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Graphics: Switch glyph atlases to R8 instead of A8

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A8 can't be supported efficiently on API lacking texture swizzle support (DX, WebGL, WebGPU), so we swizzle in the shader instead
This commit is contained in:
SirLynix
2023-02-22 19:11:41 +01:00
parent b38f9dc79b
commit 5833ce573d
10 changed files with 46 additions and 13 deletions
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2
include/Nazara/OpenGLRenderer/Utils.hpp
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@@ -26,6 +26,8 @@ namespace Nz
GLenum swizzleG;
GLenum swizzleB;
GLenum swizzleA;
inline bool HasSwizzle() const;
};
inline std::optional<GLTextureFormat> DescribeTextureFormat(PixelFormat pixelFormat);

15
include/Nazara/OpenGLRenderer/Utils.inl
View File

@@ -10,14 +10,19 @@
namespace Nz
{
inline bool GLTextureFormat::HasSwizzle() const
{
return swizzleR != GL_RED || swizzleG != GL_GREEN || swizzleB != GL_BLUE || swizzleA != GL_ALPHA;
}
inline std::optional<GLTextureFormat> DescribeTextureFormat(PixelFormat pixelFormat)
{
// TODO: Fill this switch
switch (pixelFormat)
{
case PixelFormat::A8: return GLTextureFormat{ GL_R8, GL_RED, GL_UNSIGNED_BYTE, GL_ONE, GL_ONE, GL_ONE, GL_RED };
case PixelFormat::BGR8: return GLTextureFormat{ GL_RGB8, GL_RGB, GL_UNSIGNED_BYTE, GL_BLUE, GL_GREEN, GL_RED, GL_ONE };
case PixelFormat::BGR8_SRGB: return GLTextureFormat{ GL_SRGB8, GL_RGB, GL_UNSIGNED_BYTE, GL_BLUE, GL_GREEN, GL_RED, GL_ONE };
case PixelFormat::BGR8: return GLTextureFormat{ GL_RGB8, GL_RGB, GL_UNSIGNED_BYTE, GL_BLUE, GL_GREEN, GL_RED, GL_ALPHA };
case PixelFormat::BGR8_SRGB: return GLTextureFormat{ GL_SRGB8, GL_RGB, GL_UNSIGNED_BYTE, GL_BLUE, GL_GREEN, GL_RED, GL_ALPHA };
case PixelFormat::BGRA8: return GLTextureFormat{ GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_BYTE, GL_BLUE, GL_GREEN, GL_RED, GL_ALPHA };
case PixelFormat::BGRA8_SRGB: return GLTextureFormat{ GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_BYTE, GL_BLUE, GL_GREEN, GL_RED, GL_ALPHA };
case PixelFormat::Depth16: return GLTextureFormat{ GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT, GL_RED, GL_ZERO, GL_ZERO, GL_ZERO };
@@ -27,8 +32,10 @@ namespace Nz
case PixelFormat::Depth32FStencil8: return GLTextureFormat{ GL_DEPTH32F_STENCIL8, GL_DEPTH_STENCIL, GL_FLOAT_32_UNSIGNED_INT_24_8_REV, GL_RED, GL_GREEN, GL_ZERO, GL_ZERO };
case PixelFormat::L8: return GLTextureFormat{ GL_R8, GL_RED, GL_UNSIGNED_BYTE, GL_RED, GL_RED, GL_RED, GL_ONE };
case PixelFormat::LA8: return GLTextureFormat{ GL_RG8, GL_RG, GL_UNSIGNED_BYTE, GL_RED, GL_RED, GL_RED, GL_GREEN };
case PixelFormat::RGB8: return GLTextureFormat{ GL_RGB8, GL_RGB, GL_UNSIGNED_BYTE, GL_RED, GL_GREEN, GL_BLUE, GL_ONE };
case PixelFormat::RGB8_SRGB: return GLTextureFormat{ GL_SRGB8, GL_RGB, GL_UNSIGNED_BYTE, GL_RED, GL_GREEN, GL_BLUE, GL_ONE };
case PixelFormat::R8: return GLTextureFormat{ GL_R8, GL_RED, GL_UNSIGNED_BYTE, GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA };
case PixelFormat::RG8: return GLTextureFormat{ GL_RG8, GL_RG, GL_UNSIGNED_BYTE, GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA };
case PixelFormat::RGB8: return GLTextureFormat{ GL_RGB8, GL_RGB, GL_UNSIGNED_BYTE, GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA };
case PixelFormat::RGB8_SRGB: return GLTextureFormat{ GL_SRGB8, GL_RGB, GL_UNSIGNED_BYTE, GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA };
case PixelFormat::RGBA8: return GLTextureFormat{ GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE, GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA };
case PixelFormat::RGBA8_SRGB: return GLTextureFormat{ GL_SRGB8_ALPHA8, GL_RGBA, GL_UNSIGNED_BYTE, GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA };
case PixelFormat::RGBA16F: return GLTextureFormat{ GL_RGBA16F, GL_RGBA, GL_FLOAT, GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA };