Subversion Repositories Kolibri OS

/* Display a cleared blue window.  This demo has no dependencies on

 * any utility code, just the graw interface and gallium.

 */

#include "graw_util.h"

static const int WIDTH = 300;

static const int HEIGHT = 300;

static struct graw_info info;

static struct pipe_resource *texture = NULL;

static struct pipe_sampler_view *sv = NULL;

static void *sampler = NULL;

struct vertex {

   float position[4];

   float color[4];

};

static struct vertex vertices[] =

{

   { { 0.9, -0.9, 0.0, 1.0 },

     { 1, 0, 0, 1 } },

   { { 0.9,  0.9, 0.0, 1.0 },

     { 1, 1, 0, 1 } },

   { {-0.9,  0.9, 0.0, 1.0 },

     { 0, 1, 0, 1 } },

   { {-0.9,  -0.9, 0.0, 1.0 },

     { 0, 0, 0, 1 } },

};

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_DEFAULT,

                                              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], GENERIC[0]\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], GENERIC[0], PERSPECTIVE\n"

      "DCL OUT[0], COLOR\n"

      "DCL TEMP[0]\n"

      "DCL SAMP[0]\n"

      "  0: TXP TEMP[0], IN[0], SAMP[0], 2D\n"

      "  1: MOV OUT[0], TEMP[0]\n"

      "  2: 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 = { {.5,.5,.5,1} };

   info.ctx->clear(info.ctx, PIPE_CLEAR_COLOR, &clear_color, 0, 0);

   util_draw_arrays(info.ctx, PIPE_PRIM_QUADS, 0, 4);

   info.ctx->flush(info.ctx, NULL, 0);

   graw_save_surface_to_file(info.ctx, info.color_surf[0], NULL);

   graw_util_flush_front(&info);

}

#define SIZE 16

static void init_tex( void )

{

   ubyte tex2d[SIZE][SIZE][4];

   int s, t;

#if (SIZE != 2)

   for (s = 0; s < SIZE; s++) {

      for (t = 0; t < SIZE; t++) {

         if (0) {

            int x = (s ^ t) & 1;

	    tex2d[t][s][0] = (x) ? 0 : 63;

	    tex2d[t][s][1] = (x) ? 0 : 128;

	    tex2d[t][s][2] = 0;

	    tex2d[t][s][3] = 0xff;

         }

         else {

            int x = ((s ^ t) >> 2) & 1;

	    tex2d[t][s][0] = s*255/(SIZE-1);

	    tex2d[t][s][1] = t*255/(SIZE-1);

	    tex2d[t][s][2] = (x) ? 0 : 128;

	    tex2d[t][s][3] = 0xff;

         }

      }

   }

#else

   tex2d[0][0][0] = 0;

   tex2d[0][0][1] = 255;

   tex2d[0][0][2] = 255;

   tex2d[0][0][3] = 0;

   tex2d[0][1][0] = 0;

   tex2d[0][1][1] = 0;

   tex2d[0][1][2] = 255;

   tex2d[0][1][3] = 255;

   tex2d[1][0][0] = 255;

   tex2d[1][0][1] = 255;

   tex2d[1][0][2] = 0;

   tex2d[1][0][3] = 255;

   tex2d[1][1][0] = 255;

   tex2d[1][1][1] = 0;

   tex2d[1][1][2] = 0;

   tex2d[1][1][3] = 255;

#endif

   texture = graw_util_create_tex2d(&info, SIZE, SIZE,

                                    PIPE_FORMAT_B8G8R8A8_UNORM, tex2d);

   sv = graw_util_create_simple_sampler_view(&info, texture);

   info.ctx->set_sampler_views(info.ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sv);

   sampler = graw_util_create_simple_sampler(&info,

                                             PIPE_TEX_WRAP_REPEAT,

                                             PIPE_TEX_FILTER_NEAREST);

   info.ctx->bind_sampler_states(info.ctx, PIPE_SHADER_FRAGMENT,

                                 0, 1, &sampler);

}

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.half_pixel_center = 1;

      rasterizer.bottom_edge_rule = 1;

      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);

   init_tex();

   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)) {

         continue;

      }

      exit(1);

   }

}

int main( int argc, char *argv[] )

{

   args(argc, argv);

   init();

   graw_set_display_func( draw );

   graw_main_loop();

   return 0;

}