nuclear@0: #include <stdio.h>
nuclear@0: #include <proto/exec.h>
nuclear@0: #include "gfx.h"
nuclear@0: #include "copper.h"
nuclear@0: #include "hwregs.h"
nuclear@0: #include "logger.h"
nuclear@0: 
nuclear@0: static int scr_width, scr_height;
nuclear@0: static int fb_width, fb_height;
nuclear@0: static int num_bitplanes;
nuclear@0: static uint16_t prev_intena, prev_intreq, prev_adkcon, prev_dmacon;
nuclear@0: 
nuclear@0: static unsigned char *framebuf;
nuclear@0: static unsigned long fbsize;
nuclear@0: static int own_framebuf;
nuclear@0: 
nuclear@0: int gfx_init(int nbpl, unsigned int flags)
nuclear@0: {
nuclear@0: 	uint16_t bplcon0;
nuclear@0: 
nuclear@0: 	num_bitplanes = nbpl;
nuclear@0: 	scr_width = fb_width = (flags & GFX_HIRES) ? 640 : 320;
nuclear@0: 	scr_height = fb_height = (flags & GFX_ILACE) ? 512 : 256;
nuclear@0: 
nuclear@0: 	Forbid();
nuclear@0: 
nuclear@0: 	prev_dmacon = REG_DMACONR;
nuclear@0: 	REG_DMACON = CLRBITS(DMA_ALL);
nuclear@0: 
nuclear@0: 	prev_intena = REG_INTENAR;
nuclear@0: 	prev_intreq = REG_INTREQR;
nuclear@0: 	prev_adkcon = REG_ADKCONR;
nuclear@0: 
nuclear@0: 	if(init_copper(0, 0) == -1) {
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	if(!gfx_set_framebuffer(0, scr_width, scr_height)) {
nuclear@0: 		gfx_shutdown();
nuclear@0: 		return -1;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	bplcon0 = BPLCON0_COUNT(nbpl) | BPLCON0_COLOR;
nuclear@0: 	if(flags & GFX_HIRES) bplcon0 |= BPLCON0_HIRES;
nuclear@0: 	if(flags & GFX_ILACE) bplcon0 |= BPLCON0_LACE;
nuclear@0: 	if(flags & GFX_HAM) bplcon0 |= BPLCON0_HOMOD;
nuclear@0: 	if(flags & GFX_DBLPF) bplcon0 |= BPLCON0_DBLPF;
nuclear@0: 
nuclear@0: 	REG_BPLCON0 = bplcon0;
nuclear@0: 	REG_BPLCON1 = 0;	/* h-scroll */
nuclear@0: 	REG_DIWSTART = 0x2c81;	/* 81h horiz start, 2ch vertical start */
nuclear@0: 	REG_DIWSTOP = 0x2cc1;
nuclear@0: 	REG_DDFSTART = (flags & GFX_HIRES) ? 0x3c : 0x38;
nuclear@0: 	REG_DDFSTOP = (flags & GFX_HIRES) ? 0xd4 : 0xd0;
nuclear@0: 
nuclear@0: 	gfx_wait_vblank();
nuclear@0: 	gfx_begin_copperlist();
nuclear@0: 	add_copper(COPPER_END);
nuclear@0: 
nuclear@0: 	REG_DMACON = SETBITS(DMA_BPL | DMA_COPPER | DMA_MASTER);
nuclear@0: 	return 0;
nuclear@0: }
nuclear@0: 
nuclear@0: void gfx_shutdown(void)
nuclear@0: {
nuclear@0: 	REG_DMACON = CLRBITS(DMA_ALL);
nuclear@0: 	REG_DMACON = SETBITS(prev_dmacon);
nuclear@0: 
nuclear@0: 	REG_INTREQ = CLRBITS(0x7fff);
nuclear@0: 	REG_INTREQ = SETBITS(prev_intreq);
nuclear@0: 
nuclear@0: 	REG_ADKCON = CLRBITS(0x7fff);
nuclear@0: 	REG_ADKCON = SETBITS(prev_adkcon);
nuclear@0: 
nuclear@0: 	REG_INTENA = CLRBITS(INTEN_ALL);
nuclear@0: 	REG_INTENA = SETBITS(prev_intena);
nuclear@0: 
nuclear@0: 	if(framebuf && own_framebuf) {
nuclear@0: 		FreeMem(framebuf, fbsize);
nuclear@0: 	}
nuclear@0: 	framebuf = 0;
nuclear@0: 
nuclear@0: 	cleanup_copper();
nuclear@0: 	Permit();
nuclear@0: }
nuclear@0: 
nuclear@0: int gfx_screen_width(void)
nuclear@0: {
nuclear@0: 	return scr_width;
nuclear@0: }
nuclear@0: 
nuclear@0: int gfx_screen_height(void)
nuclear@0: {
nuclear@0: 	return scr_height;
nuclear@0: }
nuclear@0: 
nuclear@0: void *gfx_set_framebuffer(void *fb, int width, int height)
nuclear@0: {
nuclear@0: 	/*unsigned int bpl_scanline_sz = width / 8;*/
nuclear@0: 	unsigned long sz = width * height / 8 * num_bitplanes;
nuclear@0: 	uint32_t bpladdr;
nuclear@0: 	uint16_t bplmod;
nuclear@0: 
nuclear@0: 	if(framebuf && own_framebuf) {
nuclear@0: 		FreeMem(framebuf, fbsize);
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	if(fb) {
nuclear@0: 		framebuf = fb;
nuclear@0: 		own_framebuf = 0;
nuclear@0: 	} else {
nuclear@0: 		if(!(framebuf = AllocMem(sz, MEMF_CHIP))) {
nuclear@0: 			logmsg("gfx_set_framebuffer failed to allocate %lu bytes of chip mem for framebuffer\n", sz);
nuclear@0: 			return 0;
nuclear@0: 		}
nuclear@0: 		own_framebuf = 1;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	fb_width = width;
nuclear@0: 	fb_height = height;
nuclear@0: 	fbsize = sz;
nuclear@0: 
nuclear@0: 	bpladdr = (uint32_t)framebuf;
nuclear@0: 	logmsg("bitplane address: %lx\n", (unsigned long)bpladdr);
nuclear@0: 
nuclear@0: 	bplmod = (fb_width - scr_width) / 8 + fb_width / 8 * num_bitplanes;
nuclear@0: 	REG_BPL1MOD = bplmod;
nuclear@0: 	REG_BPL2MOD = bplmod;
nuclear@0: 
nuclear@0: 	/*
nuclear@0: 	REG32_BPL1PT = bpladdr; bpladdr += bpl_scanline_sz;
nuclear@0: 	REG32_BPL2PT = bpladdr; bpladdr += bpl_scanline_sz;
nuclear@0: 	REG32_BPL3PT = bpladdr; bpladdr += bpl_scanline_sz;
nuclear@0: 	REG32_BPL4PT = bpladdr; bpladdr += bpl_scanline_sz;
nuclear@0: 	REG32_BPL5PT = bpladdr; bpladdr += bpl_scanline_sz;
nuclear@0: 	REG32_BPL6PT = bpladdr;
nuclear@0: 	*/
nuclear@0: 	return framebuf;
nuclear@0: }
nuclear@0: 
nuclear@0: void *gfx_get_framebuffer(void)
nuclear@0: {
nuclear@0: 	return framebuf;
nuclear@0: }
nuclear@0: 
nuclear@0: int gfx_framebuffer_width(void)
nuclear@0: {
nuclear@0: 	return fb_width;
nuclear@0: }
nuclear@0: 
nuclear@0: int gfx_framebuffer_height(void)
nuclear@0: {
nuclear@0: 	return fb_height;
nuclear@0: }
nuclear@0: 
nuclear@0: void gfx_begin_copperlist(void)
nuclear@0: {
nuclear@0: 	static const uint16_t bplptr[] = {
nuclear@0: 		REGN_BPL1PTH, REGN_BPL2PTH, REGN_BPL3PTH, REGN_BPL4PTH, REGN_BPL5PTH, REGN_BPL6PTH
nuclear@0: 	};
nuclear@0: 	int i;
nuclear@0: 	uint32_t bpladdr;
nuclear@0: 	bpladdr = (uint32_t)framebuf;
nuclear@0: 
nuclear@0: 	for(i=0; i<num_bitplanes; i++) {
nuclear@0: 		add_copper(COPPER_MOVE(bplptr[i], bpladdr >> 16));
nuclear@0: 		add_copper(COPPER_MOVE(bplptr[i] + 2, bpladdr));
nuclear@0: 		bpladdr += fb_width / 8 * num_bitplanes;
nuclear@0: 	}
nuclear@0: }
nuclear@0: 
nuclear@0: static int mouse_bnstate(void)
nuclear@0: {
nuclear@0: 	return (REG_CIAA_PORTA & CIAA_PA_FIR0) ? 0 : 1;
nuclear@0: }
nuclear@0: 
nuclear@0: int gfx_next_event(union gfx_event *ev, int block)
nuclear@0: {
nuclear@0: 	/* TODO */
nuclear@0: 	if(block) {
nuclear@0: 		while(!mouse_bnstate());
nuclear@0: 		ev->type = GFX_EV_QUIT;
nuclear@0: 		return 1;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	if(mouse_bnstate()) {
nuclear@0: 		ev->type = GFX_EV_QUIT;
nuclear@0: 		return 1;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	return 0;
nuclear@0: }
nuclear@0: 
nuclear@0: void gfx_wait_vpos(int x)
nuclear@0: {
nuclear@0: 	x <<= 8;
nuclear@0: 	while((REG32_VPOSR & 0x1ff00) < x);
nuclear@0: }
nuclear@0: 
nuclear@0: void gfx_wait_vblank(void)
nuclear@0: {
nuclear@0: 	gfx_wait_vpos(300);
nuclear@0: }