0,0 → 1,261 |
/* Test the TGSI_SEMANTIC_POSITION fragment shader input. |
* Plus properties for upper-left vs. lower-left origin and |
* center integer vs. half-integer; |
*/ |
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#include <stdio.h> |
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#include "graw_util.h" |
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static int width = 300; |
static int height = 300; |
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static struct graw_info info; |
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struct vertex { |
float position[4]; |
float color[4]; |
}; |
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/* Note: the upper-left vertex is pushed to the left a bit to |
* make sure we can spot upside-down rendering. |
*/ |
static struct vertex vertices[] = |
{ |
{ |
{-0.95, -0.95, 0.5, 1.0 }, |
{ 0, 0, 0, 1 } |
}, |
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{ |
{ 0.85, -0.95, 0.5, 1.0 }, |
{ 0, 0, 0, 1 } |
}, |
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{ |
{ 0.95, 0.95, 0.5, 1.0 }, |
{ 0, 0, 0, 1 } |
}, |
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{ |
{-0.95, 0.95, 0.5, 1.0 }, |
{ 0, 0, 0, 1 } |
} |
}; |
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#define NUM_VERTS (sizeof(vertices) / sizeof(vertices[0])) |
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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], GENERIC[0]\n" |
" 0: MOV OUT[0], IN[0]\n" |
" 1: MOV OUT[1], IN[1]\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(int mode) |
{ |
void *handle; |
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const char *origin_upper_left_text = |
"FRAG\n" |
"PROPERTY FS_COORD_ORIGIN UPPER_LEFT\n" /* upper-left = black corner */ |
"DCL IN[0], POSITION, LINEAR\n" |
"DCL OUT[0], COLOR\n" |
"DCL TEMP[0]\n" |
"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n" |
"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n" |
" 0: MOV TEMP[0], IN[0] \n" |
" 1: MOV TEMP[0].zw, IMM[1].xxxx \n" |
" 2: MUL OUT[0], TEMP[0], IMM[0] \n" |
" 3: END\n"; |
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const char *origin_lower_left_text = |
"FRAG\n" |
"PROPERTY FS_COORD_ORIGIN LOWER_LEFT\n" /* lower-left = black corner */ |
"DCL IN[0], POSITION, LINEAR\n" |
"DCL OUT[0], COLOR\n" |
"DCL TEMP[0]\n" |
"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 }\n" |
"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 }\n" |
" 0: MOV TEMP[0], IN[0] \n" |
" 1: MOV TEMP[0].zw, IMM[1].xxxx \n" |
" 2: MUL OUT[0], TEMP[0], IMM[0] \n" |
" 3: END\n"; |
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/* Test fragcoord center integer vs. half integer */ |
const char *center_integer_text = |
"FRAG\n" |
"PROPERTY FS_COORD_PIXEL_CENTER INTEGER \n" /* pixels are black */ |
"DCL IN[0], POSITION, LINEAR \n" |
"DCL OUT[0], COLOR \n" |
"DCL TEMP[0] \n" |
"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n" |
"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n" |
"0: FRC TEMP[0], IN[0] \n" |
"1: MOV TEMP[0].zw, IMM[1].xxxx \n" |
"2: MOV OUT[0], TEMP[0] \n" |
"3: END \n"; |
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const char *center_half_integer_text = |
"FRAG\n" |
"PROPERTY FS_COORD_PIXEL_CENTER HALF_INTEGER \n" /* pixels are olive colored */ |
"DCL IN[0], POSITION, LINEAR \n" |
"DCL OUT[0], COLOR \n" |
"DCL TEMP[0] \n" |
"IMM FLT32 { 0.003333, 0.003333, 1.0, 1.0 } \n" |
"IMM FLT32 { 0.0, 300.0, 0.0, 0.0 } \n" |
"0: FRC TEMP[0], IN[0] \n" |
"1: MOV TEMP[0].zw, IMM[1].xxxx \n" |
"2: MOV OUT[0], TEMP[0] \n" |
"3: END \n"; |
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const char *text; |
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if (mode == 0) |
text = origin_upper_left_text; |
else if (mode == 1) |
text = origin_lower_left_text; |
else if (mode == 2) |
text = center_integer_text; |
else |
text = center_half_integer_text; |
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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; |
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clear_color.f[0] = 0.25; |
clear_color.f[1] = 0.25; |
clear_color.f[2] = 0.25; |
clear_color.f[3] = 1.0; |
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info.ctx->clear(info.ctx, |
PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTHSTENCIL, |
&clear_color, 1.0, 0); |
util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, NUM_VERTS); |
info.ctx->flush(info.ctx, NULL, 0); |
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#if 0 |
/* At the moment, libgraw leaks out/makes available some of the |
* symbols from gallium/auxiliary, including these debug helpers. |
* Will eventually want to bless some of these paths, and lock the |
* others down so they aren't accessible from test programs. |
* |
* This currently just happens to work on debug builds - a release |
* build will probably fail to link here: |
*/ |
debug_dump_surface_bmp(info.ctx, "result.bmp", surf); |
#endif |
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graw_util_flush_front(&info); |
} |
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#if 0 |
static void |
resize(int w, int h) |
{ |
width = w; |
height = h; |
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set_viewport(0, 0, width, height, 30, 1000); |
} |
#endif |
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static void |
init(int mode) |
{ |
if (!graw_util_create_window(&info, width, height, 1, TRUE)) |
exit(1); |
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graw_util_default_state(&info, TRUE); |
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graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0); |
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set_vertices(); |
set_vertex_shader(); |
set_fragment_shader(mode); |
} |
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int |
main(int argc, char *argv[]) |
{ |
int mode = argc > 1 ? atoi(argv[1]) : 0; |
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switch (mode) { |
default: |
case 0: |
printf("frag coord origin upper-left (lower-left = black)\n"); |
break; |
case 1: |
printf("frag coord origin lower-left (upper-left = black)\n"); |
break; |
case 2: |
printf("frag coord center integer (all pixels black)\n"); |
break; |
case 3: |
printf("frag coord center half-integer (all pixels olive color)\n"); |
break; |
} |
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init(mode); |
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graw_set_display_func(draw); |
/*graw_set_reshape_func(resize);*/ |
graw_main_loop(); |
return 0; |
} |