X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=README;h=ec67534bae7a814040c3f0874961dd7fd2112f66;hp=26ceaacf357d66eadd14b6eedf429691716e1e90;hb=6e03d8c6dec4b4639137893fe4e1aff224836f59;hpb=72cb236f13d9e0823acd1ecf261b6e92ace48de2

diff --git a/README b/README
index 26ceaac..ec67534 100644
--- a/README
+++ b/README
@@ -22,11 +22,12 @@ OK, you need
 * GNU Make.
 * A GPU capable of running GLSL fragment shaders,
   process floating-point textures, and a few other things. If your machine
-  is less than five years old _and you have the appropriate drivers_
-  (don't complain to me if it doesn't work with Nouveau, please),
+  is less than five years old _and you have the appropriate drivers_,
   you're home free.
 * The [Eigen 3] and [Google Test] libraries. (The library itself
   depends only on the former, but you probably want to run the unit tests.)
+* The [GLEW] library, for dealing with OpenGL extensions on various
+  platforms.
 
 Movit has been tested with Intel GPUs with the Mesa drivers
 (you'll probably need at least Mesa 8.0), Radeon 3850 and GeForce GTX 550
@@ -39,7 +40,7 @@ Still TL;DR, please give me the list of filters
 ===============================================
 
 Blur, diffusion, glow, lift/gamma/gain (color correction), mirror,
-mix (add two inputs), overlay (the Porter-Duff “atop” operation),
+mix (add two inputs), overlay (the Porter-Duff “over” operation),
 scale (bilinear and Lanczos), sharpen (both by unsharp mask and by
 Wiener filters), saturation (or desaturation), vignette, and white balance.
 
@@ -60,7 +61,7 @@ Assuming you have an OpenGL context already set up:
   ImageFormat inout_format;
   inout_format.color_space = COLORSPACE_sRGB;
   inout_format.gamma_curve = GAMMA_sRGB;
-  FlatInput *input = knew FlatInput(inout_format, FORMAT_BGRA, GL_UNSIGNED_BYTE, 1280, 720));
+  FlatInput *input = knew FlatInput(inout_format, FORMAT_BGRA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, 1280, 720));
   chain.add_input(input);
 
   Effect *saturation_effect = chain.add_effect(new SaturationEffect());
@@ -70,7 +71,7 @@ Assuming you have an OpenGL context already set up:
   const float gain[] = { 0.8f, 1.0f, 1.0f };
   lift_gamma_gain_effect->set_vec3("gain", &gain);
 
-  chain.add_output(inout_format);
+  chain.add_output(inout_format, OUTPUT_POSTMULTIPLIED_ALPHA);
   chain.finalize();
 
   for ( ;; ) {