Add glsl generation code for uniform buffer format

--HG--
branch : opengl3

code/nel/src/3d/driver/opengl3/driver_opengl_uniform_buffer.cpp

@@ -17,6 +17,8 @@
 #include "driver_opengl.h"
 #include "driver_opengl_uniform_buffer.h"
 
+#include <sstream>
+
 #include <nel/misc/debug.h>
 
 namespace NL3D {
@@ -32,6 +34,71 @@ const char *GLSLHeaderUniformBuffer =
 	"#define NL_USER_PIXEL_PROGRAM_BIND " NL_MACRO_TO_STR(NL_USER_PIXEL_PROGRAM_BIND) "\n"
 	"#define NL_USER_MATERIAL_BIND " NL_MACRO_TO_STR(NL_USER_MATERIAL_BIND) "\n";
 
+static const char *s_UniformBufferBindDefine[] = {
+	"NL_BUILTIN_CAMERA_BIND",
+	"NL_BUILTIN_MODEL_BIND",
+	"NL_BUILTIN_MATERIAL_BIND",
+	"NL_USER_ENV_BIND",
+	"NL_USER_VERTEX_PROGRAM_BIND",
+	"NL_USER_GEOMETRY_PROGRAM_BIND",
+	"NL_USER_PIXEL_PROGRAM_BIND",
+	"NL_USER_MATERIAL_BIND",
+};
+
+static const char *s_UniformBufferName[] = {
+	"BuiltinCamera",
+	"BuiltinModel",
+	"BuiltinMaterial",
+	"UserEnv",
+	"UserLocal", // Yes, there can only be one per stage here, as these are bound to the stage
+	"UserLocal",
+	"UserLocal",
+	"UserMaterial",
+};
+
+static const char *s_TypeKeyword[] = {
+	"float", // float
+	"vec2", // CVector2D
+	"vec3",
+	"vec4", // CVector
+	"int", // sint32
+	"ivec2",
+	"ivec3",
+	"ivec3",
+	"unsigned int", // uint32
+	"uvec2",
+	"uvec3",
+	"uvec4",
+	"bool",
+	"bvec2",
+	"bvec3",
+	"bvec4",
+	"mat2",
+	"mat3",
+	"mat4", // CMatrix
+	"mat2x3",
+	"mat2x4",
+	"mat3x2",
+	"mat3x4",
+	"mat4x2",
+	"mat4x3",
+};
+
+void generateUniformBufferGLSL(std::stringstream &ss, const CUniformBufferFormat &ubf, sint binding)
+{
+	ss << "layout(std140, binding = " << s_UniformBufferBindDefine[binding] << ") uniform " << s_UniformBufferName[binding] << "\n";
+	ss << "{\n";
+	for (sint i = 0; i < ubf.size(); ++i)
+	{
+		const CUniformBufferFormat::CEntry &entry = ubf.get(i);
+		ss << "\t" << s_TypeKeyword[entry.Type] << " " << NLMISC::CStringMapper::unmap(entry.Name);
+		if (entry.Count != 1)
+			ss << "[" << entry.Count << "]";
+		ss << ";\n";
+	}
+	ss << "}\n";
+}
+
 } // NLDRIVERGL3
 } // NL3D
 

code/nel/src/3d/driver/opengl3/driver_opengl_uniform_buffer.h

@@ -23,6 +23,10 @@ namespace NL3D {
 namespace NLDRIVERGL3 {
 
 // NOTE: It is completely safe to reorder these indices.
+// When changing, update:
+//     - GLSLHeaderUniformBuffer
+//     - s_UniformBufferBindDefine
+//     - s_UniformBufferBindName
 // Always use the defines.
 #define NL_BUILTIN_CAMERA_BIND 0 // Builtin uniform buffer bound by driver, set by camera transformation
 #define NL_BUILTIN_MODEL_BIND 1 // Builtin uniform buffer bound by driver, set by model transformation
@@ -46,6 +50,10 @@ namespace NL3D {
 class CUniformBufferFormat
 {
 public:
+	// When changing, update
+	//     - s_TypeAlignment
+	//     - s_TypeSize
+	//     - NL3D::NLDRIVERGL3::s_TypeKeyword
 	enum TType
 	{
 		Float, // float
@@ -82,13 +90,13 @@ public:
 		sint Offset;
 		sint Count;
 
-		inline sint stride()
+		inline sint stride() const
 		{
 			return Count == 1
 				? s_TypeSize[Type]
 				: ((s_TypeSize[Type] + 15) & ~0xF);
 		}
-		inline sint size()
+		inline sint size() const
 		{
 			return stride() * Count;
 		}
@@ -114,11 +122,12 @@ public:
 		entry.Type = type;
 		entry.Offset = alignOffset;
 		entry.Count = count;
-		return baseOffset;
+		return alignOffset;
 	}
 
-	inline const CEntry *get() { return &m_Entries[0]; }
-	inline size_t size() { return m_Entries.size(); }
+	inline const CEntry &get(sint i) const { return m_Entries[i]; }
+	inline size_t size() const { return m_Entries.size(); }
+	inline void clear() { m_Entries.clear(); }
 	
 private:
 	static const sint s_TypeAlignment[];