From 056d4560f72a9ec281f8df31aa2a7d8241d6adf1 Mon Sep 17 00:00:00 2001
From: mattkae <mattkae@protonmail.com>
Date: Sun, 13 Aug 2023 16:02:22 -0400
Subject: Generating a cpp file for shaders

---
 themes/src/Renderer2d.cpp              | 24 ++++--------------------
 themes/src/Renderer2d.h                |  2 ++
 themes/src/_shaders/renderer2d.frag    |  5 +++++
 themes/src/_shaders/renderer2d.vert    | 13 +++++++++++++
 themes/src/shaders/renderer2d_frag.cpp |  8 ++++++++
 themes/src/shaders/renderer2d_frag.h   |  2 +-
 themes/src/shaders/renderer2d_vert.cpp | 16 ++++++++++++++++
 themes/src/shaders/renderer2d_vert.h   |  2 +-
 themes/src/shaders/renderer3d_frag.cpp | 10 ++++++++++
 themes/src/shaders/renderer3d_frag.h   |  9 +--------
 themes/src/shaders/renderer3d_vert.cpp | 18 ++++++++++++++++++
 themes/src/shaders/renderer3d_vert.h   | 17 +----------------
 themes/src/shaders/sun_vert.cpp        |  3 +++
 themes/src/shaders/sun_vert.h          |  2 +-
 themes/src/tools/shader.js             | 23 +++++++++++++++--------
 15 files changed, 99 insertions(+), 55 deletions(-)
 create mode 100644 themes/src/shaders/renderer2d_frag.cpp
 create mode 100644 themes/src/shaders/renderer2d_vert.cpp
 create mode 100644 themes/src/shaders/renderer3d_frag.cpp
 create mode 100644 themes/src/shaders/renderer3d_vert.cpp
 create mode 100644 themes/src/shaders/sun_vert.cpp

(limited to 'themes/src')

diff --git a/themes/src/Renderer2d.cpp b/themes/src/Renderer2d.cpp
index 06f0838..196ef7e 100644
--- a/themes/src/Renderer2d.cpp
+++ b/themes/src/Renderer2d.cpp
@@ -3,31 +3,15 @@
 #include "WebglContext.h"
 #include "mathlib.h"
 #include <cstdio>
+#include "shaders/renderer2d_vert.h"
+#include "shaders/renderer2d_frag.h"
 
 // Note: In the 'transform' attribute, the transform.x is the scale,
 // transform.y is the rotation, and transform.zw is the translation.
-const char* DEFAULT_VERTEX_SHADER = 
-"attribute vec2 position; \n"
-"attribute vec4 color; \n"
-"attribute mat4 vMatrix; \n"
-"uniform mat4 projection; \n"
-"uniform mat4 model; \n"
-"varying lowp vec4 VertexColor; \n"
-"void main() { \n"
-"    vec4 fragmentPosition = projection * model * vMatrix * vec4(position.x, position.y, 0, 1); \n"
-"    gl_Position = fragmentPosition; \n"
-"    VertexColor = color; \n"
-"}";
-
-const char* DEFAULT_FRAGMENT_SHADER = 
-"varying lowp vec4 VertexColor; \n"
-"void main() { \n"
-"    gl_FragColor = VertexColor; \n"
-"}";
 
 void Renderer2d::load(WebglContext* inContext, const char* inVertexShader, const char* inFragmentShader) {
-    auto vertexShader = inVertexShader ? inVertexShader : DEFAULT_VERTEX_SHADER;
-    auto fragmentShader = inFragmentShader ? inFragmentShader : DEFAULT_FRAGMENT_SHADER;
+    auto vertexShader = inVertexShader ? inVertexShader : shader_renderer2d_vert;
+    auto fragmentShader = inFragmentShader ? inFragmentShader : shader_renderer2d_frag;
 	context = inContext;
 	printf("Compiling Renderer2d shader...\n");
 	shader = loadShader(vertexShader, fragmentShader);
diff --git a/themes/src/Renderer2d.h b/themes/src/Renderer2d.h
index 8a96503..56b79fc 100644
--- a/themes/src/Renderer2d.h
+++ b/themes/src/Renderer2d.h
@@ -17,6 +17,8 @@ struct Renderer2d {
 	struct {
 		i32 position;
 		i32 color;
+
+        // TODO: vMatrix is not standard and does not belong here
 		i32 vMatrix;
 	} attributes;
 
diff --git a/themes/src/_shaders/renderer2d.frag b/themes/src/_shaders/renderer2d.frag
index e69de29..8463e06 100644
--- a/themes/src/_shaders/renderer2d.frag
+++ b/themes/src/_shaders/renderer2d.frag
@@ -0,0 +1,5 @@
+varying lowp vec4 VertexColor;
+
+void main() {
+    gl_FragColor = VertexColor;
+}
diff --git a/themes/src/_shaders/renderer2d.vert b/themes/src/_shaders/renderer2d.vert
index e69de29..76150f0 100644
--- a/themes/src/_shaders/renderer2d.vert
+++ b/themes/src/_shaders/renderer2d.vert
@@ -0,0 +1,13 @@
+
+attribute vec2 position; 
+attribute vec4 color; 
+attribute mat4 vMatrix; 
+uniform mat4 projection; 
+uniform mat4 model; 
+varying lowp vec4 VertexColor;
+
+void main() { 
+    vec4 fragmentPosition = projection * model * vMatrix * vec4(position.x, position.y, 0, 1); 
+    gl_Position = fragmentPosition; 
+    VertexColor = color; 
+}
diff --git a/themes/src/shaders/renderer2d_frag.cpp b/themes/src/shaders/renderer2d_frag.cpp
new file mode 100644
index 0000000..7650fce
--- /dev/null
+++ b/themes/src/shaders/renderer2d_frag.cpp
@@ -0,0 +1,8 @@
+#include "renderer2d_frag.h"
+
+const char* shader_renderer2d_frag = "varying lowp vec4 VertexColor; \n"
+" \n"
+"void main() { \n"
+"    gl_FragColor = VertexColor; \n"
+"} \n"
+" \n";
diff --git a/themes/src/shaders/renderer2d_frag.h b/themes/src/shaders/renderer2d_frag.h
index 6f5e472..20cff24 100644
--- a/themes/src/shaders/renderer2d_frag.h
+++ b/themes/src/shaders/renderer2d_frag.h
@@ -1,4 +1,4 @@
 #ifndef SHADER_RENDERER2D_FRAG 
 #define SHADER_RENDERER2D_FRAG 
-const char* shader_renderer2d_frag = " \n";
+extern const char* shader_renderer2d_frag;
 #endif
diff --git a/themes/src/shaders/renderer2d_vert.cpp b/themes/src/shaders/renderer2d_vert.cpp
new file mode 100644
index 0000000..9b4182e
--- /dev/null
+++ b/themes/src/shaders/renderer2d_vert.cpp
@@ -0,0 +1,16 @@
+#include "renderer2d_vert.h"
+
+const char* shader_renderer2d_vert = " \n"
+"attribute vec2 position;  \n"
+"attribute vec4 color;  \n"
+"attribute mat4 vMatrix;  \n"
+"uniform mat4 projection;  \n"
+"uniform mat4 model;  \n"
+"varying lowp vec4 VertexColor; \n"
+" \n"
+"void main() {  \n"
+"    vec4 fragmentPosition = projection * model * vMatrix * vec4(position.x, position.y, 0, 1);  \n"
+"    gl_Position = fragmentPosition;  \n"
+"    VertexColor = color;  \n"
+"} \n"
+" \n";
diff --git a/themes/src/shaders/renderer2d_vert.h b/themes/src/shaders/renderer2d_vert.h
index b32cf9f..cfd09c5 100644
--- a/themes/src/shaders/renderer2d_vert.h
+++ b/themes/src/shaders/renderer2d_vert.h
@@ -1,4 +1,4 @@
 #ifndef SHADER_RENDERER2D_VERT 
 #define SHADER_RENDERER2D_VERT 
-const char* shader_renderer2d_vert = " \n";
+extern const char* shader_renderer2d_vert;
 #endif
diff --git a/themes/src/shaders/renderer3d_frag.cpp b/themes/src/shaders/renderer3d_frag.cpp
new file mode 100644
index 0000000..a83f2e6
--- /dev/null
+++ b/themes/src/shaders/renderer3d_frag.cpp
@@ -0,0 +1,10 @@
+#include "renderer3d_frag.h"
+
+const char* shader_renderer3d_frag = "varying lowp vec4 VertexColor; \n"
+"varying lowp vec4 VertexNormal; \n"
+" \n"
+"void main() { \n"
+"    const lowp vec3 lightDirection = vec3(0.0, 1.0, 0.0); \n"
+"    gl_FragColor = vec4(VertexColor.xyz * dot(VertexNormal.xyz, lightDirection), 1); \n"
+"} \n"
+" \n";
diff --git a/themes/src/shaders/renderer3d_frag.h b/themes/src/shaders/renderer3d_frag.h
index 6b3a936..25f1fdf 100644
--- a/themes/src/shaders/renderer3d_frag.h
+++ b/themes/src/shaders/renderer3d_frag.h
@@ -1,11 +1,4 @@
 #ifndef SHADER_RENDERER3D_FRAG 
 #define SHADER_RENDERER3D_FRAG 
-const char* shader_renderer3d_frag = "varying lowp vec4 VertexColor; \n"
-"varying lowp vec4 VertexNormal; \n"
-" \n"
-"void main() { \n"
-"    const lowp vec3 lightDirection = vec3(0.0, 1.0, 0.0); \n"
-"    gl_FragColor = vec4(VertexColor.xyz * dot(VertexNormal.xyz, lightDirection), 1); \n"
-"} \n"
-" \n";
+extern const char* shader_renderer3d_frag;
 #endif
diff --git a/themes/src/shaders/renderer3d_vert.cpp b/themes/src/shaders/renderer3d_vert.cpp
new file mode 100644
index 0000000..083a69d
--- /dev/null
+++ b/themes/src/shaders/renderer3d_vert.cpp
@@ -0,0 +1,18 @@
+#include "renderer3d_vert.h"
+
+const char* shader_renderer3d_vert = "attribute vec4 position; \n"
+"attribute vec4 color; \n"
+"attribute vec4 normal; \n"
+"uniform mat4 projection; \n"
+"uniform mat4 view; \n"
+"uniform mat4 model; \n"
+"varying lowp vec4 VertexColor; \n"
+"varying lowp vec4 VertexNormal; \n"
+" \n"
+"void main() { \n"
+"    vec4 fragmentPosition = projection * view * model * position; \n"
+"    gl_Position = fragmentPosition; \n"
+"    VertexColor = color; \n"
+"    VertexNormal = normal; \n"
+"} \n"
+" \n";
diff --git a/themes/src/shaders/renderer3d_vert.h b/themes/src/shaders/renderer3d_vert.h
index 20e69f9..760cad5 100644
--- a/themes/src/shaders/renderer3d_vert.h
+++ b/themes/src/shaders/renderer3d_vert.h
@@ -1,19 +1,4 @@
 #ifndef SHADER_RENDERER3D_VERT 
 #define SHADER_RENDERER3D_VERT 
-const char* shader_renderer3d_vert = "attribute vec4 position; \n"
-"attribute vec4 color; \n"
-"attribute vec4 normal; \n"
-"uniform mat4 projection; \n"
-"uniform mat4 view; \n"
-"uniform mat4 model; \n"
-"varying lowp vec4 VertexColor; \n"
-"varying lowp vec4 VertexNormal; \n"
-" \n"
-"void main() { \n"
-"    vec4 fragmentPosition = projection * view * model * position; \n"
-"    gl_Position = fragmentPosition; \n"
-"    VertexColor = color; \n"
-"    VertexNormal = normal; \n"
-"} \n"
-" \n";
+extern const char* shader_renderer3d_vert;
 #endif
diff --git a/themes/src/shaders/sun_vert.cpp b/themes/src/shaders/sun_vert.cpp
new file mode 100644
index 0000000..0049bfd
--- /dev/null
+++ b/themes/src/shaders/sun_vert.cpp
@@ -0,0 +1,3 @@
+#include "sun_vert.h"
+
+const char* shader_sun_vert = " \n";
diff --git a/themes/src/shaders/sun_vert.h b/themes/src/shaders/sun_vert.h
index 2f9bf69..9c95b49 100644
--- a/themes/src/shaders/sun_vert.h
+++ b/themes/src/shaders/sun_vert.h
@@ -1,4 +1,4 @@
 #ifndef SHADER_SUN_VERT 
 #define SHADER_SUN_VERT 
-const char* shader_sun_vert = " \n";
+extern const char* shader_sun_vert;
 #endif
diff --git a/themes/src/tools/shader.js b/themes/src/tools/shader.js
index 27c8682..54ba6e0 100644
--- a/themes/src/tools/shader.js
+++ b/themes/src/tools/shader.js
@@ -15,16 +15,23 @@ files.forEach(file => {
   const splitText = text.split('\n');
   const splitName = file.split('.');
   const def = `SHADER_${splitName.join('_').toUpperCase()}`;
-  let result = `#ifndef ${def} \n`;
-  result += `#define ${def} \n`;
-  result += `const char* ${def.toLowerCase()} = `
+  let header_result = `#ifndef ${def} \n`;
+  const filename = splitName.join('_');
+  const header_name = filename + ".h";
+  const cpp_name = filename + ".cpp";
+  header_result += `#define ${def} \n`;
+  header_result += `extern const char* ${def.toLowerCase()};\n`;
+  header_result += '#endif\n';
+  fs.writeFileSync(path.join(out_directory, header_name), header_result);
+  
+  let cpp_result = `#include "${header_name}"\n\n`
+  cpp_result += `const char* ${def.toLowerCase()} = `
   splitText.forEach((line, index) => {
-    result += "\"" + line + " \\n\"";
+    cpp_result += "\"" + line + " \\n\"";
     if (index == splitText.length - 1)
-      result += ";\n";
+      cpp_result += ";\n";
     else
-      result += "\n";
+      cpp_result += "\n";
   });
-  result += '#endif\n';
-  fs.writeFileSync(path.join(out_directory, splitName.join('_') + '.h'), result);
+  fs.writeFileSync(path.join(out_directory,  cpp_name), cpp_result);
 });
-- 
cgit v1.2.1