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, unsigned alignment,
   8                       enum i915_winsys_buffer_type type)
   9 {
  10    struct i915_sw_buffer *buf = CALLOC_STRUCT(i915_sw_buffer);
  11    char *name;
  12
  13    if (!buf)
  14       return NULL;
  15
  16    if (type == I915_NEW_TEXTURE) {
  17       name = "gallium3d_texture";
  18    } else if (type == I915_NEW_VERTEX) {
  19       name = "gallium3d_vertex";
  20    } else if (type == I915_NEW_SCANOUT) {
  21       name = "gallium3d_scanout";
  22    } else {
  23       assert(0);
  24       name = "gallium3d_unknown";
  25    }
  26
  27    buf->magic = 0xDEAD1337;
  28    buf->name = name;
  29    buf->type = type;
  30    buf->ptr = CALLOC(size, 1);
  31
  32    if (!buf->ptr)
  33       goto err;
  34
  35    return (struct i915_winsys_buffer *)buf;
  36
  37 err:
  38    assert(0);
  39    FREE(buf);
  40    return NULL;
  41 }
  42
  43 static int
  44 i915_sw_buffer_set_fence_reg(struct i915_winsys *iws,
  45                                struct i915_winsys_buffer *buffer,
  46                                unsigned stride,
  47                                enum i915_winsys_buffer_tile tile)
  48 {
  49    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
  50
  51    if (tile != I915_TILE_NONE) {
  52       assert(buf->map_count == 0);
  53    }
  54
  55    buf->tile = tile;
  56
  57    return 0;
  58 }
  59
  60 static void *
  61 i915_sw_buffer_map(struct i915_winsys *iws,
  62                    struct i915_winsys_buffer *buffer,
  63                    boolean write)
  64 {
  65    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
  66
  67    buf->map_count += 1;
  68    return buf->ptr;
  69 }
  70
  71 static void
  72 i915_sw_buffer_unmap(struct i915_winsys *iws,
  73                      struct i915_winsys_buffer *buffer)
  74 {
  75    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
  76
  77    buf->map_count -= 1;
  78 }
  79
  80 static int
  81 i915_sw_buffer_write(struct i915_winsys *iws,
  82                      struct i915_winsys_buffer *buffer,
  83                      size_t offset,
  84                      size_t size,
  85                      const void *data)
  86 {
  87    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
  88
  89    memcpy(buf->ptr + offset, data, size);
  90    return 0;
  91 }
  92
  93 static void
  94 i915_sw_buffer_destroy(struct i915_winsys *iws,
  95                        struct i915_winsys_buffer *buffer)
  96 {
  97    struct i915_sw_buffer *buf = i915_sw_buffer(buffer);
  98
  99 #ifdef DEBUG
 100    buf->magic = 0;
 101 #endif
 102
 103    FREE(buf->ptr);
 104    FREE(buf);
 105 }
 106
 107 void
 108 i915_sw_winsys_init_buffer_functions(struct i915_sw_winsys *isws)
 109 {
 110    isws->base.buffer_create = i915_sw_buffer_create;
 111    isws->base.buffer_set_fence_reg = i915_sw_buffer_set_fence_reg;
 112    isws->base.buffer_map = i915_sw_buffer_map;
 113    isws->base.buffer_unmap = i915_sw_buffer_unmap;
 114    isws->base.buffer_write = i915_sw_buffer_write;
 115    isws->base.buffer_destroy = i915_sw_buffer_destroy;
 116 }