Merge pull request #25429 from akien-mga/cleanup-shadercompiler-gles23

Cleanup and identify ShaderCompilerGLES[23] differences

drivers/gles2/shader_compiler_gles2.cpp

@@ -806,9 +806,7 @@ ShaderCompilerGLES2::ShaderCompilerGLES2() {
 	actions[VS::SHADER_CANVAS_ITEM].usage_defines["SCREEN_PIXEL_SIZE"] = "@SCREEN_UV";
 	actions[VS::SHADER_CANVAS_ITEM].usage_defines["NORMAL"] = "#define NORMAL_USED\n";
 	actions[VS::SHADER_CANVAS_ITEM].usage_defines["NORMALMAP"] = "#define NORMALMAP_USED\n";
-	actions[VS::SHADER_CANVAS_ITEM].usage_defines["SHADOW_COLOR"] = "#define SHADOW_COLOR_USED\n";
 	actions[VS::SHADER_CANVAS_ITEM].usage_defines["LIGHT"] = "#define USE_LIGHT_SHADER_CODE\n";
-
 	actions[VS::SHADER_CANVAS_ITEM].render_mode_defines["skip_vertex_transform"] = "#define SKIP_TRANSFORM_USED\n";
 
 	/** SPATIAL SHADER **/
@@ -831,7 +829,6 @@ ShaderCompilerGLES2::ShaderCompilerGLES2() {
 	actions[VS::SHADER_SPATIAL].renames["POINT_SIZE"] = "gl_PointSize";
 	// gl_InstanceID is not available in OpenGL ES 2.0
 	actions[VS::SHADER_SPATIAL].renames["INSTANCE_ID"] = "0";
-	actions[VS::SHADER_SPATIAL].renames["OUTPUT_IS_SRGB"] = "SHADER_IS_SRGB";
 
 	//builtins
 
@@ -863,8 +860,10 @@ ShaderCompilerGLES2::ShaderCompilerGLES2() {
 	actions[VS::SHADER_SPATIAL].renames["SCREEN_UV"] = "screen_uv";
 	actions[VS::SHADER_SPATIAL].renames["SCREEN_TEXTURE"] = "screen_texture";
 	actions[VS::SHADER_SPATIAL].renames["DEPTH_TEXTURE"] = "depth_buffer";
-	actions[VS::SHADER_SPATIAL].renames["SIDE"] = "side";
+	// Defined in GLES3, but not available in GLES2
+	//actions[VS::SHADER_SPATIAL].renames["DEPTH"] = "gl_FragDepth";
 	actions[VS::SHADER_SPATIAL].renames["ALPHA_SCISSOR"] = "alpha_scissor";
+	actions[VS::SHADER_SPATIAL].renames["OUTPUT_IS_SRGB"] = "SHADER_IS_SRGB";
 
 	//for light
 	actions[VS::SHADER_SPATIAL].renames["VIEW"] = "view";
@@ -904,6 +903,12 @@ ShaderCompilerGLES2::ShaderCompilerGLES2() {
 	actions[VS::SHADER_SPATIAL].render_mode_defines["skip_vertex_transform"] = "#define SKIP_TRANSFORM_USED\n";
 	actions[VS::SHADER_SPATIAL].render_mode_defines["world_vertex_coords"] = "#define VERTEX_WORLD_COORDS_USED\n";
 
+	// Defined in GLES3, could be implemented in GLES2 too if there's a need for it
+	//actions[VS::SHADER_SPATIAL].render_mode_defines["ensure_correct_normals"] = "#define ENSURE_CORRECT_NORMALS\n";
+	// Defined in GLES3, might not be possible in GLES2 as gl_FrontFacing is not available
+	//actions[VS::SHADER_SPATIAL].render_mode_defines["cull_front"] = "#define DO_SIDE_CHECK\n";
+	//actions[VS::SHADER_SPATIAL].render_mode_defines["cull_disabled"] = "#define DO_SIDE_CHECK\n";
+
 	bool force_lambert = GLOBAL_GET("rendering/quality/shading/force_lambert_over_burley");
 
 	if (!force_lambert) {
@@ -929,27 +934,7 @@ ShaderCompilerGLES2::ShaderCompilerGLES2() {
 	actions[VS::SHADER_SPATIAL].render_mode_defines["shadows_disabled"] = "#define SHADOWS_DISABLED\n";
 	actions[VS::SHADER_SPATIAL].render_mode_defines["ambient_light_disabled"] = "#define AMBIENT_LIGHT_DISABLED\n";
 
-	/* PARTICLES SHADER */
-
-	actions[VS::SHADER_PARTICLES].renames["COLOR"] = "out_color";
-	actions[VS::SHADER_PARTICLES].renames["VELOCITY"] = "out_velocity_active.xyz";
-	actions[VS::SHADER_PARTICLES].renames["MASS"] = "mass";
-	actions[VS::SHADER_PARTICLES].renames["ACTIVE"] = "shader_active";
-	actions[VS::SHADER_PARTICLES].renames["RESTART"] = "restart";
-	actions[VS::SHADER_PARTICLES].renames["CUSTOM"] = "out_custom";
-	actions[VS::SHADER_PARTICLES].renames["TRANSFORM"] = "xform";
-	actions[VS::SHADER_PARTICLES].renames["TIME"] = "time";
-	actions[VS::SHADER_PARTICLES].renames["LIFETIME"] = "lifetime";
-	actions[VS::SHADER_PARTICLES].renames["DELTA"] = "local_delta";
-	actions[VS::SHADER_PARTICLES].renames["NUMBER"] = "particle_number";
-	actions[VS::SHADER_PARTICLES].renames["INDEX"] = "index";
-	actions[VS::SHADER_PARTICLES].renames["GRAVITY"] = "current_gravity";
-	actions[VS::SHADER_PARTICLES].renames["EMISSION_TRANSFORM"] = "emission_transform";
-	actions[VS::SHADER_PARTICLES].renames["RANDOM_SEED"] = "random_seed";
-
-	actions[VS::SHADER_PARTICLES].render_mode_defines["disable_force"] = "#define DISABLE_FORCE\n";
-	actions[VS::SHADER_PARTICLES].render_mode_defines["disable_velocity"] = "#define DISABLE_VELOCITY\n";
-	actions[VS::SHADER_PARTICLES].render_mode_defines["keep_data"] = "#define ENABLE_KEEP_DATA\n";
+	// No defines for particle shaders in GLES2, there are no GPU particles
 
 	vertex_name = "vertex";
 	fragment_name = "fragment";

drivers/gles3/shader_compiler_gles3.cpp

@@ -963,9 +963,9 @@ ShaderCompilerGLES3::ShaderCompilerGLES3() {
 	actions[VS::SHADER_PARTICLES].renames["EMISSION_TRANSFORM"] = "emission_transform";
 	actions[VS::SHADER_PARTICLES].renames["RANDOM_SEED"] = "random_seed";
 
-	actions[VS::SHADER_SPATIAL].render_mode_defines["disable_force"] = "#define DISABLE_FORCE\n";
-	actions[VS::SHADER_SPATIAL].render_mode_defines["disable_velocity"] = "#define DISABLE_VELOCITY\n";
-	actions[VS::SHADER_SPATIAL].render_mode_defines["keep_data"] = "#define ENABLE_KEEP_DATA\n";
+	actions[VS::SHADER_PARTICLES].render_mode_defines["disable_force"] = "#define DISABLE_FORCE\n";
+	actions[VS::SHADER_PARTICLES].render_mode_defines["disable_velocity"] = "#define DISABLE_VELOCITY\n";
+	actions[VS::SHADER_PARTICLES].render_mode_defines["keep_data"] = "#define ENABLE_KEEP_DATA\n";
 
 	vertex_name = "vertex";
 	fragment_name = "fragment";