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vo_gpu: pre-multiply alpha when dealing with background colors

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This was simply wrong for who knows how long.
This commit is contained in:
Dudemanguy 2024-02-16 19:23:22 -06:00
parent c72c47204d
commit 183f63c8c9
1 changed files with 4 additions and 0 deletions
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4
video/out/gpu/video.c
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@ -3091,6 +3091,7 @@ static void pass_draw_to_screen(struct gl_video *p, const struct ra_fbo *fbo, in
GLSLF("vec4 background = vec4(%f, %f, %f, %f);\n", GLSLF("vec4 background = vec4(%f, %f, %f, %f);\n",
c.r / 255.0, c.g / 255.0, c.b / 255.0, c.a / 255.0); c.r / 255.0, c.g / 255.0, c.b / 255.0, c.a / 255.0);
GLSL(color += background * (1.0 - color.a);) GLSL(color += background * (1.0 - color.a);)
GLSL(color.rgb *= vec3(color.a););
} }
} }
@ -3314,6 +3315,9 @@ void gl_video_render_frame(struct gl_video *p, struct vo_frame *frame,
struct m_color c = p->clear_color; struct m_color c = p->clear_color;
float clear_color[4] = {c.r / 255.0, c.g / 255.0, c.b / 255.0, c.a / 255.0}; float clear_color[4] = {c.r / 255.0, c.g / 255.0, c.b / 255.0, c.a / 255.0};
clear_color[0] *= clear_color[3];
clear_color[1] *= clear_color[3];
clear_color[2] *= clear_color[3];
p->ra->fns->clear(p->ra, fbo->tex, clear_color, &target_rc); p->ra->fns->clear(p->ra, fbo->tex, clear_color, &target_rc);
if (p->hwdec_overlay) { if (p->hwdec_overlay) {