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comparison vdp.c @ 43:3fc57e1a2c56

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Add debug render mode and fix vertical flip bit for bg tiles
author Mike Pavone <pavone@retrodev.com>
date Sun, 09 Dec 2012 18:40:45 -0800
parents 6653e67a6811
children 3b79cbcf6846
comparison
equal deleted inserted replaced
42:6653e67a6811 43:3fc57e1a2c56
291 291
292 void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context) 292 void render_map(uint16_t col, uint8_t * tmp_buf, vdp_context * context)
293 { 293 {
294 uint16_t address = ((col & 0x7FF) << 5); 294 uint16_t address = ((col & 0x7FF) << 5);
295 if (col & MAP_BIT_V_FLIP) { 295 if (col & MAP_BIT_V_FLIP) {
296 address += 24 - 4 * context->v_offset; 296 address += 28 - 4 * context->v_offset;
297 } else { 297 } else {
298 address += 4 * context->v_offset; 298 address += 4 * context->v_offset;
299 } 299 }
300 uint16_t pal_priority = (col >> 9) & 0x70; 300 uint16_t pal_priority = (col >> 9) & 0x70;
301 int32_t dir; 301 int32_t dir;
340 if (col) 340 if (col)
341 { 341 {
342 col-=2; 342 col-=2;
343 dst = context->framebuf + line * 320 + col * 8; 343 dst = context->framebuf + line * 320 + col * 8;
344 sprite_buf = context->linebuf + col * 8; 344 sprite_buf = context->linebuf + col * 8;
345 uint16_t a_src;
345 if (context->flags & FLAG_WINDOW) { 346 if (context->flags & FLAG_WINDOW) {
346 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW; 347 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW;
348 a_src = FBUF_SRC_W;
347 } else { 349 } else {
348 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW - (context->hscroll_a & 0xF); 350 plane_a = context->tmp_buf_a + SCROLL_BUFFER_DRAW - (context->hscroll_a & 0xF);
351 a_src = FBUF_SRC_A;
349 } 352 }
350 plane_b = context->tmp_buf_b + SCROLL_BUFFER_DRAW - (context->hscroll_b & 0xF); 353 plane_b = context->tmp_buf_b + SCROLL_BUFFER_DRAW - (context->hscroll_b & 0xF);
351 end = dst + 16; 354 end = dst + 16;
355 uint16_t src;
352 //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7)); 356 //printf("A | tmp_buf offset: %d\n", 8 - (context->hscroll_a & 0x7));
353 for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) { 357 for (; dst < end; ++plane_a, ++plane_b, ++sprite_buf, ++dst) {
354 uint8_t pixel; 358 uint8_t pixel;
355 if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) { 359 if (*sprite_buf & BUF_BIT_PRIORITY && *sprite_buf & 0xF) {
356 pixel = *sprite_buf; 360 pixel = *sprite_buf;
361 src = FBUF_SRC_S;
357 } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) { 362 } else if (*plane_a & BUF_BIT_PRIORITY && *plane_a & 0xF) {
358 pixel = *plane_a; 363 pixel = *plane_a;
364 src = a_src;
359 } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) { 365 } else if (*plane_b & BUF_BIT_PRIORITY && *plane_b & 0xF) {
360 pixel = *plane_b; 366 pixel = *plane_b;
367 src = FBUF_SRC_B;
361 } else if (*sprite_buf & 0xF) { 368 } else if (*sprite_buf & 0xF) {
362 pixel = *sprite_buf; 369 pixel = *sprite_buf;
370 src = FBUF_SRC_S;
363 } else if (*plane_a & 0xF) { 371 } else if (*plane_a & 0xF) {
364 pixel = *plane_a; 372 pixel = *plane_a;
373 src = a_src;
365 } else if (*plane_b & 0xF){ 374 } else if (*plane_b & 0xF){
366 pixel = *plane_b; 375 pixel = *plane_b;
376 src = FBUF_SRC_B;
367 } else { 377 } else {
368 pixel = context->regs[REG_BG_COLOR] & 0x3F; 378 pixel = context->regs[REG_BG_COLOR] & 0x3F;
369 } 379 src = FBUF_SRC_BG;
370 *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? 0x1000 : 0); 380 }
381 *dst = context->cram[pixel & 0x3F] | ((pixel & BUF_BIT_PRIORITY) ? FBUF_BIT_PRIORITY : 0) | src;
371 } 382 }
372 } else { 383 } else {
373 //dst = context->framebuf + line * 320; 384 //dst = context->framebuf + line * 320;
374 //sprite_buf = context->linebuf + col * 8; 385 //sprite_buf = context->linebuf + col * 8;
375 //plane_a = context->tmp_buf_a + 16 - (context->hscroll_a & 0x7); 386 //plane_a = context->tmp_buf_a + 16 - (context->hscroll_a & 0x7);