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
57   vbuf.stride = sizeof( struct vertex );
58   vbuf.buffer_offset = 0;
59   vbuf.buffer = pipe_buffer_create_with_data(info.ctx,
60                                              PIPE_BIND_VERTEX_BUFFER,
61                                              PIPE_USAGE_STATIC,
62                                              sizeof(vertices),
63                                              vertices);
64
65   info.ctx->set_vertex_buffers(info.ctx, 1, &vbuf);
66}
67
68static void set_vertex_shader( void )
69{
70   void *handle;
71   const char *text =
72      "VERT\n"
73      "DCL IN[0]\n"
74      "DCL IN[1]\n"
75      "DCL OUT[0], POSITION\n"
76      "DCL OUT[1], GENERIC[0]\n"
77      "  0: MOV OUT[1], IN[1]\n"
78      "  1: MOV OUT[0], IN[0]\n"
79      "  2: END\n";
80
81   handle = graw_parse_vertex_shader(info.ctx, text);
82   info.ctx->bind_vs_state(info.ctx, handle);
83}
84
85static void set_fragment_shader( void )
86{
87   void *handle;
88   const char *text =
89      "FRAG\n"
90      "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
91      "DCL OUT[0], COLOR\n"
92      "DCL TEMP[0]\n"
93      "DCL SAMP[0]\n"
94      "  0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
95      "  1: MOV OUT[0], TEMP[0]\n"
96      "  2: END\n";
97
98   handle = graw_parse_fragment_shader(info.ctx, text);
99   info.ctx->bind_fs_state(info.ctx, handle);
100}
101
102
103static void draw( void )
104{
105   union pipe_color_union clear_color = { {.5,.5,.5,1} };
106
107   info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
108   util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
109   info.ctx->flush(info.ctx, NULL);
110
111   graw_save_surface_to_file(info.ctx, info.color_surf[0], NULL);
112
113   graw_util_flush_front(&info);
114}
115
116
117#define SIZE 16
118
119static void init_tex( void )
120{
121   ubyte tex2d[SIZE][SIZE][4];
122   int s, t;
123
124#if (SIZE != 2)
125   for (s = 0; s < SIZE; s++) {
126      for (t = 0; t < SIZE; t++) {
127         if (0) {
128            int x = (s ^ t) & 1;
129	    tex2d[t][s][0] = (x) ? 0 : 63;
130	    tex2d[t][s][1] = (x) ? 0 : 128;
131	    tex2d[t][s][2] = 0;
132	    tex2d[t][s][3] = 0xff;
133         }
134         else {
135            int x = ((s ^ t) >> 2) & 1;
136	    tex2d[t][s][0] = s*255/(SIZE-1);
137	    tex2d[t][s][1] = t*255/(SIZE-1);
138	    tex2d[t][s][2] = (x) ? 0 : 128;
139	    tex2d[t][s][3] = 0xff;
140         }
141      }
142   }
143#else
144   tex2d[0][0][0] = 0;
145   tex2d[0][0][1] = 255;
146   tex2d[0][0][2] = 255;
147   tex2d[0][0][3] = 0;
148
149   tex2d[0][1][0] = 0;
150   tex2d[0][1][1] = 0;
151   tex2d[0][1][2] = 255;
152   tex2d[0][1][3] = 255;
153
154   tex2d[1][0][0] = 255;
155   tex2d[1][0][1] = 255;
156   tex2d[1][0][2] = 0;
157   tex2d[1][0][3] = 255;
158
159   tex2d[1][1][0] = 255;
160   tex2d[1][1][1] = 0;
161   tex2d[1][1][2] = 0;
162   tex2d[1][1][3] = 255;
163#endif
164
165   texture = graw_util_create_tex2d(&info, SIZE, SIZE,
166                                    PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
167
168   sv = graw_util_create_simple_sampler_view(&info, texture);
169   info.ctx->set_fragment_sampler_views(info.ctx, 1, &sv);
170
171   sampler = graw_util_create_simple_sampler(&info,
172                                             PIPE_TEX_WRAP_REPEAT,
173                                             PIPE_TEX_FILTER_NEAREST);
174   info.ctx->bind_fragment_sampler_states(info.ctx, 1, &sampler);
175}
176
177
178static void init( void )
179{
180   if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
181      exit(1);
182
183   graw_util_default_state(&info, FALSE);
184
185   {
186      struct pipe_rasterizer_state rasterizer;
187      void *handle;
188      memset(&rasterizer, 0, sizeof rasterizer);
189      rasterizer.cull_face = PIPE_FACE_NONE;
190      rasterizer.gl_rasterization_rules = 1;
191      rasterizer.depth_clip = 1;
192      handle = info.ctx->create_rasterizer_state(info.ctx, &rasterizer);
193      info.ctx->bind_rasterizer_state(info.ctx, handle);
194   }
195
196   graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 1000);
197
198   init_tex();
199
200   set_vertices();
201   set_vertex_shader();
202   set_fragment_shader();
203}
204
205
206static void args(int argc, char *argv[])
207{
208   int i;
209
210   for (i = 1; i < argc;) {
211      if (graw_parse_args(&i, argc, argv)) {
212         continue;
213      }
214      exit(1);
215   }
216}
217
218int main( int argc, char *argv[] )
219{
220   args(argc, argv);
221   init();
222
223   graw_set_display_func( draw );
224   graw_main_loop();
225   return 0;
226}
227