Homebrew Help Loading Image From SD Card [SPIDER]

gudenau · Feb 1, 2015

I am attempting to load an image from the SD card into the VRAM to display on the bottom screen, but it is not working.

Any help?

code.c

Code:

#define START_SECTION __attribute__ ((section (".text.start"), naked))
 
// make sure code is PIE
#ifndef __PIE__
#error "Must compile with -fPIE"
#endif
 
// File IO
#define FILE_R 0x1
#define FILE_W 0x6
 
typedef struct file_s {
    int s;
    int pos;
    int size;
} FILE;
 
 
int(*IFile_Open)(FILE *this, const short *path, int flags) = (void *)0x0022FE08;
int(*IFile_Read)(FILE *this, unsigned int *read, void *buffer, unsigned int size) = (void *)0x001686DC;
int(*IFile_Write)(FILE *this, unsigned int *written, void *src, unsigned int len) = (void *)0x00168764;
 
// GPU
int(*GX_SetTextureCopy)(void *input_buffer, void *output_buffer, unsigned int size, int in_x, int in_y, int out_x, int out_y, int flags) = 0x0011DD48;
int(*GSPGPU_FlushDataCache)(void *addr, unsigned int len) = 0x00191504;
 
// SVC
int(*svcSleepThread)(unsigned long long nanoseconds) = 0x0023FFE8;
 
int main();
 
int START_SECTION entryPoint(){
    __asm__ volatile (".word 0xE1A00000");
    main();
    __asm__ volatile ("bx lr");
}
 
int main(){
    int i;
    FILE *file = (void *)0x08F10000;
    int *buf = 0x18410000;
    int *read = 0x08F10020;
 
    //for (i = 0; i < 0xE100; i += 3){
    //    buf[i] = 0x0000FF00;
    //    buf[i + 1] = 0xFF0000FF;
    //    buf[i + 2] = 0x00FF0000;
    //}
 
    IFile_Open(file, L"dmc:/splash.bin", FILE_R);
    IFile_Read(file, read, buf, 0xE100);
 
    GSPGPU_FlushDataCache(buf, 0x00038400);
    GX_SetTextureCopy(buf, 0x1F48F000, 0x00038400, 0, 0, 0, 0, 8);
    svcSleepThread(0x400000LL);
    GSPGPU_FlushDataCache(buf, 0x00038400);
    GX_SetTextureCopy(buf, 0x1F4C7800, 0x00038400, 0, 0, 0, 0, 8);
    svcSleepThread(0x400000LL);
 
    svcSleepThread (0x6fc23ac00LL); // wait 30 seconds
 
    return 0;
}
 
int exit(int status){
    return 0;
}

SplashConvert.java

Code:

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.nio.ByteBuffer;
 
import javax.imageio.ImageIO;
 
 
public class SplashConvert {
    public static void main(String[] args) throws Throwable{
        System.out.println(args[0]);
        System.out.println(args[1]);
     
        BufferedImage image = ImageIO.read(new File(args[0]));
        FileOutputStream out = new FileOutputStream(new File(args[1]));
     
        int[] data = new int[image.getWidth() * image.getHeight()];
        image.getRGB(0, 0, image.getWidth(), image.getHeight(), data, 0, image.getWidth());
        ByteBuffer buffer = ByteBuffer.allocate(data.length*4);
        buffer.asIntBuffer().put(data);
        out.write(buffer.array());
        out.close();
    }
}

Edit:
Extra credit for a clean exit function. ;-)

shutterbug2000 · Feb 1, 2015

I'll take a look

shutterbug2000 · Feb 1, 2015

Mind posting splash.bin?

gudenau · Feb 1, 2015

shutterbug2000 said:
Mind posting splash.bin?

Yes, but I will make a test one real quick.
(Has to do with a secret project. :-P)

shutterbug2000 · Feb 1, 2015

gudenaurock said:
Yes, but I will make a test one real quick.
(Has to do with a secret project. :-P)

Ok

gudenau · Feb 1, 2015

Tada!

gudenau · Feb 1, 2015

I think I am copying an extra byte per pixel...

gudenau · Feb 1, 2015

Not quite right...

shutterbug2000 · Feb 1, 2015

Same here.

gudenau · Feb 1, 2015

What is the format of the framebuffer? (RGB, BGR, etc)

shutterbug2000 · Feb 1, 2015

gudenaurock said:
What is the format of the framebuffer? (RGB, BGR, etc)

Honestly, I'm not sure

.

WulfyStylez · Feb 1, 2015

gudenaurock said:
What is the format of the framebuffer? (RGB, BGR, etc)

Probably RGBA, 8 bits per color. Try dumping it and looking at it for reference, though.

vaguilar · Feb 1, 2015

gudenaurock said:
What is the format of the framebuffer? (RGB, BGR, etc)

BGR, one byte for each color.

gudenau · Feb 1, 2015

vaguilar said:
BGR, one byte for each color.

Thanks!

gudenau · Feb 1, 2015

I just had weird crap happen, I think it is a little closer though.

shutterbug2000 · Feb 1, 2015

gudenaurock said:
I just had weird crap happen, I think it is a little closer though.

Mind posting/ PM'ing source? I could take a look.

gudenau · Feb 1, 2015

shutterbug2000 said:
Mind posting/ PM'ing source? I could take a look.

That is many iterations behind, my current source just copies the top screen, it works though. :-P I think my file IO might not be working correctly.

Code:

#define START_SECTION __attribute__ ((section (".text.start"), naked))
 
// make sure code is PIE
#ifndef __PIE__
#error "Must compile with -fPIE"
#endif
 
// File IO
#define FILE_R 0x1
#define FILE_W 0x6
 
typedef struct file_s {
    int s;
    int pos;
    int size;
} FILE;
 
 
int(*IFile_Open)(FILE *this, const short *path, int flags) = (void *)0x0022FE08;
int(*IFile_Read)(FILE *this, unsigned int *read, void *buffer, unsigned int size) = (void *)0x001686DC;
int(*IFile_Write)(FILE *this, unsigned int *written, void *src, unsigned int len) = (void *)0x00168764;
 
// GPU
int(*GX_SetTextureCopy)(void *input_buffer, void *output_buffer, unsigned int size, int in_x, int in_y, int out_x, int out_y, int flags) = 0x0011DD48;
int(*GSPGPU_FlushDataCache)(void *addr, unsigned int len) = 0x00191504;
 
// SVC
int(*svcSleepThread)(unsigned long long nanoseconds) = 0x0023FFE8;
 
int main();
 
int START_SECTION entryPoint(){
    __asm__ volatile (".word 0xE1A00000");
    main();
    __asm__ volatile ("bx lr");
}
 
int main(){
    FILE *file = (void *)0x08F10000;
    unsigned int address;
    int *buffer = 0x18410000;
    int *read = 0x08F10020;
    int i;
    unsigned int offset;
 
    IFile_Open(file, L"dmc:/splash.bin", FILE_R);
    file->pos = 0x00;
 
    for(i = 0x1F48F000; i < 0x1F48F000 + 0x38400; i += 1000){
        file->pos = i-0x1F48F000;
        IFile_Read(file, read, buffer, 0x1000);
        svcSleepThread(0x400000LL);
        buffer += 0x1000;
    }
 
    for(i = 0; i < 0x400; i++){
        GSPGPU_FlushDataCache(0x1F1E6000, 0x38400);
        GX_SetTextureCopy(0x1F1E6000, 0x1F48F000, 0x38400, 0, 0, 0, 0, 8);
        GSPGPU_FlushDataCache(0x1F48F000, 0x38400);
   
        GSPGPU_FlushDataCache(0x1F1E6000, 0x38400);
        GX_SetTextureCopy(0x1F1E6000, 0x1F4C7800, 0x38400, 0, 0, 0, 0, 8);
        GSPGPU_FlushDataCache(0x1F4C7800, 0x38400);
    }
 
    //0x1F48F000
 
    svcSleepThread (0x6fc23ac00LL); // wait 30 seconds
 
    return 0;
}

Please do not tell anybody the part I edited out.

shutterbug2000 · Feb 1, 2015

gudenaurock said:

That is many iterations behind, my current source just copies the top screen, it works though. :-P I think my file IO might not be working correctly.

Code:

#define START_SECTION __attribute__ ((section (".text.start"), naked))
 
// make sure code is PIE
#ifndef __PIE__
#error "Must compile with -fPIE"
#endif
 
// File IO
#define FILE_R 0x1
#define FILE_W 0x6
 
typedef struct file_s {
    int s;
    int pos;
    int size;
} FILE;
 
 
int(*IFile_Open)(FILE *this, const short *path, int flags) = (void *)0x0022FE08;
int(*IFile_Read)(FILE *this, unsigned int *read, void *buffer, unsigned int size) = (void *)0x001686DC;
int(*IFile_Write)(FILE *this, unsigned int *written, void *src, unsigned int len) = (void *)0x00168764;
 
// GPU
int(*GX_SetTextureCopy)(void *input_buffer, void *output_buffer, unsigned int size, int in_x, int in_y, int out_x, int out_y, int flags) = 0x0011DD48;
int(*GSPGPU_FlushDataCache)(void *addr, unsigned int len) = 0x00191504;
 
// SVC
int(*svcSleepThread)(unsigned long long nanoseconds) = 0x0023FFE8;
 
int main();
 
int START_SECTION entryPoint(){
    __asm__ volatile (".word 0xE1A00000");
    main();
    __asm__ volatile ("bx lr");
}
 
int main(){
    FILE *file = (void *)0x08F10000;
    unsigned int address;
    int *buffer = 0x18410000;
    int *read = 0x08F10020;
    int i;
    unsigned int offset;
 
    IFile_Open(file, L"dmc:/splash.bin", FILE_R);
    file->pos = 0x00;
 
    for(i = 0x1F48F000; i < 0x1F48F000 + 0x38400; i += 1000){
        file->pos = i-0x1F48F000;
        IFile_Read(file, read, buffer, 0x1000);
        svcSleepThread(0x400000LL);
        buffer += 0x1000;
    }
 
    for(i = 0; i < 0x400; i++){
        GSPGPU_FlushDataCache(0x1F1E6000, 0x38400);
        GX_SetTextureCopy(0x1F1E6000, 0x1F48F000, 0x38400, 0, 0, 0, 0, 8);
        GSPGPU_FlushDataCache(0x1F48F000, 0x38400);
 
        GSPGPU_FlushDataCache(0x1F1E6000, 0x38400);
        GX_SetTextureCopy(0x1F1E6000, 0x1F4C7800, 0x38400, 0, 0, 0, 0, 8);
        GSPGPU_FlushDataCache(0x1F4C7800, 0x38400);
    }
 
    //0x1F48F000
 
    svcSleepThread (0x6fc23ac00LL); // wait 30 seconds
 
    return 0;
}

Please do not tell anybody the part I edited out.

Don't worry, I won't tell. I'm not the kind of guy to do that(I AM interested however. But no leaking from me

)

Anyway, could you post a sample splash.bin(with the bgr)?

gudenau · Feb 1, 2015

Here.

shutterbug2000 · Feb 2, 2015

Hmm. Could you check to make sure you are creating splash.bin properly? Not sure what else could be causing garbage graphics.

Homebrew Help Loading Image From SD Card [SPIDER]

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