5 files changed, 37 insertions, 7 deletions
diff --git a/drivers/gles2/shader_compiler_gles2.cpp b/drivers/gles2/shader_compiler_gles2.cpp
index df7eee2301..630a5ed6c6 100644
--- a/drivers/gles2/shader_compiler_gles2.cpp
+++ b/drivers/gles2/shader_compiler_gles2.cpp
@@ -733,6 +733,17 @@ String ShaderCompilerGLES2::_dump_node_code(SL::Node *p_node, int p_level, Gener
 
 					code += ")";
 
+					if (p_default_actions.usage_defines.has(var_node->name) && !used_name_defines.has(var_node->name)) {
+						String define = p_default_actions.usage_defines[var_node->name];
+
+						if (define.begins_with("@")) {
+							define = p_default_actions.usage_defines[define.substr(1, define.length())];
+						}
+
+						r_gen_code.custom_defines.push_back(define.utf8());
+						used_name_defines.insert(var_node->name);
+					}
+
 				} break;
 
 				case SL::OP_INDEX: {
@@ -917,6 +928,7 @@ ShaderCompilerGLES2::ShaderCompilerGLES2() {
 	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["LIGHT"] = "#define USE_LIGHT_SHADER_CODE\n";
+	actions[VS::SHADER_CANVAS_ITEM].usage_defines["round"] = "#define ROUND_USED\n";
 	actions[VS::SHADER_CANVAS_ITEM].render_mode_defines["skip_vertex_transform"] = "#define SKIP_TRANSFORM_USED\n";
 
 	/** SPATIAL SHADER **/
diff --git a/drivers/gles2/shaders/canvas.glsl b/drivers/gles2/shaders/canvas.glsl
index 0818942b0a..fa0b315e29 100644
--- a/drivers/gles2/shaders/canvas.glsl
+++ b/drivers/gles2/shaders/canvas.glsl
@@ -258,6 +258,8 @@ precision mediump int;
 #endif
 #endif
 
+#include "stdlib.glsl"
+
 uniform sampler2D color_texture; // texunit:-1
 /* clang-format on */
 uniform highp vec2 color_texpixel_size;
@@ -489,8 +491,7 @@ FRAGMENT_SHADER_CODE
 		highp float shadow_attenuation = 0.0;
 
 #ifdef USE_RGBA_SHADOWS
-
-#define SHADOW_DEPTH(m_tex, m_uv) dot(texture2D((m_tex), (m_uv)), vec4(1.0 / (256.0 * 256.0 * 256.0), 1.0 / (256.0 * 256.0), 1.0 / 256.0, 1.0))
+#define SHADOW_DEPTH(m_tex, m_uv) dot(texture2D((m_tex), (m_uv)), vec4(1.0 / (255.0 * 255.0 * 255.0), 1.0 / (255.0 * 255.0), 1.0 / 255.0, 1.0))
 
 #else
 
diff --git a/drivers/gles2/shaders/canvas_shadow.glsl b/drivers/gles2/shaders/canvas_shadow.glsl
index 01b2c59325..dcb43d523f 100644
--- a/drivers/gles2/shaders/canvas_shadow.glsl
+++ b/drivers/gles2/shaders/canvas_shadow.glsl
@@ -47,8 +47,8 @@ void main() {
 
 #ifdef USE_RGBA_SHADOWS
 
-	highp vec4 comp = fract(depth * vec4(256.0 * 256.0 * 256.0, 256.0 * 256.0, 256.0, 1.0));
-	comp -= comp.xxyz * vec4(0.0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0);
+	highp vec4 comp = fract(depth * vec4(255.0 * 255.0 * 255.0, 255.0 * 255.0, 255.0, 1.0));
+	comp -= comp.xxyz * vec4(0.0, 1.0 / 255.0, 1.0 / 255.0, 1.0 / 255.0);
 	gl_FragColor = comp;
 #else
 
diff --git a/drivers/gles2/shaders/scene.glsl b/drivers/gles2/shaders/scene.glsl
index b7f8ec3ce9..534c977a87 100644
--- a/drivers/gles2/shaders/scene.glsl
+++ b/drivers/gles2/shaders/scene.glsl
@@ -1365,7 +1365,7 @@ LIGHT_SHADER_CODE
 
 #ifdef USE_RGBA_SHADOWS
 
-#define SHADOW_DEPTH(m_val) dot(m_val, vec4(1.0 / (256.0 * 256.0 * 256.0), 1.0 / (256.0 * 256.0), 1.0 / 256.0, 1.0))
+#define SHADOW_DEPTH(m_val) dot(m_val, vec4(1.0 / (255.0 * 255.0 * 255.0), 1.0 / (255.0 * 255.0), 1.0 / 255.0, 1.0))
 
 #else
 
@@ -2207,8 +2207,8 @@ FRAGMENT_SHADER_CODE
 #ifdef USE_RGBA_SHADOWS
 
 	highp float depth = ((position_interp.z / position_interp.w) + 1.0) * 0.5 + 0.0; // bias
-	highp vec4 comp = fract(depth * vec4(256.0 * 256.0 * 256.0, 256.0 * 256.0, 256.0, 1.0));
-	comp -= comp.xxyz * vec4(0.0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0);
+	highp vec4 comp = fract(depth * vec4(255.0 * 255.0 * 255.0, 255.0 * 255.0, 255.0, 1.0));
+	comp -= comp.xxyz * vec4(0.0, 1.0 / 255.0, 1.0 / 255.0, 1.0 / 255.0);
 	gl_FragColor = comp;
 
 #endif
diff --git a/drivers/gles2/shaders/stdlib.glsl b/drivers/gles2/shaders/stdlib.glsl
index 3674d70c9f..b9ecfec65e 100644
--- a/drivers/gles2/shaders/stdlib.glsl
+++ b/drivers/gles2/shaders/stdlib.glsl
@@ -35,6 +35,23 @@ highp vec4 texel2DFetch(highp sampler2D tex, ivec2 size, ivec2 coord) {
 
 	return texture2DLod(tex, vec2(x_coord, y_coord), 0.0);
 }
+#ifdef ROUND_USED
+highp float round(highp float x) {
+	return floor(x + 0.5);
+}
+
+highp vec2 round(highp vec2 x) {
+	return floor(x + vec2(0.5));
+}
+
+highp vec3 round(highp vec3 x) {
+	return floor(x + vec3(0.5));
+}
+
+highp vec4 round(highp vec4 x) {
+	return floor(x + vec4(0.5));
+}
+#endif
 
 #ifndef USE_GLES_OVER_GL
 highp mat4 transpose(highp mat4 src) {