| /* Display a cleared blue window. This demo has no dependencies on |
| * any utility code, just the graw interface and gallium. |
| */ |
| |
| #include <stdio.h> |
| #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 ) |
| { |
| union pipe_color_union clear_color = { .f = {1, 0, 1, 1} }; |
| |
| ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0); |
| ctx->flush(ctx, 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; formats[i] != PIPE_FORMAT_NONE; i++) { |
| screen = graw_create_window_and_screen(0, 0, 300, 300, |
| formats[i], |
| &window); |
| if (window && screen) |
| break; |
| } |
| if (!screen || !window) { |
| fprintf(stderr, "Unable to create window\n"); |
| exit(1); |
| } |
| |
| 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; |
| } |