src/gallium/state_trackers/python/p_texture.i

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   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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  27
  28 /**
  29  * @file
  30  * SWIG interface definion for Gallium types.
  31  *
  32  * @author Jose Fonseca <jrfonseca@tungstengraphics.com>
  33  */
  34
  35
  36 %nodefaultctor pipe_texture;
  37 %nodefaultctor pipe_surface;
  38 %nodefaultctor st_buffer;
  39
  40 %nodefaultdtor pipe_texture;
  41 %nodefaultdtor pipe_surface;
  42 %nodefaultdtor st_buffer;
  43
  44 %ignore pipe_texture::screen;
  45
  46 %ignore pipe_surface::winsys;
  47 %immutable pipe_surface::texture;
  48 %immutable pipe_surface::buffer;
  49
  50 %newobject pipe_texture::get_surface;
  51
  52
  53 %extend pipe_texture {
  54
  55    ~pipe_texture() {
  56       struct pipe_texture *ptr = $self;
  57       pipe_texture_reference(&ptr, NULL);
  58    }
  59
  60    unsigned get_width(unsigned level=0) {
  61       return $self->width[level];
  62    }
  63
  64    unsigned get_height(unsigned level=0) {
  65       return $self->height[level];
  66    }
  67
  68    unsigned get_depth(unsigned level=0) {
  69       return $self->depth[level];
  70    }
  71
  72    unsigned get_nblocksx(unsigned level=0) {
  73       return $self->nblocksx[level];
  74    }
  75
  76    unsigned get_nblocksy(unsigned level=0) {
  77       return $self->nblocksy[level];
  78    }
  79
  80    /** Get a surface which is a "view" into a texture */
  81    struct pipe_surface *
  82    get_surface(unsigned face=0, unsigned level=0, unsigned zslice=0, unsigned usage=0 )
  83    {
  84       struct pipe_screen *screen = $self->screen;
  85       return screen->get_tex_surface(screen, $self, face, level, zslice, usage);
  86    }
  87
  88 };
  89
  90
  91 %extend pipe_surface {
  92
  93    ~pipe_surface() {
  94       struct pipe_surface *ptr = $self;
  95       pipe_surface_reference(&ptr, NULL);
  96    }
  97
  98    // gets mapped to pipe_surface_map automatically
  99    void * map( unsigned flags );
 100
 101    // gets mapped to pipe_surface_unmap automatically
 102    void unmap( void );
 103
 104    void
 105    get_tile_raw(unsigned x, unsigned y, unsigned w, unsigned h, char *raw, unsigned stride) {
 106       pipe_get_tile_raw($self, x, y, w, h, raw, stride);
 107    }
 108
 109    void
 110    put_tile_raw(unsigned x, unsigned y, unsigned w, unsigned h, const char *raw, unsigned stride) {
 111       pipe_put_tile_raw($self, x, y, w, h, raw, stride);
 112    }
 113
 114    void
 115    get_tile_rgba(unsigned x, unsigned y, unsigned w, unsigned h, float *rgba) {
 116       pipe_get_tile_rgba($self, x, y, w, h, rgba);
 117    }
 118
 119    void
 120    put_tile_rgba(unsigned x, unsigned y, unsigned w, unsigned h, const float *rgba) {
 121       pipe_put_tile_rgba($self, x, y, w, h, rgba);
 122    }
 123
 124    %cstring_output_allocate_size(char **STRING, int *LENGTH, free(*$1));
 125    void
 126    get_tile_rgba8(unsigned x, unsigned y, unsigned w, unsigned h, char **STRING, int *LENGTH)
 127    {
 128       unsigned surface_usage;
 129       float *rgba;
 130       unsigned char *rgba8;
 131       unsigned i, j, k;
 132
 133       *LENGTH = 0;
 134       *STRING = NULL;
 135
 136       if (!$self)
 137          return;
 138
 139       *LENGTH = h*w*4;
 140       *STRING = (char *) malloc(*LENGTH);
 141       if(!*STRING)
 142          return;
 143
 144       rgba = malloc(w*4*sizeof(float));
 145       if(!rgba)
 146          return;
 147
 148       rgba8 = (unsigned char *) *STRING;
 149
 150       /* XXX: force mappable surface */
 151       surface_usage = $self->usage;
 152       $self->usage |= PIPE_BUFFER_USAGE_CPU_READ;
 153
 154       for(j = 0; j < h; ++j) {
 155          pipe_get_tile_rgba($self,
 156                             x, y + j, w, 1,
 157                             rgba);
 158          for(i = 0; i < w; ++i)
 159             for(k = 0; k <4; ++k)
 160                rgba8[j*w*4 + i*4 + k] = float_to_ubyte(rgba[i*4 + k]);
 161       }
 162
 163       $self->usage = surface_usage;
 164
 165       free(rgba);
 166    }
 167
 168    void
 169    get_tile_z(unsigned x, unsigned y, unsigned w, unsigned h, unsigned *z) {
 170       pipe_get_tile_z($self, x, y, w, h, z);
 171    }
 172
 173    void
 174    put_tile_z(unsigned x, unsigned y, unsigned w, unsigned h, const unsigned *z) {
 175       pipe_put_tile_z($self, x, y, w, h, z);
 176    }
 177
 178    void
 179    sample_rgba(float *rgba) {
 180       st_sample_surface($self, rgba);
 181    }
 182
 183    unsigned
 184    compare_tile_rgba(unsigned x, unsigned y, unsigned w, unsigned h, const float *rgba, float tol = 0.0)
 185    {
 186       float *rgba2;
 187       const float *p1;
 188       const float *p2;
 189       unsigned i, j, n;
 190
 191       rgba2 = MALLOC(h*w*4*sizeof(float));
 192       if(!rgba2)
 193          return ~0;
 194
 195       pipe_get_tile_rgba($self, x, y, w, h, rgba2);
 196
 197       p1 = rgba;
 198       p2 = rgba2;
 199       n = 0;
 200       for(i = h*w; i; --i) {
 201          unsigned differs = 0;
 202          for(j = 4; j; --j) {
 203             float delta = *p2++ - *p1++;
 204             if (delta < -tol || delta > tol)
 205                 differs = 1;
 206          }
 207          n += differs;
 208       }
 209
 210       FREE(rgba2);
 211
 212       return n;
 213    }
 214
 215 };
 216
 217 struct st_buffer {
 218 };
 219
 220 %extend st_buffer {
 221
 222    ~st_buffer() {
 223       st_buffer_destroy($self);
 224    }
 225
 226    unsigned __len__(void)
 227    {
 228       assert($self->buffer->refcount);
 229       return $self->buffer->size;
 230    }
 231
 232    %cstring_output_allocate_size(char **STRING, int *LENGTH, free(*$1));
 233    void read(char **STRING, int *LENGTH)
 234    {
 235       struct pipe_screen *screen = $self->st_dev->screen;
 236       const char *map;
 237
 238       assert($self->buffer->refcount);
 239
 240       *LENGTH = $self->buffer->size;
 241       *STRING = (char *) malloc($self->buffer->size);
 242       if(!*STRING)
 243          return;
 244
 245       map = pipe_buffer_map(screen, $self->buffer, PIPE_BUFFER_USAGE_CPU_READ);
 246       if(map) {
 247          memcpy(*STRING, map, $self->buffer->size);
 248          pipe_buffer_unmap(screen, $self->buffer);
 249       }
 250    }
 251
 252    %cstring_input_binary(const char *STRING, unsigned LENGTH);
 253    void write(const char *STRING, unsigned LENGTH, unsigned offset = 0)
 254    {
 255       struct pipe_screen *screen = $self->st_dev->screen;
 256       char *map;
 257
 258       assert($self->buffer->refcount);
 259
 260       if(offset > $self->buffer->size) {
 261          PyErr_SetString(PyExc_ValueError, "offset must be smaller than buffer size");
 262          return;
 263       }
 264
 265       if(offset + LENGTH > $self->buffer->size) {
 266          PyErr_SetString(PyExc_ValueError, "data length must fit inside the buffer");
 267          return;
 268       }
 269
 270       map = pipe_buffer_map(screen, $self->buffer, PIPE_BUFFER_USAGE_CPU_WRITE);
 271       if(map) {
 272          memcpy(map + offset, STRING, LENGTH);
 273          pipe_buffer_unmap(screen, $self->buffer);
 274       }
 275    }
 276 };