle */
-
+
if ((x >= x1) && (y >= y1) && (x <= x2) && (y <= y2)) {
return 0.0;
}
projects / ardour.git / blobdiff