From: Ryan C. Gordon <icculus@icculus.org>
Date: Sat, 6 Aug 2005 16:55:53 +0000 (+0000)
Subject: Started removing DevIL dependency. PNG read support works now.
X-Git-Url: https://git.jsancho.org/?a=commitdiff_plain;h=ff50d2ebce620062b6988247293af3a7e3b7ab90;p=lugaru.git

Started removing DevIL dependency. PNG read support works now.
---

diff --git a/Source/Game.h b/Source/Game.h
index c4f033e..d5978de 100644
--- a/Source/Game.h
+++ b/Source/Game.h
@@ -10,14 +10,17 @@
 //#include <glut.h>
 
 #include "TGALoader.h"
-#ifdef WIN32
-#include "WinInput.h"
-#elif USE_SDL
+
+#if USE_SDL
 #include "SDL.h"
-#include "SDLInput.h"
+#endif
+
+#if !PLATFORM_MACOSX
+#include "WinInput.h"
 #else
 #include "Macinput.h"
 #endif
+
 #include "Terrain.h"
 #include "Skybox.h"
 #include "Skeleton.h"
diff --git a/Source/OpenGL_Windows.cpp b/Source/OpenGL_Windows.cpp
index 6535b95..302ec1d 100644
--- a/Source/OpenGL_Windows.cpp
+++ b/Source/OpenGL_Windows.cpp
@@ -4,9 +4,25 @@
 #endif
 
 #include "Game.h"
-#include "IL/il.h"
-#include "IL/ilu.h"
-#include "IL/ilut.h"
+
+#ifndef USE_DEVIL
+#  ifdef WIN32
+#    define USE_DEVIL
+#  endif
+#endif
+
+#if USE_DEVIL
+    #include "IL/il.h"
+    #include "IL/ilu.h"
+    #include "IL/ilut.h"
+#else
+    // just use libpng and libjpg directly; it's lighter-weight and easier
+    //  to manage the dependencies on Linux...
+    #include "png.h"
+    static bool load_image(const char * fname, TGAImageRec & tex);
+    static bool load_png(const char * fname, TGAImageRec & tex);
+    static bool load_jpg(const char * fname, TGAImageRec & tex);
+#endif
 
 // ADDED GWC
 #ifdef _MSC_VER
@@ -940,6 +956,7 @@ Boolean SetUp (Game & game)
 	glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 	glAlphaFunc( GL_GREATER, 0.5f);
 
+#if USE_DEVIL
 	if (ilGetInteger(IL_VERSION_NUM) < IL_VERSION ||
 		iluGetInteger(ILU_VERSION_NUM) < ILU_VERSION ||
 		ilutGetInteger(ILUT_VERSION_NUM) < ILUT_VERSION)
@@ -956,6 +973,7 @@ Boolean SetUp (Game & game)
 
 	ilEnable(IL_ORIGIN_SET);
 	ilOriginFunc(IL_ORIGIN_LOWER_LEFT);
+#endif
 
 	GLint width = kContextWidth;
 	GLint height = kContextHeight;
@@ -1154,7 +1172,9 @@ void CleanUp (void)
 
 //	game.Dispose();
 
+#if USE_DEVIL
 	ilShutDown();
+#endif
 
 #if USE_SDL
     SDL_Quit();
@@ -2096,6 +2116,7 @@ int main (void)
 			return false;
 		}
 
+        #if USE_DEVIL
 		ILstring f = strdup(ConvertFileName(fname));
 		if (!f)
 		{
@@ -2152,12 +2173,17 @@ int main (void)
 		}
 */
 		free(f);
+        #else
+        res = load_image(fname, tex);
+        if (!res) STUBBED("load_image() failed!");
+        #endif
 
 		return res;
 	}
 
 	void ScreenShot(const char * fname)
 	{
+        #if USE_DEVIL
 		ILstring f = strdup(fname);
 		if (!f)
 		{
@@ -2174,6 +2200,122 @@ int main (void)
 		ilDeleteImages(1, &iid);
 
 		free(f);
+        #else
+        STUBBED("Non-DevIL screenshot");
+        #endif
 	}
 
 
+#if !USE_DEVIL
+static bool load_image(const char *file_name, TGAImageRec &tex)
+{
+    char *ptr = strrchr(file_name, '.');
+    if (ptr)
+    {
+        if (stricmp(ptr+1, "png") == 0)
+            return load_png(file_name, tex);
+        else if (stricmp(ptr+1, "jpg") == 0)
+            return load_jpg(file_name, tex);
+    }
+
+    STUBBED("Unsupported image type");
+    return false;
+}
+
+static bool load_jpg(const char *file_name, TGAImageRec &tex)
+{
+    // !!! FIXME: write this.
+    STUBBED("load_jpg");
+    return false;
+}
+
+/* stolen from public domain example.c code in libpng distribution. */
+static bool load_png(const char *file_name, TGAImageRec &tex)
+{
+    bool hasalpha = false;
+    png_structp png_ptr = NULL;
+    png_infop info_ptr = NULL;
+    png_uint_32 width, height;
+    int bit_depth, color_type, interlace_type;
+    png_byte **rows = NULL;
+    bool retval = false;
+    png_byte **row_pointers = NULL;
+    FILE *fp = fopen(file_name, "rb");
+
+    if (fp == NULL)
+        return(NULL);
+
+    png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+    if (png_ptr == NULL)
+        goto png_done;
+
+    info_ptr = png_create_info_struct(png_ptr);
+    if (info_ptr == NULL)
+        goto png_done;
+
+    if (setjmp(png_jmpbuf(png_ptr)))
+        goto png_done;
+
+    png_init_io(png_ptr, fp);
+    png_read_png(png_ptr, info_ptr,
+                 PNG_TRANSFORM_STRIP_16 | PNG_TRANSFORM_PACKING,
+                 png_voidp_NULL);
+    png_get_IHDR(png_ptr, info_ptr, &width, &height,
+                 &bit_depth, &color_type, &interlace_type, NULL, NULL);
+
+    if (bit_depth != 8)  // transform SHOULD handle this...
+        goto png_done;
+
+    if (color_type & PNG_COLOR_MASK_PALETTE)  // !!! FIXME?
+        goto png_done;
+
+    if ((color_type & PNG_COLOR_MASK_COLOR) == 0)  // !!! FIXME?
+        goto png_done;
+
+    hasalpha = ((color_type & PNG_COLOR_MASK_ALPHA) != 0);
+    row_pointers = png_get_rows(png_ptr, info_ptr);
+    if (!row_pointers)
+        goto png_done;
+
+    retval = malloc(width * height * 4);
+    if (!retval)
+        goto png_done;
+
+    if (!hasalpha)
+    {
+        png_byte *dst = tex.data;
+        for (int i = height-1; i >= 0; i--)
+        {
+            png_byte *src = row_pointers[i];
+            for (int j = 0; j < width; j++)
+            {
+                dst[0] = src[0];
+                dst[1] = src[1];
+                dst[2] = src[2];
+                dst[3] = 0xFF;
+                src += 3;
+                dst += 4;
+            }
+        }
+    }
+
+    else
+    {
+        png_byte *dst = tex.data;
+        int pitch = width * 4;
+        for (int i = height-1; i >= 0; i--, dst += pitch)
+            memcpy(dst, row_pointers[i], pitch);
+    }
+
+    tex.sizeX = width;
+    tex.sizeY = height;
+    tex.bpp = 32;
+    retval = true;
+
+png_done:
+   png_destroy_read_struct(&png_ptr, &info_ptr, png_infopp_NULL);
+   fclose(fp);
+   return (retval);
+}
+#endif
+
diff --git a/makefile b/makefile
index e838ed8..a85cc9b 100644
--- a/makefile
+++ b/makefile
@@ -1,10 +1,13 @@
 
 macosx := false
+use_devil := false
 
 BINDIR := bin
 RUNDIR := run
 SRCDIR := Source
 SDLDIR := SDL12
+LIBPNGDIR := libpng-1.2.8
+ZLIBDIR := zlib-1.2.3
 
 EXE := $(RUNDIR)/lugaru-bin
 
@@ -33,11 +36,18 @@ DEFINES := \
 	-Dstricmp=strcasecmp \
 
 INCLUDES := \
-			-I./SDL12/include \
+			-I$(SRCDIR) \
+			-I$(SDLDIR)/include \
 			-I./OpenGL/ \
 			-I./OpenGL/GL \
-			-I$(SRCDIR) \
-			-I$(SRCDIR)/devil/include \
+
+ifeq ($(strip $(use_devil)),true)
+    DEFINES += -DUSE_DEVIL=1
+	INCLUDES += -I$(SRCDIR)/devil/include
+else
+    DEFINES += -DZ_PREFIX=1
+    INCLUDES += -I$(ZLIBDIR) -I$(LIBPNGDIR)
+endif
 
 CFLAGS := -g -c $(OPT) $(INCLUDES) $(DEFINES) -fsigned-char
 CFLAGS += -w
@@ -50,7 +60,11 @@ ifeq ($(strip $(macosx)),true)
 else
   CFLAGS += -DPLATFORM_LINUX=1
   #CFLAGS += -msse -mmmx
-  LDFLAGS := ./libSDL-1.2.so.0 -lGL -lGLU ./libfmod.so ./libIL.so.1 ./libILU.so.1 ./libILUT.so.1
+  LDFLAGS := ./libSDL-1.2.so.0 -lGL -lGLU ./libfmod.so
+
+  ifeq ($(strip $(use_devil)),true)
+    LDFLAGS += ./libIL.so.1 ./libILU.so.1 ./libILUT.so.1
+  endif
 endif
 
 CXXFLAGS := $(CFLAGS)
@@ -86,6 +100,51 @@ SRCS := \
 	WinInput.cpp \
 	OpenGL_Windows.cpp \
 
+SRCS := $(foreach f,$(SRCS),$(SRCDIR)/$(f))
+
+
+IMGSRCS := \
+    png.c \
+    pngerror.c \
+    pnggccrd.c \
+    pngget.c \
+    pngmem.c \
+    pngpread.c \
+    pngread.c \
+    pngrio.c \
+    pngrtran.c \
+    pngrutil.c \
+    pngset.c \
+    pngtrans.c \
+    pngvcrd.c \
+    pngwio.c \
+    pngwrite.c \
+    pngwtran.c \
+    pngwutil.c \
+
+IMGSRCS := $(foreach f,$(IMGSRCS),$(LIBPNGDIR)/$(f))
+
+
+ZLIBSRCS = \
+	adler32.c \
+	compress.c \
+	crc32.c \
+	deflate.c \
+	gzio.c \
+	infback.c \
+	inffast.c \
+	inflate.c \
+	inftrees.c \
+	trees.c \
+	uncompr.c \
+	zutil.c \
+
+ZLIBSRCS := $(foreach f,$(ZLIBSRCS),$(ZLIBDIR)/$(f))
+
+
+ifneq ($(strip $(use_devil)),true)
+    SRCS += $(IMGSRCS) $(ZLIBSRCS)
+endif
 
 OBJS := $(SRCS:.CC=.o)
 OBJS := $(OBJS:.cc=.o)
@@ -93,26 +152,25 @@ OBJS := $(OBJS:.cpp=.o)
 OBJS := $(OBJS:.c=.o)
 OBJS := $(OBJS:.m=.o)
 OBJS := $(foreach f,$(OBJS),$(BINDIR)/$(f))
-SRCS := $(foreach f,$(SRCS),$(SRCDIR)/$(f))
 
 
 .PHONY: clean all
 
 all : $(EXE)
 
-$(BINDIR)/%.o : $(SRCDIR)/%.cpp
+$(BINDIR)/%.o : %.cpp
 	$(CXX) -o $@ $(CXXFLAGS) $<
 
-$(BINDIR)/%.o : $(SRCDIR)/%.CC
+$(BINDIR)/%.o : %.CC
 	$(CXX) -o $@ $(CXXFLAGS) $<
 
-$(BINDIR)/%.o : $(SRCDIR)/%.cc
+$(BINDIR)/%.o : %.cc
 	$(CXX) -o $@ $(CXXFLAGS) $<
 
-$(BINDIR)/%.o : $(SRCDIR)/%.m
+$(BINDIR)/%.o : %.m
 	$(CC) -o $@ $(CFLAGS) $<
 
-$(BINDIR)/%.o : $(SRCDIR)/%.c
+$(BINDIR)/%.o : %.c
 	$(CC) -o $@ $(CFLAGS) $<
 
 $(EXE) : $(OBJS) $(APPOBJS)
@@ -123,9 +181,12 @@ endif
 	$(LD) -o $@ $(APPLDFLAGS) $(LDFLAGS) $(OBJS) $(APPOBJS)
 
 clean:
-	rm -rf $(BINDIR)/*.o
-	rm -rf $(BINDIR)/logger/*.o
-	rm -rf $(EXE)
+	rm -f $(BINDIR)/*.o
+	rm -f $(BINDIR)/$(SRCDIR)/*.o
+	rm -f $(BINDIR)/$(SRCDIR)/logger/*.o
+	rm -f $(BINDIR)/$(LIBPNGDIR)/*.o
+	rm -f $(BINDIR)/$(ZLIBDIR)/*.o
+	rm -f $(EXE)
 
 # end of makefile ...