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/* Test the TGSI_SEMANTIC_POSITION fragment shader input.
* Plus properties for upper-left vs. lower-left origin and
* center integer vs. half-integer;
*/
#include <stdio.h>
#include "graw_util.h"
static int width = 300;
static int height = 300;
static struct graw_info info;
struct vertex {
float position[4];
float color[4];
};
/* 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 }
},
{
{ 0.85, -0.95, 0.5, 1.0 },
{ 0, 0, 0, 1 }
},
{
{ 0.95, 0.95, 0.5, 1.0 },
{ 0, 0, 0, 1 }
},
{
{-0.95, 0.95, 0.5, 1.0 },
{ 0, 0, 0, 1 }
}
};
#define NUM_VERTS (sizeof(vertices) / sizeof(vertices[0]))
static void
set_vertices(void)
{
struct pipe_vertex_element ve[2];
struct pipe_vertex_buffer vbuf;
void *handle;
memset(ve, 0, sizeof ve);
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;
handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
info.ctx->bind_vertex_elements_state(info.ctx, handle);
vbuf.stride = sizeof(struct vertex);
vbuf.buffer_offset = 0;
vbuf.buffer = info.screen->user_buffer_create(info.screen,
vertices,
sizeof(vertices),
PIPE_BIND_VERTEX_BUFFER);
info.ctx->set_vertex_buffers(info.ctx, 1, &vbuf);
}
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";
handle = graw_parse_vertex_shader(info.ctx, text);
info.ctx->bind_vs_state(info.ctx, handle);
}
static void
set_fragment_shader(int mode)
{
void *handle;
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";
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";
/* 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";
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";
const char *text;
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;
handle = graw_parse_fragment_shader(info.ctx, text);
info.ctx->bind_fs_state(info.ctx, handle);
}
static void
draw(void)
{
union pipe_color_union clear_color;
clear_color.f[0] = 0.25;
clear_color.f[1] = 0.25;
clear_color.f[2] = 0.25;
clear_color.f[3] = 1.0;
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);
#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
graw_util_flush_front(&info);
}
#if 0
static void
resize(int w, int h)
{
width = w;
height = h;
set_viewport(0, 0, width, height, 30, 1000);
}
#endif
static void
init(int mode)
{
if (!graw_util_create_window(&info, width, height, 1, TRUE))
exit(1);
graw_util_default_state(&info, TRUE);
graw_util_viewport(&info, 0, 0, width, height, -1.0, 1.0);
set_vertices();
set_vertex_shader();
set_fragment_shader(mode);
}
int
main(int argc, char *argv[])
{
int mode = argc > 1 ? atoi(argv[1]) : 0;
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;
}
init(mode);
graw_set_display_func(draw);
/*graw_set_reshape_func(resize);*/
graw_main_loop();
return 0;
}
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