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https://github.com/mapmapteam/mapmap.git
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Add prototype with glfw
This commit is contained in:
Alexandre Quessy
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#!/bin/bash
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DEPS=glfw3 glu gl
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CC=gcc
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CC_FLAGS=-O0 -g `pkg-config --cflags --libs $(DEPS)` -lSOIL
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EXEC=run
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SOURCES=$(wildcard *.c)
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OBJECTS=$(SOURCES:.c=.o)
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all: run
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$(EXEC): $(OBJECTS)
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$(CC) $(OBJECTS) $(CC_FLAGS) -o $(EXEC)
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%.o: %.c
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$(CC) -c $(CC_FLAGS) $< -o $@
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clean:
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rm -f $(EXEC) $(OBJECTS)
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@@ -0,0 +1 @@
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sudo yum install -y SOIL-devel glfw-devel
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Binary file not shown.
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After Width: | Height: | Size: 13 KiB |
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//========================================================================
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// Simple GLFW example
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// Copyright (c) Camilla Berglund <elmindreda@elmindreda.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required. //
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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//! [code]
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#include <GL/glfw3.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <SOIL/SOIL.h>
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typedef struct _Quad
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{
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int x1;
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int x2;
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int x3;
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int x4;
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int y1;
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int y2;
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int y3;
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int y4;
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} Quad;
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static Quad src;
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static Quad dst;
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static void error_callback(int error, const char* description)
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{
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fputs(description, stderr);
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}
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// static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
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// {
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// if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
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// glfwSetWindowShouldClose(window, GL_TRUE);
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// }
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//
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static void
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move_point (int index, int x, int y)
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{
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printf ("move_point (index=%d, x=%d, y=%d)\n", index, x, y);
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switch (index)
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{
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case 1:
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src.x1 += x;
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src.y1 += y;
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break;
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case 2:
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src.x2 += x;
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src.y2 += y;
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break;
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case 3:
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src.x3 += x;
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src.y3 += y;
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break;
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case 4:
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src.x4 += x;
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src.y4 += y;
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break;
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case 5:
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dst.x1 += x;
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dst.y1 += y;
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break;
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case 6:
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dst.x2 += x;
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dst.y2 += y;
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break;
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case 7:
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dst.x3 += x;
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dst.y3 += y;
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break;
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case 8:
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dst.x4 += x;
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dst.y4 += y;
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break;
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}
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}
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static void
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key_callback (GLFWwindow *window, int key, int scancode, int action, int mods)
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{
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static int current = 0;
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//printf ("key_callback (window=%p, key=%d, scancode=%d, action=%d, mods=%d)\n",
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// window, key, scancode, action, mods);
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if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
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glfwSetWindowShouldClose(window, GL_TRUE);
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else if (key == GLFW_KEY_TAB && action == GLFW_PRESS)
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{
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current = (current + 1) % 8;
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printf ("Current = %d\n", current);
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}
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else if (action == GLFW_PRESS || action == GLFW_REPEAT)
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{
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if (key == GLFW_KEY_UP)
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move_point (current + 1, 0, 1);
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else if (key == GLFW_KEY_DOWN)
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move_point (current + 1, 0, -1);
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else if (key == GLFW_KEY_LEFT)
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move_point (current + 1, -1, 0);
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else if (key == GLFW_KEY_RIGHT)
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move_point (current + 1, 1, 0);
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else
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printf ("Unhandled key = %d\n", key);
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}
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}
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GLuint load_image (const char *imagepath)
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{
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int width, height;
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GLuint textureID = 0;
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unsigned char * data =
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SOIL_load_image(imagepath, &width, &height, 0, SOIL_LOAD_RGB );
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textureID = SOIL_create_OGL_texture (
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data, width, height, 3, textureID, 0);
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// TODO: free data?
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return textureID;
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}
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int main(void)
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{
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GLFWwindow* window;
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GLuint texture;
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const int wrap = 1;
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const float image_width = 320;
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const float image_height = 240;
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//source
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src.x1 = 0;
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src.y1 = 0;
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src.x2 = 320;
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src.y2 = 0;
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src.x3 = 320;
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src.y3 = 240;
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src.x4 = 0;
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src.y4 = 240;
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//destination
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dst.x1 = 0;
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dst.y1 = 0;
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dst.x2 = 320;
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dst.y2 = 0;
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dst.x3 = 320;
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dst.y3 = 240;
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dst.x4 = 0;
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dst.y4 = 240;
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glfwSetErrorCallback (error_callback);
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if (! glfwInit ())
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exit(EXIT_FAILURE);
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window = glfwCreateWindow (640, 480, "MapMap prototype", NULL, NULL);
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if (! window)
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{
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glfwTerminate ();
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exit (EXIT_FAILURE);
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}
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glfwMakeContextCurrent (window);
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texture = load_image ("example.png");
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glfwSetKeyCallback (window, (GLFWkeyfun) key_callback);
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while (! glfwWindowShouldClose (window))
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{
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float ratio;
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int width, height;
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//glfwGetFramebufferSize(window, &width, &height);
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// XXX aalex I commented the line above and added the two lines below
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width = 640;
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height = 480;
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ratio = width / (float) height;
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glViewport (0, 0, width, height);
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glClear (GL_COLOR_BUFFER_BIT);
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glMatrixMode (GL_PROJECTION);
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glLoadIdentity ();
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glOrtho (-ratio, ratio, -1.f, 1.f, 1.f, -1.f);
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glMatrixMode (GL_MODELVIEW);
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glLoadIdentity ();
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// DRAW THE TEXTURE
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glPushMatrix ();
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glDisable (GL_LIGHTING);
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glColor3f (1, 1, 1);
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glEnable (GL_TEXTURE_2D);
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glBindTexture (GL_TEXTURE_2D, texture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glBegin (GL_QUADS);
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glTexCoord2f (src.x1 / image_width, src.y1 / image_height);
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glVertex3f (dst.x1 / image_width, dst.y1 / image_height, 0);
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glTexCoord2f (src.x2 / image_width, src.y2 / image_height);
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glVertex3f (dst.x2 / image_width, dst.y2 / image_height, 0);
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glTexCoord2f (src.x3 / image_width, src.y3 / image_height);
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glVertex3f (dst.x3 / image_width, dst.y3 / image_height, 0);
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glTexCoord2f (src.x4 / image_width, src.y4 / image_height);
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glVertex3f (dst.x4 / image_width, dst.y4 / image_height, 0);
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glEnd ();
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glDisable (GL_TEXTURE_2D);
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glPopMatrix ();
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glfwSwapBuffers (window);
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glfwPollEvents ();
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}
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glfwDestroyWindow (window);
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glfwTerminate ();
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exit (EXIT_SUCCESS);
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}
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