#include?
#include?
#include?
#include?
#include?
#include?“pngtools.h“

#ifdef?__APPLE__
#include???????????//?OS?X?version?of?GLUT
#else
#define?FREEGLUT_STATIC
#include?????????????//?Windows?FreeGlut?equivalent
#endif

#include?
using?namespace?std;

GLfloat?vertexArray[12]?=?{-0.9f?-0.9f?0.0f
???????????????????????????????????????????????0.9f?-0.9f?0.0f
???????????????????????????????????????????????0.9f??0.9f?0.0f
??????????????????????????????????????????????-0.9f??0.9f?0.0f??};

GLfloat?texCoord[8]?=?{?0.0f?0.0f
?????????????????????????????????????????1.0f?0.0f
?????????????????????????????????????????1.0f?1.0f
?????????????????????????????????????????0.0f?1.0f?};

pngtexture?*PNGTex;

GLuint?vao;
GLuint?vertex_buffer;
GLuint?texture_buffer;
GLuint?TextureID;
GLuint?vert_shader?frag_shader;
GLuint?program;

/************************************************************************************/
void?ChangeSize（int?w?int?h）
{
????glViewport（0?0?w?h）;
}

/************************************************************************************/
#include?
#include?
#define?MAX_SHADER_LENGTH?8192
#define?MAX_TARGET_NUM??10

GLchar?shaderText[MAX_SHADER_LENGTH];

void?gltLoadShaderSrc（const?char?*szShaderSrc?GLuint?shader）
{
????GLchar?*fsStringPtr[1];

????fsStringPtr[0]?=?（GLchar?*）szShaderSrc;
????glShaderSource（shader?1?（const?GLchar?**）fsStringPtr?NULL）;
}

bool?gltLoadShaderFile（const?char?*szFile?GLuint?shader）
{
????GLint?shaderLength?=?0;
????FILE?*fp;

????//?Open?the?shader?file
????fp?=?fopen（szFile?“r“）;
????if（fp?!=?NULL）
????{
????????//?See?how?long?the?file?is
????????while?（fgetc（fp）?!=?EOF）
????????????shaderLength++;

????????//?Allocate?a?block?of?memory?to?send?in?the?shader
????????assert（shaderLength?????????if（shaderLength?>?MAX_SHADER_LENGTH）
????????{
????????????fclose（fp）;
????????????return?false;
????????}

????????//?Go?back?to?beginning?of?file
????????rewind（fp）;

????????//?Read?the?whole?file?in
????????if?（shaderText?!=?NULL）
????????????fread（shaderText?1?shaderLength?fp）;

????????//?Make?sure?it?is?null?terminated?and?close?the?file
????????shaderText[shaderLength]?=?‘\0‘;
????????fclose（fp）;
????}
????else
????????return?false;

????//?Load?the?string
????gltLoadShaderSrc（（const?char?*）shaderText?shader）;

????return?true;
}

void?SetupRC（）
{
????glClearColor（1.0f?1.0f?1.0f?1.0f）;

????PNGTex?=?ReadPNGFromFile（“map.png“）;

????glGenVertexArrays（1?&vao）;
????glBindVertexArray（vao）;

????glGenBuffers（1?&vertex_buffer）;
????glBindBuffer（GL_ARRAY_BUFFER?vertex_buffer）;
????glBufferData（GL_ARRAY_BUFFER
?????????????????4?*?sizeof（GLfloat）?*?3
?????????????????vertexArray?GL_STATIC_DRAW）;

????glVertexAttribPointer（0?3?GL_FLOAT?GL_FALSE?0?（void?*）0）;
????glEnableVertexAttribArray（0）;

????glGenBuffers（1?&texture_buffer）;
???

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-04-14?13:16??PNG_texture\
?????文件?????????287??2017-12-27?16:47??PNG_texture\Identity.fp
?????文件?????????327??2017-12-27?16:47??PNG_texture\Identity.vp
?????文件????????5338??2016-10-11?13:30??PNG_texture\main.cpp
?????文件????63443043??2017-12-27?16:47??PNG_texture\map.png
?????文件????????4446??2016-10-11?13:30??PNG_texture\pngtools.cpp
?????文件?????????382??2016-10-11?13:27??PNG_texture\pngtools.h
?????文件?????????308??2016-10-11?12:58??PNG_texture\Rectangle.pro