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 #include "os/os_time.h"       /* os_time_sleep() */
  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 struct pipe_screen *screen;
  24 struct pipe_context *ctx;
  25 struct pipe_surface *surf;
  26 static void *window = NULL;
  27
  28 static void draw( void )
  29 {
  30    float clear_color[4] = {1,0,1,1};
  31
  32    ctx->clear(ctx, PIPE_CLEAR_COLOR, clear_color, 0, 0);
  33    ctx->flush(ctx, PIPE_FLUSH_RENDER_CACHE, NULL);
  34
  35 #if 0
  36    /* At the moment, libgraw leaks out/makes available some of the
  37     * symbols from gallium/auxiliary, including these debug helpers.
  38     * Will eventually want to bless some of these paths, and lock the
  39     * others down so they aren't accessible from test programs.
  40     *
  41     * This currently just happens to work on debug builds - a release
  42     * build will probably fail to link here:
  43     */
  44    debug_dump_surface_bmp(ctx, "result.bmp", surf);
  45 #endif
  46
  47    screen->flush_frontbuffer(screen, surf, window);
  48 }
  49
  50 static void init( void )
  51 {
  52    struct pipe_framebuffer_state fb;
  53    struct pipe_resource *tex, templat;
  54    int i;
  55
  56    /* It's hard to say whether window or screen should be created
  57     * first.  Different environments would prefer one or the other.
  58     *
  59     * Also, no easy way of querying supported formats if the screen
  60     * cannot be created first.
  61     */
  62    for (i = 0;
  63         window == NULL && formats[i] != PIPE_FORMAT_NONE;
  64         i++) {
  65
  66       screen = graw_create_window_and_screen(0,0,300,300,
  67                                              formats[i],
  68                                              &window);
  69    }
  70    if (window == NULL)
  71       exit(2);
  72
  73    ctx = screen->context_create(screen, NULL);
  74    if (ctx == NULL)
  75       exit(3);
  76
  77    templat.target = PIPE_TEXTURE_2D;
  78    templat.format = formats[i];
  79    templat.width0 = WIDTH;
  80    templat.height0 = HEIGHT;
  81    templat.depth0 = 1;
  82    templat.last_level = 0;
  83    templat.nr_samples = 1;
  84    templat.bind = (PIPE_BIND_RENDER_TARGET |
  85                    PIPE_BIND_DISPLAY_TARGET);
  86
  87    tex = screen->resource_create(screen,
  88                                  &templat);
  89    if (tex == NULL)
  90       exit(4);
  91
  92    surf = screen->get_tex_surface(screen, tex, 0, 0, 0,
  93                                   PIPE_BIND_RENDER_TARGET |
  94                                   PIPE_BIND_DISPLAY_TARGET);
  95    if (surf == NULL)
  96       exit(5);
  97
  98    memset(&fb, 0, sizeof fb);
  99    fb.nr_cbufs = 1;
 100    fb.width = WIDTH;
 101    fb.height = HEIGHT;
 102    fb.cbufs[0] = surf;
 103
 104    ctx->set_framebuffer_state(ctx, &fb);
 105 }
 106
 107
 108
 109 int main( int argc, char *argv[] )
 110 {
 111    init();
 112
 113    graw_set_display_func( draw );
 114    graw_main_loop();
 115    return 0;
 116 }