0,0 → 1,171 |
/* Display a cleared blue window. This demo has no dependencies on |
* any utility code, just the graw interface and gallium. |
*/ |
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#include <stdio.h> |
#include "graw_util.h" |
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static struct graw_info info; |
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static const int WIDTH = 300; |
static const int HEIGHT = 300; |
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struct vertex { |
float position[4]; |
float color[4]; |
}; |
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static boolean FlatShade = FALSE; |
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static struct vertex vertices[3] = |
{ |
{ |
{ 0.0f, -0.9f, 0.0f, 1.0f }, |
{ 1.0f, 0.0f, 0.0f, 1.0f } |
}, |
{ |
{ -0.9f, 0.9f, 0.0f, 1.0f }, |
{ 0.0f, 1.0f, 0.0f, 1.0f } |
}, |
{ |
{ 0.9f, 0.9f, 0.0f, 1.0f }, |
{ 0.0f, 0.0f, 1.0f, 1.0f } |
} |
}; |
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static void set_vertices( void ) |
{ |
struct pipe_vertex_element ve[2]; |
struct pipe_vertex_buffer vbuf; |
void *handle; |
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memset(ve, 0, sizeof ve); |
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ve[0].src_offset = Offset(struct vertex, position); |
ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
ve[1].src_offset = Offset(struct vertex, color); |
ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; |
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handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve); |
info.ctx->bind_vertex_elements_state(info.ctx, handle); |
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memset(&vbuf, 0, sizeof vbuf); |
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vbuf.stride = sizeof( struct vertex ); |
vbuf.buffer_offset = 0; |
vbuf.buffer = pipe_buffer_create_with_data(info.ctx, |
PIPE_BIND_VERTEX_BUFFER, |
PIPE_USAGE_STATIC, |
sizeof(vertices), |
vertices); |
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info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf); |
} |
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static void set_vertex_shader( void ) |
{ |
void *handle; |
const char *text = |
"VERT\n" |
"DCL IN[0]\n" |
"DCL IN[1]\n" |
"DCL OUT[0], POSITION\n" |
"DCL OUT[1], COLOR\n" |
" 0: MOV OUT[1], IN[1]\n" |
" 1: MOV OUT[0], IN[0]\n" |
" 2: END\n"; |
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handle = graw_parse_vertex_shader(info.ctx, text); |
info.ctx->bind_vs_state(info.ctx, handle); |
} |
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static void set_fragment_shader( void ) |
{ |
void *handle; |
const char *text = |
"FRAG\n" |
"DCL IN[0], COLOR, LINEAR\n" |
"DCL OUT[0], COLOR\n" |
" 0: MOV OUT[0], IN[0]\n" |
" 1: END\n"; |
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handle = graw_parse_fragment_shader(info.ctx, text); |
info.ctx->bind_fs_state(info.ctx, handle); |
} |
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static void draw( void ) |
{ |
union pipe_color_union clear_color = { {1,0,1,1} }; |
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info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0); |
util_draw_arrays(info.ctx, PIPE_PRIM_TRIANGLES, 0, 3); |
info.ctx->flush(info.ctx, NULL, 0); |
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graw_save_surface_to_file(info.ctx, info.color_surf[0], NULL); |
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graw_util_flush_front(&info); |
} |
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static void init( void ) |
{ |
if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE)) |
exit(1); |
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graw_util_default_state(&info, FALSE); |
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{ |
struct pipe_rasterizer_state rasterizer; |
void *handle; |
memset(&rasterizer, 0, sizeof rasterizer); |
rasterizer.cull_face = PIPE_FACE_NONE; |
rasterizer.half_pixel_center = 1; |
rasterizer.bottom_edge_rule = 1; |
rasterizer.flatshade = FlatShade; |
rasterizer.depth_clip = 1; |
handle = info.ctx->create_rasterizer_state(info.ctx, &rasterizer); |
info.ctx->bind_rasterizer_state(info.ctx, handle); |
} |
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graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 1000); |
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set_vertices(); |
set_vertex_shader(); |
set_fragment_shader(); |
} |
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static void args(int argc, char *argv[]) |
{ |
int i; |
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for (i = 1; i < argc; ) { |
if (graw_parse_args(&i, argc, argv)) { |
/* ok */ |
} |
else if (strcmp(argv[i], "-f") == 0) { |
FlatShade = TRUE; |
i++; |
} |
else { |
printf("Invalid arg %s\n", argv[i]); |
exit(1); |
} |
} |
} |
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int main( int argc, char *argv[] ) |
{ |
args(argc, argv); |
init(); |
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graw_set_display_func( draw ); |
graw_main_loop(); |
return 0; |
} |