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Code Issues Releases Wiki Activity

Performance improvements for track spectrum display and PCM

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import submitted by Sami Liedes.
This commit is contained in:
BusinessmanProgrammerSteve
2010-09-13 01:31:54 +00:00
parent 1d6e1593ee
commit c0b5fb01da
6 changed files with 101 additions and 67 deletions
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82
src/AColor.cpp
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@@ -568,46 +568,58 @@ void AColor::DarkMIDIChannel(wxDC * dc, int channel /* 1 - 16 */ )
}
void GetColorGradient(float value,
bool selected,
bool grayscale,
unsigned char *red,
unsigned char *green, unsigned char *blue)
{
float r, g, b;
bool AColor::gradient_inited = 0;
if (grayscale) {
r = g = b = 0.84 - 0.84 * value;
} else {
const int gsteps = 4;
float gradient[gsteps + 1][3] = {
{float(0.75), float(0.75), float(0.75)}, // lt gray
{float(0.30), float(0.60), float(1.00)}, // lt blue
{float(0.90), float(0.10), float(0.90)}, // violet
{float(1.00), float(0.00), float(0.00)}, // red
{float(1.00), float(1.00), float(1.00)} // white
};
unsigned char AColor::gradient_pre[2][2][gradientSteps][3];
int left = int (value * gsteps);
int right = (left == gsteps ? gsteps : left + 1);
void AColor::PreComputeGradient() {
{
if (!gradient_inited) {
gradient_inited = 1;
float rweight = (value * gsteps) - left;
float lweight = 1.0 - rweight;
for (int selected = 0; selected <= 1; selected++)
for (int grayscale = 0; grayscale <= 1; grayscale++) {
float r, g, b;
r = (gradient[left][0] * lweight) + (gradient[right][0] * rweight);
g = (gradient[left][1] * lweight) + (gradient[right][1] * rweight);
b = (gradient[left][2] * lweight) + (gradient[right][2] * rweight);
int i;
for (i=0; i<gradientSteps; i++) {
float value = float(i)/gradientSteps;
if (grayscale) {
r = g = b = 0.84 - 0.84 * value;
} else {
const int gsteps = 4;
float gradient[gsteps + 1][3] = {
{float(0.75), float(0.75), float(0.75)}, // lt gray
{float(0.30), float(0.60), float(1.00)}, // lt blue
{float(0.90), float(0.10), float(0.90)}, // violet
{float(1.00), float(0.00), float(0.00)}, // red
{float(1.00), float(1.00), float(1.00)} // white
};
int left = int (value * gsteps);
int right = (left == gsteps ? gsteps : left + 1);
float rweight = (value * gsteps) - left;
float lweight = 1.0 - rweight;
r = (gradient[left][0] * lweight) + (gradient[right][0] * rweight);
g = (gradient[left][1] * lweight) + (gradient[right][1] * rweight);
b = (gradient[left][2] * lweight) + (gradient[right][2] * rweight);
}
if (selected) {
r *= 0.77f;
g *= 0.77f;
b *= 0.885f;
}
gradient_pre[selected][grayscale][i][0] = (unsigned char) (255 * r);
gradient_pre[selected][grayscale][i][1] = (unsigned char) (255 * g);
gradient_pre[selected][grayscale][i][2] = (unsigned char) (255 * b);
}
}
}
}
if (selected) {
r *= 0.77f;
g *= 0.77f;
b *= 0.885f;
}
*red = (unsigned char) (255 * r);
*green = (unsigned char) (255 * g);
*blue = (unsigned char) (255 * b);
}
// Indentation settings for Vim and Emacs and unique identifier for Arch, a