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 st_surface;
  38 %nodefaultctor pipe_buffer;
  39
  40 %nodefaultdtor pipe_texture;
  41 %nodefaultdtor st_surface;
  42 %nodefaultdtor pipe_buffer;
  43
  44 %ignore pipe_texture::screen;
  45
  46 %immutable st_surface::texture;
  47 %immutable st_surface::face;
  48 %immutable st_surface::level;
  49 %immutable st_surface::zslice;
  50
  51 %newobject pipe_texture::get_surface;
  52
  53
  54 %extend pipe_texture {
  55
  56    ~pipe_texture() {
  57       struct pipe_texture *ptr = $self;
  58       pipe_texture_reference(&ptr, NULL);
  59    }
  60
  61    unsigned get_width(unsigned level=0) {
  62       return u_minify($self->width0, level);
  63    }
  64
  65    unsigned get_height(unsigned level=0) {
  66       return u_minify($self->height0, level);
  67    }
  68
  69    unsigned get_depth(unsigned level=0) {
  70       return u_minify($self->depth0, level);
  71    }
  72
  73    /** Get a surface which is a "view" into a texture */
  74    struct st_surface *
  75    get_surface(unsigned face=0, unsigned level=0, unsigned zslice=0)
  76    {
  77       struct st_surface *surface;
  78
  79       if(face >= ($self->target == PIPE_TEXTURE_CUBE ? 6U : 1U))
  80          SWIG_exception(SWIG_ValueError, "face out of bounds");
  81       if(level > $self->last_level)
  82          SWIG_exception(SWIG_ValueError, "level out of bounds");
  83       if(zslice >= u_minify($self->depth0, level))
  84          SWIG_exception(SWIG_ValueError, "zslice out of bounds");
  85
  86       surface = CALLOC_STRUCT(st_surface);
  87       if(!surface)
  88          return NULL;
  89
  90       pipe_texture_reference(&surface->texture, $self);
  91       surface->face = face;
  92       surface->level = level;
  93       surface->zslice = zslice;
  94
  95       return surface;
  96
  97    fail:
  98       return NULL;
  99    }
 100
 101 };
 102
 103 struct st_surface
 104 {
 105    %immutable;
 106
 107    struct pipe_texture *texture;
 108    unsigned face;
 109    unsigned level;
 110    unsigned zslice;
 111
 112 };
 113
 114 %extend st_surface {
 115
 116    %immutable;
 117
 118    unsigned format;
 119    unsigned width;
 120    unsigned height;
 121
 122    ~st_surface() {
 123       pipe_texture_reference(&$self->texture, NULL);
 124       FREE($self);
 125    }
 126
 127
 128 };
 129
 130 %{
 131    static enum pipe_format
 132    st_surface_format_get(struct st_surface *surface)
 133    {
 134       return surface->texture->format;
 135    }
 136
 137    static unsigned
 138    st_surface_width_get(struct st_surface *surface)
 139    {
 140       return u_minify(surface->texture->width0, surface->level);
 141    }
 142
 143    static unsigned
 144    st_surface_height_get(struct st_surface *surface)
 145    {
 146       return u_minify(surface->texture->height0, surface->level);
 147    }
 148 %}
 149
 150 /* Avoid naming conflict with p_inlines.h's pipe_buffer_read/write */
 151 %rename(read) read_;
 152 %rename(write) write_;
 153
 154 %extend pipe_buffer {
 155
 156    ~pipe_buffer() {
 157       struct pipe_buffer *ptr = $self;
 158       pipe_buffer_reference(&ptr, NULL);
 159    }
 160
 161    unsigned __len__(void)
 162    {
 163       assert(p_atomic_read(&$self->reference.count) > 0);
 164       return $self->size;
 165    }
 166
 167    %cstring_output_allocate_size(char **STRING, int *LENGTH, free(*$1));
 168    void read_(char **STRING, int *LENGTH)
 169    {
 170       struct pipe_screen *screen = $self->screen;
 171
 172       assert(p_atomic_read(&$self->reference.count) > 0);
 173
 174       *LENGTH = $self->size;
 175       *STRING = (char *) malloc($self->size);
 176       if(!*STRING)
 177          return;
 178
 179       pipe_buffer_read(screen, $self, 0, $self->size, *STRING);
 180    }
 181
 182    %cstring_input_binary(const char *STRING, unsigned LENGTH);
 183    void write_(const char *STRING, unsigned LENGTH, unsigned offset = 0)
 184    {
 185       struct pipe_screen *screen = $self->screen;
 186
 187       assert(p_atomic_read(&$self->reference.count) > 0);
 188
 189       if(offset > $self->size)
 190          SWIG_exception(SWIG_ValueError, "offset must be smaller than buffer size");
 191
 192       if(offset + LENGTH > $self->size)
 193          SWIG_exception(SWIG_ValueError, "data length must fit inside the buffer");
 194
 195       pipe_buffer_write(screen, $self, offset, LENGTH, STRING);
 196
 197 fail:
 198       return;
 199    }
 200 };