1 /* Display a cleared blue window. This demo has no dependencies on
2 * any utility code, just the graw interface and gallium.
7 #include "state_tracker/graw.h"
8 #include "pipe/p_screen.h"
9 #include "pipe/p_context.h"
10 #include "pipe/p_state.h"
11 #include "pipe/p_defines.h"
13 #include "util/u_memory.h" /* Offset() */
14 #include "util/u_draw_quad.h"
16 enum pipe_format formats
[] = {
17 PIPE_FORMAT_R8G8B8A8_UNORM
,
18 PIPE_FORMAT_B8G8R8A8_UNORM
,
22 static const int WIDTH
= 300;
23 static const int HEIGHT
= 300;
25 static struct pipe_screen
*screen
= NULL
;
26 static struct pipe_context
*ctx
= NULL
;
27 static struct pipe_surface
*surf
= NULL
;
28 static struct pipe_resource
*tex
= NULL
;
29 static void *window
= NULL
;
36 static struct vertex vertices
[3] =
39 { 0.0f
, -0.9f
, 0.0f
, 1.0f
},
40 { 1.0f
, 0.0f
, 0.0f
, 1.0f
}
43 { -0.9f
, 0.9f
, 0.0f
, 1.0f
},
44 { 0.0f
, 1.0f
, 0.0f
, 1.0f
}
47 { 0.9f
, 0.9f
, 0.0f
, 1.0f
},
48 { 0.0f
, 0.0f
, 1.0f
, 1.0f
}
55 static void set_viewport( float x
, float y
,
56 float width
, float height
,
57 float near
, float far
)
60 float half_width
= (float)width
/ 2.0f
;
61 float half_height
= (float)height
/ 2.0f
;
62 float half_depth
= ((float)far
- (float)near
) / 2.0f
;
63 struct pipe_viewport_state vp
;
65 vp
.scale
[0] = half_width
;
66 vp
.scale
[1] = half_height
;
67 vp
.scale
[2] = half_depth
;
70 vp
.translate
[0] = half_width
+ x
;
71 vp
.translate
[1] = half_height
+ y
;
72 vp
.translate
[2] = half_depth
+ z
;
73 vp
.translate
[3] = 0.0f
;
75 ctx
->set_viewport_state( ctx
, &vp
);
78 static void set_vertices( void )
80 struct pipe_vertex_element ve
[2];
81 struct pipe_vertex_buffer vbuf
;
84 memset(ve
, 0, sizeof ve
);
86 ve
[0].src_offset
= Offset(struct vertex
, position
);
87 ve
[0].src_format
= PIPE_FORMAT_R32G32B32A32_FLOAT
;
88 ve
[1].src_offset
= Offset(struct vertex
, color
);
89 ve
[1].src_format
= PIPE_FORMAT_R32G32B32A32_FLOAT
;
91 handle
= ctx
->create_vertex_elements_state(ctx
, 2, ve
);
92 ctx
->bind_vertex_elements_state(ctx
, handle
);
95 vbuf
.stride
= sizeof( struct vertex
);
96 vbuf
.buffer_offset
= 0;
97 vbuf
.buffer
= screen
->user_buffer_create(screen
,
100 PIPE_BIND_VERTEX_BUFFER
);
102 ctx
->set_vertex_buffers(ctx
, 1, &vbuf
);
105 static void set_vertex_shader( void )
112 "DCL OUT[0], POSITION\n"
113 "DCL OUT[1], COLOR\n"
114 " 0: MOV OUT[1], IN[1]\n"
115 " 1: MOV OUT[0], IN[0]\n"
118 handle
= graw_parse_vertex_shader(ctx
, text
);
119 ctx
->bind_vs_state(ctx
, handle
);
122 static void set_fragment_shader( void )
127 "DCL IN[0], COLOR, LINEAR\n"
128 "DCL OUT[0], COLOR\n"
129 " 0: MOV OUT[0], IN[0]\n"
132 handle
= graw_parse_fragment_shader(ctx
, text
);
133 ctx
->bind_fs_state(ctx
, handle
);
137 static void draw( void )
139 union pipe_color_union clear_color
= { {1,0,1,1} };
141 ctx
->clear(ctx
, PIPE_CLEAR_COLOR
, &clear_color
, 0, 0);
142 util_draw_arrays(ctx
, PIPE_PRIM_TRIANGLES
, 0, 3);
143 ctx
->flush(ctx
, NULL
);
145 graw_save_surface_to_file(ctx
, surf
, NULL
);
147 screen
->flush_frontbuffer(screen
, tex
, 0, 0, window
);
151 static void init( void )
153 struct pipe_framebuffer_state fb
;
154 struct pipe_resource templat
;
155 struct pipe_surface surf_tmpl
;
158 /* It's hard to say whether window or screen should be created
159 * first. Different environments would prefer one or the other.
161 * Also, no easy way of querying supported formats if the screen
162 * cannot be created first.
164 for (i
= 0; formats
[i
] != PIPE_FORMAT_NONE
; i
++) {
165 screen
= graw_create_window_and_screen(0, 0, 300, 300,
168 if (window
&& screen
)
171 if (!screen
|| !window
) {
172 fprintf(stderr
, "Unable to create window\n");
176 ctx
= screen
->context_create(screen
, NULL
);
178 fprintf(stderr
, "Unable to create context!\n");
182 templat
.target
= PIPE_TEXTURE_2D
;
183 templat
.format
= formats
[i
];
184 templat
.width0
= WIDTH
;
185 templat
.height0
= HEIGHT
;
187 templat
.array_size
= 1;
188 templat
.last_level
= 0;
189 templat
.nr_samples
= 1;
190 templat
.bind
= (PIPE_BIND_RENDER_TARGET
|
191 PIPE_BIND_DISPLAY_TARGET
);
193 tex
= screen
->resource_create(screen
,
196 fprintf(stderr
, "Unable to create screen texture!\n");
200 surf_tmpl
.format
= templat
.format
;
201 surf_tmpl
.usage
= PIPE_BIND_RENDER_TARGET
;
202 surf_tmpl
.u
.tex
.level
= 0;
203 surf_tmpl
.u
.tex
.first_layer
= 0;
204 surf_tmpl
.u
.tex
.last_layer
= 0;
205 surf
= ctx
->create_surface(ctx
, tex
, &surf_tmpl
);
207 fprintf(stderr
, "Unable to create tex surface!\n");
211 memset(&fb
, 0, sizeof fb
);
217 ctx
->set_framebuffer_state(ctx
, &fb
);
220 struct pipe_blend_state blend
;
222 memset(&blend
, 0, sizeof blend
);
223 blend
.rt
[0].colormask
= PIPE_MASK_RGBA
;
224 handle
= ctx
->create_blend_state(ctx
, &blend
);
225 ctx
->bind_blend_state(ctx
, handle
);
229 struct pipe_depth_stencil_alpha_state depthstencil
;
231 memset(&depthstencil
, 0, sizeof depthstencil
);
232 handle
= ctx
->create_depth_stencil_alpha_state(ctx
, &depthstencil
);
233 ctx
->bind_depth_stencil_alpha_state(ctx
, handle
);
237 struct pipe_rasterizer_state rasterizer
;
239 memset(&rasterizer
, 0, sizeof rasterizer
);
240 rasterizer
.cull_face
= PIPE_FACE_NONE
;
241 rasterizer
.gl_rasterization_rules
= 1;
242 rasterizer
.depth_clip
= 1;
243 handle
= ctx
->create_rasterizer_state(ctx
, &rasterizer
);
244 ctx
->bind_rasterizer_state(ctx
, handle
);
247 set_viewport(0, 0, WIDTH
, HEIGHT
, 30, 1000);
250 set_fragment_shader();
253 static void args(int argc
, char *argv
[])
257 for (i
= 1; i
< argc
;) {
258 if (graw_parse_args(&i
, argc
, argv
)) {
265 int main( int argc
, char *argv
[] )
270 graw_set_display_func( draw
);