Merge pull request #54751 from NHodgesVFX/3.x

drivers/gles2/shader_compiler_gles2.cpp

@@ -1051,6 +1051,8 @@ ShaderCompilerGLES2::ShaderCompilerGLES2() {
 	actions[VS::SHADER_CANVAS_ITEM].renames["SCREEN_PIXEL_SIZE"] = "screen_pixel_size";
 	actions[VS::SHADER_CANVAS_ITEM].renames["FRAGCOORD"] = "gl_FragCoord";
 	actions[VS::SHADER_CANVAS_ITEM].renames["POINT_COORD"] = "gl_PointCoord";
+	actions[VS::SHADER_CANVAS_ITEM].renames["INSTANCE_ID"] = "0";
+	actions[VS::SHADER_CANVAS_ITEM].renames["VERTEX_ID"] = "0";
 
 	actions[VS::SHADER_CANVAS_ITEM].renames["LIGHT_VEC"] = "light_vec";
 	actions[VS::SHADER_CANVAS_ITEM].renames["LIGHT_HEIGHT"] = "light_height";
@@ -1111,8 +1113,9 @@ ShaderCompilerGLES2::ShaderCompilerGLES2() {
 	actions[VS::SHADER_SPATIAL].renames["UV2"] = "uv2_interp";
 	actions[VS::SHADER_SPATIAL].renames["COLOR"] = "color_interp";
 	actions[VS::SHADER_SPATIAL].renames["POINT_SIZE"] = "point_size";
-	// gl_InstanceID is not available in OpenGL ES 2.0
+	// gl_InstanceID and VERTEX_ID is not available in OpenGL ES 2.0
 	actions[VS::SHADER_SPATIAL].renames["INSTANCE_ID"] = "0";
+	actions[VS::SHADER_SPATIAL].renames["VERTEX_ID"] = "0";
 
 	//builtins
 

drivers/gles3/shader_compiler_gles3.cpp

@@ -1128,6 +1128,8 @@ ShaderCompilerGLES3::ShaderCompilerGLES3() {
 	actions[VS::SHADER_CANVAS_ITEM].renames["SCREEN_PIXEL_SIZE"] = "screen_pixel_size";
 	actions[VS::SHADER_CANVAS_ITEM].renames["FRAGCOORD"] = "gl_FragCoord";
 	actions[VS::SHADER_CANVAS_ITEM].renames["POINT_COORD"] = "gl_PointCoord";
+	actions[VS::SHADER_CANVAS_ITEM].renames["INSTANCE_ID"] = "gl_InstanceID";
+	actions[VS::SHADER_CANVAS_ITEM].renames["VERTEX_ID"] = "gl_VertexID";
 
 	actions[VS::SHADER_CANVAS_ITEM].renames["LIGHT_VEC"] = "light_vec";
 	actions[VS::SHADER_CANVAS_ITEM].renames["LIGHT_HEIGHT"] = "light_height";
@@ -1171,6 +1173,7 @@ ShaderCompilerGLES3::ShaderCompilerGLES3() {
 	actions[VS::SHADER_SPATIAL].renames["COLOR"] = "color_interp";
 	actions[VS::SHADER_SPATIAL].renames["POINT_SIZE"] = "point_size";
 	actions[VS::SHADER_SPATIAL].renames["INSTANCE_ID"] = "gl_InstanceID";
+	actions[VS::SHADER_SPATIAL].renames["VERTEX_ID"] = "gl_VertexID";
 
 	//builtins
 

servers/visual/shader_types.cpp

@@ -66,6 +66,7 @@ ShaderTypes::ShaderTypes() {
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["POINT_SIZE"] = ShaderLanguage::TYPE_FLOAT;
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["INSTANCE_ID"] = constt(ShaderLanguage::TYPE_INT);
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["INSTANCE_CUSTOM"] = constt(ShaderLanguage::TYPE_VEC4);
+	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["VERTEX_ID"] = constt(ShaderLanguage::TYPE_INT);
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].built_ins["ROUGHNESS"] = ShaderLanguage::TYPE_FLOAT;
 	shader_modes[VS::SHADER_SPATIAL].functions["vertex"].can_discard = false;
 
@@ -153,7 +154,6 @@ ShaderTypes::ShaderTypes() {
 	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["SPECULAR_LIGHT"] = ShaderLanguage::TYPE_VEC3;
 	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["OUTPUT_IS_SRGB"] = constt(ShaderLanguage::TYPE_BOOL);
 	shader_modes[VS::SHADER_SPATIAL].functions["light"].built_ins["ALPHA"] = ShaderLanguage::TYPE_FLOAT;
-
 	shader_modes[VS::SHADER_SPATIAL].functions["light"].can_discard = true;
 
 	//order used puts first enum mode (default) first
@@ -213,6 +213,8 @@ ShaderTypes::ShaderTypes() {
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["INSTANCE_CUSTOM"] = constt(ShaderLanguage::TYPE_VEC4);
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["AT_LIGHT_PASS"] = constt(ShaderLanguage::TYPE_BOOL);
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["TEXTURE_PIXEL_SIZE"] = constt(ShaderLanguage::TYPE_VEC2);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["INSTANCE_ID"] = constt(ShaderLanguage::TYPE_INT);
+	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].built_ins["VERTEX_ID"] = constt(ShaderLanguage::TYPE_INT);
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["vertex"].can_discard = false;
 
 	shader_modes[VS::SHADER_CANVAS_ITEM].functions["fragment"].built_ins["FRAGCOORD"] = constt(ShaderLanguage::TYPE_VEC4);