mirror of https://github.com/fltk/fltk
Updated OpenGL Display Device
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11084 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Matthias Melcher
parent
222243bc86
commit
f5a6b10f46
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@ -25,29 +25,6 @@
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#include "Fl_Window.H"
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// ------ this should be in a separate file! -----------------------------------
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#ifdef FL_CFG_GFX_OPENGL
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#include <FL/Fl_Device.H>
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class Fl_OpenGL_Graphics_Driver;
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/**
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OpenGL Surface.
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This surface is needed as an interface between GL windows and the GL graphics driver.
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*/
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class FL_EXPORT Fl_OpenGL_Display_Device : public Fl_Surface_Device {
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public:
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static const char *class_id;
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const char *class_name() {return class_id;};
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Fl_OpenGL_Display_Device(Fl_OpenGL_Graphics_Driver *graphics_driver);
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static Fl_OpenGL_Display_Device *display_device();
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};
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#endif
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// ------ end of separate file! ------------------------------------------------
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#ifndef GLContext
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/**
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Opaque pointer type to hide system specific implementation.
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@ -34,6 +34,8 @@ extern int fl_gl_load_plugin;
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#include <stdlib.h>
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#include <FL/fl_utf8.h>
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#include "drivers/OpenGL/Fl_OpenGL_Display_Device.h"
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#if defined(WIN32) || defined(__APPLE__)
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#elif defined(FL_PORTING)
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# pragma message "FL_PORTING: implement the creation and destruction of OpenGL surfaces"
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@ -23,6 +23,8 @@
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#include <FL/gl.h>
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#include "Fl_OpenGL_Graphics_Driver.h"
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#include "Fl_OpenGL_Display_Device.h"
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Fl_OpenGL_Display_Device *Fl_OpenGL_Display_Device::display_device() {
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static Fl_OpenGL_Display_Device *display = new Fl_OpenGL_Display_Device(new Fl_OpenGL_Graphics_Driver());
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@ -17,179 +17,22 @@
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//
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// FIXME: fill with code!
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#if 0
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#include <config.h>
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#include "config_lib.h"
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#include <FL/Fl_Printer.H>
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#include <FL/Fl_Gl_Window.H>
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#include "Fl_Gl_Choice.H"
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#include <FL/Fl_RGB_Image.H>
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#include "FL/Fl.H"
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#if defined(WIN32) || defined(__APPLE__)
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#elif defined(FL_PORTING)
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# pragma message "FL_PORTING: implement code to read OpenGL renderings into RGB maps"
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#else
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#endif
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// ------ this should be in a separate file! -----------------------------------
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#ifdef FL_CFG_GFX_OPENGL
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#include <FL/Fl_Device.H>
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#include <FL/gl.h>
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#include "drivers/OpenGL/Fl_OpenGL_Graphics_Driver.h"
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Fl_OpenGL_Display_Device *Fl_OpenGL_Display_Device::display_device() {
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static Fl_OpenGL_Display_Device *display = new Fl_OpenGL_Display_Device(new Fl_OpenGL_Graphics_Driver());
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return display;
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};
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Fl_OpenGL_Display_Device::Fl_OpenGL_Display_Device(Fl_OpenGL_Graphics_Driver *graphics_driver)
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: Fl_Surface_Device(graphics_driver)
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{
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}
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const char *Fl_OpenGL_Display_Device::class_id = "Fl_OpenGL_Display_Device";
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#endif
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// ------ end of separate file! ------------------------------------------------
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#include "drivers/OpenGL/Fl_OpenGL_Graphics_Driver_arci.cxx"
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#include "drivers/OpenGL/Fl_OpenGL_Graphics_Driver_color.cxx"
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#include "drivers/OpenGL/Fl_OpenGL_Graphics_Driver_font.cxx"
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#include "drivers/OpenGL/Fl_OpenGL_Graphics_Driver_image.cxx"
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#include "drivers/OpenGL/Fl_OpenGL_Graphics_Driver_line_style.cxx"
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#include "drivers/OpenGL/Fl_OpenGL_Graphics_Driver_rect.cxx"
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#include "drivers/OpenGL/Fl_OpenGL_Graphics_Driver_vertex.cxx"
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#if defined(__APPLE__)
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uchar *convert_BGRA_to_RGB(uchar *baseAddress, int w, int h, int mByteWidth)
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{
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uchar *newimg = new uchar[3*w*h];
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uchar *to = newimg;
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for (int i = 0; i < h; i++) {
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uchar *from = baseAddress + i * mByteWidth;
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for (int j = 0; j < w; j++, from += 4) {
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#if __ppc__
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memcpy(to, from + 1, 3);
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to += 3;
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#else
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*(to++) = *(from+2);
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*(to++) = *(from+1);
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*(to++) = *from;
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#endif
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}
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}
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delete[] baseAddress;
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return newimg;
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}
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#endif
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static Fl_RGB_Image* capture_gl_rectangle(Fl_Gl_Window *glw, int x, int y, int w, int h)
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/* captures a rectangle of a Fl_Gl_Window window, and returns it as a RGB image
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stored from bottom to top.
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*/
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{
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#if defined(__APPLE__)
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const int bytesperpixel = 4;
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int factor = glw->pixels_per_unit();
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if (factor > 1) {
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w *= factor; h *= factor; x *= factor; y *= factor;
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}
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#else
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const int bytesperpixel = 3;
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#endif
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glw->flush(); // forces a GL redraw, necessary for the glpuzzle demo
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// Read OpenGL context pixels directly.
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// For extra safety, save & restore OpenGL states that are changed
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glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
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glPixelStorei(GL_PACK_ALIGNMENT, 4); /* Force 4-byte alignment */
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glPixelStorei(GL_PACK_ROW_LENGTH, 0);
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glPixelStorei(GL_PACK_SKIP_ROWS, 0);
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glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
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// Read a block of pixels from the frame buffer
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int mByteWidth = w * bytesperpixel;
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mByteWidth = (mByteWidth + 3) & ~3; // Align to 4 bytes
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uchar *baseAddress = new uchar[mByteWidth * h];
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glReadPixels(x, glw->pixel_h() - (y+h), w, h,
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#if defined(__APPLE__)
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GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
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#else
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GL_RGB, GL_UNSIGNED_BYTE,
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#endif
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baseAddress);
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glPopClientAttrib();
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#if defined(__APPLE__)
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baseAddress = convert_BGRA_to_RGB(baseAddress, w, h, mByteWidth);
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mByteWidth = 3 * w;
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#endif
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Fl_RGB_Image *img = new Fl_RGB_Image(baseAddress, w, h, 3, mByteWidth);
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img->alloc_array = 1;
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return img;
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}
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#ifdef __APPLE__
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static void imgProviderReleaseData (void *info, const void *data, size_t size)
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{
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delete (Fl_RGB_Image *)info;
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}
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#endif
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class Fl_OpenGL_Graphics_Driver;
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/**
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This class will make sure that OpenGL printing/screen capture is available if fltk_gl
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was linked to the program
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OpenGL Surface.
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This surface is needed as an interface between GL windows and the GL graphics driver.
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*/
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class Fl_Gl_Device_Plugin : public Fl_Device_Plugin {
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class FL_EXPORT Fl_OpenGL_Display_Device : public Fl_Surface_Device {
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public:
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Fl_Gl_Device_Plugin() : Fl_Device_Plugin(name()) { }
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virtual const char *name() { return "opengl.device.fltk.org"; }
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virtual int print(Fl_Widget *w, int x, int y, int height /*useless*/) {
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Fl_Gl_Window *glw = w->as_gl_window();
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if (!glw) return 0;
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Fl_RGB_Image *img = capture_gl_rectangle(glw, 0, 0, glw->w(), glw->h());
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#ifdef __APPLE__
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if (Fl_Surface_Device::surface()->driver()->has_feature(Fl_Graphics_Driver::NATIVE)) {
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// convert the image to CGImage, and draw it at full res (useful on retina display)
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CGColorSpaceRef cSpace = CGColorSpaceCreateDeviceRGB();
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CGDataProviderRef provider = CGDataProviderCreateWithData(img, img->array, img->ld() * img->h(), imgProviderReleaseData);
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CGImageRef cgimg = CGImageCreate(img->w(), img->h(), 8, 24, img->ld(), cSpace,
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(CGBitmapInfo)(kCGImageAlphaNone),
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provider, NULL, false, kCGRenderingIntentDefault);
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CGColorSpaceRelease(cSpace);
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CGDataProviderRelease(provider);
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CGContextDrawImage(fl_gc, CGRectMake(0, 0, glw->w(), glw->h()), cgimg);
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CFRelease(cgimg);
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return 1;
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} else if (img->w() > glw->w()) {
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Fl_RGB_Image *img2 = (Fl_RGB_Image*)img->copy(glw->w(), glw->h());
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delete img;
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img = img2;
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}
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#endif
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int ld = img->ld() ? img->ld() : img->w() * img->d();
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fl_draw_image(img->array + (img->h() - 1) * ld, x, y , img->w(), img->h(), 3, - ld);
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delete img;
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return 1;
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}
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virtual Fl_RGB_Image* rectangle_capture(Fl_Widget *widget, int x, int y, int w, int h) {
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Fl_Gl_Window *glw = widget->as_gl_window();
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if (!glw) return NULL;
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return capture_gl_rectangle(glw, x, y, w, h);
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}
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static const char *class_id;
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const char *class_name() {return class_id;};
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Fl_OpenGL_Display_Device(Fl_OpenGL_Graphics_Driver *graphics_driver);
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static Fl_OpenGL_Display_Device *display_device();
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};
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static Fl_Gl_Device_Plugin Gl_Device_Plugin;
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// The purpose of this variable, used in Fl_Gl_Window.cxx, is only to force this file to be loaded
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// whenever Fl_Gl_Window.cxx is loaded, that is, whenever fltk_gl is.
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FL_EXPORT int fl_gl_load_plugin = 0;
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#endif
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//
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// End of "$Id$".
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