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- added ability to save screenshots in G3d with background transparency

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This commit is contained in:
Mark Vejvoda
2011-01-21 16:34:33 +00:00
parent 0a7b3f9ebd
commit 9d369bb30e
5 changed files with 169 additions and 57 deletions
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102
source/g3d_viewer/renderer.cpp
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@@ -2,6 +2,8 @@
#include "graphics_factory_gl.h"
#include "graphics_interface.h"
#include <png.h>
#include <memory>
using namespace Shared::Graphics;
using namespace Shared::Graphics::Gl;
@@ -151,17 +153,6 @@ Model * Renderer::getNewModel() {
return newModel;
}
void Renderer::setBackgroundColor(float red, float green, float blue, float alpha) {
this->red = red;
this->green = green;
this->blue = blue;
this->alpha= alpha;
glClearColor(red, green, blue, alpha); //backgroundcolor constant 0.3
//glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
//glFlush();
//SwapBuffers();
}
void Renderer::init() {
assertGl();
@@ -219,6 +210,13 @@ void Renderer::init() {
customTextureMagenta->getPixmap()->setPixel(0, 0, Vec3f(1.f, 0.5f, 1.f));
glClearColor(red, green, blue, alpha); //backgroundcolor constant 0.3
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* once the GL context is valid : */
GLint alpha_bits;
glGetIntegerv(GL_ALPHA_BITS, &alpha_bits);
//printf("#1 The framebuffer uses %d bit(s) per the alpha component\n", alpha_bits);
glEnable(GL_TEXTURE_2D);
glFrontFace(GL_CW);
glEnable(GL_CULL_FACE);
@@ -248,7 +246,14 @@ void Renderer::reset(int w, int h, PlayerColor playerColor) {
width=w;
height=h;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glClearColor(red, green, blue, alpha); //backgroundcolor constant 0.3
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* once the GL context is valid : */
GLint alpha_bits;
glGetIntegerv(GL_ALPHA_BITS, &alpha_bits);
//printf("#2 The framebuffer uses %d bit(s) per the alpha component\n", alpha_bits);
glViewport(0, 0, w, h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
@@ -434,14 +439,79 @@ void Renderer::end() {
modelManager->end();
}
void Renderer::setBackgroundColor(float red, float green, float blue) {
this->red = red;
this->green = green;
this->blue = blue;
glClearColor(red, green, blue, alpha); //backgroundcolor constant 0.3
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* once the GL context is valid : */
GLint alpha_bits;
glGetIntegerv(GL_ALPHA_BITS, &alpha_bits);
//printf("#3 The framebuffer uses %d bit(s) per the alpha component\n", alpha_bits);
}
void Renderer::setAlphaColor(float alpha) {
this->alpha= alpha;
glClearColor(red, green, blue, alpha); //backgroundcolor constant 0.3
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* once the GL context is valid : */
GLint alpha_bits;
glGetIntegerv(GL_ALPHA_BITS, &alpha_bits);
//printf("#3.1 The framebuffer uses %d bit(s) per the alpha component\n", alpha_bits);
}
void Renderer::saveScreen(const string &path) {
//const Metrics &sm= Metrics::getInstance();
/*
int x = 0;
int y = 0;
int w = width;
int h = height;
// get data
std::auto_ptr<png_byte> imdata(new png_byte[w*h*4]);
std::auto_ptr<png_byte*> imrow(new png_byte*[h]);
for(int i=0; i<h; ++i)
imrow.get()[i] = imdata.get()+(h-1-i)*w*4;
glPixelStorei(GL_PACK_ALIGNMENT,1);
glReadPixels(x,y,w,h,GL_RGBA,GL_UNSIGNED_BYTE,imdata.get());
// once the GL context is valid
//GLint alpha_bits;
//glGetIntegerv(GL_ALPHA_BITS, &alpha_bits);
//printf("#4 The framebuffer uses %d bit(s) per the alpha component\n", alpha_bits);
// create file
FILE *fp = fopen(path.c_str(), "wb");
if (!fp) {
perror(path.c_str());
return;
}
// initialize stuff
png_structp imgp = png_create_write_struct(PNG_LIBPNG_VER_STRING,0,0,0);
png_infop infop = png_create_info_struct(imgp);
png_init_io(imgp, fp);
png_set_IHDR(imgp, infop, w, h,
8, PNG_COLOR_TYPE_RGBA, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
// write file
png_write_info(imgp, infop);
png_write_image(imgp, imrow.get());
png_write_end(imgp, NULL);
fclose(fp);
*/
//Pixmap2D pixmap(sm.getScreenW(), sm.getScreenH(), 3);
Pixmap2D *pixmapScreenShot = new Pixmap2D(width, height, 3);
Pixmap2D *pixmapScreenShot = new Pixmap2D(width, height, 4);
glFinish();
glReadPixels(0, 0, pixmapScreenShot->getW(), pixmapScreenShot->getH(),
GL_RGB, GL_UNSIGNED_BYTE, pixmapScreenShot->getPixels());
glReadPixels(0, 0, pixmapScreenShot->getW(), pixmapScreenShot->getH(),GL_RGBA, GL_UNSIGNED_BYTE, pixmapScreenShot->getPixels());
pixmapScreenShot->save(path);
delete pixmapScreenShot;