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
  57    vbuf.stride = sizeof( struct vertex );
  58    vbuf.buffer_offset = 0;
  59    vbuf.buffer = info.screen->user_buffer_create(info.screen,
  60                                             vertices,
  61                                             sizeof(vertices),
  62                                             PIPE_BIND_VERTEX_BUFFER);
  63
  64    info.ctx->set_vertex_buffers(info.ctx, 1, &vbuf);
  65 }
  66
  67 static void set_vertex_shader( void )
  68 {
  69    void *handle;
  70    const char *text =
  71       "VERT\n"
  72       "DCL IN[0]\n"
  73       "DCL IN[1]\n"
  74       "DCL OUT[0], POSITION\n"
  75       "DCL OUT[1], GENERIC[0]\n"
  76       "  0: MOV OUT[1], IN[1]\n"
  77       "  1: MOV OUT[0], IN[0]\n"
  78       "  2: END\n";
  79
  80    handle = graw_parse_vertex_shader(info.ctx, text);
  81    info.ctx->bind_vs_state(info.ctx, handle);
  82 }
  83
  84 static void set_fragment_shader( void )
  85 {
  86    void *handle;
  87    const char *text =
  88       "FRAG\n"
  89       "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
  90       "DCL OUT[0], COLOR\n"
  91       "DCL TEMP[0]\n"
  92       "DCL SAMP[0]\n"
  93       "  0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
  94       "  1: MOV OUT[0], TEMP[0]\n"
  95       "  2: END\n";
  96
  97    handle = graw_parse_fragment_shader(info.ctx, text);
  98    info.ctx->bind_fs_state(info.ctx, handle);
  99 }
 100
 101
 102 static void draw( void )
 103 {
 104    union pipe_color_union clear_color = { {.5,.5,.5,1} };
 105
 106    info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
 107    util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
 108    info.ctx->flush(info.ctx, NULL);
 109
 110    graw_save_surface_to_file(info.ctx, info.color_surf[0], NULL);
 111
 112    graw_util_flush_front(&info);
 113 }
 114
 115
 116 #define SIZE 16
 117
 118 static void init_tex( void )
 119 {
 120    ubyte tex2d[SIZE][SIZE][4];
 121    int s, t;
 122
 123 #if (SIZE != 2)
 124    for (s = 0; s < SIZE; s++) {
 125       for (t = 0; t < SIZE; t++) {
 126          if (0) {
 127             int x = (s ^ t) & 1;
 128             tex2d[t][s][0] = (x) ? 0 : 63;
 129             tex2d[t][s][1] = (x) ? 0 : 128;
 130             tex2d[t][s][2] = 0;
 131             tex2d[t][s][3] = 0xff;
 132          }
 133          else {
 134             int x = ((s ^ t) >> 2) & 1;
 135             tex2d[t][s][0] = s*255/(SIZE-1);
 136             tex2d[t][s][1] = t*255/(SIZE-1);
 137             tex2d[t][s][2] = (x) ? 0 : 128;
 138             tex2d[t][s][3] = 0xff;
 139          }
 140       }
 141    }
 142 #else
 143    tex2d[0][0][0] = 0;
 144    tex2d[0][0][1] = 255;
 145    tex2d[0][0][2] = 255;
 146    tex2d[0][0][3] = 0;
 147
 148    tex2d[0][1][0] = 0;
 149    tex2d[0][1][1] = 0;
 150    tex2d[0][1][2] = 255;
 151    tex2d[0][1][3] = 255;
 152
 153    tex2d[1][0][0] = 255;
 154    tex2d[1][0][1] = 255;
 155    tex2d[1][0][2] = 0;
 156    tex2d[1][0][3] = 255;
 157
 158    tex2d[1][1][0] = 255;
 159    tex2d[1][1][1] = 0;
 160    tex2d[1][1][2] = 0;
 161    tex2d[1][1][3] = 255;
 162 #endif
 163
 164    texture = graw_util_create_tex2d(&info, SIZE, SIZE,
 165                                     PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
 166
 167    sv = graw_util_create_simple_sampler_view(&info, texture);
 168    info.ctx->set_fragment_sampler_views(info.ctx, 1, &sv);
 169
 170    sampler = graw_util_create_simple_sampler(&info,
 171                                              PIPE_TEX_WRAP_REPEAT,
 172                                              PIPE_TEX_FILTER_NEAREST);
 173    info.ctx->bind_fragment_sampler_states(info.ctx, 1, &sampler);
 174 }
 175
 176
 177 static void init( void )
 178 {
 179    if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
 180       exit(1);
 181
 182    graw_util_default_state(&info, FALSE);
 183
 184    {
 185       struct pipe_rasterizer_state rasterizer;
 186       void *handle;
 187       memset(&rasterizer, 0, sizeof rasterizer);
 188       rasterizer.cull_face = PIPE_FACE_NONE;
 189       rasterizer.gl_rasterization_rules = 1;
 190       rasterizer.depth_clip = 1;
 191       handle = info.ctx->create_rasterizer_state(info.ctx, &rasterizer);
 192       info.ctx->bind_rasterizer_state(info.ctx, handle);
 193    }
 194
 195    graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 1000);
 196
 197    init_tex();
 198
 199    set_vertices();
 200    set_vertex_shader();
 201    set_fragment_shader();
 202 }
 203
 204
 205 static void args(int argc, char *argv[])
 206 {
 207    int i;
 208
 209    for (i = 1; i < argc;) {
 210       if (graw_parse_args(&i, argc, argv)) {
 211          continue;
 212       }
 213       exit(1);
 214    }
 215 }
 216
 217 int main( int argc, char *argv[] )
 218 {
 219    args(argc, argv);
 220    init();
 221
 222    graw_set_display_func( draw );
 223    graw_main_loop();
 224    return 0;
 225 }