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Try to anchor top-left pixel on texture viewer when switching

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baldurk
2015-07-15 21:37:58 +02:00
parent d602ea090a
commit cd2db46628
1 changed files with 30 additions and 0 deletions
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renderdocui/Windows/TextureViewer.cs
+30
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@@ -883,6 +883,8 @@ namespace renderdocui.Windows
m_TextureSettings.Clear();
m_PrevArea = 0.0f;
saveTex.Enabled = false;
rtPanel.ClearThumbnails();
@@ -1326,6 +1328,8 @@ namespace renderdocui.Windows
private int prevFirstArraySlice = -1;
private int prevHighestMip = -1;
private float m_PrevArea = 0.0f;
private void UI_OnTextureSelectionChanged()
{
FetchTexture tex = CurrentTexture;
@@ -1357,6 +1361,32 @@ namespace renderdocui.Windows
m_CurPixelValue = null;
m_CurRealValue = null;
// try to maintain the pan in the new texture. If the new texture
// is an integer multiple of the old texture, this will keep the
// top left pixel the same. Due to the difference in scale, the rest
// of the image will be out though. This is useful for downsample chains and
// things where you're flipping back and forth between overlapping
// textures, but really needs a mode where the zoom level is changed
// to compensate as well.
float curArea = (float)CurrentTexture.width * (float)CurrentTexture.height;
if(m_PrevArea > 0.0f)
{
float prevX = m_TexDisplay.offx;
float prevY = m_TexDisplay.offy;
// this scale factor is arbitrary really, only intention is to have
// integer scales come out precisely, other 'similar' sizes will be
// similar ish
float scaleFactor = (float)(Math.Sqrt(curArea) / Math.Sqrt(m_PrevArea));
m_TexDisplay.offx = prevX * scaleFactor;
m_TexDisplay.offy = prevY * scaleFactor;
}
m_PrevArea = curArea;
// refresh scroll position
ScrollPosition = ScrollPosition;
UI_UpdateStatusText();