git.sesse.net Git - pistorm/blob - platforms/amiga/rtg/rtg.c

   1 // SPDX-License-Identifier: MIT
   2
   3 #include <stdint.h>
   4 #include <endian.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <time.h>
   9 #include "rtg.h"
  10 #include "config_file/config_file.h"
  11
  12 uint8_t rtg_u8[4];
  13 uint16_t rtg_x[8], rtg_y[8];
  14 uint16_t rtg_user[8];
  15 uint16_t rtg_format;
  16 uint32_t rtg_address[8];
  17 uint32_t rtg_address_adj[8];
  18 uint32_t rtg_rgb[8];
  19
  20 static uint8_t display_enabled = 0xFF;
  21
  22 uint16_t rtg_display_width, rtg_display_height;
  23 uint16_t rtg_display_format;
  24 uint16_t rtg_pitch, rtg_total_rows;
  25 uint16_t rtg_offset_x, rtg_offset_y;
  26
  27 uint8_t *rtg_mem; // FIXME
  28
  29 uint32_t framebuffer_addr = 0;
  30 uint32_t framebuffer_addr_adj = 0;
  31
  32 static void handle_rtg_command(uint32_t cmd);
  33 //static struct timespec f1, f2;
  34
  35 uint8_t realtime_graphics_debug = 0;
  36 extern int cpu_emulation_running;
  37 extern uint8_t rtg_on;
  38
  39 /*
  40 static const char *op_type_names[OP_TYPE_NUM] = {
  41     "BYTE",
  42     "WORD",
  43     "LONGWORD",
  44     "MEM",
  45 };
  46
  47 static const char *rtg_format_names[RTGFMT_NUM] = {
  48     "8BPP CLUT",
  49     "16BPP RGB (565)",
  50     "32BPP RGB (RGBA)",
  51     "15BPP RGB (555)",
  52 };
  53 */
  54 int init_rtg_data() {
  55     rtg_mem = calloc(1, 40 * SIZE_MEGA);
  56     if (!rtg_mem) {
  57         printf("Failed to allocate RTG video memory.\n");
  58         return 0;
  59     }
  60
  61     return 1;
  62 }
  63
  64 void shutdown_rtg() {
  65     printf("[RTG] Shutting down RTG.\n");
  66     if (rtg_on) {
  67         rtg_on = 0;
  68     }
  69     if (rtg_mem) {
  70         free(rtg_mem);
  71         rtg_mem = NULL;
  72     }
  73 }
  74
  75 //void rtg_update_screen();
  76
  77 unsigned int rtg_read(uint32_t address, uint8_t mode) {
  78     //printf("%s read from RTG: %.8X\n", op_type_names[mode], address);
  79     if (address == RTG_COMMAND) {
  80         return 0xFFCF;
  81     }
  82     if (address >= PIGFX_REG_SIZE) {
  83         if (rtg_mem && (address - PIGFX_REG_SIZE) < PIGFX_UPPER) {
  84             switch (mode) {
  85                 case OP_TYPE_BYTE:
  86                     return (rtg_mem[address - PIGFX_REG_SIZE]);
  87                     break;
  88                 case OP_TYPE_WORD:
  89                     return be16toh(*(( uint16_t *) (&rtg_mem[address - PIGFX_REG_SIZE])));
  90                     break;
  91                 case OP_TYPE_LONGWORD:
  92                     return be32toh(*(( uint32_t *) (&rtg_mem[address - PIGFX_REG_SIZE])));
  93                     break;
  94                 default:
  95                     return 0;
  96             }
  97         }
  98     }
  99
 100     return 0;
 101 }
 102
 103 struct timespec diff(struct timespec start, struct timespec end)
 104 {
 105     struct timespec temp;
 106     if ((end.tv_nsec-start.tv_nsec)<0) {
 107         temp.tv_sec = end.tv_sec-start.tv_sec-1;
 108         temp.tv_nsec = 1000000000+end.tv_nsec-start.tv_nsec;
 109     } else {
 110         temp.tv_sec = end.tv_sec-start.tv_sec;
 111         temp.tv_nsec = end.tv_nsec-start.tv_nsec;
 112     }
 113     return temp;
 114 }
 115
 116 #define CHKREG(a, b) case a: b = value; break;
 117
 118 void rtg_write(uint32_t address, uint32_t value, uint8_t mode) {
 119     //printf("%s write to RTG: %.8X (%.8X)\n", op_type_names[mode], address, value);
 120     if (address >= PIGFX_REG_SIZE) {
 121         /*if ((address - PIGFX_REG_SIZE) < framebuffer_addr) {// || (address - PIGFX_REG_SIZE) > framebuffer_addr + ((rtg_display_width << rtg_display_format) * rtg_display_height)) {
 122             printf("Write to RTG memory outside frame buffer %.8X (%.8X).\n", (address - PIGFX_REG_SIZE), framebuffer_addr);
 123         }*/
 124         if (rtg_mem && (address - PIGFX_REG_SIZE) < PIGFX_UPPER) {
 125             switch (mode) {
 126                 case OP_TYPE_BYTE:
 127                     rtg_mem[address - PIGFX_REG_SIZE] = value;
 128                     break;
 129                 case OP_TYPE_WORD:
 130                     *(( uint16_t *) (&rtg_mem[address - PIGFX_REG_SIZE])) = htobe16(value);
 131                     break;
 132                 case OP_TYPE_LONGWORD:
 133                     *(( uint32_t *) (&rtg_mem[address - PIGFX_REG_SIZE])) = htobe32(value);
 134                     break;
 135                 default:
 136                     return;
 137             }
 138         }
 139     }
 140     else {
 141         switch (mode) {
 142             case OP_TYPE_BYTE:
 143                 switch (address) {
 144                     CHKREG(RTG_U81, rtg_u8[0]);
 145                     CHKREG(RTG_U82, rtg_u8[1]);
 146                     CHKREG(RTG_U83, rtg_u8[2]);
 147                     CHKREG(RTG_U84, rtg_u8[3]);
 148                 }
 149                 break;
 150             case OP_TYPE_WORD:
 151                 switch (address) {
 152                     CHKREG(RTG_X1, rtg_x[0]);
 153                     CHKREG(RTG_X2, rtg_x[1]);
 154                     CHKREG(RTG_X3, rtg_x[2]);
 155                     CHKREG(RTG_X4, rtg_x[3]);
 156                     CHKREG(RTG_X5, rtg_x[4]);
 157                     CHKREG(RTG_Y1, rtg_y[0]);
 158                     CHKREG(RTG_Y2, rtg_y[1]);
 159                     CHKREG(RTG_Y3, rtg_y[2]);
 160                     CHKREG(RTG_Y4, rtg_y[3]);
 161                     CHKREG(RTG_Y5, rtg_y[4]);
 162                     CHKREG(RTG_U1, rtg_user[0]);
 163                     CHKREG(RTG_U2, rtg_user[1]);
 164                     CHKREG(RTG_FORMAT, rtg_format);
 165                     case RTG_COMMAND:
 166                         handle_rtg_command(value);
 167                         break;
 168                 }
 169                 break;
 170             case OP_TYPE_LONGWORD:
 171                 switch (address) {
 172                     case RTG_ADDR1:
 173                         rtg_address[0] = value;
 174                         rtg_address_adj[0] = value - (PIGFX_RTG_BASE + PIGFX_REG_SIZE);
 175                         break;
 176                     case RTG_ADDR2:
 177                         rtg_address[1] = value;
 178                         rtg_address_adj[1] = value - (PIGFX_RTG_BASE + PIGFX_REG_SIZE);
 179                         break;
 180                     CHKREG(RTG_ADDR3, rtg_address[2]);
 181                     CHKREG(RTG_ADDR4, rtg_address[3]);
 182                     CHKREG(RTG_RGB1, rtg_rgb[0]);
 183                     CHKREG(RTG_RGB2, rtg_rgb[1]);
 184                 }
 185                 break;
 186         }
 187     }
 188
 189     return;
 190 }
 191
 192 #define gdebug(a) if (realtime_graphics_debug) { printf(a); m68k_end_timeslice(); cpu_emulation_running = 0; }
 193
 194 static void handle_rtg_command(uint32_t cmd) {
 195     //printf("Handling RTG command %d (%.8X)\n", cmd, cmd);
 196     switch (cmd) {
 197         case RTGCMD_SETGC:
 198             rtg_display_format = rtg_format;
 199             rtg_display_width = rtg_x[0];
 200             rtg_display_height = rtg_y[0];
 201             if (rtg_u8[0]) {
 202                 //rtg_pitch = rtg_display_width << rtg_format;
 203                 framebuffer_addr_adj = framebuffer_addr + (rtg_offset_x << rtg_display_format) + (rtg_offset_y * rtg_pitch);
 204                 rtg_total_rows = rtg_y[1];
 205             }
 206             else {
 207                 //rtg_pitch = rtg_display_width << rtg_format;
 208                 framebuffer_addr_adj = framebuffer_addr + (rtg_offset_x << rtg_display_format) + (rtg_offset_y * rtg_pitch);
 209                 rtg_total_rows = rtg_y[1];
 210             }
 211             //printf("Set RTG mode:\n");
 212             //printf("%dx%d pixels\n", rtg_display_width, rtg_display_height);
 213             //printf("Pixel format: %s\n", rtg_format_names[rtg_display_format]);
 214             break;
 215         case RTGCMD_SETPAN:
 216             //printf("Command: SetPan.\n");
 217             rtg_offset_x = rtg_x[1];
 218             rtg_offset_y = rtg_y[1];
 219             rtg_pitch = (rtg_x[0] << rtg_display_format);
 220             framebuffer_addr = rtg_address[0] - (PIGFX_RTG_BASE + PIGFX_REG_SIZE);
 221             framebuffer_addr_adj = framebuffer_addr + (rtg_offset_x << rtg_display_format) + (rtg_offset_y * rtg_pitch);
 222             //printf("Set panning to $%.8X (%.8X)\n", framebuffer_addr, rtg_address[0]);
 223             //printf("(Panned: $%.8X)\n", framebuffer_addr_adj);
 224             //printf("Offset X/Y: %d/%d\n", rtg_offset_x, rtg_offset_y);
 225             printf("Pitch: %d (%d bytes)\n", rtg_x[0], rtg_pitch);
 226             break;
 227         case RTGCMD_SETCLUT: {
 228             //printf("Command: SetCLUT.\n");
 229             //printf("Set palette entry %d to %d, %d, %d\n", rtg_u8[0], rtg_u8[1], rtg_u8[2], rtg_u8[3]);
 230             //printf("Set palette entry %d to 32-bit palette color: %.8X\n", rtg_u8[0], rtg_rgb[0]);
 231             rtg_set_clut_entry(rtg_u8[0], rtg_rgb[0]);
 232             break;
 233         }
 234         case RTGCMD_SETDISPLAY:
 235             //printf("RTG SetDisplay %s\n", (rtg_u8[1]) ? "enabled" : "disabled");
 236             // I remeber wrongs.
 237             //printf("Command: SetDisplay.\n");
 238             break;
 239         case RTGCMD_ENABLE:
 240         case RTGCMD_SETSWITCH:
 241             //printf("RTG SetSwitch %s\n", ((rtg_x[0]) & 0x01) ? "enabled" : "disabled");
 242             //printf("LAL: %.4X\n", rtg_x[0]);
 243             if (display_enabled != ((rtg_x[0]) & 0x01)) {
 244                 display_enabled = ((rtg_x[0]) & 0x01);
 245                 if (display_enabled) {
 246                     rtg_init_display();
 247                 }
 248                 else
 249                     rtg_shutdown_display();
 250             }
 251             break;
 252         case RTGCMD_FILLRECT:
 253             if (rtg_u8[0] == 0xFF || rtg_format != RTGFMT_8BIT) {
 254                 rtg_fillrect_solid(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_rgb[0], rtg_x[2], rtg_format);
 255                 gdebug("FillRect Solid\n");
 256             }
 257             else {
 258                 rtg_fillrect(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_rgb[0], rtg_x[2], rtg_format, rtg_u8[0]);
 259                 gdebug("FillRect Masked\n");
 260             }
 261             break;
 262         case RTGCMD_INVERTRECT:
 263             rtg_invertrect(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_x[2], rtg_format, rtg_u8[0]);
 264             gdebug("InvertRect\n");
 265             break;
 266         case RTGCMD_BLITRECT:
 267             if (rtg_u8[0] == 0xFF || rtg_format != RTGFMT_8BIT) {
 268                 rtg_blitrect_solid(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_x[2], rtg_y[2], rtg_x[3], rtg_format);
 269                 gdebug("BlitRect Solid\n");
 270             }
 271             else {
 272                 rtg_blitrect(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_x[2], rtg_y[2], rtg_x[3], rtg_format, rtg_u8[0]);
 273                 gdebug("BlitRect Masked\n");
 274             }
 275             break;
 276         case RTGCMD_BLITRECT_NOMASK_COMPLETE:
 277             rtg_blitrect_nomask_complete(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_x[2], rtg_y[2], rtg_x[3], rtg_x[4], rtg_address[0], rtg_address[1], rtg_format, rtg_u8[0]);
 278             gdebug("BlitRectNoMaskComplete\n");
 279             break;
 280         case RTGCMD_BLITPATTERN:
 281             rtg_blitpattern(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_address[0], rtg_rgb[0], rtg_rgb[1], rtg_x[3], rtg_format, rtg_x[2], rtg_y[2], rtg_u8[0], rtg_u8[1], rtg_u8[2]);
 282             gdebug("BlitPattern\n");
 283             return;
 284         case RTGCMD_BLITTEMPLATE:
 285             rtg_blittemplate(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_address[0], rtg_rgb[0], rtg_rgb[1], rtg_x[3], rtg_x[4], rtg_format, rtg_x[2], rtg_u8[0], rtg_u8[1]);
 286             gdebug("BlitTemplate\n");
 287             break;
 288         case RTGCMD_DRAWLINE:
 289             if (rtg_u8[0] == 0xFF && rtg_y[2] == 0xFFFF)
 290                 rtg_drawline_solid(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_x[2], rtg_rgb[0], rtg_x[3], rtg_format);
 291             else
 292                 rtg_drawline(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_x[2], rtg_y[2], rtg_x[4], rtg_rgb[0], rtg_rgb[1],  rtg_x[3], rtg_format, rtg_u8[0], rtg_u8[1]);
 293             gdebug("DrawLine\n");
 294             break;
 295         case RTGCMD_P2C:
 296             rtg_p2c(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_x[2], rtg_y[2], rtg_u8[1], rtg_u8[2], rtg_u8[0], (rtg_user[0] >> 0x8), rtg_x[4], (uint8_t *)&rtg_mem[rtg_address_adj[1]]);
 297             //rtg_p2c_broken(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_x[2], rtg_y[2], rtg_x[3], rtg_u8[0], rtg_u8[1], rtg_u8[2], rtg_user[0]);
 298             gdebug("Planar2Chunky\n");
 299             break;
 300         case RTGCMD_P2D:
 301             break;
 302     }
 303 }