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-rw-r--r--shaders/rect.frag13
-rw-r--r--shaders/rect.vert24
2 files changed, 26 insertions, 11 deletions
diff --git a/shaders/rect.frag b/shaders/rect.frag
index c5dedf9..5e3af9d 100644
--- a/shaders/rect.frag
+++ b/shaders/rect.frag
@@ -10,10 +10,9 @@
specified precisely in pixels to draw sharp lines. The border width is just
hardcoded, but could be made a uniform or vertex attribute easily enough. */
-uniform vec2 u_size;
-uniform vec4 u_fillColor;
-
noperspective in vec2 f_uv;
+noperspective in vec2 f_size;
+noperspective in vec4 f_fillColor;
layout(location = 0) out vec4 FragColor;
@@ -22,14 +21,14 @@ main()
{
const float borderWidth = 2.0;
- vec4 borderColor = u_fillColor + vec4(0.0, 0.4, 0.4, 0.0);
+ vec4 borderColor = f_fillColor + vec4(0.0, 0.4, 0.4, 0.0);
float t = step(borderWidth, f_uv[1]);
- float r = step(borderWidth, u_size.x - f_uv[0]);
- float b = step(borderWidth, u_size.y - f_uv[1]);
+ float r = step(borderWidth, f_size.x - f_uv[0]);
+ float b = step(borderWidth, f_size.y - f_uv[1]);
float l = step(borderWidth, f_uv[0]);
float fillMix = t * r * b * l;
float borderMix = 1.0 - fillMix;
- vec4 fill = fillMix * u_fillColor;
+ vec4 fill = fillMix * f_fillColor;
vec4 border = borderMix * borderColor;
FragColor = fill + border;
diff --git a/shaders/rect.vert b/shaders/rect.vert
index de74fa7..bf2e951 100644
--- a/shaders/rect.vert
+++ b/shaders/rect.vert
@@ -3,16 +3,32 @@
/* The vertex shader is trivial, but forwards scaled UV coordinates (in pixels)
to the fragment shader for drawing the border. */
-uniform mat4 MVP;
-uniform vec2 u_size;
+uniform mat4 u_projection;
-in vec2 v_position;
+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;
noperspective out vec2 f_uv;
+noperspective out vec2 f_size;
+noperspective out vec4 f_fillColor;
void
main()
{
- f_uv = v_position * u_size;
+ // 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 = u_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);
}