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vkd3d-shader/ir: Implement exponential fog.

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This commit is contained in:
Elizabeth Figura
2024-11-13 19:39:35 -06:00
committed by Henri Verbeet
parent 1fbbc82f3a
commit d56601c8d0
Notes: Henri Verbeet 2024-12-02 17:19:05 +01:00 
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/1265
7 changed files with 142 additions and 11 deletions
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34
tests/shader_runner_vulkan.c
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@@ -30,6 +30,9 @@
#include "vulkan_utils.h"
#include "vkd3d_test.h"
#define LOG2_E 1.44269504f
#define SQRT_LOG2_E 1.20112241f
struct vulkan_resource
{
struct resource r;
@@ -274,6 +277,8 @@ static enum vkd3d_shader_fog_fragment_mode get_fog_fragment_mode(enum fog_mode m
case FOG_MODE_DISABLE: return VKD3D_SHADER_FOG_FRAGMENT_NONE;
case FOG_MODE_NONE: return VKD3D_SHADER_FOG_FRAGMENT_LINEAR;
case FOG_MODE_LINEAR: return VKD3D_SHADER_FOG_FRAGMENT_LINEAR;
case FOG_MODE_EXP: return VKD3D_SHADER_FOG_FRAGMENT_EXP;
case FOG_MODE_EXP2: return VKD3D_SHADER_FOG_FRAGMENT_EXP2;
default: fatal_error("Unhandled fog mode %#x.\n", mode);
}
}
@@ -510,15 +515,28 @@ static bool compile_d3d_code(struct vulkan_shader_runner *runner,
parameters[20].type = VKD3D_SHADER_PARAMETER_TYPE_IMMEDIATE_CONSTANT;
parameters[20].data_type = VKD3D_SHADER_PARAMETER_DATA_TYPE_FLOAT32;
if (runner->r.fog_mode == FOG_MODE_NONE)
switch (runner->r.fog_mode)
{
parameters[19].u.immediate_constant.u.f32 = 0.0f;
parameters[20].u.immediate_constant.u.f32 = -1.0f;
}
else
{
parameters[19].u.immediate_constant.u.f32 = runner->r.fog_end;
parameters[20].u.immediate_constant.u.f32 = 1.0 / (runner->r.fog_end - runner->r.fog_start);
case FOG_MODE_NONE:
parameters[19].u.immediate_constant.u.f32 = 0.0f;
parameters[20].u.immediate_constant.u.f32 = -1.0f;
break;
case FOG_MODE_LINEAR:
parameters[19].u.immediate_constant.u.f32 = runner->r.fog_end;
parameters[20].u.immediate_constant.u.f32 = 1.0 / (runner->r.fog_end - runner->r.fog_start);
break;
case FOG_MODE_EXP:
parameters[20].u.immediate_constant.u.f32 = runner->r.fog_density * LOG2_E;
break;
case FOG_MODE_EXP2:
parameters[20].u.immediate_constant.u.f32 = runner->r.fog_density * SQRT_LOG2_E;
break;
case FOG_MODE_DISABLE:
break;
}
parameters[21].name = VKD3D_SHADER_PARAMETER_NAME_FOG_SOURCE;