49f77fff14
Save in a few special cases, _X_EXPORT should not be used in C source files. Instead, it should be used in headers, and the proper C source include that header. Some special cases are symbols that need to be shared between modules, but not expected to be used by external drivers, and symbols that are accessible via LoaderSymbol/dlopen. This patch also adds conditionally some new sdk header files, depending on extensions enabled. These files were added to match pattern for other extensions/modules, that is, have the headers "deciding" symbol visibility in the sdk. These headers are: o Xext/panoramiXsrv.h, Xext/panoramiX.h o fbpict.h (unconditionally) o vidmodeproc.h o mioverlay.h (unconditionally, used only by xaa) o xfixes.h (unconditionally, symbols required by dri2) LoaderSymbol and similar functions now don't have different prototypes, in loaderProcs.h and xf86Module.h, so that both headers can be included, without the need of defining IN_LOADER. xf86NewInputDevice() device prototype readded to xf86Xinput.h, but not exported (and with a comment about it).
302 lines
9.9 KiB
C
302 lines
9.9 KiB
C
/*
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* Copyright 2005-2006 Luc Verhaegen.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* The reason for having this function in a file of its own is
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* so that ../utils/cvt/cvt can link to it, and that xf86CVTMode
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* code is shared directly.
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*/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#else
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#endif
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#include "xf86.h"
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#include "xf86Modes.h"
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#include <string.h>
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/*
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* Generate a CVT standard mode from HDisplay, VDisplay and VRefresh.
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*
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* These calculations are stolen from the CVT calculation spreadsheet written
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* by Graham Loveridge. He seems to be claiming no copyright and there seems to
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* be no license attached to this. He apparently just wants to see his name
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* mentioned.
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*
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* This file can be found at http://www.vesa.org/Public/CVT/CVTd6r1.xls
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*
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* Comments and structure corresponds to the comments and structure of the xls.
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* This should ease importing of future changes to the standard (not very
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* likely though).
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*
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* About margins; i'm sure that they are to be the bit between HDisplay and
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* HBlankStart, HBlankEnd and HTotal, VDisplay and VBlankStart, VBlankEnd and
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* VTotal, where the overscan colour is shown. FB seems to call _all_ blanking
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* outside sync "margin" for some reason. Since we prefer seeing proper
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* blanking instead of the overscan colour, and since the Crtc* values will
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* probably get altered after us, we will disable margins altogether. With
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* these calculations, Margins will plainly expand H/VDisplay, and we don't
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* want that. -- libv
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*
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*/
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DisplayModePtr
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xf86CVTMode(int HDisplay, int VDisplay, float VRefresh, Bool Reduced,
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Bool Interlaced)
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{
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DisplayModeRec *Mode = xnfcalloc(1, sizeof(DisplayModeRec));
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/* 1) top/bottom margin size (% of height) - default: 1.8 */
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#define CVT_MARGIN_PERCENTAGE 1.8
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/* 2) character cell horizontal granularity (pixels) - default 8 */
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#define CVT_H_GRANULARITY 8
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/* 4) Minimum vertical porch (lines) - default 3 */
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#define CVT_MIN_V_PORCH 3
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/* 4) Minimum number of vertical back porch lines - default 6 */
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#define CVT_MIN_V_BPORCH 6
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/* Pixel Clock step (kHz) */
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#define CVT_CLOCK_STEP 250
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Bool Margins = FALSE;
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float VFieldRate, HPeriod;
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int HDisplayRnd, HMargin;
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int VDisplayRnd, VMargin, VSync;
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float Interlace; /* Please rename this */
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/* CVT default is 60.0Hz */
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if (!VRefresh)
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VRefresh = 60.0;
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/* 1. Required field rate */
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if (Interlaced)
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VFieldRate = VRefresh * 2;
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else
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VFieldRate = VRefresh;
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/* 2. Horizontal pixels */
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HDisplayRnd = HDisplay - (HDisplay % CVT_H_GRANULARITY);
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/* 3. Determine left and right borders */
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if (Margins) {
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/* right margin is actually exactly the same as left */
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HMargin = (((float) HDisplayRnd) * CVT_MARGIN_PERCENTAGE / 100.0);
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HMargin -= HMargin % CVT_H_GRANULARITY;
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} else
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HMargin = 0;
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/* 4. Find total active pixels */
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Mode->HDisplay = HDisplayRnd + 2*HMargin;
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/* 5. Find number of lines per field */
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if (Interlaced)
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VDisplayRnd = VDisplay / 2;
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else
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VDisplayRnd = VDisplay;
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/* 6. Find top and bottom margins */
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/* nope. */
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if (Margins)
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/* top and bottom margins are equal again. */
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VMargin = (((float) VDisplayRnd) * CVT_MARGIN_PERCENTAGE / 100.0);
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else
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VMargin = 0;
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Mode->VDisplay = VDisplay + 2*VMargin;
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/* 7. Interlace */
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if (Interlaced)
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Interlace = 0.5;
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else
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Interlace = 0.0;
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/* Determine VSync Width from aspect ratio */
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if (!(VDisplay % 3) && ((VDisplay * 4 / 3) == HDisplay))
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VSync = 4;
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else if (!(VDisplay % 9) && ((VDisplay * 16 / 9) == HDisplay))
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VSync = 5;
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else if (!(VDisplay % 10) && ((VDisplay * 16 / 10) == HDisplay))
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VSync = 6;
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else if (!(VDisplay % 4) && ((VDisplay * 5 / 4) == HDisplay))
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VSync = 7;
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else if (!(VDisplay % 9) && ((VDisplay * 15 / 9) == HDisplay))
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VSync = 7;
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else /* Custom */
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VSync = 10;
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if (!Reduced) { /* simplified GTF calculation */
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/* 4) Minimum time of vertical sync + back porch interval (<28>s)
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* default 550.0 */
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#define CVT_MIN_VSYNC_BP 550.0
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/* 3) Nominal HSync width (% of line period) - default 8 */
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#define CVT_HSYNC_PERCENTAGE 8
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float HBlankPercentage;
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int VSyncAndBackPorch, VBackPorch;
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int HBlank;
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/* 8. Estimated Horizontal period */
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HPeriod = ((float) (1000000.0 / VFieldRate - CVT_MIN_VSYNC_BP)) /
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(VDisplayRnd + 2 * VMargin + CVT_MIN_V_PORCH + Interlace);
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/* 9. Find number of lines in sync + backporch */
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if (((int)(CVT_MIN_VSYNC_BP / HPeriod) + 1) < (VSync + CVT_MIN_V_PORCH))
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VSyncAndBackPorch = VSync + CVT_MIN_V_PORCH;
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else
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VSyncAndBackPorch = (int)(CVT_MIN_VSYNC_BP / HPeriod) + 1;
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/* 10. Find number of lines in back porch */
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VBackPorch = VSyncAndBackPorch - VSync;
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/* 11. Find total number of lines in vertical field */
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Mode->VTotal = VDisplayRnd + 2 * VMargin + VSyncAndBackPorch + Interlace
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+ CVT_MIN_V_PORCH;
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/* 5) Definition of Horizontal blanking time limitation */
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/* Gradient (%/kHz) - default 600 */
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#define CVT_M_FACTOR 600
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/* Offset (%) - default 40 */
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#define CVT_C_FACTOR 40
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/* Blanking time scaling factor - default 128 */
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#define CVT_K_FACTOR 128
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/* Scaling factor weighting - default 20 */
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#define CVT_J_FACTOR 20
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#define CVT_M_PRIME CVT_M_FACTOR * CVT_K_FACTOR / 256
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#define CVT_C_PRIME (CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
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CVT_J_FACTOR
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/* 12. Find ideal blanking duty cycle from formula */
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HBlankPercentage = CVT_C_PRIME - CVT_M_PRIME * HPeriod/1000.0;
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/* 13. Blanking time */
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if (HBlankPercentage < 20)
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HBlankPercentage = 20;
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HBlank = Mode->HDisplay * HBlankPercentage/(100.0 - HBlankPercentage);
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HBlank -= HBlank % (2*CVT_H_GRANULARITY);
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/* 14. Find total number of pixels in a line. */
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Mode->HTotal = Mode->HDisplay + HBlank;
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/* Fill in HSync values */
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Mode->HSyncEnd = Mode->HDisplay + HBlank / 2;
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Mode->HSyncStart = Mode->HSyncEnd -
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(Mode->HTotal * CVT_HSYNC_PERCENTAGE) / 100;
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Mode->HSyncStart += CVT_H_GRANULARITY -
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Mode->HSyncStart % CVT_H_GRANULARITY;
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/* Fill in VSync values */
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Mode->VSyncStart = Mode->VDisplay + CVT_MIN_V_PORCH;
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Mode->VSyncEnd = Mode->VSyncStart + VSync;
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} else { /* Reduced blanking */
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/* Minimum vertical blanking interval time (<28>s) - default 460 */
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#define CVT_RB_MIN_VBLANK 460.0
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/* Fixed number of clocks for horizontal sync */
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#define CVT_RB_H_SYNC 32.0
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/* Fixed number of clocks for horizontal blanking */
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#define CVT_RB_H_BLANK 160.0
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/* Fixed number of lines for vertical front porch - default 3 */
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#define CVT_RB_VFPORCH 3
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int VBILines;
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/* 8. Estimate Horizontal period. */
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HPeriod = ((float) (1000000.0 / VFieldRate - CVT_RB_MIN_VBLANK)) /
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(VDisplayRnd + 2*VMargin);
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/* 9. Find number of lines in vertical blanking */
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VBILines = ((float) CVT_RB_MIN_VBLANK) / HPeriod + 1;
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/* 10. Check if vertical blanking is sufficient */
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if (VBILines < (CVT_RB_VFPORCH + VSync + CVT_MIN_V_BPORCH))
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VBILines = CVT_RB_VFPORCH + VSync + CVT_MIN_V_BPORCH;
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/* 11. Find total number of lines in vertical field */
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Mode->VTotal = VDisplayRnd + 2 * VMargin + Interlace + VBILines;
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/* 12. Find total number of pixels in a line */
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Mode->HTotal = Mode->HDisplay + CVT_RB_H_BLANK;
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/* Fill in HSync values */
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Mode->HSyncEnd = Mode->HDisplay + CVT_RB_H_BLANK / 2;
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Mode->HSyncStart = Mode->HSyncEnd - CVT_RB_H_SYNC;
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/* Fill in VSync values */
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Mode->VSyncStart = Mode->VDisplay + CVT_RB_VFPORCH;
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Mode->VSyncEnd = Mode->VSyncStart + VSync;
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}
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/* 15/13. Find pixel clock frequency (kHz for xf86) */
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Mode->Clock = Mode->HTotal * 1000.0 / HPeriod;
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Mode->Clock -= Mode->Clock % CVT_CLOCK_STEP;
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/* 16/14. Find actual Horizontal Frequency (kHz) */
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Mode->HSync = ((float) Mode->Clock) / ((float) Mode->HTotal);
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/* 17/15. Find actual Field rate */
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Mode->VRefresh = (1000.0 * ((float) Mode->Clock)) /
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((float) (Mode->HTotal * Mode->VTotal));
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/* 18/16. Find actual vertical frame frequency */
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/* ignore - just set the mode flag for interlaced */
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if (Interlaced)
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Mode->VTotal *= 2;
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{
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char Name[256];
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Name[0] = 0;
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snprintf(Name, 256, "%dx%d", HDisplay, VDisplay);
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Mode->name = xnfalloc(strlen(Name) + 1);
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memcpy(Mode->name, Name, strlen(Name) + 1);
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}
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if (Reduced)
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Mode->Flags |= V_PHSYNC | V_NVSYNC;
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else
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Mode->Flags |= V_NHSYNC | V_PVSYNC;
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if (Interlaced)
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Mode->Flags |= V_INTERLACE;
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return Mode;
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}
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