secondlife/viewer#2472: Debug tools for labeling textures

2 files changed, 65 insertions, 0 deletions

diff --git a/indra/llrender/llgltexture.cpp b/indra/llrender/llgltexture.cpp
index 4dcca5a726..9a2b2ef524 100644
--- a/indra/llrender/llgltexture.cpp
+++ b/indra/llrender/llgltexture.cpp
@@ -168,6 +168,68 @@ bool LLGLTexture::createGLTexture(S32 discard_level, const LLImageRaw* imageraw,
     return ret ;
 }
 
+void LLGLTexture::getGLObjectLabel(std::string& label, bool& error) const
+{
+    if (!mGLTexturep)
+    {
+        error = true;
+        label.clear();
+        return;
+    }
+    LLGLuint texname = mGLTexturep->getTexName();
+    if (!texname)
+    {
+        error = true;
+        label.clear();
+        return;
+    }
+    static GLsizei max_length = 0;
+    if (max_length == 0) { glGetIntegerv(GL_MAX_LABEL_LENGTH, &max_length); }
+    static char * clabel = new char[max_length+1];
+    GLsizei length;
+    glGetObjectLabel(GL_TEXTURE, texname, max_length+1, &length, clabel);
+    error = false;
+    label.assign(clabel, length);
+}
+
+std::string LLGLTexture::setGLObjectLabel(const std::string& prefix, bool append_texname) const
+{
+    llassert(mGLTexturep);
+    if (mGLTexturep)
+    {
+        LLGLuint texname = mGLTexturep->getTexName();
+        llassert(texname);
+        if (texname)
+        {
+            static GLsizei max_length = 0;
+            if (max_length == 0) { glGetIntegerv(GL_MAX_LABEL_LENGTH, &max_length); }
+
+            if (append_texname)
+            {
+                std::string label_with_texname = prefix + "_" + std::to_string(texname);
+                label_with_texname.resize(std::min(size_t(max_length), label_with_texname.size()));
+                glObjectLabel(GL_TEXTURE, texname, (GLsizei)label_with_texname.size(), label_with_texname.c_str());
+                return label_with_texname;
+            }
+            else
+            {
+                if (prefix.size() <= max_length)
+                {
+                    glObjectLabel(GL_TEXTURE, texname, (GLsizei)prefix.size(), prefix.c_str());
+                    return prefix;
+                }
+                else
+                {
+                    const std::string label(prefix.c_str(), max_length);
+                    glObjectLabel(GL_TEXTURE, texname, (GLsizei)label.size(), label.c_str());
+                    return label;
+                }
+            }
+        }
+    }
+    return "";
+}
+
 void LLGLTexture::setExplicitFormat(LLGLint internal_format, LLGLenum primary_format, LLGLenum type_format, bool swap_bytes)
 {
     llassert(mGLTexturep.notNull()) ;
diff --git a/indra/llrender/llgltexture.h b/indra/llrender/llgltexture.h
index 122d2a7f9c..22f2ed5131 100644
--- a/indra/llrender/llgltexture.h
+++ b/indra/llrender/llgltexture.h
@@ -118,6 +118,9 @@ public:
     LLGLuint   getTexName() const ;
     bool       createGLTexture() ;
 
+    void getGLObjectLabel(std::string& label, bool& error) const;
+    std::string setGLObjectLabel(const std::string& prefix, bool append_texname = false) const;
+
     // Create a GL Texture from an image raw
     // discard_level - mip level, 0 for highest resultion mip
     // imageraw - the image to copy from