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#include <windows.h>
#include <gl/gl.h>
#include <gl/glut.h>
#include <stdio.h>
void Display();
void Reshape(int,int);
void Init();
typedef struct
{
unsigned long header_size;
long width;
long height;
unsigned short r1;
unsigned short depth;
unsigned long r2;
unsigned long size;
long r3,r4;
unsigned long r5,r6;
}pejaxx_BmpImageHeader;
typedef struct tagpejaxx_BmpFileHeader
{
unsigned short type;
unsigned long size;
unsigned short r1, r2;
unsigned long data_offset;
}pejaxx_BmpFileHeader, *LPpejaxx_BmpFileHeader;
int pejaxx_WriteBMP(const char *filename,unsigned char *bmp, int width, int height){
pejaxx_BmpFileHeader fileheader;
pejaxx_BmpImageHeader imageheader;
fileheader.size = 14;
fileheader.type = 0x4D42;
fileheader.r1 = 0;
fileheader.r2=0;
fileheader.data_offset = 14+40;
imageheader.header_size = 40;
imageheader.r1 = 1;
imageheader.depth = 24;
imageheader.r2 = 0;
imageheader.size = width * abs(height) * 3;
imageheader.r3 = 0;
imageheader.r4 = 0;
imageheader.r5 = 0;
imageheader.r6 = 0;
imageheader.width = width;
imageheader.height = height;
FILE *fichier = fopen(filename,"wb");
//fwrite(&fileheader, 1, 14, fichier);
//fwrite(&imageheader, 1, 40, fichier);
fwrite( &fileheader.type, sizeof(fileheader.type), 1, fichier);
fwrite( &fileheader.size, sizeof(fileheader.size), 1, fichier);
fwrite( &fileheader.r1, sizeof(fileheader.r1), 1, fichier);
fwrite( &fileheader.r2, sizeof(fileheader.r2), 1, fichier);
fwrite( &fileheader.data_offset, sizeof(fileheader.data_offset), 1, fichier);
fwrite( &imageheader.header_size, sizeof(imageheader.header_size), 1, fichier);
fwrite( &imageheader.width, sizeof(imageheader.width), 1, fichier);
fwrite( &imageheader.height, sizeof(imageheader.height), 1, fichier);
fwrite( &imageheader.r1, sizeof(imageheader.r1), 1, fichier);
fwrite( &imageheader.depth, sizeof(imageheader.depth), 1, fichier);
fwrite( &imageheader.r2, sizeof(imageheader.r2), 1, fichier);
fwrite( &imageheader.size, sizeof(imageheader.size), 1, fichier);
fwrite( &imageheader.r3, sizeof(imageheader.r3), 1, fichier);
fwrite( &imageheader.r4, sizeof(imageheader.r4), 1, fichier);
fwrite( &imageheader.r5, sizeof(imageheader.r5), 1, fichier);
fwrite( &imageheader.r6, sizeof(imageheader.r6), 1, fichier);
int i,j,k;
for(j=0;j<height;j++)for(i=0;i<width;i++)for(k=0;k<3;k++){
fwrite(&bmp[(i+j*width)*3+k], 1, sizeof(char), fichier);
}
fclose(fichier);
return 1;
}
////////////////////////////////////////////////////////////////////////////
int main( int argc, char *argv[ ])
{
Init();
Reshape(256,256);
Display();
return 0;
}
void Init()
{
glEnable(GL_DEPTH_TEST);
}
void Display()
{
glClearColor(0,0,0,0); // selectionne la couleur noire (qui est celle par défaut)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(4,3,3,0,0,0,0,1,0);
glBegin(GL_QUADS);
glColor3d(1,0,0);
glVertex3i(1,1,1);
glVertex3i(1,-1,1);
glVertex3i(-1,-1,1);
glVertex3i(-1,1,1);
glColor3d(0,1,0);
glVertex3i(1,1,-1);
glVertex3i(1,-1,-1);
glVertex3i(-1,-1,-1);
glVertex3i(-1,1,-1);
glColor3d(0,0,1);
glVertex3i(1,1,1);
glVertex3i(1,-1,1);
glVertex3i(1,-1,-1);
glVertex3i(1,1,-1);
glColor3d(0,1,1);
glVertex3i(-1,1,1);
glVertex3i(-1,-1,1);
glVertex3i(-1,-1,-1);
glVertex3i(-1,1,-1);
glColor3d(1,1,0);
glVertex3i(-1,1,-1);
glVertex3i(-1,1,1);
glVertex3i(1,1,1);
glVertex3i(1,1,-1);
glColor3d(1,0,1);
glVertex3i(-1,-1,-1);
glVertex3i(-1,-1,1);
glVertex3i(1,-1,1);
glVertex3i(1,-1,-1);
glEnd();
glFlush();
unsigned char buffer[256*256*3];
glReadPixels(0, 0, 256, 256, GL_RGB, GL_UNSIGNED_BYTE, buffer);
pejaxx_WriteBMP("testopenGLtobuffer.bmp",buffer,256,256);
}
void Reshape(int w, int h)
{
glViewport(0,0,w,h);
glMatrixMode(GL_PROJECTION); // Choisit la matrice de projection
glLoadIdentity();
gluPerspective(45.0,(float) w/h,1.,10.);
} |
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