From 973b68f396d1de99342d17901f33c76d2ce69059 Mon Sep 17 00:00:00 2001
From: Juan Linietsky <reduzio@gmail.com>
Date: Fri, 25 Jan 2019 19:28:27 -0300
Subject: Properly dispose of custom shaders, closes #19300

---
 drivers/gles2/shader_gles2.cpp | 30 +++++++++++++++++++++++++++++-
 drivers/gles2/shader_gles2.h   |  1 +
 2 files changed, 30 insertions(+), 1 deletion(-)

(limited to 'drivers/gles2')

diff --git a/drivers/gles2/shader_gles2.cpp b/drivers/gles2/shader_gles2.cpp
index b50da3e9fe..3bf5baec14 100644
--- a/drivers/gles2/shader_gles2.cpp
+++ b/drivers/gles2/shader_gles2.cpp
@@ -229,6 +229,7 @@ ShaderGLES2::Version *ShaderGLES2::get_current_version() {
 			glDeleteShader(v.vert_id);
 			glDeleteShader(v.frag_id);
 			glDeleteProgram(v.id);
+			memdelete_arr(v.uniform_location);
 			v.id = 0;
 		}
 	}
@@ -328,6 +329,7 @@ ShaderGLES2::Version *ShaderGLES2::get_current_version() {
 		if (iloglen < 0) {
 			glDeleteShader(v.vert_id);
 			glDeleteProgram(v.id);
+			memdelete_arr(v.uniform_location);
 			v.id = 0;
 
 			ERR_PRINT("No OpenGL vertex shader compiler log. What the frick?");
@@ -349,6 +351,7 @@ ShaderGLES2::Version *ShaderGLES2::get_current_version() {
 			Memory::free_static(ilogmem);
 			glDeleteShader(v.vert_id);
 			glDeleteProgram(v.id);
+			memdelete_arr(v.uniform_location);
 			v.id = 0;
 		}
 
@@ -403,6 +406,7 @@ ShaderGLES2::Version *ShaderGLES2::get_current_version() {
 			glDeleteShader(v.frag_id);
 			glDeleteShader(v.vert_id);
 			glDeleteProgram(v.id);
+			memdelete_arr(v.uniform_location);
 			v.id = 0;
 
 			ERR_PRINT("No OpenGL fragment shader compiler log. What the frick?");
@@ -425,6 +429,7 @@ ShaderGLES2::Version *ShaderGLES2::get_current_version() {
 			glDeleteShader(v.frag_id);
 			glDeleteShader(v.vert_id);
 			glDeleteProgram(v.id);
+			memdelete_arr(v.uniform_location);
 			v.id = 0;
 		}
 
@@ -452,6 +457,7 @@ ShaderGLES2::Version *ShaderGLES2::get_current_version() {
 			glDeleteShader(v.frag_id);
 			glDeleteShader(v.vert_id);
 			glDeleteProgram(v.id);
+			memdelete_arr(v.uniform_location);
 			v.id = 0;
 
 			ERR_PRINT("No OpenGL program link log. What the frick?");
@@ -476,6 +482,7 @@ ShaderGLES2::Version *ShaderGLES2::get_current_version() {
 		glDeleteShader(v.frag_id);
 		glDeleteShader(v.vert_id);
 		glDeleteProgram(v.id);
+		memdelete_arr(v.uniform_location);
 		v.id = 0;
 
 		ERR_FAIL_V(NULL);
@@ -519,6 +526,10 @@ ShaderGLES2::Version *ShaderGLES2::get_current_version() {
 	glUseProgram(0);
 	v.ok = true;
 
+	if (cc) {
+		cc->versions.insert(conditional_version.version);
+	}
+
 	return &v;
 }
 
@@ -683,9 +694,26 @@ void ShaderGLES2::set_custom_shader(uint32_t p_code_id) {
 }
 
 void ShaderGLES2::free_custom_shader(uint32_t p_code_id) {
+
 	ERR_FAIL_COND(!custom_code_map.has(p_code_id));
 	if (conditional_version.code_version == p_code_id)
-		conditional_version.code_version = 0;
+		conditional_version.code_version = 0; //do not keep using a version that is going away
+
+	VersionKey key;
+	key.code_version = p_code_id;
+	for (Set<uint32_t>::Element *E = custom_code_map[p_code_id].versions.front(); E; E = E->next()) {
+		key.version = E->get();
+		ERR_CONTINUE(!version_map.has(key));
+		Version &v = version_map[key];
+
+		glDeleteShader(v.vert_id);
+		glDeleteShader(v.frag_id);
+		glDeleteProgram(v.id);
+		memdelete_arr(v.uniform_location);
+		v.id = 0;
+
+		version_map.erase(key);
+	}
 
 	custom_code_map.erase(p_code_id);
 }
diff --git a/drivers/gles2/shader_gles2.h b/drivers/gles2/shader_gles2.h
index 5805432d09..d493880d0b 100644
--- a/drivers/gles2/shader_gles2.h
+++ b/drivers/gles2/shader_gles2.h
@@ -104,6 +104,7 @@ private:
 		Vector<StringName> texture_uniforms;
 		Vector<StringName> custom_uniforms;
 		Vector<CharString> custom_defines;
+		Set<uint32_t> versions;
 	};
 
 	struct Version {
-- 
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