renderer2d quads work (without textures or pixel coordinates)

CMakeLists.txt

@@ -87,7 +87,7 @@ add_library(skunkworks STATIC
         src/types.c
         src/vec2i.c
         src/vertex_buffer.c
-        src/window.c include/vec2f.h src/vec2f.c src/vec4f.c include/vec4f.h)
+        src/window.c include/vec2f.h src/vec2f.c src/vec4f.c include/vec4f.h src/renderer2d_frag.glsl src/renderer2d_vert.glsl src/shader_copy_frag.glsl src/shader_copy_vert.glsl src/shader_scale_frag.glsl src/gsa_vert.glsl src/gsa_frag.glsl)
 
 add_executable(skip
         tools/skip.c)

src/renderer2d.c

@@ -36,11 +36,18 @@ struct sw_renderer2d *sw_renderer2d_create() {
 	glGenBuffers(1, &ren->vbo);
 	glBindBuffer(GL_ARRAY_BUFFER, ren->vbo);
 
-	/* todo: vertex attrib thingies */
 	glVertexAttribPointer(
 		0, 2, GL_FLOAT, GL_FALSE, sizeof(struct vert), 0
 	);
+	glVertexAttribPointer(
+		2,
+		4,
+		GL_FLOAT,
+		GL_FALSE,
+		sizeof(struct vert),
+		(void *) (2 * sizeof(f32)));
 	glEnableVertexAttribArray(0);
+	glEnableVertexAttribArray(2);
 
 	glBindVertexArray(0);
 
@@ -88,13 +95,7 @@ static void r_enter(struct sw_window *win, void *data) {
 
 	ren = data;
 	sw_vertex_buffer_clear(ren->vertex_buffer);
-
-	sw_renderer2d_draw_quad(
-		ren,
-		sw_vec2f(-0.5f, -0.5f),
-		sw_vec2f(0.5f, -0.5f),
-		sw_vec2f(-0.5f, 0.5f),
-		sw_vec2f(0.5f, 0.5f));
+	ren->color = sw_vec4f(1.f, 1.f, 1.f, 1.f);
 
 	glBindVertexArray(ren->vao);
 	sw_shaderprogram_use(ren->shader);

src/renderer2d_frag.glsl

@@ -1,7 +1,8 @@
 #version 460
 
+in vec4 vcolor;
 layout(location = 0) out vec4 color;
 
 void main() {
-	color = vec4(0.1, 0.2, 0.3, 1.0);
+    color = vcolor;
 }

src/renderer2d_vert.glsl

@@ -1,7 +1,11 @@
 #version 460
 
 layout(location = 0) in vec2 pos;
+layout(location = 2) in vec4 color;
+
+out vec4 vcolor;
 
 void main() {
     gl_Position = vec4(pos, 0.0, 1.0);
+    vcolor = color;
 }