#include <3ds.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include "spidimage_bin.h"
void gfxDrawSprite(gfxScreen_t screen, gfx3dSide_t side, u8* spriteData, u16 width, u16 height, s16 x, s16 y) {
//This function includes documantation so you might be able to figure out what the function is doing, you don't need to understand this to use it!
if(!spriteData)return; //check if the function has sprite data, if not stop!
u16 fbWidth, fbHeight; //set variables for width and height
u8* fbAdr = gfxGetFramebuffer(screen, side, &fbWidth, &fbHeight); //get framebuffer for the screen and side used.
if(x + width < 0 || x >= fbWidth)return; //check invalid x cords
if(y + height < 0 ||y >= fbHeight)return; //check invalid y cords
u16 xOffset = 0, yOffset = 0; //set offset for x and y
u16 widthDrawn = width, heightDrawn = height; //set width/height vars that for drawing
if(x < 0) xOffset = -x; //use offset
if(y < 0) yOffset = -y; //use offset
if(x + width >= fbWidth) widthDrawn = fbWidth - x;
if(y + height >= fbHeight) heightDrawn = fbHeight - y;
widthDrawn -=xOffset;
heightDrawn -=yOffset;
int j;
for(j = yOffset; j < yOffset + heightDrawn; j++) { //for loop for drawing image
memcpy(&fbAdr[ ((x + xOffset) + (y + j) * fbWidth) * 3 ], &spriteData[ ((xOffset + j) * width) * 3 ], widthDrawn * 3); //copy imagedata into memory
}
}
void gfxDrawSpriteAlpha(gfxScreen_t screen, gfx3dSide_t side, u8* spriteData, u16 width, u16 height, s16 x, s16 y) {
if(!spriteData)return;
u16 fbWidth, fbHeight;
u8* fbAdr = gfxGetFramebuffer(screen, side, &fbWidth, &fbHeight);
if(x + width < 0 || x >= fbWidth)return;
if(y + height < 0 || y >= fbHeight)return;
u16 xOffset = 0, yOffset = 0;
u16 widthDrawn = width, heightDrawn = height;
if(x < 0)xOffset = -x;
if(y < 0)yOffset = -y;
if(x + width >= fbWidth) widthDrawn = fbWidth - x;
if(y + height >= fbHeight)heightDrawn = fbHeight - y;
widthDrawn -=xOffset;
heightDrawn -=yOffset;
//TODO : optimize
fbAdr += ( y + yOffset) * fbWidth * 3;
spriteData += yOffset * width * 4;
int j, i;
for(j = yOffset; j < yOffset + heightDrawn; j++) {
u8* fbd = &fbAdr[ (x + xOffset) * 3 ];
u8* data = &spriteData[ xOffset * 4 ];
for(i = xOffset; i < xOffset + widthDrawn; i++) {
if(data[3]) {
fbd[0] = data[0];
fbd[1] = data[1];
fbd[2] = data[2];
}
fbd +=3;
data +=4;
}
fbAdr += fbWidth * 3;
spriteData += width * 4;
}
}
void gfxDrawSpriteAlphaBlend(gfxScreen_t screen, gfx3dSide_t side, u8* spriteData, u16 width, u16 height, s16 x, s16 y) {
if(!spriteData)return;
u16 fbWidth, fbHeight;
u8* fbAdr = gfxGetFramebuffer(screen, side, &fbWidth, &fbHeight);
if(x + width < 0 || x >= fbWidth)return;
if(y + height < 0 || y >= fbHeight)return;
u16 xOffset = 0, yOffset = 0;
u16 widthDrawn = width, heightDrawn = height;
if(x < 0)xOffset = -x;
if(y < 0)yOffset = -y;
if(x + width >= fbWidth) widthDrawn = fbWidth - x;
if(y + height >= fbHeight)heightDrawn = fbHeight - y;
widthDrawn -=xOffset;
heightDrawn -=yOffset;
//TODO : optimize
fbAdr += (y + yOffset) * fbWidth * 3;
spriteData += yOffset * width *4;
int j, i;
for(j = yOffset; j < (yOffset + heightDrawn); j++) {
u8* fbd = &fbAdr[ (x + xOffset) * 3 ];
u8* data = &spriteData[ xOffset * 4 ];
for(i = xOffset; i < xOffset + widthDrawn; i++) {
if(data[3]) {
u8 alphaSource = data[3];
fbd[0] = ((data[0] * alphaSource)+(fbd[0] * (255 - alphaSource))) / 256;
fbd[1] = ((data[1] * alphaSource)+(fbd[1] * (255 - alphaSource))) / 256;
fbd[2] = ((data[2] * alphaSource)+(fbd[2] * (255 - alphaSource))) / 256;
}
fbd +=3;
data +=4;
}
fbAdr += fbWidth * 3;
spriteData += width * 4;
}
}
int xpos;
int ypos;
int main()
{
// Initializations
srvInit(); // services
aptInit(); // applets
hidInit(NULL); // input
gfxInit(); // graphics
gfxSet3D(false); // stereoscopy (true: enabled / false: disabled)
u32 kDown; // keys down
u32 kHeld; // keys pressed
u32 kUp; // keys up
// Main loop
while (aptMainLoop())
{
// Wait for next frame
gspWaitForVBlank();
// Read which buttons are currently pressed or not
hidScanInput();
kDown = hidKeysDown();
kHeld = hidKeysHeld();
kUp = hidKeysUp();
// If START button is pressed, break loop and quit
if (kDown & KEY_START){
break;
}
if (kHeld & KEY_LEFT){
ypos-=1;
}
if (kHeld & KEY_RIGHT){
ypos+=1;
}
if (kHeld & KEY_UP){
xpos+=1;
}
if (kHeld & KEY_DOWN){
xpos-=1;
}
gfxDrawSprite(GFX_TOP,GFX_LEFT,spidimage_bin,100,100,xpos,ypos);
// Flush and swap framebuffers
gfxFlushBuffers();
gfxSwapBuffers();
}
// Exit
gfxExit();
hidExit();
aptExit();
srvExit();
// Return to hbmenu
return 0;
}
