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 struct emulator_config *cfg;
  38 extern uint8_t rtg_on;
  39
  40 /*
  41 static const char *op_type_names[OP_TYPE_NUM] = {
  42     "BYTE",
  43     "WORD",
  44     "LONGWORD",
  45     "MEM",
  46 };
  47
  48 static const char *rtg_format_names[RTGFMT_NUM] = {
  49     "8BPP CLUT",
  50     "16BPP RGB (565)",
  51     "32BPP RGB (RGBA)",
  52     "15BPP RGB (555)",
  53 };
  54 */
  55 int init_rtg_data() {
  56     rtg_mem = calloc(1, 40 * SIZE_MEGA);
  57     if (!rtg_mem) {
  58         printf("Failed to allocate RTG video memory.\n");
  59         return 0;
  60     }
  61
  62     m68k_add_ram_range(PIGFX_RTG_BASE + PIGFX_REG_SIZE, PIGFX_RTG_SIZE - PIGFX_REG_SIZE, rtg_mem);
  63     add_mapping(cfg, MAPTYPE_RAM_NOALLOC, PIGFX_RTG_BASE + PIGFX_REG_SIZE, PIGFX_RTG_SIZE - PIGFX_REG_SIZE, -1, NULL, "rtg_mem");
  64     return 1;
  65 }
  66
  67 void shutdown_rtg() {
  68     printf("[RTG] Shutting down RTG.\n");
  69     if (rtg_on) {
  70         rtg_on = 0;
  71     }
  72     if (rtg_mem) {
  73
  74         free(rtg_mem);
  75         rtg_mem = NULL;
  76     }
  77 }
  78
  79 //void rtg_update_screen();
  80
  81 unsigned int rtg_get_fb() {
  82     return PIGFX_RTG_BASE + PIGFX_REG_SIZE + framebuffer_addr_adj;
  83 }
  84
  85 unsigned int rtg_read(uint32_t address, uint8_t mode) {
  86     //printf("%s read from RTG: %.8X\n", op_type_names[mode], address);
  87     if (address == RTG_COMMAND) {
  88         return 0xFFCF;
  89     }
  90     if (address >= PIGFX_REG_SIZE) {
  91         if (rtg_mem && (address - PIGFX_REG_SIZE) < PIGFX_UPPER) {
  92             switch (mode) {
  93                 case OP_TYPE_BYTE:
  94                     return (rtg_mem[address - PIGFX_REG_SIZE]);
  95                     break;
  96                 case OP_TYPE_WORD:
  97                     return be16toh(*(( uint16_t *) (&rtg_mem[address - PIGFX_REG_SIZE])));
  98                     break;
  99                 case OP_TYPE_LONGWORD:
 100                     return be32toh(*(( uint32_t *) (&rtg_mem[address - PIGFX_REG_SIZE])));
 101                     break;
 102                 default:
 103                     return 0;
 104             }
 105         }
 106     }
 107
 108     return 0;
 109 }
 110
 111 struct timespec diff(struct timespec start, struct timespec end)
 112 {
 113     struct timespec temp;
 114     if ((end.tv_nsec-start.tv_nsec)<0) {
 115         temp.tv_sec = end.tv_sec-start.tv_sec-1;
 116         temp.tv_nsec = 1000000000+end.tv_nsec-start.tv_nsec;
 117     } else {
 118         temp.tv_sec = end.tv_sec-start.tv_sec;
 119         temp.tv_nsec = end.tv_nsec-start.tv_nsec;
 120     }
 121     return temp;
 122 }
 123
 124 #define CHKREG(a, b) case a: b = value; break;
 125
 126 void rtg_write(uint32_t address, uint32_t value, uint8_t mode) {
 127     //printf("%s write to RTG: %.8X (%.8X)\n", op_type_names[mode], address, value);
 128     if (address >= PIGFX_REG_SIZE) {
 129         /*if ((address - PIGFX_REG_SIZE) < framebuffer_addr) {// || (address - PIGFX_REG_SIZE) > framebuffer_addr + ((rtg_display_width << rtg_display_format) * rtg_display_height)) {
 130             printf("Write to RTG memory outside frame buffer %.8X (%.8X).\n", (address - PIGFX_REG_SIZE), framebuffer_addr);
 131         }*/
 132         if (rtg_mem && (address - PIGFX_REG_SIZE) < PIGFX_UPPER) {
 133             switch (mode) {
 134                 case OP_TYPE_BYTE:
 135                     rtg_mem[address - PIGFX_REG_SIZE] = value;
 136                     break;
 137                 case OP_TYPE_WORD:
 138                     *(( uint16_t *) (&rtg_mem[address - PIGFX_REG_SIZE])) = htobe16(value);
 139                     break;
 140                 case OP_TYPE_LONGWORD:
 141                     *(( uint32_t *) (&rtg_mem[address - PIGFX_REG_SIZE])) = htobe32(value);
 142                     break;
 143                 default:
 144                     return;
 145             }
 146         }
 147     }
 148     else {
 149         switch (mode) {
 150             case OP_TYPE_BYTE:
 151                 switch (address) {
 152                     CHKREG(RTG_U81, rtg_u8[0]);
 153                     CHKREG(RTG_U82, rtg_u8[1]);
 154                     CHKREG(RTG_U83, rtg_u8[2]);
 155                     CHKREG(RTG_U84, rtg_u8[3]);
 156                 }
 157                 break;
 158             case OP_TYPE_WORD:
 159                 switch (address) {
 160                     CHKREG(RTG_X1, rtg_x[0]);
 161                     CHKREG(RTG_X2, rtg_x[1]);
 162                     CHKREG(RTG_X3, rtg_x[2]);
 163                     CHKREG(RTG_X4, rtg_x[3]);
 164                     CHKREG(RTG_X5, rtg_x[4]);
 165                     CHKREG(RTG_Y1, rtg_y[0]);
 166                     CHKREG(RTG_Y2, rtg_y[1]);
 167                     CHKREG(RTG_Y3, rtg_y[2]);
 168                     CHKREG(RTG_Y4, rtg_y[3]);
 169                     CHKREG(RTG_Y5, rtg_y[4]);
 170                     CHKREG(RTG_U1, rtg_user[0]);
 171                     CHKREG(RTG_U2, rtg_user[1]);
 172                     CHKREG(RTG_FORMAT, rtg_format);
 173                     case RTG_COMMAND:
 174                         handle_rtg_command(value);
 175                         break;
 176                 }
 177                 break;
 178             case OP_TYPE_LONGWORD:
 179                 switch (address) {
 180                     case RTG_ADDR1:
 181                         rtg_address[0] = value;
 182                         rtg_address_adj[0] = value - (PIGFX_RTG_BASE + PIGFX_REG_SIZE);
 183                         break;
 184                     case RTG_ADDR2:
 185                         rtg_address[1] = value;
 186                         rtg_address_adj[1] = value - (PIGFX_RTG_BASE + PIGFX_REG_SIZE);
 187                         break;
 188                     CHKREG(RTG_ADDR3, rtg_address[2]);
 189                     CHKREG(RTG_ADDR4, rtg_address[3]);
 190                     CHKREG(RTG_RGB1, rtg_rgb[0]);
 191                     CHKREG(RTG_RGB2, rtg_rgb[1]);
 192                 }
 193                 break;
 194         }
 195     }
 196
 197     return;
 198 }
 199
 200 #define gdebug(a) if (realtime_graphics_debug) { printf(a); m68k_end_timeslice(); cpu_emulation_running = 0; }
 201
 202 static void handle_rtg_command(uint32_t cmd) {
 203   //printf("Handling RTG command %d (%.8X)\n", cmd, cmd);
 204     switch (cmd) {
 205         case RTGCMD_SETGC:
 206             rtg_display_format = rtg_format;
 207             rtg_display_width = rtg_x[0];
 208             rtg_display_height = rtg_y[0];
 209             if (rtg_u8[0]) {
 210                 //rtg_pitch = rtg_display_width << rtg_format;
 211                 framebuffer_addr_adj = framebuffer_addr + (rtg_offset_x << rtg_display_format) + (rtg_offset_y * rtg_pitch);
 212                 rtg_total_rows = rtg_y[1];
 213             }
 214             else {
 215                 //rtg_pitch = rtg_display_width << rtg_format;
 216                 framebuffer_addr_adj = framebuffer_addr + (rtg_offset_x << rtg_display_format) + (rtg_offset_y * rtg_pitch);
 217                 rtg_total_rows = rtg_y[1];
 218             }
 219             //printf("Set RTG mode:\n");
 220             //printf("%dx%d pixels\n", rtg_display_width, rtg_display_height);
 221             //printf("Pixel format: %s\n", rtg_format_names[rtg_display_format]);
 222             break;
 223         case RTGCMD_SETPAN:
 224             //printf("Command: SetPan.\n");
 225             rtg_offset_x = rtg_x[1];
 226             rtg_offset_y = rtg_y[1];
 227             rtg_pitch = (rtg_x[0] << rtg_display_format);
 228             framebuffer_addr = rtg_address[0] - (PIGFX_RTG_BASE + PIGFX_REG_SIZE);
 229             framebuffer_addr_adj = framebuffer_addr + (rtg_offset_x << rtg_display_format) + (rtg_offset_y * rtg_pitch);
 230             //printf("Set panning to $%.8X (%.8X)\n", framebuffer_addr, rtg_address[0]);
 231             //printf("(Panned: $%.8X)\n", framebuffer_addr_adj);
 232             //printf("Offset X/Y: %d/%d\n", rtg_offset_x, rtg_offset_y);
 233             printf("Pitch: %d (%d bytes)\n", rtg_x[0], rtg_pitch);
 234             break;
 235         case RTGCMD_SETCLUT: {
 236             //printf("Command: SetCLUT.\n");
 237             //printf("Set palette entry %d to %d, %d, %d\n", rtg_u8[0], rtg_u8[1], rtg_u8[2], rtg_u8[3]);
 238             //printf("Set palette entry %d to 32-bit palette color: %.8X\n", rtg_u8[0], rtg_rgb[0]);
 239             rtg_set_clut_entry(rtg_u8[0], rtg_rgb[0]);
 240             break;
 241         }
 242         case RTGCMD_SETDISPLAY:
 243             //printf("RTG SetDisplay %s\n", (rtg_u8[1]) ? "enabled" : "disabled");
 244             // I remeber wrongs.
 245             //printf("Command: SetDisplay.\n");
 246             break;
 247         case RTGCMD_ENABLE:
 248         case RTGCMD_SETSWITCH:
 249             //printf("RTG SetSwitch %s\n", ((rtg_x[0]) & 0x01) ? "enabled" : "disabled");
 250             //printf("LAL: %.4X\n", rtg_x[0]);
 251             if (display_enabled != ((rtg_x[0]) & 0x01)) {
 252                 display_enabled = ((rtg_x[0]) & 0x01);
 253                 if (display_enabled) {
 254                     rtg_init_display();
 255                 }
 256                 else
 257                     rtg_shutdown_display();
 258             }
 259             break;
 260         case RTGCMD_FILLRECT:
 261             if (rtg_u8[0] == 0xFF || rtg_format != RTGFMT_8BIT) {
 262                 rtg_fillrect_solid(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_rgb[0], rtg_x[2], rtg_format);
 263                 gdebug("FillRect Solid\n");
 264             }
 265             else {
 266                 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]);
 267                 gdebug("FillRect Masked\n");
 268             }
 269             break;
 270         case RTGCMD_INVERTRECT:
 271             rtg_invertrect(rtg_x[0], rtg_y[0], rtg_x[1], rtg_y[1], rtg_x[2], rtg_format, rtg_u8[0]);
 272             gdebug("InvertRect\n");
 273             break;
 274         case RTGCMD_BLITRECT:
 275             if (rtg_u8[0] == 0xFF || rtg_format != RTGFMT_8BIT) {
 276                 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);
 277                 gdebug("BlitRect Solid\n");
 278             }
 279             else {
 280                 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]);
 281                 gdebug("BlitRect Masked\n");
 282             }
 283             break;
 284         case RTGCMD_BLITRECT_NOMASK_COMPLETE:
 285             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]);
 286             gdebug("BlitRectNoMaskComplete\n");
 287             break;
 288         case RTGCMD_BLITPATTERN:
 289             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]);
 290             gdebug("BlitPattern\n");
 291             return;
 292         case RTGCMD_BLITTEMPLATE:
 293             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]);
 294             gdebug("BlitTemplate\n");
 295             break;
 296         case RTGCMD_DRAWLINE:
 297             if (rtg_u8[0] == 0xFF && rtg_y[2] == 0xFFFF)
 298                 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);
 299             else
 300                 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]);
 301             gdebug("DrawLine\n");
 302             break;
 303         case RTGCMD_P2C:
 304             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]]);
 305             //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]);
 306             gdebug("Planar2Chunky\n");
 307             break;
 308         case RTGCMD_P2D:
 309             break;
 310     }
 311 }