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 "state_tracker/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_R8G8B8A8_UNORM,
36 PIPE_FORMAT_B8G8R8A8_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 templat.target = PIPE_BUFFER;
86 templat.format = PIPE_FORMAT_R8_UNORM;
87 templat.width0 = sizeof(constants);
88 templat.height0 = 1;
89 templat.depth0 = 1;
90 templat.array_size = 1;
91 templat.last_level = 0;
92 templat.nr_samples = 1;
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->transfer_inline_write(ctx,
104 constbuf,
105 0,
106 PIPE_TRANSFER_WRITE,
107 &box,
108 constants,
109 sizeof constants,
110 sizeof constants);
111
112
113 pipe_set_constant_buffer(ctx,
114 PIPE_SHADER_FRAGMENT, 0,
115 constbuf);
116 }
117
118
set_viewport(float x,float y,float width,float height,float near,float far)119 static void set_viewport( float x, float y,
120 float width, float height,
121 float near, float far)
122 {
123 float z = far;
124 float half_width = (float)width / 2.0f;
125 float half_height = (float)height / 2.0f;
126 float half_depth = ((float)far - (float)near) / 2.0f;
127 struct pipe_viewport_state vp;
128
129 vp.scale[0] = half_width;
130 vp.scale[1] = half_height;
131 vp.scale[2] = half_depth;
132 vp.scale[3] = 1.0f;
133
134 vp.translate[0] = half_width + x;
135 vp.translate[1] = half_height + y;
136 vp.translate[2] = half_depth + z;
137 vp.translate[3] = 0.0f;
138
139 ctx->set_viewport_state( ctx, &vp );
140 }
141
set_vertices(void)142 static void set_vertices( void )
143 {
144 struct pipe_vertex_element ve[2];
145 struct pipe_vertex_buffer vbuf;
146 void *handle;
147 int x,y;
148
149 memset(ve, 0, sizeof ve);
150
151 ve[0].src_offset = Offset(struct vertex, position);
152 ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
153 ve[1].src_offset = Offset(struct vertex, color);
154 ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
155
156 handle = ctx->create_vertex_elements_state(ctx, 2, ve);
157 ctx->bind_vertex_elements_state(ctx, handle);
158
159 for (x = 0; x < MESH_SZ; x++) {
160 for (y = 0; y < MESH_SZ; y++) {
161 int i = y * MESH_SZ + x;
162 vertices[i].position[0] = ((float)x)/MESH_SZ * 2.0 - 1.0;
163 vertices[i].position[1] = ((float)y)/MESH_SZ * 2.0 - 1.0;
164 vertices[i].position[2] = 0;
165 vertices[i].position[3] = 1.0;
166
167 vertices[i].color[0] = .5;
168 vertices[i].color[1] = (float)x / (float)MESH_SZ;
169 vertices[i].color[2] = (float)y / (float)MESH_SZ;
170 }
171 }
172
173 vbuf.stride = sizeof( struct vertex );
174 vbuf.buffer_offset = 0;
175 vbuf.buffer = pipe_buffer_create_with_data(ctx,
176 PIPE_BIND_VERTEX_BUFFER,
177 PIPE_USAGE_STATIC,
178 sizeof(vertices),
179 vertices);
180
181 ctx->set_vertex_buffers(ctx, 1, &vbuf);
182 }
183
set_vertex_shader(void)184 static void set_vertex_shader( void )
185 {
186 FILE *f;
187 char buf[50000];
188 void *handle;
189 int sz;
190
191 if ((f = fopen(filename, "r")) == NULL) {
192 fprintf(stderr, "Couldn't open %s\n", filename);
193 exit(1);
194 }
195
196 sz = fread(buf, 1, sizeof(buf), f);
197 if (!feof(f)) {
198 printf("file too long\n");
199 exit(1);
200 }
201 printf("%.*s\n", sz, buf);
202 buf[sz] = 0;
203
204 handle = graw_parse_vertex_shader(ctx, buf);
205 ctx->bind_vs_state(ctx, handle);
206 fclose(f);
207 }
208
set_fragment_shader(void)209 static void set_fragment_shader( void )
210 {
211 void *handle;
212 const char *text =
213 "FRAG\n"
214 "DCL IN[0], COLOR, LINEAR\n"
215 "DCL OUT[0], COLOR\n"
216 " 0: MOV OUT[0], IN[0]\n"
217 " 1: END\n";
218
219 handle = graw_parse_fragment_shader(ctx, text);
220 ctx->bind_fs_state(ctx, handle);
221 }
222
223
224
draw(void)225 static void draw( void )
226 {
227 union pipe_color_union clear_color = { {.1,.3,.5,0} };
228
229 ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
230 util_draw_arrays(ctx, PIPE_PRIM_POINTS, 0, Elements(vertices));
231 ctx->flush(ctx, NULL);
232
233 graw_save_surface_to_file(ctx, surf, NULL);
234
235 screen->flush_frontbuffer(screen, rttex, 0, 0, window);
236 }
237
238 #define SIZE 16
239
init_tex(void)240 static void init_tex( void )
241 {
242 struct pipe_sampler_view sv_template;
243 struct pipe_sampler_state sampler_desc;
244 struct pipe_resource templat;
245 struct pipe_box box;
246 ubyte tex2d[SIZE][SIZE][4];
247 int s, t;
248
249 #if (SIZE != 2)
250 for (s = 0; s < SIZE; s++) {
251 for (t = 0; t < SIZE; t++) {
252 if (0) {
253 int x = (s ^ t) & 1;
254 tex2d[t][s][0] = (x) ? 0 : 63;
255 tex2d[t][s][1] = (x) ? 0 : 128;
256 tex2d[t][s][2] = 0;
257 tex2d[t][s][3] = 0xff;
258 }
259 else {
260 int x = ((s ^ t) >> 2) & 1;
261 tex2d[t][s][0] = s*255/(SIZE-1);
262 tex2d[t][s][1] = t*255/(SIZE-1);
263 tex2d[t][s][2] = (x) ? 0 : 128;
264 tex2d[t][s][3] = 0xff;
265 }
266 }
267 }
268 #else
269 tex2d[0][0][0] = 0;
270 tex2d[0][0][1] = 255;
271 tex2d[0][0][2] = 255;
272 tex2d[0][0][3] = 0;
273
274 tex2d[0][1][0] = 0;
275 tex2d[0][1][1] = 0;
276 tex2d[0][1][2] = 255;
277 tex2d[0][1][3] = 255;
278
279 tex2d[1][0][0] = 255;
280 tex2d[1][0][1] = 255;
281 tex2d[1][0][2] = 0;
282 tex2d[1][0][3] = 255;
283
284 tex2d[1][1][0] = 255;
285 tex2d[1][1][1] = 0;
286 tex2d[1][1][2] = 0;
287 tex2d[1][1][3] = 255;
288 #endif
289
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.nr_samples = 1;
298 templat.bind = PIPE_BIND_SAMPLER_VIEW;
299
300
301 samptex = screen->resource_create(screen,
302 &templat);
303 if (samptex == NULL)
304 exit(4);
305
306 u_box_2d(0,0,SIZE,SIZE, &box);
307
308 ctx->transfer_inline_write(ctx,
309 samptex,
310 0,
311 PIPE_TRANSFER_WRITE,
312 &box,
313 tex2d,
314 sizeof tex2d[0],
315 sizeof tex2d);
316
317 /* Possibly read back & compare against original data:
318 */
319 if (0)
320 {
321 struct pipe_transfer *t;
322 uint32_t *ptr;
323 t = pipe_get_transfer(ctx, samptex,
324 0, 0, /* level, layer */
325 PIPE_TRANSFER_READ,
326 0, 0, SIZE, SIZE); /* x, y, width, height */
327
328 ptr = ctx->transfer_map(ctx, t);
329
330 if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
331 assert(0);
332 exit(9);
333 }
334
335 ctx->transfer_unmap(ctx, t);
336
337 ctx->transfer_destroy(ctx, t);
338 }
339
340 memset(&sv_template, 0, sizeof sv_template);
341 sv_template.format = samptex->format;
342 sv_template.texture = samptex;
343 sv_template.swizzle_r = 0;
344 sv_template.swizzle_g = 1;
345 sv_template.swizzle_b = 2;
346 sv_template.swizzle_a = 3;
347 sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
348 if (sv == NULL)
349 exit(5);
350
351 ctx->set_fragment_sampler_views(ctx, 1, &sv);
352
353
354 memset(&sampler_desc, 0, sizeof sampler_desc);
355 sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
356 sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
357 sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
358 sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
359 sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
360 sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
361 sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
362 sampler_desc.compare_func = 0;
363 sampler_desc.normalized_coords = 1;
364 sampler_desc.max_anisotropy = 0;
365
366 sampler = ctx->create_sampler_state(ctx, &sampler_desc);
367 if (sampler == NULL)
368 exit(6);
369
370 ctx->bind_fragment_sampler_states(ctx, 1, &sampler);
371
372 }
373
init(void)374 static void init( void )
375 {
376 struct pipe_framebuffer_state fb;
377 struct pipe_resource templat;
378 struct pipe_surface surf_tmpl;
379 int i;
380
381 /* It's hard to say whether window or screen should be created
382 * first. Different environments would prefer one or the other.
383 *
384 * Also, no easy way of querying supported formats if the screen
385 * cannot be created first.
386 */
387 for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
388 screen = graw_create_window_and_screen(0, 0, 300, 300,
389 formats[i],
390 &window);
391 if (window && screen)
392 break;
393 }
394 if (!screen || !window) {
395 fprintf(stderr, "Unable to create window\n");
396 exit(1);
397 }
398
399 ctx = screen->context_create(screen, NULL);
400 if (ctx == NULL)
401 exit(3);
402
403 templat.target = PIPE_TEXTURE_2D;
404 templat.format = formats[i];
405 templat.width0 = WIDTH;
406 templat.height0 = HEIGHT;
407 templat.depth0 = 1;
408 templat.array_size = 1;
409 templat.last_level = 0;
410 templat.nr_samples = 1;
411 templat.bind = (PIPE_BIND_RENDER_TARGET |
412 PIPE_BIND_DISPLAY_TARGET);
413
414 rttex = screen->resource_create(screen,
415 &templat);
416 if (rttex == NULL)
417 exit(4);
418
419 surf_tmpl.format = templat.format;
420 surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
421 surf_tmpl.u.tex.level = 0;
422 surf_tmpl.u.tex.first_layer = 0;
423 surf_tmpl.u.tex.last_layer = 0;
424 surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
425 if (surf == NULL)
426 exit(5);
427
428 memset(&fb, 0, sizeof fb);
429 fb.nr_cbufs = 1;
430 fb.width = WIDTH;
431 fb.height = HEIGHT;
432 fb.cbufs[0] = surf;
433
434 ctx->set_framebuffer_state(ctx, &fb);
435
436 {
437 struct pipe_blend_state blend;
438 void *handle;
439 memset(&blend, 0, sizeof blend);
440 blend.rt[0].colormask = PIPE_MASK_RGBA;
441 handle = ctx->create_blend_state(ctx, &blend);
442 ctx->bind_blend_state(ctx, handle);
443 }
444
445 {
446 struct pipe_depth_stencil_alpha_state depthstencil;
447 void *handle;
448 memset(&depthstencil, 0, sizeof depthstencil);
449 handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
450 ctx->bind_depth_stencil_alpha_state(ctx, handle);
451 }
452
453 {
454 struct pipe_rasterizer_state rasterizer;
455 void *handle;
456 memset(&rasterizer, 0, sizeof rasterizer);
457 rasterizer.cull_face = PIPE_FACE_NONE;
458 rasterizer.point_size = 8.0;
459 rasterizer.gl_rasterization_rules = 1;
460 rasterizer.depth_clip = 1;
461 handle = ctx->create_rasterizer_state(ctx, &rasterizer);
462 ctx->bind_rasterizer_state(ctx, handle);
463 }
464
465 set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
466
467 init_tex();
468 init_fs_constbuf();
469
470 set_vertices();
471 set_vertex_shader();
472 set_fragment_shader();
473 }
474
args(int argc,char * argv[])475 static void args(int argc, char *argv[])
476 {
477 int i;
478
479 for (i = 1; i < argc;) {
480 if (graw_parse_args(&i, argc, argv)) {
481 continue;
482 }
483 if (strcmp(argv[i], "-fps") == 0) {
484 show_fps = 1;
485 i++;
486 }
487 else if (i == argc - 1) {
488 filename = argv[i];
489 i++;
490 }
491 else {
492 usage(argv[0]);
493 exit(1);
494 }
495 }
496
497 if (!filename) {
498 usage(argv[0]);
499 exit(1);
500 }
501 }
502
main(int argc,char * argv[])503 int main( int argc, char *argv[] )
504 {
505 args(argc,argv);
506 init();
507
508 graw_set_display_func( draw );
509 graw_main_loop();
510 return 0;
511 }
512