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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 "state_tracker/graw.h"
#include "pipe/p_screen.h"
#include "pipe/p_context.h"
#include "pipe/p_state.h"
#include "pipe/p_defines.h"
enum pipe_format formats[] = {
PIPE_FORMAT_R8G8B8A8_UNORM,
PIPE_FORMAT_B8G8R8A8_UNORM,
PIPE_FORMAT_NONE
};
static const int WIDTH = 300;
static const int HEIGHT = 300;
struct pipe_screen *screen;
struct pipe_context *ctx;
struct pipe_surface *surf;
struct pipe_resource *tex;
static void *window = NULL;
static void draw( void )
{
float clear_color[4] = {1,0,1,1};
ctx->clear(ctx, PIPE_CLEAR_COLOR, clear_color, 0, 0);
ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
graw_save_surface_to_file(ctx, surf, NULL);
screen->flush_frontbuffer(screen, tex, 0, 0, window);
}
static void init( void )
{
struct pipe_framebuffer_state fb;
struct pipe_resource templat;
struct pipe_surface surf_tmpl;
int i;
/* It's hard to say whether window or screen should be created
* first. Different environments would prefer one or the other.
*
* Also, no easy way of querying supported formats if the screen
* cannot be created first.
*/
for (i = 0;
window == NULL && formats[i] != PIPE_FORMAT_NONE;
i++) {
screen = graw_create_window_and_screen(0,0,300,300,
formats[i],
&window);
}
if (window == NULL)
exit(2);
ctx = screen->context_create(screen, NULL);
if (ctx == NULL)
exit(3);
templat.target = PIPE_TEXTURE_2D;
templat.format = formats[i];
templat.width0 = WIDTH;
templat.height0 = HEIGHT;
templat.depth0 = 1;
templat.array_size = 1;
templat.last_level = 0;
templat.nr_samples = 1;
templat.bind = (PIPE_BIND_RENDER_TARGET |
PIPE_BIND_DISPLAY_TARGET);
tex = screen->resource_create(screen,
&templat);
if (tex == NULL)
exit(4);
surf_tmpl.format = templat.format;
surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
surf_tmpl.u.tex.level = 0;
surf_tmpl.u.tex.first_layer = 0;
surf_tmpl.u.tex.last_layer = 0;
surf = ctx->create_surface(ctx, tex, &surf_tmpl);
if (surf == NULL)
exit(5);
memset(&fb, 0, sizeof fb);
fb.nr_cbufs = 1;
fb.width = WIDTH;
fb.height = HEIGHT;
fb.cbufs[0] = surf;
ctx->set_framebuffer_state(ctx, &fb);
}
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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