change identation, maybe will change back, add own gl functions loading, and glx example

1 files changed, 42 insertions, 0 deletions

diff --git a/shader.c b/shader.c
new file mode 100644
index 0000000..cc01ad6
--- /dev/null
+++ b/shader.c
@@ -0,0 +1,42 @@
+#include "shader.h"
+
+u32
+compile_shader(u32 type, const char *src)
+{
+    if (!src) {
+        info("no source");
+        return 0;
+    }
+    u32 id = gl_create_shader(type);
+    gl_shader_source(id, 1, &src, 0);
+    gl_compile_shader(id);
+    i32 status;
+    gl_get_shader_iv(id, gl_compile_status, &status);
+    if (!status) {
+        char log[512];
+        gl_get_shader_info_log(id, 512, 0, log);
+        die("%s", log);
+    }
+    return id;
+}
+
+u32
+create_shader(const char *vert_src, const char *frag_src)
+{
+    u32 program = gl_create_program();
+    u32 vert = compile_shader(gl_vertex_shader, vert_src);
+    u32 frag = compile_shader(gl_fragment_shader, frag_src);
+    gl_attach_shader(program, vert);
+    gl_attach_shader(program, frag);
+    gl_link_program(program);
+    gl_delete_shader(vert);
+    gl_delete_shader(frag);
+    i32 success;
+    gl_get_program_iv(program, gl_link_status, &success);
+    if (!success) {
+        char log[512];
+        gl_get_program_info_log(program, 512, 0, log);
+        die("%s", log);
+    }
+    return program;
+}