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mesa: Implement _mesa_BindBufferBase for target GL_SHADER_STORAGE_BUFFER

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Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Iago Toral Quiroga 2015-03-19 11:37:43 +01:00 • committed by Samuel Iglesias Gonsalvez
parent 7b0d0a2bf2
commit 8a1d58bd61
1 changed files with 56 additions and 0 deletions
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56
src/mesa/main/bufferobj.c
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@ -3091,6 +3091,37 @@ bind_uniform_buffer(struct gl_context *ctx,
set_ubo_binding(ctx, binding, bufObj, offset, size, autoSize);
}
/**
* Binds a buffer object to a shader storage buffer binding point.
*
* Unlike set_ssbo_binding(), this function also flushes vertices
* and updates NewDriverState. It also checks if the binding
* has actually changed before updating it.
*/
static void
bind_shader_storage_buffer(struct gl_context *ctx,
GLuint index,
struct gl_buffer_object *bufObj,
GLintptr offset,
GLsizeiptr size,
GLboolean autoSize)
{
struct gl_shader_storage_buffer_binding *binding =
&ctx->ShaderStorageBufferBindings[index];
if (binding->BufferObject == bufObj &&
binding->Offset == offset &&
binding->Size == size &&
binding->AutomaticSize == autoSize) {
return;
}
FLUSH_VERTICES(ctx, 0);
ctx->NewDriverState |= ctx->DriverFlags.NewShaderStorageBuffer;
set_ssbo_binding(ctx, binding, bufObj, offset, size, autoSize);
}
/**
* Bind a region of a buffer object to a uniform block binding point.
* \param index the uniform buffer binding point index
@ -3149,6 +3180,28 @@ bind_buffer_base_uniform_buffer(struct gl_context *ctx,
bind_uniform_buffer(ctx, index, bufObj, 0, 0, GL_TRUE);
}
/**
* Bind a buffer object to a shader storage block binding point.
* As above, but offset = 0.
*/
static void
bind_buffer_base_shader_storage_buffer(struct gl_context *ctx,
GLuint index,
struct gl_buffer_object *bufObj)
{
if (index >= ctx->Const.MaxShaderStorageBufferBindings) {
_mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index);
return;
}
_mesa_reference_buffer_object(ctx, &ctx->ShaderStorageBuffer, bufObj);
if (bufObj == ctx->Shared->NullBufferObj)
bind_shader_storage_buffer(ctx, index, bufObj, -1, -1, GL_TRUE);
else
bind_shader_storage_buffer(ctx, index, bufObj, 0, 0, GL_TRUE);
}
/**
* Binds a buffer object to an atomic buffer binding point.
*
@ -4240,6 +4293,9 @@ _mesa_BindBufferBase(GLenum target, GLuint index, GLuint buffer)
case GL_UNIFORM_BUFFER:
bind_buffer_base_uniform_buffer(ctx, index, bufObj);
return;
case GL_SHADER_STORAGE_BUFFER:
bind_buffer_base_shader_storage_buffer(ctx, index, bufObj);
return;
case GL_ATOMIC_COUNTER_BUFFER:
bind_atomic_buffer(ctx, index, bufObj, 0, 0,
"glBindBufferBase");