Hello !
I am currently porting an amiga game to linux/sdl.Yesterday I compiled
the whole thing new and realized that some blittings
doesn’t succeed anymore, which befor I installed SDL 1.2.0 was okay.
If I do it by directly drawing each pixel to the screen it is okay.
But a blit would be nicer,cause if the fast asm blitters.
Anyone realized the same situation ???
Regards
paines
I am currently porting an amiga game to linux/sdl.Yesterday I compiled
the whole thing new and realized that some blittings
doesn’t succeed anymore, which befor I installed SDL 1.2.0 was okay.
please write a minimal compilable example that shows the problem
I am currently porting an amiga game to linux/sdl.Yesterday I compiled
the whole thing new and realized that some blittings
doesn’t succeed anymore, which befor I installed SDL 1.2.0 was okay.please write a minimal compilable example that shows the problem
Is your surface still locked when you are trying to blit maybe?
Matthijs
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This is a multi-part message in MIME format.
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Mattias Engdeg?rd wrote:
I am currently porting an amiga game to linux/sdl.Yesterday I compiled
the whole thing new and realized that some blittings
doesn’t succeed anymore, which befor I installed SDL 1.2.0 was okay.please write a minimal compilable example that shows the problem
Attached you will fin the example.Sorry for the delay.Was on tour for my
company.
Best regards
Anes
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name="main.c"
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filename=“main.c”
#include <string.h>
#include <SDL/SDL.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
static SDL_Surface *screen;
char *data;
char *palette;
int opengfx()
{
screen=NULL;
if(SDL_Init(SDL_INIT_VIDEO)<0)
{
fprintf(stderr,"Sorry unable to Init SDL. SDL: %s\n",SDL_GetError());
return -1;
}
screen=SDL_SetVideoMode(640,480,8,SDL_HWSURFACE|SDL_HWPALETTE);
atexit(SDL_Quit);
if(!screen)
{
fprintf(stderr,"Sorry.Unable to desired Video Mode.SDL: %s\n",SDL_GetError());
return -1;
}
return 0;
}
void closegfx()
{
SDL_Quit();
}
int LoadPic(char *name)
{
int fin=-1;
fin=open(name,O_RDONLY);
if(!fin)
{
fprintf(stderr,"Sorry.Unable to open file %s.\n",name);
return -1;
}
data=(char*)malloc(64000);
palette=(char*)malloc(768);
if(data && palette)
{
char temp[310];
read(fin,temp,310);
read(fin,palette,768);
read(fin,data,64000);
}else
{
fprintf(stderr,"Sorry unable to get enough memory.\n");
close(fin);
return -1;
}
close(fin);
return 0;
}
int main(int argc,char *argv[])
{
SDL_Event event;
int done;
int rc1=-1,rc2=-1;
int i,j;
int bpp;
Uint8 *ptr,*ptr2;
SDL_Surface *picture=NULL;
SDL_Rect rect;
SDL_Color *colors;
int ncolors=256;
opengfx();
rc1=LoadPic("pinguin");
if(rc1!=0)
fprintf(stderr,"Error with Reading File.\n");
//Direct draw to surface, which works
//to enable replace #if 0 with #if 1
//and comment the Blit a bit down
#if 0
SDL_LockSurface(screen);
bpp=screen->format->BytesPerPixel;
ptr=(Uint8*)screen->pixels;
for(i=0;i<320;i++)
for(j=0;j<200;j++)
ptr[j*screen->pitch+i*bpp]=data[j*320+i];
SDL_UnlockSurface(screen);
#endif
picture=SDL_CreateRGBSurface(SDL_HWSURFACE|SDL_HWPALETTE,320,200,8,0,0,0,0);
if(!picture)
{
fprintf(stderr,"Sorry. Unable to make Picture Surface.SDL: %s\n",SDL_GetError());
goto end;
}
colors=(SDL_Color*)malloc(ncolors*sizeof(SDL_Color));
for(i=0;i<256;i++)
{
colors[i].r=data[i*3];
colors[i].g=data[i*3+1];
colors[i].b=data[i*3+2];
}
rc2=SDL_SetColors(picture,colors,0,256);
rc1=SDL_SetColors(screen,colors,0,256);
fprintf(stderr,"Color setting for screen was %d and for picture was %d.\n",rc1,rc2);
//Preparing the blit
//not sure if i made this correct
SDL_LockSurface(picture);
ptr2=(Uint8*)picture->pixels;
for(i=0;i<200;++i)
{
//Funny, with this it works !!!
// memset(ptr2,(i*255)/200,320);
memcpy(ptr,data,320);
ptr2+=320;
data+=320;
}
SDL_UnlockSurface(picture);
rect.x=0;
rect.y=0;
rect.w=320;
rect.h=200;
rc1=SDL_BlitSurface(picture,NULL,screen,&rect);
fprintf(stderr,"Blitting was %d.\n",rc1);
SDL_UpdateRects(screen,1,&rect);
done=0;
while(!done)
{
while(SDL_PollEvent(&event))
{
switch(event.type)
{
case SDL_KEYUP:
case SDL_KEYDOWN:
{
Uint8* keys;
keys=SDL_GetKeyState(NULL);
if(keys[SDLK_ESCAPE]==SDL_PRESSED)
{
done=1;
break;
}
}
}
}
}
end:
SDL_FreeSurface(picture);
free(data);
free(palette);
closegfx();
return 0;
}
--------------EBA6C974CF47D7E826FD9CDA–
Anes Lihovac wrote:
Mattias Engdeg?rd wrote:
I am currently porting an amiga game to linux/sdl.Yesterday I compiled
the whole thing new and realized that some blittings
doesn’t succeed anymore, which befor I installed SDL 1.2.0 was okay.please write a minimal compilable example that shows the problem
Attached you will fin the example.Sorry for the delay.Was on tour for my
company.Best regards
Anes
#include <string.h>
#include <SDL/SDL.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>static SDL_Surface *screen;
char *data;
char *palette;int opengfx()
{
screen=NULL;if(SDL_Init(SDL_INIT_VIDEO)<0) { fprintf(stderr,"Sorry unable to Init SDL. SDL: %s\n",SDL_GetError()); return -1; } screen=SDL_SetVideoMode(640,480,8,SDL_HWSURFACE|SDL_HWPALETTE); atexit(SDL_Quit); if(!screen) { fprintf(stderr,"Sorry.Unable to desired Video Mode.SDL: %s\n",SDL_GetError()); return -1; } return 0;}
void closegfx()
{
SDL_Quit();
}int LoadPic(char *name)
{
int fin=-1;fin=open(name,O_RDONLY); if(!fin) { fprintf(stderr,"Sorry.Unable to open file %s.\n",name); return -1; } data=(char*)malloc(64000); palette=(char*)malloc(768); if(data && palette) { char temp[310]; read(fin,temp,310); read(fin,palette,768); read(fin,data,64000); }else { fprintf(stderr,"Sorry unable to get enough memory.\n"); close(fin); return -1; } close(fin); return 0;}
int main(int argc,char *argv[])
{
SDL_Event event;
int done;
int rc1=-1,rc2=-1;
int i,j;
int bpp;
Uint8 *ptr,*ptr2;
SDL_Surface *picture=NULL;
SDL_Rect rect;
SDL_Color *colors;
int ncolors=256;opengfx(); rc1=LoadPic("pinguin"); if(rc1!=0) fprintf(stderr,"Error with Reading File.\n");//Direct draw to surface, which works
//to enable replace #if 0 with #if 1
//and comment the Blit a bit down
#if 0
SDL_LockSurface(screen);
bpp=screen->format->BytesPerPixel;
ptr=(Uint8*)screen->pixels;for(i=0;i<320;i++) for(j=0;j<200;j++) ptr[j*screen->pitch+i*bpp]=data[j*320+i]; SDL_UnlockSurface(screen);#endif
picture=SDL_CreateRGBSurface(SDL_HWSURFACE|SDL_HWPALETTE,320,200,8,0,0,0,0); if(!picture) { fprintf(stderr,"Sorry. Unable to make Picture Surface.SDL: %s\n",SDL_GetError()); goto end; } colors=(SDL_Color*)malloc(ncolors*sizeof(SDL_Color)); for(i=0;i<256;i++) { colors[i].r=data[i*3]; colors[i].g=data[i*3+1]; colors[i].b=data[i*3+2]; } rc2=SDL_SetColors(picture,colors,0,256); rc1=SDL_SetColors(screen,colors,0,256); fprintf(stderr,"Color setting for screen was %d and for picture was %d.\n",rc1,rc2);//Preparing the blit
//not sure if i made this correct
SDL_LockSurface(picture);
ptr2=(Uint8*)picture->pixels;
for(i=0;i<200;++i)
{
//Funny, with this it works !!!
// memset(ptr2,(i*255)/200,320);
memcpy(ptr,data,320);
Okay okay. This should be
memcpy(ptr,data,320);
Then it works fine.
Thanks all.
Best regards
paines>
ptr2+=320; data+=320; } SDL_UnlockSurface(picture); rect.x=0; rect.y=0; rect.w=320; rect.h=200; rc1=SDL_BlitSurface(picture,NULL,screen,&rect); fprintf(stderr,"Blitting was %d.\n",rc1); SDL_UpdateRects(screen,1,&rect); done=0; while(!done) { while(SDL_PollEvent(&event)) { switch(event.type) { case SDL_KEYUP: case SDL_KEYDOWN: { Uint8* keys; keys=SDL_GetKeyState(NULL); if(keys[SDLK_ESCAPE]==SDL_PRESSED) { done=1; break; } } } } }end:
SDL_FreeSurface(picture); free(data); free(palette); closegfx(); return 0;}
I really should read my stuff before posting.
I meant
memcpy(ptr2,data,320);
Sorry for the last post.
Best regards
paines