summaryrefslogtreecommitdiffstats
path: root/src/mesa/main/bufferobj.c
diff options
context:
space:
mode:
authorBrian Paul <[email protected]>2009-06-08 17:02:36 -0600
committerBrian Paul <[email protected]>2009-06-08 17:02:36 -0600
commite75b283b45add351dbe5a09289fe85546df8a79a (patch)
tree99bc5ae9c61d125dee62261c333075b6c4e6c8f5 /src/mesa/main/bufferobj.c
parent75cb3c3b7a9db75ec4df63158bf268bb49b62bf4 (diff)
mesa: implement GL_ARB_map_buffer_range
Only enabled for software drivers at this point. Note that the gl_buffer_object::Access enum field has been replaced by a gl_buffer_object::AccessFlags bitfield. The new field is a mask of the GL_MAP_x_BIT flags which is a superset of the old GL_READ_ONLY, GL_WRITE_ONLY and GL_READ_WRITE modes. When we query GL_BUFFER_ACCESS_ARB we translate the bitfield into the conventional enum values.
Diffstat (limited to 'src/mesa/main/bufferobj.c')
-rw-r--r--src/mesa/main/bufferobj.c235
1 files changed, 225 insertions, 10 deletions
diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index 3e011ef5b23..6b228810720 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -40,9 +40,9 @@
#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
@@ -96,6 +96,24 @@ 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.
*
@@ -271,7 +289,7 @@ _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;
}
@@ -410,6 +428,43 @@ _mesa_buffer_map( GLcontext *ctx, GLenum target, GLenum access,
/**
+ * Default fallback for \c dd_function_table::MapBufferRange().
+ * Called via glMapBufferRange().
+ */
+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().
+ */
+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.
@@ -845,7 +900,7 @@ _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;
}
@@ -1004,7 +1059,7 @@ _mesa_BufferDataARB(GLenum target, GLsizeiptrARB size,
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;
}
@@ -1071,13 +1126,18 @@ _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)");
@@ -1104,7 +1164,10 @@ _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;
@@ -1146,7 +1209,7 @@ _mesa_UnmapBufferARB(GLenum target)
}
#ifdef VBO_DEBUG
- if (bufObj->Access == GL_WRITE_ONLY_ARB) {
+ if (bufObj->AccessFlags & GL_MAP_WRITE_BIT) {
GLuint i, unchanged = 0;
GLubyte *b = (GLubyte *) bufObj->Pointer;
GLint pos = -1;
@@ -1166,8 +1229,10 @@ _mesa_UnmapBufferARB(GLenum target)
#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;
}
@@ -1198,7 +1263,7 @@ _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);
@@ -1315,3 +1380,153 @@ _mesa_CopyBufferSubData(GLenum readTarget, GLenum writeTarget,
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);
+}