1 /* Test sRGB texturing.
2 */
3
4 #include "graw_util.h"
5
6
7 static const int WIDTH = 600;
8 static const int HEIGHT = 300;
9
10 static struct graw_info info;
11
12 static struct pipe_resource *texture;
13 static struct pipe_sampler_view *linear_sv, *srgb_sv;
14
15
16 struct vertex {
17 float position[4];
18 float color[4];
19 };
20
21 static struct vertex vertices1[] =
22 {
23 { { -0.1, -0.9, 0.0, 1.0 },
24 { 1, 1, 0, 1 } },
25
26 { { -0.1, 0.9, 0.0, 1.0 },
27 { 1, 0, 0, 1 } },
28
29 { {-0.9, 0.9, 0.0, 1.0 },
30 { 0, 0, 0, 1 } },
31
32 { {-0.9, -0.9, 0.0, 1.0 },
33 { 0, 1, 0, 1 } },
34 };
35
36
37 static struct vertex vertices2[] =
38 {
39 { { 0.9, -0.9, 0.0, 1.0 },
40 { 1, 1, 0, 1 } },
41
42 { { 0.9, 0.9, 0.0, 1.0 },
43 { 1, 0, 0, 1 } },
44
45 { { 0.1, 0.9, 0.0, 1.0 },
46 { 0, 0, 0, 1 } },
47
48 { { 0.1, -0.9, 0.0, 1.0 },
49 { 0, 1, 0, 1 } },
50 };
51
52
53
54
55 static void
set_vertices(struct vertex * verts,unsigned num_verts)56 set_vertices(struct vertex *verts, unsigned num_verts)
57 {
58 struct pipe_vertex_element ve[2];
59 struct pipe_vertex_buffer vbuf;
60 void *handle;
61
62 memset(ve, 0, sizeof ve);
63
64 ve[0].src_offset = Offset(struct vertex, position);
65 ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
66 ve[1].src_offset = Offset(struct vertex, color);
67 ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
68
69 handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
70 info.ctx->bind_vertex_elements_state(info.ctx, handle);
71
72
73 vbuf.stride = sizeof(struct vertex);
74 vbuf.buffer_offset = 0;
75 vbuf.buffer = pipe_buffer_create_with_data(info.ctx,
76 PIPE_BIND_VERTEX_BUFFER,
77 PIPE_USAGE_STATIC,
78 num_verts * sizeof(struct vertex),
79 verts);
80
81 info.ctx->set_vertex_buffers(info.ctx, 1, &vbuf);
82 }
83
set_vertex_shader(void)84 static void set_vertex_shader( void )
85 {
86 void *handle;
87 const char *text =
88 "VERT\n"
89 "DCL IN[0]\n"
90 "DCL IN[1]\n"
91 "DCL OUT[0], POSITION\n"
92 "DCL OUT[1], GENERIC[0]\n"
93 " 0: MOV OUT[1], IN[1]\n"
94 " 1: MOV OUT[0], IN[0]\n"
95 " 2: END\n";
96
97 handle = graw_parse_vertex_shader(info.ctx, text);
98 info.ctx->bind_vs_state(info.ctx, handle);
99 }
100
set_fragment_shader(void)101 static void set_fragment_shader( void )
102 {
103 void *handle;
104 const char *text =
105 "FRAG\n"
106 "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
107 "DCL OUT[0], COLOR\n"
108 "DCL TEMP[0]\n"
109 "DCL SAMP[0]\n"
110 " 0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
111 " 1: MOV OUT[0], TEMP[0]\n"
112 " 2: END\n";
113
114 handle = graw_parse_fragment_shader(info.ctx, text);
115 info.ctx->bind_fs_state(info.ctx, handle);
116 }
117
118
draw(void)119 static void draw( void )
120 {
121 union pipe_color_union clear_color;
122
123 clear_color.f[0] = 0.5;
124 clear_color.f[1] = 0.5;
125 clear_color.f[2] = 0.5;
126 clear_color.f[3] = 1.0;
127
128 info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
129
130 info.ctx->set_fragment_sampler_views(info.ctx, 1, &linear_sv);
131 set_vertices(vertices1, 4);
132 util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
133
134 info.ctx->set_fragment_sampler_views(info.ctx, 1, &srgb_sv);
135 set_vertices(vertices2, 4);
136 util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
137
138 info.ctx->flush(info.ctx, NULL);
139
140 graw_util_flush_front(&info);
141 }
142
143
init_tex(void)144 static void init_tex( void )
145 {
146 #define SIZE 64
147 ubyte tex2d[SIZE][SIZE][4];
148 int s, t;
149
150 for (s = 0; s < SIZE; s++) {
151 for (t = 0; t < SIZE; t++) {
152 tex2d[t][s][0] = 0;
153 tex2d[t][s][1] = s * 255 / SIZE;
154 tex2d[t][s][2] = t * 255 / SIZE;
155 tex2d[t][s][3] = 255;
156 }
157 }
158
159 texture = graw_util_create_tex2d(&info, SIZE, SIZE,
160 PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
161
162 {
163 void *sampler;
164 sampler = graw_util_create_simple_sampler(&info,
165 PIPE_TEX_WRAP_REPEAT,
166 PIPE_TEX_FILTER_NEAREST);
167 info.ctx->bind_fragment_sampler_states(info.ctx, 1, &sampler);
168 }
169
170 /* linear sampler view */
171 {
172 struct pipe_sampler_view sv_temp;
173 memset(&sv_temp, 0, sizeof sv_temp);
174 sv_temp.format = PIPE_FORMAT_B8G8R8A8_UNORM;
175 sv_temp.texture = texture;
176 sv_temp.swizzle_r = PIPE_SWIZZLE_RED;
177 sv_temp.swizzle_g = PIPE_SWIZZLE_GREEN;
178 sv_temp.swizzle_b = PIPE_SWIZZLE_BLUE;
179 sv_temp.swizzle_a = PIPE_SWIZZLE_ALPHA;
180 linear_sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_temp);
181 if (linear_sv == NULL)
182 exit(0);
183 }
184
185 /* srgb sampler view */
186 {
187 struct pipe_sampler_view sv_temp;
188 memset(&sv_temp, 0, sizeof sv_temp);
189 sv_temp.format = PIPE_FORMAT_B8G8R8A8_SRGB;
190 sv_temp.texture = texture;
191 sv_temp.swizzle_r = PIPE_SWIZZLE_RED;
192 sv_temp.swizzle_g = PIPE_SWIZZLE_GREEN;
193 sv_temp.swizzle_b = PIPE_SWIZZLE_BLUE;
194 sv_temp.swizzle_a = PIPE_SWIZZLE_ALPHA;
195 srgb_sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_temp);
196 if (srgb_sv == NULL)
197 exit(0);
198 }
199 #undef SIZE
200 }
201
init(void)202 static void init( void )
203 {
204 if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
205 exit(1);
206
207 graw_util_default_state(&info, FALSE);
208
209 graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 10000);
210
211 init_tex();
212
213 set_vertex_shader();
214 set_fragment_shader();
215 }
216
217
main(int argc,char * argv[])218 int main( int argc, char *argv[] )
219 {
220 init();
221
222 graw_set_display_func( draw );
223 graw_main_loop();
224 return 0;
225 }
226