mirror of
https://github.com/joncampbell123/dosbox-x.git
synced 2025-10-16 14:08:55 +08:00
94 lines
2.1 KiB
GLSL
94 lines
2.1 KiB
GLSL
#version 120
|
|
/*
|
|
|
|
dugan_CRT-EasyMode_tweaked.glsl
|
|
dugan's ScanLine shader
|
|
adapted by liPillON for usage with DosBox SVN r4319 and later
|
|
no tweaks
|
|
|
|
source shader files:
|
|
https://github.com/duganchen/dosbox_shaders/blob/master/scanline.frag
|
|
https://github.com/duganchen/dosbox_shaders/blob/master/scanline.vert
|
|
|
|
first posted here:
|
|
https://www.vogons.org/viewtopic.php?f=32&t=72697
|
|
|
|
*/
|
|
|
|
#if defined(VERTEX)
|
|
|
|
#if __VERSION__ >= 130
|
|
#define COMPAT_VARYING out
|
|
#define COMPAT_ATTRIBUTE in
|
|
#define COMPAT_TEXTURE texture
|
|
#else
|
|
#define COMPAT_VARYING varying
|
|
#define COMPAT_ATTRIBUTE attribute
|
|
#define COMPAT_TEXTURE texture2D
|
|
#endif
|
|
|
|
#ifdef GL_ES
|
|
#define COMPAT_PRECISION mediump
|
|
#else
|
|
#define COMPAT_PRECISION
|
|
#endif
|
|
|
|
uniform vec2 rubyTextureSize;
|
|
uniform vec2 rubyInputSize;
|
|
uniform vec2 rubyOutputSize;
|
|
|
|
COMPAT_ATTRIBUTE vec4 a_position;
|
|
COMPAT_VARYING vec2 v_texCoord;
|
|
|
|
COMPAT_VARYING vec2 omega;
|
|
|
|
void main()
|
|
{
|
|
gl_Position = a_position;
|
|
v_texCoord = vec2(a_position.x+1.0,1.0-a_position.y)/2.0*rubyInputSize/rubyTextureSize;
|
|
|
|
omega = vec2(3.1415 * rubyOutputSize.x * rubyTextureSize.x / rubyInputSize.x, 2.0 * 3.1415 * rubyTextureSize.y);
|
|
}
|
|
|
|
#elif defined(FRAGMENT)
|
|
|
|
#if __VERSION__ >= 130
|
|
#define COMPAT_VARYING in
|
|
#define COMPAT_TEXTURE texture
|
|
out vec4 FragColor;
|
|
#else
|
|
#define COMPAT_VARYING varying
|
|
#define FragColor gl_FragColor
|
|
#define COMPAT_TEXTURE texture2D
|
|
#endif
|
|
|
|
#ifdef GL_ES
|
|
#ifdef GL_FRAGMENT_PRECISION_HIGH
|
|
precision highp float;
|
|
#else
|
|
precision mediump float;
|
|
#endif
|
|
#define COMPAT_PRECISION highp
|
|
#else
|
|
#define COMPAT_PRECISION
|
|
#endif
|
|
|
|
const float SCANLINE_BASE_BRIGHTNESS = 0.95;
|
|
const float SCANLINE_SINE_COMP_A = 0.05;
|
|
const float SCANLINE_SINE_COMP_B = 0.15;
|
|
|
|
COMPAT_VARYING vec2 v_texCoord;
|
|
uniform sampler2D rubyTexture;
|
|
|
|
COMPAT_VARYING vec2 omega;
|
|
|
|
void main()
|
|
{
|
|
vec2 sine_comp = vec2(SCANLINE_SINE_COMP_A, SCANLINE_SINE_COMP_B);
|
|
vec3 res = COMPAT_TEXTURE(rubyTexture, v_texCoord).xyz;
|
|
vec3 scanline = res * (SCANLINE_BASE_BRIGHTNESS + dot(sine_comp * sin(v_texCoord * omega), vec2(1.0, 1.0)));
|
|
FragColor = vec4(scanline.x, scanline.y, scanline.z, 1.0);
|
|
}
|
|
|
|
#endif
|