forums.ps2dev.org Forum Index forums.ps2dev.org
Homebrew PS2, PSP & PS3 Development Discussions
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

32 bits texturing problem !!

 
Post new topic   Reply to topic    forums.ps2dev.org Forum Index -> PSP Development
View previous topic :: View next topic  
Author Message
Shito



Joined: 11 May 2005
Posts: 21
PostPosted: Tue Jul 19, 2005 5:51 am    Post subject: 32 bits texturing problem !! Reply with quote
Ok guys, been playing around a bit with the psp sdk for the last days. I've been able to "blit" a 16-bits texture on screen. Now all I wanna do is doing the same, but with a 32-bits texture.
"Ok, easy, just need to convert my bitmap image to 32 bit values now, and let know the psp i'm using a 32 bits texture, mwhahahah".
Well, doesn't work, and obviously I'm missing a very obvious thing there. :/

So, time for the boring part : TEH code !!

Here's my GU initialisation :
Code:
#define BUF_WIDTH (512)
#define SCR_WIDTH (480)
#define SCR_HEIGHT (272)
#define PIXEL_SIZE (4) /* change this if you change to another screenmode */
#define FRAME_SIZE (BUF_WIDTH * SCR_HEIGHT * PIXEL_SIZE)
#define ZBUF_SIZE (BUF_WIDTH SCR_HEIGHT * 2) /* zbuffer seems to be 16-bit? */

   sceGuInit();

   // setup
   sceGuStart(GU_DIRECT,list);

   sceGuDrawBuffer(GU_PSM_8888,(void*)0,BUF_WIDTH);
   sceGuDispBuffer(SCR_WIDTH,SCR_HEIGHT,(void*)FRAME_SIZE,BUF_WIDTH);
   sceGuDepthBuffer((void*)(FRAME_SIZE*2),BUF_WIDTH);
   sceGuOffset(2048 - (SCR_WIDTH/2),2048 - (SCR_HEIGHT/2));
   sceGuViewport(2048,2048,SCR_WIDTH,SCR_HEIGHT);
   sceGuDepthRange(0xc350,0x2710);
   sceGuScissor(0,0,SCR_WIDTH,SCR_HEIGHT);
   sceGuEnable(GU_SCISSOR_TEST);
   sceGuFrontFace(GU_CW);
   sceGuEnable(GU_TEXTURE_2D);
   sceGuEnable(GU_BLEND);
   sceGuClear(GU_COLOR_BUFFER_BIT|GU_DEPTH_BUFFER_BIT);
   sceGuFinish();
   sceGuSync(0,0);

   sceDisplayWaitVblankStart();
   sceGuDisplay(GU_TRUE);


The paint function :
Code:
void paint(long dt)
{
   sceGuStart(GU_DIRECT,list);

      // clear screen
      sceGuClearColor(0xff000000);
      sceGuClear(GU_COLOR_BUFFER_BIT|GU_DEPTH_BUFFER_BIT);

      // setup blend-mode
      sceGuBlendFunc(GU_ADD,GU_SRC_ALPHA,GU_ONE_MINUS_SRC_ALPHA,0,0);

      sceGuColor(0xffffffff);

      // Setup and render Tile Map
      setupTileMapTexture(&tilemap) ;
      bltTileMapRot90(&tilemap) ;

      // FPS
      pspDebugScreenSetXY(0,0);
      pspDebugScreenPrintf("fps=%ld", 1000/dt);

   sceGuFinish();
   sceGuSync(0,0);

//   sceDisplayWaitVblankStart();
   sceGuSwapBuffers();
}


Initialisation of the tilemap texture :
Code:
void setupTileMapTexture(tilemap_t* tmap)
{
   sceGuTexMode(GU_PSM_8888,0,0,0);
   sceGuTexImage(0,tmap->image_width,tmap->image_height,tmap->image_width,(tmap->image));
   sceGuTexFunc(GU_TFX_REPLACE,GU_TCC_RGBA);
   sceGuTexFilter(GU_NEAREST,GU_NEAREST);
   sceGuTexScale(1,1);
   sceGuTexOffset(0,0);
}


And finally, the tilemap drawing function :
Code:
void bltTileMapRot90(tilemap_t* tmap)
{
   int i,j, index, nbprim ;
   struct Vertex* vertices = (struct Vertex*)sceGuGetMemory(2 * tmap->width * tmap->height * sizeof(struct Vertex));

   index = 0 ;
   nbprim = 0 ;
   for (i=0; i<tmap->width; i++)
      for (j=0; j<tmap->height; j++)
      {
         int tile = tmap->tilemap[i+j*tmap->width] ;
         int tilex = (tile-1)%tmap->tiles_width ;
         int tiley = (tile-1)/tmap->tiles_width ;

         if (tile < 0)
         {
            // Animated Tile
            int atile = -tile-1 ;
            
            if (atile < tmap->anims_number)
            {
               atile = tmap->animated_tiles[atile].frames[tmap->animated_tiles[atile].curr_frame] ;
               tilex = (atile-1)%tmap->tiles_width ;
               tiley = (atile-1)/tmap->tiles_width ;

               vertices[index<<1].u = tilex*tmap->frame_width; vertices[index<<1].v = tiley*tmap->frame_height;
               vertices[index<<1].x = SCREENWIDTH-(tmap->y>>16)-j*tmap->frame_width; vertices[index<<1].y = (tmap->x>>16)+i*tmap->frame_height; vertices[index<<1].z = 0;
               vertices[(index<<1)+1].u = vertices[index<<1].u+tmap->frame_width; vertices[(index<<1)+1].v = vertices[index<<1].v+tmap->frame_height;
               vertices[(index<<1)+1].x = vertices[index<<1].x-tmap->frame_height; vertices[(index<<1)+1].y = vertices[index<<1].y+tmap->frame_width; vertices[(index<<1)+1].z = 0;
               index++ ;
               nbprim++ ;
            }
         }
         else if (tile != 0)
         {
            vertices[index<<1].u = tilex*tmap->frame_width; vertices[index<<1].v = tiley*tmap->frame_height;
            vertices[index<<1].x = SCREENWIDTH-(tmap->y>>16)-j*tmap->frame_width; vertices[index<<1].y = (tmap->x>>16)+i*tmap->frame_height; vertices[index<<1].z = 0;
            vertices[(index<<1)+1].u = vertices[index<<1].u+tmap->frame_width; vertices[(index<<1)+1].v = vertices[index<<1].v+tmap->frame_height;
            vertices[(index<<1)+1].x = vertices[index<<1].x-tmap->frame_height; vertices[(index<<1)+1].y = vertices[index<<1].y+tmap->frame_width; vertices[(index<<1)+1].z = 0;
            index++ ;
            nbprim++ ;
         }
      }

   sceGuDrawArray(GU_SPRITES,GU_TEXTURE_32BITF|GU_COLOR_8888|GU_VERTEX_32BITF|GU_TRANSFORM_2D,2 * nbprim,0,vertices);
}


Now all i can get with this is a black screen, but going the same speed as when I blit my 16-bits tilemap, so I guess it *is* rendering something, and I just forgot a stupid flag or something somewhere.
Can anyone see my big and shamefull and evident mistake ?? ^^
Back to top
View user's profile Send private message
Shito



Joined: 11 May 2005
Posts: 21
PostPosted: Tue Jul 19, 2005 6:40 am    Post subject: Reply with quote
Ok, got it displaying something, just needed to make my u,v,x,y and z floats in my vertex structure, silly me !!
The colors are way wrong, though.
Do you guys know if in 32 bits the format is ARGB ?
Would look weird as it seems to be ABGR in 16 bits. :/
Back to top
View user's profile Send private message
Shito



Joined: 11 May 2005
Posts: 21
PostPosted: Tue Jul 19, 2005 6:57 am    Post subject: Reply with quote
(And 3 in a row)
Well, that was it, ARGB in 32 bits mode.
Now, why is it working in ABGR in 16 bits ?? °__°
What the fuck am i not understanding there ??
Back to top
View user's profile Send private message
sexdwarf



Joined: 14 Jul 2005
Posts: 34
PostPosted: Tue Jul 19, 2005 7:01 am    Post subject: Reply with quote
Shito wrote:
(And 3 in a row)
Well, that was it, ARGB in 32 bits mode.
Now, why is it working in ABGR in 16 bits ?? °__°
What the fuck am i not understanding there ??


hehe wish i could answer that question - any chance of you sharing the working code?
_________________
...isn't it nice, sugar and spice...
...luring disco dollies to a life of vice...
Back to top
View user's profile Send private message
Shito



Joined: 11 May 2005
Posts: 21
PostPosted: Tue Jul 19, 2005 7:23 am    Post subject: Reply with quote
Well, pretty much what I posted up here, with
Code:
struct Vertex
{
   float u, v;
   unsigned int color;
   float x, y, z;
};

as my vertex structure, and
Code:
static unsigned int __attribute__((aligned(32))) tiles01_image[] =
{ ...

as my image.

Might get working on a little game from here, be sure I'll make the sources available if I ever get to something. ^^
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    forums.ps2dev.org Forum Index -> PSP Development All times are GMT + 10 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group