basic text rendering

1 files changed, 215 insertions, 0 deletions

diff --git a/src/render/tga.cc b/src/render/tga.cc
new file mode 100644
index 0000000..317e2ac
--- /dev/null
+++ b/src/render/tga.cc
@@ -0,0 +1,215 @@
+/* 
+	Ronny Andr�Reierstad
+	http://www.morrowland.com
+	http://www.morrowland.com/apron/tut_gl.php
+	apron@morrowland.com
+*/
+
+#include "filesystem/filesystem.h"
+#include "render/tga.h"
+#include "sys/sys.h"
+#include "GL/gl.h"
+#include <GL/glu.h> 
+
+namespace render 
+{
+
+/////////////////////////////////////////////////////////////////////////////////////////////////
+//										TGA TEXTURE LOADER
+/////////////////////////////////////////////////////////////////////////////////////////////////
+void TGA::texture(GLuint textureArray[], const char *filename, int ID)
+{
+	if(!filename)
+		return;
+
+	filesystem::File f;
+
+	f.open(filename);
+
+	if (!f.is_open())
+		return;
+	f.close();
+	
+	image *pBitMap = load(f.path().c_str());
+
+	if(pBitMap == 0) {
+		con_warn << "could not load " << f.path().c_str() << std::endl;
+		return;
+	}
+
+	glGenTextures(1, &textureArray[ID]);
+	glBindTexture(GL_TEXTURE_2D, textureArray[ID]);
+	int textureType = GL_RGB;
+	if(pBitMap->channels == 4)	textureType = GL_RGBA;
+	gluBuild2DMipmaps(GL_TEXTURE_2D, pBitMap->channels, pBitMap->size_x, pBitMap->size_y, textureType, GL_UNSIGNED_BYTE, pBitMap->data);
+	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR_MIPMAP_LINEAR);	
+	
+	if (pBitMap)									
+	{
+		if (pBitMap->data)						
+		{
+			free(pBitMap->data);	
+		}
+		free(pBitMap);							
+	}
+}
+
+
+TGA::image *TGA::load(const char *filename)
+{
+	image *pImgData			= NULL;		
+	FILE *pFile			= NULL;	
+	GLushort width			= 0;
+	GLushort height			= 0;
+	GLubyte length			= 0;
+	GLubyte imgType			= 0;
+	GLubyte bits			= 0;
+	GLushort channels			= 0;
+	GLushort stride			= 0;
+	
+	pFile = fopen(filename, "rb");
+	if (!pFile)
+		return 0;
+
+	pImgData = (image*)malloc(sizeof(image));
+	
+	fread(&length, sizeof(GLubyte), 1, pFile);
+	
+	fseek(pFile,1,SEEK_CUR); 
+	
+	fread(&imgType, sizeof(GLubyte), 1, pFile);
+	
+	fseek(pFile, 9, SEEK_CUR); 
+	
+	fread(&width,  sizeof(GLushort), 1, pFile);
+	fread(&height, sizeof(GLushort), 1, pFile);
+	fread(&bits,   sizeof(GLubyte), 1, pFile);
+
+	con_debug << "TGA loading " << width << "x" << height << " " << (int) bits << "bpp" << std::endl;
+	
+	fseek(pFile, length + 1, SEEK_CUR); 
+	
+	if(imgType != TGA_RLE)
+	{
+		// Check for 24 or 32 Bit
+		if(bits == 24 || bits == 32)
+		{
+			
+			channels = bits / 8;
+			stride = channels * width;
+			pImgData->data = new unsigned char[stride * height];
+			
+			for(GLushort y = 0; y < height; y++)
+			{
+				unsigned char *pLine = &(pImgData->data[stride * y]);
+				
+				fread(pLine, stride, 1, pFile);
+				
+				for(GLushort i = 0; i < stride; i += channels)
+				{
+					int temp     = pLine[i];
+					pLine[i]     = pLine[i + 2];
+					pLine[i + 2] = temp;
+				}
+			}
+		}
+				
+		// Check for 16 Bit
+		else if(bits == 16)
+		{
+			unsigned short pixels = 0;
+			int r=0, g=0, b=0;
+			
+			channels = 3;
+			stride = channels * width;
+			pImgData->data = new unsigned char[stride * height];
+			
+			for(int i = 0; i < width*height; i++)
+			{
+				fread(&pixels, sizeof(GLushort), 1, pFile);
+				
+				b = (pixels & 0x1f) << 3;
+				g = ((pixels >> 5) & 0x1f) << 3;
+				r = ((pixels >> 10) & 0x1f) << 3;
+				
+				pImgData->data[i * 3 + 0] = r;
+				pImgData->data[i * 3 + 1] = g;
+				pImgData->data[i * 3 + 2] = b;
+			}
+		}	
+		
+		else
+			return NULL;
+	}
+	
+	else
+	{
+		GLubyte rleID = 0;
+		int colorsRead = 0;
+		channels = bits / 8;
+		stride = channels * width;
+		
+		pImgData->data = new unsigned char[stride * height];
+		GLubyte *pColors = new GLubyte [channels];
+		
+		int i = 0;
+		while(i < width*height)
+		{
+			
+			fread(&rleID, sizeof(GLubyte), 1, pFile);
+			
+			
+			if(rleID < 128)	{
+				rleID++;
+				
+				while(rleID)
+				{
+					fread(pColors, sizeof(GLubyte) * channels, 1, pFile);
+					
+					pImgData->data[colorsRead + 0] = pColors[2];
+					pImgData->data[colorsRead + 1] = pColors[1];
+					pImgData->data[colorsRead + 2] = pColors[0];
+					
+					if(bits == 32)	pImgData->data[colorsRead + 3] = pColors[3];
+					
+					i++;
+					rleID--;
+					colorsRead += channels;
+				}
+			} 
+			
+			else
+			{
+				rleID -= 127;
+				
+				fread(pColors, sizeof(GLubyte) * channels, 1, pFile);
+				
+				while(rleID)
+				{
+					pImgData->data[colorsRead + 0] = pColors[2];
+					pImgData->data[colorsRead + 1] = pColors[1];
+					pImgData->data[colorsRead + 2] = pColors[0];
+					
+					if(bits == 32)	pImgData->data[colorsRead + 3] = pColors[3];
+					
+					i++;
+					rleID--;
+					colorsRead += channels;
+				}
+			}
+		}
+		delete[] pColors;
+	}
+	
+	fclose(pFile);
+	
+	
+	pImgData->channels  = channels;
+	pImgData->size_x    = width;
+	pImgData->size_y    = height;
+	
+	return pImgData;
+}
+
+}