Add R32UI, RG32UI, RGBA32UI texture format

Order indepenedent transparency uses 32-bit integer image formats.

Task-number: QTBUG-125121
Change-Id: I54a43c3c754b59bb3cab7107fdc6adf8a2d27b8a
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

src/gui/rhi/qrhi.cpp

@@ -4507,6 +4507,9 @@ bool QRhiRenderBuffer::createFrom(NativeRenderBuffer src)
     \value ASTC_12x12
 
     \value R8UI One component, unsigned 8 bit.
+    \value R32UI One component, unsigned 32 bit.
+    \value RG32UI Two component, unsigned 32 bit.
+    \value RGBA32UI Four component, unsigned 32 bit.
  */
 
 /*!
@@ -8559,6 +8562,15 @@ void QRhiImplementation::textureFormatInfo(QRhiTexture::Format format, const QSi
     case QRhiTexture::R8UI:
         bpc = 1;
         break;
+    case QRhiTexture::R32UI:
+        bpc = 4;
+        break;
+    case QRhiTexture::RG32UI:
+        bpc = 8;
+        break;
+    case QRhiTexture::RGBA32UI:
+        bpc = 16;
+        break;
 
     default:
         Q_UNREACHABLE();

src/gui/rhi/qrhi.h

@@ -938,6 +938,9 @@ public:
         RGB10A2,
 
         R8UI,
+        R32UI,
+        RG32UI,
+        RGBA32UI,
 
         D16,
         D24,

src/gui/rhi/qrhid3d11.cpp

@@ -1604,6 +1604,13 @@ static inline DXGI_FORMAT toD3DTextureFormat(QRhiTexture::Format format, QRhiTex
     case QRhiTexture::RGB10A2:
         return DXGI_FORMAT_R10G10B10A2_UNORM;
 
+    case QRhiTexture::R32UI:
+        return DXGI_FORMAT_R32_UINT;
+    case QRhiTexture::RG32UI:
+        return DXGI_FORMAT_R32G32_UINT;
+    case QRhiTexture::RGBA32UI:
+        return DXGI_FORMAT_R32G32B32A32_UINT;
+
     case QRhiTexture::D16:
         return DXGI_FORMAT_R16_TYPELESS;
     case QRhiTexture::D24:

src/gui/rhi/qrhid3d12.cpp

@@ -4034,6 +4034,13 @@ static inline DXGI_FORMAT toD3DTextureFormat(QRhiTexture::Format format, QRhiTex
     case QRhiTexture::RGB10A2:
         return DXGI_FORMAT_R10G10B10A2_UNORM;
 
+    case QRhiTexture::R32UI:
+        return DXGI_FORMAT_R32_UINT;
+    case QRhiTexture::RG32UI:
+        return DXGI_FORMAT_R32G32_UINT;
+    case QRhiTexture::RGBA32UI:
+        return DXGI_FORMAT_R32G32B32A32_UINT;
+
     case QRhiTexture::D16:
         return DXGI_FORMAT_R16_TYPELESS;
     case QRhiTexture::D24:

src/gui/rhi/qrhigles2.cpp

@@ -166,6 +166,18 @@ QT_BEGIN_NAMESPACE
 #define GL_R8UI                           0x8232
 #endif
 
+#ifndef GL_R32UI
+#define GL_R32UI                          0x8236
+#endif
+
+#ifndef GL_RG32UI
+#define GL_RG32UI                         0x823C
+#endif
+
+#ifndef GL_RGBA32UI
+#define GL_RGBA32UI                       0x8D70
+#endif
+
 #ifndef GL_RG8
 #define GL_RG8                            0x822B
 #endif
@@ -900,6 +912,12 @@ bool QRhiGles2::create(QRhi::Flags flags)
     caps.bgraExternalFormat = f->hasOpenGLExtension(QOpenGLExtensions::BGRATextureFormat);
     caps.bgraInternalFormat = caps.bgraExternalFormat && caps.gles;
     caps.r8Format = f->hasOpenGLFeature(QOpenGLFunctions::TextureRGFormats);
+
+    if (caps.gles)
+        caps.r32uiFormat = (caps.ctxMajor > 3 || (caps.ctxMajor == 3 && caps.ctxMinor >= 1)) && caps.r8Format; // ES 3.1
+    else
+        caps.r32uiFormat = true;
+
     caps.r16Format = f->hasOpenGLExtension(QOpenGLExtensions::Sized16Formats);
     caps.floatFormats = caps.ctxMajor >= 3; // 3.0 or ES 3.0
     caps.rgb10Formats = caps.ctxMajor >= 3; // 3.0 or ES 3.0
@@ -1327,6 +1345,24 @@ static inline void toGlTextureFormat(QRhiTexture::Format format, const QRhiGles2
         *glformat = GL_RGBA;
         *gltype = GL_UNSIGNED_INT_2_10_10_10_REV;
         break;
+    case QRhiTexture::R32UI:
+        *glintformat = GL_R32UI;
+        *glsizedintformat = *glintformat;
+        *glformat = GL_RGBA;
+        *gltype = GL_UNSIGNED_INT;
+        break;
+    case QRhiTexture::RG32UI:
+        *glintformat = GL_RG32UI;
+        *glsizedintformat = *glintformat;
+        *glformat = GL_RGBA;
+        *gltype = GL_UNSIGNED_INT;
+        break;
+    case QRhiTexture::RGBA32UI:
+        *glintformat = GL_RGBA32UI;
+        *glsizedintformat = *glintformat;
+        *glformat = GL_RGBA;
+        *gltype = GL_UNSIGNED_INT;
+        break;
     case QRhiTexture::D16:
         *glintformat = GL_DEPTH_COMPONENT16;
         *glsizedintformat = *glintformat;
@@ -1391,6 +1427,11 @@ bool QRhiGles2::isTextureFormatSupported(QRhiTexture::Format format, QRhiTexture
     case QRhiTexture::R8UI:
         return caps.r8Format;
 
+    case QRhiTexture::R32UI:
+    case QRhiTexture::RG32UI:
+    case QRhiTexture::RGBA32UI:
+        return caps.r32uiFormat;
+
     case QRhiTexture::RG8:
         return caps.r8Format;
 

src/gui/rhi/qrhigles2_p.h

@@ -993,6 +993,7 @@ public:
               bgraInternalFormat(false),
               r8Format(false),
               r16Format(false),
+              r32uiFormat(false),
               floatFormats(false),
               rgb10Formats(false),
               depthTexture(false),
@@ -1053,6 +1054,7 @@ public:
         uint bgraInternalFormat : 1;
         uint r8Format : 1;
         uint r16Format : 1;
+        uint r32uiFormat : 1;
         uint floatFormats : 1;
         uint rgb10Formats : 1;
         uint depthTexture : 1;

src/gui/rhi/qrhimetal.mm

@@ -3492,6 +3492,13 @@ static inline MTLPixelFormat toMetalTextureFormat(QRhiTexture::Format format, QR
     case QRhiTexture::RGB10A2:
         return MTLPixelFormatRGB10A2Unorm;
 
+    case QRhiTexture::R32UI:
+        return MTLPixelFormatR32Uint;
+    case QRhiTexture::RG32UI:
+        return MTLPixelFormatRG32Uint;
+    case QRhiTexture::RGBA32UI:
+        return MTLPixelFormatRGBA32Uint;
+
 #ifdef Q_OS_MACOS
     case QRhiTexture::D16:
         return MTLPixelFormatDepth16Unorm;

src/gui/rhi/qrhivulkan.cpp

@@ -1191,6 +1191,12 @@ static inline VkFormat toVkTextureFormat(QRhiTexture::Format format, QRhiTexture
 
     case QRhiTexture::R8UI:
         return VK_FORMAT_R8_UINT;
+    case QRhiTexture::R32UI:
+        return VK_FORMAT_R32_UINT;
+    case QRhiTexture::RG32UI:
+        return VK_FORMAT_R32G32_UINT;
+    case QRhiTexture::RGBA32UI:
+        return VK_FORMAT_R32G32B32A32_UINT;
 
     case QRhiTexture::D16:
         return VK_FORMAT_D16_UNORM;