public void SetShaderColorMask(TextureInspector.PreviewMode mode)
{
var mask = 15;
switch (mode)
{
case TextureInspector.PreviewMode.RGB: mask = 7; break;
case TextureInspector.PreviewMode.R: mask = 1; break;
case TextureInspector.PreviewMode.G: mask = 2; break;
case TextureInspector.PreviewMode.B: mask = 4; break;
case TextureInspector.PreviewMode.A: mask = 8; break;
}
m_Material.SetFloat(s_ShaderColorMask, (float)mask);
}
public void OnPreviewGUI(Texture t, Rect r, GUIStyle background, float exposure, TextureInspector.PreviewMode previewMode, float mipLevel)
{
if (t == null)
{
return;
}
if (!SystemInfo.supports2DArrayTextures)
{
EditorGUI.DropShadowLabel(new Rect(r.x, r.y, r.width, 40), "2D texture array preview not supported");
return;
}
InitPreviewMaterialIfNeeded();
m_Material.mainTexture = t;
int effectiveSlice = GetEffectiveSlice(t);
m_Material.SetFloat(s_ShaderSliceIndex, (float)effectiveSlice);
m_Material.SetFloat(s_ShaderToSrgb, QualitySettings.activeColorSpace == ColorSpace.Linear ? 1.0f : 0.0f);
m_Material.SetFloat(s_ShaderIsNormalMap, TextureInspector.IsNormalMap(t) ? 1.0f : 0.0f);
SetShaderColorMask(previewMode);
int texWidth = Mathf.Max(t.width, 1);
int texHeight = Mathf.Max(t.height, 1);
float effectiveMipLevel = GetMipLevelForRendering(t, mipLevel);
float zoomLevel = Mathf.Min(Mathf.Min(r.width / texWidth, r.height / texHeight), 1);
Rect wantedRect = new Rect(r.x, r.y, texWidth * zoomLevel, texHeight * zoomLevel);
PreviewGUI.BeginScrollView(r, m_Pos, wantedRect, "PreHorizontalScrollbar",
"PreHorizontalScrollbarThumb");
FilterMode oldFilter = t.filterMode;
TextureUtil.SetFilterModeNoDirty(t, FilterMode.Point);
EditorGUI.DrawPreviewTexture(wantedRect, t, m_Material, ScaleMode.StretchToFill, 0, effectiveMipLevel, UnityEngine.Rendering.ColorWriteMask.All, exposure);
TextureUtil.SetFilterModeNoDirty(t, oldFilter);
m_Pos = PreviewGUI.EndScrollView();
if (effectiveSlice != 0 || (int)effectiveMipLevel != 0)
{
EditorGUI.DropShadowLabel(new Rect(r.x, r.y + 10, r.width, 30),
"Slice " + effectiveSlice + "\nMip " + effectiveMipLevel);
}
}
