Move the texture object to the screen directory for the sake of library dependencies

simgear/misc/Makefile.am

@@ -15,7 +15,6 @@ include_HEADERS = \
 	stopwatch.hxx \
 	strutils.hxx \
 	tabbed_values.hxx \
-	texture.hxx \
 	texcoord.hxx \
 	zfstream.hxx
 
@@ -28,7 +27,6 @@ libsgmisc_a_SOURCES = \
 	sgstream.cxx \
 	strutils.cxx \
 	tabbed_values.cxx \
-	texture.cxx \
 	texcoord.cxx \
 	zfstream.cxx
 

simgear/screen/Makefile.am

@@ -12,9 +12,14 @@ IMAGE_SERVER_INCL =
 IMAGE_SERVER_SRCS = 
 endif
 
-include_HEADERS = $(IMAGE_SERVER_INCL) screen-dump.hxx tr.h
+include_HEADERS = \
+	texture.hxx \
+	$(IMAGE_SERVER_INCL) \
+	screen-dump.hxx \
+	tr.h
 
 libsgscreen_a_SOURCES = \
+	texture.cxx \
 	GLBitmaps.cxx GLBitmaps.h \
 	$(IMAGE_SERVER_SRCS) \
 	screen-dump.cxx \

simgear/screen/texture.cxx

@@ -25,7 +25,7 @@ SGTexture::SGTexture()
 
 SGTexture::SGTexture(unsigned int width, unsigned int height)
 {
-    texture_data = new GLubyte[ width*height*3 ];
+    texture_data = new GLubyte[ width * height * 3 ];
 }
 
 SGTexture::~SGTexture()
@@ -275,8 +275,8 @@ SGTexture::read_raw_texture(const char *name)
 
     ptr = texture_data;
     for(y=0; y<256; y++) {
-                gzread(image->file, ptr, 256*3);
-                ptr+=256*3;
+        gzread(image->file, ptr, 256*3);
+        ptr+=256*3;
     }
     ImageClose(image);
 }
@@ -320,6 +320,28 @@ SGTexture::read_r8_texture(const char *name)
 }
 
 
+void
+SGTexture::set_pixel(GLuint x, GLuint y, sgVec3 &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];
+}
+
+
+sgVec3 *
+SGTexture::get_pixel(GLuint x, GLuint y)
+{
+    static sgVec3 c;
+    unsigned int pos = (x + y*texture_width)*3;
+
+    sgSetVec3(c, texture_data[pos], texture_data[pos+1], texture_data[pos+2]);
+
+    return &c;
+}
+
+
 SGTexture::ImageRec *
 SGTexture::ImageOpen(const char *fileName)
 {
@@ -493,6 +515,7 @@ SGTexture::ConvertShort(unsigned short *array, unsigned int length) {
     }
 }
 
+
 void
 SGTexture::ConvertUint(unsigned *array, unsigned int length) {
     unsigned int b1, b2, b3, b4;

simgear/screen/texture.hxx

@@ -5,6 +5,8 @@
 #include <GL/gl.h>
 #include <zlib.h>
 
+#include <plib/sg.h>
+
 class SGTexture {
 
 private:
@@ -64,9 +66,17 @@ public:
     inline int width() { return texture_width; }
     inline int height() { return texture_height; }
 
+    // dynamic texture functions.
+    // everything drawn to the OpenGL screen after prepare is
+    // called and before finish is called will be included
+    // in the new texture.
     void prepare(unsigned int width = 256, unsigned int height = 256);
     void finish(unsigned int width, unsigned int height);
 
+    // texture pixel manipulation functions.
+    void set_pixel(GLuint x, GLuint y, sgVec3 &c);
+    sgVec3 *get_pixel(GLuint x, GLuint y);
+
     void bind();
     inline void select() {
         // if (texture_data)