From 5cc874802b0b8c4462e7e873654e6daa54be00de Mon Sep 17 00:00:00 2001
From: pixel <pixel>
Date: Sun, 4 Jul 2004 11:56:18 +0000
Subject: SOL Demo

---
 lib/texture.cc | 50 +++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 45 insertions(+), 5 deletions(-)

(limited to 'lib/texture.cc')

diff --git a/lib/texture.cc b/lib/texture.cc
index a8036bc..42c8f3f 100644
--- a/lib/texture.cc
+++ b/lib/texture.cc
@@ -17,7 +17,7 @@ mogltk::texture * mogltk::texture::footer = 0;
 mogltk::texture * mogltk::texture::active = 0;
 
 mogltk::texture::texture(int w, int h, bool plane) throw (GeneralException) : width(w), height(h),
-    texture_allocated(false), planar(plane), tainted(true) {
+    texture_allocated(false), planar(plane), tainted(true), taintable(true) {
     if ((!ISPOT(w)) || (!ISPOT(h)))
 	throw GeneralException(_("Size of the texture not a power of 2!"));
     
@@ -51,7 +51,7 @@ mogltk::texture::texture(int w, int h, bool plane) throw (GeneralException) : wi
 }
 
 mogltk::texture::texture(Handle * h, bool plane) throw (GeneralException) :
-    texture_allocated(false), planar(plane), tainted(true) {
+    texture_allocated(false), planar(plane), tainted(true), taintable(true) {
 
     SDL_Surface * temp;
     
@@ -114,6 +114,34 @@ mogltk::texture::texture(Handle * h, bool plane) throw (GeneralException) :
     }
 }
 
+inline static unsigned int nextpower(unsigned int n) {
+    unsigned int i;
+
+    if (!n)
+        return n;
+
+    if (ISPOT(n))
+        return n;
+
+    for (i = 31; i >= 0; i--) {
+        if ((n >> i) & 1) {
+            return 1 << (i + 1);
+        }
+    }
+}
+
+mogltk::texture::texture(int x, int y, int w, int h) throw (GeneralException) : width(nextpower(w)), height(nextpower(h)),
+    texture_allocated(true), planar(false), tainted(false), taintable(false) {
+    glGenTextures(1, &tex);
+    glBindTexture(GL_TEXTURE_2D, tex);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, x, y, w, h);
+}
+
 mogltk::texture::~texture() {
     if (surface) {
 	SDL_FreeSurface(surface);
@@ -141,7 +169,10 @@ mogltk::texture::~texture() {
 }
 
 Uint32 * mogltk::texture::GetPixels() {
-    return (Uint32 *) surface->pixels;
+    if (surface)
+        return (Uint32 *) surface->pixels;
+    else
+        return 0;
 }
 
 SDL_Surface * mogltk::texture::GetSurface() {
@@ -149,7 +180,10 @@ SDL_Surface * mogltk::texture::GetSurface() {
 }
 
 SDL_PixelFormat * mogltk::texture::GetFormat() {
-    return surface->format;
+    if (surface)
+        return surface->format;
+    else
+        return 0;
 }
 
 void mogltk::texture::Generate() {
@@ -245,7 +279,8 @@ void mogltk::texture::Unbind(void) {
 }
 
 void mogltk::texture::Taint(void) {
-    tainted = true;
+    if (taintable)
+        tainted = true;
 }
 
 void mogltk::texture::Taintall(void) {
@@ -298,3 +333,8 @@ SDL_Surface * mogltk::texture::LoadNTEX(Handle * h) throw (GeneralException) {
     
     return r;
 }
+
+void mogltk::texture::DumpBMP(const String & n) {
+    if (surface)
+        SDL_SaveBMP(surface, n.to_charp());
+}
-- 
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