roooma

text_rendering/ren.c

@@ -0,0 +1,53 @@
+#include <SDL2/SDL.h>
+#include <GL/glew.h>
+#include <SDL2/SDL_opengl.h>
+
+
+#define GLSL_VERT_SHADER "vertex.glsl"
+#define GLSL_FRAG_SHADER "fragment.glsl"
+#define PACKED __attribute__((packed))
+
+
+struct {
+	SDL_Window *w;
+	SDL_GLContext *gl;
+	GLuint gl_vertbuffer;
+	GLuint gl_program;
+	GLuint font_texture;
+} ren = {0};
+
+
+typedef struct PACKED {
+	union { GLint x, u; };
+	union { GLint y, v; };
+} vec2_i;
+
+typedef struct PACKED {
+	union { GLint x, r; };
+	union { GLint y, g; };
+	union { GLint z, b; };
+	union { GLint w, a; };
+} vec4_i;
+
+// textured vertex
+struct PACKED v_text {
+	vec2_i pos;
+	vec2_i uv;
+};
+
+// colored vertex
+struct PACKED v_col {
+	vec2_i pos;
+	vec2_i col;
+};
+
+
+// different stacks
+#define _STACK_NAME vtstack
+#define _STACK_TYPE struct v_text
+#include "stack.h"
+#undef _STACK_NAME
+#undef _STACK_TYPE
+#define _STACK_NAME vcstack
+#define _STACK_TYPE struct v_col
+#include "stack.h"