src/gallium/drivers/i915/i915_batchbuffer.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
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  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  26  **************************************************************************/
  27
  28 #ifndef I915_BATCHBUFFER_H
  29 #define I915_BATCHBUFFER_H
  30
  31 #include "i915_winsys.h"
  32
  33 struct i915_context;
  34
  35 static INLINE boolean
  36 i915_winsys_batchbuffer_check(struct i915_winsys_batchbuffer *batch,
  37                               size_t dwords,
  38                               size_t relocs)
  39 {
  40    return dwords * 4 <= batch->size - (batch->ptr - batch->map) &&
  41           relocs <= (batch->max_relocs - batch->relocs);
  42 }
  43
  44 static INLINE size_t
  45 i915_winsys_batchbuffer_space(struct i915_winsys_batchbuffer *batch)
  46 {
  47    return batch->size - (batch->ptr - batch->map);
  48 }
  49
  50 static INLINE void
  51 i915_winsys_batchbuffer_dword(struct i915_winsys_batchbuffer *batch,
  52                               unsigned dword)
  53 {
  54    if (i915_winsys_batchbuffer_space(batch) < 4)
  55       return;
  56
  57    *(unsigned *)batch->ptr = dword;
  58    batch->ptr += 4;
  59 }
  60
  61 static INLINE void
  62 i915_winsys_batchbuffer_write(struct i915_winsys_batchbuffer *batch,
  63                        void *data,
  64                        size_t size)
  65 {
  66    if (i915_winsys_batchbuffer_space(batch) < size)
  67       return;
  68
  69    memcpy(data, batch->ptr, size);
  70    batch->ptr += size;
  71 }
  72
  73 static INLINE int
  74 i915_winsys_batchbuffer_reloc(struct i915_winsys_batchbuffer *batch,
  75                               struct i915_winsys_buffer *buffer,
  76                               enum i915_winsys_buffer_usage usage,
  77                               size_t offset)
  78 {
  79    return batch->iws->batchbuffer_reloc(batch, buffer, usage, offset);
  80 }
  81
  82 #endif