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 void *
  59 i915_sw_buffer_map(struct i915_winsys *iws,
  60                    struct i915_winsys_buffer *buffer,
  61                    boolean write)
  62 {
  63    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
  64
  65    buf->map_count += 1;
  66    return buf->ptr;
  67 }
  68
  69 static void
  70 i915_sw_buffer_unmap(struct i915_winsys *iws,
  71                      struct i915_winsys_buffer *buffer)
  72 {
  73    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
  74
  75    buf->map_count -= 1;
  76 }
  77
  78 static int
  79 i915_sw_buffer_write(struct i915_winsys *iws,
  80                      struct i915_winsys_buffer *buffer,
  81                      size_t offset,
  82                      size_t size,
  83                      const void *data)
  84 {
  85    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
  86
  87    memcpy((char*)buf->ptr + offset, data, size);
  88    return 0;
  89 }
  90
  91 static void
  92 i915_sw_buffer_destroy(struct i915_winsys *iws,
  93                        struct i915_winsys_buffer *buffer)
  94 {
  95    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
  96
  97 #ifdef DEBUG
  98    buf->magic = 0;
  99 #endif
 100
 101    FREE(buf->ptr);
 102    FREE(buf);
 103 }
 104
 105 void
 106 i915_sw_winsys_init_buffer_functions(struct i915_sw_winsys *isws)
 107 {
 108    isws->base.buffer_create = i915_sw_buffer_create;
 109    isws->base.buffer_create_tiled = i915_sw_buffer_create_tiled;
 110    isws->base.buffer_map = i915_sw_buffer_map;
 111    isws->base.buffer_unmap = i915_sw_buffer_unmap;
 112    isws->base.buffer_write = i915_sw_buffer_write;
 113    isws->base.buffer_destroy = i915_sw_buffer_destroy;
 114 }