graphics api abstraction

[demo] / src / main.cc

diff --git a/src/main.cc b/src/main.cc
index 4ba8df3..6d7f4e7 100644 (file)
--- a/src/main.cc
+++ b/src/main.cc
@@ -1,3 +1,5 @@
+#include <GL/glew.h>
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -5,6 +7,7 @@
 
 #include <gmath/gmath.h>
 
+#include "gfxapi.h"
 #include "global.h"
 
 /* TODO: fix those */
@@ -13,14 +16,13 @@
 #include "object.h"
 #include "renderer.h"
 #include "scene.h"
-#include "shader_manager.h"
 
 #include "opengl/opengl.h"
 #include "vulkan/vk.h"
 
 /* static functions */
 
-static bool init();
+static bool init(Gfx_API api);
 static void cleanup();
 static void display();
 
@@ -33,7 +35,6 @@ static void clbk_reshape(GLFWwindow *win, int width, int height);
 
 /* global variables */
 
-bool use_vulkan = false;
 Mat4 mprojection;
 
 GLFWwindow *win;
@@ -47,27 +48,38 @@ float dist = 4;
 ShaderManager *sdr_man;
 
 /* variables */
+
 static float aspect;
-static Scene *scene;
 static OrbitCamera *camera;
-static Renderer *rdefault; // default renderer
+
+static Scene *scene_cow;
+static Renderer *rcow;
+
+static Scene *scene_ground;
+static Renderer *rground; // default renderer
+
+/* *** */
 
 int main(int argc, char **argv)
 {
+       Gfx_API api;
+
        for(int i=0; i<argc; ++i) {
                if(strcmp(argv[i], "-opengl") == 0) {
+                       api = GFX_GL;
                        printf("Backend: OpenGL.\n");
                }
                else if(strcmp(argv[i], "-vulkan") == 0) {
-                       use_vulkan = true;
+                       api = GFX_VK;
                        printf("Backend: Vulkan.\n");
                }
                else {
+                       api = GFX_GL;
                        printf("No backend specified. Using OpenGL.\n");
                }
        }
 
-       if(!init()) {
+       if(!init(api)) {
                fprintf(stderr, "Failed to initialize program.\n");
                return 1;
        }
@@ -92,44 +104,53 @@ int main(int argc, char **argv)
        return 0;
 }
 
-static bool init()
+static bool init(Gfx_API api)
 {
-       if(use_vulkan) {
-               if(!init_vulkan())
-                       return false;
-       }
-       else {
-               if(!init_opengl())
-                       return false;
-       }
+       if(!gfx_init(api))
+               return false;
 
        sdr_man = new ShaderManager;
 
        camera = new OrbitCamera;
        camera->set_orbit_params(phi, theta, dist);
 
-       scene = new Scene;
-       if(!scene->load("data/spot/spot.obj")) {
-               fprintf(stderr, "Failed to load scene.\n");
+       scene_ground = new Scene;
+       if(!scene_ground->load("data/ground.obj")) {
+               fprintf(stderr, "Failed to load scene: ground.obj.\n");
+               return false;
+       }
+
+       scene_cow = new Scene;
+       if(!scene_cow->load("data/spot/spot.obj")) {
+               fprintf(stderr, "Failed to load scene: spot.obj.\n");
                return false;
        }
 
-       rdefault = new Renderer;
-       rdefault->camera = camera;
-       rdefault->scene = scene;
+       rground = new Renderer;
+       rground->camera = camera;
+       rground->scene = scene_ground;
 
-       if(!rdefault->create()) {
+       if(!rground->create()) {
                fprintf(stderr, "Failed to create default renderer.\n");
                return false;
        }
 
+       rcow = new Renderer;
+       rcow->camera = camera;
+       rcow->scene = scene_cow;
+
+       if(!rcow->create()) {
+               fprintf(stderr, "Failed to create renderer for cows.\n");
+               return false;
+       }
+
 // TODO delete: debugging
-       for(size_t i=0; i<scene->objects.size(); ++i) {
+       for(size_t i=0; i<scene_ground->objects.size(); ++i) {
                printf("object: %d\n", (int)i);
-               printf("mesh: %s\n", scene->objects[i]->mesh->name.c_str());
-               printf("material: %s\n", scene->objects[i]->material->name.c_str());
+               printf("mesh: %s\n", scene_ground->objects[i]->mesh->name.c_str());
+               printf("material: %s\n", scene_ground->objects[i]->material->name.c_str());
                printf("transform:\n");
-               scene->objects[i]->transform.print();
+               scene_ground->objects[i]->transform.print();
        }
        return true;
 }
@@ -138,15 +159,14 @@ static void cleanup()
 {
        delete sdr_man;
        delete camera;
-       delete scene;
-       delete rdefault;
 
-       if(use_vulkan) {
-               cleanup_vulkan();
-       }
-       else {
-               cleanup_opengl();
-       }
+       delete scene_cow;
+       delete rcow;
+
+       delete scene_ground;
+       delete rground;
+
+       gfx_cleanup();
 }
 
 static void clbk_key(GLFWwindow *win, int key, int scancode, int action, int mods)
@@ -178,7 +198,7 @@ static void clbk_motion(GLFWwindow *win, double x, double y)
        }
 
        if(button[1]) {
-               dist += dy;
+               dist += dy * 0.1;
                if(dist < 0.0) {
                        dist = 0.0;
                }
@@ -193,15 +213,9 @@ static void clbk_mouse(GLFWwindow *win, int bn, int action, int mods)
 
 static void clbk_reshape(GLFWwindow *win, int width, int height)
 {
-       if(use_vulkan) {
-               //TODO
-               return;
-       }
-       else {
-               glViewport(0, 0, width, height);
-               aspect = (float)width / (float)height;
-               mprojection = calc_projection_matrix(45, aspect, 0.5, 1000.0);
-       }
+       gfx_viewport(0, 0, width, height);
+       aspect = (float)width / (float)height;
+       mprojection = calc_projection_matrix(45, aspect, 0.5, 1000.0);
 
        win_h = height;
        win_w = width;
@@ -210,5 +224,9 @@ static void clbk_reshape(GLFWwindow *win, int width, int height)
 static void display()
 {
        camera->set_orbit_params(phi, theta, dist);
-       rdefault->draw();
+
+       gfx_clear(0.76, 0.3, 0.43);
+
+       rground->draw();
+       rcow->draw();
 }
\ No newline at end of file