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comparison cd_graphics.c @ 2271:3ef80963c2a7

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Fix stamp address mask and add WIP CD graphics debug view
author Michael Pavone <pavone@retrodev.com>
date Thu, 29 Dec 2022 15:47:19 -0800
parents da326c32ad8f
children a1afe26a8ef0
comparison
equal deleted inserted replaced
2270:827ab6dd534a 2271:3ef80963c2a7
1 #include "cd_graphics.h" 1 #include "cd_graphics.h"
2 #include "backend.h" 2 #include "backend.h"
3 #include "render.h"
3 4
4 void cd_graphics_init(segacd_context *cd) 5 void cd_graphics_init(segacd_context *cd)
5 { 6 {
6 cd->graphics_int_cycle = CYCLE_NEVER; 7 cd->graphics_int_cycle = CYCLE_NEVER;
7 } 8 }
20 uint16_t stamp_num_mask; 21 uint16_t stamp_num_mask;
21 if (cd->gate_array[GA_STAMP_SIZE] & BIT_STS) { 22 if (cd->gate_array[GA_STAMP_SIZE] & BIT_STS) {
22 //32x32 stamps 23 //32x32 stamps
23 stamp_shift = 5; 24 stamp_shift = 5;
24 pixel_mask = 0x1F; 25 pixel_mask = 0x1F;
25 stamp_num_mask = 0x3FC; 26 stamp_num_mask = 0x7FC;
26 } else { 27 } else {
27 //16x16 stamps 28 //16x16 stamps
28 stamp_shift = 4; 29 stamp_shift = 4;
29 pixel_mask = 0xF; 30 pixel_mask = 0xF;
30 stamp_num_mask = 0x3FF; 31 stamp_num_mask = 0x7FF;
31 } 32 }
32 uint16_t stamp_x = x >> stamp_shift; 33 uint16_t stamp_x = x >> stamp_shift;
33 uint16_t stamp_y = y >> stamp_shift; 34 uint16_t stamp_y = y >> stamp_shift;
34 uint16_t max, base_mask; 35 uint16_t max, base_mask;
35 uint32_t row_shift; 36 uint32_t row_shift;
247 CHECK_ONLY; 248 CHECK_ONLY;
248 } 249 }
249 } 250 }
250 } 251 }
251 252
253 void scd_toggle_graphics_debug(segacd_context *cd)
254 {
255 if (cd->graphics_debug_window) {
256 render_destroy_window(cd->graphics_debug_window);
257 cd->graphics_debug_window = 0;
258 } else {
259 cd->graphics_debug_window = render_create_window("CD ASIC", 1024, 1024, NULL);
260 }
261 }
262
263 static void render_graphics_debug(segacd_context *cd)
264 {
265 int pitch;
266 uint32_t *fb = render_get_framebuffer(cd->graphics_debug_window, &pitch);
267 uint32_t pixels = (cd->gate_array[GA_STAMP_SIZE] & BIT_SMS) ? 4096 : 256;
268 uint32_t stamp_size = (cd->gate_array[GA_STAMP_SIZE] & BIT_STS) ? 32 : 16;
269 uint32_t num_stamps = pixels / stamp_size;
270 //TODO: fix mask based on SMS and STS
271 uint32_t address = (cd->gate_array[GA_STAMP_MAP_BASE] & 0xFFE0) << 1;
272 genesis_context *gen = cd->genesis;
273 for (uint32_t stamp_y = 0; stamp_y < num_stamps; stamp_y++)
274 {
275 uint32_t start_y = stamp_y * stamp_size;
276 for (uint32_t stamp_x = 0; stamp_x < num_stamps; stamp_x++)
277 {
278 uint16_t entry = cd->word_ram[address++];
279 uint32_t tile_address = (entry & 0x7FF) << 6;
280 //TODO: flip and rotation
281 uint32_t start_x = stamp_x * stamp_size;
282 if (start_x < 1024 && start_y < 1024) {
283 for (uint32_t tile_x = start_x; tile_x < start_x + stamp_size; tile_x+=8)
284 {
285 for (uint32_t y = start_y; y < start_y + stamp_size; y++)
286 {
287 uint32_t *line = fb + y * pitch / sizeof(uint32_t);
288 for (uint32_t x = tile_x; x < tile_x + 8; x += 4)
289 {
290
291 uint16_t word = cd->word_ram[tile_address++];
292 uint16_t pixels[4] = {
293 word >> 12,
294 word >> 8 & 0xF,
295 word >> 4 & 0xF,
296 word & 0xF
297 };
298 for (uint32_t i = 0; i < 4; i++)
299 {
300 line[x + i] = gen->vdp->colors[pixels[i]];
301 }
302 }
303 }
304 }
305 }
306 }
307 }
308 render_framebuffer_updated(cd->graphics_debug_window, 1024);
309 }
310
252 void cd_graphics_run(segacd_context *cd, uint32_t cycle) 311 void cd_graphics_run(segacd_context *cd, uint32_t cycle)
253 { 312 {
254 while (cd->graphics_cycle < cycle) 313 while (cd->graphics_cycle < cycle)
255 { 314 {
256 if (cd->gate_array[GA_STAMP_SIZE] & BIT_GRON) { 315 if (cd->gate_array[GA_STAMP_SIZE] & BIT_GRON) {
261 { 320 {
262 } 321 }
263 if (cd->graphics_cycle >= cd->graphics_int_cycle) { 322 if (cd->graphics_cycle >= cd->graphics_int_cycle) {
264 printf("graphics end %u\n", cd->graphics_cycle); 323 printf("graphics end %u\n", cd->graphics_cycle);
265 cd->gate_array[GA_STAMP_SIZE] &= ~BIT_GRON; 324 cd->gate_array[GA_STAMP_SIZE] &= ~BIT_GRON;
325
326 if (cd->graphics_debug_window) {
327 render_graphics_debug(cd);
328 }
266 break; 329 break;
267 } 330 }
268 } else { 331 } else {
269 cd->graphics_cycle = cycle; 332 cd->graphics_cycle = cycle;
270 } 333 }