e4790aef46
http://www.continuousphysics.com/ftp/pub/test/index.php?dir=blender/&file=demos-2.42.zip patch by Charlie Carley (snailrose @ elysiun.com)
639 lines
15 KiB
C++
639 lines
15 KiB
C++
// ------------------------------------
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#ifdef WIN32
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#include <windows.h>
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#endif // WIN32
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#ifdef __APPLE__
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#define GL_GLEXT_LEGACY 1
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#include <OpenGL/gl.h>
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#include <OpenGL/glu.h>
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#else
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#include <GL/gl.h>
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#include <GL/glu.h>
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#endif
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#include <iostream>
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#include "BL_Material.h"
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#include "BL_Texture.h"
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#include "MT_assert.h"
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#include "DNA_texture_types.h"
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#include "DNA_image_types.h"
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#include "IMB_imbuf_types.h"
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#include "BKE_image.h"
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#include "BLI_blenlib.h"
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#include "RAS_OpenGLRasterizer/RAS_GLExtensionManager.h"
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#include "RAS_OpenGLRasterizer/ARB_multitexture.h"
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#include "RAS_ICanvas.h"
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#include "RAS_Rect.h"
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#include "KX_GameObject.h"
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using namespace bgl;
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#define spit(x) std::cout << x << std::endl;
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#include "MEM_guardedalloc.h"
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extern "C" {
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// envmaps
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#include "IMB_imbuf.h"
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void my_envmap_split_ima(EnvMap *env);
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void my_free_envmapdata(EnvMap *env);
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}
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// (n&(n-1)) zeros the least significant bit of n
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static int is_pow2(int num) {
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return ((num)&(num-1))==0;
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}
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static int smaller_pow2(int num) {
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while (!is_pow2(num))
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num= num&(num-1);
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return num;
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}
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BL_Texture::BL_Texture()
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: mTexture(0),
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mError(0),
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mOk(0),
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mNeedsDeleted(0),
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mType(0),
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mName(""),
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mUnit(0)
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{
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// --
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}
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BL_Texture::~BL_Texture()
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{
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// --
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}
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void BL_Texture::DeleteTex()
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{
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if( mNeedsDeleted ) {
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glDeleteTextures(1, (GLuint*)&mTexture);
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mNeedsDeleted = 0;
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mOk = 0;
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}
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}
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bool BL_Texture::InitFromImage(int unit, Image *img, bool mipmap)
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{
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if(!img || img->ok==0 ) {
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mError = true;
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mOk = false;
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return mOk;
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}
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if( img->ibuf==0 ) {
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load_image(img, IB_rect, "", 0);
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if(img->ibuf==0) {
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img->ok = 0;
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mError = true;
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mOk = false;
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return mOk;
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}
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}
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mTexture = img->bindcode;
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mName = img->id.name;
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mType = GL_TEXTURE_2D;
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mUnit = unit;
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// smoke em if we got em
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if (mTexture != 0) {
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glBindTexture(GL_TEXTURE_2D, mTexture );
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Validate();
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return mOk;
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}
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mNeedsDeleted = 1;
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glGenTextures(1, (GLuint*)&mTexture);
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InitGLTex(img->ibuf->rect, img->ibuf->x, img->ibuf->y, mipmap);
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Validate();
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return mOk;
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}
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void BL_Texture::InitGLTex(unsigned int *pix,int x,int y,bool mipmap)
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{
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if (!is_pow2(x) || !is_pow2(y) ) {
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InitNonPow2Tex(pix, x,y,mipmap);
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return;
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}
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glBindTexture(GL_TEXTURE_2D, mTexture );
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if( mipmap ) {
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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gluBuild2DMipmaps( GL_TEXTURE_2D, GL_RGBA, x, y, GL_RGBA, GL_UNSIGNED_BYTE, pix );
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}
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else {
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, x, y, 0, GL_RGBA, GL_UNSIGNED_BYTE, pix );
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}
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glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
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}
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void BL_Texture::InitNonPow2Tex(unsigned int *pix,int x,int y,bool mipmap)
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{
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int nx= smaller_pow2(x);
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int ny= smaller_pow2(y);
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unsigned int *newPixels = (unsigned int *)malloc(nx*ny*sizeof(unsigned int));
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gluScaleImage(GL_RGBA, x, y, GL_UNSIGNED_BYTE, pix, nx,ny, GL_UNSIGNED_BYTE, newPixels);
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glBindTexture(GL_TEXTURE_2D, mTexture );
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if( mipmap ) {
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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gluBuild2DMipmaps( GL_TEXTURE_2D, GL_RGBA, nx, ny, GL_RGBA, GL_UNSIGNED_BYTE, newPixels );
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}
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else {
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, nx, ny, 0, GL_RGBA, GL_UNSIGNED_BYTE, newPixels );
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}
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glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
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free(newPixels);
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}
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bool BL_Texture::InitCubeMap(int unit, EnvMap *cubemap )
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{
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#ifdef GL_ARB_texture_cube_map
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if(!RAS_EXT_support._ARB_texture_cube_map) {
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spit("cubemaps not supported");
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mError = true;
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mOk = false;
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return mOk;
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}
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else if(!cubemap || cubemap->ima->ok==0 ) {
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mError = true;
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mOk = false;
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return mOk;
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}
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if( cubemap->ima->ibuf==0 ) {
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load_image(cubemap->ima, IB_rect, "", 0);
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if(cubemap->ima->ibuf==0) {
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cubemap->ima->ok = 0;
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mError = true;
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mOk = false;
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return mOk;
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}
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}
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EnvMap *CubeMap = cubemap;
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mNeedsDeleted = 1;
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mType = GL_TEXTURE_CUBE_MAP_ARB;
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mTexture = 0;
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mName = CubeMap->ima->id.name;
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mUnit = unit;
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glGenTextures(1, (GLuint*)&mTexture);
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glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, mTexture );
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bool needs_split = false;
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if(!CubeMap->cube[0]) needs_split = true;
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if(needs_split){
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// split it
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my_envmap_split_ima(CubeMap);
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}
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int x = CubeMap->ima->ibuf->x;
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int y = CubeMap->ima->ibuf->y;
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// -----------------------------------
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x = CubeMap->cube[0]->ibuf->x;
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y = CubeMap->cube[0]->ibuf->y;
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// check the first image, and assume the rest
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if (!is_pow2(x) || !is_pow2(y)) {
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spit("invalid envmap size please render with CubeRes @ power of two");
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my_free_envmapdata(CubeMap);
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mError = true;
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mOk = false;
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return mOk;
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}
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/*
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*/
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#define SetCubeMapFace(face, num) \
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glTexImage2D(face, 0,GL_RGBA, \
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CubeMap->cube[num]->ibuf->x, \
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CubeMap->cube[num]->ibuf->y, \
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0, GL_RGBA, GL_UNSIGNED_BYTE, \
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CubeMap->cube[num]->ibuf->rect)
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SetCubeMapFace(GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB, 5);
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SetCubeMapFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB, 3);
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SetCubeMapFace(GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB, 0);
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SetCubeMapFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB, 1);
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SetCubeMapFace(GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB, 2);
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SetCubeMapFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB, 4);
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glTexParameteri( GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
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glTexParameteri( GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
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glTexParameteri( GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_S, GL_REPEAT );
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glTexParameteri( GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_T, GL_REPEAT );
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if(needs_split) {
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cubemap->ima = CubeMap->ima;
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my_free_envmapdata(CubeMap);
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}
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mOk = IsValid();
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return mOk;
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#else
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mError = true;
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mOk = false;
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return mOk;
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#endif//GL_ARB_texture_cube_map
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}
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STR_String BL_Texture::GetName() const
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{
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return mName;
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}
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bool BL_Texture::IsValid()
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{
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return (mTexture!= 0)?glIsTexture(mTexture)!=0:false;
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}
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void BL_Texture::Validate()
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{
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mOk = IsValid();
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}
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bool BL_Texture::Ok()
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{
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return (mTexture!= 0);
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}
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unsigned int BL_Texture::GetTextureType() const
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{
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return mType;
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}
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int BL_Texture::GetMaxUnits()
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{
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GLint unit=0;
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#ifdef GL_ARB_multitexture
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if(RAS_EXT_support._ARB_multitexture) {
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glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &unit);
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return (MAXTEX>=unit?unit:MAXTEX);
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}
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#endif
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return 0;
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}
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void BL_Texture::ActivateFirst()
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{
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#ifdef GL_ARB_multitexture
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if(RAS_EXT_support._ARB_multitexture)
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bgl::blActiveTextureARB(GL_TEXTURE0_ARB);
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#endif
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}
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void BL_Texture::ActivateUnit(int unit)
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{
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#ifdef GL_ARB_multitexture
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if(RAS_EXT_support._ARB_multitexture) {
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if(unit <= MAXTEX)
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bgl::blActiveTextureARB(GL_TEXTURE0_ARB+unit);
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}
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#endif
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}
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void BL_Texture::DisableUnit()
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{
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#ifdef GL_ARB_multitexture
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if(RAS_EXT_support._ARB_multitexture)
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bgl::blActiveTextureARB(GL_TEXTURE0_ARB+mUnit);
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#endif
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glMatrixMode(GL_TEXTURE);
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glLoadIdentity();
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glMatrixMode(GL_MODELVIEW);
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#ifdef GL_ARB_texture_cube_map
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if(RAS_EXT_support._ARB_texture_cube_map)
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glDisable(GL_TEXTURE_CUBE_MAP_ARB);
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#endif
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glDisable(GL_TEXTURE_2D);
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glDisable(GL_TEXTURE_GEN_S);
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glDisable(GL_TEXTURE_GEN_T);
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glDisable(GL_TEXTURE_GEN_R);
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glDisable(GL_TEXTURE_GEN_Q);
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glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
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}
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void BL_Texture::DisableAllTextures()
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{
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#ifdef GL_ARB_multitexture
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glDisable(GL_BLEND);
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for(int i=0; i<MAXTEX; i++) {
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if(RAS_EXT_support._ARB_multitexture)
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bgl::blActiveTextureARB(GL_TEXTURE0_ARB+i);
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glMatrixMode(GL_TEXTURE);
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glLoadIdentity();
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glMatrixMode(GL_MODELVIEW);
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#ifdef GL_ARB_texture_cube_map
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if(RAS_EXT_support._ARB_texture_cube_map)
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glDisable(GL_TEXTURE_CUBE_MAP_ARB);
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#endif//GL_ARB_texture_cube_map
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glDisable(GL_TEXTURE_2D);
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glDisable(GL_TEXTURE_GEN_S);
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glDisable(GL_TEXTURE_GEN_T);
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glDisable(GL_TEXTURE_GEN_R);
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glDisable(GL_TEXTURE_GEN_Q);
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glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
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}
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#endif
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}
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void BL_Texture::ActivateTexture()
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{
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#ifdef GL_ARB_multitexture
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if(RAS_EXT_support._ARB_multitexture)
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bgl::blActiveTextureARB(GL_TEXTURE0_ARB+mUnit);
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#ifdef GL_ARB_texture_cube_map
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if(mType == GL_TEXTURE_CUBE_MAP_ARB && RAS_EXT_support._ARB_texture_cube_map ) {
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glDisable(GL_TEXTURE_2D);
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glBindTexture( GL_TEXTURE_CUBE_MAP_ARB, mTexture );
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glEnable(GL_TEXTURE_CUBE_MAP_ARB);
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} else
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#endif
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{
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glDisable(GL_TEXTURE_CUBE_MAP_ARB);
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glBindTexture( GL_TEXTURE_2D, mTexture );
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glEnable(GL_TEXTURE_2D);
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}
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#endif
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}
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void BL_Texture::SetMapping(int mode)
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{
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if(!(mode &USEREFL)) {
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glDisable(GL_TEXTURE_GEN_S);
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glDisable(GL_TEXTURE_GEN_T);
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glDisable(GL_TEXTURE_GEN_R);
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glDisable(GL_TEXTURE_GEN_Q);
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return;
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}
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#ifdef GL_ARB_texture_cube_map
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if( mType == GL_TEXTURE_CUBE_MAP_ARB &&
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RAS_EXT_support._ARB_texture_cube_map &&
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mode &USEREFL)
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{
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glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB );
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glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB );
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glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB );
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glEnable(GL_TEXTURE_GEN_S);
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glEnable(GL_TEXTURE_GEN_T);
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glEnable(GL_TEXTURE_GEN_R);
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glDisable(GL_TEXTURE_GEN_Q);
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return;
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}
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else
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#endif
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{
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glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP );
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glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP );
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glEnable(GL_TEXTURE_GEN_S);
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glEnable(GL_TEXTURE_GEN_T);
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glDisable(GL_TEXTURE_GEN_R);
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glDisable(GL_TEXTURE_GEN_Q);
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}
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}
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void BL_Texture::setTexEnv(BL_Material *mat, bool modulate)
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{
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#ifndef GL_ARB_texture_env_combine
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glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
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return;
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#else
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if(modulate || !RAS_EXT_support._ARB_texture_env_combine){
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glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
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return;
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}
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glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB );
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GLfloat blend_operand = GL_SRC_COLOR;
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GLfloat blend_operand_prev = GL_SRC_COLOR;
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GLfloat alphaOp = GL_SRC_ALPHA;
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GLenum combiner = GL_COMBINE_RGB_ARB;
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GLenum source0 = GL_SOURCE0_RGB_ARB;
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GLenum source1 = GL_SOURCE1_RGB_ARB;
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GLenum source2 = GL_SOURCE2_RGB_ARB;
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GLenum op0 = GL_OPERAND0_RGB_ARB;
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GLenum op1 = GL_OPERAND1_RGB_ARB;
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GLenum op2 = GL_OPERAND2_RGB_ARB;
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// switch to alpha combiners
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if( mat->flag[mUnit] &TEXALPHA ) {
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combiner = GL_COMBINE_ALPHA_ARB;
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source0 = GL_SOURCE0_ALPHA_ARB;
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source1 = GL_SOURCE1_ALPHA_ARB;
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source2 = GL_SOURCE2_ALPHA_ARB;
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op0 = GL_OPERAND0_ALPHA_ARB;
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op1 = GL_OPERAND1_ALPHA_ARB;
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op2 = GL_OPERAND2_ALPHA_ARB;
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blend_operand = GL_SRC_ALPHA;
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blend_operand_prev = GL_SRC_ALPHA;
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// invert
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if(mat->flag[mUnit] &TEXNEG) {
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blend_operand_prev = GL_ONE_MINUS_SRC_ALPHA;
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blend_operand = GL_ONE_MINUS_SRC_ALPHA;
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}
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}
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else {
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if(mat->flag[mUnit] &TEXNEG) {
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blend_operand_prev=GL_ONE_MINUS_SRC_COLOR;
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blend_operand = GL_ONE_MINUS_SRC_COLOR;
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}
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}
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bool using_alpha = false;
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if(mat->flag[mUnit] &USEALPHA){
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alphaOp = GL_ONE_MINUS_SRC_ALPHA;
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using_alpha=true;
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}
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else if(mat->flag[mUnit] &USENEGALPHA){
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alphaOp = GL_SRC_ALPHA;
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using_alpha = true;
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}
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switch( mat->blend_mode[mUnit] ) {
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case BLEND_MIX:
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{
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// ------------------------------
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if(!using_alpha) {
|
|
GLfloat base_col[4];
|
|
base_col[0] = base_col[1] = base_col[2] = 0.f;
|
|
base_col[3] = 1.f-mat->color_blend[mUnit];
|
|
glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR,base_col );
|
|
}
|
|
glTexEnvf( GL_TEXTURE_ENV, combiner, GL_INTERPOLATE_ARB);
|
|
glTexEnvf( GL_TEXTURE_ENV, source0, GL_PREVIOUS_ARB);
|
|
glTexEnvf( GL_TEXTURE_ENV, op0, blend_operand_prev );
|
|
glTexEnvf( GL_TEXTURE_ENV, source1, GL_TEXTURE );
|
|
glTexEnvf( GL_TEXTURE_ENV, op1, blend_operand);
|
|
if(!using_alpha)
|
|
glTexEnvf( GL_TEXTURE_ENV, source2, GL_CONSTANT_ARB );
|
|
else
|
|
glTexEnvf( GL_TEXTURE_ENV, source2, GL_TEXTURE );
|
|
|
|
glTexEnvf( GL_TEXTURE_ENV, op2, alphaOp);
|
|
}break;
|
|
case BLEND_MUL:
|
|
{
|
|
// ------------------------------
|
|
glTexEnvf( GL_TEXTURE_ENV, combiner, GL_MODULATE);
|
|
glTexEnvf( GL_TEXTURE_ENV, source0, GL_PREVIOUS_ARB);
|
|
glTexEnvf( GL_TEXTURE_ENV, op0, blend_operand_prev);
|
|
glTexEnvf( GL_TEXTURE_ENV, source1, GL_TEXTURE );
|
|
if(using_alpha)
|
|
glTexEnvf( GL_TEXTURE_ENV, op1, alphaOp);
|
|
else
|
|
glTexEnvf( GL_TEXTURE_ENV, op1, blend_operand);
|
|
}break;
|
|
case BLEND_ADD:
|
|
{
|
|
// ------------------------------
|
|
glTexEnvf( GL_TEXTURE_ENV, combiner, GL_ADD_SIGNED_ARB);
|
|
glTexEnvf( GL_TEXTURE_ENV, source0, GL_PREVIOUS_ARB );
|
|
glTexEnvf( GL_TEXTURE_ENV, op0, blend_operand_prev );
|
|
glTexEnvf( GL_TEXTURE_ENV, source1, GL_TEXTURE );
|
|
if(using_alpha)
|
|
glTexEnvf( GL_TEXTURE_ENV, op1, alphaOp);
|
|
else
|
|
glTexEnvf( GL_TEXTURE_ENV, op1, blend_operand);
|
|
}break;
|
|
case BLEND_SUB:
|
|
{
|
|
// ------------------------------
|
|
glTexEnvf( GL_TEXTURE_ENV, combiner, GL_SUBTRACT_ARB);
|
|
glTexEnvf( GL_TEXTURE_ENV, source0, GL_PREVIOUS_ARB );
|
|
glTexEnvf( GL_TEXTURE_ENV, op0, blend_operand_prev );
|
|
glTexEnvf( GL_TEXTURE_ENV, source1, GL_TEXTURE );
|
|
glTexEnvf( GL_TEXTURE_ENV, op1, blend_operand);
|
|
}break;
|
|
case BLEND_SCR:
|
|
{
|
|
// ------------------------------
|
|
glTexEnvf( GL_TEXTURE_ENV, combiner, GL_ADD);
|
|
glTexEnvf( GL_TEXTURE_ENV, source0, GL_PREVIOUS_ARB );
|
|
glTexEnvf( GL_TEXTURE_ENV, op0, blend_operand_prev );
|
|
glTexEnvf( GL_TEXTURE_ENV, source1, GL_TEXTURE );
|
|
if(using_alpha)
|
|
glTexEnvf( GL_TEXTURE_ENV, op1, alphaOp);
|
|
else
|
|
glTexEnvf( GL_TEXTURE_ENV, op1, blend_operand);
|
|
} break;
|
|
}
|
|
glTexEnvf( GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1.0);
|
|
#endif //!GL_ARB_texture_env_combine
|
|
}
|
|
|
|
int BL_Texture::GetPow2(int n)
|
|
{
|
|
if(!is_pow2(n))
|
|
n = smaller_pow2(n);
|
|
|
|
return n;
|
|
}
|
|
|
|
extern "C" {
|
|
|
|
void my_envmap_split_ima(EnvMap *env)
|
|
{
|
|
ImBuf *ibuf;
|
|
Image *ima;
|
|
int dx, part;
|
|
|
|
my_free_envmapdata(env);
|
|
|
|
dx= env->ima->ibuf->y;
|
|
dx/= 2;
|
|
if(3*dx != env->ima->ibuf->x) {
|
|
printf("Incorrect envmap size\n");
|
|
env->ok= 0;
|
|
env->ima->ok= 0;
|
|
}
|
|
else {
|
|
for(part=0; part<6; part++) {
|
|
ibuf= IMB_allocImBuf(dx, dx, 24, IB_rect, 0);
|
|
ima= (Image*)MEM_callocN(sizeof(Image), "image");
|
|
ima->ibuf= ibuf;
|
|
ima->ok= 1;
|
|
env->cube[part]= ima;
|
|
}
|
|
IMB_rectcpy(env->cube[0]->ibuf, env->ima->ibuf,
|
|
0, 0, 0, 0, dx, dx);
|
|
IMB_rectcpy(env->cube[1]->ibuf, env->ima->ibuf,
|
|
0, 0, dx, 0, dx, dx);
|
|
IMB_rectcpy(env->cube[2]->ibuf, env->ima->ibuf,
|
|
0, 0, 2*dx, 0, dx, dx);
|
|
IMB_rectcpy(env->cube[3]->ibuf, env->ima->ibuf,
|
|
0, 0, 0, dx, dx, dx);
|
|
IMB_rectcpy(env->cube[4]->ibuf, env->ima->ibuf,
|
|
0, 0, dx, dx, dx, dx);
|
|
IMB_rectcpy(env->cube[5]->ibuf, env->ima->ibuf,
|
|
0, 0, 2*dx, dx, dx, dx);
|
|
env->ok= 2;
|
|
}
|
|
}
|
|
|
|
|
|
void my_free_envmapdata(EnvMap *env)
|
|
{
|
|
Image *ima;
|
|
unsigned int a, part;
|
|
|
|
for(part=0; part<6; part++) {
|
|
ima= env->cube[part];
|
|
if(ima) {
|
|
if(ima->ibuf) IMB_freeImBuf(ima->ibuf);
|
|
|
|
for(a=0; a<BLI_ARRAY_NELEMS(ima->mipmap); a++) {
|
|
if(ima->mipmap[a]) IMB_freeImBuf(ima->mipmap[a]);
|
|
}
|
|
MEM_freeN(ima);
|
|
env->cube[part]= 0;
|
|
}
|
|
}
|
|
env->ok= 0;
|
|
}
|
|
|
|
|
|
} // extern C
|
|
|