Rewrite Fl_Gl_Device_Plugin.cxx in a platform-independent way.
The platform-specific code lands in src/Drivers/OpenGL/Fl_OpenGL_Display_Device.cxx and the FL_PORTING clause should be compilable. git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11327 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Manolo Gouy
parent
309213bfae
commit
fc3adbd7cb
@ -16,98 +16,12 @@
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// http://www.fltk.org/str.php
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//
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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_Shared_Image.H>
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#include "FL/Fl.H"
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#include "drivers/OpenGL/Fl_OpenGL_Display_Device.H"
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#if defined(WIN32) || defined(__APPLE__) // PORTME: Fl_Surface_Driver - platform OpenGL management
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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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#if defined(__APPLE__) // PORTME: Fl_Surface_Driver - platform OpenGL management
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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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*/
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{
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#if defined(__APPLE__) // PORTME: Fl_Surface_Driver - platform OpenGL management
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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__) // PORTME: Fl_Surface_Driver - platform OpenGL management
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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__) // PORTME: Fl_Surface_Driver - platform OpenGL management
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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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// GL gives a bottom-to-top image, convert it to top-to-bottom
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uchar *tmp = new uchar[mByteWidth];
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uchar *p = baseAddress ;
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uchar *q = baseAddress + (h-1)*mByteWidth;
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for (int i = 0; i < h/2; i++, p += mByteWidth, q -= mByteWidth) {
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memcpy(tmp, p, mByteWidth);
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memcpy(p, q, mByteWidth);
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memcpy(q, tmp, mByteWidth);
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}
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delete[] tmp;
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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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/**
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This class will make sure that OpenGL printing/screen capture is available if fltk_gl
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@ -120,7 +34,7 @@ public:
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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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Fl_RGB_Image *img = Fl_OpenGL_Display_Device::capture_gl_rectangle(glw, 0, 0, glw->w(), glw->h());
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Fl_Shared_Image *shared = Fl_Shared_Image::get(img);
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shared->scale(glw->w(), glw->h());
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shared->draw(x, y);
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@ -130,7 +44,7 @@ public:
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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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return Fl_OpenGL_Display_Device::capture_gl_rectangle(glw, x, y, w, h);
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}
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};
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@ -20,6 +20,8 @@
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#include <FL/Fl_Device.H>
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class Fl_OpenGL_Graphics_Driver;
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class Fl_Gl_Window;
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class Fl_RGB_Image;
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/**
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OpenGL Surface.
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@ -29,6 +31,7 @@ class FL_EXPORT Fl_OpenGL_Display_Device : public Fl_Surface_Device {
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public:
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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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static Fl_RGB_Image* capture_gl_rectangle(Fl_Gl_Window*, int, int, int, int);
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};
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@ -19,8 +19,10 @@
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#include <config.h>
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#include "../../config_lib.h"
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#include <FL/Fl_Gl_Window.H>
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#include <FL/Fl_Image.H>
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#include <FL/Fl_Device.H>
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#include <FL/gl.h>
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#include <string.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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@ -37,6 +39,120 @@ Fl_OpenGL_Display_Device::Fl_OpenGL_Display_Device(Fl_OpenGL_Graphics_Driver *gr
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{
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}
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#ifdef FL_CFG_GFX_QUARTZ
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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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Fl_RGB_Image* Fl_OpenGL_Display_Device::capture_gl_rectangle(Fl_Gl_Window* glw, int x, int y, int w, int h)
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{
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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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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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GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
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baseAddress);
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glPopClientAttrib();
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baseAddress = convert_BGRA_to_RGB(baseAddress, w, h, mByteWidth);
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mByteWidth = 3 * w;
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// GL gives a bottom-to-top image, convert it to top-to-bottom
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uchar *tmp = new uchar[mByteWidth];
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uchar *p = baseAddress ;
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uchar *q = baseAddress + (h-1)*mByteWidth;
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for (int i = 0; i < h/2; i++, p += mByteWidth, q -= mByteWidth) {
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memcpy(tmp, p, mByteWidth);
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memcpy(p, q, mByteWidth);
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memcpy(q, tmp, mByteWidth);
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}
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delete[] tmp;
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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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#elif defined(FL_CFG_GFX_GDI) || defined(FL_CFG_GFX_XLIB)
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Fl_RGB_Image* Fl_OpenGL_Display_Device::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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*/
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{
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const int bytesperpixel = 3;
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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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GL_RGB, GL_UNSIGNED_BYTE,
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baseAddress);
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glPopClientAttrib();
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// GL gives a bottom-to-top image, convert it to top-to-bottom
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uchar *tmp = new uchar[mByteWidth];
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uchar *p = baseAddress ;
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uchar *q = baseAddress + (h-1)*mByteWidth;
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for (int i = 0; i < h/2; i++, p += mByteWidth, q -= mByteWidth) {
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memcpy(tmp, p, mByteWidth);
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memcpy(p, q, mByteWidth);
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memcpy(q, tmp, mByteWidth);
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}
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delete[] tmp;
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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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#elif defined(FL_PORTING)
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# pragma message "FL_PORTING: implement Fl_OpenGL_Display_Device::capture_gl_rectangle() for your platform"
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Fl_RGB_Image* Fl_OpenGL_Display_Device::capture_gl_rectangle(Fl_Gl_Window* glw, int x, int y, int w, int h)
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{
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return NULL;
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}
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#endif
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//
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// End of "$Id$".
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//
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