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#include <string.h>
#ifdef WIN32
#include <windows.h>
#endif
#include <GL/gl.h>
#include "main/imagehandler.h"
#include "../exception.h"
#include "../demolib_prefs.h"
#include "opengl/texture.h"
#if DEMOLIB_MAINLOOP
ImageHandler::ImageHandler(MainLoop *ml, const char *title, const char *elem, Hashtable *attr) :
Event(ml, title, elem, attr, "xcsize:ycsize:xpos:ypos:xsize:ysize:alpha")
{
this->tex = texture::load(attr->get_str("file"));
}
ImageHandler::~ImageHandler()
{
texture::free(this->tex);
this->tex = NULL;
}
void ImageHandler::start_effect()
{
}
void ImageHandler::draw_scene(float progress)
{
float alpha = this->get_val("alpha", progress);
if (alpha <= 0.0f) return;
float xcsize = this->get_val("xcsize", progress);
float ycsize = this->get_val("ycsize", progress);
float xpos = this->get_val("xpos", progress) - xcsize * 0.5f;
float ypos = this->get_val("ypos", progress) - ycsize * 0.5f;
float xsize = this->get_val("xsize", progress) + xcsize;
float ysize = this->get_val("ysize", progress) + ycsize;
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glScalef(DEMOLIB_YASPECT / DEMOLIB_XASPECT, 1.0f, 1.0f);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
glDisable(GL_STENCIL_TEST);
this->tex->bind();
glEnable(GL_TEXTURE_2D);
glColor4f(1.0f, 1.0f, 1.0f, alpha);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
float w_nudge = 0.5f / (float)tex->get_width();
float h_nudge = 0.5f / (float)tex->get_height();
glBegin(GL_QUADS);
glTexCoord2f(w_nudge, h_nudge);
glVertex3f(xpos, ypos, 0.0f);
glTexCoord2f(w_nudge, 1.0f - h_nudge);
glVertex3f(xpos, ypos + ysize, 0.0f);
glTexCoord2f(1.0f - w_nudge, 1.0f - h_nudge);
glVertex3f(xpos + xsize, ypos + ysize, 0.0f);
glTexCoord2f(1.0f - w_nudge, h_nudge);
glVertex3f(xpos + xsize, ypos, 0.0f);
glEnd();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
void ImageHandler::end_effect() {}
#endif
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