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 <stdio.h> 6 #include "state_tracker/graw.h" 7 #include "pipe/p_screen.h" 8 #include "pipe/p_context.h" 9 #include "pipe/p_state.h" 10 #include "pipe/p_defines.h" 11 12 #include "util/u_memory.h" /* Offset() */ 13 #include "util/u_draw_quad.h" 14 #include "util/u_inlines.h" 15 16 enum pipe_format formats[] = { 17 PIPE_FORMAT_R8G8B8A8_UNORM, 18 PIPE_FORMAT_B8G8R8A8_UNORM, 19 PIPE_FORMAT_NONE 20 }; 21 22 static const int WIDTH = 300; 23 static const int HEIGHT = 300; 24 25 static struct pipe_screen *screen = NULL; 26 static struct pipe_context *ctx = NULL; 27 static struct pipe_surface *surf = NULL; 28 static struct pipe_resource *tex = NULL; 29 static void *window = NULL; 30 31 struct vertex { 32 float position[4]; 33 float color[4]; 34 }; 35 36 static struct vertex vertices[4] = 37 { 38 { { 0.0f, -0.9f, 0.0f, 1.0f }, 39 { 1.0f, 0.0f, 0.0f, 1.0f } 40 }, 41 { { -0.9f, 0.9f, 0.0f, 1.0f }, 42 { 0.0f, 1.0f, 0.0f, 1.0f } 43 }, 44 { { 0.9f, 0.9f, 0.0f, 1.0f }, 45 { 0.0f, 0.0f, 1.0f, 1.0f } 46 } 47 }; 48 49 50 51 52 static void set_viewport( float x, float y, 53 float width, float height, 54 float near, float far) 55 { 56 float z = far; 57 float half_width = (float)width / 2.0f; 58 float half_height = (float)height / 2.0f; 59 float half_depth = ((float)far - (float)near) / 2.0f; 60 struct pipe_viewport_state vp; 61 62 vp.scale[0] = half_width; 63 vp.scale[1] = half_height; 64 vp.scale[2] = half_depth; 65 vp.scale[3] = 1.0f; 66 67 vp.translate[0] = half_width + x; 68 vp.translate[1] = half_height + y; 69 vp.translate[2] = half_depth + z; 70 vp.translate[3] = 0.0f; 71 72 ctx->set_viewport_state( ctx, &vp ); 73 } 74 75 static void set_vertices( void ) 76 { 77 struct pipe_vertex_element ve[2]; 78 struct pipe_vertex_buffer vbuf; 79 void *handle; 80 81 memset(ve, 0, sizeof ve); 82 83 ve[0].src_offset = Offset(struct vertex, position); 84 ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; 85 ve[1].src_offset = Offset(struct vertex, color); 86 ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; 87 88 handle = ctx->create_vertex_elements_state(ctx, 2, ve); 89 ctx->bind_vertex_elements_state(ctx, handle); 90 91 92 vbuf.stride = sizeof( struct vertex ); 93 vbuf.buffer_offset = 0; 94 vbuf.buffer = pipe_buffer_create_with_data(ctx, 95 PIPE_BIND_VERTEX_BUFFER, 96 PIPE_USAGE_STATIC, 97 sizeof(vertices), 98 vertices); 99 100 ctx->set_vertex_buffers(ctx, 1, &vbuf); 101 } 102 103 static void set_vertex_shader( void ) 104 { 105 void *handle; 106 const char *text = 107 "VERT\n" 108 "DCL IN[0]\n" 109 "DCL IN[1]\n" 110 "DCL OUT[0], POSITION\n" 111 "DCL OUT[1], COLOR\n" 112 " 0: MOV OUT[1], IN[1]\n" 113 " 1: MOV OUT[0], IN[0]\n" 114 " 2: END\n"; 115 116 handle = graw_parse_vertex_shader(ctx, text); 117 ctx->bind_vs_state(ctx, handle); 118 } 119 120 static void set_fragment_shader( void ) 121 { 122 void *handle; 123 const char *text = 124 "FRAG\n" 125 "DCL IN[0], COLOR, LINEAR\n" 126 "DCL OUT[0], COLOR\n" 127 " 0: MOV OUT[0], IN[0]\n" 128 " 1: END\n"; 129 130 handle = graw_parse_fragment_shader(ctx, text); 131 ctx->bind_fs_state(ctx, handle); 132 } 133 134 135 static void set_geometry_shader( void ) 136 { 137 void *handle; 138 const char *text = 139 "GEOM\n" 140 "PROPERTY GS_INPUT_PRIMITIVE TRIANGLES\n" 141 "PROPERTY GS_OUTPUT_PRIMITIVE TRIANGLE_STRIP\n" 142 "DCL IN[][0], POSITION, CONSTANT\n" 143 "DCL IN[][1], COLOR, CONSTANT\n" 144 "DCL OUT[0], POSITION, CONSTANT\n" 145 "DCL OUT[1], COLOR, CONSTANT\n" 146 "0:MOV OUT[0], IN[0][0]\n" 147 "1:MOV OUT[1], IN[0][1]\n" 148 "2:EMIT\n" 149 "3:MOV OUT[0], IN[1][0]\n" 150 "4:MOV OUT[1], IN[0][1]\n" /* copy color from input vertex 0 */ 151 "5:EMIT\n" 152 "6:MOV OUT[0], IN[2][0]\n" 153 "7:MOV OUT[1], IN[2][1]\n" 154 "8:EMIT\n" 155 "9:ENDPRIM\n" 156 "10:END\n"; 157 158 handle = graw_parse_geometry_shader(ctx, text); 159 ctx->bind_gs_state(ctx, handle); 160 } 161 162 static void draw( void ) 163 { 164 union pipe_color_union clear_color = { {1,0,1,1} }; 165 166 ctx->clear(ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0); 167 util_draw_arrays(ctx, PIPE_PRIM_TRIANGLES, 0, 3); 168 ctx->flush(ctx, NULL); 169 170 screen->flush_frontbuffer(screen, tex, 0, 0, window); 171 } 172 173 174 static void init( void ) 175 { 176 struct pipe_framebuffer_state fb; 177 struct pipe_resource templat; 178 struct pipe_surface surf_tmpl; 179 int i; 180 181 /* It's hard to say whether window or screen should be created 182 * first. Different environments would prefer one or the other. 183 * 184 * Also, no easy way of querying supported formats if the screen 185 * cannot be created first. 186 */ 187 for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) { 188 screen = graw_create_window_and_screen(0, 0, 300, 300, 189 formats[i], 190 &window); 191 if (window && screen) 192 break; 193 } 194 if (!screen || !window) { 195 fprintf(stderr, "Unable to create window\n"); 196 exit(1); 197 } 198 199 ctx = screen->context_create(screen, NULL); 200 if (ctx == NULL) 201 exit(3); 202 203 templat.target = PIPE_TEXTURE_2D; 204 templat.format = formats[i]; 205 templat.width0 = WIDTH; 206 templat.height0 = HEIGHT; 207 templat.depth0 = 1; 208 templat.array_size = 1; 209 templat.last_level = 0; 210 templat.nr_samples = 1; 211 templat.bind = (PIPE_BIND_RENDER_TARGET | 212 PIPE_BIND_DISPLAY_TARGET); 213 214 tex = screen->resource_create(screen, 215 &templat); 216 if (tex == NULL) 217 exit(4); 218 219 surf_tmpl.format = templat.format; 220 surf_tmpl.usage = PIPE_BIND_RENDER_TARGET; 221 surf_tmpl.u.tex.level = 0; 222 surf_tmpl.u.tex.first_layer = 0; 223 surf_tmpl.u.tex.last_layer = 0; 224 surf = ctx->create_surface(ctx, tex, &surf_tmpl); 225 if (surf == NULL) 226 exit(5); 227 228 memset(&fb, 0, sizeof fb); 229 fb.nr_cbufs = 1; 230 fb.width = WIDTH; 231 fb.height = HEIGHT; 232 fb.cbufs[0] = surf; 233 234 ctx->set_framebuffer_state(ctx, &fb); 235 236 { 237 struct pipe_blend_state blend; 238 void *handle; 239 memset(&blend, 0, sizeof blend); 240 blend.rt[0].colormask = PIPE_MASK_RGBA; 241 handle = ctx->create_blend_state(ctx, &blend); 242 ctx->bind_blend_state(ctx, handle); 243 } 244 245 { 246 struct pipe_depth_stencil_alpha_state depthstencil; 247 void *handle; 248 memset(&depthstencil, 0, sizeof depthstencil); 249 handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil); 250 ctx->bind_depth_stencil_alpha_state(ctx, handle); 251 } 252 253 { 254 struct pipe_rasterizer_state rasterizer; 255 void *handle; 256 memset(&rasterizer, 0, sizeof rasterizer); 257 rasterizer.cull_face = PIPE_FACE_NONE; 258 rasterizer.gl_rasterization_rules = 1; 259 rasterizer.depth_clip = 1; 260 handle = ctx->create_rasterizer_state(ctx, &rasterizer); 261 ctx->bind_rasterizer_state(ctx, handle); 262 } 263 264 set_viewport(0, 0, WIDTH, HEIGHT, 30, 1000); 265 set_vertices(); 266 set_vertex_shader(); 267 set_fragment_shader(); 268 set_geometry_shader(); 269 } 270 271 272 int main( int argc, char *argv[] ) 273 { 274 init(); 275 276 graw_set_display_func( draw ); 277 graw_main_loop(); 278 return 0; 279 } 280
