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OpenGL modernization: waterfall texture update optimization

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This commit is contained in:
f4exb 2016-03-05 12:12:55 +01:00
parent c5a45e57ee
commit fa23c4536f
1 changed files with 11 additions and 3 deletions
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14
sdrbase/gui/glspectrum.cpp
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@ -603,10 +603,18 @@ void GLSpectrum::paintGL()
}; };
for (int i = 0; i < m_waterfallBufferPos; i++) if (m_waterfallTexturePos + m_waterfallBufferPos < m_waterfallTextureHeight)
{ {
m_glShaderWaterfall.subTexture(0, m_waterfallTexturePos, m_fftSize, 1, m_waterfallBuffer->scanLine(i)); m_glShaderWaterfall.subTexture(0, m_waterfallTexturePos, m_fftSize, m_waterfallBufferPos, m_waterfallBuffer->scanLine(0));
m_waterfallTexturePos = (m_waterfallTexturePos + 1) % m_waterfallTextureHeight; m_waterfallTexturePos += m_waterfallBufferPos;
}
else
{
int breakLine = m_waterfallTextureHeight - m_waterfallTexturePos;
int linesLeft = m_waterfallTexturePos + m_waterfallBufferPos - m_waterfallTextureHeight;
m_glShaderWaterfall.subTexture(0, m_waterfallTexturePos, m_fftSize, breakLine, m_waterfallBuffer->scanLine(0));
m_glShaderWaterfall.subTexture(0, 0, m_fftSize, linesLeft, m_waterfallBuffer->scanLine(breakLine));
m_waterfallTexturePos = linesLeft;
} }
m_waterfallBufferPos = 0; m_waterfallBufferPos = 0;