1 /* Test texture swizzles */ 2 3 #include <stdio.h> 4 5 #include "graw_util.h" 6 7 8 static struct graw_info info; 9 10 static struct pipe_resource *texture = NULL; 11 static struct pipe_sampler_view *sv = NULL; 12 static void *sampler = NULL; 13 14 static const int WIDTH = 300; 15 static const int HEIGHT = 300; 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 static void set_vertices(void) 39 { 40 struct pipe_vertex_element ve[2]; 41 struct pipe_vertex_buffer vbuf; 42 void *handle; 43 44 memset(ve, 0, sizeof ve); 45 46 ve[0].src_offset = Offset(struct vertex, position); 47 ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; 48 ve[1].src_offset = Offset(struct vertex, color); 49 ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; 50 51 handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve); 52 info.ctx->bind_vertex_elements_state(info.ctx, handle); 53 54 memset(&vbuf, 0, sizeof vbuf); 55 56 vbuf.stride = sizeof(struct vertex); 57 vbuf.buffer_offset = 0; 58 vbuf.buffer = pipe_buffer_create_with_data(info.ctx, 59 PIPE_BIND_VERTEX_BUFFER, 60 PIPE_USAGE_DEFAULT, 61 sizeof(vertices), 62 vertices); 63 64 info.ctx->set_vertex_buffers(info.ctx, 0, 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 SAMP[0]\n" 92 "DCL SVIEW[0], 2D, FLOAT\n" 93 " 0: TXP OUT[0], IN[0], SAMP[0], 2D\n" 94 " 2: END\n"; 95 96 handle = graw_parse_fragment_shader(info.ctx, text); 97 info.ctx->bind_fs_state(info.ctx, handle); 98 } 99 100 101 static void draw(void) 102 { 103 union pipe_color_union clear_color; 104 105 clear_color.f[0] = 0.5; 106 clear_color.f[1] = 0.5; 107 clear_color.f[2] = 0.5; 108 clear_color.f[3] = 1.0; 109 110 info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0); 111 util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4); 112 info.ctx->flush(info.ctx, NULL, 0); 113 114 graw_util_flush_front(&info); 115 } 116 117 118 119 static void 120 init_tex(const unsigned swizzle[4]) 121 { 122 #define SIZE 256 123 struct pipe_sampler_view sv_template; 124 ubyte tex2d[SIZE][SIZE][4]; 125 int s, t; 126 127 for (s = 0; s < SIZE; s++) { 128 for (t = 0; t < SIZE; t++) { 129 tex2d[t][s][0] = 0; /*B*/ 130 tex2d[t][s][1] = t; /*G*/ 131 tex2d[t][s][2] = s; /*R*/ 132 tex2d[t][s][3] = 1; /*A*/ 133 } 134 } 135 136 texture = graw_util_create_tex2d(&info, SIZE, SIZE, 137 PIPE_FORMAT_B8G8R8A8_UNORM, tex2d); 138 139 memset(&sv_template, 0, sizeof sv_template); 140 sv_template.format = texture->format; 141 sv_template.texture = texture; 142 sv_template.swizzle_r = swizzle[0]; 143 sv_template.swizzle_g = swizzle[1]; 144 sv_template.swizzle_b = swizzle[2]; 145 sv_template.swizzle_a = swizzle[3]; 146 sv = info.ctx->create_sampler_view(info.ctx, texture, &sv_template); 147 if (sv == NULL) 148 exit(5); 149 150 info.ctx->set_sampler_views(info.ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv); 151 152 sampler = graw_util_create_simple_sampler(&info, 153 PIPE_TEX_WRAP_REPEAT, 154 PIPE_TEX_FILTER_NEAREST); 155 156 info.ctx->bind_sampler_states(info.ctx, PIPE_SHADER_FRAGMENT, 157 0, 1, &sampler); 158 #undef SIZE 159 } 160 161 162 static void 163 init(const unsigned swizzle[4]) 164 { 165 if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE)) 166 exit(1); 167 168 graw_util_default_state(&info, FALSE); 169 170 graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 10000); 171 172 init_tex(swizzle); 173 174 set_vertices(); 175 set_vertex_shader(); 176 set_fragment_shader(); 177 } 178 179 180 static unsigned 181 char_to_swizzle(char c) 182 { 183 switch (c) { 184 case 'r': 185 return PIPE_SWIZZLE_X; 186 case 'g': 187 return PIPE_SWIZZLE_Y; 188 case 'b': 189 return PIPE_SWIZZLE_Z; 190 case 'a': 191 return PIPE_SWIZZLE_W; 192 case '0': 193 return PIPE_SWIZZLE_0; 194 case '1': 195 return PIPE_SWIZZLE_1; 196 default: 197 return PIPE_SWIZZLE_X; 198 } 199 } 200 201 202 int main(int argc, char *argv[]) 203 { 204 const char swizzle_names[] = "rgba01"; 205 uint swizzle[4]; 206 int i; 207 208 swizzle[0] = PIPE_SWIZZLE_X; 209 swizzle[1] = PIPE_SWIZZLE_Y; 210 swizzle[2] = PIPE_SWIZZLE_Z; 211 swizzle[3] = PIPE_SWIZZLE_W; 212 213 for (i = 1; i < argc; i++) { 214 swizzle[i-1] = char_to_swizzle(argv[i][0]); 215 } 216 217 printf("Example:\n"); 218 printf(" tex-swizzle r 0 g 1\n"); 219 printf("Current swizzle = "); 220 for (i = 0; i < 4; i++) { 221 printf("%c", swizzle_names[swizzle[i]]); 222 } 223 printf("\n"); 224 225 init(swizzle); 226 227 graw_set_display_func(draw); 228 graw_main_loop(); 229 return 0; 230 } 231
