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force backgrond images to power of 2

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git-svn-id: https://svn.code.sf.net/p/speed-dreams/code/trunk@1943 30fe4595-0a0c-4342-8851-515496e4dcbd

Former-commit-id: f0231441216b74521a7d7e64221e7fec10547f7a
Former-commit-id: dd20c660149fec47e5787e855120fa300a27fce1
This commit is contained in:
briangr 2009-12-06 00:39:40 +00:00
parent 574576aae0
commit ce67238949
3 changed files with 75 additions and 5 deletions
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9
src/libs/tgfclient/gui.cpp
View file

@ -203,6 +203,7 @@ GfuiDisplay(void)
glColor3f(GfuiColor[GFUI_BASECOLORBGIMAGE][0],GfuiColor[GFUI_BASECOLORBGIMAGE][1],GfuiColor[GFUI_BASECOLORBGIMAGE][2]);
glBindTexture(GL_TEXTURE_2D, GfuiScreen->bgImage);
glBegin(GL_QUADS);
glTexCoord2f(tx1, ty1); glVertex3f(0.0, 0.0, 0.0);
glTexCoord2f(tx1, ty2); glVertex3f(0.0, GfuiScreen->height, 0.0);
glTexCoord2f(tx2, ty2); glVertex3f(GfuiScreen->width, GfuiScreen->height, 0.0);
@ -997,12 +998,10 @@ GfuiScreenAddBgImg(void *scr, const char *filename)
return;
}
glGenTextures(1, &screen->bgImage);
glBindTexture(GL_TEXTURE_2D, screen->bgImage);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, (GLvoid *)(tex));
//Force Background image to power of 2
GfScaleImagePowerof2((unsigned char*)tex,w,h,GL_RGBA,screen->bgImage);
free(tex);
GfParmReleaseHandle(handle);
}

70
src/libs/tgfclient/img.cpp
View file

@ -36,11 +36,81 @@
#ifdef WIN32
#include <direct.h>
#endif
#include "GL/Glu.h"
static char buf[1024];
#define PNG_BYTES_TO_CHECK 4
unsigned char *
GfScaleImage(unsigned char *pSrcImg,int srcW,int srcH,int destW,int destH,GLenum format)
{
unsigned char *pData = NULL;
gluScaleImage(format, srcW,srcH,GL_BYTE,pSrcImg,destW,destH,GL_BYTE,pData);
return pData;
}
int GetClosestPowerof2(int Size)
{
int sizes[8] = {2,4,16,128,256,512,1024,2048 };
for (int i=0;i<8;i++)
{
if (Size<=sizes[i])
return sizes[i];
}
//Do not allow textures larger then this for memory usage reasons
return 2048;
}
void
GfScaleImagePowerof2(unsigned char *pSrcImg,int srcW,int srcH,GLenum format,GLuint &texId)
{
int destH = 128;
int destW = 128;
destH = GetClosestPowerof2(srcH);
destW = GetClosestPowerof2(srcW);
if ((destH!=srcH)||(destW!=srcW))
{
unsigned char *texData = NULL;
if (format == GL_RGB)
{
texData = new unsigned char[destW*destH*3];
}
else if(format == GL_RGBA)
{
texData = new unsigned char[destW*destH*4];
}
int r = gluScaleImage( format, srcW,srcH,GL_UNSIGNED_BYTE,(void*)pSrcImg,destW,destH,GL_UNSIGNED_BYTE,(void*)texData);
if (r!=0)
printf("Error trying to scale image\n");
glGenTextures(1, &texId);
glBindTexture(GL_TEXTURE_2D, texId);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, destW, destH, 0, format, GL_UNSIGNED_BYTE, (GLvoid *)(texData));
delete [] texData;
}
else
{
glGenTextures(1, &texId);
glBindTexture(GL_TEXTURE_2D, texId);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, format, destW, destH, 0, format, GL_UNSIGNED_BYTE, (GLvoid *)(pSrcImg));
}
}
/** Load an image from disk to a buffer in RGBA mode.
@ingroup img
@param filename name of the image to load

1
src/libs/tgfclient/tgfclient.h
View file

@ -49,6 +49,7 @@ extern int GfImgWritePng(unsigned char *img, const char *filename, int width, in
extern void GfImgFreeTex(GLuint tex);
extern GLuint GfImgReadTex(const char *filename);
extern GLuint GfImgReadTex(const char *filename,int &height,int &width);
extern void GfScaleImagePowerof2(unsigned char *pSrcImg,int srcW,int srcH,GLenum format,GLuint &texId);
extern void GfScrInit(int argc, char *argv[]);
extern void GfScrShutdown(void);