[Mesa-dev] =?y?q?=5BPATCH=2013/18=5D=20mesa=3A=20Implement=20glBindBuffersBase=28=29?=
Fredrik Höglund
fredrik at kde.org
Tue Jan 21 15:35:51 PST 2014
---
src/mesa/main/bufferobj.c | 373 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 373 insertions(+)
diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index 9ef9dd0..aafaad7 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -2605,6 +2605,362 @@ bind_atomic_buffer(struct gl_context *ctx,
set_atomic_buffer_binding(ctx, binding, bufObj, offset, size);
}
+static bool
+error_check_bind_uniform_buffers(struct gl_context *ctx,
+ GLuint first, GLsizei count,
+ const char *caller)
+{
+ if (!ctx->Extensions.ARB_uniform_buffer_object) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "%s(target=GL_UNIFORM_BUFFER)", caller);
+ return false;
+ }
+
+ /* The ARB_multi_bind_spec says:
+ *
+ * "An INVALID_OPERATION error is generated if <first> + <count> is
+ * greater than the number of target-specific indexed binding points,
+ * as described in section 6.7.1."
+ */
+ if (first + count > ctx->Const.MaxUniformBufferBindings) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(first=%u + count=%u > the value of "
+ "GL_MAX_UNIFORM_BUFFER_BINDINGS=%u)",
+ caller, first, count,
+ ctx->Const.MaxUniformBufferBindings);
+ return false;
+ }
+
+ return true;
+}
+
+/**
+ * Unbind all uniform buffers in the range
+ * <first> through <first>+<count>-1
+ */
+static void
+unbind_uniform_buffers(struct gl_context *ctx, GLuint first, GLsizei count)
+{
+ struct gl_buffer_object *bufObj = ctx->Shared->NullBufferObj;
+ int i;
+
+ for (i = 0; i < count; i++)
+ set_ubo_binding(ctx, &ctx->UniformBufferBindings[first + i],
+ bufObj, -1, -1, GL_TRUE);
+}
+
+static void
+bind_uniform_buffers_base(struct gl_context *ctx, GLuint first, GLsizei count,
+ const GLuint *buffers)
+{
+ GLuint i;
+
+ if (!error_check_bind_uniform_buffers(ctx, first, count, "glBindBuffersBase"))
+ return;
+
+ /* Assume that at least one binding will be changed */
+ FLUSH_VERTICES(ctx, 0);
+ ctx->NewDriverState |= ctx->DriverFlags.NewUniformBuffer;
+
+ if (!buffers) {
+ /* The ARB_multi_bind spec says:
+ *
+ * "If <buffers> is NULL, all bindings from <first> through
+ * <first>+<count>-1 are reset to their unbound (zero) state."
+ */
+ unbind_uniform_buffers(ctx, first, count);
+ return;
+ }
+
+ /* Note that the error semantics for multi-bind commands differ from
+ * those of other GL commands.
+ *
+ * The Issues section in the ARB_multi_bind spec says:
+ *
+ * "(11) Typically, OpenGL specifies that if an error is generated by a
+ * command, that command has no effect. This is somewhat
+ * unfortunate for multi-bind commands, because it would require a
+ * first pass to scan the entire list of bound objects for errors
+ * and then a second pass to actually perform the bindings.
+ * Should we have different error semantics?
+ *
+ * RESOLVED: Yes. In this specification, when the parameters for
+ * one of the <count> binding points are invalid, that binding point
+ * is not updated and an error will be generated. However, other
+ * binding points in the same command will be updated if their
+ * parameters are valid and no other error occurs."
+ */
+
+ _mesa_begin_bufferobj_lookups(ctx);
+
+ for (i = 0; i < count; i++) {
+ struct gl_uniform_buffer_binding *binding =
+ &ctx->UniformBufferBindings[first + i];
+ struct gl_buffer_object *bufObj;
+
+ if (binding->BufferObject && binding->BufferObject->Name == buffers[i])
+ bufObj = binding->BufferObject;
+ else
+ bufObj = _mesa_bind_buffers_lookup_bufferobj(ctx, GL_UNIFORM_BUFFER,
+ buffers, i,
+ "glBindBuffersBase");
+
+ if (!bufObj)
+ continue;
+
+ if (bufObj == ctx->Shared->NullBufferObj)
+ set_ubo_binding(ctx, binding, bufObj, -1, -1, GL_TRUE);
+ else
+ set_ubo_binding(ctx, binding, bufObj, 0, 0, GL_TRUE);
+ }
+
+ _mesa_end_bufferobj_lookups(ctx);
+}
+
+static bool
+error_check_bind_xfb_buffers(struct gl_context *ctx,
+ struct gl_transform_feedback_object *tfObj,
+ GLuint first, GLsizei count, const char *caller)
+{
+ if (!ctx->Extensions.EXT_transform_feedback) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "%s(target=GL_TRANSFORM_FEEDBACK_BUFFER", caller);
+ return false;
+ }
+
+ /* Page 398 of the PDF of the OpenGL 4.4 (Core Profile) spec says:
+ *
+ * "An INVALID_OPERATION error is generated :
+ *
+ * ...
+ * • by BindBufferRange or BindBufferBase if target is TRANSFORM_-
+ * FEEDBACK_BUFFER and transform feedback is currently active."
+ *
+ * We assume that this is also meant to apply to BindBuffersRange
+ * and BindBuffersBase.
+ */
+ if (tfObj->Active) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(Changing transform feedback buffers while "
+ "transform feedback is active)", caller);
+ return false;
+ }
+
+ /* The ARB_multi_bind_spec says:
+ *
+ * "An INVALID_OPERATION error is generated if <first> + <count> is
+ * greater than the number of target-specific indexed binding points,
+ * as described in section 6.7.1."
+ */
+ if (first + count > ctx->Const.MaxTransformFeedbackBuffers) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(first=%u + count=%u > the value of "
+ "GL_MAX_TRANSFORM_FEEDBACK_BUFFERS=%u)",
+ caller, first, count,
+ ctx->Const.MaxTransformFeedbackBuffers);
+ return false;
+ }
+
+ return true;
+}
+
+/**
+ * Unbind all transform feedback buffers in the range
+ * <first> through <first>+<count>-1
+ */
+static void
+unbind_xfb_buffers(struct gl_context *ctx,
+ struct gl_transform_feedback_object *tfObj,
+ GLuint first, GLsizei count)
+{
+ struct gl_buffer_object * const bufObj = ctx->Shared->NullBufferObj;
+ int i;
+
+ for (i = 0; i < count; i++)
+ _mesa_set_transform_feedback_binding(ctx, tfObj, first + i,
+ bufObj, 0, 0);
+}
+
+static void
+bind_xfb_buffers_base(struct gl_context *ctx,
+ GLuint first, GLsizei count,
+ const GLuint *buffers)
+{
+ struct gl_transform_feedback_object *tfObj =
+ ctx->TransformFeedback.CurrentObject;
+ GLuint i;
+
+ if (!error_check_bind_xfb_buffers(ctx, tfObj, first, count,
+ "glBindBuffersBase"))
+ return;
+
+ /* Assume that at least one binding will be changed */
+ FLUSH_VERTICES(ctx, 0);
+ ctx->NewDriverState |= ctx->DriverFlags.NewTransformFeedback;
+
+ if (!buffers) {
+ /* The ARB_multi_bind spec says:
+ *
+ * "If <buffers> is NULL, all bindings from <first> through
+ * <first>+<count>-1 are reset to their unbound (zero) state."
+ */
+ unbind_xfb_buffers(ctx, tfObj, first, count);
+ return;
+ }
+
+ /* Note that the error semantics for multi-bind commands differ from
+ * those of other GL commands.
+ *
+ * The Issues section in the ARB_multi_bind spec says:
+ *
+ * "(11) Typically, OpenGL specifies that if an error is generated by a
+ * command, that command has no effect. This is somewhat
+ * unfortunate for multi-bind commands, because it would require a
+ * first pass to scan the entire list of bound objects for errors
+ * and then a second pass to actually perform the bindings.
+ * Should we have different error semantics?
+ *
+ * RESOLVED: Yes. In this specification, when the parameters for
+ * one of the <count> binding points are invalid, that binding point
+ * is not updated and an error will be generated. However, other
+ * binding points in the same command will be updated if their
+ * parameters are valid and no other error occurs."
+ */
+
+ _mesa_begin_bufferobj_lookups(ctx);
+
+ for (i = 0; i < count; i++) {
+ struct gl_buffer_object * const boundBufObj = tfObj->Buffers[first + i];
+ struct gl_buffer_object *bufObj;
+
+ if (boundBufObj && boundBufObj->Name == buffers[i])
+ bufObj = boundBufObj;
+ else
+ bufObj = _mesa_bind_buffers_lookup_bufferobj(ctx, GL_TRANSFORM_FEEDBACK_BUFFER,
+ buffers, i, "glBindBuffersBase");
+
+ if (!bufObj)
+ continue;
+
+ _mesa_set_transform_feedback_binding(ctx, tfObj, first + i,
+ bufObj, 0, 0);
+ }
+
+ _mesa_end_bufferobj_lookups(ctx);
+}
+
+static bool
+error_check_bind_atomic_buffers(struct gl_context *ctx,
+ GLuint first, GLsizei count,
+ const char *caller)
+{
+ if (!ctx->Extensions.ARB_shader_atomic_counters) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "%s(target=GL_ATOMIC_COUNTER_BUFFER", caller);
+ return false;
+ }
+
+ /* The ARB_multi_bind_spec says:
+ *
+ * "An INVALID_OPERATION error is generated if <first> + <count> is
+ * greater than the number of target-specific indexed binding points,
+ * as described in section 6.7.1."
+ */
+ if (first + count > ctx->Const.MaxAtomicBufferBindings) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "%s(first=%u + count=%u > the value of "
+ "GL_MAX_ATOMIC_BUFFER_BINDINGS=%u)",
+ caller, first, count, ctx->Const.MaxAtomicBufferBindings);
+ return false;
+ }
+
+ return true;
+}
+
+/**
+ * Unbind all atomic counter buffers in the range
+ * <first> through <first>+<count>-1
+ */
+static void
+unbind_atomic_buffers(struct gl_context *ctx, GLuint first, GLsizei count)
+{
+ struct gl_buffer_object * const bufObj = ctx->Shared->NullBufferObj;
+ int i;
+
+ for (i = 0; i < count; i++)
+ set_atomic_buffer_binding(ctx, &ctx->AtomicBufferBindings[first + i],
+ bufObj, -1, -1);
+}
+
+static void
+bind_atomic_buffers_base(struct gl_context *ctx,
+ GLuint first,
+ GLsizei count,
+ const GLuint *buffers)
+{
+ int i;
+
+ if (!error_check_bind_atomic_buffers(ctx, first, count,
+ "glBindBuffersBase"))
+ return;
+
+ /* Assume that at least one binding will be changed */
+ FLUSH_VERTICES(ctx, 0);
+ ctx->NewDriverState |= ctx->DriverFlags.NewAtomicBuffer;
+
+ if (!buffers) {
+ /* The ARB_multi_bind spec says:
+ *
+ * "If <buffers> is NULL, all bindings from <first> through
+ * <first>+<count>-1 are reset to their unbound (zero) state."
+ */
+ unbind_atomic_buffers(ctx, first, count);
+ return;
+ }
+
+ /* Note that the error semantics for multi-bind commands differ from
+ * those of other GL commands.
+ *
+ * The Issues section in the ARB_multi_bind spec says:
+ *
+ * "(11) Typically, OpenGL specifies that if an error is generated by a
+ * command, that command has no effect. This is somewhat
+ * unfortunate for multi-bind commands, because it would require a
+ * first pass to scan the entire list of bound objects for errors
+ * and then a second pass to actually perform the bindings.
+ * Should we have different error semantics?
+ *
+ * RESOLVED: Yes. In this specification, when the parameters for
+ * one of the <count> binding points are invalid, that binding point
+ * is not updated and an error will be generated. However, other
+ * binding points in the same command will be updated if their
+ * parameters are valid and no other error occurs."
+ */
+
+ _mesa_begin_bufferobj_lookups(ctx);
+
+ for (i = 0; i < count; i++) {
+ struct gl_atomic_buffer_binding *binding =
+ &ctx->AtomicBufferBindings[first + i];
+ struct gl_buffer_object *bufObj;
+
+ if (binding->BufferObject && binding->BufferObject->Name == buffers[i])
+ bufObj = binding->BufferObject;
+ else
+ bufObj = _mesa_bind_buffers_lookup_bufferobj(ctx,
+ GL_ATOMIC_COUNTER_BUFFER,
+ buffers, i,
+ "glBindBuffersBase");
+
+ if (!bufObj)
+ continue;
+
+ set_atomic_buffer_binding(ctx, binding, bufObj, 0, 0);
+ }
+
+ _mesa_end_bufferobj_lookups(ctx);
+}
+
void GLAPIENTRY
_mesa_BindBufferRange(GLenum target, GLuint index,
GLuint buffer, GLintptr offset, GLsizeiptr size)
@@ -2728,6 +3084,23 @@ void GLAPIENTRY
_mesa_BindBuffersBase(GLenum target, GLuint first, GLsizei count,
const GLuint *buffers)
{
+ GET_CURRENT_CONTEXT(ctx);
+
+ switch (target) {
+ case GL_TRANSFORM_FEEDBACK_BUFFER:
+ bind_xfb_buffers_base(ctx, first, count, buffers);
+ return;
+ case GL_UNIFORM_BUFFER:
+ bind_uniform_buffers_base(ctx, first, count, buffers);
+ return;
+ case GL_ATOMIC_COUNTER_BUFFER:
+ bind_atomic_buffers_base(ctx, first, count, buffers);
+ return;
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glBindBuffersBase(target=%s)",
+ _mesa_lookup_enum_by_nr(target));
+ break;
+ }
}
void GLAPIENTRY
--
1.7.10.4
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