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Diffstat (limited to 'src/lib/fake-w32-gdi.c')
| -rw-r--r-- | src/lib/fake-w32-gdi.c | 479 |
1 files changed, 0 insertions, 479 deletions
diff --git a/src/lib/fake-w32-gdi.c b/src/lib/fake-w32-gdi.c deleted file mode 100644 index 68847ca..0000000 --- a/src/lib/fake-w32-gdi.c +++ /dev/null @@ -1,479 +0,0 @@ -/* See LICENSE file for copyright and license details. */ -#ifndef HAVE_LIBGAMMA_METHOD_W32_GDI -# error Compiling fake-w32-gdi.c without FAKE_LIBGAMMA_METHOD_W32_GDI -#endif - -/* This file very sloppily translates Windows GDI calls to X RandR calls. - * It should by no means be used, without additional modification, as a - * part of a compatibility layer. The purpose of this file is only to make - * it possible to test for logical errors in Windows specific code on - * a GNU/Linux system under X. */ - - -#include "fake-w32-gdi.h" - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - - -#ifndef HAVE_LIBGAMMA_METHOD_X_RANDR -/* Use dummy translation */ - - - -/** - * Get the device context for a window or the entire screen - * - * @param hWnd The windows, `NULL` for the entire screen - * @return The device context - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd144871(v=vs.85).aspx - */ -HDC -GetDC(HWND hWnd) -{ - /* Just a non-NULL value */ - (void) hWnd; - return (HDC *)16; -} - - -/** - * Free a device context - * - * @param hWnd The window whose device context is `hDC`, `NULL` for the entire screen - * @param hDC The device context to free - * @return Whether the call was successful - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd162920(v=vs.85).aspx - */ -int -ReleaseDC(HWND hWnd, HDC hDC) -{ - /* Always successful */ - (void) hWnd; - (void) hDC; - return 1; -} - - - -/** - * Get information (capabilities) for a device context - * - * @param hDC The device context - * @param nIndex The information to retrieve, may be `COLORMGMTCAPS` - * @return The details of the queried information, can return `CM_GAMMA_RAMP` - * if `nIndex` is `COLORMGMTCAPS` - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd144877(v=vs.85).aspx - */ -int -GetDeviceCaps(HDC hDC, int nIndex) -{ - /* We have gamma ramps if the user asks for colour management capabilities */ - (void) hDC; - return CM_GAMMA_RAMP + nIndex - COLORMGMTCAPS; -} - - -/** - * Set the gamma ramps for a device - * - * @param hDC The device context - * @param lpRamp The gamma ramps joined in the order: red, green, blue - * This is a `WORD*` casted to `void*` - * @return Whether the call was successful - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd372194(v=vs.85).aspx - */ -BOOL -SetDeviceGammaRamp(HDC hDC, LPVOID restrict lpRamp) -{ - /* Always successful */ - (void) hDC; - (void) lpRamp; - return TRUE; -} - - -/** - * Get the current gamma ramps for a device - * - * @param hDC The device context - * @param lpRamp The output for the gamma ramps joined in the order: red, green, blue - * This is a `WORD *` casted to `void *` - * @return Whether the call was successful - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd316946(v=vs.85).aspx - */ -BOOL -GetDeviceGammaRamp(HDC hDC, LPVOID restrict lpRamp) -{ - /* Always successful */ - (void) hDC; - (void) lpRamp; - return TRUE; -} - - - -/** - * Get the context for a device - * - * @param lpszDriver The driver or a display device, use "DISPLAY" if you want a display - * @param lpszDevice The name of the device. If you want a display use can use the member - * name `DeviceName` in the third parameter, an output parameter, of - * `EnumDisplayDevices` - * @param lpszOutput We will always use `NULL` here - * @param lpInitData We will always use `NULL` here; this should actually by a `const DEVMODE *` - * @return The context for the device - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd183490(v=vs.85).aspx - */ -HDC -CreateDC(LPCTSTR restrict lpszDriver, LPCTSTR restrict lpszDevice, LPCTSTR restrict lpszOutput, const void *restrict lpInitData) -{ - /* `NULL` if not asking for a CRTC, otherwise a non-NULL value */ - (void) lpszOutput; - (void) lpInitData; - (void) lpszDevice; - return !strcmp(lpszDriver, "DISPLAY") ? (HDC *)16 : NULL; -} - - -/** - * Get a display device by its name or index - * - * @param lpDevice The name of the device, use `NULL` to base the call on `iDevNum` instead - * @param iDevNum The index of the device - * @param lpDisplayDevice Output for the found device - * @param dwFlags Flags, we will always use zero - * @return Whether the call was successful; zero is also returned if `iDevNum` - * is greater than the largest device index on the system - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd162609(v=vs.85).aspx - */ -BOOL -EnumDisplayDevices(LPCTSTR lpDevice, restrict DWORD iDevNum, PDISPLAY_DEVICE restrict lpDisplayDevice, DWORD dwFlags) -{ - (void) dwFlags; - /* Check correctness of `lpDevice` */ - if (lpDevice) { - fprintf(stderr, "lpDevice (argument 1) for EnumDisplayDevices should be NULL\n"); - abort(); - return FALSE; - } - /* Pretend that we have two CRTC:s */ - if (iDevNum >= 2) - return FALSE; - /* Check correctness of `lpDisplayDevice` */ - if (lpDisplayDevice->cb != sizeof(DISPLAY_DEVICE)) { - fprintf(stderr, "lpDisplayDevice->cb for EnumDisplayDevices is not sizeof(DISPLAY_DEVICE)\n"); - abort(); - return FALSE; - } - /* Store an arbitrary name for the monitor */ - strcmp(lpDisplayDevice->DeviceName, "some monitor"); - /* The connector is always enabled */ - lpDisplayDevice->StateFlags = DISPLAY_DEVICE_ACTIVE; - return TRUE; -} - - -#else -/* Use translation to X RandR */ - - -#include <xcb/xcb.h> -#include <xcb/randr.h> - - -/** - * The gamma ramp size that devices will - * always have in Windows GDI - */ -#define GAMMA_RAMP_SIZE 256 - - -/** - * Connection to the X RandR display - */ -static xcb_connection_t *restrict connection = NULL; - -/** - * Resouces for the screen - * - * We only have one screen, again this - * is a very sloppy compatibility layer - */ -static xcb_randr_get_screen_resources_current_reply_t *restrict res_reply = NULL; - -/** - * The number of available CRTC:s, -1 if not known yet - */ -static ssize_t crtc_count = -1; - -/** - * List of X RandR CRTC:s - */ -static xcb_randr_crtc_t *restrict crtcs = NULL; - -/** - * The number of opened CRTC:s - */ -static size_t dc_count = 0; - - - -/** - * Get the device context for a window or the entire screen - * - * @param hWnd The windows, `NULL` for the entire screen - * @return The device context - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd144871(v=vs.85).aspx - */ -HDC -GetDC(HWND hWnd) -{ - /* Return the primary CRTC */ - (void) hWnd; - return CreateDC(TEXT("DISPLAY"), "0", NULL, NULL); -} - - -/** - * Free a device context - * - * @param hWnd The window whose device context is `hDC`, `NULL` for the entire screen - * @param hDC The device context to free - * @return Whether the call was successful - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd162920(v=vs.85).aspx - */ -int -ReleaseDC(HWND hWnd, HDC hDC) -{ - /* Disconnect from the RandR display when all monitors have been closed */ - (void) hWnd; - (void) hDC; - if (!dc_count--) { - if (connection) { - xcb_disconnect(connection); - connection = NULL; - } - free(res_reply); - res_reply = NULL; - } - return 1; -} - - - -/** - * Get information (capabilities) for a device context - * - * @param hDC The device context - * @param nIndex The information to retrieve, may be `COLORMGMTCAPS` - * @return The details of the queried information, can return `CM_GAMMA_RAMP` - * if `nIndex` is `COLORMGMTCAPS` - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd144877(v=vs.85).aspx - */ -int -GetDeviceCaps(HDC hDC, int nIndex) -{ - /* We have gamma ramps if the user asks for colour management capabilities */ - (void) hDC; - return CM_GAMMA_RAMP + nIndex - COLORMGMTCAPS; -} - - -/* xcb violates the rule to never return `struct`:s */ -#ifdef __GNUC__ -# pragma GCC diagnostic push -# pragma GCC diagnostic ignored "-Waggregate-return" -#endif - - -/** - * Set the gamma ramps for a device - * - * @param hDC The device context - * @param lpRamp The gamma ramps joined in the order: red, green, blue - * This is a `WORD *` casted to `void *` - * @return Whether the call was successful - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd372194(v=vs.85).aspx - */ -BOOL -SetDeviceGammaRamp(HDC hDC, LPVOID restrict lpRamp) -{ - /* We assume that our gamma ramps are of the same size - * as used by Windows GDI (we are so sloppy) */ - xcb_void_cookie_t gamma_cookie = - xcb_randr_set_crtc_gamma_checked(connection, *(xcb_randr_crtc_t *)hDC, GAMMA_RAMP_SIZE, - &((uint16_t *)lpRamp)[0 * GAMMA_RAMP_SIZE], - &((uint16_t *)lpRamp)[1 * GAMMA_RAMP_SIZE], - &((uint16_t *)lpRamp)[2 * GAMMA_RAMP_SIZE)]; - xcb_generic_error_t *error = xcb_request_check(connection, gamma_cookie); - return !error ? TRUE : FALSE; -} - - -/** - * Get the current gamma ramps for a device - * - * @param hDC The device context - * @param lpRamp The output for the gamma ramps joined in the order: red, green, blue - * This is a `WORD *` casted to `void *` - * @return Whether the call was successful - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd316946(v=vs.85).aspx - */ -BOOL -GetDeviceGammaRamp(HDC hDC, LPVOID restrict lpRamp) -{ - xcb_randr_get_crtc_gamma_cookie_t gamma_cookie; - xcb_randr_get_crtc_gamma_reply_t *restrict gamma_reply; - xcb_generic_error_t *error; - - /* Read current gamma ramps */ - gamma_cookie = xcb_randr_get_crtc_gamma(connection, *(xcb_randr_crtc_t *)hDC); - gamma_reply = xcb_randr_get_crtc_gamma_reply(connection, gamma_cookie, &error); - if (error) - return FALSE; - -#define DEST_RAMP(I) (&((uint16_t *)lpRamp)[(I) * GAMMA_RAMP_SIZE]) -#define SRC_RAMP(C) (xcb_randr_get_crtc_gamma_##C(gamma_reply)) - - /* Copy the ramps into the output parameter (coalesced) */ - memcpy(DEST_RAMP(0), SRC_RAMP(red), GAMMA_RAMP_SIZE * sizeof(uint16_t)); - memcpy(DEST_RAMP(1), SRC_RAMP(green), GAMMA_RAMP_SIZE * sizeof(uint16_t)); - memcpy(DEST_RAMP(2), SRC_RAMP(blue), GAMMA_RAMP_SIZE * sizeof(uint16_t)); - -#undef SRC_RAMP -#undef DEST_RAMP - - free(gamma_reply); - return TRUE; -} - - - -/** - * Get the context for a device - * - * @param lpszDriver The driver or a display device, use "DISPLAY" if you want a display - * @param lpszDevice The name of the device. If you want a display use can use the member - * name `DeviceName` in the third parameter, an output parameter, of - * `EnumDisplayDevices` - * @param lpszOutput We will always use `NULL` here - * @param lpInitData We will always use `NULL` here; this should actually by a `const DEVMODE *` - * @return The context for the device - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd183490(v=vs.85).aspx - */ -HDC -CreateDC(LPCTSTR restrict lpszDriver, LPCTSTR restrict lpszDevice, LPCTSTR restrict lpszOutput, const void *restrict lpInitData) -{ - int crtc_index = atoi(lpszDevice); - xcb_generic_error_t *error; - xcb_screen_iterator_t iter; - xcb_randr_get_screen_resources_current_cookie_t res_cookie; - - (void) lpszOutput; - (void) lpInitData; - - /* Check correctness of input */ - if (strcmp(lpszDriver, "DISPLAY")) - return NULL; - - /* Connect to the display and get screen data if not already done so */ - if (!dc_count) { - /* Connect to the display */ - connection = xcb_connect(NULL, NULL); - /* Get the first screen */ - iter = xcb_setup_roots_iterator(xcb_get_setup(connection)); - /* Get the resources of the screen */ - res_cookie = xcb_randr_get_screen_resources_current(connection, iter.data->root); - res_reply = xcb_randr_get_screen_resources_current_reply(connection, res_cookie, &error); - if (error) { - fprintf(stderr, "Failed to open X connection\n"); - xcb_disconnect(connection); - crtc_count = -1; - return NULL; - } - - /* Get the number of CRTC:s */ - crtc_count = res_reply->num_crtcs; - /* Get the CRTC ID:s */ - crtcs = xcb_randr_get_screen_resources_current_crtcs(res_reply); - } - - /* Was the index too high */ - if (crtc_index >= crtc_count) { - /* Disconnect and release resouces and mark that - we do not know the number of available CRTC:s - if we have not opened any monitors yet */ - if (!dc_count) { - xcb_disconnect(connection); - free(res_reply); - res_reply = NULL; - crtc_count = -1; - } - return NULL; - } - - /* We have opened a new CRTC */ - dc_count++; - /* Return the ID of the CRTC */ - return &crtcs[crtc_index]; -} - - -#ifdef __GNUC__ -# pragma GCC diagnostic pop -#endif - - -/** - * Get a display device by its name or index - * - * @param lpDevice The name of the device, use `NULL` to base the call on `iDevNum` instead - * @param iDevNum The index of the device - * @param lpDisplayDevice Output for the found device - * @param dwFlags Flags, we will always use zero - * @return Whether the call was successful; zero is also returned if `iDevNum` - * is greater than the largest device index on the system - * @see http://msdn.microsoft.com/en-us/library/windows/desktop/dd162609(v=vs.85).aspx - */ -BOOL -EnumDisplayDevices(LPCTSTR restrict lpDevice, DWORD iDevNum, PDISPLAY_DEVICE restrict lpDisplayDevice, DWORD dwFlags) -{ - size_t count = (size_t)crtc_count; - - (void) dwFlags; - - /* Check the correctness of the input */ - if (lpDevice) { - fprintf(stderr, "lpDevice (argument 1) for EnumDisplayDevices should be NULL\n"); - abort(); - return FALSE; - } - /* Do we know how many CRTC:s are available? */ - if (crtc_count < 0) { - /* If not open the first CRTC so that will be figured out */ - if (!GetDC(NULL)) - return FALSE; - count = (size_t)crtc_count; - /* Close the primary monitor that we just closed */ - ReleaseDC(NULL, NULL); - } - /* Check that the request CRTC exists */ - if (iDevNum >= count) - return FALSE; - /* Check the correctness of the input */ - if (lpDisplayDevice->cb != sizeof(DISPLAY_DEVICE)) { - fprintf(stderr, "lpDisplayDevice->cb for EnumDisplayDevices is not sizeof(DISPLAY_DEVICE)\n"); - abort(); - return FALSE; - } - /* Store name for the CRTC */ - sprintf(lpDisplayDevice->DeviceName, "%i", iDevNum); - /* The connector that the CRTC belongs to is enabled */ - lpDisplayDevice->StateFlags = DISPLAY_DEVICE_ACTIVE; - return TRUE; -} - - -#endif |