-/**
- * \file texture.cxx
+/*
* Texture manipulation routines
*
* Copyright (c) Mark J. Kilgard, 1997.
*/
#include <simgear/compiler.h>
+
#ifdef WIN32
# include <windows.h>
#endif
-#include <GL/glu.h>
+
+#include <osg/GLU>
+
+#include <math.h>
#include <zlib.h>
#include "texture.hxx"
#include "colours.h"
+
+const char *FILE_OPEN_ERROR = "Unable to open file.";
+const char *WRONG_COUNT = "Unsupported number of color channels.";
+const char *NO_TEXTURE = "No texture data resident.";
+const char *OUT_OF_MEMORY = "Out of memory.";
+
+
SGTexture::SGTexture()
+ : texture_id(0),
+ texture_data(0),
+ num_colors(3),
+ file(0)
{
- texture_data = 0;
}
SGTexture::SGTexture(unsigned int width, unsigned int height)
+ : texture_id(0),
+ errstr("")
{
texture_data = new GLubyte[ width * height * 3 ];
}
SGTexture::~SGTexture()
{
- delete texture_data;
+ delete[] texture_data;
+
+ if ( texture_id != 0 ) {
+ free_id();
+ }
}
void
SGTexture::bind()
{
- if (!texture_data) {
+ bool gen = false;
+ if (!texture_id) {
#ifdef GL_VERSION_1_1
glGenTextures(1, &texture_id);
#elif GL_EXT_texture_object
glGenTexturesEXT(1, &texture_id);
#endif
+ gen = true;
}
#ifdef GL_VERSION_1_1
glBindTextureEXT(GL_TEXTURE_2D, texture_id);
#endif
- if (!texture_data) {
+ if (gen) {
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
// Resize the OpenGL window to the size of our dynamic texture
resize(texture_width, texture_height);
- // Clear the contents of the screen buffer to blue
- glClearColor(0.0, 0.0, 1.0, 1.0);
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- // Turn off texturing (don't want the torus to be texture);
- glDisable(GL_TEXTURE_2D);
+ glClearColor(0.0, 0.0, 0.0, 1.0);
}
/**
SGTexture::ImageRec *image;
int y;
- if (texture_data)
- delete texture_data;
+ delete[] texture_data;
image = ImageOpen(name);
if(!image) {
+ errstr = FILE_OPEN_ERROR;
return;
}
if (image->zsize != 1) {
ImageClose(image);
+ errstr = WRONG_COUNT;
return;
}
texture_data = new GLubyte[ image->xsize * image->ysize ];
- if (!texture_data)
+ num_colors = 1;
+ if (!texture_data) {
+ errstr = NO_TEXTURE;
return;
+ }
lptr = texture_data;
for(y=0; y<image->ysize; y++) {
void
SGTexture::read_rgb_texture(const char *name)
+{
+ GLubyte *ptr;
+ GLubyte *rbuf, *gbuf, *bbuf;
+ SGTexture::ImageRec *image;
+ int y;
+
+ delete[] texture_data;
+
+ image = ImageOpen(name);
+ if(!image) {
+ errstr = FILE_OPEN_ERROR;
+ return;
+ }
+
+ texture_width = image->xsize;
+ texture_height = image->ysize;
+ if (image->zsize < 1 || image->zsize > 4) {
+ ImageClose(image);
+ errstr = WRONG_COUNT;
+ return;
+ }
+
+ num_colors = 3;
+ texture_data = new GLubyte[ image->xsize * image->ysize * num_colors ];
+ rbuf = new GLubyte[ image->xsize ];
+ gbuf = new GLubyte[ image->xsize ];
+ bbuf = new GLubyte[ image->xsize ];
+ if(!texture_data || !rbuf || !gbuf || !bbuf) {
+ delete[] texture_data;
+ delete[] rbuf;
+ delete[] gbuf;
+ delete[] bbuf;
+ errstr = OUT_OF_MEMORY;
+ return;
+ }
+
+ ptr = texture_data;
+ for(y=0; y<image->ysize; y++) {
+ if(image->zsize == 4 || image->zsize == 3) {
+ ImageGetRow(image,rbuf,y,0);
+ ImageGetRow(image,gbuf,y,1);
+ ImageGetRow(image,bbuf,y,2);
+ } else {
+ ImageGetRow(image,rbuf,y,0);
+ memcpy(gbuf,rbuf,image->xsize);
+ memcpy(bbuf,rbuf,image->xsize);
+ }
+ rgbtorgb(rbuf,gbuf,bbuf,ptr,image->xsize);
+ ptr += (image->xsize * num_colors);
+ }
+
+ ImageClose(image);
+ delete[] rbuf;
+ delete[] gbuf;
+ delete[] bbuf;
+}
+
+
+
+void
+SGTexture::read_rgba_texture(const char *name)
{
GLubyte *ptr;
GLubyte *rbuf, *gbuf, *bbuf, *abuf;
SGTexture::ImageRec *image;
int y;
- if (texture_data)
- delete texture_data;
+ delete[] texture_data;
image = ImageOpen(name);
- if(!image)
+ if(!image) {
+ errstr = FILE_OPEN_ERROR;
return;
+ }
texture_width = image->xsize;
texture_height = image->ysize;
- if (image->zsize != 3 && image->zsize != 4) {
+ if (image->zsize < 1 || image->zsize > 4) {
ImageClose(image);
+ errstr = WRONG_COUNT;
return;
}
- texture_data = new GLubyte[ image->xsize * image->ysize * 3];
+ num_colors = 4;
+ texture_data = new GLubyte[ image->xsize * image->ysize * num_colors ];
rbuf = new GLubyte[ image->xsize ];
gbuf = new GLubyte[ image->xsize ];
bbuf = new GLubyte[ image->xsize ];
abuf = new GLubyte[ image->xsize ];
if(!texture_data || !rbuf || !gbuf || !bbuf || !abuf) {
- delete texture_data;
- delete rbuf;
- delete gbuf;
- delete bbuf;
- delete abuf;
+ delete[] texture_data;
+ delete[] rbuf;
+ delete[] gbuf;
+ delete[] bbuf;
+ delete[] abuf;
+ errstr = OUT_OF_MEMORY;
return;
}
ImageGetRow(image,rbuf,y,0);
ImageGetRow(image,gbuf,y,1);
ImageGetRow(image,bbuf,y,2);
- ImageGetRow(image,abuf,y,3); /* Discard. */
- rgbtorgb(rbuf,gbuf,bbuf,ptr,image->xsize);
- ptr += (image->xsize * 3);
- } else {
+ ImageGetRow(image,abuf,y,3);
+ } else if(image->zsize == 3) {
ImageGetRow(image,rbuf,y,0);
ImageGetRow(image,gbuf,y,1);
ImageGetRow(image,bbuf,y,2);
- rgbtorgb(rbuf,gbuf,bbuf,ptr,image->xsize);
- ptr += (image->xsize * 3);
+ memset(abuf, 255, image->xsize);
+ } else if(image->zsize == 2) {
+ ImageGetRow(image,rbuf,y,0);
+ memcpy(gbuf,rbuf,image->xsize);
+ memcpy(bbuf,rbuf,image->xsize);
+ ImageGetRow(image,abuf,y,1);
+ } else {
+ ImageGetRow(image,rbuf,y,0);
+ memcpy(gbuf,rbuf,image->xsize);
+ memcpy(bbuf,rbuf,image->xsize);
+ memset(abuf, 255, image->xsize);
}
+ rgbatorgba(rbuf,gbuf,bbuf,abuf,ptr,image->xsize);
+ ptr += (image->xsize * num_colors);
}
ImageClose(image);
- delete rbuf;
- delete gbuf;
- delete bbuf;
- delete abuf;
+ delete[] rbuf;
+ delete[] gbuf;
+ delete[] bbuf;
+ delete[] abuf;
}
void
SGTexture::ImageRec *image;
int y;
- if (texture_data)
- delete texture_data;
+ delete[] texture_data;
image = RawImageOpen(name);
- if(!image)
+ if(!image) {
+ errstr = FILE_OPEN_ERROR;
return;
+ }
texture_width = 256;
texture_height = 256;
texture_data = new GLubyte[ 256 * 256 * 3 ];
- if(!texture_data)
+ if(!texture_data) {
+ errstr = OUT_OF_MEMORY;
return;
+ }
ptr = texture_data;
for(y=0; y<256; y++) {
SGTexture::ImageRec *image;
int xy;
- if (texture_data)
- delete texture_data;
+ delete[] texture_data;
//it wouldn't make sense to write a new function ...
image = RawImageOpen(name);
- if(!image)
+ if(!image) {
+ errstr = FILE_OPEN_ERROR;
return;
+ }
texture_width = 256;
texture_height = 256;
texture_data = new GLubyte [ 256 * 256 * 3 ];
- if(!texture_data)
+ if(!texture_data) {
+ errstr = OUT_OF_MEMORY;
return;
+ }
ptr = texture_data;
for(xy=0; xy<(256*256); xy++) {
void
-SGTexture::set_pixel(GLuint x, GLuint y, sgVec3 &c)
+SGTexture::write_texture(const char *name) {
+ SGTexture::ImageRec *image = ImageWriteOpen(name);
+
+ for (int c=0; c<num_colors; c++) {
+ GLubyte *ptr = texture_data + c;
+ for (int y=0; y<texture_height; y++) {
+ for (int x=0; x<texture_width; x++) {
+ image->tmp[x]=*ptr;
+ ptr = ptr + num_colors;
+ }
+ fwrite(image->tmp, 1, texture_width, file);
+ }
+ }
+
+ ImageClose(image);
+}
+
+
+void
+SGTexture::set_pixel(GLuint x, GLuint y, GLubyte *c)
{
- unsigned int pos = (x + y*texture_width)*3;
- texture_data[pos] = c[0];
- texture_data[pos+1] = c[1];
- texture_data[pos+2] = c[2];
+ if (!texture_data) {
+ errstr = NO_TEXTURE;
+ return;
+ }
+
+ unsigned int pos = (x + y*texture_width) * num_colors;
+ memcpy(texture_data+pos, c, num_colors);
}
-sgVec3 *
+GLubyte *
SGTexture::get_pixel(GLuint x, GLuint y)
{
- static sgVec3 c;
- unsigned int pos = (x + y*texture_width)*3;
+ static GLubyte c[4] = {0, 0, 0, 0};
+
+ if (!texture_data) {
+ errstr = NO_TEXTURE;
+ return c;
+ }
- sgSetVec3(c, texture_data[pos], texture_data[pos+1], texture_data[pos+2]);
+ unsigned int pos = (x + y*texture_width)*num_colors;
+ memcpy(c, texture_data + pos, num_colors);
- return &c;
+ return c;
}
-
SGTexture::ImageRec *
SGTexture::ImageOpen(const char *fileName)
{
}
image = new SGTexture::ImageRec;
+ memset(image, 0, sizeof(SGTexture::ImageRec));
if (image == 0) {
- // fprintf(stderr, "Out of memory!\n");
+ errstr = OUT_OF_MEMORY;
return 0;
}
if ((image->file = gzopen(fileName, "rb")) == 0) {
+ errstr = FILE_OPEN_ERROR;
return 0;
}
image->tmp = new GLubyte[ image->xsize * 256 ];
if (image->tmp == 0) {
- // fprintf(stderr, "\nOut of memory!\n");
+ errstr = OUT_OF_MEMORY;
return 0;
}
image->rowStart = new unsigned[x];
image->rowSize = new int[x];
if (image->rowStart == 0 || image->rowSize == 0) {
- // fprintf(stderr, "\nOut of memory!\n");
+ errstr = OUT_OF_MEMORY;
return 0;
}
image->rleEnd = 512 + (2 * x);
void
SGTexture::ImageClose(SGTexture::ImageRec *image) {
- gzclose(image->file);
- delete image->tmp;
+ if (image->file) gzclose(image->file);
+ if (file) fclose(file);
+ delete[] image->tmp;
+ delete[] image->rowStart;
+ delete[] image->rowSize;
delete image;
}
-
SGTexture::ImageRec *
SGTexture::RawImageOpen(const char *fileName)
{
}
image = new SGTexture::ImageRec;
+ memset(image, 0, sizeof(SGTexture::ImageRec));
if (image == 0) {
- // fprintf(stderr, "Out of memory!\n");
+ errstr = OUT_OF_MEMORY;
return 0;
}
if ((image->file = gzopen(fileName, "rb")) == 0) {
+ errstr = FILE_OPEN_ERROR;
return 0;
}
//just allocate a pseudo value as I'm too lazy to change ImageClose()...
- image->tmp = new GLubyte;
+ image->tmp = new GLubyte[1];
+
+ if (image->tmp == 0) {
+ errstr = OUT_OF_MEMORY;
+ return 0;
+ }
+
+ return image;
+}
+
+SGTexture::ImageRec *
+SGTexture::ImageWriteOpen(const char *fileName)
+{
+ union {
+ int testWord;
+ char testByte[4];
+ } endianTest;
+ ImageRec* image;
+ int swapFlag;
+ int x;
+
+ endianTest.testWord = 1;
+ if (endianTest.testByte[0] == 1) {
+ swapFlag = 1;
+ } else {
+ swapFlag = 0;
+ }
+
+ image = new SGTexture::ImageRec;
+ memset(image, 0, sizeof(SGTexture::ImageRec));
+ if (image == 0) {
+ errstr = OUT_OF_MEMORY;
+ return 0;
+ }
+ if ((file = fopen(fileName, "wb")) == 0) {
+ errstr = FILE_OPEN_ERROR;
+ return 0;
+ }
+
+ image->imagic = 474;
+ image->type = 0x0001;
+ image->dim = (num_colors > 1) ? 3 : 2;
+ image->xsize = texture_width;
+ image->ysize = texture_height;
+ image->zsize = num_colors;
+
+ if (swapFlag) {
+ ConvertShort(&image->imagic, 6);
+ }
+ fwrite(image, 1, 12, file);
+ fseek(file, 512, SEEK_SET);
+
+ image->tmp = new GLubyte[ image->xsize * 256 ];
if (image->tmp == 0) {
- // fprintf(stderr, "\nOut of memory!\n");
+ errstr = OUT_OF_MEMORY;
return 0;
}
+ if ((image->type & 0xFF00) == 0x0100) {
+ x = image->ysize * image->zsize * (int) sizeof(unsigned);
+ image->rowStart = new unsigned[x];
+ image->rowSize = new int[x];
+ if (image->rowStart == 0 || image->rowSize == 0) {
+ errstr = OUT_OF_MEMORY;
+ return 0;
+ }
+ image->rleEnd = 512 + (2 * x);
+ fseek(file, 512, SEEK_SET);
+ fread(image->rowStart, 1, x, file);
+ fread(image->rowSize, 1, x, file);
+ if (swapFlag) {
+ ConvertUint(image->rowStart, x/(int) sizeof(unsigned));
+ ConvertUint((unsigned *)image->rowSize, x/(int) sizeof(int));
+ }
+ }
+
return image;
+
}
void
if ((image->type & 0xFF00) == 0x0100) {
gzseek(image->file, (long) image->rowStart[y+z*image->ysize], SEEK_SET);
- gzread(image->file, image->tmp,
- (unsigned int)image->rowSize[y+z*image->ysize]);
+ int size = image->rowSize[y+z*image->ysize];
+ gzread(image->file, image->tmp, size);
+
+ iPtr = image->tmp;
+ oPtr = buf;
+ for (GLubyte *limit = iPtr + size; iPtr < limit;) {
+ pixel = *iPtr++;
+ count = (int)(pixel & 0x7F);
+ if (!count) {
+ errstr = WRONG_COUNT;
+ return;
+ }
+ if (pixel & 0x80) {
+ while (iPtr < limit && count--) {
+ *oPtr++ = *iPtr++;
+ }
+ } else if (iPtr < limit) {
+ pixel = *iPtr++;
+ while (count--) {
+ *oPtr++ = pixel;
+ }
+ }
+ }
+ } else {
+ gzseek(image->file, 512+(y*image->xsize)+(z*image->xsize*image->ysize),
+ SEEK_SET);
+ gzread(image->file, buf, image->xsize);
+ }
+}
+
+void
+SGTexture::ImagePutRow(SGTexture::ImageRec *image, GLubyte *buf, int y, int z) {
+ GLubyte *iPtr, *oPtr, pixel;
+ int count;
+
+ if ((image->type & 0xFF00) == 0x0100) {
+ fseek(file, (long) image->rowStart[y+z*image->ysize], SEEK_SET);
+ fread( image->tmp, 1, (unsigned int)image->rowSize[y+z*image->ysize],
+ file);
iPtr = image->tmp;
oPtr = buf;
pixel = *iPtr++;
count = (int)(pixel & 0x7F);
if (!count) {
+ errstr = WRONG_COUNT;
return;
}
if (pixel & 0x80) {
}
}
} else {
- gzseek(image->file, 512+(y*image->xsize)+(z*image->xsize*image->ysize),
+ fseek(file, 512+(y*image->xsize)+(z*image->xsize*image->ysize),
SEEK_SET);
- gzread(image->file, buf, image->xsize);
+ fread(buf, 1, image->xsize, file);
}
}
+
void
SGTexture::rgbtorgb(GLubyte *r, GLubyte *g, GLubyte *b, GLubyte *l, int n) {
while(n--) {
}
}
+void
+SGTexture::rgbatorgba(GLubyte *r, GLubyte *g, GLubyte *b, GLubyte *a,
+ GLubyte *l, int n) {
+ while(n--) {
+ l[0] = r[0];
+ l[1] = g[0];
+ l[2] = b[0];
+ l[3] = a[0];
+ l += 4; r++; g++; b++; a++;
+ }
+}
+
+
void
SGTexture::ConvertShort(unsigned short *array, unsigned int length) {
unsigned short b1, b2;
}
}
+
+void
+SGTexture::make_monochrome(float contrast, GLubyte r, GLubyte g, GLubyte b) {
+
+ if (num_colors >= 3)
+ return;
+
+ GLubyte ap[3];
+ for (int y=0; y<texture_height; y++)
+ for (int x=0; x<texture_width; x++)
+ {
+ GLubyte *rgb = get_pixel(x,y);
+ GLubyte avg = (rgb[0] + rgb[1] + rgb[2]) / 3;
+
+ if (contrast != 1.0) {
+ float pixcol = -1.0 + (avg/128);
+ avg = 128 + int(128*pow(pixcol, contrast));
+ }
+
+ ap[0] = avg*r/255;
+ ap[1] = avg*g/255;
+ ap[2] = avg*b/255;
+
+ set_pixel(x,y,ap);
+ }
+}
+
+
+void
+SGTexture::make_grayscale(float contrast) {
+ if (num_colors < 3)
+ return;
+
+ int colors = (num_colors == 3) ? 1 : 2;
+ GLubyte *map = new GLubyte[ texture_width * texture_height * colors ];
+
+ for (int y=0; y<texture_height; y++)
+ for (int x=0; x<texture_width; x++)
+ {
+ GLubyte *rgb = get_pixel(x,y);
+ GLubyte avg = (rgb[0] + rgb[1] + rgb[2]) / 3;
+
+ if (contrast != 1.0) {
+ float pixcol = -1.0 + (avg/128);
+ avg = 128 + int(128*pow(pixcol, contrast));
+ }
+
+ int pos = (x + y*texture_width)*colors;
+ map[pos] = avg;
+ if (colors > 1)
+ map[pos+1] = rgb[3];
+ }
+
+ delete[] texture_data;
+ texture_data = map;
+ num_colors = colors;
+}
+
+
+void
+SGTexture::make_maxcolorwindow() {
+ GLubyte minmaxc[2] = {255, 0};
+
+ int pos = 0;
+ int max = num_colors;
+ if (num_colors == 2) max = 1;
+ if (num_colors == 4) max = 3;
+ while (pos < texture_width * texture_height * num_colors) {
+ for (int i=0; i < max; i++) {
+ GLubyte c = texture_data[pos+i];
+ if (c < minmaxc[0]) minmaxc[0] = c;
+ if (c > minmaxc[1]) minmaxc[1] = c;
+ }
+ pos += num_colors;
+ }
+
+ GLubyte offs = minmaxc[0];
+ float factor = 255.0 / float(minmaxc[1] - minmaxc[0]);
+ // printf("Min: %i, Max: %i, Factor: %f\n", offs, minmaxc[1], factor);
+
+ pos = 0;
+ while (pos < texture_width * texture_height * num_colors) {
+ for (int i=0; i < max; i++) {
+ texture_data[pos+i] -= offs;
+ texture_data[pos+i] = int(factor * texture_data[pos+i]);
+ }
+ pos += num_colors;
+ }
+}
+
+
+void
+SGTexture::make_normalmap(float brightness, float contrast) {
+ make_grayscale(contrast);
+ make_maxcolorwindow();
+
+ int colors = (num_colors == 1) ? 3 : 4;
+ bool alpha = (colors > 3);
+ int tsize = texture_width * texture_height * colors;
+ GLubyte *map = new GLubyte[ tsize ];
+
+ int mpos = 0, dpos = 0;
+ for (int y=0; y<texture_height; y++) {
+ int ytw = y*texture_width;
+
+ for (int x=0; x<texture_width; x++)
+ {
+ int xp1 = (x < (texture_width-1)) ? x+1 : 0;
+ int yp1 = (y < (texture_height-1)) ? y+1 : 0;
+ int posxp1 = (xp1 + ytw)*num_colors;
+ int posyp1 = (x + yp1*texture_width)*num_colors;
+
+ GLubyte c = texture_data[dpos];
+ GLubyte cx1 = texture_data[posxp1];
+ GLubyte cy1 = texture_data[posyp1];
+
+ if (alpha) {
+ GLubyte a = texture_data[dpos+1];
+ GLubyte ax1 = texture_data[posxp1+1];
+ GLubyte ay1 = texture_data[posyp1+1];
+
+ c = (c + a)/2;
+ cx1 = (cx1 + ax1)/2;
+ cy1 = (cy1 + ay1)/2;
+
+ map[mpos+3] = a;
+ }
+
+ map[mpos+0] = (128+(cx1-c)/2);
+ map[mpos+1] = (128+(cy1-c)/2);
+ map[mpos+2] = 127+int(brightness*128); // 255-c/2;
+
+ mpos += colors;
+ dpos += num_colors;
+ }
+ }
+
+ delete[] texture_data;
+ texture_data = map;
+ num_colors = colors;
+}
+
+
+void
+SGTexture::make_bumpmap(float brightness, float contrast) {
+ make_grayscale(contrast);
+
+ int colors = (num_colors == 1) ? 1 : 2;
+ GLubyte *map = new GLubyte[ texture_width * texture_height * colors ];
+
+ for (int y=0; y<texture_height; y++)
+ for (int x=0; x<texture_width; x++)
+ {
+ int mpos = (x + y*texture_width)*colors;
+ int dpos = (x + y*texture_width)*num_colors;
+
+ int xp1 = (x < (texture_width-1)) ? x+1 : 0;
+ int yp1 = (y < (texture_height-1)) ? y+1 : 0;
+ int posxp1 = (xp1 + y*texture_width)*num_colors;
+ int posyp1 = (x + yp1*texture_width)*num_colors;
+
+ map[mpos] = (127 - ((texture_data[dpos]-texture_data[posxp1]) -
+ ((texture_data[dpos]-texture_data[posyp1]))/4))/2;
+ if (colors > 1)
+ map[mpos+1] = texture_data[dpos+1];
+ }
+
+ delete[] texture_data;
+ texture_data = map;
+ num_colors = colors;
+}
+
projects / simgear.git / blobdiff