1 /* Display a cleared blue window. This demo has no dependencies on
2 * any utility code, just the graw interface and gallium.
3 */
4
5 #include "frontend/graw.h"
6 #include "pipe/p_screen.h"
7 #include "pipe/p_context.h"
8 #include "pipe/p_shader_tokens.h"
9 #include "pipe/p_state.h"
10 #include "pipe/p_defines.h"
11
12 #include <stdio.h> /* for fread(), etc */
13
14 #include "util/u_inlines.h"
15 #include "util/u_memory.h" /* Offset() */
16 #include "util/u_draw_quad.h"
17 #include "util/u_box.h"
18
19 static const char *filename = NULL;
20 unsigned show_fps = 0;
21
22
usage(char * name)23 static void usage(char *name)
24 {
25 fprintf(stderr, "usage: %s [ options ] shader_filename\n", name);
26 #ifndef _WIN32
27 fprintf(stderr, "\n" );
28 fprintf(stderr, "options:\n");
29 fprintf(stderr, " -fps show frames per second\n");
30 #endif
31 }
32
33
34 enum pipe_format formats[] = {
35 PIPE_FORMAT_RGBA8888_UNORM,
36 PIPE_FORMAT_BGRA8888_UNORM,
37 PIPE_FORMAT_NONE
38 };
39
40 static const int WIDTH = 250;
41 static const int HEIGHT = 250;
42
43 static struct pipe_screen *screen = NULL;
44 static struct pipe_context *ctx = NULL;
45 static struct pipe_resource *rttex = NULL;
46 static struct pipe_resource *constbuf = NULL;
47 static struct pipe_surface *surf = NULL;
48 static struct pipe_sampler_view *sv = NULL;
49 static void *sampler = NULL;
50 static void *window = NULL;
51 static struct pipe_resource *samptex = NULL;
52
53 struct vertex {
54 float position[4];
55 float color[3];
56 };
57
58 /* Draw a regular mesh
59 */
60 #define MESH_SZ 16
61 static struct vertex vertices[MESH_SZ * MESH_SZ];
62
63 static float constants[] =
64 { 0.4, 0, 0, 1,
65 1, 1, 1, 1,
66 2, 2, 2, 2,
67 4, 8, 16, 32,
68
69 3, 0, 0, 0,
70 0, .5, 0, 0,
71 0, 0, 1, 0,
72 0, 0, 0, 1,
73
74 1, 0, 0, 0.5,
75 0, 1, 0, 0.5,
76 0, 0, 1, 0,
77 0, 0, 0, 1,
78 };
79
init_fs_constbuf(void)80 static void init_fs_constbuf( void )
81 {
82 struct pipe_resource templat;
83 struct pipe_box box;
84
85 memset(&templat, 0, sizeof(templat));
86 templat.target = PIPE_BUFFER;
87 templat.format = PIPE_FORMAT_R8_UNORM;
88 templat.width0 = sizeof(constants);
89 templat.height0 = 1;
90 templat.depth0 = 1;
91 templat.array_size = 1;
92 templat.last_level = 0;
93 templat.bind = PIPE_BIND_CONSTANT_BUFFER;
94
95 constbuf = screen->resource_create(screen,
96 &templat);
97 if (constbuf == NULL)
98 exit(4);
99
100
101 u_box_2d(0,0,sizeof(constants),1, &box);
102
103 ctx->buffer_subdata(ctx, constbuf,
104 PIPE_MAP_WRITE,
105 0, sizeof(constants), constants);
106
107 pipe_set_constant_buffer(ctx,
108 PIPE_SHADER_VERTEX, 0,
109 constbuf);
110 }
111
112
set_viewport(float x,float y,float width,float height,float zNear,float zFar)113 static void set_viewport( float x, float y,
114 float width, float height,
115 float zNear, float zFar)
116 {
117 float z = zFar;
118 float half_width = (float)width / 2.0f;
119 float half_height = (float)height / 2.0f;
120 float half_depth = ((float)zFar - (float)zNear) / 2.0f;
121 struct pipe_viewport_state vp;
122
123 vp.scale[0] = half_width;
124 vp.scale[1] = half_height;
125 vp.scale[2] = half_depth;
126
127 vp.translate[0] = half_width + x;
128 vp.translate[1] = half_height + y;
129 vp.translate[2] = half_depth + z;
130
131 vp.swizzle_x = PIPE_VIEWPORT_SWIZZLE_POSITIVE_X;
132 vp.swizzle_y = PIPE_VIEWPORT_SWIZZLE_POSITIVE_Y;
133 vp.swizzle_z = PIPE_VIEWPORT_SWIZZLE_POSITIVE_Z;
134 vp.swizzle_w = PIPE_VIEWPORT_SWIZZLE_POSITIVE_W;
135
136 ctx->set_viewport_states( ctx, 0, 1, &vp );
137 }
138
set_vertices(void)139 static void set_vertices( void )
140 {
141 struct pipe_vertex_element ve[2];
142 struct pipe_vertex_buffer vbuf;
143 void *handle;
144 int x,y;
145
146 memset(ve, 0, sizeof ve);
147
148 ve[0].src_offset = Offset(struct vertex, position);
149 ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
150 ve[1].src_offset = Offset(struct vertex, color);
151 ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
152
153 handle = ctx->create_vertex_elements_state(ctx, 2, ve);
154 ctx->bind_vertex_elements_state(ctx, handle);
155
156 for (x = 0; x < MESH_SZ; x++) {
157 for (y = 0; y < MESH_SZ; y++) {
158 int i = y * MESH_SZ + x;
159 vertices[i].position[0] = ((float)x)/MESH_SZ * 2.0 - 1.0;
160 vertices[i].position[1] = ((float)y)/MESH_SZ * 2.0 - 1.0;
161 vertices[i].position[2] = 0;
162 vertices[i].position[3] = 1.0;
163
164 vertices[i].color[0] = .5;
165 vertices[i].color[1] = (float)x / (float)MESH_SZ;
166 vertices[i].color[2] = (float)y / (float)MESH_SZ;
167 }
168 }
169
170 memset(&vbuf, 0, sizeof vbuf);
171
172 vbuf.stride = sizeof( struct vertex );
173 vbuf.buffer_offset = 0;
174 vbuf.buffer.resource = pipe_buffer_create_with_data(ctx,
175 PIPE_BIND_VERTEX_BUFFER,
176 PIPE_USAGE_DEFAULT,
177 sizeof(vertices),
178 vertices);
179
180 ctx->set_vertex_buffers(ctx, 0, 1, 0, false, &vbuf);
181 }
182
set_vertex_shader(void)183 static void set_vertex_shader( void )
184 {
185 FILE *f;
186 char buf[50000];
187 void *handle;
188 int sz;
189
190 if ((f = fopen(filename, "r")) == NULL) {
191 fprintf(stderr, "Couldn't open %s\n", filename);
192 exit(1);
193 }
194
195 sz = fread(buf, 1, sizeof(buf), f);
196 if (!feof(f)) {
197 printf("file too long\n");
198 exit(1);
199 }
200 printf("%.*s\n", sz, buf);
201 buf[sz] = 0;
202
203 handle = graw_parse_vertex_shader(ctx, buf);
204 ctx->bind_vs_state(ctx, handle);
205 fclose(f);
206 }
207
set_fragment_shader(void)208 static void set_fragment_shader( void )
209 {
210 void *handle;
211 const char *text =
212 "FRAG\n"
213 "DCL IN[0], COLOR, LINEAR\n"
214 "DCL OUT[0], COLOR\n"
215 " 0: MOV OUT[0], IN[0]\n"
216 " 1: END\n";
217
218 handle = graw_parse_fragment_shader(ctx, text);
219 ctx->bind_fs_state(ctx, handle);
220 }
221
222
223
draw(void)224 static void draw( void )
225 {
226 union pipe_color_union clear_color = { {.1,.3,.5,0} };
227
228 ctx->clear(ctx, PIPE_CLEAR_COLOR, NULL, &clear_color, 0, 0);
229 util_draw_arrays(ctx, PIPE_PRIM_POINTS, 0, ARRAY_SIZE(vertices));
230 ctx->flush(ctx, NULL, 0);
231
232 graw_save_surface_to_file(ctx, surf, NULL);
233
234 screen->flush_frontbuffer(screen, ctx, rttex, 0, 0, window, NULL);
235 }
236
237 #define SIZE 16
238
init_tex(void)239 static void init_tex( void )
240 {
241 struct pipe_sampler_view sv_template;
242 struct pipe_sampler_state sampler_desc;
243 struct pipe_resource templat;
244 struct pipe_box box;
245 ubyte tex2d[SIZE][SIZE][4];
246 int s, t;
247
248 #if (SIZE != 2)
249 for (s = 0; s < SIZE; s++) {
250 for (t = 0; t < SIZE; t++) {
251 if (0) {
252 int x = (s ^ t) & 1;
253 tex2d[t][s][0] = (x) ? 0 : 63;
254 tex2d[t][s][1] = (x) ? 0 : 128;
255 tex2d[t][s][2] = 0;
256 tex2d[t][s][3] = 0xff;
257 }
258 else {
259 int x = ((s ^ t) >> 2) & 1;
260 tex2d[t][s][0] = s*255/(SIZE-1);
261 tex2d[t][s][1] = t*255/(SIZE-1);
262 tex2d[t][s][2] = (x) ? 0 : 128;
263 tex2d[t][s][3] = 0xff;
264 }
265 }
266 }
267 #else
268 tex2d[0][0][0] = 0;
269 tex2d[0][0][1] = 255;
270 tex2d[0][0][2] = 255;
271 tex2d[0][0][3] = 0;
272
273 tex2d[0][1][0] = 0;
274 tex2d[0][1][1] = 0;
275 tex2d[0][1][2] = 255;
276 tex2d[0][1][3] = 255;
277
278 tex2d[1][0][0] = 255;
279 tex2d[1][0][1] = 255;
280 tex2d[1][0][2] = 0;
281 tex2d[1][0][3] = 255;
282
283 tex2d[1][1][0] = 255;
284 tex2d[1][1][1] = 0;
285 tex2d[1][1][2] = 0;
286 tex2d[1][1][3] = 255;
287 #endif
288
289 memset(&templat, 0, sizeof(templat));
290 templat.target = PIPE_TEXTURE_2D;
291 templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
292 templat.width0 = SIZE;
293 templat.height0 = SIZE;
294 templat.depth0 = 1;
295 templat.array_size = 1;
296 templat.last_level = 0;
297 templat.bind = PIPE_BIND_SAMPLER_VIEW;
298
299
300 samptex = screen->resource_create(screen,
301 &templat);
302 if (samptex == NULL)
303 exit(4);
304
305 u_box_2d(0,0,SIZE,SIZE, &box);
306
307 ctx->texture_subdata(ctx,
308 samptex,
309 0,
310 PIPE_MAP_WRITE,
311 &box,
312 tex2d,
313 sizeof tex2d[0],
314 sizeof tex2d);
315
316 /* Possibly read back & compare against original data:
317 */
318 if (0)
319 {
320 struct pipe_transfer *t;
321 uint32_t *ptr;
322 ptr = pipe_texture_map(ctx, samptex,
323 0, 0, /* level, layer */
324 PIPE_MAP_READ,
325 0, 0, SIZE, SIZE, &t); /* x, y, width, height */
326
327 if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
328 assert(0);
329 exit(9);
330 }
331
332 ctx->texture_unmap(ctx, t);
333 }
334
335 memset(&sv_template, 0, sizeof sv_template);
336 sv_template.format = samptex->format;
337 sv_template.texture = samptex;
338 sv_template.swizzle_r = 0;
339 sv_template.swizzle_g = 1;
340 sv_template.swizzle_b = 2;
341 sv_template.swizzle_a = 3;
342 sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
343 if (sv == NULL)
344 exit(5);
345
346 ctx->set_sampler_views(ctx, PIPE_SHADER_FRAGMENT, 0, 1, 0, false, &sv);
347
348
349 memset(&sampler_desc, 0, sizeof sampler_desc);
350 sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
351 sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
352 sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
353 sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
354 sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
355 sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
356 sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
357 sampler_desc.compare_func = 0;
358 sampler_desc.normalized_coords = 1;
359 sampler_desc.max_anisotropy = 0;
360
361 sampler = ctx->create_sampler_state(ctx, &sampler_desc);
362 if (sampler == NULL)
363 exit(6);
364
365 ctx->bind_sampler_states(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sampler);
366
367 }
368
init(void)369 static void init( void )
370 {
371 struct pipe_framebuffer_state fb;
372 struct pipe_resource templat;
373 struct pipe_surface surf_tmpl;
374 int i;
375
376 /* It's hard to say whether window or screen should be created
377 * first. Different environments would prefer one or the other.
378 *
379 * Also, no easy way of querying supported formats if the screen
380 * cannot be created first.
381 */
382 for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
383 screen = graw_create_window_and_screen(0, 0, 300, 300,
384 formats[i],
385 &window);
386 if (window && screen)
387 break;
388 }
389 if (!screen || !window) {
390 fprintf(stderr, "Unable to create window\n");
391 exit(1);
392 }
393
394 ctx = screen->context_create(screen, NULL, 0);
395 if (ctx == NULL)
396 exit(3);
397
398 memset(&templat, 0, sizeof(templat));
399 templat.target = PIPE_TEXTURE_2D;
400 templat.format = formats[i];
401 templat.width0 = WIDTH;
402 templat.height0 = HEIGHT;
403 templat.depth0 = 1;
404 templat.array_size = 1;
405 templat.last_level = 0;
406 templat.bind = (PIPE_BIND_RENDER_TARGET |
407 PIPE_BIND_DISPLAY_TARGET);
408
409 rttex = screen->resource_create(screen,
410 &templat);
411 if (rttex == NULL)
412 exit(4);
413
414 surf_tmpl.format = templat.format;
415 surf_tmpl.u.tex.level = 0;
416 surf_tmpl.u.tex.first_layer = 0;
417 surf_tmpl.u.tex.last_layer = 0;
418 surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
419 if (surf == NULL)
420 exit(5);
421
422 memset(&fb, 0, sizeof fb);
423 fb.nr_cbufs = 1;
424 fb.width = WIDTH;
425 fb.height = HEIGHT;
426 fb.cbufs[0] = surf;
427
428 ctx->set_framebuffer_state(ctx, &fb);
429
430 {
431 struct pipe_blend_state blend;
432 void *handle;
433 memset(&blend, 0, sizeof blend);
434 blend.rt[0].colormask = PIPE_MASK_RGBA;
435 handle = ctx->create_blend_state(ctx, &blend);
436 ctx->bind_blend_state(ctx, handle);
437 }
438
439 {
440 struct pipe_depth_stencil_alpha_state depthstencil;
441 void *handle;
442 memset(&depthstencil, 0, sizeof depthstencil);
443 handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
444 ctx->bind_depth_stencil_alpha_state(ctx, handle);
445 }
446
447 {
448 struct pipe_rasterizer_state rasterizer;
449 void *handle;
450 memset(&rasterizer, 0, sizeof rasterizer);
451 rasterizer.cull_face = PIPE_FACE_NONE;
452 rasterizer.point_size = 8.0;
453 rasterizer.half_pixel_center = 1;
454 rasterizer.bottom_edge_rule = 1;
455 rasterizer.depth_clip_near = 1;
456 rasterizer.depth_clip_far = 1;
457 handle = ctx->create_rasterizer_state(ctx, &rasterizer);
458 ctx->bind_rasterizer_state(ctx, handle);
459 }
460
461 set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
462
463 init_tex();
464 init_fs_constbuf();
465
466 set_vertices();
467 set_vertex_shader();
468 set_fragment_shader();
469 }
470
args(int argc,char * argv[])471 static void args(int argc, char *argv[])
472 {
473 int i;
474
475 for (i = 1; i < argc;) {
476 if (graw_parse_args(&i, argc, argv)) {
477 continue;
478 }
479 if (strcmp(argv[i], "-fps") == 0) {
480 show_fps = 1;
481 i++;
482 }
483 else if (i == argc - 1) {
484 filename = argv[i];
485 i++;
486 }
487 else {
488 usage(argv[0]);
489 exit(1);
490 }
491 }
492
493 if (!filename) {
494 usage(argv[0]);
495 exit(1);
496 }
497 }
498
main(int argc,char * argv[])499 int main( int argc, char *argv[] )
500 {
501 args(argc,argv);
502 init();
503
504 graw_set_display_func( draw );
505 graw_main_loop();
506 return 0;
507 }
508