src/gallium/tests/graw/tex-srgb.c

   1 /* Test sRGB texturing.
   2  */
   3
   4 #include "graw_util.h"
   5
   6
   7 static const int WIDTH = 600;
   8 static const int HEIGHT = 300;
   9
  10 static struct graw_info info;
  11
  12 static struct pipe_resource *texture;
  13 static struct pipe_sampler_view *linear_sv, *srgb_sv;
  14
  15
  16 struct vertex {
  17    float position[4];
  18    float color[4];
  19 };
  20
  21 static struct vertex vertices1[] =
  22 {
  23    { { -0.1, -0.9, 0.0, 1.0 },
  24      { 1, 1, 0, 1 } },
  25
  26    { { -0.1,  0.9, 0.0, 1.0 },
  27      { 1, 0, 0, 1 } },
  28
  29    { {-0.9,  0.9, 0.0, 1.0 },
  30      { 0, 0, 0, 1 } },
  31
  32    { {-0.9,  -0.9, 0.0, 1.0 },
  33      { 0, 1, 0, 1 } },
  34 };
  35
  36
  37 static struct vertex vertices2[] =
  38 {
  39    { { 0.9, -0.9, 0.0, 1.0 },
  40      { 1, 1, 0, 1 } },
  41
  42    { { 0.9,  0.9, 0.0, 1.0 },
  43      { 1, 0, 0, 1 } },
  44
  45    { { 0.1,  0.9, 0.0, 1.0 },
  46      { 0, 0, 0, 1 } },
  47
  48    { { 0.1,  -0.9, 0.0, 1.0 },
  49      { 0, 1, 0, 1 } },
  50 };
  51
  52
  53
  54
  55 static void
  56 set_vertices(struct vertex *verts, unsigned num_verts)
  57 {
  58    struct pipe_vertex_element ve[2];
  59    struct pipe_vertex_buffer vbuf;
  60    void *handle;
  61
  62    memset(ve, 0, sizeof ve);
  63
  64    ve[0].src_offset = Offset(struct vertex, position);
  65    ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  66    ve[1].src_offset = Offset(struct vertex, color);
  67    ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  68
  69    handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
  70    info.ctx->bind_vertex_elements_state(info.ctx, handle);
  71
  72
  73    vbuf.stride = sizeof(struct vertex);
  74    vbuf.buffer_offset = 0;
  75    vbuf.buffer = pipe_buffer_create_with_data(info.ctx,
  76                                               PIPE_BIND_VERTEX_BUFFER,
  77                                               PIPE_USAGE_STATIC,
  78                                               num_verts * sizeof(struct vertex),
  79                                               verts);
  80
  81    info.ctx->set_vertex_buffers(info.ctx, 1, &vbuf);
  82 }
  83
  84 static void set_vertex_shader( void )
  85 {
  86    void *handle;
  87    const char *text =
  88       "VERT\n"
  89       "DCL IN[0]\n"
  90       "DCL IN[1]\n"
  91       "DCL OUT[0], POSITION\n"
  92       "DCL OUT[1], GENERIC[0]\n"
  93       "  0: MOV OUT[1], IN[1]\n"
  94       "  1: MOV OUT[0], IN[0]\n"
  95       "  2: END\n";
  96
  97    handle = graw_parse_vertex_shader(info.ctx, text);
  98    info.ctx->bind_vs_state(info.ctx, handle);
  99 }
 100
 101 static void set_fragment_shader( void )
 102 {
 103    void *handle;
 104    const char *text =
 105       "FRAG\n"
 106       "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
 107       "DCL OUT[0], COLOR\n"
 108       "DCL TEMP[0]\n"
 109       "DCL SAMP[0]\n"
 110       "  0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
 111       "  1: MOV OUT[0], TEMP[0]\n"
 112       "  2: END\n";
 113
 114    handle = graw_parse_fragment_shader(info.ctx, text);
 115    info.ctx->bind_fs_state(info.ctx, handle);
 116 }
 117
 118
 119 static void draw( void )
 120 {
 121    union pipe_color_union clear_color;
 122
 123    clear_color.f[0] = 0.5;
 124    clear_color.f[1] = 0.5;
 125    clear_color.f[2] = 0.5;
 126    clear_color.f[3] = 1.0;
 127
 128    info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
 129
 130    info.ctx->set_fragment_sampler_views(info.ctx, 1, &linear_sv);
 131    set_vertices(vertices1, 4);
 132    util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
 133
 134    info.ctx->set_fragment_sampler_views(info.ctx, 1, &srgb_sv);
 135    set_vertices(vertices2, 4);
 136    util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
 137
 138    info.ctx->flush(info.ctx, NULL);
 139
 140    graw_util_flush_front(&info);
 141 }
 142
 143
 144 static void init_tex( void )
 145 {
 146 #define SIZE 64
 147    ubyte tex2d[SIZE][SIZE][4];
 148    int s, t;
 149
 150    for (s = 0; s < SIZE; s++) {
 151       for (t = 0; t < SIZE; t++) {
 152          tex2d[t][s][0] = 0;
 153          tex2d[t][s][1] = s * 255 / SIZE;
 154          tex2d[t][s][2] = t * 255 / SIZE;
 155          tex2d[t][s][3] = 255;
 156       }
 157    }
 158
 159    texture = graw_util_create_tex2d(&info, SIZE, SIZE,
 160                                     PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
 161
 162    {
 163       void *sampler;
 164       sampler = graw_util_create_simple_sampler(&info,
 165                                                 PIPE_TEX_WRAP_REPEAT,
 166                                                 PIPE_TEX_FILTER_NEAREST);
 167       info.ctx->bind_fragment_sampler_states(info.ctx, 1, &sampler);
 168    }
 169
 170    /* linear sampler view */
 171    {
 172       struct pipe_sampler_view sv_temp;
 173       memset(&sv_temp, 0, sizeof sv_temp);
 174       sv_temp.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 175       sv_temp.texture = texture;
 176       sv_temp.swizzle_r = PIPE_SWIZZLE_RED;
 177       sv_temp.swizzle_g = PIPE_SWIZZLE_GREEN;
 178       sv_temp.swizzle_b = PIPE_SWIZZLE_BLUE;
 179       sv_temp.swizzle_a = PIPE_SWIZZLE_ALPHA;
 180       linear_sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_temp);
 181       if (linear_sv == NULL)
 182          exit(0);
 183    }
 184
 185    /* srgb sampler view */
 186    {
 187       struct pipe_sampler_view sv_temp;
 188       memset(&sv_temp, 0, sizeof sv_temp);
 189       sv_temp.format = PIPE_FORMAT_B8G8R8A8_SRGB;
 190       sv_temp.texture = texture;
 191       sv_temp.swizzle_r = PIPE_SWIZZLE_RED;
 192       sv_temp.swizzle_g = PIPE_SWIZZLE_GREEN;
 193       sv_temp.swizzle_b = PIPE_SWIZZLE_BLUE;
 194       sv_temp.swizzle_a = PIPE_SWIZZLE_ALPHA;
 195       srgb_sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_temp);
 196       if (srgb_sv == NULL)
 197          exit(0);
 198    }
 199 #undef SIZE
 200 }
 201
 202 static void init( void )
 203 {
 204    if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
 205       exit(1);
 206
 207    graw_util_default_state(&info, FALSE);
 208
 209    graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 10000);
 210
 211    init_tex();
 212
 213    set_vertex_shader();
 214    set_fragment_shader();
 215 }
 216
 217
 218 int main( int argc, char *argv[] )
 219 {
 220    init();
 221
 222    graw_set_display_func( draw );
 223    graw_main_loop();
 224    return 0;
 225 }