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