1 /* Test the TGSI_SEMANTIC_FACE fragment shader input.
9 static int width
= 300;
10 static int height
= 300;
12 static struct graw_info info
;
23 static struct vertex vertices
[] =
25 /* left quad: clock-wise, front-facing, red */
27 {-0.8, -0.9, z0
, 1.0 },
32 { -0.2, -0.9, z0
, 1.0 },
37 { 0.2, 0.9, z01
, 1.0 },
42 {-0.9, 0.9, z01
, 1.0 },
46 /* right quad : counter-clock-wise, back-facing, green */
48 { 0.2, -0.9, z1
, 1.0 },
53 { -0.2, 0.8, z1
, 1.0 },
58 { 0.9, 0.8, z1
, 1.0 },
63 { 0.8, -0.9, z1
, 1.0 },
68 #define NUM_VERTS (sizeof(vertices) / sizeof(vertices[0]))
75 struct pipe_vertex_element ve
[2];
76 struct pipe_vertex_buffer vbuf
;
79 memset(ve
, 0, sizeof ve
);
81 ve
[0].src_offset
= Offset(struct vertex
, position
);
82 ve
[0].src_format
= PIPE_FORMAT_R32G32B32A32_FLOAT
;
83 ve
[1].src_offset
= Offset(struct vertex
, color
);
84 ve
[1].src_format
= PIPE_FORMAT_R32G32B32A32_FLOAT
;
86 handle
= info
.ctx
->create_vertex_elements_state(info
.ctx
, 2, ve
);
87 info
.ctx
->bind_vertex_elements_state(info
.ctx
, handle
);
90 vbuf
.stride
= sizeof(struct vertex
);
91 vbuf
.buffer_offset
= 0;
92 vbuf
.buffer
= info
.screen
->user_buffer_create(info
.screen
,
95 PIPE_BIND_VERTEX_BUFFER
);
97 info
.ctx
->set_vertex_buffers(info
.ctx
, 1, &vbuf
);
102 set_vertex_shader(void)
109 "DCL OUT[0], POSITION\n"
110 "DCL OUT[1], GENERIC[0]\n"
111 " 0: MOV OUT[0], IN[0]\n"
112 " 1: MOV OUT[1], IN[1]\n"
115 handle
= graw_parse_vertex_shader(info
.ctx
, text
);
116 info
.ctx
->bind_vs_state(info
.ctx
, handle
);
121 set_fragment_shader(void)
126 "DCL IN[0], FACE, CONSTANT\n"
127 "DCL IN[1], GENERIC, CONSTANT\n"
128 "DCL OUT[0], COLOR\n"
130 "IMM FLT32 { 1.0, 0.0, 0.0, 0.0 }\n"
131 "IMM FLT32 { 0.0, 1.0, 0.0, 0.0 }\n"
132 "IMM FLT32 { 0.5, 0.6, 0.0, 0.0 }\n"
133 " 0: SGT TEMP[0].x, IN[0].xxxx, IMM[1].xxxx\n" /* TMP[0].x = IN[0].x > 0.0 */
134 " 1: IF TEMP[0].xxxx :4\n"
135 " 2: MOV OUT[0], IMM[0]\n" /* front-facing: red */
137 " 4: MOV OUT[0], IMM[1]\n" /* back-facing: green */
141 handle
= graw_parse_fragment_shader(info
.ctx
, text
);
142 info
.ctx
->bind_fs_state(info
.ctx
, handle
);
149 union pipe_color_union clear_color
;
151 clear_color
.f
[0] = 0.25;
152 clear_color
.f
[1] = 0.25;
153 clear_color
.f
[2] = 0.25;
154 clear_color
.f
[3] = 1.00;
156 info
.ctx
->clear(info
.ctx
,
157 PIPE_CLEAR_COLOR
| PIPE_CLEAR_DEPTHSTENCIL
,
158 &clear_color
, 1.0, 0);
159 util_draw_arrays(info
.ctx
, PIPE_PRIM_QUADS
, 0, NUM_VERTS
);
160 info
.ctx
->flush(info
.ctx
, NULL
);
162 graw_util_flush_front(&info
);
173 set_viewport(0, 0, width
, height
, 30, 1000);
181 if (!graw_util_create_window(&info
, width
, height
, 1, TRUE
))
184 graw_util_default_state(&info
, TRUE
);
186 graw_util_viewport(&info
, 0, 0, width
, height
, -1.0, 1.0);
190 set_fragment_shader();
195 main(int argc
, char *argv
[])
199 printf("Left quad: clock-wise, front-facing, red\n");
200 printf("Right quad: counter clock-wise, back-facing, green\n");
202 graw_set_display_func(draw
);
203 /*graw_set_reshape_func(resize);*/