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Backed out using pixel texture coordinates, it had weird visual side effects

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This commit is contained in:
Sam Lantinga
2017-12-09 19:48:38 -08:00
parent 8aad49238b
commit c2cc9c166c
4 changed files with 35 additions and 27 deletions
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18
src/render/metal/SDL_render_metal.m
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@@ -597,6 +597,14 @@ normy(const float _val, const float len)
return (((val - 0.5f) / len) * 2.0f) - 1.0f;
}
// normalize a value from 0.0f to len into 0.0f to 1.0f.
static inline float
normtex(const float _val, const float len)
{
const float val = (_val < 0.0f) ? 0.0f : (_val > len) ? len : _val;
return ((val + 0.5f) / len);
}
static int
DrawVerts(SDL_Renderer * renderer, const SDL_FPoint * points, int count,
const MTLPrimitiveType primtype)
@@ -700,11 +708,11 @@ METAL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
};
const float uv[] = {
srcrect->x, srcrect->y + srcrect->h,
srcrect->x, srcrect->y,
srcrect->x + srcrect->w, srcrect->y,
srcrect->x, srcrect->y + srcrect->h,
srcrect->x + srcrect->w, srcrect->y + srcrect->h
normtex(srcrect->x, texw), normtex(srcrect->y + srcrect->h, texh),
normtex(srcrect->x, texw), normtex(srcrect->y, texh),
normtex(srcrect->x + srcrect->w, texw), normtex(srcrect->y, texh),
normtex(srcrect->x, texw), normtex(srcrect->y + srcrect->h, texh),
normtex(srcrect->x + srcrect->w, texw), normtex(srcrect->y + srcrect->h, texh)
};
float color[4] = { 1.0f, 1.0f, 1.0f, 1.0f };