From 44e987c8521a99519350a42292bcfcd28451dcbd Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Mon, 20 Dec 2021 10:26:12 +0100
Subject: Async load images

---
 src/mgui/image.c | 38 +++++++++++++++++++++++++++++---------
 1 file changed, 29 insertions(+), 9 deletions(-)

(limited to 'src/mgui/image.c')

diff --git a/src/mgui/image.c b/src/mgui/image.c
index 1a0871f..9f50b9c 100644
--- a/src/mgui/image.c
+++ b/src/mgui/image.c
@@ -2,12 +2,15 @@
 #include "../../include/resource_loader.h"
 #include "../../include/common.h"
 #include "../../include/alloc.h"
+#include "../../include/async_image.h"
 #include <mgl/mgl.h>
 #include <mgl/window/event.h>
-#include <mgl/graphics/texture.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <assert.h>
 
-/* TODO: Load image asynchronously and support network files */
+/* TODO: Support network files */
+/* TODO: Set a target size and use that for calculating size and resize image to that */
 
 static mgl_vec2i wrap_to_size_x(mgl_vec2i size, int clamp_size) {
     mgl_vec2i new_size;
@@ -52,13 +55,24 @@ static mgl_vec2i clamp_to_size(mgl_vec2i size, mgl_vec2i clamp_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);
-    (void)filepath;
-    /* TODO: Use |filepath| */
     mgl_sprite_init(&image->sprite, NULL);
+    image->max_size = (mgl_vec2i){ 0, 0 };
+
+    if(filepath) {
+        image->async_image = mgui_async_image_get_by_path(filepath);
+        if(image->async_image->state == MGUI_ASYNC_IMAGE_APPLIED)
+            mgl_sprite_set_texture(&image->sprite, &image->async_image->texture);
+    } else {
+        image->async_image = NULL;
+    }
+
     return image;
 }
 
 void mgui_image_destroy(mgui_image *image) {
+    if(image->async_image)
+        mgui_async_image_unref(image->async_image);
+    image->sprite.texture = NULL;
     mgui_free(image);
 }
 
@@ -76,6 +90,7 @@ void mgui_image_set_position(mgui_image *self, mgl_vec2i position) {
 }
 
 void mgui_image_calculate_size(mgui_image *self, mgl_vec2i max_size) {
+    self->max_size = 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);
@@ -85,7 +100,7 @@ void mgui_image_calculate_size(mgui_image *self, mgl_vec2i max_size) {
 
         self->widget.size = new_size;
     } else {
-        self->widget.size = (mgl_vec2i){ 0, 0 };
+        self->widget.size = (mgl_vec2i){ 1, 1 };
     }
 }
 
@@ -97,9 +112,14 @@ void mgui_image_on_event(mgui_image *self, mgl_window *window, mgl_event *event)
 }
 
 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);
+    if(self->async_image && mgui_rectangle_intersects_with_scissor((mgl_vec2i){ self->sprite.position.x, self->sprite.position.y }, self->widget.size, window)) {
+        mgui_async_image_update(self->async_image);
+        if(self->async_image->state == MGUI_ASYNC_IMAGE_APPLIED) {
+            mgl_sprite_set_texture(&self->sprite, &self->async_image->texture);
+            /* TODO: Check if this is correct when taking margin into consideration */
+            mgui_image_calculate_size(self, self->max_size);
+            if(self->sprite.texture && self->sprite.texture->id)
+                mgl_sprite_draw(mgl_get_context(), &self->sprite);
+        }
     }
 }
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