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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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43
source/shared_lib/sources/graphics/pixmap.cpp
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@@ -23,6 +23,7 @@
#include "ImageReaders.h"
#include <png.h>
#include <setjmp.h>
#include <memory>
#include "leak_dumper.h"
@@ -417,6 +418,28 @@ void PixmapIoPng::openWrite(const string &path, int w, int h, int components) {
}
void PixmapIoPng::write(uint8 *pixels) {
// initialize stuff
std::auto_ptr<png_byte*> imrow(new png_byte*[h]);
for(int i = 0; i < h; ++i) {
imrow.get()[i] = pixels+(h-1-i) * w * components;
}
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, file);
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);
/*
// Allocate write & info structures
png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if(!png_ptr) {
@@ -435,7 +458,7 @@ void PixmapIoPng::write(uint8 *pixels) {
// setjmp() must be called in every function that calls a PNG-writing
// libpng function, unless an alternate error handler was installed--
// but compatible error handlers must either use longjmp() themselves
// (as in this program) or exit immediately, so here we go: */
// (as in this program) or exit immediately, so here we go:
if(setjmp(png_jmpbuf(png_ptr))) {
png_destroy_write_struct(&png_ptr, &info_ptr);
@@ -470,15 +493,16 @@ void PixmapIoPng::write(uint8 *pixels) {
// color_type = PNG_COLOR_TYPE_GRAY;
// color_type = PNG_COLOR_TYPE_GRAY_ALPHA;
color_type = PNG_COLOR_TYPE_RGB;
numChannels = 3;
color_type = PNG_COLOR_TYPE_RGBA;
numChannels = 4;
// color_type = PNG_COLOR_TYPE_RGB_ALPHA;
interlace_type = PNG_INTERLACE_NONE;
// interlace_type = PNG_INTERLACE_ADAM7;
int bit_depth = 8;
png_set_IHDR(png_ptr, info_ptr, this->w, this->h, bit_depth,
png_set_IHDR(png_ptr, info_ptr, this->w, this->h,
bit_depth,
color_type,
interlace_type,
PNG_COMPRESSION_TYPE_BASE,
@@ -488,12 +512,15 @@ void PixmapIoPng::write(uint8 *pixels) {
// as to the correct gamma of the image. (we don't have a guess)
//
// png_set_gAMA(png_ptr, info_ptr, image_gamma);
//png_set_strip_alpha(png_ptr);
// write all chunks up to (but not including) first IDAT
png_write_info(png_ptr, info_ptr);
// set up the row pointers for the image so we can use png_write_image
//png_write_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL );
// set up the row pointers for the image so we can use png_write_image
png_bytep* row_pointers = new png_bytep[this->h];
if (row_pointers == 0) {
png_destroy_write_struct(&png_ptr, &info_ptr);
@@ -513,7 +540,7 @@ void PixmapIoPng::write(uint8 *pixels) {
// since that's it, we also close out the end of the PNG file now--if we
// had any text or time info to write after the IDATs, second argument
// would be info_ptr, but we optimize slightly by sending NULL pointer: */
// would be info_ptr, but we optimize slightly by sending NULL pointer:
png_write_end(png_ptr, info_ptr);
@@ -524,7 +551,7 @@ void PixmapIoPng::write(uint8 *pixels) {
png_destroy_write_struct(&png_ptr, &info_ptr);
delete [] row_pointers;
//fclose(file);
*/
}
// =====================================================
@@ -1068,7 +1095,7 @@ void Pixmap3D::loadSliceBmp(const string &path, int slice){
}
void Pixmap3D::loadSliceTga(const string &path, int slice){
this->path = path;
this->path = path;
PixmapIoTga plt;
plt.openRead(path);