+ if (readOffset < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glCopyBufferSubData(readOffset = %d)", (int) readOffset);
+ return;
+ }
+
+ if (writeOffset < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glCopyBufferSubData(writeOffset = %d)", (int) writeOffset);
+ return;
+ }
+
+ if (size < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glCopyBufferSubData(writeOffset = %d)", (int) size);
+ return;
+ }
+
+ if (readOffset + size > src->Size) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glCopyBufferSubData(readOffset + size = %d)",
+ (int) (readOffset + size));
+ return;
+ }
+
+ if (writeOffset + size > dst->Size) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glCopyBufferSubData(writeOffset + size = %d)",
+ (int) (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,
+ "glCopyBufferSubData(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;
+ void *map;
+
+ 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)", (long)offset);
+ return NULL;
+ }
+
+ if (length < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glMapBufferRange(length = %ld)", (long)length);
+ return NULL;
+ }
+
+ /* Page 38 of the PDF of the OpenGL ES 3.0 spec says:
+ *
+ * "An INVALID_OPERATION error is generated for any of the following
+ * conditions:
+ *
+ * * <length> is zero."
+ */
+ if (_mesa_is_gles(ctx) && length == 0) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glMapBufferRange(length = 0)");
+ return NULL;
+ }
+
+ if (access & ~(GL_MAP_READ_BIT |
+ GL_MAP_WRITE_BIT |
+ GL_MAP_INVALIDATE_RANGE_BIT |
+ GL_MAP_INVALIDATE_BUFFER_BIT |
+ GL_MAP_FLUSH_EXPLICIT_BIT |
+ GL_MAP_UNSYNCHRONIZED_BIT)) {
+ /* generate an error if any undefind bit is set */
+ _mesa_error(ctx, GL_INVALID_VALUE, "glMapBufferRange(access)");
+ 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) &&
+ (access & (GL_MAP_INVALIDATE_RANGE_BIT |
+ GL_MAP_INVALIDATE_BUFFER_BIT |
+ 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, "glMapBufferRange", target);
+ if (!bufObj)
+ return NULL;
+
+ if (offset + length > bufObj->Size) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glMapBufferRange(offset + length > size)");
+ return NULL;
+ }
+
+ if (_mesa_bufferobj_mapped(bufObj)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glMapBufferRange(buffer already mapped)");
+ return NULL;
+ }
+
+ if (!bufObj->Size) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY,
+ "glMapBufferRange(buffer size = 0)");
+ return NULL;
+ }
+
+ /* Mapping zero bytes should return a non-null pointer. */
+ if (!length) {
+ static long dummy = 0;
+ bufObj->Pointer = &dummy;
+ bufObj->Length = length;
+ bufObj->Offset = offset;
+ bufObj->AccessFlags = access;
+ return bufObj->Pointer;
+ }
+
+ ASSERT(ctx->Driver.MapBufferRange);
+ map = ctx->Driver.MapBufferRange(ctx, offset, length, access, bufObj);
+ if (!map) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMapBufferARB(map failed)");
+ }
+ else {
+ /* The driver callback should have set all these fields.
+ * This is important because other modules (like VBO) might call
+ * the driver function directly.
+ */
+ ASSERT(bufObj->Pointer == map);
+ ASSERT(bufObj->Length == length);
+ ASSERT(bufObj->Offset == offset);
+ ASSERT(bufObj->AccessFlags == access);
+ }
+
+ return map;
+}
+
+
+/**
+ * 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,
+ "glFlushMappedBufferRange(extension not supported)");
+ return;
+ }
+
+ if (offset < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glFlushMappedBufferRange(offset = %ld)", (long)offset);
+ return;
+ }
+
+ if (length < 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glFlushMappedBufferRange(length = %ld)", (long)length);
+ return;
+ }
+
+ bufObj = get_buffer(ctx, "glFlushMappedBufferRange", target);
+ if (!bufObj)
+ return;
+
+ if (!_mesa_bufferobj_mapped(bufObj)) {
+ /* buffer is not mapped */
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glFlushMappedBufferRange(buffer is not mapped)");
+ return;
+ }
+
+ if ((bufObj->AccessFlags & GL_MAP_FLUSH_EXPLICIT_BIT) == 0) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glFlushMappedBufferRange(GL_MAP_FLUSH_EXPLICIT_BIT not set)");
+ return;
+ }
+
+ if (offset + length > bufObj->Length) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glFlushMappedBufferRange(offset %ld + length %ld > mapped length %ld)",
+ (long)offset, (long)length, (long)bufObj->Length);
+ return;
+ }
+
+ ASSERT(bufObj->AccessFlags & GL_MAP_WRITE_BIT);
+
+ if (ctx->Driver.FlushMappedBufferRange)
+ ctx->Driver.FlushMappedBufferRange(ctx, offset, length, bufObj);
+}
+
+
+static GLenum
+buffer_object_purgeable(struct gl_context *ctx, GLuint name, GLenum option)
+{
+ struct gl_buffer_object *bufObj;
+ GLenum retval;
+
+ bufObj = _mesa_lookup_bufferobj(ctx, name);
+ if (!bufObj) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glObjectPurgeable(name = 0x%x)", name);
+ return 0;
+ }
+ if (!_mesa_is_bufferobj(bufObj)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glObjectPurgeable(buffer 0)" );
+ return 0;
+ }
+
+ if (bufObj->Purgeable) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glObjectPurgeable(name = 0x%x) is already purgeable", name);
+ return GL_VOLATILE_APPLE;
+ }
+
+ bufObj->Purgeable = GL_TRUE;
+
+ retval = GL_VOLATILE_APPLE;
+ if (ctx->Driver.BufferObjectPurgeable)
+ retval = ctx->Driver.BufferObjectPurgeable(ctx, bufObj, option);
+
+ return retval;
+}
+
+
+static GLenum
+renderbuffer_purgeable(struct gl_context *ctx, GLuint name, GLenum option)
+{
+ struct gl_renderbuffer *bufObj;
+ GLenum retval;
+
+ bufObj = _mesa_lookup_renderbuffer(ctx, name);
+ if (!bufObj) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glObjectUnpurgeable(name = 0x%x)", name);
+ return 0;
+ }
+
+ if (bufObj->Purgeable) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glObjectPurgeable(name = 0x%x) is already purgeable", name);
+ return GL_VOLATILE_APPLE;
+ }
+
+ bufObj->Purgeable = GL_TRUE;
+
+ retval = GL_VOLATILE_APPLE;
+ if (ctx->Driver.RenderObjectPurgeable)
+ retval = ctx->Driver.RenderObjectPurgeable(ctx, bufObj, option);
+
+ return retval;
+}
+
+
+static GLenum
+texture_object_purgeable(struct gl_context *ctx, GLuint name, GLenum option)
+{
+ struct gl_texture_object *bufObj;
+ GLenum retval;
+
+ bufObj = _mesa_lookup_texture(ctx, name);
+ if (!bufObj) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glObjectPurgeable(name = 0x%x)", name);
+ return 0;
+ }
+
+ if (bufObj->Purgeable) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glObjectPurgeable(name = 0x%x) is already purgeable", name);
+ return GL_VOLATILE_APPLE;
+ }
+
+ bufObj->Purgeable = GL_TRUE;
+
+ retval = GL_VOLATILE_APPLE;
+ if (ctx->Driver.TextureObjectPurgeable)
+ retval = ctx->Driver.TextureObjectPurgeable(ctx, bufObj, option);
+
+ return retval;
+}
+
+
+GLenum GLAPIENTRY
+_mesa_ObjectPurgeableAPPLE(GLenum objectType, GLuint name, GLenum option)
+{
+ GLenum retval;
+
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
+
+ if (name == 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glObjectPurgeable(name = 0x%x)", name);
+ return 0;
+ }
+
+ switch (option) {
+ case GL_VOLATILE_APPLE:
+ case GL_RELEASED_APPLE:
+ /* legal */
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glObjectPurgeable(name = 0x%x) invalid option: %d",
+ name, option);
+ return 0;
+ }
+
+ switch (objectType) {
+ case GL_TEXTURE:
+ retval = texture_object_purgeable(ctx, name, option);
+ break;
+ case GL_RENDERBUFFER_EXT:
+ retval = renderbuffer_purgeable(ctx, name, option);
+ break;
+ case GL_BUFFER_OBJECT_APPLE:
+ retval = buffer_object_purgeable(ctx, name, option);
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glObjectPurgeable(name = 0x%x) invalid type: %d",
+ name, objectType);
+ return 0;
+ }
+
+ /* In strict conformance to the spec, we must only return VOLATILE when
+ * when passed the VOLATILE option. Madness.
+ *
+ * XXX First fix the spec, then fix me.
+ */
+ return option == GL_VOLATILE_APPLE ? GL_VOLATILE_APPLE : retval;
+}
+
+
+static GLenum
+buffer_object_unpurgeable(struct gl_context *ctx, GLuint name, GLenum option)
+{
+ struct gl_buffer_object *bufObj;
+ GLenum retval;
+
+ bufObj = _mesa_lookup_bufferobj(ctx, name);
+ if (!bufObj) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glObjectUnpurgeable(name = 0x%x)", name);
+ return 0;
+ }
+
+ if (! bufObj->Purgeable) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glObjectUnpurgeable(name = 0x%x) object is "
+ " already \"unpurged\"", name);
+ return 0;
+ }
+
+ bufObj->Purgeable = GL_FALSE;
+
+ retval = option;
+ if (ctx->Driver.BufferObjectUnpurgeable)
+ retval = ctx->Driver.BufferObjectUnpurgeable(ctx, bufObj, option);
+
+ return retval;
+}
+
+
+static GLenum
+renderbuffer_unpurgeable(struct gl_context *ctx, GLuint name, GLenum option)
+{
+ struct gl_renderbuffer *bufObj;
+ GLenum retval;
+
+ bufObj = _mesa_lookup_renderbuffer(ctx, name);
+ if (!bufObj) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glObjectUnpurgeable(name = 0x%x)", name);
+ return 0;
+ }
+
+ if (! bufObj->Purgeable) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glObjectUnpurgeable(name = 0x%x) object is "
+ " already \"unpurged\"", name);
+ return 0;
+ }
+
+ bufObj->Purgeable = GL_FALSE;
+
+ retval = option;
+ if (ctx->Driver.RenderObjectUnpurgeable)
+ retval = ctx->Driver.RenderObjectUnpurgeable(ctx, bufObj, option);
+
+ return retval;
+}
+
+
+static GLenum
+texture_object_unpurgeable(struct gl_context *ctx, GLuint name, GLenum option)
+{
+ struct gl_texture_object *bufObj;
+ GLenum retval;
+
+ bufObj = _mesa_lookup_texture(ctx, name);
+ if (!bufObj) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glObjectUnpurgeable(name = 0x%x)", name);
+ return 0;
+ }
+
+ if (! bufObj->Purgeable) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glObjectUnpurgeable(name = 0x%x) object is"
+ " already \"unpurged\"", name);
+ return 0;
+ }
+
+ bufObj->Purgeable = GL_FALSE;
+
+ retval = option;
+ if (ctx->Driver.TextureObjectUnpurgeable)
+ retval = ctx->Driver.TextureObjectUnpurgeable(ctx, bufObj, option);
+
+ return retval;
+}
+
+
+GLenum GLAPIENTRY
+_mesa_ObjectUnpurgeableAPPLE(GLenum objectType, GLuint name, GLenum option)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
+
+ if (name == 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glObjectUnpurgeable(name = 0x%x)", name);
+ return 0;
+ }
+
+ switch (option) {
+ case GL_RETAINED_APPLE:
+ case GL_UNDEFINED_APPLE:
+ /* legal */
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glObjectUnpurgeable(name = 0x%x) invalid option: %d",
+ name, option);
+ return 0;
+ }
+
+ switch (objectType) {
+ case GL_BUFFER_OBJECT_APPLE:
+ return buffer_object_unpurgeable(ctx, name, option);
+ case GL_TEXTURE:
+ return texture_object_unpurgeable(ctx, name, option);
+ case GL_RENDERBUFFER_EXT:
+ return renderbuffer_unpurgeable(ctx, name, option);
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glObjectUnpurgeable(name = 0x%x) invalid type: %d",
+ name, objectType);
+ return 0;
+ }
+}
+
+
+static void
+get_buffer_object_parameteriv(struct gl_context *ctx, GLuint name,
+ GLenum pname, GLint *params)
+{
+ struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, name);
+ if (!bufObj) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glGetObjectParameteriv(name = 0x%x) invalid object", name);
+ return;
+ }
+
+ switch (pname) {
+ case GL_PURGEABLE_APPLE:
+ *params = bufObj->Purgeable;
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
+ name, pname);
+ break;
+ }
+}
+
+
+static void
+get_renderbuffer_parameteriv(struct gl_context *ctx, GLuint name,
+ GLenum pname, GLint *params)
+{
+ struct gl_renderbuffer *rb = _mesa_lookup_renderbuffer(ctx, name);
+ if (!rb) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glObjectUnpurgeable(name = 0x%x)", name);
+ return;
+ }
+
+ switch (pname) {
+ case GL_PURGEABLE_APPLE:
+ *params = rb->Purgeable;
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
+ name, pname);
+ break;
+ }
+}
+
+
+static void
+get_texture_object_parameteriv(struct gl_context *ctx, GLuint name,
+ GLenum pname, GLint *params)
+{
+ struct gl_texture_object *texObj = _mesa_lookup_texture(ctx, name);
+ if (!texObj) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glObjectUnpurgeable(name = 0x%x)", name);
+ return;
+ }
+
+ switch (pname) {
+ case GL_PURGEABLE_APPLE:
+ *params = texObj->Purgeable;
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetObjectParameteriv(name = 0x%x) invalid enum: %d",
+ name, pname);
+ break;
+ }
+}
+
+
+void GLAPIENTRY
+_mesa_GetObjectParameterivAPPLE(GLenum objectType, GLuint name, GLenum pname,
+ GLint *params)
+{
+ GET_CURRENT_CONTEXT(ctx);
+
+ if (name == 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glGetObjectParameteriv(name = 0x%x)", name);
+ return;
+ }
+
+ switch (objectType) {
+ case GL_TEXTURE:
+ get_texture_object_parameteriv(ctx, name, pname, params);
+ break;
+ case GL_BUFFER_OBJECT_APPLE:
+ get_buffer_object_parameteriv(ctx, name, pname, params);
+ break;
+ case GL_RENDERBUFFER_EXT:
+ get_renderbuffer_parameteriv(ctx, name, pname, params);
+ break;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glGetObjectParameteriv(name = 0x%x) invalid type: %d",
+ name, objectType);
+ }
+}
+
+static void
+set_ubo_binding(struct gl_context *ctx,
+ int index,
+ struct gl_buffer_object *bufObj,
+ GLintptr offset,
+ GLsizeiptr size,
+ GLboolean autoSize)
+{
+ struct gl_uniform_buffer_binding *binding;
+
+ binding = &ctx->UniformBufferBindings[index];
+ if (binding->BufferObject == bufObj &&
+ binding->Offset == offset &&
+ binding->Size == size &&
+ binding->AutomaticSize == autoSize) {
+ return;
+ }
+
+ FLUSH_VERTICES(ctx, _NEW_BUFFER_OBJECT);
+
+ _mesa_reference_buffer_object(ctx, &binding->BufferObject, bufObj);
+ binding->Offset = offset;
+ binding->Size = size;
+ binding->AutomaticSize = autoSize;
+}
+
+/**
+ * Bind a region of a buffer object to a uniform block binding point.
+ * \param index the uniform buffer binding point index
+ * \param bufObj the buffer object
+ * \param offset offset to the start of buffer object region
+ * \param size size of the buffer object region
+ */
+static void
+bind_buffer_range_uniform_buffer(struct gl_context *ctx,
+ GLuint index,
+ struct gl_buffer_object *bufObj,
+ GLintptr offset,
+ GLsizeiptr size)
+{
+ if (index >= ctx->Const.MaxUniformBufferBindings) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(index=%d)", index);
+ return;
+ }
+
+ if (offset & (ctx->Const.UniformBufferOffsetAlignment - 1)) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glBindBufferRange(offset misalgned %d/%d)", (int) offset,
+ ctx->Const.UniformBufferOffsetAlignment);
+ return;
+ }
+
+ if (bufObj == ctx->Shared->NullBufferObj) {
+ offset = -1;
+ size = -1;
+ }
+
+ _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, bufObj);
+ set_ubo_binding(ctx, index, bufObj, offset, size, GL_FALSE);
+}
+
+
+/**
+ * Bind a buffer object to a uniform block binding point.
+ * As above, but offset = 0.
+ */
+static void
+bind_buffer_base_uniform_buffer(struct gl_context *ctx,
+ GLuint index,
+ struct gl_buffer_object *bufObj)
+{
+ if (index >= ctx->Const.MaxUniformBufferBindings) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index);
+ return;
+ }
+
+ _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer, bufObj);
+ if (bufObj == ctx->Shared->NullBufferObj)
+ set_ubo_binding(ctx, index, bufObj, -1, -1, GL_TRUE);
+ else
+ set_ubo_binding(ctx, index, bufObj, 0, 0, GL_TRUE);
+}
+
+void GLAPIENTRY
+_mesa_BindBufferRange(GLenum target, GLuint index,
+ GLuint buffer, GLintptr offset, GLsizeiptr size)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_buffer_object *bufObj;
+
+ if (buffer == 0) {
+ bufObj = ctx->Shared->NullBufferObj;
+ } else {
+ bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+ }
+ handle_bind_buffer_gen(ctx, target, buffer, &bufObj);
+
+ if (!bufObj) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glBindBufferRange(invalid buffer=%u)", buffer);
+ return;
+ }
+
+ if (size <= 0) {
+ _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(size=%d)",
+ (int) size);
+ return;
+ }
+
+ if (offset + size > bufObj->Size) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glBindBufferRange(offset + size %d > buffer size %d)",
+ (int) (offset + size), (int) (bufObj->Size));
+ return;
+ }
+
+ switch (target) {
+ case GL_TRANSFORM_FEEDBACK_BUFFER:
+ _mesa_bind_buffer_range_transform_feedback(ctx, index, bufObj,
+ offset, size);
+ return;
+ case GL_UNIFORM_BUFFER:
+ bind_buffer_range_uniform_buffer(ctx, index, bufObj, offset, size);
+ return;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferRange(target)");
+ return;
+ }
+}
+
+void GLAPIENTRY
+_mesa_BindBufferBase(GLenum target, GLuint index, GLuint buffer)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_buffer_object *bufObj;
+
+ if (buffer == 0) {
+ bufObj = ctx->Shared->NullBufferObj;
+ } else {
+ bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+ }
+ handle_bind_buffer_gen(ctx, target, buffer, &bufObj);
+
+ if (!bufObj) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glBindBufferBase(invalid buffer=%u)", buffer);
+ return;
+ }
+
+ /* Note that there's some oddness in the GL 3.1-GL 3.3 specifications with
+ * regards to BindBufferBase. It says (GL 3.1 core spec, page 63):
+ *
+ * "BindBufferBase is equivalent to calling BindBufferRange with offset
+ * zero and size equal to the size of buffer."
+ *
+ * but it says for glGetIntegeri_v (GL 3.1 core spec, page 230):
+ *
+ * "If the parameter (starting offset or size) was not specified when the
+ * buffer object was bound, zero is returned."
+ *
+ * What happens if the size of the buffer changes? Does the size of the
+ * buffer at the moment glBindBufferBase was called still play a role, like
+ * the first quote would imply, or is the size meaningless in the
+ * glBindBufferBase case like the second quote would suggest? The GL 4.1
+ * core spec page 45 says:
+ *
+ * "It is equivalent to calling BindBufferRange with offset zero, while
+ * size is determined by the size of the bound buffer at the time the
+ * binding is used."
+ *
+ * My interpretation is that the GL 4.1 spec was a clarification of the
+ * behavior, not a change. In particular, this choice will only make
+ * rendering work in cases where it would have had undefined results.
+ */
+
+ switch (target) {
+ case GL_TRANSFORM_FEEDBACK_BUFFER:
+ _mesa_bind_buffer_base_transform_feedback(ctx, index, bufObj);
+ return;
+ case GL_UNIFORM_BUFFER:
+ bind_buffer_base_uniform_buffer(ctx, index, bufObj);
+ return;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferBase(target)");
+ return;
+ }
+}
+
+static void GLAPIENTRY
+_mesa_InvalidateBufferSubData(GLuint buffer, GLintptr offset,
+ GLsizeiptr length)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_buffer_object *bufObj;
+ const GLintptr end = offset + length;
+
+ bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+ if (!bufObj) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glInvalidateBufferSubData(name = 0x%x) invalid object",
+ buffer);
+ return;
+ }
+
+ /* The GL_ARB_invalidate_subdata spec says:
+ *
+ * "An INVALID_VALUE error is generated if <offset> or <length> is
+ * negative, or if <offset> + <length> is greater than the value of
+ * BUFFER_SIZE."
+ */
+ if (end < 0 || end > bufObj->Size) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glInvalidateBufferSubData(invalid offset or length)");
+ return;
+ }
+
+ /* The GL_ARB_invalidate_subdata spec says:
+ *
+ * "An INVALID_OPERATION error is generated if the buffer is currently
+ * mapped by MapBuffer, or if the invalidate range intersects the range
+ * currently mapped by MapBufferRange."
+ */
+ if (_mesa_bufferobj_mapped(bufObj)) {
+ const GLintptr mapEnd = bufObj->Offset + bufObj->Length;
+
+ /* The regions do not overlap if and only if the end of the discard
+ * region is before the mapped region or the start of the discard region
+ * is after the mapped region.
+ *
+ * Note that 'end' and 'mapEnd' are the first byte *after* the discard
+ * region and the mapped region, repsectively. It is okay for that byte
+ * to be mapped (for 'end') or discarded (for 'mapEnd').
+ */
+ if (!(end <= bufObj->Offset || offset >= mapEnd)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glInvalidateBufferSubData(intersection with mapped "
+ "range)");
+ return;
+ }
+ }
+
+ /* We don't actually do anything for this yet. Just return after
+ * validating the parameters and generating the required errors.
+ */
+ return;
+}
+
+static void GLAPIENTRY
+_mesa_InvalidateBufferData(GLuint buffer)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ struct gl_buffer_object *bufObj;
+
+ bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+ if (!bufObj) {
+ _mesa_error(ctx, GL_INVALID_VALUE,
+ "glInvalidateBufferData(name = 0x%x) invalid object",
+ buffer);
+ return;
+ }
+
+ /* The GL_ARB_invalidate_subdata spec says:
+ *
+ * "An INVALID_OPERATION error is generated if the buffer is currently
+ * mapped by MapBuffer, or if the invalidate range intersects the range
+ * currently mapped by MapBufferRange."
+ */
+ if (_mesa_bufferobj_mapped(bufObj)) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glInvalidateBufferData(intersection with mapped "
+ "range)");
+ return;
+ }
+
+ /* We don't actually do anything for this yet. Just return after
+ * validating the parameters and generating the required errors.
+ */
+ return;
+}
+
+void
+_mesa_init_bufferobj_dispatch(struct gl_context *ctx, struct _glapi_table *disp)
+{
+ SET_BindBufferARB(disp, _mesa_BindBufferARB);
+ SET_BufferDataARB(disp, _mesa_BufferDataARB);
+ SET_BufferSubDataARB(disp, _mesa_BufferSubDataARB);
+ SET_DeleteBuffersARB(disp, _mesa_DeleteBuffersARB);
+ SET_GenBuffersARB(disp, _mesa_GenBuffersARB);
+ SET_GetBufferParameterivARB(disp, _mesa_GetBufferParameterivARB);
+ /* TODO: add GetBufferParameteri64v for desktop GL and GLES3 once tests
+ * exist for it.
+ */
+ SET_GetBufferPointervARB(disp, _mesa_GetBufferPointervARB);
+ if (ctx->API != API_OPENGLES2) {
+ SET_GetBufferSubDataARB(disp, _mesa_GetBufferSubDataARB);
+ }
+ SET_IsBufferARB(disp, _mesa_IsBufferARB);
+ SET_MapBufferARB(disp, _mesa_MapBufferARB);
+ SET_UnmapBufferARB(disp, _mesa_UnmapBufferARB);
+
+ if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx)) {
+ SET_BindBufferRangeEXT(disp, _mesa_BindBufferRange);
+ SET_BindBufferBaseEXT(disp, _mesa_BindBufferBase);
+ }
+
+ if (_mesa_is_desktop_gl(ctx)) {
+ SET_InvalidateBufferData(disp, _mesa_InvalidateBufferData);
+ SET_InvalidateBufferSubData(disp, _mesa_InvalidateBufferSubData);
+ }