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