Page 1 of 1
Background image & text on DS
Posted: Sat Sep 01, 2012 3:58 am
by t377y000
hi i'm trying to make a menu. on the DS/DSi top screen
a background image with text over it.
seem to be can't seem to i get it to work the background shows abit of static. that's the closest i have gotten it to work so far.
im useing these methods
Code: Select all
videoSetMode(MODE_4_2D);
vramSetBankA(VRAM_A_MAIN_BG);
"then for text"
consoleInit(0,0, BgType_Text4bpp, BgSize_T_256x256, 31,0, true, true);
printf("\x1b[1;1Hinsert text here");
"then for background"
int bg3 = bgInit(3, BgType_Bmp8, BgSize_B8_256x256, 0,0);
dmaCopy(gridbgBitmap, bgGetGfxPtr(bg3), 256*256);
dmaCopy(gridbgPal, BG_PALETTE, 256*2);
here's a screenshot of the dilemma i am having.
Re: Background image & text on DS
Posted: Sat Sep 01, 2012 2:24 pm
by elhobbs
Your console and your background are using the same memory.
Re: Background image & text on DS
Posted: Sat Sep 01, 2012 9:32 pm
by t377y000
elhobbs wrote:Your console and your background are using the same memory.
there any way i can make them use different memories?
Re: Background image & text on DS
Posted: Sun Sep 02, 2012 4:14 am
by elhobbs
Change the console from 31,0 to 4,0 and the background from 0,0 to 5,0.
Re: Background image & text on DS
Posted: Tue Sep 04, 2012 4:11 am
by t377y000
elhobbs wrote:Change the console from 31,0 to 4,0 and the background from 0,0 to 5,0.
hi thanks that kinda helped, im still having problems tho.
now im using this.
Code: Select all
videoSetMode(MODE_4_2D);
vramSetBankA(VRAM_A_MAIN_BG);
"then for text"
consoleInit(0,0, BgType_Text4bpp, BgSize_T_256x256, 4,0, true, true);
printf("\x1b[1;1Hinsert text here");
"then for background"
int bg3 = bgInit(3, BgType_Bmp8, BgSize_B8_256x256, 5,0);
dmaCopy(gridbgBitmap, bgGetGfxPtr(bg3), 256*256);
dmaCopy(gridbgPal, BG_PALETTE, 256*2);
here's the screenshot.
Re: Background image & text on DS
Posted: Tue Sep 04, 2012 4:00 pm
by elhobbs
are you loading the console first? does the background look ok if you disable the console? if you are loading the console first and then loading the palette for the background (or not loading the console) and it still looks bad then there is a problem converting your graphic in your build process. Since you are loading the background and the console on the main display they are sharing a palette. so either move the console to the sub display or make sure your palette is console friendly - and make sure you load the background palette after the console.
Re: Background image & text on DS
Posted: Wed Sep 05, 2012 3:38 am
by t377y000
elhobbs wrote:are you loading the console first? does the background look ok if you disable the console? if you are loading the console first and then loading the palette for the background (or not loading the console) and it still looks bad then there is a problem converting your graphic in your build process. Since you are loading the background and the console on the main display they are sharing a palette. so either move the console to the sub display or make sure your palette is console friendly - and make sure you load the background palette after the console.
im loading the background image 1st, then the text.
& when i disable the console yes the background image shows normally.
just tried loading the text before console, the image seems to work now but now the text is black. i wanted to use colors in the text. "im using the "printf("\x1b[32;1m");" for color text.
this is how it looks when loading background before console text.
this is how it looks when loading console text before background.
Re: Background image & text on DS
Posted: Wed Sep 05, 2012 10:11 am
by t377y000
hey thanks i figured i out. turns out i needed to change the file size in the "dmacopy"
Code: Select all
videoSetMode(MODE_4_2D);
vramSetBankA(VRAM_A_MAIN_BG);
"then for text"
consoleInit(0,0, BgType_Text4bpp, BgSize_T_256x256, 4,0, true, true);
printf("\x1b[1;1Hinsert text here");
"then for background"
int bg = bgInit(3, BgType_Bmp8, BgSize_B8_256x256, 5,0);
dmaCopy(gridbgBitmap, bgGetGfxPtr(bg), 256*256);
dmaCopy(gridbgPal, BG_PALETTE, 128);
i also got it working on both screens.
Re: Background image & text on DS
Posted: Wed Sep 05, 2012 2:03 pm
by elhobbs
I was trying to point out that the console and the background share a palette. dmaCopy expects the size to be in bytes. by changing the palette load to 128 bytes you are limiting your background to images that are 64 colors or less. which in this case is fine. however, you will likely find (depending on the palette for your background) that all of the default 16 colors that the console provides for text are not what you expect. the console sets up the palette like so for 4 bit:
Code: Select all
//set up the palette for color printing
palette[1 * 16 - 1] = RGB15(0,0,0); //30 normal black
palette[2 * 16 - 1] = RGB15(15,0,0); //31 normal red
palette[3 * 16 - 1] = RGB15(0,15,0); //32 normal green
palette[4 * 16 - 1] = RGB15(15,15,0); //33 normal yellow
palette[5 * 16 - 1] = RGB15(0,0,15); //34 normal blue
palette[6 * 16 - 1] = RGB15(15,0,15); //35 normal magenta
palette[7 * 16 - 1] = RGB15(0,15,15); //36 normal cyan
palette[8 * 16 - 1] = RGB15(24,24,24); //37 normal white
palette[9 * 16 - 1 ] = RGB15(15,15,15); //40 bright black
palette[10 * 16 - 1] = RGB15(31,0,0); //41 bright red
palette[11 * 16 - 1] = RGB15(0,31,0); //42 bright green
palette[12 * 16 - 1] = RGB15(31,31,0); //43 bright yellow
palette[13 * 16 - 1] = RGB15(0,0,31); //44 bright blue
palette[14 * 16 - 1] = RGB15(31,0,31); //45 bright magenta
palette[15 * 16 - 1] = RGB15(0,31,31); //46 bright cyan
palette[16 * 16 - 1] = RGB15(31,31,31); //47 & 39 bright white
essentially it treats it as 16 4bit palettes with the last entry being the font color. as you can see there is ample opportunity for conflict.