src/gallium/winsys/i915/sw/i915_sw_buffer.c

   1
   2 #include "i915_sw_winsys.h"
   3 #include "util/u_memory.h"
   4
   5 static struct i915_winsys_buffer *
   6 i915_sw_buffer_create(struct i915_winsys *iws,
   7                       unsigned size,
   8                       enum i915_winsys_buffer_type type)
   9 {
  10    struct i915_sw_buffer *buf = CALLOC_STRUCT(i915_sw_buffer);
  11
  12    if (!buf)
  13       return NULL;
  14
  15    buf->magic = 0xDEAD1337;
  16    buf->type = type;
  17    buf->ptr = CALLOC(size, 1);
  18
  19    if (!buf->ptr)
  20       goto err;
  21
  22    return (struct i915_winsys_buffer *)buf;
  23
  24 err:
  25    assert(0);
  26    FREE(buf);
  27    return NULL;
  28 }
  29
  30 static struct i915_winsys_buffer *
  31 i915_sw_buffer_create_tiled(struct i915_winsys *iws,
  32                       unsigned *stride, unsigned height,
  33                       enum i915_winsys_buffer_tile *tiling,
  34                       enum i915_winsys_buffer_type type)
  35 {
  36    struct i915_sw_buffer *buf = CALLOC_STRUCT(i915_sw_buffer);
  37
  38    if (!buf)
  39       return NULL;
  40
  41    buf->magic = 0xDEAD1337;
  42    buf->type = type;
  43    buf->ptr = CALLOC(*stride * height, 1);
  44    buf->tiling = *tiling;
  45    buf->stride = *stride;
  46
  47    if (!buf->ptr)
  48       goto err;
  49
  50    return (struct i915_winsys_buffer *)buf;
  51
  52 err:
  53    assert(0);
  54    FREE(buf);
  55    return NULL;
  56 }
  57
  58 static int
  59 i915_sw_buffer_set_fence_reg(struct i915_winsys *iws,
  60                                struct i915_winsys_buffer *buffer,
  61                                unsigned stride,
  62                                enum i915_winsys_buffer_tile tile)
  63 {
  64    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
  65
  66    if (tile != I915_TILE_NONE) {
  67       assert(buf->map_count == 0);
  68    }
  69
  70    buf->tiling = tile;
  71
  72    return 0;
  73 }
  74
  75 static void *
  76 i915_sw_buffer_map(struct i915_winsys *iws,
  77                    struct i915_winsys_buffer *buffer,
  78                    boolean write)
  79 {
  80    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
  81
  82    buf->map_count += 1;
  83    return buf->ptr;
  84 }
  85
  86 static void
  87 i915_sw_buffer_unmap(struct i915_winsys *iws,
  88                      struct i915_winsys_buffer *buffer)
  89 {
  90    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
  91
  92    buf->map_count -= 1;
  93 }
  94
  95 static int
  96 i915_sw_buffer_write(struct i915_winsys *iws,
  97                      struct i915_winsys_buffer *buffer,
  98                      size_t offset,
  99                      size_t size,
 100                      const void *data)
 101 {
 102    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
 103
 104    memcpy(buf->ptr + offset, data, size);
 105    return 0;
 106 }
 107
 108 static void
 109 i915_sw_buffer_destroy(struct i915_winsys *iws,
 110                        struct i915_winsys_buffer *buffer)
 111 {
 112    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
 113
 114 #ifdef DEBUG
 115    buf->magic = 0;
 116 #endif
 117
 118    FREE(buf->ptr);
 119    FREE(buf);
 120 }
 121
 122 void
 123 i915_sw_winsys_init_buffer_functions(struct i915_sw_winsys *isws)
 124 {
 125    isws->base.buffer_create = i915_sw_buffer_create;
 126    isws->base.buffer_create_tiled = i915_sw_buffer_create_tiled;
 127    isws->base.buffer_set_fence_reg = i915_sw_buffer_set_fence_reg;
 128    isws->base.buffer_map = i915_sw_buffer_map;
 129    isws->base.buffer_unmap = i915_sw_buffer_unmap;
 130    isws->base.buffer_write = i915_sw_buffer_write;
 131    isws->base.buffer_destroy = i915_sw_buffer_destroy;
 132 }