Added a dynamic array.

src/ui/image.c

@@ -7,23 +7,51 @@
 
 #include "image.h"
 
-void imageInit(image_t *image, texture_t *texture) {
+void imageInit(image_t *image) {
   image->quad.verticeCount = -1;
-  imageSetTexture(image, texture);
+  image->width = 1;
+  image->height = 1;
+  imageSetTexture(image, NULL);
 }
 
 void imageSetTexture(image_t *image, texture_t *texture) {
+  imageSetTextureAndCrop(image, texture,
+    0, 0,
+    texture == NULL ? 0 : (float)texture->width,
+    texture == NULL ? 0 : (float)texture->height
+  );
+}
+
+void imageSetTextureAndCrop(image_t *image, texture_t *texture,
+  float x, float y, float width, float height
+) {
+  float u0, u1, v0, v1;
   if(image->quad.verticeCount != -1) {
     primitiveDispose(&image->quad);
     image->quad.verticeCount = -1;
   }
+  if(texture == NULL) return;
+
+  u0 = x / texture->width;
+  u1 = u0 + (width / texture->width);
+  v0 = y / texture->height;
+  v1 = v0 + (height / texture->height);
   
   image->texture = texture;
-  quadInit(&image->quad, 0, 0,0,0,0, texture->width,texture->height,1,1);
+  quadInit(&image->quad, 0,
+    0,0,u0,v0,
+    1,1,u1,v1
+  );
 }
 
 void imageRender(image_t *image, shader_t *shader, float x, float y) {
-  shaderUsePosition(shader, x, y, 0, 0, 0, 0);
+  if(image->texture == NULL) return;
+  shaderUsePositionAndScale(shader,
+    x,y,0,
+    0,0,0,
+    image->width, image->height, 1
+  );
+  shaderUseTexture(shader, image->texture);
   primitiveDraw(&image->quad, 0, -1);
 }