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Make shader clip space consistent across APIs and projection matrices.

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- All shaders are expected to output clip space values that are effectively y-up, with [-1, 1] z, in NDC.
- The transform to a backend's expected clip space values from the above range now happens after user vertex shader code is run, instead of inside a projection matrix.
- Projection matrices no longer need to be flipped when rendering to a canvas versus the main screen.

This means custom projection matrices might need to be altered to account for the more consistent range.
This commit is contained in:
Sasha Szpakowski
2024-03-23 22:00:02 -03:00
parent 698d305212
commit 7bfbd647ba
11 changed files with 93 additions and 68 deletions
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src/modules/graphics/metal/Graphics.h
-2
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@@ -64,8 +64,6 @@ public:
love::graphics::Texture *newTextureView(love::graphics::Texture *base, const Texture::ViewSettings &viewsettings) override;
love::graphics::Buffer *newBuffer(const Buffer::Settings &settings, const std::vector<Buffer::DataDeclaration> &format, const void *data, size_t size, size_t arraylength) override;
Matrix4 computeDeviceProjection(const Matrix4 &projection, bool rendertotexture) const override;
void backbufferChanged(int width, int height, int pixelwidth, int pixelheight, bool backbufferstencil, bool backbufferdepth, int msaa) override;
bool setMode(void *context, int width, int height, int pixelwidth, int pixelheight, bool backbufferstencil, bool backbufferdepth, int msaa) override;
void unSetMode() override;