From c3346f473ac7e3d49219c8dbc381d92f8fe3f017 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Konstantin=20K=C3=A4fer?= <mail@kkaefer.com>
Date: Fri, 4 May 2018 01:31:43 +0200
Subject: [core] Don't crash when attribute count is exceeded

---
 src/mbgl/programs/symbol_program.hpp | 50 +++++++++++++++++++++---------------
 1 file changed, 30 insertions(+), 20 deletions(-)

(limited to 'src/mbgl/programs/symbol_program.hpp')

diff --git a/src/mbgl/programs/symbol_program.hpp b/src/mbgl/programs/symbol_program.hpp
index 9b5037ed9f..51f9a48f7f 100644
--- a/src/mbgl/programs/symbol_program.hpp
+++ b/src/mbgl/programs/symbol_program.hpp
@@ -278,35 +278,45 @@ public:
             Shaders::fragmentSource)) {
     }
 
+    static typename AllUniforms::Values computeAllUniformValues(
+        const UniformValues& uniformValues,
+        const SymbolSizeBinder& symbolSizeBinder,
+        const PaintPropertyBinders& paintPropertyBinders,
+        const typename PaintProperties::PossiblyEvaluated& currentProperties,
+        float currentZoom) {
+        return uniformValues.concat(symbolSizeBinder.uniformValues(currentZoom))
+            .concat(paintPropertyBinders.uniformValues(currentZoom, currentProperties));
+    }
+
+    static typename Attributes::Bindings computeAllAttributeBindings(
+        const gl::VertexBuffer<LayoutVertex>& layoutVertexBuffer,
+        const gl::VertexBuffer<SymbolDynamicLayoutAttributes::Vertex>& dynamicLayoutVertexBuffer,
+        const gl::VertexBuffer<SymbolOpacityAttributes::Vertex>& opacityVertexBuffer,
+        const PaintPropertyBinders& paintPropertyBinders,
+        const typename PaintProperties::PossiblyEvaluated& currentProperties) {
+        assert(layoutVertexBuffer.vertexCount == dynamicLayoutVertexBuffer.vertexCount &&
+               layoutVertexBuffer.vertexCount == opacityVertexBuffer.vertexCount);
+        return LayoutAttributes::bindings(layoutVertexBuffer)
+            .concat(SymbolDynamicLayoutAttributes::bindings(dynamicLayoutVertexBuffer))
+            .concat(SymbolOpacityAttributes::bindings(opacityVertexBuffer))
+            .concat(paintPropertyBinders.attributeBindings(currentProperties));
+    }
+
+    static uint32_t activeBindingCount(const typename Attributes::Bindings& allAttributeBindings) {
+        return Attributes::activeBindingCount(allAttributeBindings);
+    }
+
     template <class DrawMode>
     void draw(gl::Context& context,
               DrawMode drawMode,
               gl::DepthMode depthMode,
               gl::StencilMode stencilMode,
               gl::ColorMode colorMode,
-              const UniformValues& uniformValues,
-              const gl::VertexBuffer<LayoutVertex>& layoutVertexBuffer,
-              const gl::VertexBuffer<SymbolDynamicLayoutAttributes::Vertex>& dynamicLayoutVertexBuffer,
-              const gl::VertexBuffer<SymbolOpacityAttributes::Vertex>& opacityVertexBuffer,
-              const SymbolSizeBinder& symbolSizeBinder,
               const gl::IndexBuffer<DrawMode>& indexBuffer,
               const SegmentVector<Attributes>& segments,
-              const PaintPropertyBinders& paintPropertyBinders,
-              const typename PaintProperties::PossiblyEvaluated& currentProperties,
-              float currentZoom,
+              const typename AllUniforms::Values& allUniformValues,
+              const typename Attributes::Bindings& allAttributeBindings,
               const std::string& layerID) {
-        typename AllUniforms::Values allUniformValues = uniformValues
-            .concat(symbolSizeBinder.uniformValues(currentZoom))
-            .concat(paintPropertyBinders.uniformValues(currentZoom, currentProperties));
-
-        typename Attributes::Bindings allAttributeBindings = LayoutAttributes::bindings(layoutVertexBuffer)
-            .concat(SymbolDynamicLayoutAttributes::bindings(dynamicLayoutVertexBuffer))
-            .concat(SymbolOpacityAttributes::bindings(opacityVertexBuffer))
-            .concat(paintPropertyBinders.attributeBindings(currentProperties));
-
-        assert(layoutVertexBuffer.vertexCount == dynamicLayoutVertexBuffer.vertexCount &&
-                layoutVertexBuffer.vertexCount == opacityVertexBuffer.vertexCount);
-
         for (auto& segment : segments) {
             auto vertexArrayIt = segment.vertexArrays.find(layerID);
 
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