make headers include headers they depend on, don't rely on the c(xx)

[simgear.git] / simgear / screen / texture.hxx

diff --git a/simgear/screen/texture.hxx b/simgear/screen/texture.hxx
index 2a1b5c5c1c4dd8ceba401f512bc1295074c1d4c1..9f76cadbd2390a4dfc87cad67782ebef4dc39715 100644 (file)
--- a/simgear/screen/texture.hxx
+++ b/simgear/screen/texture.hxx
@@ -1,12 +1,28 @@
+/*
+ * \file texture.hxx
+ * Texture manipulation routines
+ *
+ * Copyright (c) Mark J. Kilgard, 1997.
+ * Code added in april 2003 by Erik Hofman
+ *
+ * This program is freely distributable without licensing fees 
+ * and is provided without guarantee or warrantee expressed or 
+ * implied. This program is -not- in the public domain.
+ */
 
 #ifndef __SG_TEXTURE_HXX
 #define __SG_TEXTURE_HXX 1
 
-#include <GL/gl.h>
+#include <simgear/compiler.h>
+#include SG_GL_H
 #include <zlib.h>
 
 #include <plib/sg.h>
 
+/**
+ * A class to encapsulate all the info surrounding an OpenGL texture
+ * and also query various info and load various file formats
+ */
 class SGTexture {
 
 private:
@@ -16,12 +32,17 @@ private:
 
     GLsizei texture_width;
     GLsizei texture_height;
+    GLsizei num_colors;
 
     void resize(unsigned int width = 256, unsigned int height = 256);
 
+    const char *errstr;
+
 protected:
 
+    FILE *file;
     typedef struct _ImageRec {
+        _ImageRec(void) : tmp(0), rowStart(0), rowSize(0) {}
         unsigned short imagic;
         unsigned short type;
         unsigned short dim;
@@ -40,11 +61,25 @@ protected:
     void ConvertUint(unsigned *array, unsigned int length);
     void ConvertShort(unsigned short *array, unsigned int length);
     void rgbtorgb(GLubyte *r, GLubyte *g, GLubyte *b, GLubyte *l, int n);
+    void rgbatorgba(GLubyte *r, GLubyte *g, GLubyte *b, GLubyte *a,
+                    GLubyte *l, int n);
 
     ImageRec *ImageOpen(const char *fileName);
+    ImageRec *ImageWriteOpen(const char *fileName);
     ImageRec *RawImageOpen(const char *fileName);
     void ImageClose(ImageRec *image);
     void ImageGetRow(ImageRec *image, GLubyte *buf, int y, int z);
+    void ImagePutRow(ImageRec *image, GLubyte *buf, int y, int z);
+
+    inline void free_id() {
+#ifdef GL_VERSION_1_1
+        glDeleteTextures(1, &texture_id);
+#else
+        glDeleteTexturesEXT(1, &texture_id);
+#endif
+        texture_id = 0;
+    }
+
 
 public:
 
@@ -55,16 +90,21 @@ public:
     /* Copyright (c) Mark J. Kilgard, 1997.  */
     void read_alpha_texture(const char *name);
     void read_rgb_texture(const char *name);
+    void read_rgba_texture(const char *name);
     void read_raw_texture(const char *name);
     void read_r8_texture(const char *name);
+    void write_texture(const char *name);
 
-    inline bool usable() { return texture_data ? true : false; }
+    inline bool usable() { return (texture_id > 0) ? true : false; }
 
     inline GLuint id() { return texture_id; }
     inline GLubyte *texture() { return texture_data; }
+    inline void set_data(GLubyte *data) { texture_data = data; }
+    // inline void set_colors(int c) { num_colors = c; }
 
     inline int width() { return texture_width; }
     inline int height() { return texture_height; }
+    inline int colors() { return num_colors; }
 
     // dynamic texture functions.
     // everything drawn to the OpenGL screen after prepare is
@@ -74,16 +114,39 @@ public:
     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 set_pixel(GLuint x, GLuint y, GLubyte *c);
+    GLubyte *get_pixel(GLuint x, GLuint y);
 
     void bind();
-    inline void select() {
-        // if (texture_data)
-            glTexImage2D( GL_TEXTURE_2D, 0, GL_RGB,
-                          texture_width, texture_height, 0,
-                          GL_RGB, GL_UNSIGNED_BYTE, texture_data );
+    inline void select(bool keep_data = false) {
+        glTexImage2D( GL_TEXTURE_2D, 0, num_colors,
+                      texture_width, texture_height, 0,
+                      (num_colors==1)?GL_LUMINANCE:(num_colors==3)?GL_RGB:GL_RGBA, GL_UNSIGNED_BYTE, texture_data );
+
+        if (!keep_data) {
+            delete[] texture_data;
+            texture_data = 0;
+        }
     }
+
+    // Nowhere does it say that resident textures have to be in video memory!
+    // NVidia's OpenGL drivers implement glAreTexturesResident() correctly,
+    // but the Matrox G400, for example, doesn't.
+    inline bool is_resident() {
+        GLboolean is_res;
+        glAreTexturesResident(1, &texture_id, &is_res);
+        return is_res != 0;
+    }
+
+    inline const char *err_str() { return errstr; }
+    inline void clear_err_str() { errstr = ""; }
+
+    void make_maxcolorwindow();
+    void make_grayscale(float contrast = 1.0);
+    void make_monochrome(float contrast = 1.0,
+                         GLubyte r=255, GLubyte g=255, GLubyte b=255);
+    void make_normalmap(float brightness = 1.0, float contrast = 1.0);
+    void make_bumpmap(float brightness = 1.0, float contrast = 1.0);
 };
 
 #endif