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
20 enum pipe_format formats[] = {
21 PIPE_FORMAT_RGBA8888_UNORM,
22 PIPE_FORMAT_BGRA8888_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 zNear,float zFar)61 static 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
set_vertices(void)87 static 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
set_vertex_shader(void)116 static 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
set_fragment_shader(void)133 static 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
draw(void)152 static 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
init_tex(void)167 static 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
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, 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
args(int argc,char * argv[])396 static 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
main(int argc,char * argv[])409 int 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