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blit.c
161 lines (134 loc) · 4.26 KB
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blit.c
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/*
PSP VSH 24bpp text bliter
*/
#include <libk/stdarg.h>
#include <libk/stdio.h>
#include <libk/string.h>
#include "blit.h"
#define ALPHA_BLEND 1
extern unsigned char msx[];
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
static int pwidth, pheight, bufferwidth, pixelformat;
static unsigned int* vram32;
static uint32_t fcolor = 0x00ffffff;
static uint32_t bcolor = 0xff000000;
#if ALPHA_BLEND
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
static uint32_t adjust_alpha(uint32_t col)
{
uint32_t alpha = col>>24;
uint8_t mul;
uint32_t c1,c2;
if(alpha==0) return col;
if(alpha==0xff) return col;
c1 = col & 0x00ff00ff;
c2 = col & 0x0000ff00;
mul = (uint8_t)(255-alpha);
c1 = ((c1*mul)>>8)&0x00ff00ff;
c2 = ((c2*mul)>>8)&0x0000ff00;
return (alpha<<24)|c1|c2;
}
#endif
#define printf ksceDebugPrintf
/////////////////////////////////////////////////////////////////////////////
// blit text
/////////////////////////////////////////////////////////////////////////////
void blit_set_color(int fg_col,int bg_col)
{
fcolor = fg_col;
bcolor = bg_col;
}
/////////////////////////////////////////////////////////////////////////////
// blit text
/////////////////////////////////////////////////////////////////////////////
int blit_string(int sx,int sy,const char *msg)
{
int x,y,p;
int offset;
char code;
unsigned char font;
uint32_t fg_col,bg_col;
#if ALPHA_BLEND
uint32_t col,c1,c2;
uint32_t alpha;
fg_col = adjust_alpha(fcolor);
bg_col = adjust_alpha(bcolor);
#else
fg_col = fcolor;
bg_col = bcolor;
#endif
//Kprintf("MODE %d WIDTH %d\n",pixelformat,bufferwidth);
if( (bufferwidth==0) || (pixelformat!=0)) return -1;
for(x=0;msg[x] && x<(pwidth/16);x++)
{
code = msg[x] & 0x7f; // 7bit ANK
for(y=0;y<8;y++)
{
offset = (sy+(y*2))*bufferwidth + sx+x*16;
font = y>=7 ? 0x00 : msx[ code*8 + y ];
for(p=0;p<8;p++)
{
#if ALPHA_BLEND
col = (font & 0x80) ? fg_col : bg_col;
alpha = col>>24;
if(alpha==0)
{
ksceKernelMemcpyKernelToUser((uintptr_t)(&vram32[offset]), &col, sizeof(col));
ksceKernelMemcpyKernelToUser((uintptr_t)(&vram32[offset + 1]), &col, sizeof(col));
ksceKernelMemcpyKernelToUser((uintptr_t)(&vram32[offset + bufferwidth]), &col, sizeof(col));
ksceKernelMemcpyKernelToUser((uintptr_t)(&vram32[offset + bufferwidth + 1]), &col, sizeof(col));
}
else if(alpha!=0xff)
{
ksceKernelMemcpyUserToKernel(&c2, (uintptr_t)(vram32[offset]), sizeof(unsigned int));
c1 = c2 & 0x00ff00ff;
c2 = c2 & 0x0000ff00;
c1 = ((c1*alpha)>>8)&0x00ff00ff;
c2 = ((c2*alpha)>>8)&0x0000ff00;
uint32_t color = (col&0xffffff) + c1 + c2;
ksceKernelMemcpyKernelToUser((uintptr_t)(vram32 + offset), &color, sizeof(uint32_t));
ksceKernelMemcpyKernelToUser((uintptr_t)(vram32 + offset + 1), &color, sizeof(uint32_t));
ksceKernelMemcpyKernelToUser((uintptr_t)(vram32 + offset + bufferwidth), &color, sizeof(uint32_t));
ksceKernelMemcpyKernelToUser((uintptr_t)(vram32 + offset + bufferwidth + 1), &color, sizeof(uint32_t));
}
#else
uint32_t color = (font & 0x80) ? fg_col : bg_col;
ksceKernelMemcpyKernelToUser((uintptr_t)(vram32 + offset + 1), &color, sizeof(uint32_t));
ksceKernelMemcpyKernelToUser((uintptr_t)(vram32 + offset + bufferwidth), &color, sizeof(uint32_t));
ksceKernelMemcpyKernelToUser((uintptr_t)(vram32 + offset + bufferwidth + 1), &color, sizeof(uint32_t));
#endif
font <<= 1;
offset+=2;
}
}
}
return x;
}
int blit_string_ctr(int sy,const char *msg)
{
int sx = (960 / 2) - (strlen(msg) * (16 / 2));
return blit_string(sx,sy,msg);
}
int blit_stringf(int sx, int sy, const char *msg, ...)
{
va_list list;
char string[512];
va_start(list, msg);
vsnprintf(string, 512, msg, list);
va_end(list);
return blit_string(sx, sy, string);
}
int blit_set_frame_buf(const SceDisplayFrameBuf *param)
{
pwidth = param->width;
pheight = param->height;
vram32 = param->base;
bufferwidth = param->pitch;
pixelformat = param->pixelformat;
if( (bufferwidth==0) || (pixelformat!=0)) return -1;
fcolor = 0x00ffffff;
bcolor = 0xff000000;
return 0;
}