nuclear@3: #include <stdio.h>
nuclear@3: #include <SDL/SDL.h>
nuclear@3: #include "gfx.h"
nuclear@3: #include "image.h"
nuclear@3: 
nuclear@3: static SDL_Surface *fbsurf;
nuclear@3: static int scr_width, scr_height;
nuclear@3: static int fb_width, fb_height;
nuclear@3: static int num_bitplanes;
nuclear@7: static int init_flags;
nuclear@3: 
nuclear@3: 
nuclear@3: int gfx_init(int nbpl, unsigned int flags)
nuclear@3: {
nuclear@7: 	init_flags = flags;
nuclear@3: 	num_bitplanes = nbpl;
nuclear@3: 	scr_width = fb_width = (flags & GFX_HIRES) ? 640 : 320;
nuclear@3: 	scr_height = fb_height = (flags & GFX_ILACE) ? 512 : 256;
nuclear@3: 
nuclear@3: 	if(SDL_Init(SDL_INIT_VIDEO) == -1) {
nuclear@3: 		fprintf(stderr, "failed to initialize SDL\n");
nuclear@3: 		return -1;
nuclear@3: 	}
nuclear@3: 	if(!(fbsurf = SDL_SetVideoMode(scr_width, scr_height, 32, SDL_SWSURFACE))) {
nuclear@3: 		fprintf(stderr, "failed to set video mode %dx%d\n", scr_width, scr_height);
nuclear@3: 		SDL_Quit();
nuclear@3: 		return -1;
nuclear@3: 	}
nuclear@4: 	SDL_WM_SetCaption("imgv SDL version", 0);
nuclear@3: 
nuclear@3: 	return 0;
nuclear@3: }
nuclear@3: 
nuclear@3: void gfx_shutdown(void)
nuclear@3: {
nuclear@3: 	SDL_Quit();
nuclear@3: }
nuclear@3: 
nuclear@3: 
nuclear@3: int gfx_screen_width(void)
nuclear@3: {
nuclear@3: 	return scr_width;
nuclear@3: }
nuclear@3: 
nuclear@3: int gfx_screen_height(void)
nuclear@3: {
nuclear@3: 	return scr_height;
nuclear@3: }
nuclear@3: 
nuclear@3: 
nuclear@3: void *gfx_set_framebuffer(void *fb, int width, int height)
nuclear@3: {
nuclear@11: 	fb_width = width;
nuclear@11: 	fb_height = height;
nuclear@10: 	return 0;
nuclear@3: }
nuclear@3: 
nuclear@3: void *gfx_get_framebuffer(void)
nuclear@3: {
nuclear@3: 	return 0;
nuclear@3: }
nuclear@3: 
nuclear@3: 
nuclear@3: int get_framebuffer_width(void)
nuclear@3: {
nuclear@3: 	return fb_width;
nuclear@3: }
nuclear@3: 
nuclear@3: int get_framebuffer_height(void)
nuclear@3: {
nuclear@3: 	return fb_height;
nuclear@3: }
nuclear@3: 
nuclear@3: 
nuclear@3: void gfx_begin_copperlist(void)
nuclear@3: {
nuclear@3: }
nuclear@3: 
nuclear@3: 
nuclear@3: int gfx_next_event(union gfx_event *ev, int block)
nuclear@3: {
nuclear@3: 	SDL_Event sdlev;
nuclear@3: 
nuclear@3: 	if(block) {
nuclear@3: 		SDL_WaitEvent(&sdlev);
nuclear@3: 	} else {
nuclear@3: 		if(!SDL_PollEvent(&sdlev)) {
nuclear@3: 			return 0;
nuclear@3: 		}
nuclear@3: 	}
nuclear@3: 
nuclear@3: 	switch(sdlev.type) {
nuclear@3: 	case SDL_QUIT:
nuclear@3: 		ev->type = GFX_EV_QUIT;
nuclear@3: 		return 1;
nuclear@3: 
nuclear@3: 	case SDL_KEYDOWN:
nuclear@3: 	case SDL_KEYUP:
nuclear@3: 		ev->type = GFX_EV_KEY;
nuclear@3: 		ev->key.key = sdlev.key.keysym.sym;
nuclear@3: 		ev->key.pressed = sdlev.key.state == SDL_PRESSED;
nuclear@3: 		return 1;
nuclear@3: 
nuclear@3: 	default:
nuclear@3: 		break;
nuclear@3: 	}
nuclear@3: 	return 0;
nuclear@3: }
nuclear@3: 
nuclear@3: 
nuclear@3: void gfx_wait_vpos(int x)
nuclear@3: {
nuclear@3: }
nuclear@3: 
nuclear@3: void gfx_wait_vblank(void)
nuclear@3: {
nuclear@3: }
nuclear@3: 
nuclear@3: #define ARED(x)		((((x) & 0xf00) >> 4) | (((x) & 0xf00) >> 8))
nuclear@3: #define AGREEN(x)	(((x) & 0xf0) | (((x) & 0xf0) >> 4))
nuclear@3: #define ABLUE(x)	((((x) & 0xf) << 4) | ((x) & 0xf))
nuclear@3: 
nuclear@4: #define RSHIFT		(fbsurf->format->Rshift)
nuclear@4: #define GSHIFT		(fbsurf->format->Gshift)
nuclear@4: #define BSHIFT		(fbsurf->format->Bshift)
nuclear@4: #define RMASK		(fbsurf->format->Rmask)
nuclear@4: #define GMASK		(fbsurf->format->Gmask)
nuclear@4: #define BMASK		(fbsurf->format->Bmask)
nuclear@4: 
nuclear@6: #define PACKRGB(r, g, b)	((((r) << RSHIFT) & RMASK) | \
nuclear@6: 		(((g) << GSHIFT) & GMASK) | \
nuclear@6: 		(((b) << BSHIFT) & BMASK))
nuclear@6: 
nuclear@3: void gfx_show_image(struct ham_image *img)
nuclear@3: {
nuclear@11: 	int i, j, k, ncolors;
nuclear@11: 	uint32_t color, palette[256];
nuclear@3: 	uint32_t *dest;
nuclear@3: 	unsigned char *src;
nuclear@6: 	struct palchange *chg = img->chglist;
nuclear@3: 
nuclear@11: 	ncolors = 1 << img->nbitplanes;
nuclear@11: 
nuclear@11: 	for(i=0; i<ncolors; i++) {
nuclear@3: 		uint16_t pcol = img->palette[i];
nuclear@3: 		int red = ARED(pcol);
nuclear@3: 		int green = AGREEN(pcol);
nuclear@3: 		int blue = ABLUE(pcol);
nuclear@6: 		palette[i] = PACKRGB(red, green, blue);
nuclear@3: 	}
nuclear@3: 
nuclear@3: 	if(SDL_MUSTLOCK(fbsurf)) {
nuclear@3: 		SDL_LockSurface(fbsurf);
nuclear@3: 	}
nuclear@3: 
nuclear@3: 	dest = fbsurf->pixels;
nuclear@3: 	src = img->pixels;
nuclear@3: 	for(i=0; i<img->height; i++) {
nuclear@11: 		if(i >= scr_height) break;
nuclear@11: 
nuclear@6: 		while(chg && chg->line <= i) {
nuclear@6: 			int idx = (chg->entry & 0xf000) >> 12;
nuclear@6: 			int red = ARED(chg->entry);
nuclear@6: 			int green = AGREEN(chg->entry);
nuclear@6: 			int blue = ABLUE(chg->entry);
nuclear@6: 			palette[idx] = PACKRGB(red, green, blue);
nuclear@6: 			chg = chg->next;
nuclear@6: 		}
nuclear@6: 
nuclear@3: 		for(j=0; j<img->width; j++) {
nuclear@3: 			unsigned char idx = 0;
nuclear@7: 			unsigned char ham = 0;
nuclear@4: 			int bit = 7 - (j & 7);
nuclear@4: 
nuclear@3: 			for(k=0; k<img->nbitplanes; k++) {
nuclear@5: 				idx |= (((*(src + k * img->width / 8) >> bit) & 1) << k);
nuclear@3: 			}
nuclear@4: 
nuclear@7: 			if(init_flags & GFX_HAM) {
nuclear@7: 				ham = (idx >> 4) & 3;
nuclear@7: 			}
nuclear@4: 
nuclear@4: 			switch(ham) {
nuclear@4: 			case 0:
nuclear@4: 				color = palette[idx];
nuclear@4: 				break;
nuclear@4: 			case 1:
nuclear@6: 				color = (color & ~BMASK) | (((uint32_t)ABLUE(idx)) << BSHIFT);
nuclear@4: 				break;
nuclear@4: 			case 2:
nuclear@6: 				color = (color & ~RMASK) | (((uint32_t)ABLUE(idx)) << RSHIFT);
nuclear@4: 				break;
nuclear@4: 			case 3:
nuclear@6: 				color = (color & ~GMASK) | (((uint32_t)ABLUE(idx)) << GSHIFT);
nuclear@4: 			}
nuclear@4: 
nuclear@4: 			*dest++ = color;
nuclear@4: 			if(!bit) {
nuclear@3: 				++src;
nuclear@3: 			}
nuclear@3: 		}
nuclear@3: 		src += img->width / 8 * (img->nbitplanes - 1);
nuclear@3: 	}
nuclear@3: 
nuclear@3: 	if(SDL_MUSTLOCK(fbsurf)) {
nuclear@3: 		SDL_UnlockSurface(fbsurf);
nuclear@3: 	}
nuclear@3: 
nuclear@3: 	SDL_Flip(fbsurf);
nuclear@3: }