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 "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 zNear, float zFar)
64{
65   float z = zFar;
66   float half_width = (float)width / 2.0f;
67   float half_height = (float)height / 2.0f;
68   float half_depth = ((float)zFar - (float)zNear) / 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
75   vp.translate[0] = half_width + x;
76   vp.translate[1] = half_height + y;
77   vp.translate[2] = half_depth + z;
78
79   vp.swizzle_x = PIPE_VIEWPORT_SWIZZLE_POSITIVE_X;
80   vp.swizzle_y = PIPE_VIEWPORT_SWIZZLE_POSITIVE_Y;
81   vp.swizzle_z = PIPE_VIEWPORT_SWIZZLE_POSITIVE_Z;
82   vp.swizzle_w = PIPE_VIEWPORT_SWIZZLE_POSITIVE_W;
83
84   ctx->set_viewport_states( ctx, 0, 1, &vp );
85}
86
87static void set_vertices( void )
88{
89   struct pipe_vertex_element ve[2];
90   struct pipe_vertex_buffer vbuf;
91   void *handle;
92
93   memset(ve, 0, sizeof ve);
94
95   ve[0].src_offset = Offset(struct vertex, position);
96   ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
97   ve[1].src_offset = Offset(struct vertex, color);
98   ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
99
100   handle = ctx->create_vertex_elements_state(ctx, 2, ve);
101   ctx->bind_vertex_elements_state(ctx, handle);
102
103   memset(&vbuf, 0, sizeof vbuf);
104
105   vbuf.stride = sizeof( struct vertex );
106   vbuf.buffer_offset = 0;
107   vbuf.buffer.resource = pipe_buffer_create_with_data(ctx,
108                                              PIPE_BIND_VERTEX_BUFFER,
109                                              PIPE_USAGE_DEFAULT,
110                                              sizeof(vertices),
111                                              vertices);
112
113   ctx->set_vertex_buffers(ctx, 0, 1, 0, false, &vbuf);
114}
115
116static void set_vertex_shader( void )
117{
118   void *handle;
119   const char *text =
120      "VERT\n"
121      "DCL IN[0]\n"
122      "DCL IN[1]\n"
123      "DCL OUT[0], POSITION\n"
124      "DCL OUT[1], GENERIC[0]\n"
125      "  0: MOV OUT[1], IN[1]\n"
126      "  1: MOV OUT[0], IN[0]\n"
127      "  2: END\n";
128
129   handle = graw_parse_vertex_shader(ctx, text);
130   ctx->bind_vs_state(ctx, handle);
131}
132
133static void set_fragment_shader( void )
134{
135   void *handle;
136   const char *text =
137      "FRAG\n"
138      "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
139      "DCL OUT[0], COLOR\n"
140      "DCL TEMP[0]\n"
141      "DCL SAMP[0]\n"
142      "DCL RES[0], 2D, FLOAT\n"
143      "  0: SAMPLE TEMP[0], IN[0], RES[0], SAMP[0]\n"
144      "  1: MOV OUT[0], TEMP[0]\n"
145      "  2: END\n";
146
147   handle = graw_parse_fragment_shader(ctx, text);
148   ctx->bind_fs_state(ctx, handle);
149}
150
151
152static void draw( void )
153{
154   union pipe_color_union clear_color = { {.5,.5,.5,1} };
155
156   ctx->clear(ctx, PIPE_CLEAR_COLOR, NULL, &clear_color, 0, 0);
157   util_draw_arrays(ctx, PIPE_PRIM_QUADS, 0, 4);
158   ctx->flush(ctx, NULL, 0);
159
160   graw_save_surface_to_file(ctx, surf, NULL);
161
162   screen->flush_frontbuffer(screen, ctx, rttex, 0, 0, window, NULL);
163}
164
165#define SIZE 16
166
167static void init_tex( void )
168{
169   struct pipe_sampler_view sv_template;
170   struct pipe_sampler_state sampler_desc;
171   struct pipe_resource templat;
172   struct pipe_box box;
173   ubyte tex2d[SIZE][SIZE][4];
174   int s, t;
175
176#if (SIZE != 2)
177   for (s = 0; s < SIZE; s++) {
178      for (t = 0; t < SIZE; t++) {
179         if (0) {
180            int x = (s ^ t) & 1;
181	    tex2d[t][s][0] = (x) ? 0 : 63;
182	    tex2d[t][s][1] = (x) ? 0 : 128;
183	    tex2d[t][s][2] = 0;
184	    tex2d[t][s][3] = 0xff;
185         }
186         else {
187            int x = ((s ^ t) >> 2) & 1;
188	    tex2d[t][s][0] = s*255/(SIZE-1);
189	    tex2d[t][s][1] = t*255/(SIZE-1);
190	    tex2d[t][s][2] = (x) ? 0 : 128;
191	    tex2d[t][s][3] = 0xff;
192         }
193      }
194   }
195#else
196   tex2d[0][0][0] = 0;
197   tex2d[0][0][1] = 255;
198   tex2d[0][0][2] = 255;
199   tex2d[0][0][3] = 0;
200
201   tex2d[0][1][0] = 0;
202   tex2d[0][1][1] = 0;
203   tex2d[0][1][2] = 255;
204   tex2d[0][1][3] = 255;
205
206   tex2d[1][0][0] = 255;
207   tex2d[1][0][1] = 255;
208   tex2d[1][0][2] = 0;
209   tex2d[1][0][3] = 255;
210
211   tex2d[1][1][0] = 255;
212   tex2d[1][1][1] = 0;
213   tex2d[1][1][2] = 0;
214   tex2d[1][1][3] = 255;
215#endif
216
217   memset(&templat, 0, sizeof(templat));
218   templat.target = PIPE_TEXTURE_2D;
219   templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;
220   templat.width0 = SIZE;
221   templat.height0 = SIZE;
222   templat.depth0 = 1;
223   templat.last_level = 0;
224   templat.bind = PIPE_BIND_SAMPLER_VIEW;
225
226
227   samptex = screen->resource_create(screen,
228                                 &templat);
229   if (samptex == NULL)
230      exit(4);
231
232   u_box_2d(0,0,SIZE,SIZE, &box);
233
234   ctx->texture_subdata(ctx,
235                        samptex,
236                        0,
237                        PIPE_MAP_WRITE,
238                        &box,
239                        tex2d,
240                        sizeof tex2d[0],
241                        sizeof tex2d);
242
243   /* Possibly read back & compare against original data:
244    */
245   if (0)
246   {
247      struct pipe_transfer *t;
248      uint32_t *ptr;
249      ptr = pipe_texture_map(ctx, samptex,
250                              0, 0, /* level, layer */
251                              PIPE_MAP_READ,
252                              0, 0, SIZE, SIZE, &t); /* x, y, width, height */
253
254      if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {
255         assert(0);
256         exit(9);
257      }
258
259      ctx->texture_unmap(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_sampler_views(ctx, PIPE_SHADER_FRAGMENT, 0, 1, 0, false, &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_sampler_states(ctx, PIPE_SHADER_FRAGMENT, 0, 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, 0);
322   if (ctx == NULL)
323      exit(3);
324
325   memset(&templat, 0, sizeof(templat));
326   templat.target = PIPE_TEXTURE_2D;
327   templat.format = formats[i];
328   templat.width0 = WIDTH;
329   templat.height0 = HEIGHT;
330   templat.depth0 = 1;
331   templat.array_size = 1;
332   templat.last_level = 0;
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.u.tex.level = 0;
343   surf_tmpl.u.tex.first_layer = 0;
344   surf_tmpl.u.tex.last_layer = 0;
345   surf = ctx->create_surface(ctx, rttex, &surf_tmpl);
346   if (surf == NULL)
347      exit(5);
348
349   memset(&fb, 0, sizeof fb);
350   fb.nr_cbufs = 1;
351   fb.width = WIDTH;
352   fb.height = HEIGHT;
353   fb.cbufs[0] = surf;
354
355   ctx->set_framebuffer_state(ctx, &fb);
356
357   {
358      struct pipe_blend_state blend;
359      void *handle;
360      memset(&blend, 0, sizeof blend);
361      blend.rt[0].colormask = PIPE_MASK_RGBA;
362      handle = ctx->create_blend_state(ctx, &blend);
363      ctx->bind_blend_state(ctx, handle);
364   }
365
366   {
367      struct pipe_depth_stencil_alpha_state depthstencil;
368      void *handle;
369      memset(&depthstencil, 0, sizeof depthstencil);
370      handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
371      ctx->bind_depth_stencil_alpha_state(ctx, handle);
372   }
373
374   {
375      struct pipe_rasterizer_state rasterizer;
376      void *handle;
377      memset(&rasterizer, 0, sizeof rasterizer);
378      rasterizer.cull_face = PIPE_FACE_NONE;
379      rasterizer.half_pixel_center = 1;
380      rasterizer.bottom_edge_rule = 1;
381      rasterizer.depth_clip_near = 1;
382      rasterizer.depth_clip_far = 1;
383      handle = ctx->create_rasterizer_state(ctx, &rasterizer);
384      ctx->bind_rasterizer_state(ctx, handle);
385   }
386
387   set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
388
389   init_tex();
390
391   set_vertices();
392   set_vertex_shader();
393   set_fragment_shader();
394}
395
396static void args(int argc, char *argv[])
397{
398   int i;
399
400   for (i = 1; i < argc;) {
401      if (graw_parse_args(&i, argc, argv)) {
402         continue;
403      }
404      exit(1);
405   }
406}
407
408
409int main( int argc, char *argv[] )
410{
411   args(argc, argv);
412   init();
413
414   graw_set_display_func( draw );
415   graw_main_loop();
416   return 0;
417}
418