| 1 | /* |
| 2 | * Copyright (C) 2011 Gilead Kutnick "Exophase" <exophase@gmail.com> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License as |
| 6 | * published by the Free Software Foundation; either version 2 of |
| 7 | * the License, or (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * General Public License for more details. |
| 13 | */ |
| 14 | |
| 15 | #include <stdio.h> |
| 16 | #include <stdlib.h> |
| 17 | #include <malloc.h> |
| 18 | #include <math.h> |
| 19 | |
| 20 | #include "common.h" |
| 21 | |
| 22 | typedef s32 fixed_type; |
| 23 | |
| 24 | #define EDGE_STEP_BITS 32 |
| 25 | #define FIXED_BITS 12 |
| 26 | |
| 27 | #define fixed_center(value) \ |
| 28 | ((((fixed_type)value) << FIXED_BITS) + (1 << (FIXED_BITS - 1))) \ |
| 29 | |
| 30 | #define int_to_fixed(value) \ |
| 31 | (((fixed_type)value) << FIXED_BITS) \ |
| 32 | |
| 33 | #define fixed_to_int(value) \ |
| 34 | ((value) >> FIXED_BITS) \ |
| 35 | |
| 36 | #define fixed_mul(_a, _b) \ |
| 37 | (((s64)(_a) * (_b)) >> FIXED_BITS) \ |
| 38 | |
| 39 | #define fixed_to_double(value) \ |
| 40 | ((value) / (double)(1 << FIXED_BITS)) \ |
| 41 | |
| 42 | #define double_to_fixed(value) \ |
| 43 | (fixed_type)(((value) * (double)(1 << FIXED_BITS))) \ |
| 44 | |
| 45 | typedef struct |
| 46 | { |
| 47 | fixed_type current_value; |
| 48 | fixed_type step_dx; |
| 49 | fixed_type step_dy; |
| 50 | fixed_type gradient_area_x; |
| 51 | fixed_type gradient_area_y; |
| 52 | } interpolant_struct; |
| 53 | |
| 54 | typedef struct |
| 55 | { |
| 56 | s32 base_x; |
| 57 | |
| 58 | s64 left_x; |
| 59 | s64 left_dx_dy; |
| 60 | |
| 61 | s64 right_x; |
| 62 | s64 right_dx_dy; |
| 63 | |
| 64 | u32 triangle_area; |
| 65 | u32 triangle_winding; |
| 66 | |
| 67 | interpolant_struct u; |
| 68 | interpolant_struct v; |
| 69 | interpolant_struct r; |
| 70 | interpolant_struct g; |
| 71 | interpolant_struct b; |
| 72 | } _span_struct; |
| 73 | |
| 74 | |
| 75 | u32 span_pixels = 0; |
| 76 | u32 span_pixel_blocks = 0; |
| 77 | u32 spans = 0; |
| 78 | u32 triangles = 0; |
| 79 | |
| 80 | u32 texels_4bpp = 0; |
| 81 | u32 texels_8bpp = 0; |
| 82 | u32 texels_16bpp = 0; |
| 83 | u32 untextured_pixels = 0; |
| 84 | u32 blend_pixels = 0; |
| 85 | u32 transparent_pixels = 0; |
| 86 | |
| 87 | u32 state_changes = 0; |
| 88 | u32 render_buffer_flushes = 0; |
| 89 | u32 trivial_rejects = 0; |
| 90 | |
| 91 | void flush_render_block_buffer(psx_gpu_struct *psx_gpu) |
| 92 | { |
| 93 | |
| 94 | } |
| 95 | |
| 96 | |
| 97 | u32 fixed_reciprocal(u32 denominator, u32 *_shift) |
| 98 | { |
| 99 | u32 shift = __builtin_clz(denominator); |
| 100 | u32 denominator_normalized = denominator << shift; |
| 101 | |
| 102 | // Implement with a DP divide |
| 103 | u32 reciprocal = |
| 104 | (double)((1ULL << 62) + (denominator_normalized - 1)) / |
| 105 | (double)denominator_normalized; |
| 106 | |
| 107 | *_shift = 62 - shift; |
| 108 | return reciprocal; |
| 109 | } |
| 110 | |
| 111 | fixed_type fixed_reciprocal_multiply(s32 numerator, u32 reciprocal, |
| 112 | u32 reciprocal_sign, u32 shift) |
| 113 | { |
| 114 | u32 numerator_sign = (u32)numerator >> 31; |
| 115 | u32 flip_sign = numerator_sign ^ reciprocal_sign; |
| 116 | u32 flip_sign_mask = ~(flip_sign - 1); |
| 117 | fixed_type value; |
| 118 | |
| 119 | numerator = abs(numerator); |
| 120 | |
| 121 | value = ((u64)numerator * reciprocal) >> shift; |
| 122 | |
| 123 | value ^= flip_sign_mask; |
| 124 | value -= flip_sign_mask; |
| 125 | |
| 126 | return value; |
| 127 | } |
| 128 | |
| 129 | s32 triangle_signed_area_x2(s32 x0, s32 y0, s32 x1, s32 y1, s32 x2, s32 y2) |
| 130 | { |
| 131 | return ((x1 - x0) * (y2 - y1)) - ((x2 - x1) * (y1 - y0)); |
| 132 | } |
| 133 | |
| 134 | u32 fetch_texel_4bpp(psx_gpu_struct *psx_gpu, u32 u, u32 v) |
| 135 | { |
| 136 | u8 *texture_ptr_8bpp = psx_gpu->texture_page_ptr; |
| 137 | u32 texel = texture_ptr_8bpp[(v * 2048) + (u / 2)]; |
| 138 | |
| 139 | if(u & 1) |
| 140 | texel >>= 4; |
| 141 | else |
| 142 | texel &= 0xF; |
| 143 | |
| 144 | texels_4bpp++; |
| 145 | |
| 146 | return psx_gpu->clut_ptr[texel]; |
| 147 | } |
| 148 | |
| 149 | u32 fetch_texel_8bpp(psx_gpu_struct *psx_gpu, u32 u, u32 v) |
| 150 | { |
| 151 | u8 *texture_ptr_8bpp = psx_gpu->texture_page_ptr; |
| 152 | u32 texel = texture_ptr_8bpp[(v * 2048) + u]; |
| 153 | |
| 154 | texels_8bpp++; |
| 155 | |
| 156 | return psx_gpu->clut_ptr[texel]; |
| 157 | } |
| 158 | |
| 159 | u32 fetch_texel_16bpp(psx_gpu_struct *psx_gpu, u32 u, u32 v) |
| 160 | { |
| 161 | u16 *texture_ptr_16bpp = psx_gpu->texture_page_ptr; |
| 162 | |
| 163 | texels_16bpp++; |
| 164 | |
| 165 | return texture_ptr_16bpp[(v * 1024) + u]; |
| 166 | } |
| 167 | |
| 168 | u32 fetch_texel(psx_gpu_struct *psx_gpu, u32 u, u32 v) |
| 169 | { |
| 170 | u &= psx_gpu->texture_mask_width; |
| 171 | v &= psx_gpu->texture_mask_height; |
| 172 | |
| 173 | switch(psx_gpu->texture_mode) |
| 174 | { |
| 175 | case TEXTURE_MODE_4BPP: |
| 176 | return fetch_texel_4bpp(psx_gpu, u, v); |
| 177 | |
| 178 | case TEXTURE_MODE_8BPP: |
| 179 | return fetch_texel_8bpp(psx_gpu, u, v); |
| 180 | |
| 181 | case TEXTURE_MODE_16BPP: |
| 182 | return fetch_texel_16bpp(psx_gpu, u, v); |
| 183 | } |
| 184 | |
| 185 | return 0; |
| 186 | } |
| 187 | |
| 188 | void draw_pixel(psx_gpu_struct *psx_gpu, s32 r, s32 g, s32 b, u32 texel, |
| 189 | u32 x, u32 y, u32 flags) |
| 190 | { |
| 191 | u32 pixel; |
| 192 | |
| 193 | if(r > 31) |
| 194 | r = 31; |
| 195 | |
| 196 | if(g > 31) |
| 197 | g = 31; |
| 198 | |
| 199 | if(b > 31) |
| 200 | b = 31; |
| 201 | |
| 202 | if(flags & RENDER_FLAGS_BLEND) |
| 203 | { |
| 204 | if(((flags & RENDER_FLAGS_TEXTURE_MAP) == 0) || (texel & 0x8000)) |
| 205 | { |
| 206 | s32 fb_pixel = psx_gpu->vram[(y * 1024) + x]; |
| 207 | s32 fb_r = fb_pixel & 0x1F; |
| 208 | s32 fb_g = (fb_pixel >> 5) & 0x1F; |
| 209 | s32 fb_b = (fb_pixel >> 10) & 0x1F; |
| 210 | |
| 211 | blend_pixels++; |
| 212 | |
| 213 | switch(psx_gpu->blend_mode) |
| 214 | { |
| 215 | case BLEND_MODE_AVERAGE: |
| 216 | r = (r + fb_r) / 2; |
| 217 | g = (g + fb_g) / 2; |
| 218 | b = (b + fb_b) / 2; |
| 219 | break; |
| 220 | |
| 221 | case BLEND_MODE_ADD: |
| 222 | r += fb_r; |
| 223 | g += fb_g; |
| 224 | b += fb_b; |
| 225 | |
| 226 | if(r > 31) |
| 227 | r = 31; |
| 228 | |
| 229 | if(g > 31) |
| 230 | g = 31; |
| 231 | |
| 232 | if(b > 31) |
| 233 | b = 31; |
| 234 | |
| 235 | break; |
| 236 | |
| 237 | case BLEND_MODE_SUBTRACT: |
| 238 | r = fb_r - r; |
| 239 | g = fb_g - g; |
| 240 | b = fb_b - b; |
| 241 | |
| 242 | if(r < 0) |
| 243 | r = 0; |
| 244 | |
| 245 | if(g < 0) |
| 246 | g = 0; |
| 247 | |
| 248 | if(b < 0) |
| 249 | b = 0; |
| 250 | |
| 251 | break; |
| 252 | |
| 253 | case BLEND_MODE_ADD_FOURTH: |
| 254 | r = fb_r + (r / 4); |
| 255 | g = fb_g + (g / 4); |
| 256 | b = fb_b + (b / 4); |
| 257 | |
| 258 | if(r > 31) |
| 259 | r = 31; |
| 260 | |
| 261 | if(g > 31) |
| 262 | g = 31; |
| 263 | |
| 264 | if(b > 31) |
| 265 | b = 31; |
| 266 | |
| 267 | break; |
| 268 | } |
| 269 | } |
| 270 | } |
| 271 | |
| 272 | pixel = r | (g << 5) | (b << 10); |
| 273 | |
| 274 | if(psx_gpu->mask_apply || (texel & 0x8000)) |
| 275 | pixel |= 0x8000; |
| 276 | |
| 277 | psx_gpu->vram[(y * 1024) + x] = pixel; |
| 278 | } |
| 279 | |
| 280 | s32 dither_table[4][4] = |
| 281 | { |
| 282 | { -4, 0, -3, 1 }, |
| 283 | { 2, -2, 3, -1 }, |
| 284 | { -3, 1, -4, 0 }, |
| 285 | { 3, -1, 2, -2 }, |
| 286 | }; |
| 287 | |
| 288 | void render_span(psx_gpu_struct *psx_gpu, _span_struct *span, s32 y, |
| 289 | u32 flags) |
| 290 | { |
| 291 | s32 left_x = span->left_x >> EDGE_STEP_BITS; |
| 292 | s32 right_x = span->right_x >> EDGE_STEP_BITS; |
| 293 | s32 current_x = left_x; |
| 294 | s32 delta_x; |
| 295 | |
| 296 | fixed_type current_u = span->u.current_value; |
| 297 | fixed_type current_v = span->v.current_value; |
| 298 | fixed_type current_r = span->r.current_value; |
| 299 | fixed_type current_g = span->g.current_value; |
| 300 | fixed_type current_b = span->b.current_value; |
| 301 | |
| 302 | if(y < psx_gpu->viewport_start_y) |
| 303 | return; |
| 304 | |
| 305 | if(y > psx_gpu->viewport_end_y) |
| 306 | return; |
| 307 | |
| 308 | if(right_x < psx_gpu->viewport_start_x) |
| 309 | return; |
| 310 | |
| 311 | if(current_x > psx_gpu->viewport_end_x) |
| 312 | return; |
| 313 | |
| 314 | spans++; |
| 315 | |
| 316 | if(current_x < psx_gpu->viewport_start_x) |
| 317 | current_x = psx_gpu->viewport_start_x; |
| 318 | |
| 319 | if(right_x > psx_gpu->viewport_end_x + 1) |
| 320 | right_x = psx_gpu->viewport_end_x + 1; |
| 321 | |
| 322 | delta_x = current_x - span->base_x; |
| 323 | |
| 324 | current_u += delta_x * span->u.step_dx; |
| 325 | current_v += delta_x * span->v.step_dx; |
| 326 | current_r += delta_x * span->r.step_dx; |
| 327 | current_g += delta_x * span->g.step_dx; |
| 328 | current_b += delta_x * span->b.step_dx; |
| 329 | |
| 330 | span_pixels += right_x - current_x; |
| 331 | span_pixel_blocks += ((right_x / 8) - (current_x / 8)) + 1; |
| 332 | |
| 333 | while(current_x < right_x) |
| 334 | { |
| 335 | s32 color_r, color_g, color_b; |
| 336 | u32 texel = 0; |
| 337 | |
| 338 | if(psx_gpu->mask_evaluate && |
| 339 | (psx_gpu->vram[(y * 1024) + current_x] & 0x8000)) |
| 340 | { |
| 341 | goto skip_pixel; |
| 342 | } |
| 343 | |
| 344 | if(flags & RENDER_FLAGS_SHADE) |
| 345 | { |
| 346 | color_r = fixed_to_int(current_r); |
| 347 | color_g = fixed_to_int(current_g); |
| 348 | color_b = fixed_to_int(current_b); |
| 349 | } |
| 350 | else |
| 351 | { |
| 352 | color_r = psx_gpu->primitive_color & 0xFF; |
| 353 | color_g = (psx_gpu->primitive_color >> 8) & 0xFF; |
| 354 | color_b = (psx_gpu->primitive_color >> 16) & 0xFF; |
| 355 | } |
| 356 | |
| 357 | if(flags & RENDER_FLAGS_TEXTURE_MAP) |
| 358 | { |
| 359 | u32 texel_r, texel_g, texel_b; |
| 360 | u32 u = fixed_to_int(current_u); |
| 361 | u32 v = fixed_to_int(current_v); |
| 362 | |
| 363 | texel = fetch_texel(psx_gpu, u, v); |
| 364 | |
| 365 | if(texel == 0) |
| 366 | { |
| 367 | transparent_pixels++; |
| 368 | goto skip_pixel; |
| 369 | } |
| 370 | |
| 371 | texel_r = texel & 0x1F; |
| 372 | texel_g = (texel >> 5) & 0x1F; |
| 373 | texel_b = (texel >> 10) & 0x1F; |
| 374 | |
| 375 | if((flags & RENDER_FLAGS_MODULATE_TEXELS) == 0) |
| 376 | { |
| 377 | color_r *= texel_r; |
| 378 | color_g *= texel_g; |
| 379 | color_b *= texel_b; |
| 380 | } |
| 381 | else |
| 382 | { |
| 383 | color_r = texel_r << 7; |
| 384 | color_g = texel_g << 7; |
| 385 | color_b = texel_b << 7; |
| 386 | } |
| 387 | |
| 388 | color_r >>= 4; |
| 389 | color_g >>= 4; |
| 390 | color_b >>= 4; |
| 391 | } |
| 392 | else |
| 393 | { |
| 394 | untextured_pixels++; |
| 395 | } |
| 396 | |
| 397 | if(psx_gpu->dither_mode && ((flags & RENDER_FLAGS_SHADE) || |
| 398 | ((flags & RENDER_FLAGS_TEXTURE_MAP) && |
| 399 | ((flags & RENDER_FLAGS_MODULATE_TEXELS) == 0)))) |
| 400 | { |
| 401 | s32 dither_offset = dither_table[y % 4][current_x % 4]; |
| 402 | color_r += dither_offset; |
| 403 | color_g += dither_offset; |
| 404 | color_b += dither_offset; |
| 405 | |
| 406 | if(color_r < 0) |
| 407 | color_r = 0; |
| 408 | |
| 409 | if(color_g < 0) |
| 410 | color_g = 0; |
| 411 | |
| 412 | if(color_b < 0) |
| 413 | color_b = 0; |
| 414 | } |
| 415 | |
| 416 | color_r >>= 3; |
| 417 | color_g >>= 3; |
| 418 | color_b >>= 3; |
| 419 | |
| 420 | draw_pixel(psx_gpu, color_r, color_g, color_b, texel, current_x, y, flags); |
| 421 | |
| 422 | skip_pixel: |
| 423 | |
| 424 | current_u += span->u.step_dx; |
| 425 | current_v += span->v.step_dx; |
| 426 | current_r += span->r.step_dx; |
| 427 | current_g += span->g.step_dx; |
| 428 | current_b += span->b.step_dx; |
| 429 | |
| 430 | current_x++; |
| 431 | } |
| 432 | } |
| 433 | |
| 434 | void increment_span(_span_struct *span) |
| 435 | { |
| 436 | span->left_x += span->left_dx_dy; |
| 437 | span->right_x += span->right_dx_dy; |
| 438 | |
| 439 | span->u.current_value += span->u.step_dy; |
| 440 | span->v.current_value += span->v.step_dy; |
| 441 | span->r.current_value += span->r.step_dy; |
| 442 | span->g.current_value += span->g.step_dy; |
| 443 | span->b.current_value += span->b.step_dy; |
| 444 | } |
| 445 | |
| 446 | void decrement_span(_span_struct *span) |
| 447 | { |
| 448 | span->left_x += span->left_dx_dy; |
| 449 | span->right_x += span->right_dx_dy; |
| 450 | |
| 451 | span->u.current_value -= span->u.step_dy; |
| 452 | span->v.current_value -= span->v.step_dy; |
| 453 | span->r.current_value -= span->r.step_dy; |
| 454 | span->g.current_value -= span->g.step_dy; |
| 455 | span->b.current_value -= span->b.step_dy; |
| 456 | } |
| 457 | |
| 458 | |
| 459 | #define compute_gradient_area_x(interpolant) \ |
| 460 | { \ |
| 461 | span.interpolant.gradient_area_x = \ |
| 462 | triangle_signed_area_x2(a->interpolant, a->y, b->interpolant, b->y, \ |
| 463 | c->interpolant, c->y); \ |
| 464 | } \ |
| 465 | |
| 466 | #define compute_gradient_area_y(interpolant) \ |
| 467 | { \ |
| 468 | span.interpolant.gradient_area_y = \ |
| 469 | triangle_signed_area_x2(a->x, a->interpolant, b->x, b->interpolant, \ |
| 470 | c->x, c->interpolant); \ |
| 471 | } \ |
| 472 | |
| 473 | #define compute_all_gradient_areas() \ |
| 474 | compute_gradient_area_x(u); \ |
| 475 | compute_gradient_area_x(v); \ |
| 476 | compute_gradient_area_x(r); \ |
| 477 | compute_gradient_area_x(g); \ |
| 478 | compute_gradient_area_x(b); \ |
| 479 | compute_gradient_area_y(u); \ |
| 480 | compute_gradient_area_y(v); \ |
| 481 | compute_gradient_area_y(r); \ |
| 482 | compute_gradient_area_y(g); \ |
| 483 | compute_gradient_area_y(b) \ |
| 484 | |
| 485 | #define set_interpolant_base(interpolant, base_vertex) \ |
| 486 | span->interpolant.step_dx = \ |
| 487 | fixed_reciprocal_multiply(span->interpolant.gradient_area_x, reciprocal, \ |
| 488 | span->triangle_winding, shift); \ |
| 489 | span->interpolant.step_dy = \ |
| 490 | fixed_reciprocal_multiply(span->interpolant.gradient_area_y, reciprocal, \ |
| 491 | span->triangle_winding, shift); \ |
| 492 | span->interpolant.current_value = fixed_center(base_vertex->interpolant) \ |
| 493 | |
| 494 | #define set_interpolant_bases(base_vertex) \ |
| 495 | { \ |
| 496 | u32 shift; \ |
| 497 | u32 reciprocal = fixed_reciprocal(span->triangle_area, &shift); \ |
| 498 | shift -= FIXED_BITS; \ |
| 499 | set_interpolant_base(u, base_vertex); \ |
| 500 | set_interpolant_base(v, base_vertex); \ |
| 501 | set_interpolant_base(r, base_vertex); \ |
| 502 | set_interpolant_base(g, base_vertex); \ |
| 503 | set_interpolant_base(b, base_vertex); \ |
| 504 | span->base_x = span->left_x >> EDGE_STEP_BITS; \ |
| 505 | } \ |
| 506 | |
| 507 | #define compute_edge_delta(edge, start, end, height) \ |
| 508 | { \ |
| 509 | s32 x_start = start->x; \ |
| 510 | s32 x_end = end->x; \ |
| 511 | s32 width = x_end - x_start; \ |
| 512 | \ |
| 513 | s32 shift = __builtin_clz(height); \ |
| 514 | u32 height_normalized = height << shift; \ |
| 515 | u32 height_reciprocal = ((1ULL << 50) + (height_normalized - 1)) / \ |
| 516 | height_normalized; \ |
| 517 | \ |
| 518 | shift -= (50 - EDGE_STEP_BITS); \ |
| 519 | \ |
| 520 | span->edge##_x = \ |
| 521 | ((((s64)x_start * height) + (height - 1)) * height_reciprocal) << shift; \ |
| 522 | span->edge##_dx_dy = ((s64)width * height_reciprocal) << shift; \ |
| 523 | } \ |
| 524 | |
| 525 | |
| 526 | #define render_spans_up(height) \ |
| 527 | do \ |
| 528 | { \ |
| 529 | decrement_span(span); \ |
| 530 | render_span(psx_gpu, span, current_y, flags); \ |
| 531 | current_y--; \ |
| 532 | height--; \ |
| 533 | } while(height) \ |
| 534 | |
| 535 | #define render_spans_down(height) \ |
| 536 | do \ |
| 537 | { \ |
| 538 | render_span(psx_gpu, span, current_y, flags); \ |
| 539 | increment_span(span); \ |
| 540 | current_y++; \ |
| 541 | height--; \ |
| 542 | } while(height) \ |
| 543 | |
| 544 | #define render_spans_up_up(minor, major) \ |
| 545 | s32 current_y = bottom->y - 1; \ |
| 546 | s32 height_minor_a = bottom->y - middle->y; \ |
| 547 | s32 height_minor_b = middle->y - top->y; \ |
| 548 | s32 height_major = height_minor_a + height_minor_b; \ |
| 549 | \ |
| 550 | compute_edge_delta(major, bottom, top, height_major); \ |
| 551 | compute_edge_delta(minor, bottom, middle, height_minor_a); \ |
| 552 | set_interpolant_bases(bottom); \ |
| 553 | \ |
| 554 | render_spans_up(height_minor_a); \ |
| 555 | \ |
| 556 | compute_edge_delta(minor, middle, top, height_minor_b); \ |
| 557 | render_spans_up(height_minor_b) \ |
| 558 | |
| 559 | void render_spans_up_left(psx_gpu_struct *psx_gpu, _span_struct *span, |
| 560 | vertex_struct *bottom, vertex_struct *middle, vertex_struct *top, u32 flags) |
| 561 | { |
| 562 | render_spans_up_up(left, right); |
| 563 | } |
| 564 | |
| 565 | void render_spans_up_right(psx_gpu_struct *psx_gpu, _span_struct *span, |
| 566 | vertex_struct *bottom, vertex_struct *middle, vertex_struct *top, u32 flags) |
| 567 | { |
| 568 | render_spans_up_up(right, left); |
| 569 | } |
| 570 | |
| 571 | #define render_spans_down_down(minor, major) \ |
| 572 | s32 current_y = top->y; \ |
| 573 | s32 height_minor_a = middle->y - top->y; \ |
| 574 | s32 height_minor_b = bottom->y - middle->y; \ |
| 575 | s32 height_major = height_minor_a + height_minor_b; \ |
| 576 | \ |
| 577 | compute_edge_delta(minor, top, middle, height_minor_a); \ |
| 578 | compute_edge_delta(major, top, bottom, height_major); \ |
| 579 | set_interpolant_bases(top); \ |
| 580 | \ |
| 581 | render_spans_down(height_minor_a); \ |
| 582 | \ |
| 583 | compute_edge_delta(minor, middle, bottom, height_minor_b); \ |
| 584 | render_spans_down(height_minor_b) \ |
| 585 | |
| 586 | void render_spans_down_left(psx_gpu_struct *psx_gpu, _span_struct *span, |
| 587 | vertex_struct *top, vertex_struct *middle, vertex_struct *bottom, u32 flags) |
| 588 | { |
| 589 | render_spans_down_down(left, right); |
| 590 | } |
| 591 | |
| 592 | void render_spans_down_right(psx_gpu_struct *psx_gpu, _span_struct *span, |
| 593 | vertex_struct *top, vertex_struct *middle, vertex_struct *bottom, u32 flags) |
| 594 | { |
| 595 | render_spans_down_down(right, left); |
| 596 | } |
| 597 | |
| 598 | #define render_spans_up_flat(bottom_left, bottom_right, top_left, top_right) \ |
| 599 | s32 current_y = bottom_left->y - 1; \ |
| 600 | s32 height = bottom_left->y - top_left->y; \ |
| 601 | \ |
| 602 | compute_edge_delta(left, bottom_left, top_left, height); \ |
| 603 | compute_edge_delta(right, bottom_right, top_right, height); \ |
| 604 | set_interpolant_bases(bottom_left); \ |
| 605 | render_spans_up(height) \ |
| 606 | |
| 607 | void render_spans_up_a(psx_gpu_struct *psx_gpu, _span_struct *span, |
| 608 | vertex_struct *bottom_left, vertex_struct *bottom_right, vertex_struct *top, |
| 609 | u32 flags) |
| 610 | { |
| 611 | render_spans_up_flat(bottom_left, bottom_right, top, top); |
| 612 | } |
| 613 | |
| 614 | void render_spans_up_b(psx_gpu_struct *psx_gpu, _span_struct *span, |
| 615 | vertex_struct *bottom, vertex_struct *top_left, vertex_struct *top_right, |
| 616 | u32 flags) |
| 617 | { |
| 618 | render_spans_up_flat(bottom, bottom, top_left, top_right); |
| 619 | } |
| 620 | |
| 621 | #define render_spans_down_flat(top_left, top_right, bottom_left, bottom_right) \ |
| 622 | s32 current_y = top_left->y; \ |
| 623 | s32 height = bottom_left->y - top_left->y; \ |
| 624 | \ |
| 625 | compute_edge_delta(left, top_left, bottom_left, height); \ |
| 626 | compute_edge_delta(right, top_right, bottom_right, height); \ |
| 627 | set_interpolant_bases(top_left); \ |
| 628 | render_spans_down(height) \ |
| 629 | |
| 630 | void render_spans_down_a(psx_gpu_struct *psx_gpu, _span_struct *span, |
| 631 | vertex_struct *top_left, vertex_struct *top_right, vertex_struct *bottom, |
| 632 | u32 flags) |
| 633 | { |
| 634 | render_spans_down_flat(top_left, top_right, bottom, bottom); |
| 635 | } |
| 636 | |
| 637 | void render_spans_down_b(psx_gpu_struct *psx_gpu, _span_struct *span, |
| 638 | vertex_struct *top, vertex_struct *bottom_left, vertex_struct *bottom_right, |
| 639 | u32 flags) |
| 640 | { |
| 641 | render_spans_down_flat(top, top, bottom_left, bottom_right); |
| 642 | } |
| 643 | |
| 644 | void render_spans_up_down(psx_gpu_struct *psx_gpu, _span_struct *span, |
| 645 | vertex_struct *middle, vertex_struct *top, vertex_struct *bottom, u32 flags) |
| 646 | { |
| 647 | s32 middle_y = middle->y; |
| 648 | s32 current_y = middle_y - 1; |
| 649 | s32 height_minor_a = middle->y - top->y; |
| 650 | s32 height_minor_b = bottom->y - middle->y; |
| 651 | s32 height_major = height_minor_a + height_minor_b; |
| 652 | |
| 653 | u64 right_x_mid; |
| 654 | |
| 655 | compute_edge_delta(left, middle, top, height_minor_a); |
| 656 | compute_edge_delta(right, bottom, top, height_major); |
| 657 | set_interpolant_bases(middle); |
| 658 | |
| 659 | right_x_mid = span->right_x + (span->right_dx_dy * height_minor_b); |
| 660 | span->right_x = right_x_mid; |
| 661 | |
| 662 | render_spans_up(height_minor_a); |
| 663 | |
| 664 | compute_edge_delta(left, middle, bottom, height_minor_b); |
| 665 | set_interpolant_bases(middle); |
| 666 | |
| 667 | span->right_dx_dy *= -1; |
| 668 | span->right_x = right_x_mid; |
| 669 | current_y = middle_y; |
| 670 | |
| 671 | render_spans_down(height_minor_b); |
| 672 | } |
| 673 | |
| 674 | #define vertex_swap(_a, _b) \ |
| 675 | { \ |
| 676 | vertex_struct *temp_vertex = _a; \ |
| 677 | _a = _b; \ |
| 678 | _b = temp_vertex; \ |
| 679 | triangle_winding ^= 1; \ |
| 680 | } \ |
| 681 | |
| 682 | |
| 683 | #define triangle_y_direction_up 1 |
| 684 | #define triangle_y_direction_flat 2 |
| 685 | #define triangle_y_direction_down 0 |
| 686 | |
| 687 | #define triangle_winding_positive 0 |
| 688 | #define triangle_winding_negative 1 |
| 689 | |
| 690 | #define triangle_set_direction(direction_variable, value) \ |
| 691 | u32 direction_variable = (u32)(value) >> 31; \ |
| 692 | if(value == 0) \ |
| 693 | direction_variable = 2 \ |
| 694 | |
| 695 | #define triangle_case(direction_a, direction_b, direction_c, winding) \ |
| 696 | case (triangle_y_direction_##direction_a | \ |
| 697 | (triangle_y_direction_##direction_b << 2) | \ |
| 698 | (triangle_y_direction_##direction_c << 4) | \ |
| 699 | (triangle_winding_##winding << 6)) \ |
| 700 | |
| 701 | |
| 702 | void render_triangle(psx_gpu_struct *psx_gpu, vertex_struct *vertexes, |
| 703 | u32 flags) |
| 704 | { |
| 705 | s32 triangle_area; |
| 706 | u32 triangle_winding = 0; |
| 707 | _span_struct span; |
| 708 | |
| 709 | vertex_struct *a = &(vertexes[0]); |
| 710 | vertex_struct *b = &(vertexes[1]); |
| 711 | vertex_struct *c = &(vertexes[2]); |
| 712 | |
| 713 | triangle_area = triangle_signed_area_x2(a->x, a->y, b->x, b->y, c->x, c->y); |
| 714 | |
| 715 | triangles++; |
| 716 | |
| 717 | if(triangle_area == 0) |
| 718 | return; |
| 719 | |
| 720 | if(b->y < a->y) |
| 721 | vertex_swap(a, b); |
| 722 | |
| 723 | if(c->y < b->y) |
| 724 | { |
| 725 | vertex_swap(b, c); |
| 726 | |
| 727 | if(b->y < a->y) |
| 728 | vertex_swap(a, b); |
| 729 | } |
| 730 | |
| 731 | if((c->y - a->y) >= 512) |
| 732 | return; |
| 733 | |
| 734 | if(triangle_area < 0) |
| 735 | { |
| 736 | triangle_area = -triangle_area; |
| 737 | triangle_winding ^= 1; |
| 738 | vertex_swap(a, c); |
| 739 | } |
| 740 | |
| 741 | if(b->x < a->x) |
| 742 | vertex_swap(a, b); |
| 743 | |
| 744 | if(c->x < b->x) |
| 745 | { |
| 746 | vertex_swap(b, c); |
| 747 | |
| 748 | if(b->x < a->x) |
| 749 | vertex_swap(a, b); |
| 750 | } |
| 751 | |
| 752 | if((c->x - a->x) >= 1024) |
| 753 | return; |
| 754 | |
| 755 | s32 y_delta_a = b->y - a->y; |
| 756 | s32 y_delta_b = c->y - b->y; |
| 757 | s32 y_delta_c = c->y - a->y; |
| 758 | |
| 759 | triangle_set_direction(y_direction_a, y_delta_a); |
| 760 | triangle_set_direction(y_direction_b, y_delta_b); |
| 761 | triangle_set_direction(y_direction_c, y_delta_c); |
| 762 | |
| 763 | compute_all_gradient_areas(); |
| 764 | span.triangle_area = triangle_area; |
| 765 | span.triangle_winding = triangle_winding; |
| 766 | |
| 767 | switch(y_direction_a | (y_direction_b << 2) | (y_direction_c << 4) | |
| 768 | (triangle_winding << 6)) |
| 769 | { |
| 770 | triangle_case(up, up, up, negative): |
| 771 | triangle_case(up, up, flat, negative): |
| 772 | triangle_case(up, up, down, negative): |
| 773 | render_spans_up_right(psx_gpu, &span, a, b, c, flags); |
| 774 | break; |
| 775 | |
| 776 | triangle_case(flat, up, up, negative): |
| 777 | triangle_case(flat, up, flat, negative): |
| 778 | triangle_case(flat, up, down, negative): |
| 779 | render_spans_up_a(psx_gpu, &span, a, b, c, flags); |
| 780 | break; |
| 781 | |
| 782 | triangle_case(down, up, up, negative): |
| 783 | render_spans_up_down(psx_gpu, &span, a, c, b, flags); |
| 784 | break; |
| 785 | |
| 786 | triangle_case(down, up, flat, negative): |
| 787 | render_spans_down_a(psx_gpu, &span, a, c, b, flags); |
| 788 | break; |
| 789 | |
| 790 | triangle_case(down, up, down, negative): |
| 791 | render_spans_down_right(psx_gpu, &span, a, c, b, flags); |
| 792 | break; |
| 793 | |
| 794 | triangle_case(down, flat, up, negative): |
| 795 | triangle_case(down, flat, flat, negative): |
| 796 | triangle_case(down, flat, down, negative): |
| 797 | render_spans_down_b(psx_gpu, &span, a, b, c, flags); |
| 798 | break; |
| 799 | |
| 800 | triangle_case(down, down, up, negative): |
| 801 | triangle_case(down, down, flat, negative): |
| 802 | triangle_case(down, down, down, negative): |
| 803 | render_spans_down_left(psx_gpu, &span, a, b, c, flags); |
| 804 | break; |
| 805 | |
| 806 | triangle_case(up, up, up, positive): |
| 807 | triangle_case(up, up, flat, positive): |
| 808 | triangle_case(up, up, down, positive): |
| 809 | render_spans_up_left(psx_gpu, &span, a, b, c, flags); |
| 810 | break; |
| 811 | |
| 812 | triangle_case(up, flat, up, positive): |
| 813 | triangle_case(up, flat, flat, positive): |
| 814 | triangle_case(up, flat, down, positive): |
| 815 | render_spans_up_b(psx_gpu, &span, a, b, c, flags); |
| 816 | break; |
| 817 | |
| 818 | triangle_case(up, down, up, positive): |
| 819 | render_spans_up_right(psx_gpu, &span, a, c, b, flags); |
| 820 | break; |
| 821 | |
| 822 | triangle_case(up, down, flat, positive): |
| 823 | render_spans_up_a(psx_gpu, &span, a, c, b, flags); |
| 824 | break; |
| 825 | |
| 826 | triangle_case(up, down, down, positive): |
| 827 | render_spans_up_down(psx_gpu, &span, a, b, c, flags); |
| 828 | break; |
| 829 | |
| 830 | triangle_case(flat, down, up, positive): |
| 831 | triangle_case(flat, down, flat, positive): |
| 832 | triangle_case(flat, down, down, positive): |
| 833 | render_spans_down_a(psx_gpu, &span, a, b, c, flags); |
| 834 | break; |
| 835 | |
| 836 | triangle_case(down, down, up, positive): |
| 837 | triangle_case(down, down, flat, positive): |
| 838 | triangle_case(down, down, down, positive): |
| 839 | render_spans_down_right(psx_gpu, &span, a, b, c, flags); |
| 840 | break; |
| 841 | } |
| 842 | |
| 843 | } |
| 844 | |
| 845 | |
| 846 | void render_sprite(psx_gpu_struct *psx_gpu, s32 x, s32 y, u32 u, u32 v, |
| 847 | s32 width, s32 height, u32 flags) |
| 848 | { |
| 849 | // TODO: Flip/mirror |
| 850 | s32 current_x, current_y; |
| 851 | u32 current_u, current_v; |
| 852 | u32 primitive_color = psx_gpu->primitive_color; |
| 853 | u32 sprite_r, sprite_g, sprite_b; |
| 854 | s32 color_r = 0; |
| 855 | s32 color_g = 0; |
| 856 | s32 color_b = 0; |
| 857 | u32 texel = 0; |
| 858 | |
| 859 | sprite_r = primitive_color & 0xFF; |
| 860 | sprite_g = (primitive_color >> 8) & 0xFF; |
| 861 | sprite_b = (primitive_color >> 16) & 0xFF; |
| 862 | |
| 863 | static u32 sprites = 0; |
| 864 | |
| 865 | sprites++; |
| 866 | |
| 867 | for(current_y = y, current_v = v; |
| 868 | current_y < y + height; current_y++, current_v++) |
| 869 | { |
| 870 | for(current_x = x, current_u = u; |
| 871 | current_x < x + width; current_x++, current_u++) |
| 872 | { |
| 873 | if((current_x >= psx_gpu->viewport_start_x) && |
| 874 | (current_y >= psx_gpu->viewport_start_y) && |
| 875 | (current_x <= psx_gpu->viewport_end_x) && |
| 876 | (current_y <= psx_gpu->viewport_end_y)) |
| 877 | { |
| 878 | if(psx_gpu->mask_evaluate && |
| 879 | (psx_gpu->vram[(y * 1024) + current_x] & 0x8000)) |
| 880 | { |
| 881 | continue; |
| 882 | } |
| 883 | |
| 884 | if(flags & RENDER_FLAGS_TEXTURE_MAP) |
| 885 | { |
| 886 | texel = fetch_texel(psx_gpu, current_u, current_v); |
| 887 | if(texel == 0) |
| 888 | continue; |
| 889 | |
| 890 | color_r = texel & 0x1F; |
| 891 | color_g = (texel >> 5) & 0x1F; |
| 892 | color_b = (texel >> 10) & 0x1F; |
| 893 | |
| 894 | if((flags & RENDER_FLAGS_MODULATE_TEXELS) == 0) |
| 895 | { |
| 896 | color_r *= sprite_r; |
| 897 | color_g *= sprite_g; |
| 898 | color_b *= sprite_b; |
| 899 | |
| 900 | color_r >>= 7; |
| 901 | color_g >>= 7; |
| 902 | color_b >>= 7; |
| 903 | } |
| 904 | } |
| 905 | else |
| 906 | { |
| 907 | color_r = sprite_r >> 3; |
| 908 | color_g = sprite_g >> 3; |
| 909 | color_b = sprite_b >> 3; |
| 910 | } |
| 911 | |
| 912 | draw_pixel(psx_gpu, color_r, color_g, color_b, texel, current_x, |
| 913 | current_y, flags); |
| 914 | } |
| 915 | } |
| 916 | } |
| 917 | } |
| 918 | |
| 919 | |
| 920 | #define draw_pixel_line(_x, _y) \ |
| 921 | if((_x >= psx_gpu->viewport_start_x) && (_y >= psx_gpu->viewport_start_y) && \ |
| 922 | (_x <= psx_gpu->viewport_end_x) && (_y <= psx_gpu->viewport_end_y)) \ |
| 923 | { \ |
| 924 | if(flags & RENDER_FLAGS_SHADE) \ |
| 925 | { \ |
| 926 | color_r = fixed_to_int(current_r); \ |
| 927 | color_g = fixed_to_int(current_g); \ |
| 928 | color_b = fixed_to_int(current_b); \ |
| 929 | \ |
| 930 | current_r += gradient_r; \ |
| 931 | current_g += gradient_g; \ |
| 932 | current_b += gradient_b; \ |
| 933 | } \ |
| 934 | else \ |
| 935 | { \ |
| 936 | color_r = primitive_color & 0xFF; \ |
| 937 | color_g = (primitive_color >> 8) & 0xFF; \ |
| 938 | color_b = (primitive_color >> 16) & 0xFF; \ |
| 939 | } \ |
| 940 | \ |
| 941 | if(psx_gpu->dither_mode) \ |
| 942 | { \ |
| 943 | s32 dither_offset = dither_table[_y % 4][_x % 4]; \ |
| 944 | \ |
| 945 | color_r += dither_offset; \ |
| 946 | color_g += dither_offset; \ |
| 947 | color_b += dither_offset; \ |
| 948 | \ |
| 949 | if(color_r < 0) \ |
| 950 | color_r = 0; \ |
| 951 | \ |
| 952 | if(color_g < 0) \ |
| 953 | color_g = 0; \ |
| 954 | \ |
| 955 | if(color_b < 0) \ |
| 956 | color_b = 0; \ |
| 957 | } \ |
| 958 | color_r >>= 3; \ |
| 959 | color_g >>= 3; \ |
| 960 | color_b >>= 3; \ |
| 961 | \ |
| 962 | span_pixels++; \ |
| 963 | \ |
| 964 | draw_pixel(psx_gpu, color_r, color_g, color_b, 0, _x, _y, flags); \ |
| 965 | } \ |
| 966 | |
| 967 | #define update_increment(value) \ |
| 968 | value++ \ |
| 969 | |
| 970 | #define update_decrement(value) \ |
| 971 | value-- \ |
| 972 | |
| 973 | #define compare_increment(a, b) \ |
| 974 | (a <= b) \ |
| 975 | |
| 976 | #define compare_decrement(a, b) \ |
| 977 | (a >= b) \ |
| 978 | |
| 979 | #define set_line_gradients(minor) \ |
| 980 | { \ |
| 981 | s32 gradient_divisor = delta_##minor; \ |
| 982 | gradient_r = int_to_fixed(vertex_b->r - vertex_a->r) / gradient_divisor; \ |
| 983 | gradient_g = int_to_fixed(vertex_b->g - vertex_a->g) / gradient_divisor; \ |
| 984 | gradient_b = int_to_fixed(vertex_b->b - vertex_a->b) / gradient_divisor; \ |
| 985 | current_r = fixed_center(vertex_a->r); \ |
| 986 | current_g = fixed_center(vertex_a->g); \ |
| 987 | current_b = fixed_center(vertex_a->b); \ |
| 988 | } |
| 989 | |
| 990 | #define draw_line_span_horizontal(direction) \ |
| 991 | do \ |
| 992 | { \ |
| 993 | error_step = delta_y * 2; \ |
| 994 | error_wrap = delta_x * 2; \ |
| 995 | error = delta_x; \ |
| 996 | \ |
| 997 | current_y = y_a; \ |
| 998 | set_line_gradients(x); \ |
| 999 | \ |
| 1000 | for(current_x = x_a; current_x <= x_b; current_x++) \ |
| 1001 | { \ |
| 1002 | draw_pixel_line(current_x, current_y); \ |
| 1003 | error += error_step; \ |
| 1004 | \ |
| 1005 | if(error >= error_wrap) \ |
| 1006 | { \ |
| 1007 | update_##direction(current_y); \ |
| 1008 | error -= error_wrap; \ |
| 1009 | } \ |
| 1010 | } \ |
| 1011 | } while(0) \ |
| 1012 | |
| 1013 | #define draw_line_span_vertical(direction) \ |
| 1014 | do \ |
| 1015 | { \ |
| 1016 | error_step = delta_x * 2; \ |
| 1017 | error_wrap = delta_y * 2; \ |
| 1018 | error = delta_y; \ |
| 1019 | \ |
| 1020 | current_x = x_a; \ |
| 1021 | set_line_gradients(y); \ |
| 1022 | \ |
| 1023 | for(current_y = y_a; compare_##direction(current_y, y_b); \ |
| 1024 | update_##direction(current_y)) \ |
| 1025 | { \ |
| 1026 | draw_pixel_line(current_x, current_y); \ |
| 1027 | error += error_step; \ |
| 1028 | \ |
| 1029 | if(error > error_wrap) \ |
| 1030 | { \ |
| 1031 | current_x++; \ |
| 1032 | error -= error_wrap; \ |
| 1033 | } \ |
| 1034 | } \ |
| 1035 | } while(0) \ |
| 1036 | |
| 1037 | void render_line(psx_gpu_struct *psx_gpu, vertex_struct *vertexes, u32 flags) |
| 1038 | { |
| 1039 | u32 primitive_color = psx_gpu->primitive_color; |
| 1040 | s32 color_r, color_g, color_b; |
| 1041 | |
| 1042 | fixed_type gradient_r = 0; |
| 1043 | fixed_type gradient_g = 0; |
| 1044 | fixed_type gradient_b = 0; |
| 1045 | fixed_type current_r = 0; |
| 1046 | fixed_type current_g = 0; |
| 1047 | fixed_type current_b = 0; |
| 1048 | |
| 1049 | s32 y_a, y_b; |
| 1050 | s32 x_a, x_b; |
| 1051 | |
| 1052 | s32 delta_x, delta_y; |
| 1053 | u32 triangle_winding = 0; |
| 1054 | |
| 1055 | s32 current_x; |
| 1056 | s32 current_y; |
| 1057 | |
| 1058 | u32 error_step; |
| 1059 | u32 error; |
| 1060 | u32 error_wrap; |
| 1061 | |
| 1062 | vertex_struct *vertex_a = &(vertexes[0]); |
| 1063 | vertex_struct *vertex_b = &(vertexes[1]); |
| 1064 | |
| 1065 | if(vertex_a->x >= vertex_b->x) |
| 1066 | { |
| 1067 | vertex_swap(vertex_a, vertex_b); |
| 1068 | } |
| 1069 | |
| 1070 | x_a = vertex_a->x; |
| 1071 | x_b = vertex_b->x; |
| 1072 | |
| 1073 | y_a = vertex_a->y; |
| 1074 | y_b = vertex_b->y; |
| 1075 | |
| 1076 | delta_x = x_b - x_a; |
| 1077 | delta_y = y_b - y_a; |
| 1078 | |
| 1079 | if(delta_x >= 1024) |
| 1080 | return; |
| 1081 | |
| 1082 | flags &= ~RENDER_FLAGS_TEXTURE_MAP; |
| 1083 | |
| 1084 | if(delta_y < 0) |
| 1085 | { |
| 1086 | delta_y *= -1; |
| 1087 | |
| 1088 | if(delta_y >= 512) |
| 1089 | return; |
| 1090 | |
| 1091 | if(delta_x > delta_y) |
| 1092 | draw_line_span_horizontal(decrement); |
| 1093 | else |
| 1094 | draw_line_span_vertical(decrement); |
| 1095 | } |
| 1096 | else |
| 1097 | { |
| 1098 | if(delta_y >= 512) |
| 1099 | return; |
| 1100 | |
| 1101 | if(delta_x > delta_y) |
| 1102 | draw_line_span_horizontal(increment); |
| 1103 | else |
| 1104 | draw_line_span_vertical(increment); |
| 1105 | } |
| 1106 | } |
| 1107 | |
| 1108 | |
| 1109 | void render_block_fill(psx_gpu_struct *psx_gpu, u32 color, u32 x, u32 y, |
| 1110 | u32 width, u32 height) |
| 1111 | { |
| 1112 | u32 r = color & 0xFF; |
| 1113 | u32 g = (color >> 8) & 0xFF; |
| 1114 | u32 b = (color >> 16) & 0xFF; |
| 1115 | u32 color_16bpp = (r >> 3) | ((g >> 3) << 5) | ((b >> 3) << 10); |
| 1116 | |
| 1117 | u16 *vram_ptr = psx_gpu->vram + x + (y * 1024); |
| 1118 | u32 draw_x, draw_y; |
| 1119 | |
| 1120 | for(draw_y = 0; draw_y < height; draw_y++) |
| 1121 | { |
| 1122 | for(draw_x = 0; draw_x < width; draw_x++) |
| 1123 | { |
| 1124 | vram_ptr[draw_x] = color_16bpp; |
| 1125 | } |
| 1126 | |
| 1127 | vram_ptr += 1024; |
| 1128 | } |
| 1129 | } |
| 1130 | |
| 1131 | void render_block_copy(psx_gpu_struct *psx_gpu, u16 *source, u32 x, u32 y, |
| 1132 | u32 width, u32 height, u32 pitch) |
| 1133 | { |
| 1134 | u16 *vram_ptr = psx_gpu->vram + x + (y * 1024); |
| 1135 | u32 draw_x, draw_y; |
| 1136 | |
| 1137 | for(draw_y = 0; draw_y < height; draw_y++) |
| 1138 | { |
| 1139 | for(draw_x = 0; draw_x < width; draw_x++) |
| 1140 | { |
| 1141 | vram_ptr[draw_x] = source[draw_x]; |
| 1142 | } |
| 1143 | |
| 1144 | source += pitch; |
| 1145 | vram_ptr += 1024; |
| 1146 | } |
| 1147 | } |
| 1148 | |
| 1149 | void render_block_move(psx_gpu_struct *psx_gpu, u32 source_x, u32 source_y, |
| 1150 | u32 dest_x, u32 dest_y, u32 width, u32 height) |
| 1151 | { |
| 1152 | render_block_copy(psx_gpu, psx_gpu->vram + source_x + (source_y * 1024), |
| 1153 | dest_x, dest_y, width, height, 1024); |
| 1154 | } |
| 1155 | |
| 1156 | void initialize_psx_gpu(psx_gpu_struct *psx_gpu) |
| 1157 | { |
| 1158 | psx_gpu->pixel_count_mode = 0; |
| 1159 | psx_gpu->pixel_compare_mode = 0; |
| 1160 | |
| 1161 | psx_gpu->vram_pixel_counts_a = malloc(sizeof(u8) * 1024 * 512); |
| 1162 | psx_gpu->vram_pixel_counts_b = malloc(sizeof(u8) * 1024 * 512); |
| 1163 | memset(psx_gpu->vram_pixel_counts_a, 0, sizeof(u8) * 1024 * 512); |
| 1164 | memset(psx_gpu->vram_pixel_counts_b, 0, sizeof(u8) * 1024 * 512); |
| 1165 | psx_gpu->compare_vram = malloc(sizeof(u16) * 1024 * 512); |
| 1166 | } |