完善utils

renderFramework.vcxproj

@@ -77,6 +77,7 @@
       <SDLCheck>true</SDLCheck>
       <ConformanceMode>true</ConformanceMode>
       <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalOptions>/D_CRT_SECURE_NO_WARNINGS %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -127,10 +128,12 @@
   <ItemGroup>
     <ClCompile Include="main.cpp" />
     <ClCompile Include="scene.cpp" />
+    <ClCompile Include="utils.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="ggl.h" />
     <ClInclude Include="scene.h" />
+    <ClInclude Include="utils.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">

renderFramework.vcxproj.filters

@@ -21,6 +21,9 @@
     <ClCompile Include="scene.cpp">
       <Filter>源文件</Filter>
     </ClCompile>
+    <ClCompile Include="utils.cpp">
+      <Filter>源文件</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="ggl.h">
@@ -29,5 +32,8 @@
     <ClInclude Include="scene.h">
       <Filter>源文件</Filter>
     </ClInclude>
+    <ClInclude Include="utils.h">
+      <Filter>源文件</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>

utils.cpp

@@ -0,0 +1,82 @@
+#include "utils.h"
+unsigned char* DecodeBMP(unsigned char*bmpFileData, int&width, int&height) {
+	if (0x4D42 == *((unsigned short*)bmpFileData)) {
+		int pixelDataOffset = *((int*)(bmpFileData + 10));
+		width = *((int*)(bmpFileData + 18));
+		height = *((int*)(bmpFileData + 22));
+		unsigned char*pixelData = bmpFileData + pixelDataOffset;
+		for (int i = 0; i < width*height * 3; i += 3) {
+			unsigned char temp = pixelData[i];
+			pixelData[i] = pixelData[i + 2];
+			pixelData[i + 2] = temp;
+		}
+		return pixelData;
+	}
+	return nullptr;
+}
+GLuint CreateTexture2D(unsigned char*pixelData, int width, int height, GLenum type) {
+	GLuint texture;
+	glGenTextures(1, &texture);
+	glBindTexture(GL_TEXTURE_2D, texture);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	glTexImage2D(GL_TEXTURE_2D, 0, type, width, height, 0, type, GL_UNSIGNED_BYTE, pixelData);
+	glBindTexture(GL_TEXTURE_2D, 0);
+	return texture;
+}
+GLuint CreateTexture2DFromBMP(const char*bmpPath) {
+	int nFileSize = 0;
+	unsigned char *bmpFileContent = LoadFileContent(bmpPath, nFileSize);
+	if (bmpFileContent == nullptr) {
+		return 0;
+	}
+	int bmpWidth = 0, bmpHeight = 0;
+	unsigned char*pixelData = DecodeBMP(bmpFileContent, bmpWidth, bmpHeight);
+	if (bmpWidth == 0) {
+		delete bmpFileContent;
+		return 0;
+	}
+	GLuint texture = CreateTexture2D(pixelData, bmpWidth, bmpHeight, GL_RGB);
+	delete bmpFileContent;
+	return texture;
+}
+GLuint CreateTextureCubeFromBMP(const char *front, const char *back, const char *left,
+	const char *right, const char *top, const char *bottom) {
+	GLuint texture;
+	glGenTextures(1, &texture);
+	glBindTexture(GL_TEXTURE_CUBE_MAP, texture);
+	int nFileSize = 0, width = 0, height = 0;
+	glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+	glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
+	unsigned char *bmpFileContent = LoadFileContent(front, nFileSize);
+	unsigned char*pixelData = DecodeBMP(bmpFileContent, width, height);
+	glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, pixelData);
+	delete bmpFileContent;
+	bmpFileContent = LoadFileContent(back, nFileSize);
+	pixelData = DecodeBMP(bmpFileContent, width, height);
+	glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, pixelData);
+	delete bmpFileContent;
+	bmpFileContent = LoadFileContent(left, nFileSize);
+	pixelData = DecodeBMP(bmpFileContent, width, height);
+	glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, pixelData);
+	delete bmpFileContent;
+	bmpFileContent = LoadFileContent(right, nFileSize);
+	pixelData = DecodeBMP(bmpFileContent, width, height);
+	glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, pixelData);
+	delete bmpFileContent;
+	bmpFileContent = LoadFileContent(top, nFileSize);
+	pixelData = DecodeBMP(bmpFileContent, width, height);
+	glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, pixelData);
+	delete bmpFileContent;
+	bmpFileContent = LoadFileContent(bottom, nFileSize);
+	pixelData = DecodeBMP(bmpFileContent, width, height);
+	glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, pixelData);
+	glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
+	delete bmpFileContent;
+	return texture;
+}

utils.h

@@ -1,2 +1,8 @@
 #pragma once
-unsigned char * LoadFileContent(const char*path, int&filesize);
+#include "ggl.h"
+unsigned char * LoadFileContent(const char*path, int&filesize);
+unsigned char * DecodeBMP(unsigned char*bmpFileData, int&width, int&height);
+GLuint CreateTexture2D(unsigned char*pixelData, int width, int height, GLenum type);
+GLuint CreateTexture2DFromBMP(const char *bmpPath);
+GLuint CreateTextureCubeFromBMP(const char *front, const char *back, const char *left,
+	const char *right, const char *top, const char *bottom);