vs-test.c revision af69d88d 
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_RGBA8888_UNORM,
36   PIPE_FORMAT_BGRA8888_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   pipe_set_constant_buffer(ctx,
114                            PIPE_SHADER_VERTEX, 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_states( ctx, 0, 1, &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   memset(&vbuf, 0, sizeof vbuf);
174
175   vbuf.stride = sizeof( struct vertex );
176   vbuf.buffer_offset = 0;
177   vbuf.buffer = pipe_buffer_create_with_data(ctx,
178                                              PIPE_BIND_VERTEX_BUFFER,
179                                              PIPE_USAGE_DEFAULT,
180                                              sizeof(vertices),
181                                              vertices);
182
183   ctx->set_vertex_buffers(ctx, 0, 1, &vbuf);
184}
185
186static void set_vertex_shader( void )
187{
188   FILE *f;
189   char buf[50000];
190   void *handle;
191   int sz;
192
193   if ((f = fopen(filename, "r")) == NULL) {
194      fprintf(stderr, "Couldn't open %s\n", filename);
195      exit(1);
196   }
197
198   sz = fread(buf, 1, sizeof(buf), f);
199   if (!feof(f)) {
200      printf("file too long\n");
201      exit(1);
202   }
203   printf("%.*s\n", sz, buf);
204   buf[sz] = 0;
205
206   handle = graw_parse_vertex_shader(ctx, buf);
207   ctx->bind_vs_state(ctx, handle);
208   fclose(f);
209}
210
211static void set_fragment_shader( void )
212{
213   void *handle;
214   const char *text =
215      "FRAG\n"
216      "DCL IN[0], COLOR, LINEAR\n"
217      "DCL OUT[0], COLOR\n"
218      "  0: MOV OUT[0], IN[0]\n"
219      "  1: END\n";
220
221   handle = graw_parse_fragment_shader(ctx, text);
222   ctx->bind_fs_state(ctx, handle);
223}
224
225
226
227static void draw( void )
228{
229   union pipe_color_union clear_color = { {.1,.3,.5,0} };
230
231   ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
232   util_draw_arrays(ctx, PIPE_PRIM_POINTS, 0, Elements(vertices));
233   ctx->flush(ctx, NULL, 0);
234
235   graw_save_surface_to_file(ctx, surf, NULL);
236
237   screen->flush_frontbuffer(screen, rttex, 0, 0, window, NULL);
238}
239
240#define SIZE 16
241
242static void init_tex( void )
243{
244   struct pipe_sampler_view sv_template;
245   struct pipe_sampler_state sampler_desc;
246   struct pipe_resource templat;
247   struct pipe_box box;
248   ubyte tex2d[SIZE][SIZE][4];
249   int s, t;
250
251#if (SIZE != 2)
252   for (s = 0; s < SIZE; s++) {
253      for (t = 0; t < SIZE; t++) {
254         if (0) {
255            int x = (s ^ t) & 1;
256	    tex2d[t][s][0] = (x) ? 0 : 63;
257	    tex2d[t][s][1] = (x) ? 0 : 128;
258	    tex2d[t][s][2] = 0;
259	    tex2d[t][s][3] = 0xff;
260         }
261         else {
262            int x = ((s ^ t) >> 2) & 1;
263	    tex2d[t][s][0] = s*255/(SIZE-1);
264	    tex2d[t][s][1] = t*255/(SIZE-1);
265	    tex2d[t][s][2] = (x) ? 0 : 128;
266	    tex2d[t][s][3] = 0xff;
267         }
268      }
269   }
270#else
271   tex2d[0][0][0] = 0;
272   tex2d[0][0][1] = 255;
273   tex2d[0][0][2] = 255;
274   tex2d[0][0][3] = 0;
275
276   tex2d[0][1][0] = 0;
277   tex2d[0][1][1] = 0;
278   tex2d[0][1][2] = 255;
279   tex2d[0][1][3] = 255;
280
281   tex2d[1][0][0] = 255;
282   tex2d[1][0][1] = 255;
283   tex2d[1][0][2] = 0;
284   tex2d[1][0][3] = 255;
285
286   tex2d[1][1][0] = 255;
287   tex2d[1][1][1] = 0;
288   tex2d[1][1][2] = 0;
289   tex2d[1][1][3] = 255;
290#endif
291
292   templat.target = PIPE_TEXTURE_2D;
293   templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
294   templat.width0 = SIZE;
295   templat.height0 = SIZE;
296   templat.depth0 = 1;
297   templat.array_size = 1;
298   templat.last_level = 0;
299   templat.nr_samples = 1;
300   templat.bind = PIPE_BIND_SAMPLER_VIEW;
301
302
303   samptex = screen->resource_create(screen,
304                                 &templat);
305   if (samptex == NULL)
306      exit(4);
307
308   u_box_2d(0,0,SIZE,SIZE, &box);
309
310   ctx->transfer_inline_write(ctx,
311                              samptex,
312                              0,
313                              PIPE_TRANSFER_WRITE,
314                              &box,
315                              tex2d,
316                              sizeof tex2d[0],
317                              sizeof tex2d);
318
319   /* Possibly read back & compare against original data:
320    */
321   if (0)
322   {
323      struct pipe_transfer *t;
324      uint32_t *ptr;
325      ptr = pipe_transfer_map(ctx, samptex,
326                              0, 0, /* level, layer */
327                              PIPE_TRANSFER_READ,
328                              0, 0, SIZE, SIZE, &t); /* x, y, width, height */
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
338   memset(&sv_template, 0, sizeof sv_template);
339   sv_template.format = samptex->format;
340   sv_template.texture = samptex;
341   sv_template.swizzle_r = 0;
342   sv_template.swizzle_g = 1;
343   sv_template.swizzle_b = 2;
344   sv_template.swizzle_a = 3;
345   sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
346   if (sv == NULL)
347      exit(5);
348
349   ctx->set_sampler_views(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv);
350
351
352   memset(&sampler_desc, 0, sizeof sampler_desc);
353   sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
354   sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
355   sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
356   sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
357   sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
358   sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
359   sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
360   sampler_desc.compare_func = 0;
361   sampler_desc.normalized_coords = 1;
362   sampler_desc.max_anisotropy = 0;
363
364   sampler = ctx->create_sampler_state(ctx, &sampler_desc);
365   if (sampler == NULL)
366      exit(6);
367
368   ctx->bind_sampler_states(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sampler);
369
370}
371
372static void init( void )
373{
374   struct pipe_framebuffer_state fb;
375   struct pipe_resource templat;
376   struct pipe_surface surf_tmpl;
377   int i;
378
379   /* It's hard to say whether window or screen should be created
380    * first.  Different environments would prefer one or the other.
381    *
382    * Also, no easy way of querying supported formats if the screen
383    * cannot be created first.
384    */
385   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
386      screen = graw_create_window_and_screen(0, 0, 300, 300,
387                                             formats[i],
388                                             &window);
389      if (window && screen)
390         break;
391   }
392   if (!screen || !window) {
393      fprintf(stderr, "Unable to create window\n");
394      exit(1);
395   }
396
397   ctx = screen->context_create(screen, NULL);
398   if (ctx == NULL)
399      exit(3);
400
401   templat.target = PIPE_TEXTURE_2D;
402   templat.format = formats[i];
403   templat.width0 = WIDTH;
404   templat.height0 = HEIGHT;
405   templat.depth0 = 1;
406   templat.array_size = 1;
407   templat.last_level = 0;
408   templat.nr_samples = 1;
409   templat.bind = (PIPE_BIND_RENDER_TARGET |
410                   PIPE_BIND_DISPLAY_TARGET);
411
412   rttex = screen->resource_create(screen,
413                                 &templat);
414   if (rttex == NULL)
415      exit(4);
416
417   surf_tmpl.format = templat.format;
418   surf_tmpl.u.tex.level = 0;
419   surf_tmpl.u.tex.first_layer = 0;
420   surf_tmpl.u.tex.last_layer = 0;
421   surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
422   if (surf == NULL)
423      exit(5);
424
425   memset(&fb, 0, sizeof fb);
426   fb.nr_cbufs = 1;
427   fb.width = WIDTH;
428   fb.height = HEIGHT;
429   fb.cbufs[0] = surf;
430
431   ctx->set_framebuffer_state(ctx, &fb);
432
433   {
434      struct pipe_blend_state blend;
435      void *handle;
436      memset(&blend, 0, sizeof blend);
437      blend.rt[0].colormask = PIPE_MASK_RGBA;
438      handle = ctx->create_blend_state(ctx, &blend);
439      ctx->bind_blend_state(ctx, handle);
440   }
441
442   {
443      struct pipe_depth_stencil_alpha_state depthstencil;
444      void *handle;
445      memset(&depthstencil, 0, sizeof depthstencil);
446      handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
447      ctx->bind_depth_stencil_alpha_state(ctx, handle);
448   }
449
450   {
451      struct pipe_rasterizer_state rasterizer;
452      void *handle;
453      memset(&rasterizer, 0, sizeof rasterizer);
454      rasterizer.cull_face = PIPE_FACE_NONE;
455      rasterizer.point_size = 8.0;
456      rasterizer.half_pixel_center = 1;
457      rasterizer.bottom_edge_rule = 1;
458      rasterizer.depth_clip = 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