SDL+OpenGL Texture not Rendering-- HELP!
Posted: Fri May 04, 2012 2:15 pm
Hey guys, I've been trying to get this damn texture to render, but OpenGL won't render the texture.
Here is the code for lsRender.cpp which has all the functions for rendering:}
void ls::Render::clear() {
SDL_FillRect(screen,NULL,SDL_MapRGB(screen->format,0,0,0));
glClear(GL_COLOR_BUFFER_BIT);
}
void ls::Render::sync() {
SDL_Flip(ls::screen);
SDL_GL_SwapBuffers();
}
[/code]
Here is the code for lsSprite.cpp which wraps over the lsRender functions in a 'Sprite'-way:
Here is Game.cpp which basically invokes the main engine and makes use of the lsSprite class(which makes use of the lsRender class), to draw Crono onto the screen(or should do):
Can anyone please tell me why it only renders a white quadrilateral instead of Crono?
NOTE: As you can see in the console there are no load errors for finding the image. The problem lies either in formatting the image correctly(the texture crap after loading the image), somewhere in my GLuint* crap(doubt it), or the actually rendering of the image its self.
BTW here's the main function's contents:
Thanks in advance. 
Here is the code for lsRender.cpp which has all the functions for rendering:
Code: Select all
#include "lsGlobals.h"
#include "lsRender.h"
ls::Gfx ls::Render::load(std::string address, GLuint *texture, GLenum *textureFormat, GLint *nOfColors){
address = "media/" + address + ".bmp";
Gfx gfx = IMG_Load(address.c_str()); //IMG_Load used instead of SDL_LoadBMP because it can load converted images
if(gfx == NULL){
ls::Utils::errorReport("Failed to load image: " + address);
return gfx;
}
/*gfx = SDL_DisplayFormat(gfx);
ls::Render::censor(gfx, ls::Utils::genColorKey(gfx, 255, 0, 255));*/
*nOfColors = gfx->format->BytesPerPixel;
if (*nOfColors == 4)
{
if (gfx->format->Rmask == 0x000000ff)
*textureFormat = GL_RGBA;
else
*textureFormat = GL_BGRA;
} else if (*nOfColors == 3)
{
if (gfx->format->Rmask == 0x000000ff)
*textureFormat = GL_RGB;
else
*textureFormat = GL_BGR;
} else {
printf("warning: the image is not truecolor.. this will probably break\n");
// this error should not go unhandled
}
glGenTextures( 1, texture );
glBindTexture( GL_TEXTURE_2D, *texture );
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, *nOfColors, gfx->w, gfx->h, 0,
*textureFormat, GL_UNSIGNED_BYTE, gfx->pixels );
return gfx;
}
void ls::Render::render(Gfx gfx, ls::Frame frame, ls::Frame clip, GLuint texture, GLenum textureFormat, GLint nOfColors) {
/*ls::Vec2d a = ls::Utils::genVec2d((clip.x - 1) * (1 / (256 / clip.w)), (clip.y- 1) * (1 / (256 / clip.h)));
ls::Vec2d b = ls::Utils::genVec2d(clip.x * (1 / (256 / clip.w)), (clip.y - 1) * (1 / (256 / clip.h)));
ls::Vec2d c = ls::Utils::genVec2d(clip.x * (1 / (256 / clip.w)), clip.y * (1 / (256 / clip.h)));
ls::Vec2d d = ls::Utils::genVec2d((clip.x - 1) * (1 / (256 / clip.w)), clip.y * (1 / (256 / clip.h)));*/
//SDL_BlitSurface(gfx, &clip,ls::screen, &frame);
glBindTexture(GL_TEXTURE_2D, texture);
glTranslatef(frame.x, frame.y, 0);
glBegin(GL_QUADS);
glTexCoord2f((GLfloat) clip.x*clip.w, (GLfloat) clip.y*clip.h);
glVertex2f(0, 0);
glTexCoord2f((GLfloat) (clip.x+1)*clip.w, (GLfloat) clip.y*clip.h);
glVertex2f(clip.w, 0);
glTexCoord2f((GLfloat) (clip.x+1)*clip.w, (GLfloat) (clip.y+1)*clip.h);
glVertex2f(clip.w, clip.h);
glTexCoord2f((GLfloat) clip.x*clip.w, (GLfloat) (clip.y+1)*clip.h);
glVertex2f(0, clip.h);
glEnd();
glLoadIdentity();
}
void ls::Render::censor(ls::Gfx gfx, Uint32 colorKey) {
SDL_SetColorKey(gfx, SDL_SRCCOLORKEY, colorKey);
}
void ls::Render::free(Gfx gfx){
SDL_FreeSurface(gfx);
[code]void ls::Render::clear() {
SDL_FillRect(screen,NULL,SDL_MapRGB(screen->format,0,0,0));
glClear(GL_COLOR_BUFFER_BIT);
}
void ls::Render::sync() {
SDL_Flip(ls::screen);
SDL_GL_SwapBuffers();
}
[/code]
Here is the code for lsSprite.cpp which wraps over the lsRender functions in a 'Sprite'-way:
Code: Select all
#include "lsSprite.h"
#include <iostream>
ls::Sprite::Sprite(){
}
ls::Sprite::Sprite(std::string address, ls::Frame bodyFrame, ls::Frame clipFrame){
ls::Sprite::load(address);
body = bodyFrame;
clip = clipFrame;
show=false;
}
ls::Sprite::~Sprite(){
ls::Render::free(gfx);
}
void ls::Sprite::load(std::string address){
gfx = ls::Render::load(SPRITES_FOLDER + address, &texture, &textureFormat, &nOfColors);
}
void ls::Sprite::render() {
ls::Render::render(gfx, body, clip, texture, textureFormat, nOfColors);
}
Code: Select all
#include "LunarSanity.h"
ls::Sprite *crono;
void ls::start() {
}
void ls::load() {
crono = new ls::Sprite("crono", ls::Utils::genFrame(32, 0, 32, 64), ls::Utils::genFrame(1, 1, 32, 64));
}
void ls::gameplay() {
glColor3f(255, 255, 255);
crono->render();
glTranslatef(200.0f, 100.0f, 0.0f);
glRotatef(135.0f, 0.0f, 0.0f, 1.0f);
glScalef(2.0f, 2.0f, 0.0f);
glBegin(GL_QUADS);
glColor3f(1.0f, 0.0f, 0.0f);
glVertex3f(0.0f, 0.0f, 0.0f);
glColor3f(0.0f, 1.0f, 0.0f);
glVertex3f(32.0f, 0.0f, 0.0f);
glColor3f(0.0f, 1.0f, 0.0f);
glVertex3f(32.0f, 64.0f, 0.0f);
glColor3f(1.0f, 0.0f, 1.0f);
glVertex3f(0.0f, 64.0f, 0.0f);
glEnd();
glLoadIdentity();
}
void ls::keyboard(short type) {
}
void ls::end() {
}
Can anyone please tell me why it only renders a white quadrilateral instead of Crono?
NOTE: As you can see in the console there are no load errors for finding the image. The problem lies either in formatting the image correctly(the texture crap after loading the image), somewhere in my GLuint* crap(doubt it), or the actually rendering of the image its self.
BTW here's the main function's contents:
Code: Select all
SDL_Init(SDL_INIT_EVERYTHING);
TTF_Init();
SDL_WM_SetCaption("Lunar Sanity", NULL);
SDL_ShowCursor(SDL_DISABLE);
ls::start();
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
#ifdef _DEBUG_
ls::screen = SDL_SetVideoMode(ls::screenWidth, ls::screenHeight, ls::screenBpp, SDL_OPENGL|SDL_HWSURFACE|SDL_DOUBLEBUF);
#else
ls::screen=SDL_SetVideoMode(ls::screenWidth, ls::screenHeight, ls::screenBpp, SDL_OPENGL|SDL_FULLSCREEN|SDL_HWSURFACE|SDL_DOUBLEBUF);
#endif
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glClearColor(0, 0, 0, 0);
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glOrtho(0, ls::screenWidth, ls::screenHeight, 0, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
ls::load();
#ifndef _DS_
splash = new ls::Sprite(ls::UI_FOLDER + "logo", 0, 32, 512, 512);
splash->render();
ls::sync();
ls::sleep(2000);
#endif
while(!ls::isEnd){
ls::Utils::sleep(100);
ls::Render::sync();
ls::Render::clear();
ls::gameplay();
ls::Render::sync();
if(CONTROL_HIT(&ls::event)){
ls::keyboard(ls::event.type);
}
}
std::cout.flush();
TTF_Quit();
SDL_Quit();
ls::Utils::close();