vs-test.c revision 3464ebd5 
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
19static const char *filename = NULL;
20unsigned show_fps = 0;
21
22
23static 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
34enum pipe_format formats[] = {
35   PIPE_FORMAT_R8G8B8A8_UNORM,
36   PIPE_FORMAT_B8G8R8A8_UNORM,
37   PIPE_FORMAT_NONE
38};
39
40static const int WIDTH = 250;
41static const int HEIGHT = 250;
42
43static struct pipe_screen *screen = NULL;
44static struct pipe_context *ctx = NULL;
45static struct pipe_resource *rttex = NULL;
46static struct pipe_resource *constbuf = NULL;
47static struct pipe_surface *surf = NULL;
48static struct pipe_sampler_view *sv = NULL;
49static void *sampler = NULL;
50static void *window = NULL;
51static struct pipe_resource *samptex = NULL;
52
53struct vertex {
54   float position[4];
55   float color[3];
56};
57
58/* Draw a regular mesh
59 */
60#define MESH_SZ 16
61static struct vertex vertices[MESH_SZ * MESH_SZ];
62
63static 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
80static 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   ctx->set_constant_buffer(ctx,
114                            PIPE_SHADER_FRAGMENT, 0,
115                            constbuf);
116}
117
118
119static 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
142static 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 = screen->user_buffer_create(screen,
176                                            vertices,
177                                            sizeof(vertices),
178                                            PIPE_BIND_VERTEX_BUFFER);
179
180   ctx->set_vertex_buffers(ctx, 1, &vbuf);
181}
182
183static 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
208static 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
224static void draw( void )
225{
226   float clear_color[4] = {.1,.3,.5,0};
227
228   ctx->clear(ctx, PIPE_CLEAR_COLOR, clear_color, 0, 0);
229   util_draw_arrays(ctx, PIPE_PRIM_POINTS, 0, Elements(vertices));
230   ctx->flush(ctx, NULL);
231
232   graw_save_surface_to_file(ctx, surf, NULL);
233
234   screen->flush_frontbuffer(screen, rttex, 0, 0, window);
235}
236
237#define SIZE 16
238
239static 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   templat.target = PIPE_TEXTURE_2D;
290   templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
291   templat.width0 = SIZE;
292   templat.height0 = SIZE;
293   templat.depth0 = 1;
294   templat.array_size = 1;
295   templat.last_level = 0;
296   templat.nr_samples = 1;
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->transfer_inline_write(ctx,
308                              samptex,
309                              0,
310                              PIPE_TRANSFER_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      t = pipe_get_transfer(ctx, samptex,
323                            0, 0, /* level, layer */
324                            PIPE_TRANSFER_READ,
325                            0, 0, SIZE, SIZE); /* x, y, width, height */
326
327      ptr = ctx->transfer_map(ctx, t);
328
329      if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
330         assert(0);
331         exit(9);
332      }
333
334      ctx->transfer_unmap(ctx, t);
335
336      ctx->transfer_destroy(ctx, t);
337   }
338
339   memset(&sv_template, 0, sizeof sv_template);
340   sv_template.format = samptex->format;
341   sv_template.texture = samptex;
342   sv_template.swizzle_r = 0;
343   sv_template.swizzle_g = 1;
344   sv_template.swizzle_b = 2;
345   sv_template.swizzle_a = 3;
346   sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
347   if (sv == NULL)
348      exit(5);
349
350   ctx->set_fragment_sampler_views(ctx, 1, &sv);
351
352
353   memset(&sampler_desc, 0, sizeof sampler_desc);
354   sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
355   sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
356   sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
357   sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
358   sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
359   sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
360   sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
361   sampler_desc.compare_func = 0;
362   sampler_desc.normalized_coords = 1;
363   sampler_desc.max_anisotropy = 0;
364
365   sampler = ctx->create_sampler_state(ctx, &sampler_desc);
366   if (sampler == NULL)
367      exit(6);
368
369   ctx->bind_fragment_sampler_states(ctx, 1, &sampler);
370
371}
372
373static void init( void )
374{
375   struct pipe_framebuffer_state fb;
376   struct pipe_resource templat;
377   struct pipe_surface surf_tmpl;
378   int i;
379
380   /* It's hard to say whether window or screen should be created
381    * first.  Different environments would prefer one or the other.
382    *
383    * Also, no easy way of querying supported formats if the screen
384    * cannot be created first.
385    */
386   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
387      screen = graw_create_window_and_screen(0, 0, 300, 300,
388                                             formats[i],
389                                             &window);
390      if (window && screen)
391         break;
392   }
393   if (!screen || !window) {
394      fprintf(stderr, "Unable to create window\n");
395      exit(1);
396   }
397
398   ctx = screen->context_create(screen, NULL);
399   if (ctx == NULL)
400      exit(3);
401
402   templat.target = PIPE_TEXTURE_2D;
403   templat.format = formats[i];
404   templat.width0 = WIDTH;
405   templat.height0 = HEIGHT;
406   templat.depth0 = 1;
407   templat.array_size = 1;
408   templat.last_level = 0;
409   templat.nr_samples = 1;
410   templat.bind = (PIPE_BIND_RENDER_TARGET |
411                   PIPE_BIND_DISPLAY_TARGET);
412
413   rttex = screen->resource_create(screen,
414                                 &templat);
415   if (rttex == NULL)
416      exit(4);
417
418   surf_tmpl.format = templat.format;
419   surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
420   surf_tmpl.u.tex.level = 0;
421   surf_tmpl.u.tex.first_layer = 0;
422   surf_tmpl.u.tex.last_layer = 0;
423   surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
424   if (surf == NULL)
425      exit(5);
426
427   memset(&fb, 0, sizeof fb);
428   fb.nr_cbufs = 1;
429   fb.width = WIDTH;
430   fb.height = HEIGHT;
431   fb.cbufs[0] = surf;
432
433   ctx->set_framebuffer_state(ctx, &fb);
434
435   {
436      struct pipe_blend_state blend;
437      void *handle;
438      memset(&blend, 0, sizeof blend);
439      blend.rt[0].colormask = PIPE_MASK_RGBA;
440      handle = ctx->create_blend_state(ctx, &blend);
441      ctx->bind_blend_state(ctx, handle);
442   }
443
444   {
445      struct pipe_depth_stencil_alpha_state depthstencil;
446      void *handle;
447      memset(&depthstencil, 0, sizeof depthstencil);
448      handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
449      ctx->bind_depth_stencil_alpha_state(ctx, handle);
450   }
451
452   {
453      struct pipe_rasterizer_state rasterizer;
454      void *handle;
455      memset(&rasterizer, 0, sizeof rasterizer);
456      rasterizer.cull_face = PIPE_FACE_NONE;
457      rasterizer.point_size = 8.0;
458      rasterizer.gl_rasterization_rules = 1;
459      handle = ctx->create_rasterizer_state(ctx, &rasterizer);
460      ctx->bind_rasterizer_state(ctx, handle);
461   }
462
463   set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
464
465   init_tex();
466   init_fs_constbuf();
467
468   set_vertices();
469   set_vertex_shader();
470   set_fragment_shader();
471}
472
473static void args(int argc, char *argv[])
474{
475   int i;
476
477   for (i = 1; i < argc;) {
478      if (graw_parse_args(&i, argc, argv)) {
479         continue;
480      }
481      if (strcmp(argv[i], "-fps") == 0) {
482         show_fps = 1;
483         i++;
484      }
485      else if (i == argc - 1) {
486         filename = argv[i];
487         i++;
488      }
489      else {
490         usage(argv[0]);
491         exit(1);
492      }
493   }
494
495   if (!filename) {
496      usage(argv[0]);
497      exit(1);
498   }
499}
500
501int main( int argc, char *argv[] )
502{
503   args(argc,argv);
504   init();
505
506   graw_set_display_func( draw );
507   graw_main_loop();
508   return 0;
509}
510