save img to bmp

main.cpp

@@ -163,7 +163,7 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 		glUniformMatrix4fv(PLocation, 1, GL_FALSE, glm::value_ptr(projection));
 		glUniformMatrix4fv(NMLocation, 1, GL_FALSE, glm::value_ptr(normalMatrix));
 
-		glBindTexture(GL_TEXTURE_2D, mainTexture);
+		glBindTexture(GL_TEXTURE_2D, secondTexture);
 		glUniform1i(textureLocation, 0);
 
 		glBindBuffer(GL_ARRAY_BUFFER, vbo);

misc.cpp

@@ -1,6 +1,7 @@
 #include "misc.h"
-#include "FreeImage.h"
 #include <stdio.h>
+#include <windows.h>
+#include "FreeImage.h"
 
 #pragma comment(lib,"FreeImage.lib")
 
@@ -251,7 +252,36 @@ GLuint CreateTextureFromDds(const char * imagePath)
 	glCompressedTexImage2D(GL_TEXTURE_2D, 0, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, width, height, 0, pixelSize, pixelData);
 
 	glBindTexture(GL_TEXTURE_2D, 0);
-
 	delete imgData;
 	return texture;
 }
+void SaveImage(const char*imagePath, unsigned char*imgData, int width, int height)
+{
+	FILE*pFile = fopen(imagePath, "wb");
+	if (pFile)
+	{
+		BITMAPFILEHEADER bfh;
+		memset(&bfh, 0, sizeof(BITMAPFILEHEADER));
+		bfh.bfType = 0x4D42;
+		bfh.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + width*height * 3;
+		bfh.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
+		fwrite(&bfh, sizeof(BITMAPFILEHEADER), 1, pFile);
+
+		BITMAPINFOHEADER bih;
+		memset(&bih, 0, sizeof(BITMAPINFOHEADER));
+		bih.biWidth = width;
+		bih.biHeight = height;
+		bih.biBitCount = 24;
+		bih.biSize = sizeof(BITMAPINFOHEADER);
+		fwrite(&bih, sizeof(BITMAPINFOHEADER), 1, pFile);
+		unsigned char temp = 0;
+		for (int i = 0; i<width*height * 3; i += 3)
+		{
+			temp = imgData[i + 2];
+			imgData[i + 2] = imgData[i];
+			imgData[i] = temp;
+		}
+		fwrite(imgData, 1, width*height * 3, pFile);
+		fclose(pFile);
+	}
+}

misc.h

@@ -8,3 +8,4 @@ GLuint CreateGPUProgram(const char* vsShaderPath, const char* fsShaderPath);
 GLuint CreateTextureFromBMP(const char* imagePath);
 GLuint CreateTextureFromFile(const char* imagePath);
 GLuint CreateTextureFromDds(const char* imagePath);
+void SaveImage(const char* imgPath, unsigned char* imgData, int width, int height);