src/gallium/tests/graw/quad-tex.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 "graw_util.h"
   6
   7 static const int WIDTH = 300;
   8 static const int HEIGHT = 300;
   9
  10 static struct graw_info info;
  11
  12
  13 static struct pipe_resource *texture = NULL;
  14 static struct pipe_sampler_view *sv = NULL;
  15 static void *sampler = NULL;
  16
  17 struct vertex {
  18    float position[4];
  19    float color[4];
  20 };
  21
  22 static struct vertex vertices[] =
  23 {
  24    { { 0.9, -0.9, 0.0, 1.0 },
  25      { 1, 0, 0, 1 } },
  26
  27    { { 0.9,  0.9, 0.0, 1.0 },
  28      { 1, 1, 0, 1 } },
  29
  30    { {-0.9,  0.9, 0.0, 1.0 },
  31      { 0, 1, 0, 1 } },
  32
  33    { {-0.9,  -0.9, 0.0, 1.0 },
  34      { 0, 0, 0, 1 } },
  35 };
  36
  37
  38
  39
  40 static void set_vertices( void )
  41 {
  42    struct pipe_vertex_element ve[2];
  43    struct pipe_vertex_buffer vbuf;
  44    void *handle;
  45
  46    memset(ve, 0, sizeof ve);
  47
  48    ve[0].src_offset = Offset(struct vertex, position);
  49    ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  50    ve[1].src_offset = Offset(struct vertex, color);
  51    ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  52
  53    handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
  54    info.ctx->bind_vertex_elements_state(info.ctx, handle);
  55
  56    memset(&vbuf, 0, sizeof vbuf);
  57
  58    vbuf.stride = sizeof( struct vertex );
  59    vbuf.buffer_offset = 0;
  60    vbuf.buffer = pipe_buffer_create_with_data(info.ctx,
  61                                               PIPE_BIND_VERTEX_BUFFER,
  62                                               PIPE_USAGE_STATIC,
  63                                               sizeof(vertices),
  64                                               vertices);
  65
  66    info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf);
  67 }
  68
  69 static void set_vertex_shader( void )
  70 {
  71    void *handle;
  72    const char *text =
  73       "VERT\n"
  74       "DCL IN[0]\n"
  75       "DCL IN[1]\n"
  76       "DCL OUT[0], POSITION\n"
  77       "DCL OUT[1], GENERIC[0]\n"
  78       "  0: MOV OUT[1], IN[1]\n"
  79       "  1: MOV OUT[0], IN[0]\n"
  80       "  2: END\n";
  81
  82    handle = graw_parse_vertex_shader(info.ctx, text);
  83    info.ctx->bind_vs_state(info.ctx, handle);
  84 }
  85
  86 static void set_fragment_shader( void )
  87 {
  88    void *handle;
  89    const char *text =
  90       "FRAG\n"
  91       "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
  92       "DCL OUT[0], COLOR\n"
  93       "DCL TEMP[0]\n"
  94       "DCL SAMP[0]\n"
  95       "  0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
  96       "  1: MOV OUT[0], TEMP[0]\n"
  97       "  2: END\n";
  98
  99    handle = graw_parse_fragment_shader(info.ctx, text);
 100    info.ctx->bind_fs_state(info.ctx, handle);
 101 }
 102
 103
 104 static void draw( void )
 105 {
 106    union pipe_color_union clear_color = { {.5,.5,.5,1} };
 107
 108    info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
 109    util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
 110    info.ctx->flush(info.ctx, NULL, 0);
 111
 112    graw_save_surface_to_file(info.ctx, info.color_surf[0], NULL);
 113
 114    graw_util_flush_front(&info);
 115 }
 116
 117
 118 #define SIZE 16
 119
 120 static void init_tex( void )
 121 {
 122    ubyte tex2d[SIZE][SIZE][4];
 123    int s, t;
 124
 125 #if (SIZE != 2)
 126    for (s = 0; s < SIZE; s++) {
 127       for (t = 0; t < SIZE; t++) {
 128          if (0) {
 129             int x = (s ^ t) & 1;
 130             tex2d[t][s][0] = (x) ? 0 : 63;
 131             tex2d[t][s][1] = (x) ? 0 : 128;
 132             tex2d[t][s][2] = 0;
 133             tex2d[t][s][3] = 0xff;
 134          }
 135          else {
 136             int x = ((s ^ t) >> 2) & 1;
 137             tex2d[t][s][0] = s*255/(SIZE-1);
 138             tex2d[t][s][1] = t*255/(SIZE-1);
 139             tex2d[t][s][2] = (x) ? 0 : 128;
 140             tex2d[t][s][3] = 0xff;
 141          }
 142       }
 143    }
 144 #else
 145    tex2d[0][0][0] = 0;
 146    tex2d[0][0][1] = 255;
 147    tex2d[0][0][2] = 255;
 148    tex2d[0][0][3] = 0;
 149
 150    tex2d[0][1][0] = 0;
 151    tex2d[0][1][1] = 0;
 152    tex2d[0][1][2] = 255;
 153    tex2d[0][1][3] = 255;
 154
 155    tex2d[1][0][0] = 255;
 156    tex2d[1][0][1] = 255;
 157    tex2d[1][0][2] = 0;
 158    tex2d[1][0][3] = 255;
 159
 160    tex2d[1][1][0] = 255;
 161    tex2d[1][1][1] = 0;
 162    tex2d[1][1][2] = 0;
 163    tex2d[1][1][3] = 255;
 164 #endif
 165
 166    texture = graw_util_create_tex2d(&info, SIZE, SIZE,
 167                                     PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
 168
 169    sv = graw_util_create_simple_sampler_view(&info, texture);
 170    info.ctx->set_fragment_sampler_views(info.ctx, 1, &sv);
 171
 172    sampler = graw_util_create_simple_sampler(&info,
 173                                              PIPE_TEX_WRAP_REPEAT,
 174                                              PIPE_TEX_FILTER_NEAREST);
 175    info.ctx->bind_sampler_states(info.ctx, PIPE_SHADER_FRAGMENT,
 176                                  0, 1, &sampler);
 177 }
 178
 179
 180 static void init( void )
 181 {
 182    if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
 183       exit(1);
 184
 185    graw_util_default_state(&info, FALSE);
 186
 187    {
 188       struct pipe_rasterizer_state rasterizer;
 189       void *handle;
 190       memset(&rasterizer, 0, sizeof rasterizer);
 191       rasterizer.cull_face = PIPE_FACE_NONE;
 192       rasterizer.half_pixel_center = 1;
 193       rasterizer.bottom_edge_rule = 1;
 194       rasterizer.depth_clip = 1;
 195       handle = info.ctx->create_rasterizer_state(info.ctx, &rasterizer);
 196       info.ctx->bind_rasterizer_state(info.ctx, handle);
 197    }
 198
 199    graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 1000);
 200
 201    init_tex();
 202
 203    set_vertices();
 204    set_vertex_shader();
 205    set_fragment_shader();
 206 }
 207
 208
 209 static void args(int argc, char *argv[])
 210 {
 211    int i;
 212
 213    for (i = 1; i < argc;) {
 214       if (graw_parse_args(&i, argc, argv)) {
 215          continue;
 216       }
 217       exit(1);
 218    }
 219 }
 220
 221 int main( int argc, char *argv[] )
 222 {
 223    args(argc, argv);
 224    init();
 225
 226    graw_set_display_func( draw );
 227    graw_main_loop();
 228    return 0;
 229 }