From f695d0bb394363ee6884fff898773ff024c1a6c2 Mon Sep 17 00:00:00 2001
From: Luca Conte <main@lugico.de>
Date: Tue, 22 Apr 2025 19:54:52 +0200
Subject: [PATCH] add helper function for building programs

---
 src/main.c   | 24 ++----------------------
 src/shader.c | 25 ++++++++++++++++++++++++-
 src/shader.h |  1 +
 3 files changed, 27 insertions(+), 23 deletions(-)

diff --git a/src/main.c b/src/main.c
index 1648016..d7f8ac4 100644
--- a/src/main.c
+++ b/src/main.c
@@ -89,28 +89,8 @@ void recalculateProjectionMatrix() {
 
 void init(void) {
 
-	INFO("Compiling Shaders...");
-
-	// create and compile vertex shader
-	INFO("Compiling Vertex Shader...");
-	ShaderCompileResult vertexShader = readAndCompileShaderFromFile("src/shaders/vertex.glsl", GL_VERTEX_SHADER);
-
-	if (!vertexShader.success) {
-		FATAL("Failed to compile Vertex Shader");
-		exit(1);
-	}
-
-	// create and compile fragment shader
-	INFO("Compiling Fragment Shader...");
-	ShaderCompileResult fragmentShader = readAndCompileShaderFromFile("src/shaders/fragment.glsl", GL_FRAGMENT_SHADER);
-	if (!fragmentShader.success) {
-		FATAL("Failed to compile Fragment Shader");
-		exit(1);
-	}
-
-	// create and link shader program
-	INFO("Linking Shader Program...");
-	ProgramLinkResult linkResult = linkShaderProgram(vertexShader.shader, fragmentShader.shader);
+	INFO("Building Programs...");
+	ProgramLinkResult linkResult = buildShaderProgram("src/shaders/vertex.glsl", "src/shaders/fragment.glsl");
 	if (!linkResult.success) {
 		FATAL("Failed to link Program");
 		exit(1);
diff --git a/src/shader.c b/src/shader.c
index 2154b99..6ff19ab 100644
--- a/src/shader.c
+++ b/src/shader.c
@@ -116,4 +116,27 @@ ProgramLinkResult linkShaderProgram(GLuint vertexShader, GLuint fragmentShader)
 
 	result.success = true;
 	return result;
-}
\ No newline at end of file
+}
+
+ProgramLinkResult buildShaderProgram(const char* vertexShaderPath, const char* fragmentShaderPath) {
+	ProgramLinkResult result = { .success = false, .program = 0 };
+
+	ShaderCompileResult vertexShader = readAndCompileShaderFromFile(vertexShaderPath, GL_VERTEX_SHADER);
+	if (!vertexShader.success) {
+		FATAL("Failed to compile vertex shader");
+		return result;
+	}
+
+	ShaderCompileResult fragmentShader = readAndCompileShaderFromFile(fragmentShaderPath, GL_FRAGMENT_SHADER);
+	if (!fragmentShader.success) {
+		FATAL("Failed to compile fragment shader");
+		return result;
+	}
+
+	result = linkShaderProgram(vertexShader.shader, fragmentShader.shader);
+
+	glDeleteShader(vertexShader.shader);
+	glDeleteShader(fragmentShader.shader);
+
+	return result;
+}
diff --git a/src/shader.h b/src/shader.h
index a541b32..a2ac3f3 100644
--- a/src/shader.h
+++ b/src/shader.h
@@ -17,5 +17,6 @@ typedef struct {
 extern const char* readFileToMemory(const char* filepath);
 extern ShaderCompileResult readAndCompileShaderFromFile(const char* filepath, GLenum shaderType);
 extern ProgramLinkResult linkShaderProgram(GLuint vertexShader, GLuint fragmentShader);
+extern ProgramLinkResult buildShaderProgram(const char* vertexShaderPath, const char* fragmentShaderPath);
 
 #endif // SHADER_H
\ No newline at end of file