1 /* Display a cleared blue window. This demo has no dependencies on
2 * any utility code, just the graw interface and gallium.
6 #include "state_tracker/graw.h"
7 #include "pipe/p_screen.h"
8 #include "pipe/p_context.h"
9 #include "pipe/p_state.h"
10 #include "pipe/p_defines.h"
12 #include "util/u_memory.h" /* Offset() */
13 #include "util/u_draw_quad.h"
15 enum pipe_format formats
[] = {
16 PIPE_FORMAT_R8G8B8A8_UNORM
,
17 PIPE_FORMAT_B8G8R8A8_UNORM
,
21 static const int WIDTH
= 300;
22 static const int HEIGHT
= 300;
24 static struct pipe_screen
*screen
= NULL
;
25 static struct pipe_context
*ctx
= NULL
;
26 static struct pipe_surface
*surf
= NULL
;
27 static struct pipe_resource
*tex
= NULL
;
28 static void *window
= NULL
;
35 static struct vertex vertices
[4] =
37 { { 0.0f
, -0.9f
, 0.0f
, 1.0f
},
38 { 1.0f
, 0.0f
, 0.0f
, 1.0f
}
40 { { -0.9f
, 0.9f
, 0.0f
, 1.0f
},
41 { 0.0f
, 1.0f
, 0.0f
, 1.0f
}
43 { { 0.9f
, 0.9f
, 0.0f
, 1.0f
},
44 { 0.0f
, 0.0f
, 1.0f
, 1.0f
}
51 static void set_viewport( float x
, float y
,
52 float width
, float height
,
53 float near
, float far
)
56 float half_width
= (float)width
/ 2.0f
;
57 float half_height
= (float)height
/ 2.0f
;
58 float half_depth
= ((float)far
- (float)near
) / 2.0f
;
59 struct pipe_viewport_state vp
;
61 vp
.scale
[0] = half_width
;
62 vp
.scale
[1] = half_height
;
63 vp
.scale
[2] = half_depth
;
66 vp
.translate
[0] = half_width
+ x
;
67 vp
.translate
[1] = half_height
+ y
;
68 vp
.translate
[2] = half_depth
+ z
;
69 vp
.translate
[3] = 0.0f
;
71 ctx
->set_viewport_state( ctx
, &vp
);
74 static void set_vertices( void )
76 struct pipe_vertex_element ve
[2];
77 struct pipe_vertex_buffer vbuf
;
80 memset(ve
, 0, sizeof ve
);
82 ve
[0].src_offset
= Offset(struct vertex
, position
);
83 ve
[0].src_format
= PIPE_FORMAT_R32G32B32A32_FLOAT
;
84 ve
[1].src_offset
= Offset(struct vertex
, color
);
85 ve
[1].src_format
= PIPE_FORMAT_R32G32B32A32_FLOAT
;
87 handle
= ctx
->create_vertex_elements_state(ctx
, 2, ve
);
88 ctx
->bind_vertex_elements_state(ctx
, handle
);
91 vbuf
.stride
= sizeof( struct vertex
);
92 vbuf
.buffer_offset
= 0;
93 vbuf
.buffer
= screen
->user_buffer_create(screen
,
96 PIPE_BIND_VERTEX_BUFFER
);
98 ctx
->set_vertex_buffers(ctx
, 1, &vbuf
);
101 static void set_vertex_shader( void )
108 "DCL OUT[0], POSITION\n"
109 "DCL OUT[1], COLOR\n"
110 " 0: MOV OUT[1], IN[1]\n"
111 " 1: MOV OUT[0], IN[0]\n"
114 handle
= graw_parse_vertex_shader(ctx
, text
);
115 ctx
->bind_vs_state(ctx
, handle
);
118 static void set_fragment_shader( void )
123 "DCL IN[0], COLOR, LINEAR\n"
124 "DCL OUT[0], COLOR\n"
125 " 0: MOV OUT[0], IN[0]\n"
128 handle
= graw_parse_fragment_shader(ctx
, text
);
129 ctx
->bind_fs_state(ctx
, handle
);
133 static void set_geometry_shader( void )
138 "PROPERTY GS_INPUT_PRIMITIVE TRIANGLES\n"
139 "PROPERTY GS_OUTPUT_PRIMITIVE TRIANGLE_STRIP\n"
140 "DCL IN[][0], POSITION, CONSTANT\n"
141 "DCL IN[][1], COLOR, CONSTANT\n"
142 "DCL OUT[0], POSITION, CONSTANT\n"
143 "DCL OUT[1], COLOR, CONSTANT\n"
144 "0:MOV OUT[0], IN[0][0]\n"
145 "1:MOV OUT[1], IN[0][1]\n"
147 "3:MOV OUT[0], IN[1][0]\n"
148 "4:MOV OUT[1], IN[0][1]\n" /* copy color from input vertex 0 */
150 "6:MOV OUT[0], IN[2][0]\n"
151 "7:MOV OUT[1], IN[2][1]\n"
156 handle
= graw_parse_geometry_shader(ctx
, text
);
157 ctx
->bind_gs_state(ctx
, handle
);
160 static void draw( void )
162 float clear_color
[4] = {1,0,1,1};
164 ctx
->clear(ctx
, PIPE_CLEAR_COLOR
, clear_color
, 0, 0);
165 util_draw_arrays(ctx
, PIPE_PRIM_TRIANGLES
, 0, 3);
166 ctx
->flush(ctx
, NULL
);
168 screen
->flush_frontbuffer(screen
, tex
, 0, 0, window
);
172 static void init( void )
174 struct pipe_framebuffer_state fb
;
175 struct pipe_resource templat
;
176 struct pipe_surface surf_tmpl
;
179 /* It's hard to say whether window or screen should be created
180 * first. Different environments would prefer one or the other.
182 * Also, no easy way of querying supported formats if the screen
183 * cannot be created first.
185 for (i
= 0; formats
[i
] != PIPE_FORMAT_NONE
; i
++) {
186 screen
= graw_create_window_and_screen(0, 0, 300, 300,
189 if (window
&& screen
)
192 if (!screen
|| !window
) {
193 fprintf(stderr
, "Unable to create window\n");
197 ctx
= screen
->context_create(screen
, NULL
);
201 templat
.target
= PIPE_TEXTURE_2D
;
202 templat
.format
= formats
[i
];
203 templat
.width0
= WIDTH
;
204 templat
.height0
= HEIGHT
;
206 templat
.array_size
= 1;
207 templat
.last_level
= 0;
208 templat
.nr_samples
= 1;
209 templat
.bind
= (PIPE_BIND_RENDER_TARGET
|
210 PIPE_BIND_DISPLAY_TARGET
);
212 tex
= screen
->resource_create(screen
,
217 surf_tmpl
.format
= templat
.format
;
218 surf_tmpl
.usage
= PIPE_BIND_RENDER_TARGET
;
219 surf_tmpl
.u
.tex
.level
= 0;
220 surf_tmpl
.u
.tex
.first_layer
= 0;
221 surf_tmpl
.u
.tex
.last_layer
= 0;
222 surf
= ctx
->create_surface(ctx
, tex
, &surf_tmpl
);
226 memset(&fb
, 0, sizeof fb
);
232 ctx
->set_framebuffer_state(ctx
, &fb
);
235 struct pipe_blend_state blend
;
237 memset(&blend
, 0, sizeof blend
);
238 blend
.rt
[0].colormask
= PIPE_MASK_RGBA
;
239 handle
= ctx
->create_blend_state(ctx
, &blend
);
240 ctx
->bind_blend_state(ctx
, handle
);
244 struct pipe_depth_stencil_alpha_state depthstencil
;
246 memset(&depthstencil
, 0, sizeof depthstencil
);
247 handle
= ctx
->create_depth_stencil_alpha_state(ctx
, &depthstencil
);
248 ctx
->bind_depth_stencil_alpha_state(ctx
, handle
);
252 struct pipe_rasterizer_state rasterizer
;
254 memset(&rasterizer
, 0, sizeof rasterizer
);
255 rasterizer
.cull_face
= PIPE_FACE_NONE
;
256 rasterizer
.gl_rasterization_rules
= 1;
257 handle
= ctx
->create_rasterizer_state(ctx
, &rasterizer
);
258 ctx
->bind_rasterizer_state(ctx
, handle
);
261 set_viewport(0, 0, WIDTH
, HEIGHT
, 30, 1000);
264 set_fragment_shader();
265 set_geometry_shader();
269 int main( int argc
, char *argv
[] )
273 graw_set_display_func( draw
);