Wii U Console Output Example

#include "coreinit.h"
#define snprintf __os_snprintf

struct vector2D {
    unsigned int x,y;
};

//Fills the screen with a flat blue colour
void clearScreen(unsigned int core_handle) {
    unsigned int(*OSScreenClearBufferEx)(unsigned int bufferNum, unsigned int temp);
    OSDynLoad_FindExport(core_handle, 0, "OSScreenClearBufferEx", &OSScreenClearBufferEx);
    unsigned int colour = (37 << 24) | (164 << 16) | (214 << 8) | 255;
    OSScreenClearBufferEx(0, colour);
    OSScreenClearBufferEx(1, colour);
}

//Flip the buffers
void flipBuffers(unsigned int core_handle) {
    /* taken from Relys's libwiiu as i'm go lazy to re-code it :P */
    void(*DCFlushRange)(void *buffer, unsigned int length);
    unsigned int(*OSScreenFlipBuffersEx)(unsigned int bufferNum);
    OSDynLoad_FindExport(core_handle, 0, "DCFlushRange", &DCFlushRange);
    OSDynLoad_FindExport(core_handle, 0, "OSScreenFlipBuffersEx", &OSScreenFlipBuffersEx);
    unsigned int(*OSScreenGetBufferSizeEx)(unsigned int bufferNum);
    OSDynLoad_FindExport(core_handle, 0, "OSScreenGetBufferSizeEx", &OSScreenGetBufferSizeEx);
    int buf0_size = OSScreenGetBufferSizeEx(0);
    int buf1_size = OSScreenGetBufferSizeEx(1);
    DCFlushRange((void *)0xF4000000 + buf0_size, buf1_size);
    DCFlushRange((void *)0xF4000000, buf0_size);
    OSScreenFlipBuffersEx(0);
    OSScreenFlipBuffersEx(1);
}

void exit(char* log);
void console(unsigned int core_handle, char* output, char* consoleBuffer, struct vector2D consoleCursor);

void _start() {

    /* Load a good stack */
    asm(
        "lis %r1, 0x1ab5 ;"
        "ori %r1, %r1, 0xd138 ;"
    );

    struct vector2D consoleCursor = {0,0};

    unsigned int net_handle;
    unsigned int core_handle;
    char consoleBuffer[20048];

    char debug[256];
    OSDynLoad_Acquire("nlibcurl.rpl", &net_handle);
    OSDynLoad_Acquire("coreinit.rpl", &core_handle);

    snprintf(debug, 255, "Console Demo By @filfat");
    console(core_handle, debug, consoleBuffer, consoleCursor);

    //CURL* (*curl_easy_init)(void);
    char* (*curl_version)(void);

    //OSDynLoad_FindExport(net_handle, 0, "curl_easy_init", &curl_easy_init);
    OSDynLoad_FindExport(net_handle, 0, "curl_version", &curl_version);

    snprintf(debug, 255, "The cURL version of this console is: %s\n", curl_version());
    console(core_handle, debug, consoleBuffer, consoleCursor);

    while(1){

    }
    exit("You shouldn't be here\nGo back to the loop gwad damn it! :P");
}

void console(unsigned int core_handle, char* output, char* consoleBuffer, struct vector2D consoleCursor) {
    flipBuffers(core_handle);
    clearScreen(core_handle);
    unsigned int (*OSScreenPutFontEx)(unsigned int bufferNum, unsigned int posX, unsigned int posY, void* buffer);
    OSDynLoad_FindExport(core_handle, 0, "OSScreenPutFontEx", &OSScreenPutFontEx);
    snprintf(consoleBuffer,20048,"%s%s",consoleBuffer, output);
    OSScreenPutFontEx(0, consoleCursor.x, consoleCursor.y, consoleBuffer);
    OSScreenPutFontEx(1, consoleCursor.x, consoleCursor.y, consoleBuffer);
    //consoleCursor.y += 25;
}

void exit(char* log) {
    //Let's Print the output and halt the system
    OSFatal(log);
}