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/*
* Copyright (C) 2017-2018 Rob Clark <robclark@freedesktop.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Rob Clark <robclark@freedesktop.org>
*/
#include "ir3_image.h"
/*
* SSBO/Image to/from IBO/tex hw mapping table:
*/
void
ir3_ibo_mapping_init(struct ir3_ibo_mapping *mapping, unsigned num_textures)
{
memset(mapping, IBO_INVALID, sizeof(*mapping));
mapping->num_ibo = 0;
mapping->num_tex = 0;
mapping->tex_base = num_textures;
}
unsigned
ir3_ssbo_to_ibo(struct ir3_ibo_mapping *mapping, unsigned ssbo)
{
if (mapping->ssbo_to_ibo[ssbo] == IBO_INVALID) {
unsigned ibo = mapping->num_ibo++;
mapping->ssbo_to_ibo[ssbo] = ibo;
mapping->ibo_to_image[ibo] = IBO_SSBO | ssbo;
}
return mapping->ssbo_to_ibo[ssbo];
}
unsigned
ir3_ssbo_to_tex(struct ir3_ibo_mapping *mapping, unsigned ssbo)
{
if (mapping->ssbo_to_tex[ssbo] == IBO_INVALID) {
unsigned tex = mapping->num_tex++;
mapping->ssbo_to_tex[ssbo] = tex;
mapping->tex_to_image[tex] = IBO_SSBO | ssbo;
}
return mapping->ssbo_to_tex[ssbo] + mapping->tex_base;
}
unsigned
ir3_image_to_ibo(struct ir3_ibo_mapping *mapping, unsigned image)
{
if (mapping->image_to_ibo[image] == IBO_INVALID) {
unsigned ibo = mapping->num_ibo++;
mapping->image_to_ibo[image] = ibo;
mapping->ibo_to_image[ibo] = image;
}
return mapping->image_to_ibo[image];
}
unsigned
ir3_image_to_tex(struct ir3_ibo_mapping *mapping, unsigned image)
{
if (mapping->image_to_tex[image] == IBO_INVALID) {
unsigned tex = mapping->num_tex++;
mapping->image_to_tex[image] = tex;
mapping->tex_to_image[tex] = image;
}
return mapping->image_to_tex[image] + mapping->tex_base;
}
/* Helper to parse the deref for an image to get image slot. This should be
* mapped to tex or ibo idx using ir3_image_to_tex() or ir3_image_to_ibo().
*/
unsigned
ir3_get_image_slot(nir_deref_instr *deref)
{
unsigned int loc = 0;
unsigned inner_size = 1;
while (deref->deref_type != nir_deref_type_var) {
assert(deref->deref_type == nir_deref_type_array);
unsigned const_index = nir_src_as_uint(deref->arr.index);
/* Go to the next instruction */
deref = nir_deref_instr_parent(deref);
assert(glsl_type_is_array(deref->type));
const unsigned array_len = glsl_get_length(deref->type);
loc += MIN2(const_index, array_len - 1) * inner_size;
/* Update the inner size */
inner_size *= array_len;
}
loc += deref->var->data.driver_location;
return loc;
}
/* see tex_info() for equiv logic for texture instructions.. it would be
* nice if this could be better unified..
*/
unsigned
ir3_get_image_coords(const nir_variable *var, unsigned *flagsp)
{
const struct glsl_type *type = glsl_without_array(var->type);
unsigned coords = glsl_get_sampler_coordinate_components(type);
unsigned flags = 0;
if (coords == 3)
flags |= IR3_INSTR_3D;
if (glsl_sampler_type_is_array(type))
flags |= IR3_INSTR_A;
if (flagsp)
*flagsp = flags;
return coords;
}
type_t
ir3_get_image_type(const nir_variable *var)
{
switch (glsl_get_sampler_result_type(glsl_without_array(var->type))) {
case GLSL_TYPE_UINT:
return TYPE_U32;
case GLSL_TYPE_INT:
return TYPE_S32;
case GLSL_TYPE_FLOAT:
return TYPE_F32;
default:
unreachable("bad sampler type.");
return 0;
}
}
/* Returns the number of components for the different image formats
* supported by the GLES 3.1 spec, plus those added by the
* GL_NV_image_formats extension.
*/
unsigned
ir3_get_num_components_for_glformat(GLuint format)
{
switch (format) {
case GL_R32F:
case GL_R32I:
case GL_R32UI:
case GL_R16F:
case GL_R16I:
case GL_R16UI:
case GL_R16:
case GL_R16_SNORM:
case GL_R8I:
case GL_R8UI:
case GL_R8:
case GL_R8_SNORM:
return 1;
case GL_RG32F:
case GL_RG32I:
case GL_RG32UI:
case GL_RG16F:
case GL_RG16I:
case GL_RG16UI:
case GL_RG16:
case GL_RG16_SNORM:
case GL_RG8I:
case GL_RG8UI:
case GL_RG8:
case GL_RG8_SNORM:
return 2;
case GL_R11F_G11F_B10F:
return 3;
case GL_RGBA32F:
case GL_RGBA32I:
case GL_RGBA32UI:
case GL_RGBA16F:
case GL_RGBA16I:
case GL_RGBA16UI:
case GL_RGBA16:
case GL_RGBA16_SNORM:
case GL_RGBA8I:
case GL_RGBA8UI:
case GL_RGBA8:
case GL_RGBA8_SNORM:
case GL_RGB10_A2UI:
case GL_RGB10_A2:
return 4;
case GL_NONE:
/* Omitting the image format qualifier is allowed on desktop GL
* profiles. Assuming 4 components is always safe.
*/
return 4;
default:
/* Return 4 components also for all other formats we don't know
* about. The format should have been validated already by
* the higher level API, but drop a debug message just in case.
*/
debug_printf("Unhandled GL format %u while emitting imageStore()\n",
format);
return 4;
}
}
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