From 2f4120038429c6aff865f153f708ceefb60d67f4 Mon Sep 17 00:00:00 2001
From: Dave Parks <davep@lindenlab.com>
Date: Tue, 28 May 2024 09:45:40 -0500
Subject: Remove tinygltf dependency from LL::GLTF (#1541)

* #1535 Image loading/saving support in boost::json driven GLTF parser
* #1536 GLB Support in boost::json drvien GLTF parser
---
 indra/llrender/llglslshader.cpp |  6 ++++++
 indra/llrender/llglslshader.h   | 17 +++++++++++++++++
 2 files changed, 23 insertions(+)

(limited to 'indra/llrender')

diff --git a/indra/llrender/llglslshader.cpp b/indra/llrender/llglslshader.cpp
index f6b1ca3741..ecd0c6908b 100644
--- a/indra/llrender/llglslshader.cpp
+++ b/indra/llrender/llglslshader.cpp
@@ -1049,6 +1049,12 @@ void LLGLSLShader::bind()
     }
 }
 
+void LLGLSLShader::bind(LLGLSLShader::GLTFVariant variant)
+{
+    llassert(mGLTFVariants.size() == LLGLSLShader::NUM_GLTF_VARIANTS);
+    mGLTFVariants[variant].bind();
+}
+
 void LLGLSLShader::bind(bool rigged)
 {
     if (rigged)
diff --git a/indra/llrender/llglslshader.h b/indra/llrender/llglslshader.h
index 75e1bdfd54..fa01d212e1 100644
--- a/indra/llrender/llglslshader.h
+++ b/indra/llrender/llglslshader.h
@@ -44,6 +44,7 @@ public:
     bool hasTransport = false; // implies no lighting (it's possible to have neither though)
     bool hasSkinning = false;
     bool hasObjectSkinning = false;
+    bool mGLTF = false;
     bool hasAtmospherics = false;
     bool hasGamma = false;
     bool hasShadows = false;
@@ -318,6 +319,22 @@ public:
     // this pointer should be set to whichever shader represents this shader's rigged variant
     LLGLSLShader* mRiggedVariant = nullptr;
 
+    // variants for use by GLTF renderer
+    // "this" is considered to be OPAQUE
+    enum GLTFVariant
+    {
+        STATIC_OPAQUE,
+        STATIC_BLEND,
+        RIGGED_OPAQUE,
+        RIGGED_BLEND,
+        NUM_GLTF_VARIANTS
+    };
+
+    std::vector<LLGLSLShader> mGLTFVariants;
+
+    //helper to bind GLTF variant
+    void bind(GLTFVariant variant);
+
     // hacky flag used for optimization in LLDrawPoolAlpha
     bool mCanBindFast = false;
 
-- 
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