Commit dc0b71f0 authored by Brian Paul's avatar Brian Paul

mesa: _mesa_CopyBufferSubData() function, and driver fall-back

parent 96a30b06
/*
* Mesa 3-D graphics library
* Version: 7.5
* Version: 7.6
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
* Copyright (C) 1999-2009 VMware, Inc. All Rights Reserved.
* Copyright (C) 2009 VMware, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
......@@ -73,6 +73,16 @@ get_buffer(GLcontext *ctx, GLenum target)
case GL_PIXEL_UNPACK_BUFFER_EXT:
bufObj = ctx->Unpack.BufferObj;
break;
case GL_COPY_READ_BUFFER:
if (ctx->Extensions.ARB_copy_buffer) {
bufObj = ctx->CopyReadBuffer;
}
break;
case GL_COPY_WRITE_BUFFER:
if (ctx->Extensions.ARB_copy_buffer) {
bufObj = ctx->CopyWriteBuffer;
}
break;
default:
/* error must be recorded by caller */
return NULL;
......@@ -418,6 +428,37 @@ _mesa_buffer_unmap( GLcontext *ctx, GLenum target,
}
/**
* Default fallback for \c dd_function_table::CopyBufferSubData().
* Called via glCopyBuffserSubData().
*/
void
_mesa_copy_buffer_subdata(GLcontext *ctx,
struct gl_buffer_object *src,
struct gl_buffer_object *dst,
GLintptr readOffset, GLintptr writeOffset,
GLsizeiptr size)
{
GLubyte *srcPtr, *dstPtr;
/* buffer should not already be mapped */
assert(!src->Pointer);
assert(!dst->Pointer);
srcPtr = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_COPY_READ_BUFFER,
GL_READ_ONLY, src);
dstPtr = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_COPY_WRITE_BUFFER,
GL_WRITE_ONLY, dst);
if (srcPtr && dstPtr)
_mesa_memcpy(dstPtr + writeOffset, srcPtr + readOffset, size);
ctx->Driver.UnmapBuffer(ctx, GL_COPY_READ_BUFFER, src);
ctx->Driver.UnmapBuffer(ctx, GL_COPY_WRITE_BUFFER, dst);
}
/**
* Initialize the state associated with buffer objects
*/
......@@ -426,6 +467,9 @@ _mesa_init_buffer_objects( GLcontext *ctx )
{
ctx->Array.ArrayBufferObj = ctx->Shared->NullBufferObj;
ctx->Array.ElementArrayBufferObj = ctx->Shared->NullBufferObj;
ctx->CopyReadBuffer = ctx->Shared->NullBufferObj;
ctx->CopyWriteBuffer = ctx->Shared->NullBufferObj;
}
......@@ -452,8 +496,22 @@ bind_buffer_object(GLcontext *ctx, GLenum target, GLuint buffer)
case GL_PIXEL_UNPACK_BUFFER_EXT:
bindTarget = &ctx->Unpack.BufferObj;
break;
case GL_COPY_READ_BUFFER:
if (ctx->Extensions.ARB_copy_buffer) {
bindTarget = &ctx->CopyReadBuffer;
}
break;
case GL_COPY_WRITE_BUFFER:
if (ctx->Extensions.ARB_copy_buffer) {
bindTarget = &ctx->CopyWriteBuffer;
}
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferARB(target)");
; /* no-op / we'll hit the follow error test next */
}
if (!bindTarget) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferARB(target 0x%x)");
return;
}
......@@ -1140,3 +1198,84 @@ _mesa_GetBufferPointervARB(GLenum target, GLenum pname, GLvoid **params)
*params = bufObj->Pointer;
}
void GLAPIENTRY
_mesa_CopyBufferSubData(GLenum readTarget, GLenum writeTarget,
GLintptr readOffset, GLintptr writeOffset,
GLsizeiptr size)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_buffer_object *src, *dst;
ASSERT_OUTSIDE_BEGIN_END(ctx);
src = get_buffer(ctx, readTarget);
if (!src || src->Name == 0) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glCopyBuffserSubData(readTarget = 0x%x)", readTarget);
return;
}
dst = get_buffer(ctx, writeTarget);
if (!dst || dst->Name == 0) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glCopyBuffserSubData(writeTarget = 0x%x)", writeTarget);
return;
}
if (src->Pointer) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyBuffserSubData(readBuffer is mapped)");
return;
}
if (dst->Pointer) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glCopyBuffserSubData(writeBuffer is mapped)");
return;
}
if (readOffset < 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyBuffserSubData(readOffset = %d)", readOffset);
return;
}
if (writeOffset < 0) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyBuffserSubData(writeOffset = %d)", writeOffset);
return;
}
if (readOffset + size > src->Size) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyBuffserSubData(readOffset + size = %d)",
readOffset, size);
return;
}
if (writeOffset + size > src->Size) {
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyBuffserSubData(writeOffset + size = %d)",
writeOffset, size);
return;
}
if (src == dst) {
if (readOffset + size <= writeOffset) {
/* OK */
}
else if (writeOffset + size <= readOffset) {
/* OK */
}
else {
/* overlapping src/dst is illegal */
_mesa_error(ctx, GL_INVALID_VALUE,
"glCopyBuffserSubData(overlapping src/dst)");
return;
}
}
ctx->Driver.CopyBufferSubData(ctx, src, dst, readOffset, writeOffset, size);
}
/*
* Mesa 3-D graphics library
* Version: 7.2
* Version: 7.6
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
* Copyright (C) 2009 VMware, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
......@@ -82,6 +83,13 @@ extern GLboolean
_mesa_buffer_unmap( GLcontext *ctx, GLenum target,
struct gl_buffer_object * bufObj );
extern void
_mesa_copy_buffer_subdata(GLcontext *ctx,
struct gl_buffer_object *src,
struct gl_buffer_object *dst,
GLintptr readOffset, GLintptr writeOffset,
GLsizeiptr size);
extern GLboolean
_mesa_validate_pbo_access(GLuint dimensions,
const struct gl_pixelstore_attrib *pack,
......@@ -154,4 +162,9 @@ _mesa_GetBufferParameterivARB(GLenum target, GLenum pname, GLint *params);
extern void GLAPIENTRY
_mesa_GetBufferPointervARB(GLenum target, GLenum pname, GLvoid **params);
extern void GLAPIENTRY
_mesa_CopyBufferSubData(GLenum readTarget, GLenum writeTarget,
GLintptr readOffset, GLintptr writeOffset,
GLsizeiptr size);
#endif
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