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 vp.swizzle_x = PIPE_VIEWPORT_SWIZZLE_POSITIVE_X;
100 vp.swizzle_y = PIPE_VIEWPORT_SWIZZLE_POSITIVE_Y;
101 vp.swizzle_z = PIPE_VIEWPORT_SWIZZLE_POSITIVE_Z;
102 vp.swizzle_w = PIPE_VIEWPORT_SWIZZLE_POSITIVE_W;
103
104 ctx->set_viewport_states( ctx, 0, 1, &vp );
105 }
106
107
set_vertices(void)108 static void set_vertices( void )
109 {
110 struct pipe_vertex_element ve[3];
111 struct pipe_vertex_buffer vbuf[2];
112 void *handle;
113
114 memset(ve, 0, sizeof ve);
115
116 /* pos */
117 ve[0].src_offset = Offset(struct vertex, position);
118 ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
119 ve[0].vertex_buffer_index = 0;
120
121 /* color */
122 ve[1].src_offset = Offset(struct vertex, color);
123 ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
124 ve[1].vertex_buffer_index = 0;
125
126 /* per-instance info */
127 ve[2].src_offset = 0;
128 ve[2].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
129 ve[2].vertex_buffer_index = 1;
130 ve[2].instance_divisor = 1;
131
132 handle = ctx->create_vertex_elements_state(ctx, 3, ve);
133 ctx->bind_vertex_elements_state(ctx, handle);
134
135 memset(&vbuf, 0, sizeof vbuf);
136
137 /* vertex data */
138 vbuf[0].stride = sizeof( struct vertex );
139 vbuf[0].buffer_offset = 0;
140 vbuf[0].buffer.resource = pipe_buffer_create_with_data(ctx,
141 PIPE_BIND_VERTEX_BUFFER,
142 PIPE_USAGE_DEFAULT,
143 sizeof(vertices),
144 vertices);
145
146 /* instance data */
147 vbuf[1].stride = sizeof( inst_data[0] );
148 vbuf[1].buffer_offset = 0;
149 vbuf[1].buffer.resource = pipe_buffer_create_with_data(ctx,
150 PIPE_BIND_VERTEX_BUFFER,
151 PIPE_USAGE_DEFAULT,
152 sizeof(inst_data),
153 inst_data);
154
155 ctx->set_vertex_buffers(ctx, 0, 2, 0, false, vbuf);
156 }
157
set_vertex_shader(void)158 static void set_vertex_shader( void )
159 {
160 void *handle;
161 const char *text =
162 "VERT\n"
163 "DCL IN[0]\n"
164 "DCL IN[1]\n"
165 "DCL IN[2]\n"
166 "DCL OUT[0], POSITION\n"
167 "DCL OUT[1], COLOR\n"
168 " 0: MOV OUT[1], IN[1]\n"
169 " 1: ADD OUT[0], IN[0], IN[2]\n" /* add instance pos to vertex pos */
170 " 2: END\n";
171
172 handle = graw_parse_vertex_shader(ctx, text);
173 ctx->bind_vs_state(ctx, handle);
174 }
175
set_fragment_shader(void)176 static void set_fragment_shader( void )
177 {
178 void *handle;
179 const char *text =
180 "FRAG\n"
181 "DCL IN[0], COLOR, LINEAR\n"
182 "DCL OUT[0], COLOR\n"
183 " 0: MOV OUT[0], IN[0]\n"
184 " 1: END\n";
185
186 handle = graw_parse_fragment_shader(ctx, text);
187 ctx->bind_fs_state(ctx, handle);
188 }
189
190
draw(void)191 static void draw( void )
192 {
193 union pipe_color_union clear_color = { {1,0,1,1} };
194 struct pipe_draw_info info;
195 struct pipe_draw_start_count_bias draw;
196
197 ctx->clear(ctx, PIPE_CLEAR_COLOR, NULL, &clear_color, 0, 0);
198
199
200 util_draw_init_info(&info);
201 info.index_size = draw_elements ? 2 : 0;
202 info.mode = PIPE_PRIM_TRIANGLES;
203 draw.start = 0;
204 draw.count = 3;
205 draw.index_bias = 0;
206 /* draw NUM_INST triangles */
207 info.instance_count = NUM_INST;
208
209 /* index data */
210 if (info.index_size) {
211 info.index.resource =
212 pipe_buffer_create_with_data(ctx,
213 PIPE_BIND_INDEX_BUFFER,
214 PIPE_USAGE_DEFAULT,
215 sizeof(indices),
216 indices);
217 }
218
219 ctx->draw_vbo(ctx, &info, 0, NULL, &draw, 1);
220
221 pipe_resource_reference(&info.index.resource, NULL);
222
223 ctx->flush(ctx, NULL, 0);
224
225 graw_save_surface_to_file(ctx, surf, NULL);
226
227 screen->flush_frontbuffer(screen, ctx, tex, 0, 0, window, NULL);
228 }
229
230
init(void)231 static void init( void )
232 {
233 struct pipe_framebuffer_state fb;
234 struct pipe_resource templat;
235 struct pipe_surface surf_tmpl;
236 int i;
237
238 /* It's hard to say whether window or screen should be created
239 * first. Different environments would prefer one or the other.
240 *
241 * Also, no easy way of querying supported formats if the screen
242 * cannot be created first.
243 */
244 for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
245 screen = graw_create_window_and_screen(0, 0, 300, 300,
246 formats[i],
247 &window);
248 if (window && screen)
249 break;
250 }
251 if (!screen || !window) {
252 fprintf(stderr, "Unable to create window\n");
253 exit(1);
254 }
255
256 ctx = screen->context_create(screen, NULL, 0);
257 if (ctx == NULL)
258 exit(3);
259
260 memset(&templat, 0, sizeof(templat));
261 templat.target = PIPE_TEXTURE_2D;
262 templat.format = formats[i];
263 templat.width0 = WIDTH;
264 templat.height0 = HEIGHT;
265 templat.depth0 = 1;
266 templat.array_size = 1;
267 templat.last_level = 0;
268 templat.bind = (PIPE_BIND_RENDER_TARGET |
269 PIPE_BIND_DISPLAY_TARGET);
270
271 tex = screen->resource_create(screen,
272 &templat);
273 if (tex == NULL)
274 exit(4);
275
276 surf_tmpl.format = templat.format;
277 surf_tmpl.u.tex.level = 0;
278 surf_tmpl.u.tex.first_layer = 0;
279 surf_tmpl.u.tex.last_layer = 0;
280 surf = ctx->create_surface(ctx, tex, &surf_tmpl);
281 if (surf == NULL)
282 exit(5);
283
284 memset(&fb, 0, sizeof fb);
285 fb.nr_cbufs = 1;
286 fb.width = WIDTH;
287 fb.height = HEIGHT;
288 fb.cbufs[0] = surf;
289
290 ctx->set_framebuffer_state(ctx, &fb);
291
292 {
293 struct pipe_blend_state blend;
294 void *handle;
295 memset(&blend, 0, sizeof blend);
296 blend.rt[0].colormask = PIPE_MASK_RGBA;
297 handle = ctx->create_blend_state(ctx, &blend);
298 ctx->bind_blend_state(ctx, handle);
299 }
300
301 {
302 struct pipe_depth_stencil_alpha_state depthstencil;
303 void *handle;
304 memset(&depthstencil, 0, sizeof depthstencil);
305 handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);
306 ctx->bind_depth_stencil_alpha_state(ctx, handle);
307 }
308
309 {
310 struct pipe_rasterizer_state rasterizer;
311 void *handle;
312 memset(&rasterizer, 0, sizeof rasterizer);
313 rasterizer.cull_face = PIPE_FACE_NONE;
314 rasterizer.half_pixel_center = 1;
315 rasterizer.bottom_edge_rule = 1;
316 rasterizer.depth_clip_near = 1;
317 rasterizer.depth_clip_far = 1;
318 handle = ctx->create_rasterizer_state(ctx, &rasterizer);
319 ctx->bind_rasterizer_state(ctx, handle);
320 }
321
322 set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000);
323 set_vertices();
324 set_vertex_shader();
325 set_fragment_shader();
326 }
327
328
options(int argc,char * argv[])329 static void options(int argc, char *argv[])
330 {
331 int i;
332
333 for (i = 1; i < argc;) {
334 if (graw_parse_args(&i, argc, argv)) {
335 continue;
336 }
337 if (strcmp(argv[i], "-e") == 0) {
338 draw_elements = 1;
339 i++;
340 }
341 else {
342 i++;
343 }
344 }
345 if (draw_elements)
346 printf("Using pipe_context::draw_elements_instanced()\n");
347 else
348 printf("Using pipe_context::draw_arrays_instanced()\n");
349 }
350
351
main(int argc,char * argv[])352 int main( int argc, char *argv[] )
353 {
354 options(argc, argv);
355
356 init();
357
358 graw_set_display_func( draw );
359 graw_main_loop();
360 return 0;
361 }
362