/* Display a cleared blue window. This demo has no dependencies on * any utility code, just the graw interface and gallium. */ #include <stdio.h> #include "graw_util.h" static struct graw_info info; static const int WIDTH = 300; static const int HEIGHT = 300; struct vertex { float position[4]; float color[4]; }; static boolean FlatShade = FALSE; static struct vertex vertices[3] = { { { 0.0f, -0.9f, 0.0f, 1.0f }, { 1.0f, 0.0f, 0.0f, 1.0f } }, { { -0.9f, 0.9f, 0.0f, 1.0f }, { 0.0f, 1.0f, 0.0f, 1.0f } }, { { 0.9f, 0.9f, 0.0f, 1.0f }, { 0.0f, 0.0f, 1.0f, 1.0f } } }; static void set_vertices( void ) { struct pipe_vertex_element ve[2]; struct pipe_vertex_buffer vbuf; void *handle; memset(ve, 0, sizeof ve); ve[0].src_offset = Offset(struct vertex, position); ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; ve[1].src_offset = Offset(struct vertex, color); ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT; handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve); info.ctx->bind_vertex_elements_state(info.ctx, handle); memset(&vbuf, 0, sizeof vbuf); vbuf.stride = sizeof( struct vertex ); vbuf.buffer_offset = 0; vbuf.buffer = pipe_buffer_create_with_data(info.ctx, PIPE_BIND_VERTEX_BUFFER, PIPE_USAGE_STATIC, sizeof(vertices), vertices); info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf); } static void set_vertex_shader( void ) { void *handle; const char *text = "VERT\n" "DCL IN[0]\n" "DCL IN[1]\n" "DCL OUT[0], POSITION\n" "DCL OUT[1], COLOR\n" " 0: MOV OUT[1], IN[1]\n" " 1: MOV OUT[0], IN[0]\n" " 2: END\n"; handle = graw_parse_vertex_shader(info.ctx, text); info.ctx->bind_vs_state(info.ctx, handle); } static void set_fragment_shader( void ) { void *handle; const char *text = "FRAG\n" "DCL IN[0], COLOR, LINEAR\n" "DCL OUT[0], COLOR\n" " 0: MOV OUT[0], IN[0]\n" " 1: END\n"; handle = graw_parse_fragment_shader(info.ctx, text); info.ctx->bind_fs_state(info.ctx, handle); } static void draw( void ) { union pipe_color_union clear_color = { {1,0,1,1} }; info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0); util_draw_arrays(info.ctx, PIPE_PRIM_TRIANGLES, 0, 3); info.ctx->flush(info.ctx, NULL); graw_save_surface_to_file(info.ctx, info.color_surf[0], NULL); graw_util_flush_front(&info); } static void init( void ) { if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE)) exit(1); graw_util_default_state(&info, FALSE); { struct pipe_rasterizer_state rasterizer; void *handle; memset(&rasterizer, 0, sizeof rasterizer); rasterizer.cull_face = PIPE_FACE_NONE; rasterizer.gl_rasterization_rules = 1; rasterizer.flatshade = FlatShade; rasterizer.depth_clip = 1; handle = info.ctx->create_rasterizer_state(info.ctx, &rasterizer); info.ctx->bind_rasterizer_state(info.ctx, handle); } graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 1000); set_vertices(); set_vertex_shader(); set_fragment_shader(); } static void args(int argc, char *argv[]) { int i; for (i = 1; i < argc; ) { if (graw_parse_args(&i, argc, argv)) { /* ok */ } else if (strcmp(argv[i], "-f") == 0) { FlatShade = TRUE; i++; } else { printf("Invalid arg %s\n", argv[i]); exit(1); } } } int main( int argc, char *argv[] ) { args(argc, argv); init(); graw_set_display_func( draw ); graw_main_loop(); return 0; }