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/* Test texture swizzles */
#include <stdio.h>
#include "graw_util.h"
static struct graw_info info;
static struct pipe_resource *texture = NULL;
static struct pipe_sampler_view *sv = NULL;
static void *sampler = NULL;
static const int WIDTH = 300;
static const int HEIGHT = 300;
struct vertex {
float position[4];
float color[4];
};
static struct vertex vertices[] =
{
{ { 0.9, -0.9, 0.0, 1.0 },
{ 1, 0, 0, 1 } },
{ { 0.9, 0.9, 0.0, 1.0 },
{ 1, 1, 0, 1 } },
{ {-0.9, 0.9, 0.0, 1.0 },
{ 0, 1, 0, 1 } },
{ {-0.9, -0.9, 0.0, 1.0 },
{ 0, 0, 0, 1 } },
};
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[1], IN[1]\n"
" 1: MOV OUT[0], IN[0]\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(void)
{
void *handle;
const char *text =
"FRAG\n"
"DCL IN[0], GENERIC[0], PERSPECTIVE\n"
"DCL OUT[0], COLOR\n"
"DCL SAMP[0]\n"
" 0: TXP OUT[0], IN[0], SAMP[0], 2D\n"
" 2: END\n";
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] = 0.5;
clear_color.f[1] = 0.5;
clear_color.f[2] = 0.5;
clear_color.f[3] = 1.0;
info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
info.ctx->flush(info.ctx, NULL);
graw_util_flush_front(&info);
}
static void
init_tex(const unsigned swizzle[4])
{
#define SIZE 256
struct pipe_sampler_view sv_template;
ubyte tex2d[SIZE][SIZE][4];
int s, t;
for (s = 0; s < SIZE; s++) {
for (t = 0; t < SIZE; t++) {
tex2d[t][s][0] = 0; /*B*/
tex2d[t][s][1] = t; /*G*/
tex2d[t][s][2] = s; /*R*/
tex2d[t][s][3] = 1; /*A*/
}
}
texture = graw_util_create_tex2d(&info, SIZE, SIZE,
PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
memset(&sv_template, 0, sizeof sv_template);
sv_template.format = texture->format;
sv_template.texture = texture;
sv_template.swizzle_r = swizzle[0];
sv_template.swizzle_g = swizzle[1];
sv_template.swizzle_b = swizzle[2];
sv_template.swizzle_a = swizzle[3];
sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_template);
if (sv == NULL)
exit(5);
info.ctx->set_fragment_sampler_views(info.ctx, 1, &sv);
sampler = graw_util_create_simple_sampler(&info,
PIPE_TEX_WRAP_REPEAT,
PIPE_TEX_FILTER_NEAREST);
info.ctx->bind_fragment_sampler_states(info.ctx, 1, &sampler);
#undef SIZE
}
static void
init(const unsigned swizzle[4])
{
if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
exit(1);
graw_util_default_state(&info, FALSE);
graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 10000);
init_tex(swizzle);
set_vertices();
set_vertex_shader();
set_fragment_shader();
}
static unsigned
char_to_swizzle(char c)
{
switch (c) {
case 'r':
return PIPE_SWIZZLE_RED;
case 'g':
return PIPE_SWIZZLE_GREEN;
case 'b':
return PIPE_SWIZZLE_BLUE;
case 'a':
return PIPE_SWIZZLE_ALPHA;
case '0':
return PIPE_SWIZZLE_ZERO;
case '1':
return PIPE_SWIZZLE_ONE;
default:
return PIPE_SWIZZLE_RED;
}
}
int main(int argc, char *argv[])
{
const char swizzle_names[] = "rgba01";
uint swizzle[4];
int i;
swizzle[0] = PIPE_SWIZZLE_RED;
swizzle[1] = PIPE_SWIZZLE_GREEN;
swizzle[2] = PIPE_SWIZZLE_BLUE;
swizzle[3] = PIPE_SWIZZLE_ALPHA;
for (i = 1; i < argc; i++) {
swizzle[i-1] = char_to_swizzle(argv[i][0]);
}
printf("Example:\n");
printf(" tex-swizzle r 0 g 1\n");
printf("Current swizzle = ");
for (i = 0; i < 4; i++) {
printf("%c", swizzle_names[swizzle[i]]);
}
printf("\n");
init(swizzle);
graw_set_display_func(draw);
graw_main_loop();
return 0;
}
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