Split out some private utilities into effect_util.cpp, so we do not need to include...

[movit] / effect_util.cpp

diff --git a/effect_util.cpp b/effect_util.cpp
new file mode 100644 (file)
index 0000000..e57a562
--- /dev/null
+++ b/effect_util.cpp
@@ -0,0 +1,97 @@
+#include <GL/glew.h>
+#include <Eigen/Core>
+#include <stddef.h>
+#include <string>
+#include "util.h"
+
+GLint get_uniform_location(GLuint glsl_program_num, const std::string &prefix, const std::string &key)
+{
+       std::string name = prefix + "_" + key;
+       return glGetUniformLocation(glsl_program_num, name.c_str());
+}
+
+void set_uniform_int(GLuint glsl_program_num, const std::string &prefix, const std::string &key, int value)
+{
+       GLint location = get_uniform_location(glsl_program_num, prefix, key);
+       if (location == -1) {
+               return;
+       }
+       check_error();
+       glUniform1i(location, value);
+       check_error();
+}
+
+void set_uniform_float(GLuint glsl_program_num, const std::string &prefix, const std::string &key, float value)
+{
+       GLint location = get_uniform_location(glsl_program_num, prefix, key);
+       if (location == -1) {
+               return;
+       }
+       check_error();
+       glUniform1f(location, value);
+       check_error();
+}
+
+void set_uniform_vec2(GLuint glsl_program_num, const std::string &prefix, const std::string &key, const float *values)
+{
+       GLint location = get_uniform_location(glsl_program_num, prefix, key);
+       if (location == -1) {
+               return;
+       }
+       check_error();
+       glUniform2fv(location, 1, values);
+       check_error();
+}
+
+void set_uniform_vec3(GLuint glsl_program_num, const std::string &prefix, const std::string &key, const float *values)
+{
+       GLint location = get_uniform_location(glsl_program_num, prefix, key);
+       if (location == -1) {
+               return;
+       }
+       check_error();
+       glUniform3fv(location, 1, values);
+       check_error();
+}
+
+void set_uniform_vec4(GLuint glsl_program_num, const std::string &prefix, const std::string &key, const float *values)
+{
+       GLint location = get_uniform_location(glsl_program_num, prefix, key);
+       if (location == -1) {
+               return;
+       }
+       check_error();
+       glUniform4fv(location, 1, values);
+       check_error();
+}
+
+void set_uniform_vec4_array(GLuint glsl_program_num, const std::string &prefix, const std::string &key, const float *values, size_t num_values)
+{
+       GLint location = get_uniform_location(glsl_program_num, prefix, key);
+       if (location == -1) {
+               return;
+       }
+       check_error();
+       glUniform4fv(location, num_values, values);
+       check_error();
+}
+
+void set_uniform_mat3(GLuint glsl_program_num, const std::string &prefix, const std::string &key, const Eigen::Matrix3d& matrix)
+{
+       GLint location = get_uniform_location(glsl_program_num, prefix, key);
+       if (location == -1) {
+               return;
+       }
+       check_error();
+
+       // Convert to float (GLSL has no double matrices).
+       float matrixf[9];
+       for (unsigned y = 0; y < 3; ++y) {
+               for (unsigned x = 0; x < 3; ++x) {
+                       matrixf[y + x * 3] = matrix(y, x);
+               }
+       }
+
+       glUniformMatrix3fv(location, 1, GL_FALSE, matrixf);
+       check_error();
+}