accelerants/3dfx/mode.cpp

18 IsThereEnoughFBMemory(const display_mode* mode, uint32 bitsPerPixel)
20 	// Test if there is enough Frame Buffer memory for the mode and color depth
23 	uint32 maxWidth = mode->virtual_width;
24 	if (mode->timing.h_display > maxWidth)
25 		maxWidth = mode->timing.h_display;
27 	uint32 maxHeight = mode->virtual_height;
28 	if (mode->timing.v_display > maxHeight)
29 		maxHeight = mode->timing.v_display;
39 IsModeUsable(const display_mode* mode)
41 	// Test if the display mode is usable by the current video chip.  That is,
42 	// does the chip have enough memory for the mode and is the pixel clock
45 	// Return true if the mode is usable.
50 	if (!TDFX_GetColorSpaceParams(mode->space, bitsPerPixel))
53 	// Is there enough frame buffer memory to handle the mode?
55 	if (!IsThereEnoughFBMemory(mode, bitsPerPixel))
58 	if (mode->timing.pixel_clock > si.maxPixelClock)
65 		if (mode->space == uint32(si.colorSpaces[j])) {
74 	// In clock doubled mode for 3DFX chips, widths must be divisible by 16
77 	if ((mode->timing.pixel_clock > si.maxPixelClock / 2)
78 			&& (mode->timing.h_display % 16) != 0)
84 	if (mode->timing.h_display == 640 && mode->timing.v_display < 480)
92 CreateModeList(bool (*checkMode)(const display_mode* mode))
96 	// Obtain EDID info which is needed for for building the mode list.  If
144 	// In clock doubled mode for 3DFX chips, widths must be divisible by 16
151 	// Search the mode list for the specified mode.
156 		display_mode& mode = gInfo.modeList[j];
158 		if (target->timing.h_display == mode.timing.h_display
159 			&& target->timing.v_display == mode.timing.v_display
160 			&& target->space == mode.space)
161 			return B_OK;	// mode found in list
164 	return B_BAD_VALUE;		// mode not found in list
171 	// First validate the mode, then call a function to set the registers.
176 	DisplayModeEx mode;
177 	(display_mode&)mode = *pMode;
179 	if (!TDFX_GetColorSpaceParams(mode.space, mode.bitsPerPixel))
182 	if (ProposeDisplayMode(&mode, pMode, pMode) != B_OK)
185 	mode.bytesPerPixel = (mode.bitsPerPixel + 7) / 8;
186 	mode.bytesPerRow = mode.timing.h_display * mode.bytesPerPixel;
188 	// Is there enough frame buffer memory for this mode?
190 	if ( ! IsThereEnoughFBMemory(&mode, mode.bitsPerPixel))
193 	TRACE("Set display mode: %dx%d  virtual size: %dx%d  "
195 		mode.timing.h_display, mode.timing.v_display,
196 		mode.virtual_width, mode.virtual_height, mode.bitsPerPixel);
198 	TRACE("   mode timing: %d  %d %d %d %d  %d %d %d %d\n",
199 		mode.timing.pixel_clock,
200 		mode.timing.h_display,
201 		mode.timing.h_sync_start, mode.timing.h_sync_end,
202 		mode.timing.h_total,
203 		mode.timing.v_display,
204 		mode.timing.v_sync_start, mode.timing.v_sync_end,
205 		mode.timing.v_total);
207 	TRACE("   mode hFreq: %.1f kHz  vFreq: %.1f Hz  %chSync %cvSync\n",
208 		double(mode.timing.pixel_clock) / mode.timing.h_total,
209 		((double(mode.timing.pixel_clock) / mode.timing.h_total) * 1000.0)
210 		/ mode.timing.v_total,
211 		(mode.timing.flags & B_POSITIVE_HSYNC) ? '+' : '-',
212 		(mode.timing.flags & B_POSITIVE_VSYNC) ? '+' : '-');
214 	status_t status = TDFX_SetDisplayMode(mode);
220 	si.displayMode = mode;
234 	DisplayModeEx& mode = gInfo.sharedInfo->displayMode;
236 	if (mode.timing.h_display + horizontalStart > mode.virtual_width
237 		|| mode.timing.v_display + verticalStart > mode.virtual_height)
240 	mode.h_display_start = horizontalStart;
241 	mode.v_display_start = verticalStart;
243 	TDFX_AdjustFrame(mode);
251 	// Return the number of display modes in the mode list.
272 	*current_mode = gInfo.sharedInfo->displayMode;	// return current display mode
294 GetPixelClockLimits(display_mode* mode, uint32* low, uint32* high)
296 	// Return the maximum and minium pixel clock limits for the specified mode.
301 	if (!TDFX_GetColorSpaceParams(mode->space, bitsPerPixel))
306 		uint32 totalClocks = (uint32)mode->timing.h_total
307 							* (uint32)mode->timing.v_total;
316 		// In clock doubled mode for 3DFX chips, widths must be divisible by 16
321 		if ((mode->timing.h_display % 16) != 0)