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mesa: only map src/dest regions in _mesa_copy_buffer_subdata()

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We were wastefully mapping the whole source/dest buffers before.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
This commit is contained in:
Brian Paul 2012-01-04 14:53:55 -07:00
parent b330f1f13c
commit 6aed626c35
1 changed files with 7 additions and 6 deletions
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13
src/mesa/main/bufferobj.c
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@ -502,19 +502,20 @@ _mesa_copy_buffer_subdata(struct gl_context *ctx,
GLintptr readOffset, GLintptr writeOffset,
GLsizeiptr size)
{
GLubyte *srcPtr, *dstPtr;
void *srcPtr, *dstPtr;
/* buffer should not already be mapped */
assert(!_mesa_bufferobj_mapped(src));
assert(!_mesa_bufferobj_mapped(dst));
srcPtr = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, src->Size,
GL_MAP_READ_BIT, src);
dstPtr = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, dst->Size,
GL_MAP_WRITE_BIT, dst);
srcPtr = ctx->Driver.MapBufferRange(ctx, readOffset, size,
GL_MAP_READ_BIT, src);
dstPtr = ctx->Driver.MapBufferRange(ctx, writeOffset, size,
(GL_MAP_WRITE_BIT |
GL_MAP_INVALIDATE_RANGE_BIT), dst);
if (srcPtr && dstPtr)
memcpy(dstPtr + writeOffset, srcPtr + readOffset, size);
memcpy(dstPtr, srcPtr, size);
ctx->Driver.UnmapBuffer(ctx, src);
ctx->Driver.UnmapBuffer(ctx, dst);