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vo_opengl: add output_size uniform to custom shader
logically, scaler should know its input and output size Signed-off-by: wm4 <wm4@nowhere>
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@ -629,6 +629,9 @@ Available video output drivers are:
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never resets (regardless of seeks).
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vec2 image_size
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The size in pixels of the input image.
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vec2 target_size
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The size in pixels of the visible part of the scaled (and possibly
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cropped) image.
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For example, a shader that inverts the colors could look like this::
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@ -1239,6 +1239,9 @@ static void load_shader(struct gl_video *p, struct bstr body)
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gl_sc_uniform_f(p->sc, "frame", p->frames_uploaded);
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gl_sc_uniform_vec2(p->sc, "image_size", (GLfloat[]){p->image_params.w,
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p->image_params.h});
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gl_sc_uniform_vec2(p->sc, "target_size",
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(GLfloat[]){p->dst_rect.x1 - p->dst_rect.x0,
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p->dst_rect.y1 - p->dst_rect.y0});
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}
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static const char *get_custom_shader_fn(struct gl_video *p, const char *body)
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