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