Layout, expand, etc

1 files changed, 53 insertions, 8 deletions

diff --git a/src/mgui/image.c b/src/mgui/image.c
index c2ff12f..1a0871f 100644
--- a/src/mgui/image.c
+++ b/src/mgui/image.c
@@ -9,6 +9,46 @@
 
 /* TODO: Load image asynchronously and support network files */
 
+static mgl_vec2i wrap_to_size_x(mgl_vec2i size, int clamp_size) {
+    mgl_vec2i new_size;
+    if(size.x == 0) {
+        new_size.x = 0;
+        new_size.y = 0;
+        return new_size;
+    }
+    float size_ratio = (float)size.y / (float)size.x;
+    new_size.x = clamp_size;
+    new_size.y = new_size.x * size_ratio;
+    return new_size;
+}   
+
+static mgl_vec2i wrap_to_size_y(mgl_vec2i size, int clamp_size) {
+    mgl_vec2i new_size;
+    if(size.y == 0) {
+        new_size.x = 0;
+        new_size.y = 0;
+        return new_size;
+    }
+    float size_ratio = (float)size.x / (float)size.y;
+    new_size.y = clamp_size;
+    new_size.x = new_size.y * size_ratio;
+    return new_size;
+}   
+
+static mgl_vec2i wrap_to_size(const mgl_vec2i size, const mgl_vec2i clamp_size) {
+    mgl_vec2i new_size = wrap_to_size_x(size, clamp_size.x);
+    if(new_size.y > clamp_size.y)
+        new_size = wrap_to_size_y(size, clamp_size.y);
+    return new_size;
+}
+
+static mgl_vec2i clamp_to_size(mgl_vec2i size, mgl_vec2i clamp_size) {
+    mgl_vec2i new_size = size;
+    if(size.x > clamp_size.x || size.y > clamp_size.y)
+        new_size = wrap_to_size(new_size, clamp_size);
+    return new_size;
+}
+
 mgui_image* mgui_image_create(const char *filepath) {
     mgui_image *image = mgui_alloc(sizeof(mgui_image));
     mgui_widget_init(&image->widget, MGUI_WIDGET_IMAGE);
@@ -35,10 +75,18 @@ void mgui_image_set_position(mgui_image *self, mgl_vec2i position) {
     mgl_sprite_set_position(&self->sprite, (mgl_vec2f){ position.x, position.y });
 }
 
-void mgui_image_set_width(mgui_image *self, int width) {
-    /* TODO: Implement */
-    (void)self;
-    (void)width;
+void mgui_image_calculate_size(mgui_image *self, mgl_vec2i max_size) {
+    if(self->sprite.texture) {
+        const mgl_vec2i texture_size = (mgl_vec2i){ self->sprite.texture->width, self->sprite.texture->height };
+        const mgl_vec2i new_size = clamp_to_size(texture_size, max_size);
+
+        self->sprite.scale.x = (float)new_size.x / (float)texture_size.x;
+        self->sprite.scale.y = (float)new_size.y / (float)texture_size.y;
+
+        self->widget.size = new_size;
+    } else {
+        self->widget.size = (mgl_vec2i){ 0, 0 };
+    }
 }
 
 void mgui_image_on_event(mgui_image *self, mgl_window *window, mgl_event *event) {
@@ -48,13 +96,10 @@ void mgui_image_on_event(mgui_image *self, mgl_window *window, mgl_event *event)
     /* TODO: Implement */
 }
 
-mgl_vec2i mgui_image_draw(mgui_image *self, mgl_window *window) {
+void mgui_image_draw(mgui_image *self, mgl_window *window) {
     if(self->sprite.texture) {
         const mgl_vec2i texture_size = (mgl_vec2i){ self->sprite.texture->width, self->sprite.texture->height };
         if(mgui_rectangle_intersects_with_scissor((mgl_vec2i){ self->sprite.position.x, self->sprite.position.y }, texture_size, window))
             mgl_sprite_draw(mgl_get_context(), &self->sprite);
-        return texture_size;
-    } else {
-        return (mgl_vec2i){ 0, 0 };
     }
 }