diff options
Diffstat (limited to 'src/mesa/main/bufferobj.c')
| -rw-r--r-- | src/mesa/main/bufferobj.c | 553 |
1 files changed, 504 insertions, 49 deletions
diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c index c8d160baa9a..d640f5358e5 100644 --- a/src/mesa/main/bufferobj.c +++ b/src/mesa/main/bufferobj.c @@ -1,9 +1,9 @@ /* * 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"), @@ -39,10 +39,15 @@ #include "bufferobj.h" +/* Debug flags */ +/*#define VBO_DEBUG*/ +/*#define BOUNDS_CHECK*/ + + #ifdef FEATURE_OES_mapbuffer -#define DEFAULT_ACCESS GL_WRITE_ONLY; +#define DEFAULT_ACCESS GL_MAP_WRITE_BIT #else -#define DEFAULT_ACCESS GL_READ_WRITE; +#define DEFAULT_ACCESS (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT) #endif @@ -73,6 +78,16 @@ 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; @@ -86,6 +101,24 @@ get_buffer(GLcontext *ctx, GLenum target) /** + * Convert a GLbitfield describing the mapped buffer access flags + * into one of GL_READ_WRITE, GL_READ_ONLY, or GL_WRITE_ONLY. + */ +static GLenum +simplified_access_mode(GLbitfield access) +{ + const GLbitfield rwFlags = GL_MAP_READ_BIT | GL_MAP_WRITE_BIT; + if ((access & rwFlags) == rwFlags) + return GL_READ_WRITE; + if ((access & GL_MAP_READ_BIT) == GL_MAP_READ_BIT) + return GL_READ_ONLY; + if ((access & GL_MAP_WRITE_BIT) == GL_MAP_WRITE_BIT) + return GL_WRITE_ONLY; + return GL_READ_WRITE; /* this should never happen, but no big deal */ +} + + +/** * Tests the subdata range parameters and sets the GL error code for * \c glBufferSubDataARB and \c glGetBufferSubDataARB. * @@ -147,7 +180,7 @@ buffer_object_subdata_range_good( GLcontext * ctx, GLenum target, * * Default callback for the \c dd_function_table::NewBufferObject() hook. */ -struct gl_buffer_object * +static struct gl_buffer_object * _mesa_new_buffer_object( GLcontext *ctx, GLuint name, GLenum target ) { struct gl_buffer_object *obj; @@ -165,7 +198,7 @@ _mesa_new_buffer_object( GLcontext *ctx, GLuint name, GLenum target ) * * Default callback for the \c dd_function_table::DeleteBuffer() hook. */ -void +static void _mesa_delete_buffer_object( GLcontext *ctx, struct gl_buffer_object *bufObj ) { (void) ctx; @@ -194,7 +227,7 @@ _mesa_reference_buffer_object(GLcontext *ctx, return; if (*ptr) { - /* Unreference the old texture */ + /* Unreference the old buffer */ GLboolean deleteFlag = GL_FALSE; struct gl_buffer_object *oldObj = *ptr; @@ -227,7 +260,7 @@ _mesa_reference_buffer_object(GLcontext *ctx, ASSERT(!*ptr); if (bufObj) { - /* reference new texture */ + /* reference new buffer */ /*_glthread_LOCK_MUTEX(tex->Mutex);*/ if (bufObj->RefCount == 0) { /* this buffer's being deleted (look just above) */ @@ -261,7 +294,7 @@ _mesa_initialize_buffer_object( struct gl_buffer_object *obj, obj->RefCount = 1; obj->Name = name; obj->Usage = GL_STATIC_DRAW_ARB; - obj->Access = DEFAULT_ACCESS; + obj->AccessFlags = DEFAULT_ACCESS; } @@ -283,7 +316,7 @@ _mesa_initialize_buffer_object( struct gl_buffer_object *obj, * * \sa glBufferDataARB, dd_function_table::BufferData. */ -void +static void _mesa_buffer_data( GLcontext *ctx, GLenum target, GLsizeiptrARB size, const GLvoid * data, GLenum usage, struct gl_buffer_object * bufObj ) @@ -322,7 +355,7 @@ _mesa_buffer_data( GLcontext *ctx, GLenum target, GLsizeiptrARB size, * * \sa glBufferSubDataARB, dd_function_table::BufferSubData. */ -void +static void _mesa_buffer_subdata( GLcontext *ctx, GLenum target, GLintptrARB offset, GLsizeiptrARB size, const GLvoid * data, struct gl_buffer_object * bufObj ) @@ -355,7 +388,7 @@ _mesa_buffer_subdata( GLcontext *ctx, GLenum target, GLintptrARB offset, * * \sa glBufferGetSubDataARB, dd_function_table::GetBufferSubData. */ -void +static void _mesa_buffer_get_subdata( GLcontext *ctx, GLenum target, GLintptrARB offset, GLsizeiptrARB size, GLvoid * data, struct gl_buffer_object * bufObj ) @@ -382,14 +415,13 @@ _mesa_buffer_get_subdata( GLcontext *ctx, GLenum target, GLintptrARB offset, * * \sa glMapBufferARB, dd_function_table::MapBuffer */ -void * +static void * _mesa_buffer_map( GLcontext *ctx, GLenum target, GLenum access, struct gl_buffer_object *bufObj ) { (void) ctx; (void) target; (void) access; - ASSERT(!bufObj->OnCard); /* Just return a direct pointer to the data */ if (bufObj->Pointer) { /* already mapped! */ @@ -401,19 +433,55 @@ _mesa_buffer_map( GLcontext *ctx, GLenum target, GLenum access, /** + * Default fallback for \c dd_function_table::MapBufferRange(). + * Called via glMapBufferRange(). + */ +static void * +_mesa_buffer_map_range( GLcontext *ctx, GLenum target, GLintptr offset, + GLsizeiptr length, GLbitfield access, + struct gl_buffer_object *bufObj ) +{ + (void) ctx; + (void) target; + (void) access; + (void) length; + assert(!bufObj->Pointer); + /* Just return a direct pointer to the data */ + return bufObj->Data + offset; +} + + +/** + * Default fallback for \c dd_function_table::FlushMappedBufferRange(). + * Called via glFlushMappedBufferRange(). + */ +static void +_mesa_buffer_flush_mapped_range( GLcontext *ctx, GLenum target, + GLintptr offset, GLsizeiptr length, + struct gl_buffer_object *obj ) +{ + (void) ctx; + (void) target; + (void) offset; + (void) length; + (void) obj; + /* no-op */ +} + + +/** * Default callback for \c dd_function_table::MapBuffer(). * * The input parameters will have been already tested for errors. * * \sa glUnmapBufferARB, dd_function_table::UnmapBuffer */ -GLboolean +static GLboolean _mesa_buffer_unmap( GLcontext *ctx, GLenum target, struct gl_buffer_object *bufObj ) { (void) ctx; (void) target; - ASSERT(!bufObj->OnCard); /* XXX we might assert here that bufObj->Pointer is non-null */ bufObj->Pointer = NULL; return GL_TRUE; @@ -421,21 +489,51 @@ _mesa_buffer_unmap( GLcontext *ctx, GLenum target, /** + * Default fallback for \c dd_function_table::CopyBufferSubData(). + * Called via glCopyBuffserSubData(). + */ +static 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 */ void _mesa_init_buffer_objects( GLcontext *ctx ) { - /* Allocate the default buffer object and set refcount so high that - * it never gets deleted. - * XXX with recent/improved refcounting this may not longer be needed. - */ - ctx->Array.NullBufferObj = _mesa_new_buffer_object(ctx, 0, 0); - if (ctx->Array.NullBufferObj) - ctx->Array.NullBufferObj->RefCount = 1000; - - ctx->Array.ArrayBufferObj = ctx->Array.NullBufferObj; - ctx->Array.ElementArrayBufferObj = ctx->Array.NullBufferObj; + _mesa_reference_buffer_object(ctx, &ctx->Array.ArrayBufferObj, + ctx->Shared->NullBufferObj); + _mesa_reference_buffer_object(ctx, &ctx->Array.ElementArrayBufferObj, + ctx->Shared->NullBufferObj); + + _mesa_reference_buffer_object(ctx, &ctx->CopyReadBuffer, + ctx->Shared->NullBufferObj); + _mesa_reference_buffer_object(ctx, &ctx->CopyWriteBuffer, + ctx->Shared->NullBufferObj); } @@ -462,8 +560,22 @@ 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; } @@ -479,7 +591,7 @@ bind_buffer_object(GLcontext *ctx, GLenum target, GLuint buffer) /* The spec says there's not a buffer object named 0, but we use * one internally because it simplifies things. */ - newBufObj = ctx->Array.NullBufferObj; + newBufObj = ctx->Shared->NullBufferObj; } else { /* non-default buffer object */ @@ -500,7 +612,7 @@ bind_buffer_object(GLcontext *ctx, GLenum target, GLuint buffer) _mesa_reference_buffer_object(ctx, bindTarget, newBufObj); /* Pass BindBuffer call to device driver */ - if (ctx->Driver.BindBuffer && newBufObj) + if (ctx->Driver.BindBuffer) ctx->Driver.BindBuffer( ctx, target, newBufObj ); } @@ -746,11 +858,37 @@ unbind(GLcontext *ctx, struct gl_buffer_object *obj) { if (*ptr == obj) { - _mesa_reference_buffer_object(ctx, ptr, ctx->Array.NullBufferObj); + _mesa_reference_buffer_object(ctx, ptr, ctx->Shared->NullBufferObj); } } +/** + * Plug default/fallback buffer object functions into the device + * driver hooks. + */ +void +_mesa_init_buffer_object_functions(struct dd_function_table *driver) +{ + /* GL_ARB_vertex/pixel_buffer_object */ + driver->NewBufferObject = _mesa_new_buffer_object; + driver->DeleteBuffer = _mesa_delete_buffer_object; + driver->BindBuffer = NULL; + driver->BufferData = _mesa_buffer_data; + driver->BufferSubData = _mesa_buffer_subdata; + driver->GetBufferSubData = _mesa_buffer_get_subdata; + driver->MapBuffer = _mesa_buffer_map; + driver->UnmapBuffer = _mesa_buffer_unmap; + + /* GL_ARB_map_buffer_range */ + driver->MapBufferRange = _mesa_buffer_map_range; + driver->FlushMappedBufferRange = _mesa_buffer_flush_mapped_range; + + /* GL_ARB_copy_buffer */ + driver->CopyBufferSubData = _mesa_copy_buffer_subdata; +} + + /**********************************************************************/ /* API Functions */ @@ -789,6 +927,7 @@ _mesa_DeleteBuffersARB(GLsizei n, const GLuint *ids) for (i = 0; i < n; i++) { struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, ids[i]); if (bufObj) { + struct gl_array_object *arrayObj = ctx->Array.ArrayObj; GLuint j; ASSERT(bufObj->Name == ids[i]); @@ -796,23 +935,24 @@ _mesa_DeleteBuffersARB(GLsizei n, const GLuint *ids) if (bufObj->Pointer) { /* if mapped, unmap it now */ ctx->Driver.UnmapBuffer(ctx, 0, bufObj); - bufObj->Access = DEFAULT_ACCESS; + bufObj->AccessFlags = DEFAULT_ACCESS; bufObj->Pointer = NULL; } /* unbind any vertex pointers bound to this buffer */ - unbind(ctx, &ctx->Array.ArrayObj->Vertex.BufferObj, bufObj); - unbind(ctx, &ctx->Array.ArrayObj->Normal.BufferObj, bufObj); - unbind(ctx, &ctx->Array.ArrayObj->Color.BufferObj, bufObj); - unbind(ctx, &ctx->Array.ArrayObj->SecondaryColor.BufferObj, bufObj); - unbind(ctx, &ctx->Array.ArrayObj->FogCoord.BufferObj, bufObj); - unbind(ctx, &ctx->Array.ArrayObj->Index.BufferObj, bufObj); - unbind(ctx, &ctx->Array.ArrayObj->EdgeFlag.BufferObj, bufObj); - for (j = 0; j < MAX_TEXTURE_COORD_UNITS; j++) { - unbind(ctx, &ctx->Array.ArrayObj->TexCoord[j].BufferObj, bufObj); + unbind(ctx, &arrayObj->Vertex.BufferObj, bufObj); + unbind(ctx, &arrayObj->Weight.BufferObj, bufObj); + unbind(ctx, &arrayObj->Normal.BufferObj, bufObj); + unbind(ctx, &arrayObj->Color.BufferObj, bufObj); + unbind(ctx, &arrayObj->SecondaryColor.BufferObj, bufObj); + unbind(ctx, &arrayObj->FogCoord.BufferObj, bufObj); + unbind(ctx, &arrayObj->Index.BufferObj, bufObj); + unbind(ctx, &arrayObj->EdgeFlag.BufferObj, bufObj); + for (j = 0; j < Elements(arrayObj->TexCoord); j++) { + unbind(ctx, &arrayObj->TexCoord[j].BufferObj, bufObj); } - for (j = 0; j < VERT_ATTRIB_MAX; j++) { - unbind(ctx, &ctx->Array.ArrayObj->VertexAttrib[j].BufferObj, bufObj); + for (j = 0; j < Elements(arrayObj->VertexAttrib); j++) { + unbind(ctx, &arrayObj->VertexAttrib[j].BufferObj, bufObj); } if (ctx->Array.ArrayBufferObj == bufObj) { @@ -947,19 +1087,31 @@ _mesa_BufferDataARB(GLenum target, GLsizeiptrARB size, return; } if (bufObj->Name == 0) { - _mesa_error(ctx, GL_INVALID_OPERATION, "glBufferDataARB" ); + _mesa_error(ctx, GL_INVALID_OPERATION, "glBufferDataARB(buffer 0)" ); return; } if (bufObj->Pointer) { /* Unmap the existing buffer. We'll replace it now. Not an error. */ ctx->Driver.UnmapBuffer(ctx, target, bufObj); - bufObj->Access = DEFAULT_ACCESS; + bufObj->AccessFlags = DEFAULT_ACCESS; bufObj->Pointer = NULL; } + FLUSH_VERTICES(ctx, _NEW_BUFFER_OBJECT); + ASSERT(ctx->Driver.BufferData); + bufObj->Written = GL_TRUE; + +#ifdef VBO_DEBUG + _mesa_printf("glBufferDataARB(%u, sz %ld, from %p, usage 0x%x)\n", + bufObj->Name, size, data, usage); +#endif + +#ifdef BOUNDS_CHECK + size += 100; +#endif /* Give the buffer object to the driver! <data> may be null! */ ctx->Driver.BufferData( ctx, target, size, data, usage, bufObj ); } @@ -980,6 +1132,8 @@ _mesa_BufferSubDataARB(GLenum target, GLintptrARB offset, return; } + bufObj->Written = GL_TRUE; + ASSERT(ctx->Driver.BufferSubData); ctx->Driver.BufferSubData( ctx, target, offset, size, data, bufObj ); } @@ -1010,13 +1164,18 @@ _mesa_MapBufferARB(GLenum target, GLenum access) { GET_CURRENT_CONTEXT(ctx); struct gl_buffer_object * bufObj; + GLbitfield accessFlags; ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL); switch (access) { case GL_READ_ONLY_ARB: + accessFlags = GL_MAP_READ_BIT; + break; case GL_WRITE_ONLY_ARB: + accessFlags = GL_MAP_WRITE_BIT; + break; case GL_READ_WRITE_ARB: - /* OK */ + accessFlags = GL_MAP_READ_BIT | GL_MAP_WRITE_BIT; break; default: _mesa_error(ctx, GL_INVALID_ENUM, "glMapBufferARB(access)"); @@ -1029,7 +1188,7 @@ _mesa_MapBufferARB(GLenum target, GLenum access) return NULL; } if (bufObj->Name == 0) { - _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB" ); + _mesa_error(ctx, GL_INVALID_OPERATION, "glMapBufferARB(buffer 0)" ); return NULL; } if (bufObj->Pointer) { @@ -1043,7 +1202,34 @@ _mesa_MapBufferARB(GLenum target, GLenum access) _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(access)"); } - bufObj->Access = access; + bufObj->AccessFlags = accessFlags; + bufObj->Offset = 0; + bufObj->Length = bufObj->Size; + + if (access == GL_WRITE_ONLY_ARB || access == GL_READ_WRITE_ARB) + bufObj->Written = GL_TRUE; + +#ifdef VBO_DEBUG + _mesa_printf("glMapBufferARB(%u, sz %ld, access 0x%x)\n", + bufObj->Name, bufObj->Size, access); + if (access == GL_WRITE_ONLY_ARB) { + GLuint i; + GLubyte *b = (GLubyte *) bufObj->Pointer; + for (i = 0; i < bufObj->Size; i++) + b[i] = i & 0xff; + } +#endif + +#ifdef BOUNDS_CHECK + { + GLubyte *buf = (GLubyte *) bufObj->Pointer; + GLuint i; + /* buffer is 100 bytes larger than requested, fill with magic value */ + for (i = 0; i < 100; i++) { + buf[bufObj->Size - i - 1] = 123; + } + } +#endif return bufObj->Pointer; } @@ -1071,9 +1257,47 @@ _mesa_UnmapBufferARB(GLenum target) return GL_FALSE; } +#ifdef BOUNDS_CHECK + if (bufObj->Access != GL_READ_ONLY_ARB) { + GLubyte *buf = (GLubyte *) bufObj->Pointer; + GLuint i; + /* check that last 100 bytes are still = magic value */ + for (i = 0; i < 100; i++) { + GLuint pos = bufObj->Size - i - 1; + if (buf[pos] != 123) { + _mesa_warning(ctx, "Out of bounds buffer object write detected" + " at position %d (value = %u)\n", + pos, buf[pos]); + } + } + } +#endif + +#ifdef VBO_DEBUG + if (bufObj->AccessFlags & GL_MAP_WRITE_BIT) { + GLuint i, unchanged = 0; + GLubyte *b = (GLubyte *) bufObj->Pointer; + GLint pos = -1; + /* check which bytes changed */ + for (i = 0; i < bufObj->Size - 1; i++) { + if (b[i] == (i & 0xff) && b[i+1] == ((i+1) & 0xff)) { + unchanged++; + if (pos == -1) + pos = i; + } + } + if (unchanged) { + _mesa_printf("glUnmapBufferARB(%u): %u of %ld unchanged, starting at %d\n", + bufObj->Name, unchanged, bufObj->Size, pos); + } + } +#endif + status = ctx->Driver.UnmapBuffer( ctx, target, bufObj ); - bufObj->Access = DEFAULT_ACCESS; + bufObj->AccessFlags = DEFAULT_ACCESS; bufObj->Pointer = NULL; + bufObj->Offset = 0; + bufObj->Length = 0; return status; } @@ -1104,7 +1328,7 @@ _mesa_GetBufferParameterivARB(GLenum target, GLenum pname, GLint *params) *params = bufObj->Usage; break; case GL_BUFFER_ACCESS_ARB: - *params = bufObj->Access; + *params = simplified_access_mode(bufObj->AccessFlags); break; case GL_BUFFER_MAPPED_ARB: *params = (bufObj->Pointer != NULL); @@ -1140,3 +1364,234 @@ _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 > dst->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); +} + + +/** + * See GL_ARB_map_buffer_range spec + */ +void * GLAPIENTRY +_mesa_MapBufferRange(GLenum target, GLintptr offset, GLsizeiptr length, + GLbitfield access) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_buffer_object *bufObj; + ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL); + + if (!ctx->Extensions.ARB_map_buffer_range) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glMapBufferRange(extension not supported)"); + return NULL; + } + + if (offset < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, + "glMapBufferRange(offset = %ld)", offset); + return NULL; + } + + if (length < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, + "glMapBufferRange(length = %ld)", length); + return NULL; + } + + if ((access & (GL_MAP_READ_BIT | GL_MAP_WRITE_BIT)) == 0) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glMapBufferRange(access indicates neither read or write)"); + return NULL; + } + + if (access & GL_MAP_READ_BIT) { + if ((access & GL_MAP_INVALIDATE_RANGE_BIT) || + (access & GL_MAP_INVALIDATE_BUFFER_BIT) || + (access & GL_MAP_UNSYNCHRONIZED_BIT)) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glMapBufferRange(invalid access flags)"); + return NULL; + } + } + + if ((access & GL_MAP_FLUSH_EXPLICIT_BIT) && + ((access & GL_MAP_WRITE_BIT) == 0)) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glMapBufferRange(invalid access flags)"); + return NULL; + } + + bufObj = get_buffer(ctx, target); + if (!bufObj || bufObj->Name == 0) { + _mesa_error(ctx, GL_INVALID_ENUM, + "glMapBufferRange(target = 0x%x)", target); + return NULL; + } + + if (offset + length > bufObj->Size) { + _mesa_error(ctx, GL_INVALID_VALUE, + "glMapBufferRange(offset + length > size)"); + return NULL; + } + + if (bufObj->Pointer) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glMapBufferRange(buffer already mapped)"); + return NULL; + } + + ASSERT(ctx->Driver.MapBufferRange); + bufObj->Pointer = ctx->Driver.MapBufferRange(ctx, target, offset, length, + access, bufObj); + + bufObj->Offset = offset; + bufObj->Length = length; + bufObj->AccessFlags = access; + + return bufObj->Pointer; +} + + +/** + * See GL_ARB_map_buffer_range spec + */ +void GLAPIENTRY +_mesa_FlushMappedBufferRange(GLenum target, GLintptr offset, GLsizeiptr length) +{ + GET_CURRENT_CONTEXT(ctx); + struct gl_buffer_object *bufObj; + ASSERT_OUTSIDE_BEGIN_END(ctx); + + if (!ctx->Extensions.ARB_map_buffer_range) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glMapBufferRange(extension not supported)"); + return; + } + + if (offset < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, + "glMapBufferRange(offset = %ld)", offset); + return; + } + + if (length < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, + "glMapBufferRange(length = %ld)", length); + return; + } + + bufObj = get_buffer(ctx, target); + if (!bufObj) { + _mesa_error(ctx, GL_INVALID_ENUM, + "glMapBufferRange(target = 0x%x)", target); + return; + } + + if (bufObj->Name == 0) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glMapBufferRange(current buffer is 0)"); + return; + } + + if (!bufObj->Pointer) { + /* buffer is not mapped */ + _mesa_error(ctx, GL_INVALID_OPERATION, + "glMapBufferRange(buffer is not mapped)"); + return; + } + + if ((bufObj->AccessFlags & GL_MAP_FLUSH_EXPLICIT_BIT) == 0) { + _mesa_error(ctx, GL_INVALID_OPERATION, + "glMapBufferRange(GL_MAP_FLUSH_EXPLICIT_BIT not set)"); + return; + } + + if (offset + length > bufObj->Length) { + _mesa_error(ctx, GL_INVALID_VALUE, + "glMapBufferRange(offset %ld + length %ld > mapped length %ld)", + offset, length, bufObj->Length); + return; + } + + ASSERT(bufObj->AccessFlags & GL_MAP_WRITE_BIT); + + if (ctx->Driver.FlushMappedBufferRange) + ctx->Driver.FlushMappedBufferRange(ctx, target, offset, length, bufObj); +} |