static void
convert_from_rgba (guchar *pixels,
gint width)
{
guint32 *cairo_data = (guint32 *) pixels;
guchar *p;
gint i;
for (i = 0, p = pixels; i < width; i++)
{
guint32 r = *p++;
guint32 g = *p++;
guint32 b = *p++;
guint32 a = *p++;
if (a != 255)
{
guint32 tmp;
/* composite on a white background */
r = INT_BLEND (r, 255, a, tmp);
g = INT_BLEND (g, 255, a, tmp);
b = INT_BLEND (b, 255, a, tmp);
}
cairo_data[i] = 0xFF000000 | (r << 16) | (g << 8) | b;
}
}
/*****************************************************
* Create the cache bitmaps for drawing
* This is needed on resize, start and recoloring
*****************************************************/
bool IndexView::CalculateCache(BRect rect)
{
if (!OffScreen){
return false;
}
acquire_sem(indexSem);
BRect r = Bounds();
int32 size = INDEXVIEW_HEIGHT+1, temp;
rgb_color a[size], b[size], c[size], d[size];
rgb_color back2s = Prefs.index_back_color;
rgb_color back1s = Prefs.index_back_color2;
rgb_color back2 = Prefs.index_back_selected_color;
rgb_color back1 = Prefs.index_back_selected_color2;
rgb_color fore2s = Prefs.index_left_selected_color;
rgb_color fore1s = Prefs.index_left_selected_color2;
rgb_color fore2 = Prefs.index_left_color;
rgb_color fore1 = Prefs.index_left_color2;
for(int32 y=0; y<size; y++)
{
uint8 alpha = (uint8)(y*255/size);
a[y].red = INT_BLEND(back1.red, back2.red, alpha, temp);
a[y].green = INT_BLEND(back1.green, back2.green, alpha, temp);
a[y].blue = INT_BLEND(back1.blue, back2.blue, alpha, temp);
b[y].red = INT_BLEND(back1s.red, back2s.red, alpha, temp);
b[y].green = INT_BLEND(back1s.green, back2s.green, alpha, temp);
b[y].blue = INT_BLEND(back1s.blue, back2s.blue, alpha, temp);
c[y].red = INT_BLEND(fore1.red, fore2.red, alpha, temp);
c[y].green = INT_BLEND(fore1.green, fore2.green, alpha, temp);
c[y].blue = INT_BLEND(fore1.blue, fore2.blue, alpha, temp);
d[y].red = INT_BLEND(fore1s.red, fore2s.red, alpha, temp);
d[y].green = INT_BLEND(fore1s.green, fore2s.green, alpha, temp);
d[y].blue = INT_BLEND(fore1s.blue, fore2s.blue, alpha, temp);
}
int32 left = (int32)r.right+1;
int32 right = -1;
BitmapDrawer draw(OffScreen);
// the background
float w = r.Width();
if ((Pool.r_pointer - Pool.l_pointer) == Pool.size || Pool.sample_type == NONE){
for (int32 y = (int32)r.top; y < (int32)r.bottom; y++)
for (int32 x = (int32)r.left; x <= (int32)r.right; x++)
draw.PlotRGB( x, y, b[y] );
left = (int32)r.left;
right = (int32)r.right;
}else{
if (Pool.l_pointer>0){
r.right = Pool.l_pointer * w / Pool.size;
for (int32 y = (int32)r.top; y < (int32)r.bottom; y++)
for (int32 x = (int32)r.left; x <= (int32)r.right; x++)
draw.PlotRGB( x, y, a[y] );
r.left = r.right;
}
r.right = Pool.r_pointer * w / Pool.size;
for (int32 y = (int32)r.top; y < (int32)r.bottom; y++)
for (int32 x = (int32)r.left; x <= (int32)r.right; x++)
draw.PlotRGB( x, y, b[y] );
left = (int32)r.left;
right = (int32)r.right;
if (Pool.r_pointer != Pool.size){
r.left = r.right+1.0f;
r.right = Bounds().right;
for (int32 y = (int32)r.top; y < (int32)r.bottom; y++)
for (int32 x = (int32)r.left; x <= (int32)r.right; x++)
draw.PlotRGB( x, y, a[y] );
}
}
int32 mid = int32((r.bottom+r.top)/2);
// for (int32 x = (int32)r.left; x <= (int32)r.right; x++)
// draw.PlotRGB( x, mid, Prefs.index_mid_color );
if (Pool.sample_type != NONE){
// get the new index view data
if (Pool.sample_type == MONO)
Peak.MonoBuffer(index_memory_left, 0, Pool.size, Bounds().IntegerWidth()+1);
else if (Pool.sample_type == STEREO){
Peak.StereoBuffer(index_memory_left, index_memory_right, 0, Pool.size, Bounds().IntegerWidth()+1);
for (int32 i=0; i<r.right*2; i++){
index_memory_left[i] = (index_memory_left[i] + index_memory_right[i])/2.0;
}
}
// Draw the data
int32 amp = int32(r.Height()/2.0);
int32 index = 0, from, to;
for (int32 x=0; x<r.right; x++){
to = mid - int32(index_memory_left[ index ]*amp);
from = mid - int32(index_memory_left[ index+1 ]*amp);
if ( from == to && from != mid)
draw.PlotRGB( x, mid, Prefs.index_mid_color );
else if (x>=left && x<=right)
{
for (int32 y = from; y <= to; y++)
draw.PlotRGB( x, y, c[y] );
}
else
{
for (int32 y = from; y <= to; y++)
draw.PlotRGB( x, y, d[y] );
}
index += 2;
}
// draw pointer
if (Pool.selection == NONE){
int32 x = (int32)(Pool.pointer * w / Pool.size);
for (int32 y = (int32)r.top; y < (int32)r.bottom; y+=2)
draw.PlotRGB( x, y, Prefs.index_pointer_color );
}else{
r.top ++; r.bottom --;
r.left = Pool.pointer * w / Pool.size;
r.right = Pool.r_sel_pointer * w / Pool.size;
for (int32 y = (int32)r.top; y < (int32)r.bottom; y+=2)
{
draw.PlotRGB( (int32)r.left, y, Prefs.index_pointer_color );
draw.PlotRGB( (int32)r.right, y, Prefs.index_pointer_color );
}
int32 top = (int32)r.top;
int32 bottom = (int32)r.bottom;
for (int32 x = (int32)r.left; x < (int32)r.right; x+=2)
{
draw.PlotRGB( x, top, Prefs.index_pointer_color );
draw.PlotRGB( x, bottom, Prefs.index_pointer_color );
}
}
}
Pool.update_index = false;
release_sem(indexSem);
return true;
}