Added support for resizeable framebuffers and textures. Improved management of textures/renderbuffers attached to framebuffers

README

@@ -54,20 +54,24 @@ _________________
 .. 2.38 TODO Physics/Collision detection in 2d
 .. 2.39 TODO Complete gui integration
 .. 2.40 TODO Allow passsing base path as commandline argument?
-.. 2.41 TODO Validate necessary assets at game launch
-.. 2.42 TODO Variant type
-.. 2.43 TODO Log and debug/stats output in gui
-.. 2.44 TODO Editor
-.. 2.45 TODO Event Subsystem
-.. 2.46 TODO Keybindings for gui?
-.. 2.47 DONE Compile and test on windows
-.. 2.48 TODO Array based string type comptible with cstring(char*)
-.. 2.49 DONE Fix mouse bugs
-.. 2.50 DONE Fix
-.. 2.51 TODO issues with opengl context showing 2.1 only
-.. 2.52 TODO Improve this readme
-.. 2.53 TODO ???
-.. 2.54 TODO Profit!
+.. 2.41 DONE Resizable framebuffers and textures
+.. 2.42 DONE Support for multiple color attachments in framebuffers?
+.. 2.43 TODO Multisampled textures and framebuffers
+.. 2.44 DONE Better way to store and manage textures attached to framebuffers
+.. 2.45 TODO Validate necessary assets at game launch
+.. 2.46 TODO Variant type
+.. 2.47 TODO Log and debug/stats output in gui
+.. 2.48 TODO Editor
+.. 2.49 TODO Event Subsystem
+.. 2.50 TODO Keybindings for gui?
+.. 2.51 DONE Compile and test on windows
+.. 2.52 TODO Array based string type comptible with cstring(char*)
+.. 2.53 DONE Fix mouse bugs
+.. 2.54 DONE Fix
+.. 2.55 TODO issues with opengl context showing 2.1 only
+.. 2.56 TODO Improve this readme
+.. 2.57 TODO ???
+.. 2.58 TODO Profit!
 
 
 1 Project Symmetry
@@ -325,8 +329,7 @@ _________________
 2.39 TODO Complete gui integration
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-  - Font selection
-  - Font atlas proper cleanup
+  x Font selection x Font atlas proper cleanup
   - Decoupled event handling of gui and input if possible
   - Custom rendering for gui
 
@@ -335,63 +338,85 @@ _________________
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 
-2.41 TODO Validate necessary assets at game launch
+2.41 DONE Resizable framebuffers and textures
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+  - State "DONE" from "TODO" [2017-03-16 Thu 22:50]
+
+
+2.42 DONE Support for multiple color attachments in framebuffers?
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+  - State "DONE" from "TODO" [2017-03-16 Thu 22:51]
+
+
+2.43 TODO Multisampled textures and framebuffers
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+2.44 DONE Better way to store and manage textures attached to framebuffers
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+  - State "DONE" from "TODO" [2017-03-16 Thu 22:51]
+
+
+2.45 TODO Validate necessary assets at game launch
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 
-2.42 TODO Variant type
+2.46 TODO Variant type
 ~~~~~~~~~~~~~~~~~~~~~~
 
 
-2.43 TODO Log and debug/stats output in gui
+2.47 TODO Log and debug/stats output in gui
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 
-2.44 TODO Editor
+2.48 TODO Editor
 ~~~~~~~~~~~~~~~~
 
 
-2.45 TODO Event Subsystem
+2.49 TODO Event Subsystem
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 
 
-2.46 TODO Keybindings for gui?
+2.50 TODO Keybindings for gui?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 
-2.47 DONE Compile and test on windows
+2.51 DONE Compile and test on windows
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
   - State "DONE" from "TODO" [2017-03-14 Tue 00:32]
 
 
-2.48 TODO Array based string type comptible with cstring(char*)
+2.52 TODO Array based string type comptible with cstring(char*)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 
-2.49 DONE Fix mouse bugs
+2.53 DONE Fix mouse bugs
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
   - State "DONE" from "TODO" [2017-03-01 Wed 00:45]
 
 
-2.50 DONE Fix
+2.54 DONE Fix
 ~~~~~~~~~~~~~
 
 
-2.51 TODO issues with opengl context showing 2.1 only
+2.55 TODO issues with opengl context showing 2.1 only
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
   - State "DONE" from "TODO" [2017-02-26 Sun 15:39]
 
 
-2.52 TODO Improve this readme
+2.56 TODO Improve this readme
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 
-2.53 TODO ???
+2.57 TODO ???
 ~~~~~~~~~~~~~
 
 
-2.54 TODO Profit!
+2.58 TODO Profit!
 ~~~~~~~~~~~~~~~~~

orgfile.org

@@ -96,11 +96,18 @@ All the code in this repository is under GPLv3, see LICENSE for more information
 ** TODO Fix mouse bugs on windows
 ** TODO Physics/Collision detection in 2d
 ** TODO Complete gui integration
-- Font selection
-- Font atlas proper cleanup
+x Font selection
+x Font atlas proper cleanup
 - Decoupled event handling of gui and input if possible
 - Custom rendering for gui
 ** TODO Allow passsing base path as commandline argument?
+** DONE Resizable framebuffers and textures
+- State "DONE"       from "TODO"       [2017-03-16 Thu 22:50]
+** DONE Support for multiple color attachments in framebuffers?
+- State "DONE"       from "TODO"       [2017-03-16 Thu 22:51]
+** TODO Multisampled textures and framebuffers
+** DONE Better way to store and manage textures attached to framebuffers
+- State "DONE"       from "TODO"       [2017-03-16 Thu 22:51]
 ** TODO Validate necessary assets at game launch
 ** TODO Variant type
 ** TODO Log and debug/stats output in gui

src/camera.c

@@ -127,7 +127,12 @@ void camera_update_proj(struct Camera* camera)
 	camera_update_view_proj(camera);
 }
 
-void camera_attach_fbo(struct Camera* camera, int width, int height, int has_depth, int has_color)
+void camera_attach_fbo(struct Camera* camera,
+					   int            width,
+					   int            height,
+					   int            has_depth,
+					   int            has_color,
+					   int            resizeable)
 {
 	assert(width > 0 && height > 0 && camera);
 	if(camera->fbo != -1)
@@ -135,7 +140,7 @@ void camera_attach_fbo(struct Camera* camera, int width, int height, int has_dep
 		log_error("camera:attach_fbo", "Camera already has fbo attached!");
 		return;
 	}
-	camera->fbo = framebuffer_create(width, height, has_depth, has_color);
+	camera->fbo = framebuffer_create(width, height, has_depth, has_color, resizeable);
 	if(camera->fbo > -1)
 	{
 		char tex_name[128];
@@ -168,9 +173,8 @@ void camera_attach_fbo(struct Camera* camera, int width, int height, int has_dep
 		texture_set_param(camera->depth_tex, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
 		texture_set_param(camera->depth_tex, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
 
-		camera->fbo = framebuffer_create(width, height, 0, 1);
-		framebuffer_set_texture(camera->fbo, camera->render_tex, GL_COLOR_ATTACHMENT0);
-		framebuffer_set_texture(camera->fbo, camera->depth_tex, GL_DEPTH_ATTACHMENT);
+		framebuffer_set_texture(camera->fbo, camera->render_tex, FA_COLOR_ATTACHMENT0);
+		framebuffer_set_texture(camera->fbo, camera->depth_tex, FA_DEPTH_ATTACHMENT);
 	}
 	else
 	{

src/camera.h

@@ -31,7 +31,12 @@ int  camera_create(int node, int width, int height);
 void camera_update_view_proj(struct Camera* camera);
 void camera_update_view(struct Camera* camera);
 void camera_update_proj(struct Camera* camera);
-void camera_attach_fbo(struct Camera* camera, int width, int height, int has_depth, int has_color);
+void camera_attach_fbo(struct Camera* camera,
+					   int            width,
+					   int            height,
+					   int            has_depth,
+					   int            has_color,
+					   int            resizeable);
 void camera_set_primary_viewer(struct Camera* camera);
 
 #endif

src/framebuffer.c

@@ -7,13 +7,17 @@
 
 #include <assert.h>
 
+#define MAX_TEXTURE_ATTACHMENTS 3 /* Pointless define just to avoid VLA's and be compatible with msvc */
+
 struct FBO
 {
 	uint handle;
-	uint renderbuffer;
-	int  texture;
+	uint depth_renderbuffer;
+	uint color_renderbuffer;
+	int  texture_attachments[MAX_TEXTURE_ATTACHMENTS];
 	int  width;
 	int  height;
+	int  resizeable;
 };
 
 struct FBO* fbo_list;
@@ -34,36 +38,50 @@ void framebuffer_cleanup(void)
 	array_free(empty_indices);
 }
 
-int framebuffer_create(int width, int height, int has_depth, int has_color)
+int framebuffer_create(int width, int height, int has_depth, int has_color, int resizeable)
 {
-	int index = -1;
-	GLuint fbo;
-	GLuint renderbuffer;
-		
+	int    index              = -1;
+	GLuint fbo                =  0;
+	GLuint depth_renderbuffer =  0;
+	GLuint color_renderbuffer =  0;
+
 	glGenFramebuffers(1, &fbo);
 	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
-	glGenRenderbuffers(1, &renderbuffer);
-	glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
-	glRenderbufferStorage(GL_RENDERBUFFER,
-						  GL_DEPTH_COMPONENT,
-						  width,
-						  height);
-	renderer_check_glerror("framebuffer:create");
-	glFramebufferRenderbuffer(GL_FRAMEBUFFER,
-							  GL_DEPTH_ATTACHMENT,
-							  GL_RENDERBUFFER,
-							  renderbuffer);
-	renderer_check_glerror("framebuffer:create");
-	if(has_color)
+	if(has_depth)
 	{
-		glDrawBuffer(GL_COLOR_ATTACHMENT0);
+		glGenRenderbuffers(1, &depth_renderbuffer);
+		glBindRenderbuffer(GL_RENDERBUFFER, depth_renderbuffer);
+		glRenderbufferStorage(GL_RENDERBUFFER,
+							  GL_DEPTH_COMPONENT,
+							  width,
+							  height);
+		renderer_check_glerror("framebuffer:create:depth_renderbuffer");
+		glFramebufferRenderbuffer(GL_FRAMEBUFFER,
+								  GL_DEPTH_ATTACHMENT,
+								  GL_RENDERBUFFER,
+								  depth_renderbuffer);
+		renderer_check_glerror("framebuffer:create:depth_renderbuffer");
+		glBindRenderbuffer(GL_RENDERBUFFER, 0);
 	}
-		
-	if(has_depth)
+
+	if(has_color)
 	{
-		glDrawBuffer(GL_NONE);
+		glGenRenderbuffers(1, &color_renderbuffer);
+		glBindRenderbuffer(GL_RENDERBUFFER, color_renderbuffer);
+		glRenderbufferStorage(GL_RENDERBUFFER,
+							  GL_RGBA8,
+							  width,
+							  height);
+		renderer_check_glerror("framebuffer:create:color_renderbuffer");
+		glFramebufferRenderbuffer(GL_FRAMEBUFFER,
+								  GL_COLOR_ATTACHMENT0,
+								  GL_RENDERBUFFER,
+								  color_renderbuffer);
+		renderer_check_glerror("framebuffer:create:color_renderbuffer");
+		glBindRenderbuffer(GL_RENDERBUFFER, 0);
 	}
-		
+
+	glDrawBuffer(has_color ? GL_COLOR_ATTACHMENT0 : GL_NONE);
 	renderer_check_glerror("framebuffer:create");
 	GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
 	if(status != GL_FRAMEBUFFER_COMPLETE)
@@ -85,16 +103,16 @@ int framebuffer_create(int width, int height, int has_depth, int has_color)
 			array_pop(empty_indices);
 		}
 		
-		framebuffer->handle       = fbo;
-		framebuffer->renderbuffer = renderbuffer;
-		framebuffer->texture      = -1;
-		framebuffer->width        = width;
-		framebuffer->height       = height;
+		framebuffer->handle             = fbo;
+		framebuffer->depth_renderbuffer = depth_renderbuffer;
+		framebuffer->color_renderbuffer = color_renderbuffer;
+		framebuffer->width              = width;
+		framebuffer->height             = height;
+		framebuffer->resizeable         = resizeable;
+		for(int i = 0; i < FA_NUM_ATTACHMENTS; i++) framebuffer->texture_attachments[i] = -1;
 		log_message("Framebuffer created successfully");
 	}
 	glBindFramebuffer(GL_FRAMEBUFFER, 0);
-	glBindRenderbuffer(GL_RENDERBUFFER, 0);
-	
 	return index;
 }
 
@@ -102,15 +120,32 @@ void framebuffer_bind(int index)
 {
 	assert(index < array_len(fbo_list) && index > -1);
 	glBindFramebuffer(GL_FRAMEBUFFER, fbo_list[index].handle);
+	/* if(fbo_list[index].color_renderbuffer != 0) */
+	/* 	glDrawBuffer(GL_COLOR_ATTACHMENT0); */
+	/* else */
+	/* 	glDrawBuffer(GL_NONE); */
 }
 
 void framebuffer_remove(int index)
 {
 	assert(index < array_len(fbo_list) && index > -1);
 	struct FBO* fbo = &fbo_list[index];
-	if(fbo->texture != -1) texture_remove(fbo->texture);
-	glDeleteRenderbuffers(1, &fbo->renderbuffer);
+	for(int i = 0; i < FA_NUM_ATTACHMENTS; i++)
+	{
+		if(fbo->texture_attachments[i] != -1)
+		{
+			texture_remove(fbo->texture_attachments[i]);
+			fbo->texture_attachments[i] = -1;
+		}
+	}
+	if(fbo->depth_renderbuffer != 0) glDeleteRenderbuffers(1, &fbo->depth_renderbuffer);
+	if(fbo->color_renderbuffer != 0) glDeleteRenderbuffers(1, &fbo->color_renderbuffer);
 	glDeleteFramebuffers(1, &fbo->handle);
+	fbo->color_renderbuffer =  0;
+	fbo->depth_renderbuffer =  0;
+	fbo->handle             =  0;
+	fbo->width              = -1;
+	fbo->height             = -1;
 }
 
 void framebuffer_unbind(void)
@@ -124,40 +159,55 @@ int framebuffer_get_width(int index)
 	return fbo_list[index].width;
 }
 
-int  framebuffer_get_height(int index)
+int framebuffer_get_height(int index)
 {
 	assert(index < array_len(fbo_list) && index > -1);
 	return fbo_list[index].height;
 }
 
-void framebuffer_set_texture(int index, int texture, int attachment)
+void framebuffer_set_texture(int index, int texture, enum Framebuffer_Attachment attachment)
 {
 	assert(index < array_len(fbo_list) && index > -1);
+	GLenum gl_attachment = -1;
+	switch(attachment)
+	{
+	case     FA_COLOR_ATTACHMENT0: gl_attachment = GL_COLOR_ATTACHMENT0; break;
+	case     FA_DEPTH_ATTACHMENT:  gl_attachment = GL_DEPTH_ATTACHMENT;  break;
+	default: log_error("framebuffer:set_texture", "Invalid attachment type"); return;
+	};
+
+	struct FBO* fbo     = &fbo_list[index];
+	int current_texture = fbo->texture_attachments[attachment];
+	if(current_texture != -1)
+	{
+		texture_remove(current_texture);
+		fbo->texture_attachments[attachment] = -1;
+	}
+
+	if(texture == -1) return;
+	
 	GLint current_fbo = 0;
 	glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &current_fbo);
 	renderer_check_glerror("framebuffer:set_texture:glGet");
 	framebuffer_bind(index);
 	glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER,
-						   attachment,
+						   gl_attachment,
 						   GL_TEXTURE_2D,
 						   texture_get_texture_handle(texture),
 						   0);
-	/* if(!renderer_check_glerror("framebuffer:set_texture:glFramebuffertexture")) */
-	/* { */
-	/* 	int current_fbo_tex = fbo_list[index].texture; */
-	/* 	if(current_fbo_tex > -1) */
-	/* 		texture_remove(current_fbo_tex); */
-
-	/* 	fbo_list[index].texture = texture; */
-	/* 	texture_inc_refcount(texture); */
-	/* } */
+	renderer_check_glerror("framebuffer:set_texture:glFramebuffertexture2d");
+	fbo->texture_attachments[attachment] = texture;
+	if(attachment == FA_COLOR_ATTACHMENT0) glDrawBuffer(GL_COLOR_ATTACHMENT0);
 	glBindFramebuffer(GL_FRAMEBUFFER, current_fbo);
 }
 
-int framebuffer_get_texture(int index)
+int framebuffer_get_texture(int index, enum Framebuffer_Attachment attachment)
 {
-	assert(index < array_len(fbo_list) && index > -1);
-	return fbo_list[index].texture;
+	assert(index < array_len(fbo_list) &&
+		   index > -1 &&
+		   attachment < FA_NUM_ATTACHMENTS &&
+		   (int)attachment > -1);
+	return fbo_list[index].texture_attachments[attachment];
 }
 
 uint framebuffer_get_gl_handle(int index)
@@ -165,3 +215,86 @@ uint framebuffer_get_gl_handle(int index)
 	assert(index < array_len(fbo_list) && index > -1);
 	return fbo_list[index].handle;
 }
+
+void framebuffer_resize(int index, int width, int height)
+{
+	assert(index > -1 && index < array_len(fbo_list));
+	width  -= (width % 2);
+	height -= (height % 2);
+	GLint current_fbo = 0;
+	glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING, &current_fbo);
+	renderer_check_glerror("framebuffer:resize:glGet");
+	struct FBO* fbo = &fbo_list[index];
+	if(!fbo->resizeable) return;
+	framebuffer_bind(index);
+	if(fbo->depth_renderbuffer != 0)
+	{
+		glBindRenderbuffer(GL_RENDERBUFFER, fbo->depth_renderbuffer);
+		glRenderbufferStorage(GL_RENDERBUFFER,
+							  GL_DEPTH_COMPONENT,
+							  width,
+							  height);
+		renderer_check_glerror("framebuffer:resize:depth_renderbuffer");
+		glFramebufferRenderbuffer(GL_FRAMEBUFFER,
+								  GL_DEPTH_ATTACHMENT,
+								  GL_RENDERBUFFER,
+								  fbo->depth_renderbuffer);
+		glBindRenderbuffer(GL_RENDERBUFFER, 0);
+	}
+
+	if(fbo->color_renderbuffer != 0)
+	{
+		glBindRenderbuffer(GL_RENDERBUFFER, fbo->color_renderbuffer);
+		glRenderbufferStorage(GL_RENDERBUFFER,
+							  GL_RGBA8,
+							  width,
+							  height);
+		renderer_check_glerror("framebuffer:resize:color_renderbuffer");
+		glFramebufferRenderbuffer(GL_FRAMEBUFFER,
+								  GL_COLOR_ATTACHMENT0,
+								  GL_RENDERBUFFER,
+								  fbo->color_renderbuffer);
+		glBindRenderbuffer(GL_RENDERBUFFER, 0);
+	}
+
+	for(int i = 0; i < FA_NUM_ATTACHMENTS; i++)
+	{
+		if(fbo->texture_attachments[i] != -1)
+		{
+			int texture = fbo->texture_attachments[i];
+			GLenum gl_attachment = -1;
+			switch(i)
+			{
+			case     FA_COLOR_ATTACHMENT0: gl_attachment = GL_COLOR_ATTACHMENT0; break;
+			case     FA_DEPTH_ATTACHMENT:  gl_attachment = GL_DEPTH_ATTACHMENT;  break;
+			default: log_error("framebuffer:resize", "Invalid attachment type"); continue;
+			};
+			
+			texture_resize(texture, width, height, NULL);
+			glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER,
+								   gl_attachment,
+								   GL_TEXTURE_2D,
+								   texture_get_texture_handle(texture),
+								   0);
+		}
+	}
+	
+	glBindFramebuffer(GL_FRAMEBUFFER, current_fbo);
+	fbo->width  = width;
+	fbo->height = height;
+	log_message("Resized framebuffer to %dx%d", width, height);
+}
+
+void framebuffer_resize_all(int width, int height)
+{
+	for(int i = 0; i < array_len(fbo_list); i++)
+	{
+		if(fbo_list[i].resizeable) framebuffer_resize(i, width, height);
+	}
+}
+
+void framebuffer_resizeable_set(int index, int resizeable)
+{
+	assert(index > -1 && index < array_len(fbo_list));
+	fbo_list[index].resizeable = resizeable ? 1 : 0;
+}

src/framebuffer.h

@@ -3,16 +3,26 @@
 
 #include "num_types.h"
 
+enum Framebuffer_Attachment
+{
+	FA_COLOR_ATTACHMENT0 = 0,
+	FA_DEPTH_ATTACHMENT,
+	FA_NUM_ATTACHMENTS
+};
+
 void framebuffer_init(void);
 void framebuffer_cleanup(void);
-int  framebuffer_create(int width, int height, int has_depth, int has_color);
+int  framebuffer_create(int width, int height, int has_depth, int has_color, int resizeable);
 void framebuffer_bind(int index);
 void framebuffer_remove(int index);
 void framebuffer_unbind(void);
 int  framebuffer_get_width(int index);
 int  framebuffer_get_height(int index);
-void framebuffer_set_texture(int index, int texture, int attachment);
-int  framebuffer_get_texture(int index);
+void framebuffer_set_texture(int index, int texture, enum Framebuffer_Attachment attachment);
+int  framebuffer_get_texture(int index, enum Framebuffer_Attachment attachment);
 uint framebuffer_get_gl_handle(int index);
+void framebuffer_resize(int index, int width, int height);
+void framebuffer_resize_all(int width, int height);
+void framebuffer_resizeable_set(int index, int resizeable);
 
 #endif

src/game.c

@@ -102,7 +102,7 @@ void scene_setup(void)
 	render_width = 1024;
 	render_height = 768;
 	struct Camera* camera = entity_component_add(player, C_CAMERA, render_width, render_height);
-	camera_attach_fbo(camera, render_width, render_height, 1, 1);
+	camera_attach_fbo(camera, render_width, render_height, 1, 0, 1);
 	vec4_fill(&camera->clear_color, 0.3f, 0.6f, 0.9f, 1.0f);
 	camera_set_primary_viewer(camera);
 	
@@ -151,16 +151,16 @@ void scene_setup(void)
 	transform_set_position(ground_tran, &pos);
 	transform_scale(ground_tran, &scale_ground);
 
-	/* struct Entity* screen = scene_add_new("Screen", NULL); */
-	/* struct Model* screen_model = entity_component_add(screen, C_MODEL, NULL, NULL); */
-	/* screen_model->geometry_index = geom_find("Quad"); */
-	/* struct Entity* screen_camera = scene_add_as_child("Screen_Camera", NULL, screen->node); */
-	/* struct Transform* screen_camera_tran = entity_component_get(screen_camera, C_TRANSFORM); */
-	/* transform_rotate(screen_camera_tran, &UNIT_Y, 180.f, TS_WORLD); */
-	/* struct Camera* cam = entity_component_add(screen_camera, C_CAMERA, 50, 50); */
-	/* camera_attach_fbo(cam, 50, 50, 1, 1); */
-	/* model_set_material_param(screen_model, "diffuse_color", &color); */
-	/* model_set_material_param(screen_model, "diffuse_texture", &cam->render_tex); */
+	struct Entity* screen = scene_add_new("Screen", NULL);
+	struct Model* screen_model = entity_component_add(screen, C_MODEL, NULL, NULL);
+	screen_model->geometry_index = geom_find("Quad");
+	struct Entity* screen_camera = scene_add_as_child("Screen_Camera", NULL, screen->node);
+	struct Transform* screen_camera_tran = entity_component_get(screen_camera, C_TRANSFORM);
+	transform_rotate(screen_camera_tran, &UNIT_Y, 180.f, TS_WORLD);
+	struct Camera* cam = entity_component_add(screen_camera, C_CAMERA, 50, 50);
+	camera_attach_fbo(cam, 128, 128, 1, 1, 0);
+	model_set_material_param(screen_model, "diffuse_color", &color);
+	model_set_material_param(screen_model, "diffuse_texture", &cam->render_tex);
 
 	const int MAX_LIGHTS = 3;
 	for(int i = 0; i < MAX_LIGHTS; i++)
@@ -274,7 +274,7 @@ void debug(float dt)
 	if(offset.x != 0 || offset.y != 0 || offset.z != 0)
 	{
 		transform_translate(transform, &offset, TS_LOCAL);
- 		log_message("Position : %s", tostr_vec3(&transform->position));
+ 		//log_message("Position : %s", tostr_vec3(&transform->position));
 	}
 
 	if(input_key_state_get(KEY_SPACE, KS_PRESSED))

src/model.c

@@ -20,8 +20,7 @@
 #define MAX_NAME_LEN 64
 
 static struct Model* model_list;
-static int* empty_indices;
-static int use_blinn = 1;
+static        int*   empty_indices;
 
 struct Model* model_get(int index)
 {
@@ -35,7 +34,7 @@ struct Model* model_get(int index)
 
 void model_init(void)
 {
-	model_list = array_new(struct Model);
+	model_list    = array_new(struct Model);
 	empty_indices = array_new(int);
 }
 

src/platform.c

@@ -223,9 +223,8 @@ void platform_poll_events(int* out_quit)
 		}
 		case SDL_WINDOWEVENT:
 		{
-			if(event.window.type == SDL_WINDOWEVENT_RESIZED)
+			if(event.window.event == SDL_WINDOWEVENT_RESIZED)
 			{
-				/* Notify renderer here */
 				platform_state->on_windowresize_func(event.window.data1, event.window.data2);
 			}
 		}

src/renderer.c

@@ -23,6 +23,9 @@ static int quad_geo = -1;
 static int composition_shader = -1;
 static struct Render_Settings settings;
 
+#define MAX_GUI_VERTEX_MEMORY  512 * 1024
+#define MAX_GUI_ELEMENT_MEMORY 128 * 1024
+
 void on_framebuffer_size_change(int width, int height);
 
 void renderer_init(void)
@@ -39,16 +42,16 @@ void renderer_init(void)
 	settings.fog.max_dist = 150.f;
 	vec3_fill(&settings.fog.color, 60.f/255.f, 60.f/255.f, 75.f/255.f);
 	vec3_fill(&settings.ambient_light, 0.1f, 0.1f, 0.12f);
-	settings.max_gui_vertex_memory =  512 * 1024;
-	settings.max_gui_element_memory = 128 * 1024;
+	settings.max_gui_vertex_memory  = MAX_GUI_VERTEX_MEMORY;
+	settings.max_gui_element_memory = MAX_GUI_ELEMENT_MEMORY;
 
 	gui_init();
 	
 	/* 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);
+	vec2* uvs      = array_new(vec2);
+	vec3* normals  = array_new(vec3);
+	uint* indices  = array_new(uint);
 	vec3 temp_v3; 
 	vec2 temp_v2;
 	/* Vertices */
@@ -103,9 +106,9 @@ void renderer_init(void)
 	texture_set_param(def_depth_tex, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
 	texture_set_param(def_depth_tex, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
 
-	def_fbo = framebuffer_create(width, height, 1, 1);
-	framebuffer_set_texture(def_fbo, def_albedo_tex, GL_COLOR_ATTACHMENT0);
-	framebuffer_set_texture(def_fbo, def_depth_tex, GL_DEPTH_ATTACHMENT);
+	def_fbo = framebuffer_create(width, height, 1, 0, 1);
+	framebuffer_set_texture(def_fbo, def_albedo_tex, FA_COLOR_ATTACHMENT0);
+	/* framebuffer_set_texture(def_fbo, def_depth_tex, GL_DEPTH_ATTACHMENT); */
 	composition_shader = shader_create("fbo.vert", "fbo.frag");
 }
 
@@ -118,11 +121,11 @@ void renderer_draw(void)
 		if(camera->node < 0)
 			continue;
 
+		/* if(camera->fbo == -1) continue; */
 		int fbo = camera->fbo == -1 ? def_fbo : camera->fbo;
 		framebuffer_bind(fbo);
 		{
 			glViewport(0, 0, framebuffer_get_width(fbo), framebuffer_get_height(fbo));
-			glDrawBuffer(GL_COLOR_ATTACHMENT0);
 			glEnable(GL_DEPTH_TEST);
 			glDepthFunc(GL_LEQUAL);
 			glClearColor(camera->clear_color.x,
@@ -135,7 +138,27 @@ void renderer_draw(void)
 			model_render_all(camera);
 		}
 		framebuffer_unbind();
+		glDisable(GL_DEPTH_TEST);
+		glDisable(GL_CULL_FACE);
 	}
+	
+	/* struct Camera* camera = camera_get_primary(); */
+	/* { */
+	/* 	int width, height; */
+	/* 	struct Game_State* game_state = game_state_get(); */
+	/* 	window_get_size(game_state->window, &width, &height); */
+	/* 	glViewport(0, 0, width, height); */
+	/* 	glEnable(GL_DEPTH_TEST); */
+	/* 	glDepthFunc(GL_LEQUAL); */
+	/* 	glClearColor(camera->clear_color.x, */
+	/* 				 camera->clear_color.y, */
+	/* 				 camera->clear_color.z, */
+	/* 				 camera->clear_color.w); */
+	/* 	glEnable(GL_CULL_FACE ); */
+	/* 	glCullFace(GL_BACK); */
+	/* 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); */
+	/* 	model_render_all(camera); */
+	/* } */
 
 	int width, height;
 	struct Game_State* game_state = game_state_get();
@@ -147,12 +170,10 @@ void renderer_draw(void)
 	int final_render_tex = active_camera->render_tex == -1 ? def_albedo_tex : active_camera->render_tex;
 	texture_bind(final_render_tex);
 	geom_render(quad_geo);
-	shader_unbind();
 	texture_unbind(final_render_tex);
+	shader_unbind();
 
-	renderer_check_glerror("Before Gui Render");
 	gui_render(NK_ANTI_ALIASING_ON, settings.max_gui_vertex_memory, settings.max_gui_element_memory);
-	renderer_check_glerror("After Gui Render");
 }
 
 void renderer_cleanup(void)
@@ -167,10 +188,12 @@ void renderer_cleanup(void)
 void on_framebuffer_size_change(int width, int height)
 {
 	glViewport(0, 0, width, height);
-	struct Camera* camera = camera_get(0);
+	struct Camera* camera = camera_get(0); /* TODO: This is an ugly hack, remove it as soon as possible */
 	float aspect = (float)width / (float)height;
 	camera->aspect_ratio = aspect > 0.f ? aspect : 4.f / 3.f;
 	camera_update_proj(camera);
+	//framebuffer_resize(def_fbo, width, height);
+	framebuffer_resize_all(width, height);
 }
 
 void renderer_set_clearcolor(float red, float green, float blue, float alpha)

src/texture.c

@@ -13,10 +13,13 @@
 
 struct Texture
 {
-	char* name;
-	uint  handle;
-	int   ref_count;
-	int   texture_unit;
+	char*  name;
+	uint   handle;
+	int    ref_count;
+	int    texture_unit;
+	GLenum format;
+	GLint  internal_format;
+	GLenum type;
 };
 
 #pragma pack(push, 1)
@@ -42,10 +45,10 @@ static int* empty_indices;
 
 #define MAX_PIXEL_BYTES 5
 
-static int  load_img(FILE* file, GLubyte** image_data, int* width, int* height, int* fmt, int* internal_fmt);
+static int  load_img(FILE* file, GLubyte** image_data, int* width, int* height, int* fmt, int* internal_format);
 static void debug_write_tga(struct Tga_Header* header, GLubyte* image_data);
 static void copy_tga_pixel(GLubyte* source, GLubyte* dest, size_t bytes_per_pixel);
-static int  create_gl_texture(uint* out_handle, int width, int height, int format, int int_fmt, int type, const void* data);
+static int  create_gl_texture(uint* out_handle, int width, int height, int format, int internal_format, int type, const void* data);
 
 void texture_init(void)
 {
@@ -64,22 +67,21 @@ int texture_create_from_file(const char* filename, int texture_unit)
 		return index;
 	}
 	/* If texture not already loaded then try to load it */
-	char* full_path = str_new("textures/");
-	full_path = str_concat(full_path, filename);
+	char* full_path = str_new("textures/%s", filename);
 	FILE* file = io_file_open(full_path, "rb");
 	int img_load_success = -1;
 	
 	if(file)
 	{
 		/* Load texture here */
-		int width, height, int_fmt, fmt;
+		int width, height, internal_format, fmt;
 		GLubyte* img_data = NULL;
-		width = height = int_fmt = fmt = -1;
-		img_load_success = load_img(file, &img_data, &width, &height, &fmt, &int_fmt);
+		width = height = internal_format = fmt = -1;
+		img_load_success = load_img(file, &img_data, &width, &height, &fmt, &internal_format);
 
 		if(img_load_success)
 		{
-			index = texture_create(filename, texture_unit, width, height, fmt, int_fmt, GL_UNSIGNED_BYTE, img_data);
+			index = texture_create(filename, texture_unit, width, height, fmt, internal_format, GL_UNSIGNED_BYTE, img_data);
 			if(index > -1)
 			{
 				texture_set_param(index, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
@@ -115,9 +117,12 @@ void texture_remove(int index)
 			{	
 				glDeleteTextures(1, &texture->handle);
 				if(texture->name) free(texture->name);
-				texture->name = NULL;
-				texture->ref_count = -1;
-				texture->texture_unit = -1;
+				texture->name            = NULL;
+				texture->ref_count       = -1;
+				texture->texture_unit    = -1;
+				texture->format          = -1;
+				texture->internal_format = -1;
+				texture->type            = -1;
 				array_push(empty_indices, index, int);			
 			}
 		}
@@ -162,7 +167,7 @@ void texture_unbind(int index)
 	glBindTexture(GL_TEXTURE_2D, 0);
 }
 
-int load_img(FILE* file, GLubyte** image_data, int* width, int* height, int* fmt, int* internal_fmt)
+int load_img(FILE* file, GLubyte** image_data, int* width, int* height, int* fmt, int* internal_format)
 {	
 	int success = 0;
 	struct Tga_Header header; 
@@ -278,13 +283,12 @@ int load_img(FILE* file, GLubyte** image_data, int* width, int* height, int* fmt
 					 }
 				 }
 			 }
-			 
 			 //debug_write_tga(&header, *image_data);
-			 *height       = header.height;
-			 *width        = header.width;
-			 *fmt          = bytes_per_pixel == 3 ? GL_RGB : GL_RGBA;
-			 *internal_fmt = *fmt;
-			 success       = 1;
+			 *height          = header.height;
+			 *width           = header.width;
+			 *fmt             = bytes_per_pixel == 3 ? GL_RGB : GL_RGBA;
+			 *internal_format = *fmt;
+			 success          = 1;
 		 }
 	 }
 	 else
@@ -372,14 +376,14 @@ int texture_create(const char* name,
 				   int   	   width,
 				   int   	   height,
 				   int   	   format,
-				   int   	   int_fmt,
+				   int   	   internal_format,
 				   int   	   type,
 				   const void* data)
 {
 	assert(name && texture_unit > -1 && texture_unit <= TU_SHADOWMAP4);
-	int index = -1;
+	int index   = -1;
 	uint handle = 0;
-	int success = create_gl_texture(&handle, width, height, format, int_fmt, type, data);
+	int success = create_gl_texture(&handle, width, height, format, internal_format, type, data);
 	if(success)
 	{
 		struct Texture* new_tex = NULL;
@@ -392,17 +396,26 @@ int texture_create(const char* name,
 		else
 		{
 			new_tex = array_grow(texture_list, struct Texture);
-			index = array_len(texture_list) - 1;
+			index   = array_len(texture_list) - 1;
 		}
-		new_tex->name = str_new(name);
-		new_tex->handle = handle;
-		new_tex->ref_count = 1;
-		new_tex->texture_unit = texture_unit;
+		new_tex->name            = str_new(name);
+		new_tex->handle          = handle;
+		new_tex->ref_count       = 1;
+		new_tex->texture_unit    = texture_unit;
+		new_tex->format          = format;
+		new_tex->internal_format = internal_format;
+		new_tex->type            = type;
 	}
 	return index;
 }
 
-int create_gl_texture(uint* out_handle, int width, int height, int format, int int_fmt, int type, const void* data)
+int create_gl_texture(uint*       out_handle,
+					  int         width,
+					  int         height,
+					  int         format,
+					  int         internal_format,
+					  int         type,
+					  const void* data)
 {
 	int success = 1;
 	glGenTextures(1, out_handle);
@@ -413,10 +426,35 @@ int create_gl_texture(uint* out_handle, int width, int height, int format, int i
 	else
 	{
 		glBindTexture(GL_TEXTURE_2D, *out_handle);
-		glTexImage2D(GL_TEXTURE_2D, 0, int_fmt, width, height, 0, format, type, data);
+		glTexImage2D(GL_TEXTURE_2D, 0, internal_format, width, height, 0, format, type, data);
 		if(renderer_check_glerror("texture:create_gl_texture:glTexImage2d"))
 			success = 0;
 		glBindTexture(GL_TEXTURE_2D, 0);
 	}
 	return success;
 }
+
+void texture_resize(int index, int width, int height, const void* data)
+{
+	assert(index > -1 && index < array_len(texture_list));
+	width  -= (width % 2);
+	height -= (height % 2);
+	struct Texture* texture = &texture_list[index];
+
+	GLint curr_texture = 0;
+	glGetIntegerv(GL_TEXTURE_BINDING_2D, &curr_texture);
+	renderer_check_glerror("texture:set_param:glGetIntegerv");
+	glBindTexture(GL_TEXTURE_2D, texture->handle);
+	renderer_check_glerror("texture:set_param:glBindTexture");
+	glTexImage2D(GL_TEXTURE_2D,
+				 0,
+				 texture->internal_format,
+				 width,
+				 height,
+				 0,
+				 texture->format,
+				 texture->type,
+				 data);
+	if(curr_texture != 0)
+		glBindTexture(GL_TEXTURE_2D, curr_texture);
+}

src/texture.h

@@ -27,8 +27,9 @@ int  texture_create(const char* name,
 					int         width,
 					int         height,
 					int         format,
-					int         int_fmt,
+					int         internal_format,
 					int         type,
 					const void* data);
+void texture_resize(int index, int width, int height, const void* data);
 
 #endif