Implement tessellation shaders in the shader compiler

[libs/gl.git] / source / glsl / spirv.cpp

diff --git a/source/glsl/spirv.cpp b/source/glsl/spirv.cpp
index 85312bc4edb67760f2e87d0591a0e7499707d114..b2eac3f0fe1925b11cc586e3e3485d19735ca388 100644 (file)
--- a/source/glsl/spirv.cpp
+++ b/source/glsl/spirv.cpp
@@ -187,6 +187,14 @@ SpirVGenerator::BuiltinSemantic SpirVGenerator::get_builtin_semantic(const strin
                return BUILTIN_INVOCATION_ID;
        else if(name=="gl_Layer")
                return BUILTIN_LAYER;
+       else if(name=="gl_TessLevelOuter")
+               return BUILTIN_TESS_LEVEL_OUTER;
+       else if(name=="gl_TessLevelInner")
+               return BUILTIN_TESS_LEVEL_INNER;
+       else if(name=="gl_TessCoord")
+               return BUILTIN_TESS_COORD;
+       else if(name=="gl_PatchVerticesIn")
+               return BUILTIN_PATCH_VERTICES;
        else if(name=="gl_FragCoord")
                return BUILTIN_FRAG_COORD;
        else if(name=="gl_PointCoord")
@@ -1775,6 +1783,8 @@ void SpirVGenerator::visit(VariableDeclaration &var)
                        writer.write_op_decorate(var_id, DECO_FLAT);
                if(var.sampling=="centroid")
                        writer.write_op_decorate(var_id, DECO_CENTROID);
+               if(var.sampling=="patch")
+                       writer.write_op_decorate(var_id, DECO_PATCH);
 
                if(init_id && current_function)
                {
@@ -1793,6 +1803,8 @@ void SpirVGenerator::visit_entry_point(FunctionDeclaration &func, Id func_id)
        switch(stage->type)
        {
        case Stage::VERTEX: writer.write(0); break;
+       case Stage::TESS_CONTROL: writer.write(1); break;
+       case Stage::TESS_EVAL: writer.write(2); break;
        case Stage::GEOMETRY: writer.write(3); break;
        case Stage::FRAGMENT: writer.write(4); break;
        case Stage::COMPUTE: writer.write(5); break;
@@ -1819,6 +1831,10 @@ void SpirVGenerator::visit_entry_point(FunctionDeclaration &func, Id func_id)
                use_capability(CAP_GEOMETRY);
                writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INVOCATIONS, 1);
        }
+       else if(stage->type==Stage::TESS_CONTROL || stage->type==Stage::TESS_EVAL)
+       {
+               use_capability(CAP_TESSELLATION);
+       }
 
        unsigned local_size[3] = { 0, 1, 1 };
 
@@ -1837,12 +1853,26 @@ void SpirVGenerator::visit_entry_point(FunctionDeclaration &func, Id func_id)
                                writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_TRIANGLES);
                        else if(q.name=="triangles_adjacency")
                                writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_INPUT_TRIANGLES_ADJACENCY);
+                       else if(q.name=="quads")
+                               writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_QUADS);
+                       else if(q.name=="isolines")
+                               writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_ISOLINES);
                        else if(q.name=="line_strip")
                                writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_LINE_STRIP);
                        else if(q.name=="triangle_strip")
                                writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_TRIANGLE_STRIP);
-                       else if(q.name=="max_vertices")
+                       else if(q.name=="max_vertices" || q.name=="vertices")
                                writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_OUTPUT_VERTICES, q.value);
+                       else if(q.name=="cw")
+                               writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_VERTEX_ORDER_CW);
+                       else if(q.name=="ccw")
+                               writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_VERTEX_ORDER_CCW);
+                       else if(q.name=="equal_spacing")
+                               writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_SPACING_EQUAL);
+                       else if(q.name=="fractional_even_spacing")
+                               writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_SPACING_FRACTIONAL_EVEN);
+                       else if(q.name=="fractional_odd_spacing")
+                               writer.write_op(content.exec_modes, OP_EXECUTION_MODE, func_id, EXEC_SPACING_FRACTIONAL_ODD);
                        else if(q.name=="local_size_x")
                                local_size[0] = q.value;
                        else if(q.name=="local_size_y")