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Diffstat (limited to 'src/osd/modules/opengl/shader/glsl_bilinear_rgb32_dir.fsh.c')
-rw-r--r--src/osd/modules/opengl/shader/glsl_bilinear_rgb32_dir.fsh.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/src/osd/modules/opengl/shader/glsl_bilinear_rgb32_dir.fsh.c b/src/osd/modules/opengl/shader/glsl_bilinear_rgb32_dir.fsh.c
new file mode 100644
index 00000000000..d6265b8905b
--- /dev/null
+++ b/src/osd/modules/opengl/shader/glsl_bilinear_rgb32_dir.fsh.c
@@ -0,0 +1,56 @@
+const char glsl_bilinear_rgb32_dir_fsh_src[] =
+"\n"
+"#pragma optimize (on)\n"
+"#pragma debug (off)\n"
+"\n"
+"uniform sampler2D color_texture;\n"
+"uniform vec2 color_texture_pow2_sz; // pow2 tex size\n"
+"uniform vec4 vid_attributes; // gamma, contrast, brightness\n"
+"\n"
+"// #define DO_GAMMA 1 // 'pow' is very slow on old hardware, i.e. pre R600 and 'slow' in general\n"
+"\n"
+"#define TEX2D(v) texture2D(color_texture,(v))\n"
+"\n"
+"void main()\n"
+"{\n"
+" vec2 xy = gl_TexCoord[0].st;\n"
+"\n"
+" // mix(x,y,a): x*(1-a) + y*a\n"
+" //\n"
+" // bilinear filtering includes 2 mix:\n"
+" //\n"
+" // pix1 = tex[x0][y0] * ( 1 - u_ratio ) + tex[x1][y0] * u_ratio\n"
+" // pix2 = tex[x0][y1] * ( 1 - u_ratio ) + tex[x1][y1] * u_ratio\n"
+" // fin = pix1 * ( 1 - v_ratio ) + pix2 * v_ratio\n"
+" //\n"
+" // so we can use the build in mix function for these 2 computations ;-)\n"
+" //\n"
+" vec2 uv_ratio = fract(xy*color_texture_pow2_sz); // xy*color_texture_pow2_sz - floor(xy*color_texture_pow2_sz);\n"
+" vec2 one = 1.0/color_texture_pow2_sz;\n"
+"\n"
+"#if 1\n"
+" vec4 col, col2;\n"
+"\n"
+" col = mix( TEX2D(xy ), TEX2D(xy + vec2(one.x, 0.0)), uv_ratio.x);\n"
+" col2 = mix( TEX2D(xy + vec2(0.0, one.y)), TEX2D(xy + one ), uv_ratio.x);\n"
+" col = mix ( col, col2, uv_ratio.y );\n"
+"#else\n"
+" // doesn't work on MacOSX GLSL engine ..\n"
+" //\n"
+" vec4 col = mix ( mix( TEX2D(xy ), TEX2D(xy + vec2(one.x, 0.0)), uv_ratio.x),\n"
+" mix( TEX2D(xy + vec2(0.0, one.y)), TEX2D(xy + one ), uv_ratio.x), uv_ratio.y );\n"
+"#endif\n"
+"\n"
+" // gamma, contrast, brightness equation from: rendutil.h / apply_brightness_contrast_gamma_fp\n"
+"\n"
+"#ifdef DO_GAMMA\n"
+" // gamma/contrast/brightness\n"
+" vec4 gamma = vec4(1.0 / vid_attributes.r, 1.0 / vid_attributes.r, 1.0 / vid_attributes.r, 0.0);\n"
+" gl_FragColor = ( pow ( col, gamma ) * vid_attributes.g) + vid_attributes.b - 1.0;\n"
+"#else\n"
+" // contrast/brightness\n"
+" gl_FragColor = ( col * vid_attributes.g) + vid_attributes.b - 1.0;\n"
+"#endif\n"
+"}\n"
+"\n"
+;