[Mesa-dev,15/19] mesa: Implement glBindBuffersRange

Submitted by Fredrik Höglund on April 21, 2014, 9:57 p.m.

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Message ID 1398117477-10313-16-git-send-email-fredrik@kde.org
State New
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Commit Message

Fredrik Höglund April 21, 2014, 9:57 p.m.
---
 src/mesa/main/bufferobj.c | 370 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 370 insertions(+)

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diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index 3e45ae0..23e3d7a 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -2790,6 +2790,39 @@  bind_atomic_buffer(struct gl_context *ctx,
    set_atomic_buffer_binding(ctx, binding, bufObj, offset, size);
 }
 
+static inline bool
+bind_buffers_check_offset_and_size(struct gl_context *ctx,
+                                   GLuint index,
+                                   const GLintptr *offsets,
+                                   const GLsizeiptr *sizes)
+{
+   if (offsets[index] < 0) {
+     /* The ARB_multi_bind spec says:
+      *
+      *    "An INVALID_VALUE error is generated by BindBuffersRange if any
+      *     value in <offsets> is less than zero (per binding)."
+      */
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glBindBuffersRange(offsets[%u]=%lld < 0)",
+                  index, (long long int) offsets[index]);
+      return false;
+   }
+
+   if (sizes[index] <= 0) {
+     /* The ARB_multi_bind spec says:
+      *
+      *     "An INVALID_VALUE error is generated by BindBuffersRange if any
+      *      value in <sizes> is less than or equal to zero (per binding)."
+      */
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glBindBuffersRange(sizes[%u]=%lld <= 0)",
+                  index, (long long int) sizes[index]);
+      return false;
+   }
+
+   return true;
+}
+
 static bool
 error_check_bind_uniform_buffers(struct gl_context *ctx,
                                  GLuint first, GLsizei count,
@@ -2901,6 +2934,112 @@  bind_uniform_buffers_base(struct gl_context *ctx, GLuint first, GLsizei count,
    _mesa_end_bufferobj_lookups(ctx);
 }
 
+static void
+bind_uniform_buffers_range(struct gl_context *ctx, GLuint first, GLsizei count,
+                           const GLuint *buffers,
+                           const GLintptr *offsets, const GLsizeiptr *sizes)
+{
+   GLuint i;
+
+   if (!error_check_bind_uniform_buffers(ctx, first, count,
+                                         "glBindBuffersRange"))
+      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.
+       *     In this case, the offsets and sizes associated with the
+       *     binding points are set to default values, ignoring
+       *     <offsets> and <sizes>."
+       */
+      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 (!bind_buffers_check_offset_and_size(ctx, i, offsets, sizes))
+         continue;
+
+      /* The ARB_multi_bind spec says:
+       *
+       *     "An INVALID_VALUE error is generated by BindBuffersRange if any
+       *      pair of values in <offsets> and <sizes> does not respectively
+       *      satisfy the constraints described for those parameters for the
+       *      specified target, as described in section 6.7.1 (per binding)."
+       *
+       * Section 6.7.1 refers to table 6.5, which says:
+       *
+       *     "┌───────────────────────────────────────────────────────────────┐
+       *      │ Uniform buffer array bindings (see sec. 7.6)                  │
+       *      ├─────────────────────┬─────────────────────────────────────────┤
+       *      │  ...                │  ...                                    │
+       *      │  offset restriction │  multiple of value of UNIFORM_BUFFER_-  │
+       *      │                     │  OFFSET_ALIGNMENT                       │
+       *      │  ...                │  ...                                    │
+       *      │  size restriction   │  none                                   │
+       *      └─────────────────────┴─────────────────────────────────────────┘"
+       */
+      if (offsets[i] & (ctx->Const.UniformBufferOffsetAlignment - 1)) {
+         _mesa_error(ctx, GL_INVALID_VALUE,
+                     "glBindBuffersRange(offsets[%u]=%lld is misaligned; "
+                     "it must be a multiple of the value of "
+                     "GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT=%u when "
+                     "target=GL_UNIFORM_BUFFER)",
+                     i, (long long int) offsets[i],
+                     ctx->Const.UniformBufferOffsetAlignment);
+         continue;
+      }
+
+      if (binding->BufferObject && binding->BufferObject->Name == buffers[i])
+         bufObj = binding->BufferObject;
+      else
+         bufObj = _mesa_multi_bind_lookup_bufferobj(ctx, GL_UNIFORM_BUFFER,
+                                                    buffers, i,
+                                                    "glBindBuffersRange");
+
+      if (bufObj) {
+         if (bufObj == ctx->Shared->NullBufferObj)
+            set_ubo_binding(ctx, binding, bufObj, -1, -1, GL_TRUE);
+         else
+            set_ubo_binding(ctx, binding, bufObj,
+                            offsets[i], sizes[i], GL_FALSE);
+      }
+   }
+
+   _mesa_end_bufferobj_lookups(ctx);
+}
+
 static bool
 error_check_bind_xfb_buffers(struct gl_context *ctx,
                              struct gl_transform_feedback_object *tfObj,
@@ -3031,6 +3170,117 @@  bind_xfb_buffers_base(struct gl_context *ctx,
    _mesa_end_bufferobj_lookups(ctx);
 }
 
+static void
+bind_xfb_buffers_range(struct gl_context *ctx,
+                       GLuint first, GLsizei count,
+                       const GLuint *buffers,
+                       const GLintptr *offsets,
+                       const GLsizeiptr *sizes)
+{
+   struct gl_transform_feedback_object *tfObj =
+       ctx->TransformFeedback.CurrentObject;
+   GLuint i;
+
+   if (!error_check_bind_xfb_buffers(ctx, tfObj, first, count,
+                                     "glBindBuffersRange"))
+      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.
+       *     In this case, the offsets and sizes associated with the
+       *     binding points are set to default values, ignoring
+       *     <offsets> and <sizes>."
+       */
+      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++) {
+      const GLuint index = first + i;
+      struct gl_buffer_object * const boundBufObj = tfObj->Buffers[index];
+      struct gl_buffer_object *bufObj;
+
+      if (!bind_buffers_check_offset_and_size(ctx, i, offsets, sizes))
+         continue;
+
+      /* The ARB_multi_bind spec says:
+       *
+       *     "An INVALID_VALUE error is generated by BindBuffersRange if any
+       *      pair of values in <offsets> and <sizes> does not respectively
+       *      satisfy the constraints described for those parameters for the
+       *      specified target, as described in section 6.7.1 (per binding)."
+       *
+       * Section 6.7.1 refers to table 6.5, which says:
+       *
+       *     "┌───────────────────────────────────────────────────────────────┐
+       *      │ Transform feedback array bindings (see sec. 13.2.2)           │
+       *      ├───────────────────────┬───────────────────────────────────────┤
+       *      │    ...                │    ...                                │
+       *      │    offset restriction │    multiple of 4                      │
+       *      │    ...                │    ...                                │
+       *      │    size restriction   │    multiple of 4                      │
+       *      └───────────────────────┴───────────────────────────────────────┘"
+       */
+      if (offsets[i] & 0x3) {
+         _mesa_error(ctx, GL_INVALID_VALUE,
+                     "glBindBuffersRange(offsets[%u]=%lld is misaligned; "
+                     "it must be a multiple of 4 when "
+                     "target=GL_TRANSFORM_FEEDBACK_BUFFER)",
+                     i, (long long int) offsets[i]);
+         continue;
+      }
+
+      if (sizes[i] & 0x3) {
+         _mesa_error(ctx, GL_INVALID_VALUE,
+                     "glBindBuffersRange(sizes[%u]=%lld is misaligned; "
+                     "it must be a multiple of 4 when "
+                     "target=GL_TRANSFORM_FEEDBACK_BUFFER)",
+                     i, (long long int) sizes[i]);
+         continue;
+      }
+
+      if (boundBufObj && boundBufObj->Name == buffers[i])
+         bufObj = boundBufObj;
+      else
+         bufObj = _mesa_multi_bind_lookup_bufferobj(ctx, GL_TRANSFORM_FEEDBACK_BUFFER,
+                                                    buffers, i, "glBindBuffersRange");
+
+      if (bufObj)
+         _mesa_set_transform_feedback_binding(ctx, tfObj, index, bufObj,
+                                              offsets[i], sizes[i]);
+   }
+
+   _mesa_end_bufferobj_lookups(ctx);
+}
+
 static bool
 error_check_bind_atomic_buffers(struct gl_context *ctx,
                                 GLuint first, GLsizei count,
@@ -3141,6 +3391,108 @@  bind_atomic_buffers_base(struct gl_context *ctx,
    _mesa_end_bufferobj_lookups(ctx);
 }
 
+static void
+bind_atomic_buffers_range(struct gl_context *ctx,
+                          GLuint first,
+                          GLsizei count,
+                          const GLuint *buffers,
+                          const GLintptr *offsets,
+                          const GLsizeiptr *sizes)
+{
+   int i;
+
+   if (!error_check_bind_atomic_buffers(ctx, first, count,
+                                        "glBindBuffersRange"))
+     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.
+       *     In this case, the offsets and sizes associated with the
+       *     binding points are set to default values, ignoring
+       *     <offsets> and <sizes>."
+       */
+      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 (!bind_buffers_check_offset_and_size(ctx, i, offsets, sizes))
+         continue;
+
+      /* The ARB_multi_bind spec says:
+       *
+       *     "An INVALID_VALUE error is generated by BindBuffersRange if any
+       *      pair of values in <offsets> and <sizes> does not respectively
+       *      satisfy the constraints described for those parameters for the
+       *      specified target, as described in section 6.7.1 (per binding)."
+       *
+       * Section 6.7.1 refers to table 6.5, which says:
+       *
+       *     "┌───────────────────────────────────────────────────────────────┐
+       *      │ Atomic counter array bindings (see sec. 7.7.2)                │
+       *      ├───────────────────────┬───────────────────────────────────────┤
+       *      │    ...                │    ...                                │
+       *      │    offset restriction │    multiple of 4                      │
+       *      │    ...                │    ...                                │
+       *      │    size restriction   │    none                               │
+       *      └───────────────────────┴───────────────────────────────────────┘"
+       */
+      if (offsets[i] & (ATOMIC_COUNTER_SIZE - 1)) {
+         _mesa_error(ctx, GL_INVALID_VALUE,
+                     "glBindBuffersRange(offsets[%u]=%lld is misaligned; "
+                     "it must be a multiple of %d when "
+                     "target=GL_ATOMIC_COUNTER_BUFFER)",
+                     i, (long long int) offsets[i], ATOMIC_COUNTER_SIZE);
+         continue;
+      }
+
+      if (binding->BufferObject && binding->BufferObject->Name == buffers[i])
+         bufObj = binding->BufferObject;
+      else
+         bufObj = _mesa_multi_bind_lookup_bufferobj(ctx,
+                                                    GL_ATOMIC_COUNTER_BUFFER,
+                                                    buffers, i,
+                                                    "glBindBuffersRange");
+
+      if (bufObj)
+         set_atomic_buffer_binding(ctx, binding, bufObj, offsets[i], sizes[i]);
+   }
+
+   _mesa_end_bufferobj_lookups(ctx);
+}
+
 void GLAPIENTRY
 _mesa_BindBufferRange(GLenum target, GLuint index,
                       GLuint buffer, GLintptr offset, GLsizeiptr size)
@@ -3258,6 +3610,24 @@  _mesa_BindBuffersRange(GLenum target, GLuint first, GLsizei count,
                        const GLuint *buffers,
                        const GLintptr *offsets, const GLsizeiptr *sizes)
 {
+   GET_CURRENT_CONTEXT(ctx);
+
+   switch (target) {
+   case GL_TRANSFORM_FEEDBACK_BUFFER:
+      bind_xfb_buffers_range(ctx, first, count, buffers, offsets, sizes);
+      return;
+   case GL_UNIFORM_BUFFER:
+      bind_uniform_buffers_range(ctx, first, count, buffers, offsets, sizes);
+      return;
+   case GL_ATOMIC_COUNTER_BUFFER:
+      bind_atomic_buffers_range(ctx, first, count, buffers,
+                                offsets, sizes);
+      return;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBindBuffersRange(target=%s)",
+                  _mesa_lookup_enum_by_nr(target));
+      break;
+   }
 }
 
 void GLAPIENTRY