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我不熟悉使用Visual Studio和库OpenGL和SDL。使用SDL和GLEW设置Visual Studio项目
我在设置程序时遇到问题，并在尝试构建程序时遇到错误。
谁能帮我解决下 -
Error 1 error LNK2019: unresolved external symbol [email protected] referenced in function _SDL_main
Error 2 error LNK2019: unresolved external symbol [email protected] referenced in function _SDL_main
Error 3 error LNK2001: unresolved external symbol __imp____GLEW_VERSION_3_0
Error 4 error LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup
Error 5 error LNK1120: 4 unresolved externals
6 IntelliSense: identifier "GLuint" is undefined
7 IntelliSense: identifier "GLuint" is undefined
这是我的代码 -
的main.c
#include<SDL.h>
#include<GL\glew.h>
#include <stdio.h>
char shouldExit = 0;
int main(void)
{
/* Initialize SDL *l
if(SDL_Init(SDL_INIT_VIDEO) < 0) {
return 1;
}
/* Create the window, OpenGL context */
SDL_GL_SetAttribute(SDL_GL_BUFFER_SIZE, 32);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_Window* window = SDL_CreateWindow(
"TestSDL",
SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
640, 480,
SDL_WINDOW_OPENGL);
if (!window) {
fprintf(stderr, "Could not create window.ErrorCode = %s\n", SDL_GetError());
SDL_Quit();
return 1;
}
SDL_GL_CreateContext(window);
/* Make sure we have a recent version of OpenGL */
GLenum glewError = glewInit();
if (glewError != GLEW_OK) {
fprintf(stderr, "Could not initialize glew.ErrorCode = %s\n", glewGetErrorString(glewError));
SDL_Quit();
return 1;
}
if (!GLEW_VERSION_3_0) {
fprintf(stderr, "OpenGL max supported version is too low.\n");
SDL_Quit();
return 1;
}
/* Setup OpenGL state */
glViewport(0, 0, 640, 480);
glMatrixMode(GL_PROJECTION);
glOrtho(0, 640, 480, 0, 0, 100);
glEnable(GL_TEXTURE_2D);
/* The game loop */
while (!shouldExit) {
// Handle OS message pump
SDL_Event event;
while (SDL_PollEvent(&event)) {
switch (event.type) {
case SDL_QUIT:
shouldExit = 1;
}
}
glClearColor(0, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
/* Game logic goes here */
SDL_GL_SwapWindow(window);
}
SDL_Quit();
return 0;
}
DrawUtils.c
/***********************************************************************
Utilities for loading and drawing sprites.
*/
#include<GL/glew.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<assert.h>
/* Load a file into an OpenGL texture, and return that texture. */
GLuint glTexImageTGAFile(const char* filename, int* outWidth, int* outHeight)
{
const int BPP = 4;
/* open the file */
FILE* file = fopen(filename, "rb");
if(file == NULL) {
fprintf(stderr, "File: %s -- Could not open for reading.\n", filename);
return 0;
}
/* skip first two bytes of data we don't need */
fseek(file, 2, SEEK_CUR);
/* read in the image type. For our purposes the image type should
* be either a 2 or a 3. */
unsigned char imageTypeCode;
fread(&imageTypeCode, 1, 1, file);
if(imageTypeCode != 2 && imageTypeCode != 3) {
fclose(file);
fprintf(stderr, "File: %s -- Unsupported TGA type: %d\n", filename, imageTypeCode);
return 0;
}
/* skip 9 bytes of data we don't need */
fseek(file, 9, SEEK_CUR);
/* read image dimensions */
int imageWidth = 0;
int imageHeight = 0;
int bitCount = 0;
fread(&imageWidth, sizeof(short), 1, file);
fread(&imageHeight, sizeof(short), 1, file);
fread(&bitCount, sizeof(unsigned char), 1, file);
fseek(file, 1, SEEK_CUR);
/* allocate memory for image data and read it in */
unsigned char* bytes = (unsigned char*)calloc(imageWidth * imageHeight * BPP, 1);
/* read in data */
if(bitCount == 32) {
int it;
for(it = 0; it != imageWidth * imageHeight; ++it) {
bytes[ it * BPP + 0 ] = fgetc(file);
bytes[ it * BPP + 1 ] = fgetc(file);
bytes[ it * BPP + 2 ] = fgetc(file);
bytes[ it * BPP + 3 ] = fgetc(file);
}
} else {
int it;
for(it = 0; it != imageWidth * imageHeight; ++it) {
bytes[ it * BPP + 0 ] = fgetc(file);
bytes[ it * BPP + 1 ] = fgetc(file);
bytes[ it * BPP + 2 ] = fgetc(file);
bytes[ it * BPP + 3 ] = 255;
}
}
fclose(file);
/* load into OpenGL */
GLuint tex;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, imageWidth, imageHeight, 0,
GL_BGRA, GL_UNSIGNED_BYTE, bytes);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
free(bytes);
if(outWidth) {
*outWidth = imageWidth;
}
if(outHeight) {
*outHeight = imageHeight;
}
return tex;
}
/* Draw the sprite */
void glDrawSprite(GLuint tex, int x, int y, int w, int h)
{
glBindTexture(GL_TEXTURE_2D, tex);
glBegin(GL_QUADS);
{
glColor3ub(255, 255, 255);
glTexCoord2f(0, 1);
glVertex2i(x, y);
glTexCoord2f(1, 1);
glVertex2i(x + w, y);
glTexCoord2f(1, 0);
glVertex2i(x + w, y + h);
glTexCoord2f(0, 0);
glVertex2i(x, y + h);
}
glEnd();
}
DrawUtils。 h
#ifndef DRAWUTILS_H
#define DRAWUTILS_H
#ifdef __cplusplus
extern "C" {
#endif
GLuint glTexImageTGAFile(const char* filename, int* outWidth, int* outHeight);
void glDrawSprite(GLuint tex, int x, int y, int w, int h);
#ifdef __cplusplus
}
#endif
#endif
我是否缺少#include？
不回答你的问题，但值得指出的是：以上'SDL_Init的评论（） '没有终止，因为你在最后有'l'而不是'/'（'/ * Initialize SDL * l'），所以SDL不会被初始化。 – GoBusto 2015-02-08 08:34:48