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 "graw_util.h"
6
7static const int WIDTH = 300;
8static const int HEIGHT = 300;
9
10static struct graw_info info;
11
12
13static struct pipe_resource *texture = NULL;
14static struct pipe_sampler_view *sv = NULL;
15static void *sampler = NULL;
16
17struct vertex {
18   float position[4];
19   float color[4];
20};
21
22static struct vertex vertices[] =
23{
24   { { 0.9, -0.9, 0.0, 1.0 },
25     { 1, 0, 0, 1 } },
26
27   { { 0.9,  0.9, 0.0, 1.0 },
28     { 1, 1, 0, 1 } },
29
30   { {-0.9,  0.9, 0.0, 1.0 },
31     { 0, 1, 0, 1 } },
32
33   { {-0.9,  -0.9, 0.0, 1.0 },
34     { 0, 0, 0, 1 } },
35};
36
37
38
39
40static void set_vertices( void )
41{
42   struct pipe_vertex_element ve[2];
43   struct pipe_vertex_buffer vbuf;
44   void *handle;
45
46   memset(ve, 0, sizeof ve);
47
48   ve[0].src_offset = Offset(struct vertex, position);
49   ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
50   ve[1].src_offset = Offset(struct vertex, color);
51   ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
52
53   handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
54   info.ctx->bind_vertex_elements_state(info.ctx, handle);
55
56   memset(&vbuf, 0, sizeof vbuf);
57
58   vbuf.stride = sizeof( struct vertex );
59   vbuf.buffer_offset = 0;
60   vbuf.buffer.resource = pipe_buffer_create_with_data(info.ctx,
61                                              PIPE_BIND_VERTEX_BUFFER,
62                                              PIPE_USAGE_DEFAULT,
63                                              sizeof(vertices),
64                                              vertices);
65
66   info.ctx->set_vertex_buffers(info.ctx, 0, 1, 0, false, &vbuf);
67}
68
69static void set_vertex_shader( void )
70{
71   void *handle;
72   const char *text =
73      "VERT\n"
74      "DCL IN[0]\n"
75      "DCL IN[1]\n"
76      "DCL OUT[0], POSITION\n"
77      "DCL OUT[1], GENERIC[0]\n"
78      "  0: MOV OUT[1], IN[1]\n"
79      "  1: MOV OUT[0], IN[0]\n"
80      "  2: END\n";
81
82   handle = graw_parse_vertex_shader(info.ctx, text);
83   info.ctx->bind_vs_state(info.ctx, handle);
84}
85
86static void set_fragment_shader( void )
87{
88   void *handle;
89   const char *text =
90      "FRAG\n"
91      "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
92      "DCL OUT[0], COLOR\n"
93      "DCL TEMP[0]\n"
94      "DCL SAMP[0]\n"
95      "DCL SVIEW[0], 2D, FLOAT\n"
96      "  0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
97      "  1: MOV OUT[0], TEMP[0]\n"
98      "  2: END\n";
99
100   handle = graw_parse_fragment_shader(info.ctx, text);
101   info.ctx->bind_fs_state(info.ctx, handle);
102}
103
104
105static void draw( void )
106{
107   union pipe_color_union clear_color = { {.5,.5,.5,1} };
108
109   info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, NULL, &clear_color, 0, 0);
110   util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
111   info.ctx->flush(info.ctx, NULL, 0);
112
113   graw_save_surface_to_file(info.ctx, info.color_surf[0], NULL);
114
115   graw_util_flush_front(&info);
116}
117
118
119#define SIZE 16
120
121static void init_tex( void )
122{
123   ubyte tex2d[SIZE][SIZE][4];
124   int s, t;
125
126#if (SIZE != 2)
127   for (s = 0; s < SIZE; s++) {
128      for (t = 0; t < SIZE; t++) {
129         if (0) {
130            int x = (s ^ t) & 1;
131	    tex2d[t][s][0] = (x) ? 0 : 63;
132	    tex2d[t][s][1] = (x) ? 0 : 128;
133	    tex2d[t][s][2] = 0;
134	    tex2d[t][s][3] = 0xff;
135         }
136         else {
137            int x = ((s ^ t) >> 2) & 1;
138	    tex2d[t][s][0] = s*255/(SIZE-1);
139	    tex2d[t][s][1] = t*255/(SIZE-1);
140	    tex2d[t][s][2] = (x) ? 0 : 128;
141	    tex2d[t][s][3] = 0xff;
142         }
143      }
144   }
145#else
146   tex2d[0][0][0] = 0;
147   tex2d[0][0][1] = 255;
148   tex2d[0][0][2] = 255;
149   tex2d[0][0][3] = 0;
150
151   tex2d[0][1][0] = 0;
152   tex2d[0][1][1] = 0;
153   tex2d[0][1][2] = 255;
154   tex2d[0][1][3] = 255;
155
156   tex2d[1][0][0] = 255;
157   tex2d[1][0][1] = 255;
158   tex2d[1][0][2] = 0;
159   tex2d[1][0][3] = 255;
160
161   tex2d[1][1][0] = 255;
162   tex2d[1][1][1] = 0;
163   tex2d[1][1][2] = 0;
164   tex2d[1][1][3] = 255;
165#endif
166
167   texture = graw_util_create_tex2d(&info, SIZE, SIZE,
168                                    PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
169
170   sv = graw_util_create_simple_sampler_view(&info, texture);
171   info.ctx->set_sampler_views(info.ctx, PIPE_SHADER_FRAGMENT, 0, 1, 0, false, &sv);
172
173   sampler = graw_util_create_simple_sampler(&info,
174                                             PIPE_TEX_WRAP_REPEAT,
175                                             PIPE_TEX_FILTER_NEAREST);
176   info.ctx->bind_sampler_states(info.ctx, PIPE_SHADER_FRAGMENT,
177                                 0, 1, &sampler);
178}
179
180
181static void init( void )
182{
183   if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
184      exit(1);
185
186   graw_util_default_state(&info, FALSE);
187
188   {
189      struct pipe_rasterizer_state rasterizer;
190      void *handle;
191      memset(&rasterizer, 0, sizeof rasterizer);
192      rasterizer.cull_face = PIPE_FACE_NONE;
193      rasterizer.half_pixel_center = 1;
194      rasterizer.bottom_edge_rule = 1;
195      rasterizer.depth_clip_near = 1;
196      rasterizer.depth_clip_far = 1;
197      handle = info.ctx->create_rasterizer_state(info.ctx, &rasterizer);
198      info.ctx->bind_rasterizer_state(info.ctx, handle);
199   }
200
201   graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 1000);
202
203   init_tex();
204
205   set_vertices();
206   set_vertex_shader();
207   set_fragment_shader();
208}
209
210
211static void args(int argc, char *argv[])
212{
213   int i;
214
215   for (i = 1; i < argc;) {
216      if (graw_parse_args(&i, argc, argv)) {
217         continue;
218      }
219      exit(1);
220   }
221}
222
223int main( int argc, char *argv[] )
224{
225   args(argc, argv);
226   init();
227
228   graw_set_display_func( draw );
229   graw_main_loop();
230   return 0;
231}
232