/* Display a cleared blue window. This demo has no dependencies on
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* any utility code, just the graw interface and gallium.
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*/
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#include <stdio.h>
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#include "state_tracker/graw.h"
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#include "pipe/p_screen.h"
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#include "pipe/p_context.h"
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#include "pipe/p_state.h"
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#include "pipe/p_defines.h"
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enum pipe_format formats[] = {
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PIPE_FORMAT_RGBA8888_UNORM,
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PIPE_FORMAT_BGRA8888_UNORM,
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PIPE_FORMAT_NONE
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};
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static const int WIDTH = 300;
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static const int HEIGHT = 300;
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struct pipe_screen *screen;
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struct pipe_context *ctx;
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struct pipe_surface *surf;
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struct pipe_resource *tex;
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static void *window = NULL;
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static void draw( void )
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{
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union pipe_color_union clear_color = { {1, 0, 1, 1} };
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ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
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ctx->flush(ctx, NULL, 0);
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graw_save_surface_to_file(ctx, surf, NULL);
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screen->flush_frontbuffer(screen, tex, 0, 0, window, NULL);
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}
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static void init( void )
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{
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struct pipe_framebuffer_state fb;
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struct pipe_resource templat;
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struct pipe_surface surf_tmpl;
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int i;
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/* It's hard to say whether window or screen should be created
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* first. Different environments would prefer one or the other.
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*
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* Also, no easy way of querying supported formats if the screen
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* cannot be created first.
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*/
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for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {
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screen = graw_create_window_and_screen(0, 0, 300, 300,
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formats[i],
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&window);
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if (window && screen)
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break;
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}
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if (!screen || !window) {
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fprintf(stderr, "Unable to create window\n");
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exit(1);
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}
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ctx = screen->context_create(screen, NULL, 0);
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if (ctx == NULL)
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exit(3);
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memset(&templat, 0, sizeof(templat));
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templat.target = PIPE_TEXTURE_2D;
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templat.format = formats[i];
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templat.width0 = WIDTH;
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templat.height0 = HEIGHT;
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templat.depth0 = 1;
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templat.array_size = 1;
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templat.last_level = 0;
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templat.nr_samples = 1;
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templat.bind = (PIPE_BIND_RENDER_TARGET |
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PIPE_BIND_DISPLAY_TARGET);
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tex = screen->resource_create(screen,
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&templat);
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if (tex == NULL)
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exit(4);
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surf_tmpl.format = templat.format;
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surf_tmpl.u.tex.level = 0;
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surf_tmpl.u.tex.first_layer = 0;
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surf_tmpl.u.tex.last_layer = 0;
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surf = ctx->create_surface(ctx, tex, &surf_tmpl);
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if (surf == NULL)
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exit(5);
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memset(&fb, 0, sizeof fb);
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fb.nr_cbufs = 1;
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fb.width = WIDTH;
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fb.height = HEIGHT;
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fb.cbufs[0] = surf;
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ctx->set_framebuffer_state(ctx, &fb);
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}
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static void args(int argc, char *argv[])
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{
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int i;
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for (i = 1; i < argc;) {
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if (graw_parse_args(&i, argc, argv)) {
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continue;
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}
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exit(1);
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}
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}
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int main( int argc, char *argv[] )
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{
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args(argc, argv);
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init();
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graw_set_display_func( draw );
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graw_main_loop();
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return 0;
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}
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