Add drop shadow

1 files changed, 56 insertions, 6 deletions

diff --git a/src/RoundedRectangle.cpp b/src/RoundedRectangle.cpp
index 4aad699..596d980 100644
--- a/src/RoundedRectangle.cpp
+++ b/src/RoundedRectangle.cpp
@@ -8,17 +8,38 @@ namespace QuickMedia {
         radius(radius), pos(0.0f, 0.0f), size(size), rounded_rectangle_shader(rounded_rectangle_shader), band_color(sf::Color::Transparent)
     {
         assert(rounded_rectangle_shader);
-        vertices[0].color = color;
-        vertices[1].color = color;
-        vertices[2].color = color;
-        vertices[3].color = color;
-
         vertices[0].texCoords = sf::Vector2f(0.0f, 0.0f);
         vertices[1].texCoords = sf::Vector2f(1.0f, 0.0f);
         vertices[2].texCoords = sf::Vector2f(1.0f, 1.0f);
         vertices[3].texCoords = sf::Vector2f(0.0f, 1.0f);
-
+        set_color(color);
         set_size(size);
+
+        const sf::Color shadow_color(0, 0, 0, 50);
+
+        // Top
+        drop_shadow_vertices[0].color = sf::Color(shadow_color.r, shadow_color.g, shadow_color.b, 0);
+        drop_shadow_vertices[1].color = sf::Color(shadow_color.r, shadow_color.g, shadow_color.b, 0);
+        drop_shadow_vertices[2].color = shadow_color;
+        drop_shadow_vertices[3].color = shadow_color;
+
+        // Bottom
+        drop_shadow_vertices[4].color = shadow_color;
+        drop_shadow_vertices[5].color = shadow_color;
+        drop_shadow_vertices[6].color = sf::Color(shadow_color.r, shadow_color.g, shadow_color.b, 0);
+        drop_shadow_vertices[7].color = sf::Color(shadow_color.r, shadow_color.g, shadow_color.b, 0);
+
+        // Left
+        drop_shadow_vertices[8].color = sf::Color(shadow_color.r, shadow_color.g, shadow_color.b, 0);
+        drop_shadow_vertices[9].color = sf::Color(shadow_color.r, shadow_color.g, shadow_color.b, 0);
+        drop_shadow_vertices[10].color = shadow_color;
+        drop_shadow_vertices[11].color = shadow_color;
+
+        // Right
+        drop_shadow_vertices[12].color = sf::Color(shadow_color.r, shadow_color.g, shadow_color.b, 0);
+        drop_shadow_vertices[13].color = sf::Color(shadow_color.r, shadow_color.g, shadow_color.b, 0);
+        drop_shadow_vertices[14].color = shadow_color;
+        drop_shadow_vertices[15].color = shadow_color;
     }
 
     void RoundedRectangle::set_position(sf::Vector2f pos) {
@@ -27,6 +48,33 @@ namespace QuickMedia {
         vertices[1].position = pos + sf::Vector2f(size.x, 0.0f);
         vertices[2].position = pos + sf::Vector2f(size.x, size.y);
         vertices[3].position = pos + sf::Vector2f(0.0f, size.y);
+
+        const sf::Color shadow_color(0, 0, 0, 50);
+        const float shadow_radius = 5.0f;
+
+        // Top
+        drop_shadow_vertices[0].position = pos + sf::Vector2f(radius*0.5f, 0.0f) - sf::Vector2f(0.0f, shadow_radius);
+        drop_shadow_vertices[1].position = pos + sf::Vector2f(size.x - radius*0.5f, 0.0f) - sf::Vector2f(0.0f, shadow_radius);
+        drop_shadow_vertices[2].position = pos + sf::Vector2f(size.x - radius*0.5f, 0.0f);
+        drop_shadow_vertices[3].position = pos + sf::Vector2f(radius*0.5f, 0.0f);
+
+        // Bottom
+        drop_shadow_vertices[4].position = pos + sf::Vector2f(radius*0.5f, size.y);
+        drop_shadow_vertices[5].position = pos + size - sf::Vector2f(radius*0.5f, 0.0f);
+        drop_shadow_vertices[6].position = pos + size - sf::Vector2f(radius*0.5f, 0.0f) + sf::Vector2f(0.0f, shadow_radius);
+        drop_shadow_vertices[7].position = pos + sf::Vector2f(radius*0.5f, size.y) + sf::Vector2f(0.0f, shadow_radius);
+
+        // Left
+        drop_shadow_vertices[8].position = pos + sf::Vector2f(-shadow_radius, size.y - radius*0.5f);
+        drop_shadow_vertices[9].position = pos + sf::Vector2f(-shadow_radius, radius*0.5f);
+        drop_shadow_vertices[10].position = pos + sf::Vector2f(0.0f, radius*0.5f);
+        drop_shadow_vertices[11].position = pos + sf::Vector2f(0.0f, size.y - radius*0.5f);
+
+        // Right
+        drop_shadow_vertices[12].position = pos + sf::Vector2f(size.x + shadow_radius, radius*0.5f);
+        drop_shadow_vertices[13].position = pos + sf::Vector2f(size.x + shadow_radius, size.y - radius*0.5f);
+        drop_shadow_vertices[14].position = pos + sf::Vector2f(size.x, size.y - radius*0.5f);
+        drop_shadow_vertices[15].position = pos + sf::Vector2f(size.x, radius*0.5f);
     }
 
     void RoundedRectangle::set_size(sf::Vector2f size) {
@@ -59,6 +107,8 @@ namespace QuickMedia {
     }
 
     void RoundedRectangle::draw(sf::RenderTarget &target) {
+        target.draw(drop_shadow_vertices, 16, sf::Quads);
+
         // TODO: Remove these for optimizations. Also do the same in other places where setUniform is called
         rounded_rectangle_shader->setUniform("radius", radius);
         rounded_rectangle_shader->setUniform("band_pos", band_pos);