1 /*
2 * Test draw instancing.
3 */
4
5 #include <stdio.h>
6 #include <string.h>
7
8 #include "frontend/graw.h"
9 #include "pipe/p_screen.h"
10 #include "pipe/p_context.h"
11 #include "pipe/p_state.h"
12 #include "pipe/p_defines.h"
13
14 #include "util/u_memory.h" /* Offset() */
15 #include "util/u_draw_quad.h"
16 #include "util/u_inlines.h"
17
18
19 enum pipe_format formats[] = {
20 PIPE_FORMAT_RGBA8888_UNORM,
21 PIPE_FORMAT_BGRA8888_UNORM,
22 PIPE_FORMAT_NONE
23 };
24
25 static const int WIDTH = 300;
26 static const int HEIGHT = 300;
27
28 static struct pipe_screen *screen = NULL;
29 static struct pipe_context *ctx = NULL;
30 static struct pipe_surface *surf = NULL;
31 static struct pipe_resource *tex = NULL;
32 static void *window = NULL;
33
34 struct vertex {
35 float position[4];
36 float color[4];
37 };
38
39
40 static int draw_elements = 0;
41
42
43 /**
44 * Vertex data.
45 * Each vertex has three attributes: position, color and translation.
46 * The translation attribute is a per-instance attribute. See
47 * "instance_divisor" below.
48 */
49 static struct vertex vertices[4] =
50 {
51 {
52 { 0.0f, -0.3f, 0.0f, 1.0f }, /* pos */
53 { 1.0f, 0.0f, 0.0f, 1.0f } /* color */
54 },
55 {
56 { -0.2f, 0.3f, 0.0f, 1.0f },
57 { 0.0f, 1.0f, 0.0f, 1.0f }
58 },
59 {
60 { 0.2f, 0.3f, 0.0f, 1.0f },
61 { 0.0f, 0.0f, 1.0f, 1.0f }
62 }
63 };
64
65
66 #define NUM_INST 5
67
68 static float inst_data[NUM_INST][4] =
69 {
70 { -0.50f, 0.4f, 0.0f, 0.0f },
71 { -0.25f, 0.1f, 0.0f, 0.0f },
72 { 0.00f, 0.2f, 0.0f, 0.0f },
73 { 0.25f, 0.1f, 0.0f, 0.0f },
74 { 0.50f, 0.3f, 0.0f, 0.0f }
75 };
76
77
78 static ushort indices[3] = { 0, 2, 1 };
79
80
set_viewport(float x,float y,float width,float height,float zNear,float zFar)81 static void set_viewport( float x, float y,
82 float width, float height,
83 float zNear, float zFar)
84 {
85 float z = zFar;
86 float half_width = (float)width / 2.0f;
87 float half_height = (float)height / 2.0f;
88 float half_depth = ((float)zFar - (float)zNear) / 2.0f;
89 struct pipe_viewport_state vp;
90
91 vp.scale[0] = half_width;
92 vp.scale[1] = half_height;
93 vp.scale[2] = half_depth;
94
95 vp.translate[0] = half_width + x;
96 vp.translate[1] = half_height + y;
97 vp.translate[2] = half_depth + z;
98
99 ctx->set_viewport_states( ctx, 0, 1, &vp );
100 }
101
102
set_vertices(void)103 static void set_vertices( void )
104 {
105 struct pipe_vertex_element ve[3];
106 struct pipe_vertex_buffer vbuf[2];
107 void *handle;
108
109 memset(ve, 0, sizeof ve);
110
111 /* pos */
112 ve[0].src_offset = Offset(struct vertex, position);
113 ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
114 ve[0].vertex_buffer_index = 0;
115
116 /* color */
117 ve[1].src_offset = Offset(struct vertex, color);
118 ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
119 ve[1].vertex_buffer_index = 0;
120
121 /* per-instance info */
122 ve[2].src_offset = 0;
123 ve[2].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
124 ve[2].vertex_buffer_index = 1;
125 ve[2].instance_divisor = 1;
126
127 handle = ctx->create_vertex_elements_state(ctx, 3, ve);
128 ctx->bind_vertex_elements_state(ctx, handle);
129
130 memset(&vbuf, 0, sizeof vbuf);
131
132 /* vertex data */
133 vbuf[0].stride = sizeof( struct vertex );
134 vbuf[0].buffer_offset = 0;
135 vbuf[0].buffer.resource = pipe_buffer_create_with_data(ctx,
136 PIPE_BIND_VERTEX_BUFFER,
137 PIPE_USAGE_DEFAULT,
138 sizeof(vertices),
139 vertices);
140
141 /* instance data */
142 vbuf[1].stride = sizeof( inst_data[0] );
143 vbuf[1].buffer_offset = 0;
144 vbuf[1].buffer.resource = pipe_buffer_create_with_data(ctx,
145 PIPE_BIND_VERTEX_BUFFER,
146 PIPE_USAGE_DEFAULT,
147 sizeof(inst_data),
148 inst_data);
149
150 ctx->set_vertex_buffers(ctx, 0, 2, vbuf);
151 }
152
set_vertex_shader(void)153 static void set_vertex_shader( void )
154 {
155 void *handle;
156 const char *text =
157 "VERT\n"
158 "DCL IN[0]\n"
159 "DCL IN[1]\n"
160 "DCL IN[2]\n"
161 "DCL OUT[0], POSITION\n"
162 "DCL OUT[1], COLOR\n"
163 " 0: MOV OUT[1], IN[1]\n"
164 " 1: ADD OUT[0], IN[0], IN[2]\n" /* add instance pos to vertex pos */
165 " 2: END\n";
166
167 handle = graw_parse_vertex_shader(ctx, text);
168 ctx->bind_vs_state(ctx, handle);
169 }
170
set_fragment_shader(void)171 static void set_fragment_shader( void )
172 {
173 void *handle;
174 const char *text =
175 "FRAG\n"
176 "DCL IN[0], COLOR, LINEAR\n"
177 "DCL OUT[0], COLOR\n"
178 " 0: MOV OUT[0], IN[0]\n"
179 " 1: END\n";
180
181 handle = graw_parse_fragment_shader(ctx, text);
182 ctx->bind_fs_state(ctx, handle);
183 }
184
185
draw(void)186 static void draw( void )
187 {
188 union pipe_color_union clear_color = { {1,0,1,1} };
189 struct pipe_draw_info info;
190
191 ctx->clear(ctx, PIPE_CLEAR_COLOR, NULL, &clear_color, 0, 0);
192
193
194 util_draw_init_info(&info);
195 info.index_size = draw_elements ? 2 : 0;
196 info.mode = PIPE_PRIM_TRIANGLES;
197 info.start = 0;
198 info.count = 3;
199 /* draw NUM_INST triangles */
200 info.instance_count = NUM_INST;
201
202 /* index data */
203 if (info.index_size) {
204 info.index.resource =
205 pipe_buffer_create_with_data(ctx,
206 PIPE_BIND_INDEX_BUFFER,
207 PIPE_USAGE_DEFAULT,
208 sizeof(indices),
209 indices);
210 }
211
212 ctx->draw_vbo(ctx, &info);
213
214 pipe_resource_reference(&info.index.resource, NULL);
215
216 ctx->flush(ctx, NULL, 0);
217
218 graw_save_surface_to_file(ctx, surf, NULL);
219
220 screen->flush_frontbuffer(screen, tex, 0, 0, window, NULL);
221 }
222
223
init(void)224 static void init( void )
225 {
226 struct pipe_framebuffer_state fb;
227 struct pipe_resource templat;
228 struct pipe_surface surf_tmpl;
229 int i;
230
231 /* It's hard to say whether window or screen should be created
232 * first. Different environments would prefer one or the other.
233 *
234 * Also, no easy way of querying supported formats if the screen
235 * cannot be created first.
236 */
237 for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
238 screen = graw_create_window_and_screen(0, 0, 300, 300,
239 formats[i],
240 &window);
241 if (window && screen)
242 break;
243 }
244 if (!screen || !window) {
245 fprintf(stderr, "Unable to create window\n");
246 exit(1);
247 }
248
249 ctx = screen->context_create(screen, NULL, 0);
250 if (ctx == NULL)
251 exit(3);
252
253 memset(&templat, 0, sizeof(templat));
254 templat.target = PIPE_TEXTURE_2D;
255 templat.format = formats[i];
256 templat.width0 = WIDTH;
257 templat.height0 = HEIGHT;
258 templat.depth0 = 1;
259 templat.array_size = 1;
260 templat.last_level = 0;
261 templat.bind = (PIPE_BIND_RENDER_TARGET |
262 PIPE_BIND_DISPLAY_TARGET);
263
264 tex = screen->resource_create(screen,
265 &templat);
266 if (tex == NULL)
267 exit(4);
268
269 surf_tmpl.format = templat.format;
270 surf_tmpl.u.tex.level = 0;
271 surf_tmpl.u.tex.first_layer = 0;
272 surf_tmpl.u.tex.last_layer = 0;
273 surf = ctx->create_surface(ctx, tex, &surf_tmpl);
274 if (surf == NULL)
275 exit(5);
276
277 memset(&fb, 0, sizeof fb);
278 fb.nr_cbufs = 1;
279 fb.width = WIDTH;
280 fb.height = HEIGHT;
281 fb.cbufs[0] = surf;
282
283 ctx->set_framebuffer_state(ctx, &fb);
284
285 {
286 struct pipe_blend_state blend;
287 void *handle;
288 memset(&blend, 0, sizeof blend);
289 blend.rt[0].colormask = PIPE_MASK_RGBA;
290 handle = ctx->create_blend_state(ctx, &blend);
291 ctx->bind_blend_state(ctx, handle);
292 }
293
294 {
295 struct pipe_depth_stencil_alpha_state depthstencil;
296 void *handle;
297 memset(&depthstencil, 0, sizeof depthstencil);
298 handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
299 ctx->bind_depth_stencil_alpha_state(ctx, handle);
300 }
301
302 {
303 struct pipe_rasterizer_state rasterizer;
304 void *handle;
305 memset(&rasterizer, 0, sizeof rasterizer);
306 rasterizer.cull_face = PIPE_FACE_NONE;
307 rasterizer.half_pixel_center = 1;
308 rasterizer.bottom_edge_rule = 1;
309 rasterizer.depth_clip_near = 1;
310 rasterizer.depth_clip_far = 1;
311 handle = ctx->create_rasterizer_state(ctx, &rasterizer);
312 ctx->bind_rasterizer_state(ctx, handle);
313 }
314
315 set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
316 set_vertices();
317 set_vertex_shader();
318 set_fragment_shader();
319 }
320
321
options(int argc,char * argv[])322 static void options(int argc, char *argv[])
323 {
324 int i;
325
326 for (i = 1; i < argc;) {
327 if (graw_parse_args(&i, argc, argv)) {
328 continue;
329 }
330 if (strcmp(argv[i], "-e") == 0) {
331 draw_elements = 1;
332 i++;
333 }
334 else {
335 i++;
336 }
337 }
338 if (draw_elements)
339 printf("Using pipe_context::draw_elements_instanced()\n");
340 else
341 printf("Using pipe_context::draw_arrays_instanced()\n");
342 }
343
344
main(int argc,char * argv[])345 int main( int argc, char *argv[] )
346 {
347 options(argc, argv);
348
349 init();
350
351 graw_set_display_func( draw );
352 graw_main_loop();
353 return 0;
354 }
355