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#include "../drivers/uart.h"
#include "../graphics/glyphs.h"
#include "../graphics/homer.h"
#include "../graphics/lfb.h"
#include "../graphics/mbox.h"
#define GRAPHICS_LFB_C
unsigned int width, height, pitch, isrgb; /* dimensions and channel order */
unsigned char *lfb; /* raw frame buffer address */
/**
* Set screen resolution to 1024x768
*/
void lfb_init(void)
{
mbox[0] = 35*4;
mbox[1] = MBOX_REQUEST;
mbox[2] = 0x48003; //set phy wh
mbox[3] = 8;
mbox[4] = 8;
mbox[5] = 1024; //FrameBufferInfo.width
mbox[6] = 768; //FrameBufferInfo.height
mbox[7] = 0x48004; //set virt wh
mbox[8] = 8;
mbox[9] = 8;
mbox[10] = 1024; //FrameBufferInfo.virtual_width
mbox[11] = 768; //FrameBufferInfo.virtual_height
mbox[12] = 0x48009; //set virt offset
mbox[13] = 8;
mbox[14] = 8;
mbox[15] = 0; //FrameBufferInfo.x_offset
mbox[16] = 0; //FrameBufferInfo.y.offset
mbox[17] = 0x48005; //set depth
mbox[18] = 4;
mbox[19] = 4;
mbox[20] = 32; //FrameBufferInfo.depth
mbox[21] = 0x48006; //set pixel order
mbox[22] = 4;
mbox[23] = 4;
mbox[24] = 1; //RGB, not BGR preferably
mbox[25] = 0x40001; //get framebuffer, gets alignment on request
mbox[26] = 8;
mbox[27] = 8;
mbox[28] = 4096; //FrameBufferInfo.pointer
mbox[29] = 0; //FrameBufferInfo.size
mbox[30] = 0x40008; //get pitch
mbox[31] = 4;
mbox[32] = 4;
mbox[33] = 0; //FrameBufferInfo.pitch
mbox[34] = MBOX_TAG_LAST;
//this might not return exactly what we asked for, could be
//the closest supported resolution instead
if(mbox_call(MBOX_CH_PROP) && mbox[20]==32 && mbox[28]!=0) {
mbox[28]&=0x3FFFFFFF; //convert GPU address to ARM address
width=mbox[5]; //get actual physical width
height=mbox[6]; //get actual physical height
pitch=mbox[33]; //get number of bytes per line
isrgb=mbox[24]; //get the actual channel order
lfb=(void*)((unsigned long)mbox[28]);
} else {
uart_string("Unable to set screen resolution to 1024x768x32\n");
}
}
void clear_screen(void)
{
unsigned char *ptr=lfb;
for(unsigned int y = 0; y < height; y++) {
for(unsigned int x = 0; x < width; x++) {
*(unsigned int*)ptr = 0x000000;
ptr += 4;
}
}
}
/**
* Show a picture
*/
void lfb_showpicture(void)
{
clear_screen();
unsigned int x,y;
unsigned char *ptr=lfb;
char *data=homer_data, pixel[4];
ptr = lfb + (height-homer_height)*pitch + (width-homer_width)*4;
for(y=0;y<homer_height;y++) {
for(x=0;x<homer_width;x++) {
HEADER_PIXEL(data, pixel);
// the image is in RGB. So if we have an RGB framebuffer, we can copy the pixels
// directly, but for BGR we must swap R (pixel[0]) and B (pixel[2]) channels.
*((unsigned int*)ptr)=isrgb ? *((unsigned int *)&pixel) : (unsigned int)(pixel[0]<<16 | pixel[1]<<8 | pixel[2]);
ptr+=4;
}
ptr+=pitch-homer_width*4;
}
}
void draw_cbyte(unsigned char lx, unsigned char ly, unsigned char letter, unsigned int c)
{
unsigned int x, y;
unsigned char* ptr = lfb;
ptr += (pitch*ly*GLYPH_Y+lx*4*GLYPH_X);
unsigned char ltr = (letter & 0xF) + 0x30;
if (ltr > 0x39) {
ltr += 7;
}
for(y=0; y<GLYPH_Y; y++) {
for(x=0; x<GLYPH_X; x++) {
if((0x80 >> ((GLYPH_X-1)-x)) & glyphs[y+GLYPH_Y*(ltr)]) {
*((unsigned int*)ptr) = isrgb ? (unsigned int)((c&0xFF)<<16 | (c&0xFF00) | (c&0xFF0000)>>16) : c;
} else {
*((unsigned int*)ptr) = 0x000000;
}
ptr += 4;
}
ptr += pitch - GLYPH_X*4;
}
}
void draw_byte(unsigned char lx, unsigned char ly, unsigned char letter)
{
draw_cbyte(lx, ly, letter, 0xFFFFFF);
}
void draw_cletter(unsigned char lx, unsigned char ly, unsigned char letter, unsigned int c)
{
unsigned int x, y;
unsigned char* ptr = lfb;
ptr += (pitch*ly*GLYPH_Y+lx*4*GLYPH_X);
unsigned char ltr = letter & 0x7F;
for(y=0; y<GLYPH_Y; y++) {
for(x=0; x<GLYPH_X; x++) {
if((0x80 >> ((GLYPH_X-1)-x)) & glyphs[y+GLYPH_Y*(ltr)]) {
*((unsigned int*)ptr) = isrgb ? (unsigned int)((c&0xFF)<<16 | (c&0xFF00) | (c&0xFF0000)>>16) : c;
} else {
*((unsigned int*)ptr) = 0x000000;
}
ptr += 4;
}
ptr += pitch - GLYPH_X*4;
}
}
void draw_letter(unsigned char lx, unsigned char ly, unsigned char letter)
{
draw_cletter(lx, ly, letter, 0xFFFFFF);
}
void draw_cstring(unsigned int lx, unsigned int ly, char* s, unsigned int c)
{
unsigned int x = lx % GG_MAX_X, y = ly % GG_MAX_Y;
unsigned int idx = 0;
while(s[idx] != 0) {
draw_cletter(x++, y, s[idx++], c);
if (x > GG_MAX_X) {
y += 1;
x = 0;
}
// CHECK Y EVENTUALLY
}
}
void draw_string(unsigned int lx, unsigned int ly, char* s)
{
draw_cstring(lx, ly, s, 0xFFFFFF);
}
void draw_chex32(unsigned int lx, unsigned int ly, unsigned long val, unsigned int c)
{
unsigned int x = lx % GG_MAX_X, y = ly % GG_MAX_Y;
for(unsigned int i = 0; i < GLYPH_X; i++) {
draw_cbyte(x++, y, 0xF & (val >> ((GLYPH_X-1)-i)*4), c);
if (x > GG_MAX_X) {
y += 1;
x = 0;
}
// CHECK Y EVENTUALLY
}
}
void draw_hex32(unsigned int lx, unsigned int ly, unsigned long val)
{
draw_chex32(lx, ly, val, 0xFFFFFF);
}
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