CMake: Add picosystem_asset for packing .16bpp into .o

libraries/picosystem.cmake

@@ -34,6 +34,21 @@ function(picosystem_executable NAME SOURCES)
   install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${NAME}.uf2 DESTINATION .)
 endfunction()
 
+function(picosystem_asset NAME PATH)
+  get_filename_component(PATH ${PATH} ABSOLUTE)
+  get_filename_component(ASSET ${PATH} NAME)
+  get_filename_component(PATH ${PATH} DIRECTORY)
+  set(OBJNAME ${ASSET}.o)
+  message("Building ${OBJNAME}")
+  add_custom_command(OUTPUT ${OBJNAME}
+    WORKING_DIRECTORY ${PATH}
+    COMMAND ${CMAKE_LINKER} -r -b binary -o ${CMAKE_CURRENT_BINARY_DIR}/${OBJNAME} ${ASSET})
+  # TODO figure out how to make static resources work
+    ## COMMAND ${CMAKE_OBJCOPY} --rename-section .data=.rodata,alloc,load,readonly,data,contents ${CMAKE_CURRENT_BINARY_DIR}/${OBJNAME} ${CMAKE_CURRENT_BINARY_DIR}/${OBJNAME})
+
+  target_sources(${NAME} PRIVATE ${OBJNAME})
+endfunction()
+
 function(pixel_double NAME)
   target_compile_options(${NAME} PRIVATE -DPIXEL_DOUBLE)
 endfunction()

template/CMakeLists.txt

@@ -35,6 +35,9 @@ picosystem_executable(
   ${PROJECT_SOURCES}
 )
 
+# Link the platformer spritesheet
+picosystem_asset(${PROJECT_NAME} ../assets/s4m_ur4i-platformer.16bpp)
+
 # --- End Of Boilerplate ---
 
 # Set your build options here

template/main.cpp

@@ -2,11 +2,21 @@
 
 using namespace picosystem;
 
+extern char _binary_s4m_ur4i_platformer_16bpp_start[];
+buffer_t *platformer = buffer(128, 128, (void *)_binary_s4m_ur4i_platformer_16bpp_start);
+
 void init() {
+    spritesheet(platformer);
 }
 
 void update(uint32_t tick) {
 }
 
 void draw(uint32_t tick) {
+    pen(0, 0, 0);
+    clear();
+    pen(15, 15, 15);
+    text("Hello World", 14, 12);
+    sprite(192, 4, 4);
+    sprite(192 + 16, 4, 12);
 }