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Graphics/TextureLoader: Add support for alpha-test and alpha-blending

This commit is contained in:
SirLynix 2022-11-05 00:29:25 +01:00
parent fe0d70d9e1
commit 04a8b03cf3
1 changed files with 39 additions and 4 deletions
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43
src/Nazara/Graphics/Formats/TextureLoader.cpp
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@ -5,6 +5,7 @@
#include <Nazara/Graphics/Formats/TextureLoader.hpp>
#include <Nazara/Graphics/Graphics.hpp>
#include <Nazara/Renderer/Texture.hpp>
#include <Nazara/Utility/Image.hpp>
#include <Nazara/Utility/Utility.hpp>
#include <Nazara/Graphics/Debug.hpp>
@ -24,12 +25,27 @@ namespace Nz
{
TextureParams texParams;
texParams.renderDevice = Graphics::Instance()->GetRenderDevice();
// TODO: Set format as sRGB
std::shared_ptr<Texture> texture = Texture::LoadFromStream(stream, texParams);
if (!texture)
std::shared_ptr<Image> image = Image::LoadFromStream(stream, texParams);
if (!image)
return Err(ResourceLoadingError::Unrecognized);
bool hasAlphaTest = parameters.custom.GetBooleanParameter("EnableAlphaTest").GetValueOr(false);
std::shared_ptr<Texture> texture = Texture::CreateFromImage(*image, texParams);
if (!texture)
return Err(ResourceLoadingError::Internal);
bool enableAlphaTest = parameters.custom.GetBooleanParameter("EnableAlphaTest").GetValueOr(false);
bool enableAlphaBlending = parameters.custom.GetBooleanParameter("EnableAlphaBlending").GetValueOr(false);
bool hasAlpha;
if (enableAlphaTest || enableAlphaBlending)
hasAlpha = image->HasAlpha();
else
hasAlpha = false;
// Delete image to free memory
image.reset();
std::shared_ptr<MaterialInstance> materialInstance;
switch (parameters.lightingType)
@ -49,9 +65,28 @@ namespace Nz
if (!materialInstance)
materialInstance = Graphics::Instance()->GetDefaultMaterials().basicMaterial->Instantiate();
if (hasAlphaTest && PixelFormatInfo::HasAlpha(texture->GetFormat()))
if (enableAlphaTest && hasAlpha)
materialInstance->SetValueProperty("AlphaTest", true);
if (enableAlphaBlending && hasAlpha)
{
materialInstance->DisablePass("DepthPass");
materialInstance->UpdatePassStates("ForwardPass", [](RenderStates& renderStates)
{
renderStates.depthBuffer = true;
renderStates.depthWrite = false;
renderStates.blending = true;
renderStates.blend.modeColor = BlendEquation::Add;
renderStates.blend.modeAlpha = BlendEquation::Add;
renderStates.blend.srcColor = BlendFunc::SrcAlpha;
renderStates.blend.dstColor = BlendFunc::InvSrcAlpha;
renderStates.blend.srcAlpha = BlendFunc::One;
renderStates.blend.dstAlpha = BlendFunc::One;
return true;
});
}
materialInstance->SetTextureProperty("BaseColorMap", std::move(texture));
return materialInstance;