jpgs and assets

[NeX]

Hi there,

I am trying to display Jpgs and assets at the same time but i cant figure it out.

i want to use a JPG as a background, and then display assets over the top, but it seems that using GD.load fills the video memory with the jpg and then trying to call assets results on glitches on the screen.

is it possible to use a JPG as a background and then display assets over the top?

thanks

[NeX]

bump,

anyone? i am sure there must be an order in which data is loaded into the graphics memory but I can't figure it out, thanks

[jamesbowman]

Yes, when mixing assets with loaded jpegs you have to take care that:

(1) they use different places in video memory
(2) they use different bitmap handles

The asset converter always starts using bitmap handles from zero, and video memory from zero. So the easiest way is to load the assets, THEN load the JPEGs.

The asset converter always defines a symbol ASSETS_END that is the address of the first free byte in video memory, so taking the 'walk' example and loading a JPEG:




#include <EEPROM.h>
#include <SPI.h>
#include <GD2.h>

static int a[256];

#include "walk_assets.h"

void setup()
{
 GD.begin();
 LOAD_ASSETS();
 for (int i = 0; i < 256; i++)
   a[i] = GD.random(512);

 // Load the JPG into handle 1, *above* the assets in memory
 GD.BitmapHandle(1);
 GD.cmd_loadimage(ASSETS_END, 0);
 GD.load("healsky3.jpg");
}

void loop()
{
 GD.ClearColorRGB(0x000050);
 GD.Clear();
 GD.Begin(BITMAPS);
 GD.Vertex2ii(0, 0, 1);
 for (int i = 0; i < 256; i++) {
   GD.ColorRGB(i, i, i);
   GD.Vertex2ii(a[i], i, WALK_HANDLE, (a[i] >> 2) & 7);
   a[i] = (a[i] + 1) & 511;
 }
 GD.swap();
}


[jamesbowman]

And going a bit further with a second JPG:



#include <EEPROM.h>
#include <SPI.h>
#include <GD2.h>

static int a[256];

#include "walk_assets.h"

void setup()
{
 GD.begin();
 LOAD_ASSETS();
 for (int i = 0; i < 256; i++)
   a[i] = GD.random(512);

 // Load the JPG into handle 1, *above* the assets in memory
 GD.BitmapHandle(1);
 GD.cmd_loadimage(ASSETS_END, 0);
 GD.load("healsky3.jpg");

 // Another JPG into handle 2, address '-1' tells the loader to append into memory
 GD.BitmapHandle(2);
 GD.cmd_loadimage(-1, 0);
 GD.load("sunrise.jpg");
}

void loop()
{
 GD.ClearColorRGB(0x000050);
 GD.Clear();
 GD.Begin(BITMAPS);
 GD.Vertex2ii(0, 0, 1);      // draw 'healsky3.jpg'
 GD.Vertex2ii(100, 100, 2);  // draw 'sunrise.jpg'
 for (int i = 0; i < 256; i++) {
   GD.ColorRGB(i, i, i);
   GD.Vertex2ii(a[i], i, WALK_HANDLE, (a[i] >> 2) & 7);
   a[i] = (a[i] + 1) & 511;
 }
 GD.swap();
}


[NeX]

Perfect thanks James, ASSETS_END was the missing piece to the puzzle, thanks!

[tftlcdcyg]

Is it possible to load two group of assets? for example iconsb.h and iconsc.h
icons.rar (41.97 KB)

[tftlcdcyg]

sorry, answer in bad post