Make demo programs work from any directory, and install them

1 files changed, 35 insertions, 0 deletions

diff --git a/examples/shaders/rect.vert b/examples/shaders/rect.vert
new file mode 100644
index 0000000..09f1917
--- /dev/null
+++ b/examples/shaders/rect.vert
@@ -0,0 +1,35 @@
+/* The vertex shader is trivial, but forwards scaled UV coordinates (in pixels)
+   to the fragment shader for drawing the border. */
+
+UBO(binding = 0) uniform UniformBufferObject
+{
+	mat4 projection;
+} ubo;
+
+layout(location = 0) in vec2 v_position;
+layout(location = 1) in vec2 v_origin;
+layout(location = 2) in vec2 v_size;
+layout(location = 3) in vec4 v_fillColor;
+
+INTER(location = 0) noperspective out vec2 f_uv;
+INTER(location = 1) noperspective out vec2 f_size;
+INTER(location = 2) noperspective out vec4 f_fillColor;
+
+void
+main()
+{
+	// clang-format off
+	mat4 m = mat4(v_size[0],   0.0,         0.0, 0.0,
+	              0.0,         v_size[1],   0.0, 0.0,
+	              0.0,         0.0,         1.0, 0.0,
+	              v_origin[0], v_origin[1], 0.0, 1.0);
+	// clang-format on
+
+	mat4 MVP = ubo.projection * m;
+
+	f_uv        = v_position * v_size;
+	f_size      = v_size;
+	f_fillColor = v_fillColor;
+
+	gl_Position = MVP * vec4(v_position, 0.0, 1.0);
+}