some basic 3D rendering and the base for chunk generation etc.

1 files changed, 57 insertions, 0 deletions

diff --git a/src/engine/M_shader.c b/src/engine/M_shader.c
new file mode 100644
index 0000000..17f6248
--- /dev/null
+++ b/src/engine/M_shader.c
@@ -0,0 +1,57 @@
+#include "M_shader.h"
+
+unsigned int M_loadShader(const char* filename, unsigned int shadertype)
+{
+	void* shader_source = SDL_LoadFile(filename, NULL);
+	unsigned int shader = glCreateShader(shadertype);
+	glShaderSource(shader, 1, (const char**)&shader_source, NULL);
+	glCompileShader(shader);
+	SDL_free(shader_source);
+
+	int success;
+
+	glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
+	if (!success) {
+		printf("Couldn't compile shader\n");
+		return 0;
+	}
+
+	return shader;
+}
+
+M_ShaderProgram M_createShaderProgram(const char *vertex_shader_file, const char* fragment_shader_file)
+{
+	unsigned int vertex_shader = M_loadShader(vertex_shader_file, GL_VERTEX_SHADER);
+	unsigned int fragment_shader = M_loadShader(fragment_shader_file, GL_FRAGMENT_SHADER);
+	return M_compileShaderProgram(vertex_shader, fragment_shader);
+}
+
+M_ShaderProgram M_compileShaderProgram(unsigned int vertex_shader, unsigned int fragment_shader)
+{
+	M_ShaderProgram shader_program;
+	shader_program.prog = glCreateProgram();
+	glAttachShader(shader_program.prog, vertex_shader);
+	glAttachShader(shader_program.prog, fragment_shader);
+	glLinkProgram(shader_program.prog);
+
+	shader_program.vertex_shader = vertex_shader;
+	shader_program.fragment_shader = fragment_shader;
+
+	int success;
+	glGetProgramiv(shader_program.prog, GL_LINK_STATUS, &success);
+	if (!success) {
+		printf("Couldn't link shader program\n");
+	}
+
+	shader_program.transform_loc = glGetUniformLocation(shader_program.prog, "model");
+	shader_program.view_loc = glGetUniformLocation(shader_program.prog, "view");
+	shader_program.projection_loc = glGetUniformLocation(shader_program.prog, "projection");
+
+	return shader_program;
+}
+
+void M_killShaderProgram(M_ShaderProgram *shader_program)
+{
+	glDeleteShader(shader_program->vertex_shader);
+	glDeleteShader(shader_program->fragment_shader);
+}