2016 README updates.

[movit] / init.cpp

diff --git a/init.cpp b/init.cpp
index 7781ba24ccd7e8fb76c1e5f305ecff8ba75c35bc..b9e68ab16e9d0c9ed164ea28b7f47b03d253f681 100644 (file)
--- a/init.cpp
+++ b/init.cpp
@@ -18,7 +18,6 @@ float movit_texel_subpixel_precision;
 bool movit_srgb_textures_supported;
 bool movit_timer_queries_supported;
 int movit_num_wrongly_rounded;
-bool movit_shader_rounding_supported;
 MovitShaderModel movit_shader_model;
 
 // The rules for objects with nontrivial constructors in static scope
@@ -79,9 +78,11 @@ void measure_texel_subpixel_precision()
 
        glViewport(0, 0, width, 1);
 
+       vector<string> frag_shader_outputs;
        GLuint glsl_program_num = resource_pool.compile_glsl_program(
                read_version_dependent_file("vs", "vert"),
-               read_version_dependent_file("texture1d", "frag"));
+               read_version_dependent_file("texture1d", "frag"),
+               frag_shader_outputs);
        glUseProgram(glsl_program_num);
        check_error();
        glUniform1i(glGetUniformLocation(glsl_program_num, "tex"), 0);  // Bind the 2D sampler.
@@ -211,9 +212,11 @@ void measure_roundoff_problems()
 
        glViewport(0, 0, 512, 1);
 
+       vector<string> frag_shader_outputs;
        GLuint glsl_program_num = resource_pool.compile_glsl_program(
                read_version_dependent_file("vs", "vert"),
-               read_version_dependent_file("texture1d", "frag"));
+               read_version_dependent_file("texture1d", "frag"),
+               frag_shader_outputs);
        glUseProgram(glsl_program_num);
        check_error();
        glUniform1i(glGetUniformLocation(glsl_program_num, "tex"), 0);  // Bind the 2D sampler.
@@ -314,7 +317,6 @@ bool check_extensions()
        if (!epoxy_is_desktop_gl()) {
                if (epoxy_gl_version() >= 30) {
                        movit_srgb_textures_supported = true;
-                       movit_shader_rounding_supported = true;
                        return true;
                } else {
                        fprintf(stderr, "Movit system requirements: GLES version %.1f is too old (GLES 3.0 needed).\n",
@@ -349,13 +351,6 @@ bool check_extensions()
        movit_srgb_textures_supported =
                (epoxy_gl_version() >= 21 || epoxy_has_gl_extension("GL_EXT_texture_sRGB"));
 
-       // We may want to use round() at the end of the final shader,
-       // if supported. We need either GLSL 1.30 or this extension to do that,
-       // and 1.30 brings with it other things that we don't want to demand
-       // for now.
-       movit_shader_rounding_supported =
-               (epoxy_gl_version() >= 30 || epoxy_has_gl_extension("GL_EXT_gpu_shader4"));
-
        // The user can specify that they want a timing report for each
        // phase in an effect chain. However, that depends on this extension;
        // without it, we do cannot even create the query objects.
@@ -433,14 +428,7 @@ bool init_movit(const string& data_directory, MovitDebugLevel debug_level)
                if (get_glsl_version() < 1.30f) {
                        fprintf(stderr, "Movit system requirements: Needs at least GLSL version 1.30 (has version %.1f)\n",
                                get_glsl_version());
-                       if (get_glsl_version() >= 1.10f) {
-                               fprintf(stderr, "Attempting to continue nevertheless; expect shader compilation issues.\n");
-                               fprintf(stderr, "Try switching to a core OpenGL context, as especially OS X drivers\n");
-                               fprintf(stderr, "support newer GLSL versions there.\n");
-                               movit_shader_model = MOVIT_GLSL_130_AS_110;
-                       } else {
-                               return false;
-                       }
+                       return false;
                }
                if (get_glsl_version() < 1.50f) {
                        movit_shader_model = MOVIT_GLSL_130;