Added render to texture support

src/array.c

@@ -17,7 +17,6 @@ struct Array
 static struct Array* array_get_ptr(void* array_data);
 static struct Array* array_reallocate(struct Array* array);
 static void*         array_top(struct Array* array);
-static void*         array_get(struct Array* array, unsigned int index);
 
 static struct Array* array_get_ptr(void* array_data)
 {
@@ -26,7 +25,7 @@ static struct Array* array_get_ptr(void* array_data)
 
 void* array_new_(size_t object_size, int capacity)
 {
-	capacity = capacity == 0 ? ARRAY_MIN_CAPACITY : capacity;
+	if(capacity == 0) capacity = ARRAY_MIN_CAPACITY;
 	struct Array* new_array = malloc(sizeof(*new_array) + (object_size * capacity));
 	new_array->object_size = object_size;
 	new_array->length = 0;
@@ -41,11 +40,6 @@ void array_free(void* array)
 	free(array_ptr);
 }
 
-void* array_get(struct Array* array, unsigned int index)
-{
-	return array->data + (array->object_size * index);
-}
-
 void* array_top(struct Array* array)
 {
 	return array->data + (array->object_size * (array->length - 1));
@@ -81,6 +75,7 @@ int array_reset_(void** array, int length)
 	size_t object_size = array_ptr->object_size;
 	int new_capacity = length < ARRAY_MIN_CAPACITY ? ARRAY_MIN_CAPACITY : length;
 	int new_length = new_capacity;
+	array_free(*array);
 	array_ptr = calloc(1, sizeof(*array_ptr) + (new_capacity * object_size));
 	if(array_ptr)
 	{
@@ -187,7 +182,8 @@ void array_inc_cap_by_(void** array, int cap)
 	if(cap > 0)
 	{
 		array_ptr->capacity += cap;
-		char* new_data = realloc(array_ptr, sizeof(*array_ptr) + (array_ptr->object_size * array_ptr->capacity));
+		char* new_data = realloc(array_ptr,
+								 sizeof(*array_ptr) + (array_ptr->object_size * array_ptr->capacity));
 		if(new_data)
 		{
 			array_ptr = (struct Array*)new_data;
@@ -195,8 +191,29 @@ void array_inc_cap_by_(void** array, int cap)
 		}
 		else
 		{
-			array_ptr->capacity = array_ptr->capacity -= cap;
+			array_ptr->capacity -= cap;
 			/* TODO: Error handling here! */
 		}
 	}
 }
+
+int array_copy_(void* array_src, void** array_dest)
+{
+	int success = 0;
+	struct Array* src = array_get_ptr(array_src);
+	struct Array* dest = array_get_ptr(*array_dest);
+	
+	/* determine if copy is possible */
+	if(src->object_size != dest->object_size)
+		return success;
+
+	if((src->length > dest->length) && (dest->capacity < src->length))
+	{
+		array_free(*array_dest);
+		*array_dest = array_new_(src->object_size, src->capacity);
+		dest = *array_dest;
+	}
+	memcpy(dest->data, src->data, src->object_size * src->length);
+	dest->length = src->length;
+	return success;
+}

src/array.h

@@ -11,6 +11,7 @@ int   array_pop_(void** array);	// Remove object with highest index
 int   array_remove_at_(void** array, int index);
 void  array_match_len_cap_(void** array);
 void  array_inc_cap_by_(void** array, int cap);
+int   array_copy_(void* arr_src, void** arr_dest);
 
 /* Public Api */
 #define array_new(type)                  (type*) array_new_(sizeof(type), 0); // Use this for array creation
@@ -27,9 +28,11 @@ void  array_inc_cap_by_(void** array, int cap);
 #define array_reset(array, length)       array_reset_((void**)&array, length);
 #define array_match_len_cap(array)       array_match_len_cap_((void**)&array);
 #define array_inc_cap_by(array, cap)     array_inc_cap_by_((void**)&array, cap);
+#define array_copy(src, dest)            array_copy_(src, (void**)&dest);
 int  array_len(void* array);
 int  array_capacity(void* array);
 void array_free(void* array);
+
 /* TODO function to increase capacity of array by certain number similar to reserve in stl vector? */
 
 #endif

src/framebuffer.c

@@ -144,15 +144,15 @@ void framebuffer_set_texture(int index, int texture, int attachment)
 						   GL_TEXTURE_2D,
 						   texture_get_texture_handle(texture),
 						   0);
-	if(!renderer_check_glerror("framebuffer:set_texture:glFramebuffertexture"))
+	/* if(!renderer_check_glerror("framebuffer:set_texture:glFramebuffertexture")) */
-	{
+	/* { */
-		int current_fbo_tex = fbo_list[index].texture;
+	/* 	int current_fbo_tex = fbo_list[index].texture; */
-		if(current_fbo_tex > -1)
+	/* 	if(current_fbo_tex > -1) */
-			texture_remove(current_fbo_tex);
+	/* 		texture_remove(current_fbo_tex); */
-
+
-		fbo_list[index].texture = texture;
+	/* 	fbo_list[index].texture = texture; */
-		texture_inc_refcount(texture);
+	/* 	texture_inc_refcount(texture); */
-	}
+	/* } */
 	glBindFramebuffer(GL_FRAMEBUFFER, current_fbo);
 }
 

src/game.c

@@ -37,14 +37,14 @@ void game_init(void)
 	GLFWwindow* window = window_get_active();
 	/* Init systems */
 	input_init(window);
-	renderer_init(window);
 	io_file_init("/mnt/Dev/Projects/Symmetry/assets/");/* TODO: Implement proper way of getting binary directory */
 	shader_init();
 	texture_init();
 	framebuffer_init();
+	geom_init();
+	renderer_init(window);
 	transform_init();
 	camera_init();
-	geom_init();
 	material_init();
 	model_init();
 	entity_init();

src/geometry.c

@@ -1,7 +1,5 @@
 #include "geometry.h"
 #include "array.h"
-#include "num_types.h"
-#include "linmath.h"
 #include "string_utils.h"
 #include "file_io.h"
 #include "log.h"
@@ -40,9 +38,9 @@ struct Geometry
 static struct Geometry* geometry_list;
 static int* empty_indices;
 
-/* Function definitions */
+static int  load_from_file(struct Geometry* geometry, const char* filename);
-int load_from_file(struct Geometry* geometry, const char* filename);
+static void create_vao(struct Geometry* geometry);
-void create_vao(struct Geometry* geometry);
+static struct Geometry* generate_new_index(int* out_new_index);
 
 void geom_init(void)
 {
@@ -65,26 +63,35 @@ int geom_find(const char* filename)
 	return index;
 }
 
-int geom_create(const char* name)
+static struct Geometry* generate_new_index(int* out_new_index)
 {
-	// check if exists
+	assert(out_new_index);
-	int index = geom_find(name);
-	if(index == -1)
-	{
-		/* add new geometry object or overwrite existing one */
-		struct Geometry* new_geo = NULL;
 	int empty_len = array_len(empty_indices);
+	struct Geometry* new_geo = NULL;
 	if(empty_len > 0)
 	{
-			index = empty_indices[empty_len - 1];
+		*out_new_index = empty_indices[empty_len - 1];
 		array_pop(empty_indices);
-			new_geo = &geometry_list[index];
+		new_geo = &geometry_list[*out_new_index];
 	}
 	else
 	{
 		new_geo = array_grow(geometry_list, struct Geometry);
-			index = array_len(geometry_list) - 1;
+		*out_new_index = array_len(geometry_list) - 1;
 	}
+	return new_geo;
+}
+
+int geom_create_from_file(const char* name)
+{
+	assert(name);
+	// check if exists
+	int index = geom_find(name);
+	if(index == -1)
+	{
+		/* add new geometry object or overwrite existing one */
+		struct Geometry* new_geo = NULL;
+		new_geo = generate_new_index(&index);
 		assert(new_geo);
 		
 		if(load_from_file(new_geo, name))
@@ -106,6 +113,38 @@ int geom_create(const char* name)
 	return index;
 }
 
+int geom_create(const char* name, vec3* vertices, vec2* uvs, vec3* normals, uint* indices, vec3* vertex_colors)
+{
+	assert(name && vertices && uvs && normals && indices);
+	int index = -1;
+	/* add new geometry object or overwrite existing one */
+	struct Geometry* new_geo = NULL;
+	new_geo = generate_new_index(&index);
+	assert(new_geo);
+	new_geo->filename = str_new(name);
+	new_geo->vertices = array_new_cap(vec3, array_len(vertices));
+	array_copy(vertices, new_geo->vertices);
+	new_geo->normals = array_new_cap(vec3, array_len(normals));
+	array_copy(normals, new_geo->normals);
+	new_geo->uvs = array_new_cap(vec2, array_len(uvs));
+	array_copy(uvs, new_geo->uvs);
+	new_geo->indices = array_new_cap(uint, array_len(indices));
+	array_copy(indices, new_geo->indices);
+	if(vertex_colors)
+	{
+		new_geo->vertex_colors = array_new_cap(vec3, array_len(vertex_colors));
+		array_copy(vertex_colors, new_geo->vertex_colors);
+	}
+	else
+	{
+		new_geo->vertex_colors = array_new(vec3);
+	}
+	create_vao(new_geo);
+	//generateBoundingBox(index);
+	return index;
+}
+
+
 void geom_remove(int index)
 {
 	if(index >= 0 && index < array_len(geometry_list))
@@ -122,6 +161,12 @@ void geom_remove(int index)
 				if(geometry->normals) array_free(geometry->normals);
 				if(geometry->vertex_colors) array_free(geometry->vertex_colors);
 				if(geometry->filename) free(geometry->filename);
+				geometry->indices       = NULL;
+				geometry->vertices      = NULL;
+				geometry->uvs           = NULL;
+				geometry->normals       = NULL;
+				geometry->vertex_colors = NULL;
+				geometry->filename      = NULL;
 				array_push(empty_indices, index, int);
 			}
 		}
@@ -137,7 +182,7 @@ void geom_cleanup(void)
 	array_free(empty_indices);
 }
 
-int load_from_file(struct Geometry* geometry, const char* filename)
+static int load_from_file(struct Geometry* geometry, const char* filename)
 {
 	assert(filename);
 	int success = 1;
@@ -195,9 +240,9 @@ int load_from_file(struct Geometry* geometry, const char* filename)
 	return success;
 }
 
-void create_vao(struct Geometry* geometry)
+static void create_vao(struct Geometry* geometry)
 {
-	// TODO : Add support for different model formats and interleaving VBO
+	// TODO: Add support for different model formats and interleaving VBO
 	assert(geometry);
 	glGenVertexArrays(1, &geometry->vao);
 	glBindVertexArray(geometry->vao);

src/geometry.h

@@ -1,8 +1,12 @@
 #ifndef geometry_H
 #define geometry_H
 
+#include "num_types.h"
+#include "linmath.h"
+
 void geom_init(void);
-int  geom_create(const char* name);
+int  geom_create_from_file(const char* name);
+int  geom_create(const char* name, vec3* vertices, vec2* uvs, vec3* normals, uint* indices, vec3* vertex_colors);
 int  geom_find(const char* filename);
 void geom_remove(int index);
 void geom_cleanup(void);

src/model.c

@@ -38,7 +38,7 @@ void model_init(void)
 int model_create(int node, const char* geo_name)
 {
 	assert(geo_name);
-	int geo_index = geom_create(geo_name);
+	int geo_index = geom_create_from_file(geo_name);
 	int index = -1;
 	struct Model* new_model = NULL;
 	if(geo_index > -1)

src/renderer.c

@@ -4,8 +4,19 @@
 #include "log.h"
 #include "camera.h"
 #include "model.h"
+#include "texture.h"
+#include "framebuffer.h"
+#include "array.h"
+#include "geometry.h"
+#include "shader.h"
+#include "num_types.h"
+#include "window_system.h"
 
-static int default_fbo = -1;
+static int def_fbo = -1;
+static int def_render_tex = -1;
+static int def_depth_tex = -1;
+static int quad_geo = -1;
+static int fbo_shader = -1;
 
 void on_framebuffer_size_change(GLFWwindow* window, int width, int height);
 
@@ -15,19 +26,105 @@ void renderer_init(GLFWwindow* window)
 	glEnable(GL_DEPTH_TEST);
 	glEnable(GL_TEXTURE_2D);
 	glfwSetFramebufferSizeCallback(window, on_framebuffer_size_change);
+
+	/* Quad geometry for final render */
+	vec3* vertices = array_new(vec3);
+	vec2* uvs = array_new(vec2);
+	vec3* normals = array_new(vec3);
+	uint* indices = array_new(uint);
+	vec3 temp_v3; 
+	vec2 temp_v2;
+	/* Vertices */
+	temp_v3.x = -1; temp_v3.y = -1; temp_v3.z = 0;	array_push(vertices, temp_v3, vec3);
+	temp_v3.x =  1; temp_v3.y = -1; temp_v3.z = 0;	array_push(vertices, temp_v3, vec3);
+	temp_v3.x =  1; temp_v3.y =  1; temp_v3.z = 0;	array_push(vertices, temp_v3, vec3);
+	temp_v3.x = -1; temp_v3.y =  1; temp_v3.z = 0;	array_push(vertices, temp_v3, vec3);
+	/* Normals */
+	temp_v3.x = 0; temp_v3.y = 1; temp_v3.z = 0;	array_push(normals, temp_v3, vec3);
+	temp_v3.x = 0; temp_v3.y = 1; temp_v3.z = 0;	array_push(normals, temp_v3, vec3);
+	/* Uvs */
+	temp_v2.x = 0; temp_v2.y = 0; array_push(uvs, temp_v2, vec2);
+	temp_v2.x = 1; temp_v2.y = 0; array_push(uvs, temp_v2, vec2);
+	temp_v2.x = 1; temp_v2.y = 1; array_push(uvs, temp_v2, vec2);
+	temp_v2.x = 0; temp_v2.y = 1; array_push(uvs, temp_v2, vec2);
+	/* Indices */
+	array_push(indices, 0, uint); array_push(indices, 1, uint); array_push(indices, 2, uint);
+	array_push(indices, 2, uint); array_push(indices, 3, uint); array_push(indices, 0, uint);
+	
+	quad_geo = geom_create("Quad", vertices, uvs, normals, indices, NULL);
+	array_free(vertices);
+	array_free(uvs);
+	array_free(normals);
+	array_free(indices);
+
+/* Textues for default fbo */
+	int width = -1, height = -1;
+	window_get_size(&width, &height);
+	def_render_tex = texture_create("def_render_texture",
+									TU_DIFFUSE,
+									width, height,
+									GL_RGBA,
+									GL_RGBA8,
+									GL_UNSIGNED_BYTE,
+									NULL);
+	texture_set_param(def_render_tex, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	texture_set_param(def_render_tex, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	texture_set_param(def_render_tex, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	texture_set_param(def_render_tex, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+	def_depth_tex = texture_create("def_depth_texture",
+									TU_SHADOWMAP1,
+									width, height,
+									GL_DEPTH_COMPONENT,
+									GL_DEPTH_COMPONENT,
+									GL_UNSIGNED_BYTE,
+									NULL);
+	texture_set_param(def_depth_tex, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	texture_set_param(def_depth_tex, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	texture_set_param(def_depth_tex, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	texture_set_param(def_depth_tex, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	texture_set_param(def_depth_tex, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
+	texture_set_param(def_depth_tex, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
+
+	def_fbo = framebuffer_create(width, height, 0, 1);
+	framebuffer_set_texture(def_fbo, def_render_tex, GL_COLOR_ATTACHMENT0);
+	framebuffer_set_texture(def_fbo, def_depth_tex, GL_DEPTH_ATTACHMENT);
+
+	fbo_shader = shader_create("fbo.vert", "fbo.frag");
 }
 
 void renderer_draw(void)
 {
+	framebuffer_bind(def_fbo);
+	{
+		glDrawBuffer(GL_COLOR_ATTACHMENT0);
+		glDepthFunc(GL_LEQUAL);
+		glEnable(GL_BLEND);
+		glBlendEquation(GL_FUNC_ADD);
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-	/* Hard coded version */
 		struct Camera* camera = camera_get(0);
 		model_render_all(camera);
+		glDisable(GL_BLEND);
+	}
+	framebuffer_unbind();
+
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	glEnable(GL_BLEND);
+	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+	shader_bind(fbo_shader);
+	texture_bind(def_render_tex);
+	geom_render(quad_geo);
+	texture_unbind(def_render_tex);
+	shader_unbind();
 }
 
 void renderer_cleanup(void)
 {
-	
+	shader_remove(fbo_shader);
+	geom_remove(quad_geo);
+	framebuffer_remove(def_fbo);
+	texture_remove(def_render_tex);
+	texture_remove(def_depth_tex);
 }
 
 void on_framebuffer_size_change(GLFWwindow* window, int width, int height)

src/texture.c

@@ -81,10 +81,10 @@ int texture_create_from_file(const char* filename, int texture_unit)
 			index = texture_create(filename, texture_unit, width, height, fmt, int_fmt, GL_UNSIGNED_BYTE, img_data);
 			if(index > -1)
 			{
-				texture_param_set(index, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+				texture_set_param(index, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-				texture_param_set(index, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+				texture_set_param(index, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-				texture_param_set(index,GL_TEXTURE_WRAP_S,GL_REPEAT);
+				texture_set_param(index,GL_TEXTURE_WRAP_S,GL_REPEAT);
-				texture_param_set(index,GL_TEXTURE_WRAP_T,GL_REPEAT);
+				texture_set_param(index,GL_TEXTURE_WRAP_T,GL_REPEAT);
 			}
 			else
 			{
@@ -291,7 +291,7 @@ int load_img(FILE* file, GLubyte** image_data, int* width, int* height, int* fmt
 	return success;
 }
 
-void texture_param_set(int index, int parameter, int value)
+void texture_set_param(int index, int parameter, int value)
 {
 	struct Texture* texture = NULL;
 	if(index > -1 && index < array_len(texture_list))
@@ -303,7 +303,7 @@ void texture_param_set(int index, int parameter, int value)
 	glGetIntegerv(GL_TEXTURE_2D, &curr_texture);
 	glBindTexture(GL_TEXTURE_2D, texture->handle);
 	glTexParameteri(GL_TEXTURE_2D, parameter, value);
-	renderer_check_glerror("texture:param_set");
+	renderer_check_glerror("texture:set_param");
 	if(curr_texture != 0)
 		glBindTexture(GL_TEXTURE_2D, curr_texture);
 }

src/texture.h

@@ -17,7 +17,7 @@ int  texture_find(const char* name);
 void texture_cleanup(void);
 void texture_bind(int index);
 void texture_unbind(int index);
-void texture_param_set(int index, int parameter, int value);
+void texture_set_param(int index, int parameter, int value);
 int  texture_get_textureunit(int index);
 int  texture_get_texture_handle(int index);
 void texture_inc_refcount(int index);

src/window_system.c

@@ -101,3 +101,8 @@ void window_set_should_close(int should_close)
 {
 	glfwSetWindowShouldClose(active_window, should_close ? GL_TRUE : GL_FALSE);
 }
+
+void window_get_size(int* width, int* height)
+{
+	glfwGetWindowSize(active_window, width, height);
+}

src/window_system.h

@@ -12,6 +12,7 @@ typedef void (*on_mouse_pos) (double, double); // Callback for mouse position
 int         window_init(const char* title, int width, int height);
 void        window_cleanup(void);
 void        window_set_size(int width, int height);
+void        window_get_size(int* width, int* height);
 void        window_poll_events(void);
 void        window_swap_buffers(void);
 int         window_should_close(void);