private void ResizeTexture(int w, int h)
{
if (buffer == null)
{
buffer = new TextureHandle(w, h);
}
else
{
buffer.SetTextureSize(w, h);
}
}
public void Render(IController controller)
{
GetSpectrum(controller);
Gl.glPushAttrib(Gl.GL_ENABLE_BIT);
Gl.glDisable(Gl.GL_DEPTH_TEST);
Gl.glTexEnvf(Gl.GL_TEXTURE_ENV, Gl.GL_TEXTURE_ENV_MODE, Gl.GL_DECAL);
// voiceprint
Gl.glMatrixMode(Gl.GL_PROJECTION);
Gl.glPushMatrix();
Gl.glLoadIdentity();
Glu.gluOrtho2D(0, controller.Width, 0, controller.Height);
Gl.glMatrixMode(Gl.GL_TEXTURE);
Gl.glPushMatrix();
Gl.glLoadIdentity();
Gl.glScalef(1f / controller.Width, 1f / controller.Height, 1f);
if (voiceprintBuffer == null)
{
voiceprintBuffer = new TextureHandle(controller.Width, controller.Height);
}
else
{
voiceprintBuffer.SetTextureSize(controller.Width, controller.Height);
}
Gl.glBindTexture(Gl.GL_TEXTURE_2D, voiceprintBuffer.TextureId);
// OPTIMIZATION: could just copy texture of width voiceprintHeightPx
// but then the coordinates get tricky
Gl.glCopyTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGB, 0, 0,
controller.Width, controller.Height, 0);
// clean palette
Gl.glClearColor(0, 0, 0, 1);
Gl.glClear(Gl.GL_COLOR_BUFFER_BIT);
// paste voiceprint region of copied texture, shifted down 1px
Gl.glEnable(Gl.GL_TEXTURE_2D);
Gl.glBegin(Gl.GL_QUADS);
Gl.glTexCoord2f(0, 1);
Gl.glVertex2f(0, 0);
Gl.glTexCoord2f(0, voiceprintHeightPx);
Gl.glVertex2f(0, voiceprintHeightPx - 1);
Gl.glTexCoord2f(controller.Width, voiceprintHeightPx);
Gl.glVertex2f(controller.Width, voiceprintHeightPx - 1);
Gl.glTexCoord2f(controller.Width, 1);
Gl.glVertex2f(controller.Width, 0);
Gl.glEnd();
Gl.glDisable(Gl.GL_TEXTURE_2D);
Gl.glBegin(Gl.GL_QUADS);
// instead of using a smoothed buffer like with the analyzer,
// use the direct buffer for nicer looking output (less blurry)
float x = 0;
for (int i = 0; i < bufferLength; i++)
{
float v = spectrumBuffer[i];
Color.FromHSL(120 * (1 - v), 1, Math.Min(0.5f, v)).Use();
// draw a little beyond the edge to ensure no visible seams
Gl.glVertex2f(x, voiceprintHeightPx - 1);
Gl.glVertex2f(x, voiceprintHeightPx + 1);
x += bufferScaling[i];
Gl.glVertex2f(x, voiceprintHeightPx + 1);
Gl.glVertex2f(x, voiceprintHeightPx - 1);
}
Gl.glEnd();
Gl.glMatrixMode(Gl.GL_TEXTURE);
Gl.glPopMatrix();
Gl.glMatrixMode(Gl.GL_PROJECTION);
Gl.glPopMatrix();
// analyzer
Gl.glMatrixMode(Gl.GL_PROJECTION);
Gl.glPushMatrix();
Gl.glLoadIdentity();
// analyzer at top side of screen
Glu.gluOrtho2D(-1, 1, 1 - analyzerHeightOrtho, 1);
RenderAnalyzer();// coordinates: [-1,+1] in x,y
Gl.glMatrixMode(Gl.GL_PROJECTION);
Gl.glPopMatrix();
Gl.glPopAttrib();
}
private void ResizeToWidgetSize()
{
if (renderWidth == widgetWidth &&
renderHeight == widgetHeight)
{
if (resizeTexture != null)
{
resizeTexture.Dispose();
resizeTexture = null;
}
return;
}
if (resizeTexture == null)
{
resizeTexture = new TextureHandle();
}
resizeTexture.SetTextureSize(renderWidth, renderHeight);
Gl.glPushAttrib(Gl.GL_ENABLE_BIT);
Gl.glDisable(Gl.GL_DEPTH_TEST);
Gl.glEnable(Gl.GL_TEXTURE_2D);
Gl.glTexEnvf(Gl.GL_TEXTURE_ENV, Gl.GL_TEXTURE_ENV_MODE, Gl.GL_DECAL);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_WRAP_S, Gl.GL_CLAMP);
Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_WRAP_T, Gl.GL_CLAMP);
Gl.glBindTexture(Gl.GL_TEXTURE_2D, resizeTexture.TextureId);
Gl.glCopyTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_RGB, 0, 0,
renderWidth, renderHeight, 0);
Gl.glViewport(0, 0, widgetWidth, widgetHeight);
Gl.glMatrixMode(Gl.GL_PROJECTION);
Gl.glLoadIdentity();
Gl.glMatrixMode(Gl.GL_MODELVIEW);
Gl.glLoadIdentity();
Gl.glColor4f(1, 1, 1, 1);
Gl.glBegin(Gl.GL_QUADS);
Gl.glTexCoord2f(0, 0);
Gl.glVertex2f(-1, -1);
Gl.glTexCoord2f(0, 1);
Gl.glVertex2f(-1, 1);
Gl.glTexCoord2f(1, 1);
Gl.glVertex2f(1, 1);
Gl.glTexCoord2f(1, 0);
Gl.glVertex2f(1, -1);
Gl.glEnd();
Gl.glPopAttrib();
}