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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    memset(&vbuf, 0, sizeof vbuf);
73 
74    vbuf.stride = sizeof(struct vertex);
75    vbuf.buffer_offset = 0;
76    vbuf.buffer.resource = pipe_buffer_create_with_data(info.ctx,
77                                               PIPE_BIND_VERTEX_BUFFER,
78                                               PIPE_USAGE_DEFAULT,
79                                               num_verts * sizeof(struct vertex),
80                                               verts);
81 
82    info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf);
83 }
84 
set_vertex_shader(void)85 static void set_vertex_shader( void )
86 {
87    void *handle;
88    const char *text =
89       "VERT\n"
90       "DCL IN[0]\n"
91       "DCL IN[1]\n"
92       "DCL OUT[0], POSITION\n"
93       "DCL OUT[1], GENERIC[0]\n"
94       "  0: MOV OUT[1], IN[1]\n"
95       "  1: MOV OUT[0], IN[0]\n"
96       "  2: END\n";
97 
98    handle = graw_parse_vertex_shader(info.ctx, text);
99    info.ctx->bind_vs_state(info.ctx, handle);
100 }
101 
set_fragment_shader(void)102 static void set_fragment_shader( void )
103 {
104    void *handle;
105    const char *text =
106       "FRAG\n"
107       "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
108       "DCL OUT[0], COLOR\n"
109       "DCL TEMP[0]\n"
110       "DCL SAMP[0]\n"
111       "DCL SVIEW[0], 2D, FLOAT\n"
112       "  0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
113       "  1: MOV OUT[0], TEMP[0]\n"
114       "  2: END\n";
115 
116    handle = graw_parse_fragment_shader(info.ctx, text);
117    info.ctx->bind_fs_state(info.ctx, handle);
118 }
119 
120 
draw(void)121 static void draw( void )
122 {
123    union pipe_color_union clear_color;
124 
125    clear_color.f[0] = 0.5;
126    clear_color.f[1] = 0.5;
127    clear_color.f[2] = 0.5;
128    clear_color.f[3] = 1.0;
129 
130    info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, NULL, &clear_color, 0, 0);
131 
132    info.ctx->set_sampler_views(info.ctx, PIPE_SHADER_FRAGMENT, 0, 1, &linear_sv);
133    set_vertices(vertices1, 4);
134    util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
135 
136    info.ctx->set_sampler_views(info.ctx, PIPE_SHADER_FRAGMENT, 0, 1, &srgb_sv);
137    set_vertices(vertices2, 4);
138    util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
139 
140    info.ctx->flush(info.ctx, NULL, 0);
141 
142    graw_util_flush_front(&info);
143 }
144 
145 
init_tex(void)146 static void init_tex( void )
147 {
148 #define SIZE 64
149    ubyte tex2d[SIZE][SIZE][4];
150    int s, t;
151 
152    for (s = 0; s < SIZE; s++) {
153       for (t = 0; t < SIZE; t++) {
154          tex2d[t][s][0] = 0;
155          tex2d[t][s][1] = s * 255 / SIZE;
156          tex2d[t][s][2] = t * 255 / SIZE;
157          tex2d[t][s][3] = 255;
158       }
159    }
160 
161    texture = graw_util_create_tex2d(&info, SIZE, SIZE,
162                                     PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
163 
164    {
165       void *sampler;
166       sampler = graw_util_create_simple_sampler(&info,
167                                                 PIPE_TEX_WRAP_REPEAT,
168                                                 PIPE_TEX_FILTER_NEAREST);
169       info.ctx->bind_sampler_states(info.ctx, PIPE_SHADER_FRAGMENT,
170                                     0, 1, &sampler);
171    }
172 
173    /* linear sampler view */
174    {
175       struct pipe_sampler_view sv_temp;
176       memset(&sv_temp, 0, sizeof sv_temp);
177       sv_temp.format = PIPE_FORMAT_B8G8R8A8_UNORM;
178       sv_temp.texture = texture;
179       sv_temp.swizzle_r = PIPE_SWIZZLE_X;
180       sv_temp.swizzle_g = PIPE_SWIZZLE_Y;
181       sv_temp.swizzle_b = PIPE_SWIZZLE_Z;
182       sv_temp.swizzle_a = PIPE_SWIZZLE_W;
183       linear_sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_temp);
184       if (linear_sv == NULL)
185          exit(0);
186    }
187 
188    /* srgb sampler view */
189    {
190       struct pipe_sampler_view sv_temp;
191       memset(&sv_temp, 0, sizeof sv_temp);
192       sv_temp.format = PIPE_FORMAT_B8G8R8A8_SRGB;
193       sv_temp.texture = texture;
194       sv_temp.swizzle_r = PIPE_SWIZZLE_X;
195       sv_temp.swizzle_g = PIPE_SWIZZLE_Y;
196       sv_temp.swizzle_b = PIPE_SWIZZLE_Z;
197       sv_temp.swizzle_a = PIPE_SWIZZLE_W;
198       srgb_sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_temp);
199       if (srgb_sv == NULL)
200          exit(0);
201    }
202 #undef SIZE
203 }
204 
init(void)205 static void init( void )
206 {
207    if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
208       exit(1);
209 
210    graw_util_default_state(&info, FALSE);
211 
212    graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 10000);
213 
214    init_tex();
215 
216    set_vertex_shader();
217    set_fragment_shader();
218 }
219 
220 
main(int argc,char * argv[])221 int main( int argc, char *argv[] )
222 {
223    init();
224 
225    graw_set_display_func( draw );
226    graw_main_loop();
227    return 0;
228 }
229