diff options
| -rw-r--r-- | copy_pixels_swap_hack.c | 74 |
1 files changed, 44 insertions, 30 deletions
diff --git a/copy_pixels_swap_hack.c b/copy_pixels_swap_hack.c index 653eeaf..2aff551 100644 --- a/copy_pixels_swap_hack.c +++ b/copy_pixels_swap_hack.c @@ -15,53 +15,67 @@ #include <dlfcn.h> #include <GL/gl.h> #include <GL/glx.h> +#include <X11/Xlib.h> void glCopyPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum type) { static int first = 1; - static Display* (*glx_get_current_display)(void) = NULL; - static GLXDrawable (*glx_get_current_drawable)(void) = NULL; - static void (*glx_swap_buffers)(Display*,GLXDrawable) = NULL; - static void (*gl_copy_pixels)(GLint,GLint,GLsizei,GLsizei,GLenum) = NULL; - static void (*gl_get_integerv)(GLenum,GLint*) = NULL; - static void (*gl_draw_buffer)(GLenum) = NULL; - static void (*gl_read_buffer)(GLenum) = NULL; + static Display* (*glX_GetCurrentDisplay)(void) = NULL; + static GLXDrawable (*glX_GetCurrentDrawable)(void) = NULL; + static Status (*X_GetGeometry)(Display*,Drawable,Window*,int*,int*,unsigned*,unsigned*,unsigned*,unsigned*); + static void (*glX_SwapBuffers)(Display*,GLXDrawable) = NULL; + static void (*gl_WindowPos3i)(GLint,GLint,GLint) = NULL; + static void (*gl_CopyPixels)(GLint,GLint,GLsizei,GLsizei,GLenum) = NULL; + static void (*gl_GetIntegerv)(GLenum,GLint*) = NULL; + static void (*gl_DrawBuffer)(GLenum) = NULL; + static void (*gl_ReadBuffer)(GLenum) = NULL; if( first ){ - *(void**)(&glx_get_current_display) = dlsym(RTLD_NEXT, "glXGetCurrentDisplay"); - *(void**)(&glx_get_current_drawable) = dlsym(RTLD_NEXT, "glXGetCurrentDrawable"); - *(void**)(&glx_swap_buffers) = dlsym(RTLD_NEXT, "glXSwapBuffers"); - *(void**)(&gl_copy_pixels) = dlsym(RTLD_NEXT, "glCopyPixels"); - *(void**)(&gl_get_integerv) = dlsym(RTLD_NEXT, "glGetIntegerv"); - *(void**)(&gl_draw_buffer) = dlsym(RTLD_NEXT, "glDrawBuffer"); - *(void**)(&gl_read_buffer) = dlsym(RTLD_NEXT, "glReadBuffer"); + *(void**)(&glX_GetCurrentDisplay) = dlsym(RTLD_NEXT, "glXGetCurrentDisplay"); + *(void**)(&glX_GetCurrentDrawable) = dlsym(RTLD_NEXT, "glXGetCurrentDrawable"); + *(void**)(&glX_SwapBuffers) = dlsym(RTLD_NEXT, "glXSwapBuffers"); + *(void**)(&X_GetGeometry) = dlsym(RTLD_NEXT, "XGetGeometry"); + *(void**)(&gl_WindowPos3i) = dlsym(RTLD_NEXT, "glWindowPos3i"); + *(void**)(&gl_CopyPixels) = dlsym(RTLD_NEXT, "glCopyPixels"); + *(void**)(&gl_GetIntegerv) = dlsym(RTLD_NEXT, "glGetIntegerv"); + *(void**)(&gl_DrawBuffer) = dlsym(RTLD_NEXT, "glDrawBuffer"); + *(void**)(&gl_ReadBuffer) = dlsym(RTLD_NEXT, "glReadBuffer"); first = 0; } Display *dpy; GLXDrawable drw; - if( !glx_get_current_display || !glx_get_current_drawable - || !gl_get_integerv || !gl_copy_pixels || !glx_swap_buffers - || !gl_draw_buffer || !gl_read_buffer - || !(dpy = glx_get_current_display()) - || !(drw = glx_get_current_drawable()) + if( !glX_GetCurrentDisplay || !glX_GetCurrentDrawable || !glX_SwapBuffers + || !gl_GetIntegerv || !gl_WindowPos3i || !gl_CopyPixels + || !gl_DrawBuffer || !gl_ReadBuffer + || !(dpy = glX_GetCurrentDisplay()) + || !(drw = glX_GetCurrentDrawable()) ){ return; } GLint buffer_draw = 0; GLint buffer_read = ~0; - gl_get_integerv(GL_DRAW_BUFFER, &buffer_draw); - gl_get_integerv(GL_READ_BUFFER, &buffer_read); + gl_GetIntegerv(GL_DRAW_BUFFER, &buffer_draw); + gl_GetIntegerv(GL_READ_BUFFER, &buffer_read); if( GL_COLOR == type - && buffer_draw == GL_FRONT - && buffer_read == GL_BACK + && GL_FRONT == buffer_draw + && GL_BACK == buffer_read ){ - glx_swap_buffers(dpy, drw); - gl_draw_buffer(GL_BACK); - gl_read_buffer(GL_FRONT); - gl_copy_pixels(x,y,width,height,type); - gl_draw_buffer(GL_FRONT); - gl_read_buffer(GL_BACK); + GLint rp[4] = {0,0,0,0}; + Window root; + int geom_x, geom_y; + unsigned geom_width, geom_height, border, depth; + gl_GetIntegerv(GL_CURRENT_RASTER_POSITION, rp); + X_GetGeometry(dpy, drw, &root, &geom_x, &geom_y, &geom_width, &geom_height, &border, &depth); + + glX_SwapBuffers(dpy, drw); + gl_DrawBuffer(GL_BACK); + gl_ReadBuffer(GL_FRONT); + gl_WindowPos3i(0,0,0); + gl_CopyPixels(0, 0, geom_width, geom_height, type); + gl_DrawBuffer(GL_FRONT); + gl_ReadBuffer(GL_BACK); + gl_WindowPos3i(rp[0],rp[1],rp[2]); } else { - gl_copy_pixels(x,y,width,height,type); + gl_CopyPixels(x,y,width,height,type); } } |