#124431 - Stuk - Thu Apr 05, 2007 11:22 pm
Hi,
I can get a nice background image displayed on the main screen, however no matter what I do I cannot get anything to be displayed on the sub screen.
I have been following the Patatersoft tutorial, however I could not get the example code to work with my images, and so I'm using the techniques demonstrated in liranuna's.
This is the code I am using:
In BG_MAP_BASE(#) and BG_MAP_RAM(#) (and equivalent TILE functions) # can be changed to almost any number (<31 and >1) without making any difference.
Both of the images (in .bin files) are ok, as I can display them both by swapping around the topbg_/bottombg_ bits. The sub palette also works fine, as I can see the colour of the first pixel in the image across the whole sub screen.
I've tried looking around for an answer, and searching the forums, but had no luck :(
Any help would be really appreciated,
Stuk
(I hope I've posted this in the right place, rather than the Beginners forum.)
I can get a nice background image displayed on the main screen, however no matter what I do I cannot get anything to be displayed on the sub screen.
I have been following the Patatersoft tutorial, however I could not get the example code to work with my images, and so I'm using the techniques demonstrated in liranuna's.
This is the code I am using:
| Code: |
|
void initVideo() { // Setting up video mode videoSetMode(MODE_0_2D | DISPLAY_BG0_ACTIVE); videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE); vramSetMainBanks(VRAM_A_MAIN_BG, VRAM_B_MAIN_BG, VRAM_C_SUB_BG, VRAM_D_LCD); BG0_CR = BG_32x32 | BG_COLOR_256 | BG_MAP_BASE(0) | BG_TILE_BASE(1); SUB_BG0_CR = BG_32x32 | BG_COLOR_256 | BG_MAP_BASE(2) | BG_TILE_BASE(3); //put main on the bottom lcdMainOnBottom(); } void displayBottom() { // Copying the tiles to tile base 1 memcpy((void*)BG_TILE_RAM(1), bottombg_img_bin, bottombg_img_bin_size); // Copying the map to map base 0 memcpy((void*)BG_MAP_RAM(0), bottombg_map_bin, bottombg_map_bin_size); // Copying the palette to the palette area memcpy((void*)BG_PALETTE, bottombg_pal_bin, bottombg_pal_bin_size); } void displayTop() { // Copying the tiles to tile base 1 memcpy((void*)BG_TILE_RAM(3), topbg_img_bin, topbg_img_bin_size); // Copying the map to map base 0 memcpy((void*)BG_MAP_RAM(2), topbg_map_bin, topbg_map_bin_size); // Copying the palette to the palette area memcpy((void*)BG_PALETTE_SUB, topbg_pal_bin, topbg_pal_bin_size); } int main () { //turn on the 2D core powerON(POWER_ALL_2D); irqInit(); irqSet(IRQ_VBLANK, 0); initVideo(); displayBottom(); displayTop(); while(1){}; return 0; } |
In BG_MAP_BASE(#) and BG_MAP_RAM(#) (and equivalent TILE functions) # can be changed to almost any number (<31 and >1) without making any difference.
Both of the images (in .bin files) are ok, as I can display them both by swapping around the topbg_/bottombg_ bits. The sub palette also works fine, as I can see the colour of the first pixel in the image across the whole sub screen.
I've tried looking around for an answer, and searching the forums, but had no luck :(
Any help would be really appreciated,
Stuk
(I hope I've posted this in the right place, rather than the Beginners forum.)