Shaders extra settings for shaders

skeleton/BASE/Shaders/glsl/lcd1x.glsl

@@ -0,0 +1,124 @@
+/*
+   lcd1x shader
+
+   A slightly tweaked version of lcd3x, original code written by Gigaherz
+   and released into the public domain:
+
+   > Omits LCD 'colour seperation' effect
+
+   > Has 'properly' aligned scanlines
+
+   Edited by jdgleaver
+
+   This program is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by the Free
+   Software Foundation; either version 2 of the License, or (at your option)
+   any later version.
+*/
+
+#pragma parameter BRIGHTEN_SCANLINES "Brighten Scanlines" 16.0 1.0 32.0 0.5
+#pragma parameter BRIGHTEN_LCD "Brighten LCD" 4.0 1.0 12.0 0.1
+
+#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 highp
+#else
+#define COMPAT_PRECISION
+#endif
+
+COMPAT_ATTRIBUTE vec4 VertexCoord;
+COMPAT_ATTRIBUTE vec4 COLOR;
+COMPAT_ATTRIBUTE vec4 TexCoord;
+COMPAT_VARYING vec4 TEX0;
+
+uniform mat4 MVPMatrix;
+uniform COMPAT_PRECISION int FrameDirection;
+uniform COMPAT_PRECISION int FrameCount;
+uniform COMPAT_PRECISION vec2 OutputSize;
+uniform COMPAT_PRECISION vec2 TextureSize;
+uniform COMPAT_PRECISION vec2 InputSize;
+
+/*
+   VERTEX_SHADER
+*/
+void main()
+{
+   TEX0 = TexCoord * 1.0001;
+   gl_Position = MVPMatrix * VertexCoord;
+}
+
+#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
+precision highp float;
+precision highp int;
+#define COMPAT_PRECISION highp
+#else
+#define COMPAT_PRECISION
+#endif
+
+uniform COMPAT_PRECISION int FrameDirection;
+uniform COMPAT_PRECISION int FrameCount;
+uniform COMPAT_PRECISION vec2 OrigInputSize;
+uniform COMPAT_PRECISION vec2 TextureSize;
+uniform COMPAT_PRECISION vec2 InputSize;
+uniform COMPAT_PRECISION vec2 OutputSize;
+uniform sampler2D Texture;
+COMPAT_VARYING vec4 TEX0;
+
+#ifdef PARAMETER_UNIFORM
+// All parameter floats need to have COMPAT_PRECISION in front of them
+uniform COMPAT_PRECISION float BRIGHTEN_SCANLINES;
+uniform COMPAT_PRECISION float BRIGHTEN_LCD;
+#else
+#define BRIGHTEN_SCANLINES 16.0
+#define BRIGHTEN_LCD 4.0
+#endif
+
+// Magic Numbers
+#define PI 3.141592654
+
+/*
+   FRAGMENT SHADER
+*/
+void main()
+{
+   // Generate LCD grid effect
+   // > Note the 0.25 pixel offset -> required to ensure that
+   //   scanlines occur *between* pixels
+   COMPAT_PRECISION vec2 angle =
+      2.0 * PI * ((TEX0.xy * OrigInputSize * TextureSize / InputSize) - 0.25);
+
+   COMPAT_PRECISION float yfactor = (BRIGHTEN_SCANLINES + sin(angle.y)) / (BRIGHTEN_SCANLINES + 1.0);
+   COMPAT_PRECISION float xfactor = (BRIGHTEN_LCD + sin(angle.x)) / (BRIGHTEN_LCD + 1.0);
+
+   // Get colour sample
+   COMPAT_PRECISION vec3 colour = COMPAT_TEXTURE(Texture, TEX0.xy).rgb;
+
+   // Apply LCD grid effect
+   colour.rgb = yfactor * xfactor * colour.rgb;
+
+   FragColor = vec4(colour.rgb, 1.0);
+} 
+#endif

workspace/all/common/api.h

@@ -212,6 +212,19 @@ enum {
 	MODE_MAIN,
 	MODE_MENU,
 };
+#include "opengl.h"
+#define MAX_PARAM_NAME 128
+#define MAX_PARAM_LABEL 128
+typedef struct {
+    char name[MAX_PARAM_NAME];
+    char label[MAX_PARAM_LABEL];
+    float def;
+    float min;
+    float max;
+    float step;
+	float value;
+	GLint uniformLocation;
+} ShaderParam;
 
 SDL_Surface* GFX_init(int mode);
 #define GFX_resize PLAT_resizeVideo				// (int w, int h, int pitch);
@@ -568,6 +581,7 @@ void PLAT_setShader2(const char* filename);
 void PLAT_setShader3(const char* filename);
 void PLAT_updateShader(int i, const char *filename, int *scale, int *filter, int *scaletype, int *inputtype);
 void PLAT_initShaders();
+ShaderParam* PLAT_getShaderPragmas(int i);
 int PLAT_supportsOverscan(void);
 
 SDL_Surface* PLAT_initOverlay(void);