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lego
Joined: 17 Oct 2008
Posts: 43
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 Posted: Tue Sep 29, 2009 11:30 pm Post subject: Strange pspgu behaviour |
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Hi.
I'm experimenting with GU. Now I have a simple code, that get my some strange result. First triangle is drawn nice, but a second one, which is dynamically allocated, isn't drawn. If I change an array from dynamically allocatable to a statically allocatable one, then all triangles are drawn well.
| Code: |
#include <malloc.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <SDL/SDL.h>
#include <SDL/SDL_ttf.h>
/*
#include <GL/gl.h>
#include <GL/glu.h>
*/
#include <math.h>
#include <pspkernel.h>
#include <pspdebug.h>
#include <pspthreadman.h>
#include <pspdisplay.h>
#include <pspnet_inet.h>
#include <pspnet.h>
#include <psputility.h>
#include <pspgu.h>
#include <pspgum.h>
#include <psputils.h>
PSP_MODULE_INFO("ogl", 0, 3, 5);
PSP_MAIN_THREAD_ATTR(PSP_THREAD_ATTR_USER | PSP_THREAD_ATTR_VFPU);
PSP_HEAP_SIZE_KB(-1024);
PSP_MAIN_THREAD_STACK_SIZE_KB(1024);
#define printf pspDebugScreenPrintf
#define BUF_WIDTH (512)
#define SCR_WIDTH (480)
#define SCR_HEIGHT (272)
void *dList;// display List, used by sceGUStart
void *fbp0;// frame buffer
typedef struct {
float x, y, z;
} Vertex_t;
Vertex_t __attribute__((aligned(16))) triangle[3] =
{
{ 100, 100, 0 }, { 200, 200, 0}, { 100, 200, 0}
} ;
Vertex_t *vv;
/*************************************************************
* EXIT CALLBACK STUFF
*************************************************************/
/* Exit callback */
int exit_callback(int arg1, int arg2, void *common) {
sceKernelExitGame();
return 0;
}
/* Callback thread */
int CallbackThread(SceSize args, void *argp) {
int cbid;
cbid = sceKernelCreateCallback("Exit Callback", exit_callback, NULL);
sceKernelRegisterExitCallback(cbid);
sceKernelSleepThreadCB();
return 0;
}
/* Sets up the callback thread and returns its thread id */
int SetupCallbacks(void) {
int thid = 0;
thid = sceKernelCreateThread("update_thread", CallbackThread, 0x11, 0xFA0, 0, 0);
if(thid >= 0) {
sceKernelStartThread(thid, 0, 0);
}
return thid;
}
void initGU( void )
{
// Init GU
sceGuInit();
sceGuStart( GU_DIRECT, dList );
// Set Buffers
sceGuDrawBuffer( GU_PSM_8888, fbp0, BUF_WIDTH );
sceGuDispBuffer( SCR_WIDTH, SCR_HEIGHT, (void*)0x88000, BUF_WIDTH);
sceGuDepthBuffer( (void*)0x110000, BUF_WIDTH);
sceGuOffset( 2048 - (SCR_WIDTH/2), 2048 - (SCR_HEIGHT/2));
sceGuViewport( 2048, 2048, SCR_WIDTH, SCR_HEIGHT);
sceGuDepthRange( 65535, 0);
// Set Render States
sceGuScissor( 0, 0, SCR_WIDTH, SCR_HEIGHT);
sceGuEnable( GU_SCISSOR_TEST );
sceGuDepthFunc( GU_GEQUAL );
sceGuEnable( GU_DEPTH_TEST );
sceGuFrontFace( GU_CW );
sceGuShadeModel( GU_SMOOTH );
sceGuEnable( GU_CULL_FACE );
sceGuEnable( GU_CLIP_PLANES );
sceGuFinish();
sceGuSync(0,0);
sceDisplayWaitVblankStart();
sceGuDisplay(GU_TRUE);
// finish
}
void setupProjection( void )
{
// setup matrices for the triangle
sceGumMatrixMode(GU_PROJECTION);
sceGumLoadIdentity();
sceGumPerspective( 75.0f, 16.0f/9.0f, 0.5f, 1000.0f);
sceGumMatrixMode(GU_VIEW);
sceGumLoadIdentity();
sceGuClearColor( GU_COLOR( 0.0f, 0.0f, 0.0f, 1.0f ) );
sceGuClearDepth(0);
sceGumMatrixMode(GU_MODEL);
sceGumLoadIdentity();
}
int main(void)
{
SetupCallbacks();
pspDebugScreenInit();
if ( TTF_Init() ) {
fprintf(stderr, "TTF Error: %s\n", TTF_GetError());
exit(1);
}
atexit(TTF_Quit);
dList = memalign(16, 524288);
initGU();
setupProjection();
vv = (Vertex_t*)memalign(16, 3 * sizeof(Vertex_t));
vv[0].x = 100;
vv[0].y = 100;
vv[0].z = 0;
vv[1].x = 200;
vv[1].y = 100;
vv[1].z = 0;
vv[2].x = 200;
vv[2].y = 200;
vv[2].z = 0;
sceGuStart(GU_DIRECT, dList);
sceGuClear(GU_COLOR_BUFFER_BIT | GU_DEPTH_BUFFER_BIT);
sceGuColor(GU_COLOR(1, 1, 1, 0));
sceGumDrawArray(GU_TRIANGLES, GU_VERTEX_32BITF | GU_TRANSFORM_2D,
3, 0, triangle);
sceGuColor(GU_COLOR(0, 0, 1, 0));
sceGumDrawArray(GU_TRIANGLES, GU_VERTEX_32BITF | GU_TRANSFORM_2D,
3, 0, tr);
sceGuFinish();
sceGuSync(0, 0);
sceDisplayWaitVblankStart();
sceGuSwapBuffers();
sceKernelSleepThreadCB();
return 0;
}
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What do I wrong :-)? |
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psPea
Joined: 01 Sep 2007
Posts: 64
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| Posted: Tue Sep 29, 2009 11:51 pm Post subject: |
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It's probably a cache issue,
try sceKernelDCacheWritebackInvaidateRange on the vertices.
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a_noob
Joined: 17 Sep 2006
Posts: 97
Location: _start: jr 0xDEADBEEF
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| Posted: Wed Sep 30, 2009 1:07 am Post subject: |
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you can avoid the cache problem by using local GU memory (from the display list). sceGuGetMemory(int size); (works just like malloc) You dont need to free this memory or write it back. However it is invalid at the end of the frame. Also if you choose you use malloc. It is 16bit aligned so no need to use memalign.
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lego
Joined: 17 Oct 2008
Posts: 43
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| Posted: Wed Sep 30, 2009 1:28 am Post subject: |
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| a_noob wrote: | | you can avoid the cache problem by using local GU memory (from the display list). sceGuGetMemory(int size); (works just like malloc) You dont need to free this memory or write it back. However it is invalid at the end of the frame. Also if you choose you use malloc. It is 16bit aligned so no need to use memalign. |
sceGuGetMemory() don't work for me. With or without sceKernelDcacheWritebackInvalidateRage() it give me nothing...
My changed code part:
| Code: |
vv = (Vertex_t*)sceGuGetMemory(3 * sizeof(Vertex_t));
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instead of old:
| Code: |
vv = (Vertex_t*)memalign(16, 3 * sizeof(Vertex_t));
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lego
Joined: 17 Oct 2008
Posts: 43
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| Posted: Wed Sep 30, 2009 1:36 am Post subject: |
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| psPea wrote: | It's probably a cache issue,
try sceKernelDCacheWritebackInvaidateRange on the vertices. |
Thanks!
It's work. sceKernelDCacheWritebackInvaidateRange(vv, 3 * sizeof(Vertex_t)) help me.
Could you help me to understand a cache work?
May i call this function after malloc() or i need to call it after i filled up an array with right data? How it works?
What a difference in work between this functions:
- sceKernelDcacheWritebackAll
- sceKernelDcacheWritebackInvalidateAll
- sceKernelDcacheWritebackRange
- sceKernelDcacheWritebackInvalidateRange
- sceKernelDcacheInvalidateRange
Where do I call it? |
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lego
Joined: 17 Oct 2008
Posts: 43
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| Posted: Wed Sep 30, 2009 2:14 am Post subject: |
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| lego wrote: |
May i call this function after malloc() or i need to call it after i filled up an array with right data?
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Before an array data is filled, sceKernelDcacheWritebackInvalidateRange() don't give a needed result :-). So, this question has droped off. |
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Insert_witty_name
Joined: 10 May 2006
Posts: 376
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| Posted: Thu Oct 01, 2009 7:24 am Post subject: |
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For the cache problem, see the first paragraph here: http://wiki.ps2dev.org/psp:ge_faq
sceGuGetMemory() should work fine. I would address this issue instead of allocating vertex memory and clearing the cache. |
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a_noob
Joined: 17 Sep 2006
Posts: 97
Location: _start: jr 0xDEADBEEF
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| Posted: Thu Oct 01, 2009 8:23 am Post subject: |
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you need to call sceGuGetMemory within your GU render context between sceGuStart and sceGuFinish
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'ºOo.oOº' |
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lego
Joined: 17 Oct 2008
Posts: 43
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| Posted: Fri Oct 02, 2009 12:03 am Post subject: |
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| Insert_witty_name wrote: | For the cache problem, see the first paragraph here: http://wiki.ps2dev.org/psp:ge_faq
sceGuGetMemory() should work fine. I would address this issue instead of allocating vertex memory and clearing the cache. |
Many thanks.
Very useful link. |
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lego
Joined: 17 Oct 2008
Posts: 43
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| Posted: Fri Oct 02, 2009 1:16 am Post subject: |
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| a_noob wrote: | | you need to call sceGuGetMemory within your GU render context between sceGuStart and sceGuFinish |
Thank you for reply.
Now it works, but I have some strange result - http://forums.ps2dev.org/viewtopic.php?t=12480 . |
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