quad-sample.c revision 848b8605 
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 "util/u_debug.h"       /* debug_dump_surface_bmp() */
13#include "util/u_inlines.h"
14#include "util/u_memory.h"      /* Offset() */
15#include "util/u_draw_quad.h"
16#include "util/u_box.h"
17
18#include <stdio.h>
19
20enum pipe_format formats[] = {
21   PIPE_FORMAT_RGBA8888_UNORM,
22   PIPE_FORMAT_BGRA8888_UNORM,
23   PIPE_FORMAT_NONE
24};
25
26static const int WIDTH = 300;
27static const int HEIGHT = 300;
28
29static struct pipe_screen *screen = NULL;
30static struct pipe_context *ctx = NULL;
31static struct pipe_resource *rttex = NULL;
32static struct pipe_resource *samptex = NULL;
33static struct pipe_surface *surf = NULL;
34static struct pipe_sampler_view *sv = NULL;
35static void *sampler = NULL;
36static void *window = NULL;
37
38struct vertex {
39   float position[4];
40   float color[4];
41};
42
43static struct vertex vertices[] =
44{
45   { { 0.9, -0.9, 0.0, 1.0 },
46     { 1, 0, 0, 1 } },
47
48   { { 0.9,  0.9, 0.0, 1.0 },
49     { 1, 1, 0, 1 } },
50
51   { {-0.9,  0.9, 0.0, 1.0 },
52     { 0, 1, 0, 1 } },
53
54   { {-0.9,  -0.9, 0.0, 1.0 },
55     { 0, 0, 0, 1 } },
56};
57
58
59
60
61static void set_viewport( float x, float y,
62                          float width, float height,
63                          float near, float far)
64{
65   float z = far;
66   float half_width = (float)width / 2.0f;
67   float half_height = (float)height / 2.0f;
68   float half_depth = ((float)far - (float)near) / 2.0f;
69   struct pipe_viewport_state vp;
70
71   vp.scale[0] = half_width;
72   vp.scale[1] = half_height;
73   vp.scale[2] = half_depth;
74   vp.scale[3] = 1.0f;
75
76   vp.translate[0] = half_width + x;
77   vp.translate[1] = half_height + y;
78   vp.translate[2] = half_depth + z;
79   vp.translate[3] = 0.0f;
80
81   ctx->set_viewport_states( ctx, 0, 1, &vp );
82}
83
84static void set_vertices( void )
85{
86   struct pipe_vertex_element ve[2];
87   struct pipe_vertex_buffer vbuf;
88   void *handle;
89
90   memset(ve, 0, sizeof ve);
91
92   ve[0].src_offset = Offset(struct vertex, position);
93   ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
94   ve[1].src_offset = Offset(struct vertex, color);
95   ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
96
97   handle = ctx->create_vertex_elements_state(ctx, 2, ve);
98   ctx->bind_vertex_elements_state(ctx, handle);
99
100   memset(&vbuf, 0, sizeof vbuf);
101
102   vbuf.stride = sizeof( struct vertex );
103   vbuf.buffer_offset = 0;
104   vbuf.buffer = pipe_buffer_create_with_data(ctx,
105                                              PIPE_BIND_VERTEX_BUFFER,
106                                              PIPE_USAGE_DEFAULT,
107                                              sizeof(vertices),
108                                              vertices);
109
110   ctx->set_vertex_buffers(ctx, 0, 1, &vbuf);
111}
112
113static void set_vertex_shader( void )
114{
115   void *handle;
116   const char *text =
117      "VERT\n"
118      "DCL IN[0]\n"
119      "DCL IN[1]\n"
120      "DCL OUT[0], POSITION\n"
121      "DCL OUT[1], GENERIC[0]\n"
122      "  0: MOV OUT[1], IN[1]\n"
123      "  1: MOV OUT[0], IN[0]\n"
124      "  2: END\n";
125
126   handle = graw_parse_vertex_shader(ctx, text);
127   ctx->bind_vs_state(ctx, handle);
128}
129
130static void set_fragment_shader( void )
131{
132   void *handle;
133   const char *text =
134      "FRAG\n"
135      "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
136      "DCL OUT[0], COLOR\n"
137      "DCL TEMP[0]\n"
138      "DCL SAMP[0]\n"
139      "DCL RES[0], 2D, FLOAT\n"
140      "  0: SAMPLE TEMP[0], IN[0], RES[0], SAMP[0]\n"
141      "  1: MOV OUT[0], TEMP[0]\n"
142      "  2: END\n";
143
144   handle = graw_parse_fragment_shader(ctx, text);
145   ctx->bind_fs_state(ctx, handle);
146}
147
148
149static void draw( void )
150{
151   union pipe_color_union clear_color = { {.5,.5,.5,1} };
152
153   ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
154   util_draw_arrays(ctx, PIPE_PRIM_QUADS, 0, 4);
155   ctx->flush(ctx, NULL, 0);
156
157   graw_save_surface_to_file(ctx, surf, NULL);
158
159   screen->flush_frontbuffer(screen, rttex, 0, 0, window, NULL);
160}
161
162#define SIZE 16
163
164static void init_tex( void )
165{
166   struct pipe_sampler_view sv_template;
167   struct pipe_sampler_state sampler_desc;
168   struct pipe_resource templat;
169   struct pipe_box box;
170   ubyte tex2d[SIZE][SIZE][4];
171   int s, t;
172
173#if (SIZE != 2)
174   for (s = 0; s < SIZE; s++) {
175      for (t = 0; t < SIZE; t++) {
176         if (0) {
177            int x = (s ^ t) & 1;
178	    tex2d[t][s][0] = (x) ? 0 : 63;
179	    tex2d[t][s][1] = (x) ? 0 : 128;
180	    tex2d[t][s][2] = 0;
181	    tex2d[t][s][3] = 0xff;
182         }
183         else {
184            int x = ((s ^ t) >> 2) & 1;
185	    tex2d[t][s][0] = s*255/(SIZE-1);
186	    tex2d[t][s][1] = t*255/(SIZE-1);
187	    tex2d[t][s][2] = (x) ? 0 : 128;
188	    tex2d[t][s][3] = 0xff;
189         }
190      }
191   }
192#else
193   tex2d[0][0][0] = 0;
194   tex2d[0][0][1] = 255;
195   tex2d[0][0][2] = 255;
196   tex2d[0][0][3] = 0;
197
198   tex2d[0][1][0] = 0;
199   tex2d[0][1][1] = 0;
200   tex2d[0][1][2] = 255;
201   tex2d[0][1][3] = 255;
202
203   tex2d[1][0][0] = 255;
204   tex2d[1][0][1] = 255;
205   tex2d[1][0][2] = 0;
206   tex2d[1][0][3] = 255;
207
208   tex2d[1][1][0] = 255;
209   tex2d[1][1][1] = 0;
210   tex2d[1][1][2] = 0;
211   tex2d[1][1][3] = 255;
212#endif
213
214   templat.target = PIPE_TEXTURE_2D;
215   templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
216   templat.width0 = SIZE;
217   templat.height0 = SIZE;
218   templat.depth0 = 1;
219   templat.last_level = 0;
220   templat.nr_samples = 1;
221   templat.bind = PIPE_BIND_SAMPLER_VIEW;
222
223
224   samptex = screen->resource_create(screen,
225                                 &templat);
226   if (samptex == NULL)
227      exit(4);
228
229   u_box_2d(0,0,SIZE,SIZE, &box);
230
231   ctx->transfer_inline_write(ctx,
232                              samptex,
233                              0,
234                              PIPE_TRANSFER_WRITE,
235                              &box,
236                              tex2d,
237                              sizeof tex2d[0],
238                              sizeof tex2d);
239
240   /* Possibly read back & compare against original data:
241    */
242   if (0)
243   {
244      struct pipe_transfer *t;
245      uint32_t *ptr;
246      ptr = pipe_transfer_map(ctx, samptex,
247                              0, 0, /* level, layer */
248                              PIPE_TRANSFER_READ,
249                              0, 0, SIZE, SIZE, &t); /* x, y, width, height */
250
251      if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
252         assert(0);
253         exit(9);
254      }
255
256      ctx->transfer_unmap(ctx, t);
257   }
258
259   memset(&sv_template, 0, sizeof sv_template);
260   sv_template.format = samptex->format;
261   sv_template.texture = samptex;
262   sv_template.swizzle_r = 0;
263   sv_template.swizzle_g = 1;
264   sv_template.swizzle_b = 2;
265   sv_template.swizzle_a = 3;
266   sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
267   if (sv == NULL)
268      exit(5);
269
270   ctx->set_sampler_views(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv);
271
272
273   memset(&sampler_desc, 0, sizeof sampler_desc);
274   sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
275   sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
276   sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
277   sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
278   sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
279   sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
280   sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
281   sampler_desc.compare_func = 0;
282   sampler_desc.normalized_coords = 1;
283   sampler_desc.max_anisotropy = 0;
284
285   sampler = ctx->create_sampler_state(ctx, &sampler_desc);
286   if (sampler == NULL)
287      exit(6);
288
289   ctx->bind_sampler_states(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sampler);
290
291}
292
293static void init( void )
294{
295   struct pipe_framebuffer_state fb;
296   struct pipe_resource templat;
297   struct pipe_surface surf_tmpl;
298   int i;
299
300   /* It's hard to say whether window or screen should be created
301    * first.  Different environments would prefer one or the other.
302    *
303    * Also, no easy way of querying supported formats if the screen
304    * cannot be created first.
305    */
306   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
307      screen = graw_create_window_and_screen(0, 0, 300, 300,
308                                             formats[i],
309                                             &window);
310      if (window && screen)
311         break;
312   }
313   if (!screen || !window) {
314      fprintf(stderr, "Unable to create window\n");
315      exit(1);
316   }
317
318   ctx = screen->context_create(screen, NULL);
319   if (ctx == NULL)
320      exit(3);
321
322   templat.target = PIPE_TEXTURE_2D;
323   templat.format = formats[i];
324   templat.width0 = WIDTH;
325   templat.height0 = HEIGHT;
326   templat.depth0 = 1;
327   templat.array_size = 1;
328   templat.last_level = 0;
329   templat.nr_samples = 1;
330   templat.bind = (PIPE_BIND_RENDER_TARGET |
331                   PIPE_BIND_DISPLAY_TARGET);
332
333   rttex = screen->resource_create(screen,
334                                 &templat);
335   if (rttex == NULL)
336      exit(4);
337
338   surf_tmpl.format = templat.format;
339   surf_tmpl.u.tex.level = 0;
340   surf_tmpl.u.tex.first_layer = 0;
341   surf_tmpl.u.tex.last_layer = 0;
342   surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
343   if (surf == NULL)
344      exit(5);
345
346   memset(&fb, 0, sizeof fb);
347   fb.nr_cbufs = 1;
348   fb.width = WIDTH;
349   fb.height = HEIGHT;
350   fb.cbufs[0] = surf;
351
352   ctx->set_framebuffer_state(ctx, &fb);
353
354   {
355      struct pipe_blend_state blend;
356      void *handle;
357      memset(&blend, 0, sizeof blend);
358      blend.rt[0].colormask = PIPE_MASK_RGBA;
359      handle = ctx->create_blend_state(ctx, &blend);
360      ctx->bind_blend_state(ctx, handle);
361   }
362
363   {
364      struct pipe_depth_stencil_alpha_state depthstencil;
365      void *handle;
366      memset(&depthstencil, 0, sizeof depthstencil);
367      handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
368      ctx->bind_depth_stencil_alpha_state(ctx, handle);
369   }
370
371   {
372      struct pipe_rasterizer_state rasterizer;
373      void *handle;
374      memset(&rasterizer, 0, sizeof rasterizer);
375      rasterizer.cull_face = PIPE_FACE_NONE;
376      rasterizer.half_pixel_center = 1;
377      rasterizer.bottom_edge_rule = 1;
378      rasterizer.depth_clip = 1;
379      handle = ctx->create_rasterizer_state(ctx, &rasterizer);
380      ctx->bind_rasterizer_state(ctx, handle);
381   }
382
383   set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
384
385   init_tex();
386
387   set_vertices();
388   set_vertex_shader();
389   set_fragment_shader();
390}
391
392static void args(int argc, char *argv[])
393{
394   int i;
395
396   for (i = 1; i < argc;) {
397      if (graw_parse_args(&i, argc, argv)) {
398         continue;
399      }
400      exit(1);
401   }
402}
403
404
405int main( int argc, char *argv[] )
406{
407   args(argc, argv);
408   init();
409
410   graw_set_display_func( draw );
411   graw_main_loop();
412   return 0;
413}
414