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/* Display a cleared blue window. This demo has no dependencies on
* any utility code, just the graw interface and gallium.
*/
#include "graw_util.h"
static const int WIDTH = 300;
static const int HEIGHT = 300;
static struct graw_info info;
static struct pipe_resource *texture = NULL;
static struct pipe_sampler_view *sv = NULL;
static void *sampler = NULL;
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);
memset(&vbuf, 0, sizeof vbuf);
vbuf.stride = sizeof( struct vertex );
vbuf.buffer_offset = 0;
vbuf.buffer = pipe_buffer_create_with_data(info.ctx,
PIPE_BIND_VERTEX_BUFFER,
PIPE_USAGE_DEFAULT,
sizeof(vertices),
vertices);
info.ctx->set_vertex_buffers(info.ctx, 0, 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 TEMP[0]\n"
"DCL SAMP[0]\n"
"DCL SVIEW[0], 2D, FLOAT\n"
" 0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
" 1: MOV OUT[0], TEMP[0]\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 = { {.5,.5,.5,1} };
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, 0);
graw_save_surface_to_file(info.ctx, info.color_surf[0], NULL);
graw_util_flush_front(&info);
}
#define SIZE 16
static void init_tex( void )
{
ubyte tex2d[SIZE][SIZE][4];
int s, t;
#if (SIZE != 2)
for (s = 0; s < SIZE; s++) {
for (t = 0; t < SIZE; t++) {
if (0) {
int x = (s ^ t) & 1;
tex2d[t][s][0] = (x) ? 0 : 63;
tex2d[t][s][1] = (x) ? 0 : 128;
tex2d[t][s][2] = 0;
tex2d[t][s][3] = 0xff;
}
else {
int x = ((s ^ t) >> 2) & 1;
tex2d[t][s][0] = s*255/(SIZE-1);
tex2d[t][s][1] = t*255/(SIZE-1);
tex2d[t][s][2] = (x) ? 0 : 128;
tex2d[t][s][3] = 0xff;
}
}
}
#else
tex2d[0][0][0] = 0;
tex2d[0][0][1] = 255;
tex2d[0][0][2] = 255;
tex2d[0][0][3] = 0;
tex2d[0][1][0] = 0;
tex2d[0][1][1] = 0;
tex2d[0][1][2] = 255;
tex2d[0][1][3] = 255;
tex2d[1][0][0] = 255;
tex2d[1][0][1] = 255;
tex2d[1][0][2] = 0;
tex2d[1][0][3] = 255;
tex2d[1][1][0] = 255;
tex2d[1][1][1] = 0;
tex2d[1][1][2] = 0;
tex2d[1][1][3] = 255;
#endif
texture = graw_util_create_tex2d(&info, SIZE, SIZE,
PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
sv = graw_util_create_simple_sampler_view(&info, texture);
info.ctx->set_sampler_views(info.ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv);
sampler = graw_util_create_simple_sampler(&info,
PIPE_TEX_WRAP_REPEAT,
PIPE_TEX_FILTER_NEAREST);
info.ctx->bind_sampler_states(info.ctx, PIPE_SHADER_FRAGMENT,
0, 1, &sampler);
}
static void init( void )
{
if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
exit(1);
graw_util_default_state(&info, FALSE);
{
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.depth_clip = 1;
handle = info.ctx->create_rasterizer_state(info.ctx, &rasterizer);
info.ctx->bind_rasterizer_state(info.ctx, handle);
}
graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 1000);
init_tex();
set_vertices();
set_vertex_shader();
set_fragment_shader();
}
static void args(int argc, char *argv[])
{
int i;
for (i = 1; i < argc;) {
if (graw_parse_args(&i, argc, argv)) {
continue;
}
exit(1);
}
}
int main( int argc, char *argv[] )
{
args(argc, argv);
init();
graw_set_display_func( draw );
graw_main_loop();
return 0;
}
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