amiga_imgv

annotate src/sdl/gfx.c @ 10:5614fbb9c1de

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Backed out changeset 01bd8bbc46d4
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 29 Oct 2017 22:53:41 +0200
parents 01bd8bbc46d4
children 3d9aaefb8ba6
rev   line source
nuclear@3 1 #include <stdio.h>
nuclear@3 2 #include <SDL/SDL.h>
nuclear@3 3 #include "gfx.h"
nuclear@3 4 #include "image.h"
nuclear@3 5
nuclear@3 6 static SDL_Surface *fbsurf;
nuclear@3 7 static int scr_width, scr_height;
nuclear@3 8 static int fb_width, fb_height;
nuclear@3 9 static int num_bitplanes;
nuclear@7 10 static int init_flags;
nuclear@3 11
nuclear@3 12
nuclear@3 13 int gfx_init(int nbpl, unsigned int flags)
nuclear@3 14 {
nuclear@7 15 init_flags = flags;
nuclear@3 16 num_bitplanes = nbpl;
nuclear@3 17 scr_width = fb_width = (flags & GFX_HIRES) ? 640 : 320;
nuclear@3 18 scr_height = fb_height = (flags & GFX_ILACE) ? 512 : 256;
nuclear@3 19
nuclear@3 20 if(SDL_Init(SDL_INIT_VIDEO) == -1) {
nuclear@3 21 fprintf(stderr, "failed to initialize SDL\n");
nuclear@3 22 return -1;
nuclear@3 23 }
nuclear@3 24 if(!(fbsurf = SDL_SetVideoMode(scr_width, scr_height, 32, SDL_SWSURFACE))) {
nuclear@3 25 fprintf(stderr, "failed to set video mode %dx%d\n", scr_width, scr_height);
nuclear@3 26 SDL_Quit();
nuclear@3 27 return -1;
nuclear@3 28 }
nuclear@4 29 SDL_WM_SetCaption("imgv SDL version", 0);
nuclear@3 30
nuclear@3 31 return 0;
nuclear@3 32 }
nuclear@3 33
nuclear@3 34 void gfx_shutdown(void)
nuclear@3 35 {
nuclear@3 36 SDL_Quit();
nuclear@3 37 }
nuclear@3 38
nuclear@3 39
nuclear@3 40 int gfx_screen_width(void)
nuclear@3 41 {
nuclear@3 42 return scr_width;
nuclear@3 43 }
nuclear@3 44
nuclear@3 45 int gfx_screen_height(void)
nuclear@3 46 {
nuclear@3 47 return scr_height;
nuclear@3 48 }
nuclear@3 49
nuclear@3 50
nuclear@3 51 void *gfx_set_framebuffer(void *fb, int width, int height)
nuclear@3 52 {
nuclear@10 53 return 0;
nuclear@3 54 }
nuclear@3 55
nuclear@3 56 void *gfx_get_framebuffer(void)
nuclear@3 57 {
nuclear@3 58 return 0;
nuclear@3 59 }
nuclear@3 60
nuclear@3 61
nuclear@3 62 int get_framebuffer_width(void)
nuclear@3 63 {
nuclear@3 64 return fb_width;
nuclear@3 65 }
nuclear@3 66
nuclear@3 67 int get_framebuffer_height(void)
nuclear@3 68 {
nuclear@3 69 return fb_height;
nuclear@3 70 }
nuclear@3 71
nuclear@3 72
nuclear@3 73 void gfx_begin_copperlist(void)
nuclear@3 74 {
nuclear@3 75 }
nuclear@3 76
nuclear@3 77
nuclear@3 78 int gfx_next_event(union gfx_event *ev, int block)
nuclear@3 79 {
nuclear@3 80 SDL_Event sdlev;
nuclear@3 81
nuclear@3 82 if(block) {
nuclear@3 83 SDL_WaitEvent(&sdlev);
nuclear@3 84 } else {
nuclear@3 85 if(!SDL_PollEvent(&sdlev)) {
nuclear@3 86 return 0;
nuclear@3 87 }
nuclear@3 88 }
nuclear@3 89
nuclear@3 90 switch(sdlev.type) {
nuclear@3 91 case SDL_QUIT:
nuclear@3 92 ev->type = GFX_EV_QUIT;
nuclear@3 93 return 1;
nuclear@3 94
nuclear@3 95 case SDL_KEYDOWN:
nuclear@3 96 case SDL_KEYUP:
nuclear@3 97 ev->type = GFX_EV_KEY;
nuclear@3 98 ev->key.key = sdlev.key.keysym.sym;
nuclear@3 99 ev->key.pressed = sdlev.key.state == SDL_PRESSED;
nuclear@3 100 return 1;
nuclear@3 101
nuclear@3 102 default:
nuclear@3 103 break;
nuclear@3 104 }
nuclear@3 105 return 0;
nuclear@3 106 }
nuclear@3 107
nuclear@3 108
nuclear@3 109 void gfx_wait_vpos(int x)
nuclear@3 110 {
nuclear@3 111 }
nuclear@3 112
nuclear@3 113 void gfx_wait_vblank(void)
nuclear@3 114 {
nuclear@3 115 }
nuclear@3 116
nuclear@3 117 #define ARED(x) ((((x) & 0xf00) >> 4) | (((x) & 0xf00) >> 8))
nuclear@3 118 #define AGREEN(x) (((x) & 0xf0) | (((x) & 0xf0) >> 4))
nuclear@3 119 #define ABLUE(x) ((((x) & 0xf) << 4) | ((x) & 0xf))
nuclear@3 120
nuclear@4 121 #define RSHIFT (fbsurf->format->Rshift)
nuclear@4 122 #define GSHIFT (fbsurf->format->Gshift)
nuclear@4 123 #define BSHIFT (fbsurf->format->Bshift)
nuclear@4 124 #define RMASK (fbsurf->format->Rmask)
nuclear@4 125 #define GMASK (fbsurf->format->Gmask)
nuclear@4 126 #define BMASK (fbsurf->format->Bmask)
nuclear@4 127
nuclear@6 128 #define PACKRGB(r, g, b) ((((r) << RSHIFT) & RMASK) | \
nuclear@6 129 (((g) << GSHIFT) & GMASK) | \
nuclear@6 130 (((b) << BSHIFT) & BMASK))
nuclear@6 131
nuclear@3 132 void gfx_show_image(struct ham_image *img)
nuclear@3 133 {
nuclear@3 134 int i, j, k;
nuclear@6 135 uint32_t color, palette[16];
nuclear@3 136 uint32_t *dest;
nuclear@3 137 unsigned char *src;
nuclear@6 138 struct palchange *chg = img->chglist;
nuclear@3 139
nuclear@3 140 for(i=0; i<16; i++) {
nuclear@3 141 uint16_t pcol = img->palette[i];
nuclear@3 142 int red = ARED(pcol);
nuclear@3 143 int green = AGREEN(pcol);
nuclear@3 144 int blue = ABLUE(pcol);
nuclear@6 145 palette[i] = PACKRGB(red, green, blue);
nuclear@3 146 }
nuclear@3 147
nuclear@3 148 if(SDL_MUSTLOCK(fbsurf)) {
nuclear@3 149 SDL_LockSurface(fbsurf);
nuclear@3 150 }
nuclear@3 151
nuclear@3 152 dest = fbsurf->pixels;
nuclear@3 153 src = img->pixels;
nuclear@3 154 for(i=0; i<img->height; i++) {
nuclear@6 155 while(chg && chg->line <= i) {
nuclear@6 156 int idx = (chg->entry & 0xf000) >> 12;
nuclear@6 157 int red = ARED(chg->entry);
nuclear@6 158 int green = AGREEN(chg->entry);
nuclear@6 159 int blue = ABLUE(chg->entry);
nuclear@6 160 palette[idx] = PACKRGB(red, green, blue);
nuclear@6 161 chg = chg->next;
nuclear@6 162 }
nuclear@6 163
nuclear@3 164 for(j=0; j<img->width; j++) {
nuclear@3 165 unsigned char idx = 0;
nuclear@7 166 unsigned char ham = 0;
nuclear@4 167 int bit = 7 - (j & 7);
nuclear@4 168
nuclear@3 169 for(k=0; k<img->nbitplanes; k++) {
nuclear@5 170 idx |= (((*(src + k * img->width / 8) >> bit) & 1) << k);
nuclear@3 171 }
nuclear@4 172
nuclear@7 173 if(init_flags & GFX_HAM) {
nuclear@7 174 ham = (idx >> 4) & 3;
nuclear@7 175 }
nuclear@4 176
nuclear@4 177 switch(ham) {
nuclear@4 178 case 0:
nuclear@4 179 color = palette[idx];
nuclear@4 180 break;
nuclear@4 181 case 1:
nuclear@6 182 color = (color & ~BMASK) | (((uint32_t)ABLUE(idx)) << BSHIFT);
nuclear@4 183 break;
nuclear@4 184 case 2:
nuclear@6 185 color = (color & ~RMASK) | (((uint32_t)ABLUE(idx)) << RSHIFT);
nuclear@4 186 break;
nuclear@4 187 case 3:
nuclear@6 188 color = (color & ~GMASK) | (((uint32_t)ABLUE(idx)) << GSHIFT);
nuclear@4 189 }
nuclear@4 190
nuclear@4 191 *dest++ = color;
nuclear@4 192 if(!bit) {
nuclear@3 193 ++src;
nuclear@3 194 }
nuclear@3 195 }
nuclear@3 196 src += img->width / 8 * (img->nbitplanes - 1);
nuclear@3 197 }
nuclear@3 198
nuclear@3 199 if(SDL_MUSTLOCK(fbsurf)) {
nuclear@3 200 SDL_UnlockSurface(fbsurf);
nuclear@3 201 }
nuclear@3 202
nuclear@3 203 SDL_Flip(fbsurf);
nuclear@3 204 }