This patch replaces the three ir_variable_mode enums:
- ir_var_in
- ir_var_out
- ir_var_inout
with the following five:
- ir_var_shader_in
- ir_var_shader_out
- ir_var_function_in
- ir_var_function_out
- ir_var_function_inout
This eliminates a frustrating ambiguity: it used to be impossible to
tell whether an ir_var_{in,out} variable was a shader in/out or a
function in/out without seeing where the variable was declared in the
IR. This complicated some optimization and lowering passes, and would
have become a problem for implementing varying structs.
In the lisp-style serialization of GLSL IR to strings performed by
ir_print_visitor.cpp and ir_reader.cpp, I've retained the names "in",
"out", and "inout" for function parameters, to avoid introducing code
churn to the src/glsl/builtins/ir/ directory.
Note: a couple of comments in the code seemed to indicate that we were
planning for a possible future in which geometry shaders could have
shader-scope inout variables. Our GLSL grammar rejects shader-scope
inout variables, and I've been unable to find any evidence in the GLSL
standards documents (or extensions) that this will ever be allowed, so
I've eliminated these comments.
Reviewed-by: Carl Worth <cworth@cworth.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
As the preprocessor becomes more sophisticated and gains more optional
behavior, it's easiest to just pass the GL context pointer to it so that
it can examine any fields there that it needs to (such as API version,
or the state of any driconf options, etc.).
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
All flags are now gone, so we can stop storing and passing this around.
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This symbol with dricore escapes into the namespace, its too generic,
we should prefix it with something just to be nice.
Should be applied to stable + 9.0
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Drivers will probably want to be able to take UBO references in a
shader like:
uniform ubo1 {
float a;
float b;
float c;
float d;
}
void main() {
gl_FragColor = vec4(a, b, c, d);
}
and generate a single aligned vec4 load out of the UBO. For intel,
this involves recognizing the shared offset of the aligned loads and
CSEing them out. Obviously that involves breaking things down to
loads from an offset from a particular UBO first. Thus, the driver
doesn't want to see
variable_ref(ir_variable("a")),
and even more so does it not want to see
array_ref(record_ref(variable_ref(ir_variable("a")),
"field1"), variable_ref(ir_variable("i"))).
where a.field1[i] is a row_major matrix.
Instead, we're going to make a lowering pass to break UBO references
down to expressions that are obvious to codegen, and amenable to
merging through CSE.
v2: Fix some partial thoughts in the ir_binop comment (review by Kenneth)
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Previously, the code for setting this flag for GLSL programs was
duplicated in three places: brw_link_shader(), glsl_to_tgsi_visitor,
and ir_to_mesa_visitor. In addition to the unnecessary duplication,
there was a performance problem on i965: brw_link_shader() set the
flag before doing its final round of optimizations, which meant that
if the optimizations managed to eliminate all the discard operations,
the flag would still be set, resulting (at least in theory) in slower
performance.
This patch consolidates all of the code that sets UsesKill for GLSL
programs into do_set_program_inouts(), which already is doing a
similar job for UsesDFdy, and which occurs after i965's final round of
optimizations.
Non-GLSL programs (ARB programs and the state tracker's glBitmap
program) are unaffected.
Reviewed-by: Eric Anholt <eric@anholt.net>
TGSI doesn't need an opcode, since registers are untyped (but beware
once doubles come into the scene). Mesa IR doesn't handle native
integers, so trying to handle them there is worthless, the case
entries are only added for warning reasons.
It was only tested with softpipe, since llvmpipe doesn't support glsl
1.3 yet.
Signed-off-by: Olivier Galibert <galibert@pobox.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
The linker may have set initial values for uniforms. Propagate these
values to the driver's backing storage when it is first associated.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Fix uninitialized scalar field defect reported by Coverity.
NOTE: This is a candidate for the 8.0 branch.
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Brian Paul <brianp@vmware.com>
While ir_to_mesa contains code that attempts to support functions, I
honestly doubt it's been tested and have little confidence that it
works.
The comment in visit(ir_function *ir) doesn't inspire confidence:
/* Ignore function bodies other than main() -- we shouldn't see calls to
* them since they should all be inlined before we get to ir_to_mesa.
*/
Furthermore, hardware drivers such as i915, i965, and (AFAICT) r200
don't support the BGNSUB/ENDSUB/CAL opcodes anyway. Only swrast does.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Previously, set_callee() performed some assertions about the type of the
ir_call; protecting the bare pointer ensured these checks would be run.
However, ir_call no longer has a type, so the getter and setter methods
don't actually do anything useful. Remove them in favor of accessing
callee directly, as is done with most other fields in our IR.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
It used to be done in ir_to_mesa, and that was kind of a bad place.
I didn't change st_glsl_to_tgsi because there is some strange stuff
happening in the code that generates glDrawPixels shaders. It looked
like this would break horribly if I touched anything.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Track the calculated data in gl_shader_program instead of the
individual assembly shaders.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Don't call set_unfiform_initializers if link failed, or it would trigger
a GL_INVALID_OPERATION error. That's not an expected behavior of
glLinkProgram function.
Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Reviewed-by: Paul Berry <stereotype441@gmail.com>
Switch all of the code in ir_to_mesa, st_glsl_to_tgsi, glUniform*,
glGetUniform, glGetUniformLocation, and glGetActiveUniforms to use the
gl_uniform_storage structures in the gl_shader_program.
A couple of notes:
* Like most rewrite-the-world patches, this should be reviewed by
applying the patch and examining the modified functions.
* This leaves a lot of dead code around in linker.cpp and
uniform_query.cpp. This will be deleted in the next patches.
v2: Update the comment block (previously a FINISHME) in _mesa_uniform
about generating GL_INVALID_VALUE when an out-of-range sampler index
is specified.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Tested-by: Tom Stellard <thomas.stellard@amd.com>
Connects all of the gl_program_parameter structures with the correct
gl_uniform_storage structures.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Tested-by: Tom Stellard <thomas.stellard@amd.com>
This is an OpenGL ES specific extension. External textures are textures that
may be sampled from, but not be updated (no glTexSubImage* and etc.). The
image data are taken from an EGLImage.
Reviewed-by: Brian Paul <brianp@vmware.com>
Acked-by: Jakob Bornecrantz <jakob@vmware.com>
Previously check_resources could fail, but we'd still try to optimize
the shader, do device-specific code generation, etc. In some cases,
this could explode (especially in the device-specific code
generation). I haven't found that I could trigger this with the
current code. When too many samplers were used with the new uniform
handling code, I observed several crashes deep down in the driver.
NOTE: This is candidate for the 7.11 branch.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=41609
Cc: Eric Anholt <eric@anholt.net>
Reviewed-and-tested-by: Kenneth Graunke <kenneth@whitecape.org>
This patch makes GLSL interpolation qualifiers visible to drivers via
the array InterpQualifier[] in gl_fragment_program, so that they can
easily be used by driver back-ends to select the correct interpolation
mode.
Previous to this patch, the GLSL compiler was using the enum
ir_variable_interpolation to represent interpolation types. Rather
than make a duplicate enum in core mesa to represent the same thing, I
moved the enum into mtypes.h and renamed it to be more consistent with
the other enums defined there.
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Generate the program parameters list by walking the IR instead of by
walking the list of linked uniforms. This simplifies the code quite a
bit, and is probably a bit more correct. The list of linked uniforms
should really only be used by the GL API to interact with the
application.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: Bryan Cain <bryancain3@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Having a few of these includes or forward declarations inside the
'extern "C"' block can cause problems later. Specifically, it
prevents C++ linkage functions from being added to ir_to_mesa.h and
makes G++ angry if 'struct foo' is seen both inside and outside an
'extern "C"'.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Drivers implementing GLSL 1.30 want to do integer modulus, and until we
can stop generating code via ir_to_mesa, it's easier to make it silently
generate rubbish code. Multiply will do.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Tested-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
For hardware drivers, we only have ir_to_mesa called for the purposes
of potential swrast fallbacks (basically never on a 1.30 driver),
which we don't really care about. This will allow 1.30 to be
implemented without rewriting swrast for it.
Reviewed-by: Chad Versace <chad@chad-versace.us>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
GLSL 1.30 requires us to use gl_ClipDistance for clipping if the
vertex shader contains a static write to it, and otherwise use
user-defined clipping planes. Since the driver needs to behave
differently in these two cases, we need a flag to record whether the
shader has written to gl_ClipDistance.
The new flag is called UsesClipDistance. We initially store it in
gl_shader_program (since that is the data structure that is available
when we check to see whethe gl_ClipDistance was written to), and we
later copy it to a flag with the same name in gl_vertex_program, since
that is a more convenient place for the driver to access it (in i965,
at least).
Reviewed-by: Eric Anholt <eric@anholt.net>
Tested-by: Brian Paul <brianp@vmware.com>
This is a better, more fine-grained way of lowering if statements. Fixes the
game And Yet It Moves on nv50.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Using multiply and reciprocal for integer division involves potentially
lossy floating point conversions. This is okay for older GPUs that
represent integers as floating point, but undesirable for GPUs with
native integer division instructions.
TGSI, for example, has UDIV/IDIV instructions for integer division,
so it makes sense to handle this directly. Likewise for i965.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Bryan Cain <bryancain3@gmail.com>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
!a && b occurs frequently when nexted if-statements have been
flattened. It should also be possible use a MAD for (a && b) || c,
though that would require a MAD_SAT.
Reviewed-by: Eric Anholt <eric@anholt.net>
