From 5422dcf1646078305067b63b1bda0c2344490682 Mon Sep 17 00:00:00 2001
From: Swung0x48 <swung0x48@outlook.com>
Date: Wed, 13 Aug 2025 23:15:05 +0800
Subject: [PATCH] [Test] (MG_Test/Program): add simple integration test for
 shader/program state machine

---
 MobileGL/MG_Test/Program/ProgramTest.cpp | 96 ++++++++++++++++++++++++
 1 file changed, 96 insertions(+)

diff --git a/MobileGL/MG_Test/Program/ProgramTest.cpp b/MobileGL/MG_Test/Program/ProgramTest.cpp
index 80831e8c..a2971edc 100644
--- a/MobileGL/MG_Test/Program/ProgramTest.cpp
+++ b/MobileGL/MG_Test/Program/ProgramTest.cpp
@@ -1,12 +1,108 @@
 #include <gtest/gtest.h>
 #include "Includes.h"
+#include "MG_Impl/GLImpl/Program/GL_Program.h"
+#include "MG_State/GLState/Core.h"
 
 using namespace MobileGL;
+using namespace MobileGL::MG_Impl::GLImpl;
 
 class ProgramTest : public ::testing::Test {
 protected:
+    ProgramTest() {
+        mGLContext = MakeUnique<MG_State::GLState::GLContext>();
+        MG_State::pGLContext = mGLContext.get();
+    }
+private:
+    UniquePtr<MG_State::GLState::GLContext> mGLContext;
 };
 
 TEST_F(ProgramTest, Sanity) {
     ASSERT_TRUE(true);
 }
+
+const char* vsSrc = R"(#version 460
+
+in vec4 Position;
+
+layout(location = 0) uniform mat4 ProjMat;
+uniform vec2 InSize;
+uniform vec2 OutSize;
+
+out vec2 texCoord;
+out vec2 oneTexel;
+
+void main(){
+    vec4 outPos = ProjMat * vec4(Position.xy, 0.0, 1.0);
+    gl_Position = vec4(outPos.xy, 0.2, 1.0);
+
+    oneTexel = 1.0 / InSize;
+
+    texCoord = Position.xy / OutSize;
+})";
+
+const char* fsSrc = R"(#version 460
+
+uniform sampler2D InSampler;
+
+in vec2 texCoord;
+in vec2 oneTexel;
+
+uniform vec2 InSize;
+
+layout(location = 1) uniform vec3 Gray;
+uniform vec3 RedMatrix;
+uniform vec3 GreenMatrix;
+uniform vec3 BlueMatrix;
+uniform vec3 Offset;
+uniform vec3 ColorScale;
+layout(location = 6) uniform float Saturation;
+
+out vec4 fragColor;
+
+void main() {
+    vec4 InTexel = texture(InSampler, texCoord);
+
+    // Color Matrix
+    float RedValue = dot(InTexel.rgb, RedMatrix);
+    float GreenValue = dot(InTexel.rgb, GreenMatrix);
+    float BlueValue = dot(InTexel.rgb, BlueMatrix);
+    vec3 OutColor = vec3(RedValue, GreenValue, BlueValue);
+
+    // Offset & Scale
+    OutColor = (OutColor * ColorScale) + Offset;
+
+    // Saturation
+    float Luma = dot(OutColor, Gray);
+    vec3 Chroma = OutColor - Luma;
+    OutColor = (Chroma * Saturation) + Luma;
+
+    fragColor = vec4(OutColor, 1.0);
+})";
+
+
+TEST_F(ProgramTest, CompileVertex) {
+    GLuint vs = CreateShader(GL_VERTEX_SHADER);
+    ShaderSource(vs, 1, &vsSrc, NULL);
+    CompileShader(vs);
+}
+
+TEST_F(ProgramTest, CompileFragment) {
+    GLuint fs = CreateShader(GL_FRAGMENT_SHADER);
+    ShaderSource(fs, 1, &fsSrc, NULL);
+    CompileShader(fs);
+}
+
+TEST_F(ProgramTest, CompileAndLink) {
+    GLuint vs = CreateShader(GL_VERTEX_SHADER);
+    ShaderSource(vs, 1, &vsSrc, NULL);
+    CompileShader(vs);
+
+    GLuint fs = CreateShader(GL_FRAGMENT_SHADER);
+    ShaderSource(fs, 1, &fsSrc, NULL);
+    CompileShader(fs);
+
+    GLuint program = CreateProgram();
+    AttachShader(program, vs);
+    AttachShader(program, fs);
+    LinkProgram(program);
+}