Fill accepts UV subrect to use;

src/api/graphics.c

@@ -796,7 +796,11 @@ static int l_lovrGraphicsStencil(lua_State* L) {
 
 static int l_lovrGraphicsFill(lua_State* L) {
   Texture* texture = lua_isnoneornil(L, 1) ? NULL : luax_checktexture(L, 1);
-  lovrGraphicsFill(texture);
+  float u = luaL_optnumber(L, 2, 0.);
+  float v = luaL_optnumber(L, 3, 0.);
+  float w = luaL_optnumber(L, 4, 1. - u);
+  float h = luaL_optnumber(L, 5, 1. - v);
+  lovrGraphicsFill(texture, u, v, w, h);
   return 0;
 }
 

src/graphics/graphics.c

@@ -873,7 +873,7 @@ void lovrGraphicsPrint(const char* str, mat4 transform, float wrap, HorizontalAl
   lovrGraphicsPop();
 }
 
-void lovrGraphicsFill(Texture* texture) {
+void lovrGraphicsFill(Texture* texture, float u, float v, float w, float h) {
   lovrGraphicsPushPipeline();
   lovrGraphicsSetDepthTest(COMPARE_NONE, false);
   lovrGraphicsDraw(&(DrawCommand) {
@@ -883,10 +883,10 @@ void lovrGraphicsFill(Texture* texture) {
     .mode = MESH_TRIANGLE_STRIP,
     .vertex.count = 4,
     .vertex.data = (float[]) {
-      -1, 1, 0,  0, 0, 0, 0, 1,
-      -1, -1, 0, 0, 0, 0, 0, 0,
-      1, 1, 0,   0, 0, 0, 1, 1,
-      1, -1, 0,  0, 0, 0, 1, 0
+      -1, 1, 0,  0, 0, 0, u, v + h,
+      -1, -1, 0, 0, 0, 0, u, v,
+      1, 1, 0,   0, 0, 0, u + w, v + h,
+      1, -1, 0,  0, 0, 0, u + w, v
     }
   });
   lovrGraphicsPopPipeline();

src/graphics/graphics.h

@@ -222,7 +222,7 @@ void lovrGraphicsCylinder(Material* material, float x1, float y1, float z1, floa
 void lovrGraphicsSphere(Material* material, mat4 transform, int segments);
 void lovrGraphicsSkybox(Texture* texture, float angle, float ax, float ay, float az);
 void lovrGraphicsPrint(const char* str, mat4 transform, float wrap, HorizontalAlign halign, VerticalAlign valign);
-void lovrGraphicsFill(Texture* texture);
+void lovrGraphicsFill(Texture* texture, float u, float v, float w, float h);
 #define lovrGraphicsStencil lovrGpuStencil
 #define lovrGraphicsCompute lovrGpuCompute