Scan-line + Image-Flip (image-adjustment.glsl)

[oneswitch]

I'd love to find a way to get the image-adjustment.glsl shader able to mirror a game screen (e.g. Space Invaders) and apply scan-lines. This to fit into a real Space Invaders machine with half-silvered mirror.

If I use 2 shaders and the scanline.glsl it's okay.

But I was really hoping to get something as nice as the crt-pi-vertical.glsl / crt-pi.glsl shaders working properly. However when you use these (with flipping) it doesn't work well. You get a a sickly pink scanline, instead of a black scanline.

[hizzlekizzle]

Have you tried putting the image-adjustment shader first?

[oneswitch]

Yes, good thought but doesn't fix it.

…

On Tue, 23 Apr 2019, 17:56 hizzlekizzle, ***@***.***> wrote: Have you tried putting the image-adjustment shader first? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#88 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ACMBL4PINQIWDN6RPNY73DTPR45UFANCNFSM4HHU4AEA> .

[hizzlekizzle]

Hmm, no problems here. Can you post a screenshot of what it's going wrong on your end and maybe a little more info on what you're wanting? Should it look like this?

[oneswitch]

You have it nearly perfect, although it should also be flipped horizontally...

I'm using a Rasberry Pi with RetroPie. If I use a single shader (crt-pi-vertical) it gives a nice scan-lines effect with black gaps as below...

... If I use the flipping shader....

..., no matter what order I put it in, I get no gaps, but a sickly pink effect.

[hizzlekizzle]

Does this do what you want? (the paths are set to work from your 'presets' directory; name it something ending in .glslp):

shaders = "2"
shader0 = "../misc/image-adjustment.glsl"
filter_linear0 = "false"
wrap_mode0 = "clamp_to_border"
mipmap_input0 = "false"
alias0 = ""
float_framebuffer0 = "true"
srgb_framebuffer0 = "false"
scale_type_x0 = "source"
scale_x0 = "1.000000"
scale_type_y0 = "source"
scale_y0 = "1.000000"
shader1 = "../crt/shaders/crt-pi.glsl"
filter_linear1 = "false"
wrap_mode1 = "clamp_to_border"
mipmap_input1 = "false"
alias1 = ""
float_framebuffer1 = "true"
srgb_framebuffer1 = "false"
parameters = "ia_target_gamma;ia_monitor_gamma;ia_overscan_percent_x;ia_overscan_percent_y;ia_saturation;ia_contrast;ia_luminance;ia_black_level;ia_bright_boost;ia_R;ia_G;ia_B;ia_ZOOM;ia_XPOS;ia_YPOS;ia_TOPMASK;ia_BOTMASK;ia_LMASK;ia_RMASK;ia_GRAIN_STR;ia_SHARPEN;ia_FLIP_HORZ;ia_FLIP_VERT;CURVATURE_X;CURVATURE_Y;MASK_BRIGHTNESS;SCANLINE_WEIGHT;SCANLINE_GAP_BRIGHTNESS;BLOOM_FACTOR;INPUT_GAMMA;OUTPUT_GAMMA"
ia_target_gamma = "2.200000"
ia_monitor_gamma = "2.200000"
ia_overscan_percent_x = "0.000000"
ia_overscan_percent_y = "0.000000"
ia_saturation = "1.000000"
ia_contrast = "1.000000"
ia_luminance = "1.000000"
ia_black_level = "0.000000"
ia_bright_boost = "0.000000"
ia_R = "1.000000"
ia_G = "1.000000"
ia_B = "1.000000"
ia_ZOOM = "1.000000"
ia_XPOS = "0.000000"
ia_YPOS = "0.000000"
ia_TOPMASK = "0.000000"
ia_BOTMASK = "0.000000"
ia_LMASK = "0.000000"
ia_RMASK = "0.000000"
ia_GRAIN_STR = "0.000000"
ia_SHARPEN = "0.000000"
ia_FLIP_HORZ = "1.000000"
ia_FLIP_VERT = "1.000000"
CURVATURE_X = "0.100000"
CURVATURE_Y = "0.150000"
MASK_BRIGHTNESS = "0.700000"
SCANLINE_WEIGHT = "6.000000"
SCANLINE_GAP_BRIGHTNESS = "0.120000"
BLOOM_FACTOR = "1.500000"
INPUT_GAMMA = "2.400000"
OUTPUT_GAMMA = "2.200000"

[oneswitch]

That's much better thank you!

There's still a slight green/pink tinge (maybe something to do with my monitor), but it's much better than it was.

[hizzlekizzle]

Does that get you fixed up? Should we close this issue?

[oneswitch]

Yes, thank you. Top job.