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
20 enum pipe_format formats[] = {
21 PIPE_FORMAT_R8G8B8A8_UNORM,
22 PIPE_FORMAT_B8G8R8A8_UNORM,
23 PIPE_FORMAT_NONE
24 };
25
26 static const int WIDTH = 300;
27 static const int HEIGHT = 300;
28
29 static struct pipe_screen *screen = NULL;
30 static struct pipe_context *ctx = NULL;
31 static struct pipe_resource *rttex = NULL;
32 static struct pipe_resource *samptex = NULL;
33 static struct pipe_surface *surf = NULL;
34 static struct pipe_sampler_view *sv = NULL;
35 static void *sampler = NULL;
36 static void *window = NULL;
37
38 struct vertex {
39 float position[4];
40 float color[4];
41 };
42
43 static 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
set_viewport(float x,float y,float width,float height,float near,float far)61 static 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
set_vertices(void)84 static 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
set_vertex_shader(void)112 static 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
set_fragment_shader(void)129 static 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
draw(void)148 static 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
init_tex(void)163 static 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
init(void)296 static 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
args(int argc,char * argv[])395 static 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
main(int argc,char * argv[])408 int 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