quad-tex.c revision af69d88d 
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 = 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, &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      "  0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
96      "  1: MOV OUT[0], TEMP[0]\n"
97      "  2: END\n";
98
99   handle = graw_parse_fragment_shader(info.ctx, text);
100   info.ctx->bind_fs_state(info.ctx, handle);
101}
102
103
104static void draw( void )
105{
106   union pipe_color_union clear_color = { {.5,.5,.5,1} };
107
108   info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
109   util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
110   info.ctx->flush(info.ctx, NULL, 0);
111
112   graw_save_surface_to_file(info.ctx, info.color_surf[0], NULL);
113
114   graw_util_flush_front(&info);
115}
116
117
118#define SIZE 16
119
120static void init_tex( void )
121{
122   ubyte tex2d[SIZE][SIZE][4];
123   int s, t;
124
125#if (SIZE != 2)
126   for (s = 0; s < SIZE; s++) {
127      for (t = 0; t < SIZE; t++) {
128         if (0) {
129            int x = (s ^ t) & 1;
130	    tex2d[t][s][0] = (x) ? 0 : 63;
131	    tex2d[t][s][1] = (x) ? 0 : 128;
132	    tex2d[t][s][2] = 0;
133	    tex2d[t][s][3] = 0xff;
134         }
135         else {
136            int x = ((s ^ t) >> 2) & 1;
137	    tex2d[t][s][0] = s*255/(SIZE-1);
138	    tex2d[t][s][1] = t*255/(SIZE-1);
139	    tex2d[t][s][2] = (x) ? 0 : 128;
140	    tex2d[t][s][3] = 0xff;
141         }
142      }
143   }
144#else
145   tex2d[0][0][0] = 0;
146   tex2d[0][0][1] = 255;
147   tex2d[0][0][2] = 255;
148   tex2d[0][0][3] = 0;
149
150   tex2d[0][1][0] = 0;
151   tex2d[0][1][1] = 0;
152   tex2d[0][1][2] = 255;
153   tex2d[0][1][3] = 255;
154
155   tex2d[1][0][0] = 255;
156   tex2d[1][0][1] = 255;
157   tex2d[1][0][2] = 0;
158   tex2d[1][0][3] = 255;
159
160   tex2d[1][1][0] = 255;
161   tex2d[1][1][1] = 0;
162   tex2d[1][1][2] = 0;
163   tex2d[1][1][3] = 255;
164#endif
165
166   texture = graw_util_create_tex2d(&info, SIZE, SIZE,
167                                    PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
168
169   sv = graw_util_create_simple_sampler_view(&info, texture);
170   info.ctx->set_sampler_views(info.ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv);
171
172   sampler = graw_util_create_simple_sampler(&info,
173                                             PIPE_TEX_WRAP_REPEAT,
174                                             PIPE_TEX_FILTER_NEAREST);
175   info.ctx->bind_sampler_states(info.ctx, PIPE_SHADER_FRAGMENT,
176                                 0, 1, &sampler);
177}
178
179
180static void init( void )
181{
182   if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
183      exit(1);
184
185   graw_util_default_state(&info, FALSE);
186
187   {
188      struct pipe_rasterizer_state rasterizer;
189      void *handle;
190      memset(&rasterizer, 0, sizeof rasterizer);
191      rasterizer.cull_face = PIPE_FACE_NONE;
192      rasterizer.half_pixel_center = 1;
193      rasterizer.bottom_edge_rule = 1;
194      rasterizer.depth_clip = 1;
195      handle = info.ctx->create_rasterizer_state(info.ctx, &rasterizer);
196      info.ctx->bind_rasterizer_state(info.ctx, handle);
197   }
198
199   graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 1000);
200
201   init_tex();
202
203   set_vertices();
204   set_vertex_shader();
205   set_fragment_shader();
206}
207
208
209static void args(int argc, char *argv[])
210{
211   int i;
212
213   for (i = 1; i < argc;) {
214      if (graw_parse_args(&i, argc, argv)) {
215         continue;
216      }
217      exit(1);
218   }
219}
220
221int main( int argc, char *argv[] )
222{
223   args(argc, argv);
224   init();
225
226   graw_set_display_func( draw );
227   graw_main_loop();
228   return 0;
229}
230