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    memset(&vbuf, 0, sizeof vbuf);
  73
  74    vbuf.stride = sizeof(struct vertex);
  75    vbuf.buffer_offset = 0;
  76    vbuf.buffer.resource = pipe_buffer_create_with_data(info.ctx,
  77                                               PIPE_BIND_VERTEX_BUFFER,
  78                                               PIPE_USAGE_DEFAULT,
  79                                               num_verts * sizeof(struct vertex),
  80                                               verts);
  81
  82    info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf);
  83 }
  84
  85 static void set_vertex_shader( void )
  86 {
  87    void *handle;
  88    const char *text =
  89       "VERT\n"
  90       "DCL IN[0]\n"
  91       "DCL IN[1]\n"
  92       "DCL OUT[0], POSITION\n"
  93       "DCL OUT[1], GENERIC[0]\n"
  94       "  0: MOV OUT[1], IN[1]\n"
  95       "  1: MOV OUT[0], IN[0]\n"
  96       "  2: END\n";
  97
  98    handle = graw_parse_vertex_shader(info.ctx, text);
  99    info.ctx->bind_vs_state(info.ctx, handle);
 100 }
 101
 102 static void set_fragment_shader( void )
 103 {
 104    void *handle;
 105    const char *text =
 106       "FRAG\n"
 107       "DCL IN[0], GENERIC[0], PERSPECTIVE\n"
 108       "DCL OUT[0], COLOR\n"
 109       "DCL TEMP[0]\n"
 110       "DCL SAMP[0]\n"
 111       "DCL SVIEW[0], 2D, FLOAT\n"
 112       "  0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
 113       "  1: MOV OUT[0], TEMP[0]\n"
 114       "  2: END\n";
 115
 116    handle = graw_parse_fragment_shader(info.ctx, text);
 117    info.ctx->bind_fs_state(info.ctx, handle);
 118 }
 119
 120
 121 static void draw( void )
 122 {
 123    union pipe_color_union clear_color;
 124
 125    clear_color.f[0] = 0.5;
 126    clear_color.f[1] = 0.5;
 127    clear_color.f[2] = 0.5;
 128    clear_color.f[3] = 1.0;
 129
 130    info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
 131
 132    info.ctx->set_sampler_views(info.ctx, PIPE_SHADER_FRAGMENT, 0, 1, &linear_sv);
 133    set_vertices(vertices1, 4);
 134    util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
 135
 136    info.ctx->set_sampler_views(info.ctx, PIPE_SHADER_FRAGMENT, 0, 1, &srgb_sv);
 137    set_vertices(vertices2, 4);
 138    util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
 139
 140    info.ctx->flush(info.ctx, NULL, 0);
 141
 142    graw_util_flush_front(&info);
 143 }
 144
 145
 146 static void init_tex( void )
 147 {
 148 #define SIZE 64
 149    ubyte tex2d[SIZE][SIZE][4];
 150    int s, t;
 151
 152    for (s = 0; s < SIZE; s++) {
 153       for (t = 0; t < SIZE; t++) {
 154          tex2d[t][s][0] = 0;
 155          tex2d[t][s][1] = s * 255 / SIZE;
 156          tex2d[t][s][2] = t * 255 / SIZE;
 157          tex2d[t][s][3] = 255;
 158       }
 159    }
 160
 161    texture = graw_util_create_tex2d(&info, SIZE, SIZE,
 162                                     PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
 163
 164    {
 165       void *sampler;
 166       sampler = graw_util_create_simple_sampler(&info,
 167                                                 PIPE_TEX_WRAP_REPEAT,
 168                                                 PIPE_TEX_FILTER_NEAREST);
 169       info.ctx->bind_sampler_states(info.ctx, PIPE_SHADER_FRAGMENT,
 170                                     0, 1, &sampler);
 171    }
 172
 173    /* linear sampler view */
 174    {
 175       struct pipe_sampler_view sv_temp;
 176       memset(&sv_temp, 0, sizeof sv_temp);
 177       sv_temp.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 178       sv_temp.texture = texture;
 179       sv_temp.swizzle_r = PIPE_SWIZZLE_X;
 180       sv_temp.swizzle_g = PIPE_SWIZZLE_Y;
 181       sv_temp.swizzle_b = PIPE_SWIZZLE_Z;
 182       sv_temp.swizzle_a = PIPE_SWIZZLE_W;
 183       linear_sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_temp);
 184       if (linear_sv == NULL)
 185          exit(0);
 186    }
 187
 188    /* srgb sampler view */
 189    {
 190       struct pipe_sampler_view sv_temp;
 191       memset(&sv_temp, 0, sizeof sv_temp);
 192       sv_temp.format = PIPE_FORMAT_B8G8R8A8_SRGB;
 193       sv_temp.texture = texture;
 194       sv_temp.swizzle_r = PIPE_SWIZZLE_X;
 195       sv_temp.swizzle_g = PIPE_SWIZZLE_Y;
 196       sv_temp.swizzle_b = PIPE_SWIZZLE_Z;
 197       sv_temp.swizzle_a = PIPE_SWIZZLE_W;
 198       srgb_sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_temp);
 199       if (srgb_sv == NULL)
 200          exit(0);
 201    }
 202 #undef SIZE
 203 }
 204
 205 static void init( void )
 206 {
 207    if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
 208       exit(1);
 209
 210    graw_util_default_state(&info, FALSE);
 211
 212    graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 10000);
 213
 214    init_tex();
 215
 216    set_vertex_shader();
 217    set_fragment_shader();
 218 }
 219
 220
 221 int main( int argc, char *argv[] )
 222 {
 223    init();
 224
 225    graw_set_display_func( draw );
 226    graw_main_loop();
 227    return 0;
 228 }