Initial

shaders/fragment.glsl

@@ -0,0 +1,26 @@
+#version 130
+out mediump vec4 color;
+in mediump vec2 texcoord;
+uniform sampler2D tex;
+uniform vec2 cursorPos;
+uniform vec2 windowSize;
+uniform vec2 screenshotSize;
+uniform float flShadow;
+uniform float flRadius;
+uniform float cameraScale;
+uniform bool gridEnabled;
+
+void main()
+{
+    vec4 cursor = vec4(cursorPos.x, windowSize.y - cursorPos.y, 0.0, 1.0);
+    color = mix(
+        texture(tex, texcoord), vec4(0.0, 0.0, 0.0, 0.0),
+        length(cursor - gl_FragCoord) < (flRadius * cameraScale) ? 0.0 : flShadow);
+
+    if(gridEnabled){
+        vec2 uv = texcoord * screenshotSize;
+        if(fract(uv.x) < 0.04f || fract(uv.y) < 0.04f)
+            color = vec4(0.0);
+    }
+
+}

shaders/vertex.glsl

@@ -0,0 +1,25 @@
+#version 130
+in vec3 aPos;
+in vec2 aTexCoord;
+out vec2 texcoord;
+
+uniform vec2 cameraPos;
+uniform float cameraScale;
+uniform vec2 windowSize;
+uniform vec2 screenshotSize;
+uniform vec2 cursorPos;
+
+vec3 to_world(vec3 v) {
+    vec2 ratio = vec2(
+        windowSize.x / screenshotSize.x / cameraScale,
+        windowSize.y / screenshotSize.y / cameraScale);
+    return vec3((v.x / screenshotSize.x * 2.0 - 1.0) / ratio.x,
+                (v.y / screenshotSize.y * 2.0 - 1.0) / ratio.y,
+                v.z);
+}
+
+void main()
+{
+  gl_Position = vec4(to_world((aPos - vec3(cameraPos * vec2(1.0, -1.0), 0.0))), 1.0);
+  texcoord = aTexCoord;
+}