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proof of concept for tile based stuff (performance test).

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Fixed 10x10 grid, so panning of 10x10 view around a real map yet.
This commit is contained in:
stevenhowes
2021-04-03 22:20:27 +01:00
parent 19219dcf58
commit cd49a33a46
9 changed files with 200 additions and 74 deletions
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!TheEsc/c/Graphics
+39 -59
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@@ -8,10 +8,12 @@ extern _kernel_swi_regs outreg;
extern unsigned char *buffer;
extern unsigned char *fontbuffer;
extern unsigned char *tilebuffer;
int screen = 1;
// Loads sprite file into buffer
void load_sprites(char* filename)
void load_sprites(char* filename, unsigned char **buffername)
{
int length;
@@ -38,74 +40,24 @@ void load_sprites(char* filename)
}
// Attempt malloc, die if we cant
buffer = (unsigned char *) malloc(length + 4);
*buffername = (unsigned char *) malloc(length + 4);
if(buffer==NULL)
if(buffername==NULL)
{
printf("Couldn't malloc %i bytes for sprite buffer",length);
exit(0);
}
// Store size and other info as required for SpriteOp 9 to init sprite area
*(unsigned int *)buffer = length + 4;
*(unsigned int *)(buffer + 4) = 16;
*(unsigned int *)*buffername = length + 4;
*(unsigned int *)(*buffername + 4) = 16;
inreg.r[0] = 256+9;
inreg.r[1] = (unsigned int) buffer;
inreg.r[1] = (unsigned int) *buffername;
_kernel_swi(OS_SpriteOp,&inreg,&outreg);
// Load sprite file into buffer
inreg.r[0] = 256+10;
inreg.r[1] = (int) buffer;
inreg.r[2] = (int) filename;
_kernel_swi(OS_SpriteOp,&inreg,&outreg);
}
// Loads sprite file into buffer
void load_font(char* filename)
{
int length;
// Attempt to get file info
inreg.r[0] = 13;
inreg.r[1] = (int) filename;
_kernel_swi(OS_File,&inreg,&outreg);
// Length will be in R4 if it exists
length = outreg.r[4];
// If it's <1 it's fil not found
if(outreg.r[0] < 1)
{
printf("Sprite file %s not found",filename);
exit(0);
}
// Stops us trying to mallocsomething mad if file is too big.
if(length > 200000)
{
printf("Sprite file %s seems unreasonably large at %i bytes",filename, length);
exit(0);
}
// Attempt malloc, die if we cant
fontbuffer = (unsigned char *) malloc(length + 4);
if(fontbuffer==NULL)
{
printf("Couldn't malloc %i bytes for sprite buffer",length);
exit(0);
}
// Store size and other info as required for SpriteOp 9 to init sprite area
*(unsigned int *)fontbuffer = length + 4;
*(unsigned int *)(fontbuffer + 4) = 16;
inreg.r[0] = 256+9;
inreg.r[1] = (unsigned int) fontbuffer;
_kernel_swi(OS_SpriteOp,&inreg,&outreg);
// Load sprite file into buffer
inreg.r[0] = 256+10;
inreg.r[1] = (int) fontbuffer;
inreg.r[1] = (int) *buffername;
inreg.r[2] = (int) filename;
_kernel_swi(OS_SpriteOp,&inreg,&outreg);
}
@@ -190,10 +142,21 @@ void draw_letter(char* spritename,int x, int y)
inreg.r[2] = (int) spritename;
inreg.r[3] = x;
inreg.r[4] = y;
inreg.r[5] = 8; // GCOL dest=source and sprite mask
inreg.r[5] = 8;
_kernel_swi(OS_SpriteOp,&inreg,&outreg);
}
void draw_tile(char* spritename,int x, int y)
{
// SpriteOp 34 to put sprite at a location
inreg.r[0] = 256+34;
inreg.r[1] = (int) tilebuffer;
inreg.r[2] = (int) spritename;
inreg.r[3] = x;
inreg.r[4] = y;
inreg.r[5] = 0;
_kernel_swi(OS_SpriteOp,&inreg,&outreg);
}
void draw_spritetext(char* text, int x, int y)
{
@@ -214,9 +177,9 @@ void draw_spritetext(char* text, int x, int y)
{
case 't':
case 'i':
case 'y':
case '.':
case ',':
case 'y':
currentx += 12 + 4;
break;
case '\'':
@@ -318,6 +281,23 @@ void screen_flipbuffer()
}
void screen_nobuffer()
{
// Hardware
inreg.r[0] = 113;
inreg.r[1] = 1;
_kernel_swi(OS_Byte,&inreg,&outreg);
// Drivers
inreg.r[0] = 112;
inreg.r[1] = 1;
_kernel_swi(OS_Byte,&inreg,&outreg);
inreg.r[0] = 19;
_kernel_swi(OS_Byte,&inreg,&outreg);
}
void screen_clear()
{
inreg.r[0] = 12;