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 "state_tracker/graw.h"

#include "pipe/p_screen.h"

#include "pipe/p_context.h"

#include "pipe/p_shader_tokens.h"

#include "pipe/p_state.h"

#include "pipe/p_defines.h"

#include "util/u_debug.h"       /* debug_dump_surface_bmp() */

#include "util/u_inlines.h"

#include "util/u_memory.h"      /* Offset() */

#include "util/u_draw_quad.h"

#include "util/u_box.h"

#include 

enum pipe_format formats[] = {

   PIPE_FORMAT_RGBA8888_UNORM,

   PIPE_FORMAT_BGRA8888_UNORM,

   PIPE_FORMAT_NONE

};

static const int WIDTH = 300;

static const int HEIGHT = 300;

static struct pipe_screen *screen = NULL;

static struct pipe_context *ctx = NULL;

static struct pipe_resource *rttex = NULL;

static struct pipe_resource *samptex = NULL;

static struct pipe_surface *surf = NULL;

static struct pipe_sampler_view *sv = NULL;

static void *sampler = NULL;

static void *window = 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_viewport( float x, float y,

                          float width, float height,

                          float zNear, float zFar)

{

   float z = zFar;

   float half_width = (float)width / 2.0f;

   float half_height = (float)height / 2.0f;

   float half_depth = ((float)zFar - (float)zNear) / 2.0f;

   struct pipe_viewport_state vp;

   vp.scale[0] = half_width;

   vp.scale[1] = half_height;

   vp.scale[2] = half_depth;

   vp.translate[0] = half_width + x;

   vp.translate[1] = half_height + y;

   vp.translate[2] = half_depth + z;

   ctx->set_viewport_states( ctx, 0, 1, &vp );

}

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 = ctx->create_vertex_elements_state(ctx, 2, ve);

   ctx->bind_vertex_elements_state(ctx, handle);

   memset(&vbuf, 0, sizeof vbuf);

   vbuf.stride = sizeof( struct vertex );

   vbuf.buffer_offset = 0;

   vbuf.buffer = pipe_buffer_create_with_data(ctx,

                                              PIPE_BIND_VERTEX_BUFFER,

                                              PIPE_USAGE_DEFAULT,

                                              sizeof(vertices),

                                              vertices);

   ctx->set_vertex_buffers(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(ctx, text);

   ctx->bind_vs_state(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"

      "DCL RES[0], 2D, FLOAT\n"

      "  0: SAMPLE TEMP[0], IN[0], RES[0], SAMP[0]\n"

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

      "  2: END\n";

   handle = graw_parse_fragment_shader(ctx, text);

   ctx->bind_fs_state(ctx, handle);

}

static void draw( void )

{

   union pipe_color_union clear_color = { {.5,.5,.5,1} };

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

   util_draw_arrays(ctx, PIPE_PRIM_QUADS, 0, 4);

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

   graw_save_surface_to_file(ctx, surf, NULL);

   screen->flush_frontbuffer(screen, rttex, 0, 0, window, NULL);

}

#define SIZE 16

static void init_tex( void )

{

   struct pipe_sampler_view sv_template;

   struct pipe_sampler_state sampler_desc;

   struct pipe_resource templat;

   struct pipe_box box;

   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

   templat.target = PIPE_TEXTURE_2D;

   templat.format = PIPE_FORMAT_B8G8R8A8_UNORM;

   templat.width0 = SIZE;

   templat.height0 = SIZE;

   templat.depth0 = 1;

   templat.last_level = 0;

   templat.nr_samples = 1;

   templat.bind = PIPE_BIND_SAMPLER_VIEW;

   samptex = screen->resource_create(screen,

                                 &templat);

   if (samptex == NULL)

      exit(4);

   u_box_2d(0,0,SIZE,SIZE, &box);

   ctx->transfer_inline_write(ctx,

                              samptex,

                              0,

                              PIPE_TRANSFER_WRITE,

                              &box,

                              tex2d,

                              sizeof tex2d[0],

                              sizeof tex2d);

   /* Possibly read back & compare against original data:

    */

   if (0)

   {

      struct pipe_transfer *t;

      uint32_t *ptr;

      ptr = pipe_transfer_map(ctx, samptex,

                              0, 0, /* level, layer */

                              PIPE_TRANSFER_READ,

                              0, 0, SIZE, SIZE, &t); /* x, y, width, height */

      if (memcmp(ptr, tex2d, sizeof tex2d) != 0) {

         assert(0);

         exit(9);

      }

      ctx->transfer_unmap(ctx, t);

   }

   memset(&sv_template, 0, sizeof sv_template);

   sv_template.format = samptex->format;

   sv_template.texture = samptex;

   sv_template.swizzle_r = 0;

   sv_template.swizzle_g = 1;

   sv_template.swizzle_b = 2;

   sv_template.swizzle_a = 3;

   sv = ctx->create_sampler_view(ctx, samptex, &sv_template);

   if (sv == NULL)

      exit(5);

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

   memset(&sampler_desc, 0, sizeof sampler_desc);

   sampler_desc.wrap_s = PIPE_TEX_WRAP_REPEAT;

   sampler_desc.wrap_t = PIPE_TEX_WRAP_REPEAT;

   sampler_desc.wrap_r = PIPE_TEX_WRAP_REPEAT;

   sampler_desc.min_img_filter = PIPE_TEX_FILTER_NEAREST;

   sampler_desc.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;

   sampler_desc.mag_img_filter = PIPE_TEX_FILTER_NEAREST;

   sampler_desc.compare_mode = PIPE_TEX_COMPARE_NONE;

   sampler_desc.compare_func = 0;

   sampler_desc.normalized_coords = 1;

   sampler_desc.max_anisotropy = 0;

   sampler = ctx->create_sampler_state(ctx, &sampler_desc);

   if (sampler == NULL)

      exit(6);

   ctx->bind_sampler_states(ctx, PIPE_SHADER_FRAGMENT, 0, 1, &sampler);

}

static void init( void )

{

   struct pipe_framebuffer_state fb;

   struct pipe_resource templat;

   struct pipe_surface surf_tmpl;

   int i;

   /* It's hard to say whether window or screen should be created

    * first.  Different environments would prefer one or the other.

    *

    * Also, no easy way of querying supported formats if the screen

    * cannot be created first.

    */

   for (i = 0; formats[i] != PIPE_FORMAT_NONE; i++) {

      screen = graw_create_window_and_screen(0, 0, 300, 300,

                                             formats[i],

                                             &window);

      if (window && screen)

         break;

   }

   if (!screen || !window) {

      fprintf(stderr, "Unable to create window\n");

      exit(1);

   }

   ctx = screen->context_create(screen, NULL);

   if (ctx == NULL)

      exit(3);

   templat.target = PIPE_TEXTURE_2D;

   templat.format = formats[i];

   templat.width0 = WIDTH;

   templat.height0 = HEIGHT;

   templat.depth0 = 1;

   templat.array_size = 1;

   templat.last_level = 0;

   templat.nr_samples = 1;

   templat.bind = (PIPE_BIND_RENDER_TARGET |

                   PIPE_BIND_DISPLAY_TARGET);

   rttex = screen->resource_create(screen,

                                 &templat);

   if (rttex == NULL)

      exit(4);

   surf_tmpl.format = templat.format;

   surf_tmpl.u.tex.level = 0;

   surf_tmpl.u.tex.first_layer = 0;

   surf_tmpl.u.tex.last_layer = 0;

   surf = ctx->create_surface(ctx, rttex, &surf_tmpl);

   if (surf == NULL)

      exit(5);

   memset(&fb, 0, sizeof fb);

   fb.nr_cbufs = 1;

   fb.width = WIDTH;

   fb.height = HEIGHT;

   fb.cbufs[0] = surf;

   ctx->set_framebuffer_state(ctx, &fb);

   {

      struct pipe_blend_state blend;

      void *handle;

      memset(&blend, 0, sizeof blend);

      blend.rt[0].colormask = PIPE_MASK_RGBA;

      handle = ctx->create_blend_state(ctx, &blend);

      ctx->bind_blend_state(ctx, handle);

   }

   {

      struct pipe_depth_stencil_alpha_state depthstencil;

      void *handle;

      memset(&depthstencil, 0, sizeof depthstencil);

      handle = ctx->create_depth_stencil_alpha_state(ctx, &depthstencil);

      ctx->bind_depth_stencil_alpha_state(ctx, handle);

   }

   {

      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 = ctx->create_rasterizer_state(ctx, &rasterizer);

      ctx->bind_rasterizer_state(ctx, handle);

   }

   set_viewport(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;

}