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Diffstat (limited to 'mesalib/src/glsl/link_uniforms.cpp')
-rw-r--r--mesalib/src/glsl/link_uniforms.cpp78
1 files changed, 76 insertions, 2 deletions
diff --git a/mesalib/src/glsl/link_uniforms.cpp b/mesalib/src/glsl/link_uniforms.cpp
index 1c97e1957..1cf376d5d 100644
--- a/mesalib/src/glsl/link_uniforms.cpp
+++ b/mesalib/src/glsl/link_uniforms.cpp
@@ -240,7 +240,8 @@ class count_uniform_size : public program_resource_visitor {
public:
count_uniform_size(struct string_to_uint_map *map)
: num_active_uniforms(0), num_values(0), num_shader_samplers(0),
- num_shader_uniform_components(0), is_ubo_var(false), map(map)
+ num_shader_images(0), num_shader_uniform_components(0),
+ is_ubo_var(false), map(map)
{
/* empty */
}
@@ -248,6 +249,7 @@ public:
void start_shader()
{
this->num_shader_samplers = 0;
+ this->num_shader_images = 0;
this->num_shader_uniform_components = 0;
}
@@ -277,6 +279,11 @@ public:
unsigned num_shader_samplers;
/**
+ * Number of images used
+ */
+ unsigned num_shader_images;
+
+ /**
* Number of uniforms used in the current shader
*/
unsigned num_shader_uniform_components;
@@ -303,6 +310,15 @@ private:
if (type->contains_sampler()) {
this->num_shader_samplers +=
type->is_array() ? type->array_size() : 1;
+ } else if (type->contains_image()) {
+ this->num_shader_images += values;
+
+ /* As drivers are likely to represent image uniforms as
+ * scalar indices, count them against the limit of uniform
+ * components in the default block. The spec allows image
+ * uniforms to use up no more than one scalar slot.
+ */
+ this->num_shader_uniform_components += values;
} else {
/* Accumulate the total number of uniform slots used by this shader.
* Note that samplers do not count against this limit because they
@@ -364,6 +380,7 @@ public:
this->shader_samplers_used = 0;
this->shader_shadow_samplers = 0;
this->next_sampler = 0;
+ this->next_image = 0;
memset(this->targets, 0, sizeof(this->targets));
}
@@ -460,6 +477,24 @@ private:
}
}
+ void handle_images(const glsl_type *base_type,
+ struct gl_uniform_storage *uniform)
+ {
+ if (base_type->is_image()) {
+ uniform->image[shader_type].index = this->next_image;
+ uniform->image[shader_type].active = true;
+
+ /* Increment the image index by 1 for non-arrays and by the
+ * number of array elements for arrays.
+ */
+ this->next_image += MAX2(1, uniform->array_elements);
+
+ } else {
+ uniform->image[shader_type].index = ~0;
+ uniform->image[shader_type].active = false;
+ }
+ }
+
virtual void visit_field(const glsl_type *type, const char *name,
bool row_major)
{
@@ -495,8 +530,9 @@ private:
base_type = type;
}
- /* This assigns sampler uniforms to sampler units. */
+ /* This assigns uniform indices to sampler and image uniforms. */
handle_samplers(base_type, &this->uniforms[id]);
+ handle_images(base_type, &this->uniforms[id]);
/* If there is already storage associated with this uniform, it means
* that it was set while processing an earlier shader stage. For
@@ -554,6 +590,7 @@ private:
struct gl_uniform_storage *uniforms;
unsigned next_sampler;
+ unsigned next_image;
public:
union gl_constant_value *values;
@@ -720,6 +757,40 @@ link_assign_uniform_block_offsets(struct gl_shader *shader)
}
}
+/**
+ * Scan the program for image uniforms and store image unit access
+ * information into the gl_shader data structure.
+ */
+static void
+link_set_image_access_qualifiers(struct gl_shader_program *prog)
+{
+ for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) {
+ gl_shader *sh = prog->_LinkedShaders[i];
+
+ if (sh == NULL)
+ continue;
+
+ foreach_list(node, sh->ir) {
+ ir_variable *var = ((ir_instruction *) node)->as_variable();
+
+ if (var && var->data.mode == ir_var_uniform &&
+ var->type->contains_image()) {
+ unsigned id;
+ bool found = prog->UniformHash->get(id, var->name);
+ assert(found);
+ const gl_uniform_storage *storage = &prog->UniformStorage[id];
+ const unsigned index = storage->image[i].index;
+ const GLenum access = (var->data.image.read_only ? GL_READ_ONLY :
+ var->data.image.write_only ? GL_WRITE_ONLY :
+ GL_READ_WRITE);
+
+ for (unsigned j = 0; j < MAX2(1, storage->array_elements); ++j)
+ sh->ImageAccess[index + j] = access;
+ }
+ }
+ }
+}
+
void
link_assign_uniform_locations(struct gl_shader_program *prog)
{
@@ -757,6 +828,7 @@ link_assign_uniform_locations(struct gl_shader_program *prog)
* types cannot have initializers."
*/
memset(sh->SamplerUnits, 0, sizeof(sh->SamplerUnits));
+ memset(sh->ImageUnits, 0, sizeof(sh->ImageUnits));
link_update_uniform_buffer_variables(sh);
@@ -782,6 +854,7 @@ link_assign_uniform_locations(struct gl_shader_program *prog)
}
sh->num_samplers = uniform_size.num_shader_samplers;
+ sh->NumImages = uniform_size.num_shader_images;
sh->num_uniform_components = uniform_size.num_shader_uniform_components;
sh->num_combined_uniform_components = sh->num_uniform_components;
@@ -862,6 +935,7 @@ link_assign_uniform_locations(struct gl_shader_program *prog)
prog->NumUserUniformStorage = num_user_uniforms;
prog->UniformStorage = uniforms;
+ link_set_image_access_qualifiers(prog);
link_set_uniform_initializers(prog);
return;