progs/gallium/raw/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 #include <unistd.h>             /* for sleep() */
  11
  12 #include "util/u_debug.h"       /* debug_dump_surface_bmp() */
  13
  14 enum pipe_format formats[] = {
  15    PIPE_FORMAT_R8G8B8A8_UNORM,
  16    PIPE_FORMAT_B8G8R8A8_UNORM,
  17    PIPE_FORMAT_NONE
  18 };
  19
  20 static const int WIDTH = 300;
  21 static const int HEIGHT = 300;
  22
  23 int main( int argc, char *argv[] )
  24 {
  25    struct pipe_screen *screen;
  26    struct pipe_context *pipe;
  27    struct pipe_surface *surf;
  28    struct pipe_framebuffer_state fb;
  29    struct pipe_texture *tex, templat;
  30    void *window = NULL;
  31    float clear_color[4] = {1,0,1,1};
  32    int i;
  33
  34    screen = graw_init();
  35    if (screen == NULL)
  36       exit(1);
  37
  38    for (i = 0;
  39         window == NULL && formats[i] != PIPE_FORMAT_NONE;
  40         i++) {
  41
  42       window = graw_create_window(0,0,300,300, formats[i]);
  43    }
  44
  45    if (window == NULL)
  46       exit(2);
  47
  48    pipe = screen->context_create(screen, NULL);
  49    if (pipe == NULL)
  50       exit(3);
  51
  52    templat.target = PIPE_TEXTURE_2D;
  53    templat.format = formats[i];
  54    templat.width0 = WIDTH;
  55    templat.height0 = HEIGHT;
  56    templat.depth0 = 1;
  57    templat.last_level = 0;
  58    templat.nr_samples = 1;
  59    templat.tex_usage = (PIPE_TEXTURE_USAGE_RENDER_TARGET |
  60                         PIPE_TEXTURE_USAGE_DISPLAY_TARGET);
  61
  62    tex = screen->texture_create(screen,
  63                                 &templat);
  64    if (tex == NULL)
  65       exit(4);
  66
  67    surf = screen->get_tex_surface(screen, tex, 0, 0, 0,
  68                                   PIPE_TEXTURE_USAGE_RENDER_TARGET |
  69                                   PIPE_TEXTURE_USAGE_DISPLAY_TARGET);
  70    if (surf == NULL)
  71       exit(5);
  72
  73    memset(&fb, 0, sizeof fb);
  74    fb.nr_cbufs = 1;
  75    fb.width = WIDTH;
  76    fb.height = HEIGHT;
  77    fb.cbufs[0] = surf;
  78
  79    pipe->set_framebuffer_state(pipe, &fb);
  80    pipe->clear(pipe, PIPE_CLEAR_COLOR, clear_color, 0, 0);
  81    pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
  82
  83    /* At the moment, libgraw includes/makes available all the symbols
  84     * from gallium/auxiliary, including these debug helpers.  Will
  85     * eventually want to bless some of these paths, and lock the
  86     * others down so they aren't accessible from test programs.
  87     */
  88    if (0)
  89       debug_dump_surface_bmp(pipe, "result.bmp", surf);
  90
  91    screen->flush_frontbuffer(screen, surf, window);
  92
  93    sleep(100);
  94    return 0;
  95 }