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_R8G8B8A8_UNORM,
22   PIPE_FORMAT_B8G8R8A8_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_state( ctx, &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
101   vbuf.stride = sizeof( struct vertex );
102   vbuf.buffer_offset = 0;
103   vbuf.buffer = pipe_buffer_create_with_data(ctx,
104                                              PIPE_BIND_VERTEX_BUFFER,
105                                              PIPE_USAGE_STATIC,
106                                              sizeof(vertices),
107                                              vertices);
108
109   ctx->set_vertex_buffers(ctx, 1, &vbuf);
110}
111
112static void set_vertex_shader( void )
113{
114   void *handle;
115   const char *text =
116      "VERT\n"
117      "DCL IN[0]\n"
118      "DCL IN[1]\n"
119      "DCL OUT[0], POSITION\n"
120      "DCL OUT[1], GENERIC[0]\n"
121      "  0: MOV OUT[1], IN[1]\n"
122      "  1: MOV OUT[0], IN[0]\n"
123      "  2: END\n";
124
125   handle = graw_parse_vertex_shader(ctx, text);
126   ctx->bind_vs_state(ctx, handle);
127}
128
129static void set_fragment_shader( void )
130{
131   void *handle;
132   const char *text =
133      "FRAG\n"
134      "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
135      "DCL OUT[0], COLOR\n"
136      "DCL TEMP[0]\n"
137      "DCL SAMP[0]\n"
138      "DCL RES[0], 2D, FLOAT\n"
139      "  0: SAMPLE TEMP[0], IN[0], RES[0], SAMP[0]\n"
140      "  1: MOV OUT[0], TEMP[0]\n"
141      "  2: END\n";
142
143   handle = graw_parse_fragment_shader(ctx, text);
144   ctx->bind_fs_state(ctx, handle);
145}
146
147
148static void draw( void )
149{
150   union pipe_color_union clear_color = { {.5,.5,.5,1} };
151
152   ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
153   util_draw_arrays(ctx, PIPE_PRIM_QUADS, 0, 4);
154   ctx->flush(ctx, NULL);
155
156   graw_save_surface_to_file(ctx, surf, NULL);
157
158   screen->flush_frontbuffer(screen, rttex, 0, 0, window);
159}
160
161#define SIZE 16
162
163static void init_tex( void )
164{
165   struct pipe_sampler_view sv_template;
166   struct pipe_sampler_state sampler_desc;
167   struct pipe_resource templat;
168   struct pipe_box box;
169   ubyte tex2d[SIZE][SIZE][4];
170   int s, t;
171
172#if (SIZE != 2)
173   for (s = 0; s < SIZE; s++) {
174      for (t = 0; t < SIZE; t++) {
175         if (0) {
176            int x = (s ^ t) & 1;
177	    tex2d[t][s][0] = (x) ? 0 : 63;
178	    tex2d[t][s][1] = (x) ? 0 : 128;
179	    tex2d[t][s][2] = 0;
180	    tex2d[t][s][3] = 0xff;
181         }
182         else {
183            int x = ((s ^ t) >> 2) & 1;
184	    tex2d[t][s][0] = s*255/(SIZE-1);
185	    tex2d[t][s][1] = t*255/(SIZE-1);
186	    tex2d[t][s][2] = (x) ? 0 : 128;
187	    tex2d[t][s][3] = 0xff;
188         }
189      }
190   }
191#else
192   tex2d[0][0][0] = 0;
193   tex2d[0][0][1] = 255;
194   tex2d[0][0][2] = 255;
195   tex2d[0][0][3] = 0;
196
197   tex2d[0][1][0] = 0;
198   tex2d[0][1][1] = 0;
199   tex2d[0][1][2] = 255;
200   tex2d[0][1][3] = 255;
201
202   tex2d[1][0][0] = 255;
203   tex2d[1][0][1] = 255;
204   tex2d[1][0][2] = 0;
205   tex2d[1][0][3] = 255;
206
207   tex2d[1][1][0] = 255;
208   tex2d[1][1][1] = 0;
209   tex2d[1][1][2] = 0;
210   tex2d[1][1][3] = 255;
211#endif
212
213   templat.target = PIPE_TEXTURE_2D;
214   templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
215   templat.width0 = SIZE;
216   templat.height0 = SIZE;
217   templat.depth0 = 1;
218   templat.last_level = 0;
219   templat.nr_samples = 1;
220   templat.bind = PIPE_BIND_SAMPLER_VIEW;
221
222
223   samptex = screen->resource_create(screen,
224                                 &templat);
225   if (samptex == NULL)
226      exit(4);
227
228   u_box_2d(0,0,SIZE,SIZE, &box);
229
230   ctx->transfer_inline_write(ctx,
231                              samptex,
232                              0,
233                              PIPE_TRANSFER_WRITE,
234                              &box,
235                              tex2d,
236                              sizeof tex2d[0],
237                              sizeof tex2d);
238
239   /* Possibly read back & compare against original data:
240    */
241   if (0)
242   {
243      struct pipe_transfer *t;
244      uint32_t *ptr;
245      t = pipe_get_transfer(ctx, samptex,
246                            0, 0, /* level, layer */
247                            PIPE_TRANSFER_READ,
248                            0, 0, SIZE, SIZE); /* x, y, width, height */
249
250      ptr = ctx->transfer_map(ctx, t);
251
252      if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
253         assert(0);
254         exit(9);
255      }
256
257      ctx->transfer_unmap(ctx, t);
258
259      ctx->transfer_destroy(ctx, t);
260   }
261
262   memset(&sv_template, 0, sizeof sv_template);
263   sv_template.format = samptex->format;
264   sv_template.texture = samptex;
265   sv_template.swizzle_r = 0;
266   sv_template.swizzle_g = 1;
267   sv_template.swizzle_b = 2;
268   sv_template.swizzle_a = 3;
269   sv = ctx->create_sampler_view(ctx, samptex, &sv_template);
270   if (sv == NULL)
271      exit(5);
272
273   ctx->set_fragment_sampler_views(ctx, 1, &sv);
274
275
276   memset(&sampler_desc, 0, sizeof sampler_desc);
277   sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;
278   sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;
279   sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;
280   sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;
281   sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
282   sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
283   sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;
284   sampler_desc.compare_func = 0;
285   sampler_desc.normalized_coords = 1;
286   sampler_desc.max_anisotropy = 0;
287
288   sampler = ctx->create_sampler_state(ctx, &sampler_desc);
289   if (sampler == NULL)
290      exit(6);
291
292   ctx->bind_fragment_sampler_states(ctx, 1, &sampler);
293
294}
295
296static void init( void )
297{
298   struct pipe_framebuffer_state fb;
299   struct pipe_resource templat;
300   struct pipe_surface surf_tmpl;
301   int i;
302
303   /* It's hard to say whether window or screen should be created
304    * first.  Different environments would prefer one or the other.
305    *
306    * Also, no easy way of querying supported formats if the screen
307    * cannot be created first.
308    */
309   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
310      screen = graw_create_window_and_screen(0, 0, 300, 300,
311                                             formats[i],
312                                             &window);
313      if (window && screen)
314         break;
315   }
316   if (!screen || !window) {
317      fprintf(stderr, "Unable to create window\n");
318      exit(1);
319   }
320
321   ctx = screen->context_create(screen, NULL);
322   if (ctx == NULL)
323      exit(3);
324
325   templat.target = PIPE_TEXTURE_2D;
326   templat.format = formats[i];
327   templat.width0 = WIDTH;
328   templat.height0 = HEIGHT;
329   templat.depth0 = 1;
330   templat.array_size = 1;
331   templat.last_level = 0;
332   templat.nr_samples = 1;
333   templat.bind = (PIPE_BIND_RENDER_TARGET |
334                   PIPE_BIND_DISPLAY_TARGET);
335
336   rttex = screen->resource_create(screen,
337                                 &templat);
338   if (rttex == NULL)
339      exit(4);
340
341   surf_tmpl.format = templat.format;
342   surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
343   surf_tmpl.u.tex.level = 0;
344   surf_tmpl.u.tex.first_layer = 0;
345   surf_tmpl.u.tex.last_layer = 0;
346   surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
347   if (surf == NULL)
348      exit(5);
349
350   memset(&fb, 0, sizeof fb);
351   fb.nr_cbufs = 1;
352   fb.width = WIDTH;
353   fb.height = HEIGHT;
354   fb.cbufs[0] = surf;
355
356   ctx->set_framebuffer_state(ctx, &fb);
357
358   {
359      struct pipe_blend_state blend;
360      void *handle;
361      memset(&blend, 0, sizeof blend);
362      blend.rt[0].colormask = PIPE_MASK_RGBA;
363      handle = ctx->create_blend_state(ctx, &blend);
364      ctx->bind_blend_state(ctx, handle);
365   }
366
367   {
368      struct pipe_depth_stencil_alpha_state depthstencil;
369      void *handle;
370      memset(&depthstencil, 0, sizeof depthstencil);
371      handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
372      ctx->bind_depth_stencil_alpha_state(ctx, handle);
373   }
374
375   {
376      struct pipe_rasterizer_state rasterizer;
377      void *handle;
378      memset(&rasterizer, 0, sizeof rasterizer);
379      rasterizer.cull_face = PIPE_FACE_NONE;
380      rasterizer.gl_rasterization_rules = 1;
381      rasterizer.depth_clip = 1;
382      handle = ctx->create_rasterizer_state(ctx, &rasterizer);
383      ctx->bind_rasterizer_state(ctx, handle);
384   }
385
386   set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
387
388   init_tex();
389
390   set_vertices();
391   set_vertex_shader();
392   set_fragment_shader();
393}
394
395static void args(int argc, char *argv[])
396{
397   int i;
398
399   for (i = 1; i < argc;) {
400      if (graw_parse_args(&i, argc, argv)) {
401         continue;
402      }
403      exit(1);
404   }
405}
406
407
408int main( int argc, char *argv[] )
409{
410   args(argc, argv);
411   init();
412
413   graw_set_display_func( draw );
414   graw_main_loop();
415   return 0;
416}
417