piwalker/dolphin
1
0
Fork 0
mirror of https://github.com/dolphin-emu/dolphin.git synced 2024-11-15 05:47:56 -07:00
Code Issues Actions Packages Projects Releases Wiki Activity

Merge pull request #4935 from Armada651/depth-range-fix

Browse Source 
VideoBackends: Set the maximum range when the depth range is oversized.
This commit is contained in:
Markus Wick 2017-03-10 18:05:52 +01:00 committed by GitHub
commit e99cd57eb3
21 changed files with 181 additions and 77 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Source/Core/Common/Common.vcxproj
View File

@ -109,6 +109,7 @@
<ClInclude Include="GL\GLExtensions\gl_common.h" />
<ClInclude Include="GL\GLExtensions\HP_occlusion_test.h" />
<ClInclude Include="GL\GLExtensions\KHR_debug.h" />
<ClInclude Include="GL\GLExtensions\NV_depth_buffer_float.h" />
<ClInclude Include="GL\GLExtensions\NV_occlusion_query_samples.h" />
<ClInclude Include="GL\GLExtensions\NV_primitive_restart.h" />
<ClInclude Include="GL\GLInterfaceBase.h" />

3
Source/Core/Common/Common.vcxproj.filters
View File

@ -226,6 +226,9 @@
<ClInclude Include="GL\GLExtensions\NV_primitive_restart.h">
<Filter>GL\GLExtensions</Filter>
</ClInclude>
<ClInclude Include="GL\GLExtensions\NV_depth_buffer_float.h">
<Filter>GL\GLExtensions</Filter>
</ClInclude>
<ClInclude Include="GL\GLInterface\WGL.h">
<Filter>GL\GLInterface</Filter>
</ClInclude>

23
Source/Core/Common/GL/GLExtensions/GLExtensions.cpp
View File

@ -984,6 +984,11 @@ PFNDOLCOPYIMAGESUBDATAPROC dolCopyImageSubData;
// ARB_shader_storage_buffer_object
PFNDOLSHADERSTORAGEBLOCKBINDINGPROC dolShaderStorageBlockBinding;
// NV_depth_buffer_float
PFNDOLDEPTHRANGEDNVPROC dolDepthRangedNV;
PFNDOLCLEARDEPTHDNVPROC dolClearDepthdNV;
PFNDOLDEPTHBOUNDSDNVPROC dolDepthBoundsdNV;
// Creates a GLFunc object that requires a feature
#define GLFUNC_REQUIRES(x, y) \
{ \
@ -1838,6 +1843,11 @@ const GLFunc gl_function_array[] = {
// ARB_shader_storage_buffer_object
GLFUNC_REQUIRES(glShaderStorageBlockBinding, "ARB_shader_storage_buffer_object !VERSION_4_3"),
// NV_depth_buffer_float
GLFUNC_REQUIRES(glDepthRangedNV, "GL_NV_depth_buffer_float"),
GLFUNC_REQUIRES(glClearDepthdNV, "GL_NV_depth_buffer_float"),
GLFUNC_REQUIRES(glDepthBoundsdNV, "GL_NV_depth_buffer_float"),
};
namespace GLExtensions
@ -2060,26 +2070,21 @@ static void InitExtensionList()
// Quite a lot of these had their names changed when merged in to core
// Disable the ones that have
std::string gl300exts[] = {
"GL_ARB_map_buffer_range",
"GL_ARB_map_buffer_range", "GL_ARB_color_buffer_float", "GL_ARB_texture_float",
"GL_ARB_half_float_pixel", "GL_ARB_framebuffer_object", "GL_ARB_texture_float",
"GL_ARB_vertex_array_object", "GL_NV_depth_buffer_float",
//"GL_EXT_texture_integer",
//"GL_EXT_gpu_shader4",
//"GL_APPLE_flush_buffer_range",
"GL_ARB_color_buffer_float",
//"GL_NV_depth_buffer_float",
"GL_ARB_texture_float",
//"GL_EXT_packed_float",
//"GL_EXT_texture_shared_exponent",
"GL_ARB_half_float_pixel",
//"GL_NV_half_float",
"GL_ARB_framebuffer_object",
//"GL_EXT_framebuffer_sRGB",
"GL_ARB_texture_float",
//"GL_EXT_texture_integer",
//"GL_EXT_draw_buffers2",
//"GL_EXT_texture_integer",
//"GL_EXT_texture_array",
//"GL_EXT_texture_compression_rgtc",
//"GL_EXT_transform_feedback",
"GL_ARB_vertex_array_object",
//"GL_NV_conditional_render",
"VERSION_3_0",
};

1
Source/Core/Common/GL/GLExtensions/GLExtensions.h
View File

@ -31,6 +31,7 @@
#include "Common/GL/GLExtensions/EXT_texture_filter_anisotropic.h"
#include "Common/GL/GLExtensions/HP_occlusion_test.h"
#include "Common/GL/GLExtensions/KHR_debug.h"
#include "Common/GL/GLExtensions/NV_depth_buffer_float.h"
#include "Common/GL/GLExtensions/NV_occlusion_query_samples.h"
#include "Common/GL/GLExtensions/NV_primitive_restart.h"
#include "Common/GL/GLExtensions/gl_1_1.h"

41
Source/Core/Common/GL/GLExtensions/NV_depth_buffer_float.h Normal file
View File

@ -0,0 +1,41 @@
/*
** Copyright (c) 2013-2015 The Khronos Group Inc.
**
** Permission is hereby granted, free of charge, to any person obtaining a
** copy of this software and/or associated documentation files (the
** "Materials"), to deal in the Materials without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Materials, and to
** permit persons to whom the Materials are furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be included
** in all copies or substantial portions of the Materials.
**
** THE MATERIALS ARE 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
** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
*/
#include "Common/GL/GLExtensions/gl_common.h"
#define GL_DEPTH_COMPONENT32F_NV 0x8DAB
#define GL_DEPTH32F_STENCIL8_NV 0x8DAC
#define GL_FLOAT_32_UNSIGNED_INT_24_8_REV_NV 0x8DAD
#define GL_DEPTH_BUFFER_FLOAT_MODE_NV 0x8DAF
typedef void(APIENTRYP PFNDOLDEPTHRANGEDNVPROC)(GLdouble zNear, GLdouble zFar);
typedef void(APIENTRYP PFNDOLCLEARDEPTHDNVPROC)(GLdouble depth);
typedef void(APIENTRYP PFNDOLDEPTHBOUNDSDNVPROC)(GLdouble zmin, GLdouble zmax);
extern PFNDOLDEPTHRANGEDNVPROC dolDepthRangedNV;
extern PFNDOLCLEARDEPTHDNVPROC dolClearDepthdNV;
extern PFNDOLDEPTHBOUNDSDNVPROC dolDepthBoundsdNV;
#define glDepthRangedNV dolDepthRangedNV
#define glClearDepthdNV dolClearDepthdNV
#define glDepthBoundsdNV dolDepthBoundsdNV

2
Source/Core/Core/Analytics.cpp
View File

@ -234,6 +234,8 @@ void DolphinAnalytics::MakePerGameBuilder()
builder.AddData("gpu-has-dual-source-blend", g_Config.backend_info.bSupportsDualSourceBlend);
builder.AddData("gpu-has-primitive-restart", g_Config.backend_info.bSupportsPrimitiveRestart);
builder.AddData("gpu-has-oversized-viewports", g_Config.backend_info.bSupportsOversizedViewports);
builder.AddData("gpu-has-oversized-depth-ranges",
g_Config.backend_info.bSupportsOversizedDepthRanges);
builder.AddData("gpu-has-geometry-shaders", g_Config.backend_info.bSupportsGeometryShaders);
builder.AddData("gpu-has-3d-vision", g_Config.backend_info.bSupports3DVision);
builder.AddData("gpu-has-early-z", g_Config.backend_info.bSupportsEarlyZ);

13
Source/Core/VideoBackends/D3D/Render.cpp
View File

@ -546,10 +546,8 @@ void Renderer::SetViewport()
float Y = Renderer::EFBToScaledYf(xfmem.viewport.yOrig + xfmem.viewport.ht - scissorYOff);
float Wd = Renderer::EFBToScaledXf(2.0f * xfmem.viewport.wd);
float Ht = Renderer::EFBToScaledYf(-2.0f * xfmem.viewport.ht);
float range = MathUtil::Clamp<float>(xfmem.viewport.zRange, 0.0f, 16777215.0f);
float min_depth =
MathUtil::Clamp<float>(xfmem.viewport.farZ - range, 0.0f, 16777215.0f) / 16777216.0f;
float max_depth = MathUtil::Clamp<float>(xfmem.viewport.farZ, 0.0f, 16777215.0f) / 16777216.0f;
float min_depth = (xfmem.viewport.farZ - xfmem.viewport.zRange) / 16777216.0f;
float max_depth = xfmem.viewport.farZ / 16777216.0f;
if (Wd < 0.0f)
{
X += Wd;
@ -561,10 +559,11 @@ void Renderer::SetViewport()
Ht = -Ht;
}
// If an inverted depth range is used, which D3D doesn't support,
// we need to calculate the depth range in the vertex shader.
if (xfmem.viewport.zRange < 0.0f)
// If an inverted or oversized depth range is used, we need to calculate the depth range in the
// vertex shader.
if (UseVertexDepthRange())
{
// We need to ensure depth values are clamped the maximum value supported by the console GPU.
min_depth = 0.0f;
max_depth = GX_MAX_DEPTH;
}

1
Source/Core/VideoBackends/D3D/main.cpp
View File

@ -66,6 +66,7 @@ void VideoBackend::InitBackendInfo()
g_Config.backend_info.bSupportsDualSourceBlend = true;
g_Config.backend_info.bSupportsPrimitiveRestart = true;
g_Config.backend_info.bSupportsOversizedViewports = false;
g_Config.backend_info.bSupportsOversizedDepthRanges = false;
g_Config.backend_info.bSupportsGeometryShaders = true;
g_Config.backend_info.bSupports3DVision = true;
g_Config.backend_info.bSupportsPostProcessing = false;

13
Source/Core/VideoBackends/D3D12/Render.cpp
View File

@ -454,10 +454,8 @@ void Renderer::SetViewport()
float y = Renderer::EFBToScaledYf(xfmem.viewport.yOrig + xfmem.viewport.ht - scissor_y_offset);
float width = Renderer::EFBToScaledXf(2.0f * xfmem.viewport.wd);
float height = Renderer::EFBToScaledYf(-2.0f * xfmem.viewport.ht);
float range = MathUtil::Clamp<float>(xfmem.viewport.zRange, 0.0f, 16777215.0f);
float min_depth =
MathUtil::Clamp<float>(xfmem.viewport.farZ - range, 0.0f, 16777215.0f) / 16777216.0f;
float max_depth = MathUtil::Clamp<float>(xfmem.viewport.farZ, 0.0f, 16777215.0f) / 16777216.0f;
float min_depth = (xfmem.viewport.farZ - xfmem.viewport.zRange) / 16777216.0f;
float max_depth = xfmem.viewport.farZ / 16777216.0f;
if (width < 0.0f)
{
x += width;
@ -469,10 +467,11 @@ void Renderer::SetViewport()
height = -height;
}
// If an inverted depth range is used, which D3D doesn't support,
// we need to calculate the depth range in the vertex shader.
if (xfmem.viewport.zRange < 0.0f)
// If an inverted or oversized depth range is used, we need to calculate the depth range in the
// vertex shader.
if (UseVertexDepthRange())
{
// We need to ensure depth values are clamped the maximum value supported by the console GPU.
min_depth = 0.0f;
max_depth = GX_MAX_DEPTH;
}

1
Source/Core/VideoBackends/D3D12/main.cpp
View File

@ -69,6 +69,7 @@ void VideoBackend::InitBackendInfo()
g_Config.backend_info.bSupportsDualSourceBlend = true;
g_Config.backend_info.bSupportsPrimitiveRestart = true;
g_Config.backend_info.bSupportsOversizedViewports = false;
g_Config.backend_info.bSupportsOversizedDepthRanges = false;
g_Config.backend_info.bSupportsGeometryShaders = true;
g_Config.backend_info.bSupports3DVision = true;
g_Config.backend_info.bSupportsPostProcessing = false;

1
Source/Core/VideoBackends/Null/NullBackend.cpp
View File

@ -29,6 +29,7 @@ void VideoBackend::InitBackendInfo()
g_Config.backend_info.bSupportsDualSourceBlend = true;
g_Config.backend_info.bSupportsPrimitiveRestart = true;
g_Config.backend_info.bSupportsOversizedViewports = true;
g_Config.backend_info.bSupportsOversizedDepthRanges = false;
g_Config.backend_info.bSupportsGeometryShaders = true;
g_Config.backend_info.bSupports3DVision = false;
g_Config.backend_info.bSupportsEarlyZ = true;

46
Source/Core/VideoBackends/OGL/Render.cpp
View File

@ -437,6 +437,8 @@ Renderer::Renderer()
// Clip distance support is useless without a method to clamp the depth range
g_Config.backend_info.bSupportsDepthClamp = GLExtensions::Supports("GL_ARB_depth_clamp");
g_Config.backend_info.bSupportsOversizedDepthRanges =
GLExtensions::Supports("GL_NV_depth_buffer_float");
g_ogl_config.bSupportsGLSLCache = GLExtensions::Supports("GL_ARB_get_program_binary");
g_ogl_config.bSupportsGLPinnedMemory = GLExtensions::Supports("GL_AMD_pinned_memory");
@ -625,7 +627,7 @@ Renderer::Renderer()
g_ogl_config.gl_renderer, g_ogl_config.gl_version),
5000);
WARN_LOG(VIDEO, "Missing OGL Extensions: %s%s%s%s%s%s%s%s%s%s%s%s%s%s",
WARN_LOG(VIDEO, "Missing OGL Extensions: %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
g_ActiveConfig.backend_info.bSupportsDualSourceBlend ? "" : "DualSourceBlend ",
g_ActiveConfig.backend_info.bSupportsPrimitiveRestart ? "" : "PrimitiveRestart ",
g_ActiveConfig.backend_info.bSupportsEarlyZ ? "" : "EarlyZ ",
@ -638,7 +640,8 @@ Renderer::Renderer()
g_ActiveConfig.backend_info.bSupportsGSInstancing ? "" : "GSInstancing ",
g_ActiveConfig.backend_info.bSupportsClipControl ? "" : "ClipControl ",
g_ogl_config.bSupportsCopySubImage ? "" : "CopyImageSubData ",
g_ActiveConfig.backend_info.bSupportsDepthClamp ? "" : "DepthClamp ");
g_ActiveConfig.backend_info.bSupportsDepthClamp ? "" : "DepthClamp ",
g_ActiveConfig.backend_info.bSupportsOversizedDepthRanges ? "" : "DepthRangedNV ");
s_last_multisamples = g_ActiveConfig.iMultisamples;
s_MSAASamples = s_last_multisamples;
@ -1052,10 +1055,8 @@ void Renderer::SetViewport()
(float)scissorYOff);
float Width = EFBToScaledXf(2.0f * xfmem.viewport.wd);
float Height = EFBToScaledYf(-2.0f * xfmem.viewport.ht);
float range = MathUtil::Clamp<float>(xfmem.viewport.zRange, -16777215.0f, 16777215.0f);
float min_depth =
MathUtil::Clamp<float>(xfmem.viewport.farZ - range, 0.0f, 16777215.0f) / 16777216.0f;
float max_depth = MathUtil::Clamp<float>(xfmem.viewport.farZ, 0.0f, 16777215.0f) / 16777216.0f;
float min_depth = (xfmem.viewport.farZ - xfmem.viewport.zRange) / 16777216.0f;
float max_depth = xfmem.viewport.farZ / 16777216.0f;
if (Width < 0)
{
X += Width;
@ -1078,10 +1079,35 @@ void Renderer::SetViewport()
glViewport(iceilf(X), iceilf(Y), iceilf(Width), iceilf(Height));
}
// Set the reversed depth range. If we do depth clipping and depth range in the
// vertex shader we only need to ensure depth values don't exceed the maximum
// value supported by the console GPU. If not, we simply clamp the near/far values
// themselves to the maximum value as done above.
if (!g_ActiveConfig.backend_info.bSupportsOversizedDepthRanges &&
!g_ActiveConfig.backend_info.bSupportsDepthClamp)
{
// There's no way to support oversized depth ranges in this situation. Let's just clamp the
// range to the maximum value supported by the console GPU and hope for the best.
min_depth = MathUtil::Clamp(min_depth, 0.0f, GX_MAX_DEPTH);
max_depth = MathUtil::Clamp(max_depth, 0.0f, GX_MAX_DEPTH);
}
if (UseVertexDepthRange())
{
// We need to ensure depth values are clamped the maximum value supported by the console GPU.
// Taking into account whether the depth range is inverted or not.
if (xfmem.viewport.zRange < 0.0f)
{
min_depth = GX_MAX_DEPTH;
max_depth = 0.0f;
}
else
{
min_depth = 0.0f;
max_depth = GX_MAX_DEPTH;
}
}
// Set the reversed depth range.
if (g_ActiveConfig.backend_info.bSupportsOversizedDepthRanges)
glDepthRangedNV(max_depth, min_depth);
else
glDepthRangef(max_depth, min_depth);
}

1
Source/Core/VideoBackends/OGL/main.cpp
View File

@ -109,6 +109,7 @@ void VideoBackend::InitBackendInfo()
g_Config.backend_info.bSupportsInternalResolutionFrameDumps = true;
// Overwritten in Render.cpp later
g_Config.backend_info.bSupportsOversizedDepthRanges = false;
g_Config.backend_info.bSupportsDualSourceBlend = true;
g_Config.backend_info.bSupportsPrimitiveRestart = true;
g_Config.backend_info.bSupportsPaletteConversion = true;

1
Source/Core/VideoBackends/Software/SWmain.cpp
View File

@ -129,6 +129,7 @@ void VideoSoftware::InitBackendInfo()
g_Config.backend_info.bSupportsDualSourceBlend = true;
g_Config.backend_info.bSupportsEarlyZ = true;
g_Config.backend_info.bSupportsOversizedViewports = true;
g_Config.backend_info.bSupportsOversizedDepthRanges = true;
g_Config.backend_info.bSupportsPrimitiveRestart = false;
g_Config.backend_info.bSupportsMultithreading = false;
g_Config.backend_info.bSupportsInternalResolutionFrameDumps = false;

15
Source/Core/VideoBackends/Vulkan/Renderer.cpp
View File

@ -1628,10 +1628,8 @@ void Renderer::SetViewport()
float y = Renderer::EFBToScaledYf(xfmem.viewport.yOrig + xfmem.viewport.ht - scissor_y_offset);
float width = Renderer::EFBToScaledXf(2.0f * xfmem.viewport.wd);
float height = Renderer::EFBToScaledYf(-2.0f * xfmem.viewport.ht);
float range = MathUtil::Clamp<float>(xfmem.viewport.zRange, -16777215.0f, 16777215.0f);
float min_depth =
MathUtil::Clamp<float>(xfmem.viewport.farZ - range, 0.0f, 16777215.0f) / 16777216.0f;
float max_depth = MathUtil::Clamp<float>(xfmem.viewport.farZ, 0.0f, 16777215.0f) / 16777216.0f;
float min_depth = (xfmem.viewport.farZ - xfmem.viewport.zRange) / 16777216.0f;
float max_depth = xfmem.viewport.farZ / 16777216.0f;
if (width < 0.0f)
{
x += width;
@ -1643,11 +1641,12 @@ void Renderer::SetViewport()
height = -height;
}
// If an inverted depth range is used, which the Vulkan drivers don't
// support, we need to calculate the depth range in the vertex shader.
// TODO: Make this into a DriverDetails bug and write a test for CTS.
if (xfmem.viewport.zRange < 0.0f)
// If an oversized or inverted depth range is used, we need to calculate the depth range in the
// vertex shader.
// TODO: Inverted depth ranges are bugged in all drivers, which should be added to DriverDetails.
if (UseVertexDepthRange())
{
// We need to ensure depth values are clamped the maximum value supported by the console GPU.
min_depth = 0.0f;
max_depth = GX_MAX_DEPTH;
}

1
Source/Core/VideoBackends/Vulkan/VulkanContext.cpp
View File

@ -228,6 +228,7 @@ void VulkanContext::PopulateBackendInfo(VideoConfig* config)
config->backend_info.bSupportsExclusiveFullscreen = false; // Currently WSI does not allow this.
config->backend_info.bSupports3DVision = false; // D3D-exclusive.
config->backend_info.bSupportsOversizedViewports = true; // Assumed support.
config->backend_info.bSupportsOversizedDepthRanges = false; // No support yet.
config->backend_info.bSupportsEarlyZ = true; // Assumed support.
config->backend_info.bSupportsPrimitiveRestart = true; // Assumed support.
config->backend_info.bSupportsBindingLayout = false; // Assumed support.

2
Source/Core/VideoCommon/BPStructs.cpp
View File

@ -332,6 +332,8 @@ static void BPWritten(const BPCmd& bp)
{
if (bp.changes & 3)
PixelShaderManager::SetZTextureTypeChanged();
if (bp.changes & 12)
VertexShaderManager::SetViewportChanged();
#if defined(_DEBUG) || defined(DEBUGFAST)
const char* pzop[] = {"DISABLE", "ADD", "REPLACE", "?"};
const char* pztype[] = {"Z8", "Z16", "Z24", "?"};

29
Source/Core/VideoCommon/RenderBase.cpp
View File

@ -926,3 +926,32 @@ void Renderer::DumpFrameToImage(const FrameDumpConfig& config)
TextureToPng(config.data, config.stride, filename, config.width, config.height, false);
m_frame_dump_image_counter++;
}
bool Renderer::UseVertexDepthRange() const
{
// We can't compute the depth range in the vertex shader if we don't support depth clamp.
if (!g_ActiveConfig.backend_info.bSupportsDepthClamp)
return false;
const bool ztexture_enabled = bpmem.ztex2.type != ZTEXTURE_DISABLE && !bpmem.zcontrol.early_ztest;
if (g_ActiveConfig.backend_info.bSupportsOversizedDepthRanges)
{
// We support oversized depth ranges, but we need a full depth range if a ztexture is used.
return ztexture_enabled;
}
else
{
// We need a full depth range if a ztexture is used.
if (ztexture_enabled)
return true;
// If an inverted depth range is unsupported, we also need to check if the range is inverted.
if (!g_ActiveConfig.backend_info.bSupportsReversedDepthRange && xfmem.viewport.zRange < 0.0f)
return true;
// If an oversized depth range or a ztexture is used, we need to calculate the depth range
// in the vertex shader.
return fabs(xfmem.viewport.zRange) > 16777215.0f || fabs(xfmem.viewport.farZ) > 16777215.0f;
}
}

2
Source/Core/VideoCommon/RenderBase.h
View File

@ -140,6 +140,8 @@ public:
// Final surface changing
// This is called when the surface is resized (WX) or the window changes (Android).
virtual void ChangeSurface(void* new_surface_handle) {}
bool UseVertexDepthRange() const;
protected:
void CalculateTargetScale(int x, int y, int* scaledX, int* scaledY);
bool CalculateTargetSize();

24
Source/Core/VideoCommon/VertexShaderManager.cpp
View File

@ -391,41 +391,29 @@ void VertexShaderManager::SetConstants()
constants.pixelcentercorrection[2] = 1.0f;
constants.pixelcentercorrection[3] = 0.0f;
if (g_ActiveConfig.backend_info.bSupportsDepthClamp)
if (g_renderer->UseVertexDepthRange())
{
// Oversized depth ranges are handled in the vertex shader. We need to reverse
// the far value to get a reversed depth range mapping. This is necessary
// because the standard depth range equation pushes all depth values towards
// the back of the depth buffer where conventionally depth buffers have the
// least precision.
// the far value to use the reversed-Z trick.
if (g_ActiveConfig.backend_info.bSupportsReversedDepthRange)
{
if (fabs(xfmem.viewport.zRange) > 16777215.0f || fabs(xfmem.viewport.farZ) > 16777215.0f)
{
// For backends that support reversing the depth range we also support cases
// where the console also uses reversed depth with the same accuracy. We need
// to make sure the depth range is positive here and then reverse the depth in
// the backend viewport.
// Sometimes the console also tries to use the reversed-Z trick. We can only do
// that with the expected accuracy if the backend can reverse the depth range.
constants.pixelcentercorrection[2] = fabs(xfmem.viewport.zRange) / 16777215.0f;
if (xfmem.viewport.zRange < 0.0f)
constants.pixelcentercorrection[3] = xfmem.viewport.farZ / 16777215.0f;
else
constants.pixelcentercorrection[3] = 1.0f - xfmem.viewport.farZ / 16777215.0f;
}
}
else
{
if (xfmem.viewport.zRange < 0.0f || xfmem.viewport.zRange > 16777215.0f ||
fabs(xfmem.viewport.farZ) > 16777215.0f)
{
// For backends that don't support reversing the depth range we can still render
// cases where the console uses reversed depth correctly. But we simply can't
// provide the same accuracy as the console.
// cases where the console uses the reversed-Z trick. But we simply can't provide
// the expected accuracy, which might result in z-fighting.
constants.pixelcentercorrection[2] = xfmem.viewport.zRange / 16777215.0f;
constants.pixelcentercorrection[3] = 1.0f - xfmem.viewport.farZ / 16777215.0f;
}
}
}
dirty = true;
// This is so implementation-dependent that we can't have it here.

1
Source/Core/VideoCommon/VideoConfig.h
View File

@ -179,6 +179,7 @@ struct VideoConfig final
bool bSupportsDualSourceBlend;
bool bSupportsPrimitiveRestart;
bool bSupportsOversizedViewports;
bool bSupportsOversizedDepthRanges;
bool bSupportsGeometryShaders;
bool bSupports3DVision;
bool bSupportsEarlyZ; // needed by PixelShaderGen, so must stay in VideoCommon