X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=effect_util.cpp;fp=effect_util.cpp;h=e57a562f870da38f93a07243caf801fa11d48b58;hp=0000000000000000000000000000000000000000;hb=ad66f9714e4a36008c341355700272a52484a785;hpb=37f56fcbe571b2322243f6de59494bf9e0cbb37a

diff --git a/effect_util.cpp b/effect_util.cpp
new file mode 100644
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();
+}