/* Display a cleared blue window. This demo has no dependencies on
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* any utility code, just the graw interface and gallium.
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*/
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#include "graw_util.h"
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static const int WIDTH = 300;
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static const int HEIGHT = 300;
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static struct graw_info info;
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static struct pipe_resource *texture = NULL;
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static struct pipe_sampler_view *sv = NULL;
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static void *sampler = NULL;
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struct vertex {
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float position[4];
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float color[4];
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};
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static struct vertex vertices[] =
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{
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{ { 0.9, -0.9, 0.0, 1.0 },
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{ 1, 0, 0, 1 } },
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{ { 0.9, 0.9, 0.0, 1.0 },
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{ 1, 1, 0, 1 } },
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{ {-0.9, 0.9, 0.0, 1.0 },
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{ 0, 1, 0, 1 } },
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{ {-0.9, -0.9, 0.0, 1.0 },
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{ 0, 0, 0, 1 } },
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};
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static void set_vertices( void )
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{
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struct pipe_vertex_element ve[2];
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struct pipe_vertex_buffer vbuf;
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void *handle;
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memset(ve, 0, sizeof ve);
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ve[0].src_offset = Offset(struct vertex, position);
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ve[0].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
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ve[1].src_offset = Offset(struct vertex, color);
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ve[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
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handle = info.ctx->create_vertex_elements_state(info.ctx, 2, ve);
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info.ctx->bind_vertex_elements_state(info.ctx, handle);
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memset(&vbuf, 0, sizeof vbuf);
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vbuf.stride = sizeof( struct vertex );
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vbuf.buffer_offset = 0;
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vbuf.buffer.resource = pipe_buffer_create_with_data(info.ctx,
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PIPE_BIND_VERTEX_BUFFER,
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PIPE_USAGE_DEFAULT,
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sizeof(vertices),
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vertices);
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info.ctx->set_vertex_buffers(info.ctx, 0, 1, &vbuf);
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}
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static void set_vertex_shader( void )
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{
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void *handle;
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const char *text =
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"VERT\n"
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"DCL IN[0]\n"
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"DCL IN[1]\n"
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"DCL OUT[0], POSITION\n"
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"DCL OUT[1], GENERIC[0]\n"
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" 0: MOV OUT[1], IN[1]\n"
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" 1: MOV OUT[0], IN[0]\n"
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" 2: END\n";
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handle = graw_parse_vertex_shader(info.ctx, text);
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info.ctx->bind_vs_state(info.ctx, handle);
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}
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static void set_fragment_shader( void )
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{
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void *handle;
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const char *text =
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"FRAG\n"
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"DCL IN[0], GENERIC[0], PERSPECTIVE\n"
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"DCL OUT[0], COLOR\n"
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"DCL TEMP[0]\n"
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"DCL SAMP[0]\n"
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"DCL SVIEW[0], 2D, FLOAT\n"
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" 0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"
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" 1: MOV OUT[0], TEMP[0]\n"
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" 2: END\n";
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handle = graw_parse_fragment_shader(info.ctx, text);
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info.ctx->bind_fs_state(info.ctx, handle);
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}
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static void draw( void )
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{
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union pipe_color_union clear_color = { {.5,.5,.5,1} };
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info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);
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util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);
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info.ctx->flush(info.ctx, NULL, 0);
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graw_save_surface_to_file(info.ctx, info.color_surf[0], NULL);
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graw_util_flush_front(&info);
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}
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#define SIZE 16
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static void init_tex( void )
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{
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ubyte tex2d[SIZE][SIZE][4];
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int s, t;
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#if (SIZE != 2)
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for (s = 0; s < SIZE; s++) {
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for (t = 0; t < SIZE; t++) {
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if (0) {
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int x = (s ^ t) & 1;
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tex2d[t][s][0] = (x) ? 0 : 63;
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tex2d[t][s][1] = (x) ? 0 : 128;
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tex2d[t][s][2] = 0;
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tex2d[t][s][3] = 0xff;
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}
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else {
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int x = ((s ^ t) >> 2) & 1;
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tex2d[t][s][0] = s*255/(SIZE-1);
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tex2d[t][s][1] = t*255/(SIZE-1);
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tex2d[t][s][2] = (x) ? 0 : 128;
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tex2d[t][s][3] = 0xff;
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}
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}
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}
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#else
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tex2d[0][0][0] = 0;
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tex2d[0][0][1] = 255;
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tex2d[0][0][2] = 255;
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tex2d[0][0][3] = 0;
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tex2d[0][1][0] = 0;
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tex2d[0][1][1] = 0;
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tex2d[0][1][2] = 255;
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tex2d[0][1][3] = 255;
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tex2d[1][0][0] = 255;
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tex2d[1][0][1] = 255;
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tex2d[1][0][2] = 0;
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tex2d[1][0][3] = 255;
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tex2d[1][1][0] = 255;
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tex2d[1][1][1] = 0;
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tex2d[1][1][2] = 0;
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tex2d[1][1][3] = 255;
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#endif
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texture = graw_util_create_tex2d(&info, SIZE, SIZE,
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PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);
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sv = graw_util_create_simple_sampler_view(&info, texture);
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info.ctx->set_sampler_views(info.ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv);
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sampler = graw_util_create_simple_sampler(&info,
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PIPE_TEX_WRAP_REPEAT,
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PIPE_TEX_FILTER_NEAREST);
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info.ctx->bind_sampler_states(info.ctx, PIPE_SHADER_FRAGMENT,
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0, 1, &sampler);
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}
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static void init( void )
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{
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if (!graw_util_create_window(&info, WIDTH, HEIGHT, 1, FALSE))
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exit(1);
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graw_util_default_state(&info, FALSE);
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{
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struct pipe_rasterizer_state rasterizer;
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void *handle;
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memset(&rasterizer, 0, sizeof rasterizer);
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rasterizer.cull_face = PIPE_FACE_NONE;
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rasterizer.half_pixel_center = 1;
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rasterizer.bottom_edge_rule = 1;
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rasterizer.depth_clip = 1;
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handle = info.ctx->create_rasterizer_state(info.ctx, &rasterizer);
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info.ctx->bind_rasterizer_state(info.ctx, handle);
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}
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graw_util_viewport(&info, 0, 0, WIDTH, HEIGHT, 30, 1000);
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init_tex();
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set_vertices();
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set_vertex_shader();
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set_fragment_shader();
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}
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static void args(int argc, char *argv[])
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{
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int i;
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for (i = 1; i < argc;) {
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if (graw_parse_args(&i, argc, argv)) {
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continue;
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}
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exit(1);
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}
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}
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int main( int argc, char *argv[] )
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{
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args(argc, argv);
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init();
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graw_set_display_func( draw );
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graw_main_loop();
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return 0;
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}
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