src/gallium/tests/graw/clear.c

   1 /* Display a cleared blue window.  This demo has no dependencies on
   2  * any utility code, just the graw interface and gallium.
   3  */
   4
   5 #include "state_tracker/graw.h"
   6 #include "pipe/p_screen.h"
   7 #include "pipe/p_context.h"
   8 #include "pipe/p_state.h"
   9 #include "pipe/p_defines.h"
  10
  11 #include "util/u_debug.h"       /* debug_dump_surface_bmp() */
  12
  13 enum pipe_format formats[] = {
  14    PIPE_FORMAT_R8G8B8A8_UNORM,
  15    PIPE_FORMAT_B8G8R8A8_UNORM,
  16    PIPE_FORMAT_NONE
  17 };
  18
  19 static const int WIDTH = 300;
  20 static const int HEIGHT = 300;
  21
  22 struct pipe_screen *screen;
  23 struct pipe_context *ctx;
  24 struct pipe_surface *surf;
  25 static void *window = NULL;
  26
  27 static void draw( void )
  28 {
  29    float clear_color[4] = {1,0,1,1};
  30
  31    ctx->clear(ctx, PIPE_CLEAR_COLOR, clear_color, 0, 0);
  32    ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
  33
  34 #if 0
  35    /* At the moment, libgraw leaks out/makes available some of the
  36     * symbols from gallium/auxiliary, including these debug helpers.
  37     * Will eventually want to bless some of these paths, and lock the
  38     * others down so they aren't accessible from test programs.
  39     *
  40     * This currently just happens to work on debug builds - a release
  41     * build will probably fail to link here:
  42     */
  43    debug_dump_surface_bmp(ctx, "result.bmp", surf);
  44 #endif
  45
  46    screen->flush_frontbuffer(screen, surf, window);
  47 }
  48
  49 static void init( void )
  50 {
  51    struct pipe_framebuffer_state fb;
  52    struct pipe_resource *tex, templat;
  53    int i;
  54
  55    /* It's hard to say whether window or screen should be created
  56     * first.  Different environments would prefer one or the other.
  57     *
  58     * Also, no easy way of querying supported formats if the screen
  59     * cannot be created first.
  60     */
  61    for (i = 0;
  62         window == NULL && formats[i] != PIPE_FORMAT_NONE;
  63         i++) {
  64
  65       screen = graw_create_window_and_screen(0,0,300,300,
  66                                              formats[i],
  67                                              &window);
  68    }
  69    if (window == NULL)
  70       exit(2);
  71
  72    ctx = screen->context_create(screen, NULL);
  73    if (ctx == NULL)
  74       exit(3);
  75
  76    templat.target = PIPE_TEXTURE_2D;
  77    templat.format = formats[i];
  78    templat.width0 = WIDTH;
  79    templat.height0 = HEIGHT;
  80    templat.depth0 = 1;
  81    templat.last_level = 0;
  82    templat.nr_samples = 1;
  83    templat.bind = (PIPE_BIND_RENDER_TARGET |
  84                    PIPE_BIND_DISPLAY_TARGET);
  85
  86    tex = screen->resource_create(screen,
  87                                  &templat);
  88    if (tex == NULL)
  89       exit(4);
  90
  91    surf = screen->get_tex_surface(screen, tex, 0, 0, 0,
  92                                   PIPE_BIND_RENDER_TARGET |
  93                                   PIPE_BIND_DISPLAY_TARGET);
  94    if (surf == NULL)
  95       exit(5);
  96
  97    memset(&fb, 0, sizeof fb);
  98    fb.nr_cbufs = 1;
  99    fb.width = WIDTH;
 100    fb.height = HEIGHT;
 101    fb.cbufs[0] = surf;
 102
 103    ctx->set_framebuffer_state(ctx, &fb);
 104 }
 105
 106
 107
 108 int main( int argc, char *argv[] )
 109 {
 110    init();
 111
 112    graw_set_display_func( draw );
 113    graw_main_loop();
 114    return 0;
 115 }