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 ctx->set_viewport_states( ctx, 0, 1, &vp );
132 }
133
set_vertices(void)134 static void set_vertices( void )
135 {
136 struct pipe_vertex_element ve[2];
137 struct pipe_vertex_buffer vbuf;
138 void *handle;
139 int x,y;
140
141 memset(ve, 0, sizeof ve);
142
143 ve[0].src_offset = Offset(struct vertex, position);
144 ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
145 ve[1].src_offset = Offset(struct vertex, color);
146 ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
147
148 handle = ctx->create_vertex_elements_state(ctx, 2, ve);
149 ctx->bind_vertex_elements_state(ctx, handle);
150
151 for (x = 0; x < MESH_SZ; x++) {
152 for (y = 0; y < MESH_SZ; y++) {
153 int i = y * MESH_SZ + x;
154 vertices[i].position[0] = ((float)x)/MESH_SZ * 2.0 - 1.0;
155 vertices[i].position[1] = ((float)y)/MESH_SZ * 2.0 - 1.0;
156 vertices[i].position[2] = 0;
157 vertices[i].position[3] = 1.0;
158
159 vertices[i].color[0] = .5;
160 vertices[i].color[1] = (float)x / (float)MESH_SZ;
161 vertices[i].color[2] = (float)y / (float)MESH_SZ;
162 }
163 }
164
165 memset(&vbuf, 0, sizeof vbuf);
166
167 vbuf.stride = sizeof( struct vertex );
168 vbuf.buffer_offset = 0;
169 vbuf.buffer.resource = pipe_buffer_create_with_data(ctx,
170 PIPE_BIND_VERTEX_BUFFER,
171 PIPE_USAGE_DEFAULT,
172 sizeof(vertices),
173 vertices);
174
175 ctx->set_vertex_buffers(ctx, 0, 1, &vbuf);
176 }
177
set_vertex_shader(void)178 static void set_vertex_shader( void )
179 {
180 FILE *f;
181 char buf[50000];
182 void *handle;
183 int sz;
184
185 if ((f = fopen(filename, "r")) == NULL) {
186 fprintf(stderr, "Couldn't open %s\n", filename);
187 exit(1);
188 }
189
190 sz = fread(buf, 1, sizeof(buf), f);
191 if (!feof(f)) {
192 printf("file too long\n");
193 exit(1);
194 }
195 printf("%.*s\n", sz, buf);
196 buf[sz] = 0;
197
198 handle = graw_parse_vertex_shader(ctx, buf);
199 ctx->bind_vs_state(ctx, handle);
200 fclose(f);
201 }
202
set_fragment_shader(void)203 static void set_fragment_shader( void )
204 {
205 void *handle;
206 const char *text =
207 "FRAG\n"
208 "DCL IN[0], COLOR, LINEAR\n"
209 "DCL OUT[0], COLOR\n"
210 " 0: MOV OUT[0], IN[0]\n"
211 " 1: END\n";
212
213 handle = graw_parse_fragment_shader(ctx, text);
214 ctx->bind_fs_state(ctx, handle);
215 }
216
217
218
draw(void)219 static void draw( void )
220 {
221 union pipe_color_union clear_color = { {.1,.3,.5,0} };
222
223 ctx->clear(ctx, PIPE_CLEAR_COLOR, NULL, &clear_color, 0, 0);
224 util_draw_arrays(ctx, PIPE_PRIM_POINTS, 0, ARRAY_SIZE(vertices));
225 ctx->flush(ctx, NULL, 0);
226
227 graw_save_surface_to_file(ctx, surf, NULL);
228
229 screen->flush_frontbuffer(screen, rttex, 0, 0, window, NULL);
230 }
231
232 #define SIZE 16
233
init_tex(void)234 static void init_tex( void )
235 {
236 struct pipe_sampler_view sv_template;
237 struct pipe_sampler_state sampler_desc;
238 struct pipe_resource templat;
239 struct pipe_box box;
240 ubyte tex2d[SIZE][SIZE][4];
241 int s, t;
242
243 #if (SIZE != 2)
244 for (s = 0; s < SIZE; s++) {
245 for (t = 0; t < SIZE; t++) {
246 if (0) {
247 int x = (s ^ t) & 1;
248 tex2d[t][s][0] = (x) ? 0 : 63;
249 tex2d[t][s][1] = (x) ? 0 : 128;
250 tex2d[t][s][2] = 0;
251 tex2d[t][s][3] = 0xff;
252 }
253 else {
254 int x = ((s ^ t) >> 2) & 1;
255 tex2d[t][s][0] = s*255/(SIZE-1);
256 tex2d[t][s][1] = t*255/(SIZE-1);
257 tex2d[t][s][2] = (x) ? 0 : 128;
258 tex2d[t][s][3] = 0xff;
259 }
260 }
261 }
262 #else
263 tex2d[0][0][0] = 0;
264 tex2d[0][0][1] = 255;
265 tex2d[0][0][2] = 255;
266 tex2d[0][0][3] = 0;
267
268 tex2d[0][1][0] = 0;
269 tex2d[0][1][1] = 0;
270 tex2d[0][1][2] = 255;
271 tex2d[0][1][3] = 255;
272
273 tex2d[1][0][0] = 255;
274 tex2d[1][0][1] = 255;
275 tex2d[1][0][2] = 0;
276 tex2d[1][0][3] = 255;
277
278 tex2d[1][1][0] = 255;
279 tex2d[1][1][1] = 0;
280 tex2d[1][1][2] = 0;
281 tex2d[1][1][3] = 255;
282 #endif
283
284 memset(&templat, 0, sizeof(templat));
285 templat.target = PIPE_TEXTURE_2D;
286 templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
287 templat.width0 = SIZE;
288 templat.height0 = SIZE;
289 templat.depth0 = 1;
290 templat.array_size = 1;
291 templat.last_level = 0;
292 templat.bind = PIPE_BIND_SAMPLER_VIEW;
293
294
295 samptex = screen->resource_create(screen,
296 &templat);
297 if (samptex == NULL)
298 exit(4);
299
300 u_box_2d(0,0,SIZE,SIZE, &box);
301
302 ctx->texture_subdata(ctx,
303 samptex,
304 0,
305 PIPE_MAP_WRITE,
306 &box,
307 tex2d,
308 sizeof tex2d[0],
309 sizeof tex2d);
310
311 /* Possibly read back & compare against original data:
312 */
313 if (0)
314 {
315 struct pipe_transfer *t;
316 uint32_t *ptr;
317 ptr = pipe_transfer_map(ctx, samptex,
318 0, 0, /* level, layer */
319 PIPE_MAP_READ,
320 0, 0, SIZE, SIZE, &t); /* x, y, width, height */
321
322 if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
323 assert(0);
324 exit(9);
325 }
326
327 ctx->transfer_unmap(ctx, t);
328 }
329
330 memset(&sv_template, 0, sizeof sv_template);
331 sv_template.format = samptex->format;
332 sv_template.texture = samptex;
333 sv_template.swizzle_r = 0;
334 sv_template.swizzle_g = 1;
335 sv_template.swizzle_b = 2;
336 sv_template.swizzle_a = 3;
337 sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
338 if (sv == NULL)
339 exit(5);
340
341 ctx->set_sampler_views(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv);
342
343
344 memset(&sampler_desc, 0, sizeof sampler_desc);
345 sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
346 sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
347 sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
348 sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
349 sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
350 sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
351 sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
352 sampler_desc.compare_func = 0;
353 sampler_desc.normalized_coords = 1;
354 sampler_desc.max_anisotropy = 0;
355
356 sampler = ctx->create_sampler_state(ctx, &sampler_desc);
357 if (sampler == NULL)
358 exit(6);
359
360 ctx->bind_sampler_states(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sampler);
361
362 }
363
init(void)364 static void init( void )
365 {
366 struct pipe_framebuffer_state fb;
367 struct pipe_resource templat;
368 struct pipe_surface surf_tmpl;
369 int i;
370
371 /* It's hard to say whether window or screen should be created
372 * first. Different environments would prefer one or the other.
373 *
374 * Also, no easy way of querying supported formats if the screen
375 * cannot be created first.
376 */
377 for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
378 screen = graw_create_window_and_screen(0, 0, 300, 300,
379 formats[i],
380 &window);
381 if (window && screen)
382 break;
383 }
384 if (!screen || !window) {
385 fprintf(stderr, "Unable to create window\n");
386 exit(1);
387 }
388
389 ctx = screen->context_create(screen, NULL, 0);
390 if (ctx == NULL)
391 exit(3);
392
393 memset(&templat, 0, sizeof(templat));
394 templat.target = PIPE_TEXTURE_2D;
395 templat.format = formats[i];
396 templat.width0 = WIDTH;
397 templat.height0 = HEIGHT;
398 templat.depth0 = 1;
399 templat.array_size = 1;
400 templat.last_level = 0;
401 templat.bind = (PIPE_BIND_RENDER_TARGET |
402 PIPE_BIND_DISPLAY_TARGET);
403
404 rttex = screen->resource_create(screen,
405 &templat);
406 if (rttex == NULL)
407 exit(4);
408
409 surf_tmpl.format = templat.format;
410 surf_tmpl.u.tex.level = 0;
411 surf_tmpl.u.tex.first_layer = 0;
412 surf_tmpl.u.tex.last_layer = 0;
413 surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
414 if (surf == NULL)
415 exit(5);
416
417 memset(&fb, 0, sizeof fb);
418 fb.nr_cbufs = 1;
419 fb.width = WIDTH;
420 fb.height = HEIGHT;
421 fb.cbufs[0] = surf;
422
423 ctx->set_framebuffer_state(ctx, &fb);
424
425 {
426 struct pipe_blend_state blend;
427 void *handle;
428 memset(&blend, 0, sizeof blend);
429 blend.rt[0].colormask = PIPE_MASK_RGBA;
430 handle = ctx->create_blend_state(ctx, &blend);
431 ctx->bind_blend_state(ctx, handle);
432 }
433
434 {
435 struct pipe_depth_stencil_alpha_state depthstencil;
436 void *handle;
437 memset(&depthstencil, 0, sizeof depthstencil);
438 handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
439 ctx->bind_depth_stencil_alpha_state(ctx, handle);
440 }
441
442 {
443 struct pipe_rasterizer_state rasterizer;
444 void *handle;
445 memset(&rasterizer, 0, sizeof rasterizer);
446 rasterizer.cull_face = PIPE_FACE_NONE;
447 rasterizer.point_size = 8.0;
448 rasterizer.half_pixel_center = 1;
449 rasterizer.bottom_edge_rule = 1;
450 rasterizer.depth_clip_near = 1;
451 rasterizer.depth_clip_far = 1;
452 handle = ctx->create_rasterizer_state(ctx, &rasterizer);
453 ctx->bind_rasterizer_state(ctx, handle);
454 }
455
456 set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
457
458 init_tex();
459 init_fs_constbuf();
460
461 set_vertices();
462 set_vertex_shader();
463 set_fragment_shader();
464 }
465
args(int argc,char * argv[])466 static void args(int argc, char *argv[])
467 {
468 int i;
469
470 for (i = 1; i < argc;) {
471 if (graw_parse_args(&i, argc, argv)) {
472 continue;
473 }
474 if (strcmp(argv[i], "-fps") == 0) {
475 show_fps = 1;
476 i++;
477 }
478 else if (i == argc - 1) {
479 filename = argv[i];
480 i++;
481 }
482 else {
483 usage(argv[0]);
484 exit(1);
485 }
486 }
487
488 if (!filename) {
489 usage(argv[0]);
490 exit(1);
491 }
492 }
493
main(int argc,char * argv[])494 int main( int argc, char *argv[] )
495 {
496 args(argc,argv);
497 init();
498
499 graw_set_display_func( draw );
500 graw_main_loop();
501 return 0;
502 }
503