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Merged fullscreen and monitor modules.

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This commit is contained in:
Camilla Berglund
2012-09-12 21:04:24 +02:00
parent c87829ea61
commit 55419bda67
9 changed files with 1082 additions and 1239 deletions
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src/win32_monitor.c
+243
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@@ -32,6 +32,8 @@
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <malloc.h>
// These constants are missing on MinGW
#ifndef EDS_ROTATEDMODE
@@ -42,6 +44,146 @@
#endif
//========================================================================
// Return closest video mode by dimensions, refresh rate and bits per pixel
//========================================================================
static GLboolean getClosestVideoMode(int* width, int* height,
int* bpp, int* refreshRate,
GLboolean exactBPP)
{
int mode, bestWidth, bestHeight, bestBPP, bestRate;
unsigned int sizeDiff, rateDiff, leastSizeDiff, leastRateDiff;
GLboolean foundMode = GL_FALSE;
DEVMODE dm;
leastSizeDiff = leastRateDiff = UINT_MAX;
for (mode = 0; ; mode++)
{
dm.dmSize = sizeof(DEVMODE);
if (!EnumDisplaySettings(NULL, mode, &dm))
break;
if (exactBPP && dm.dmBitsPerPel != *bpp)
continue;
sizeDiff = (abs(dm.dmBitsPerPel - *bpp) << 25) |
((dm.dmPelsWidth - *width) *
(dm.dmPelsWidth - *width) +
(dm.dmPelsHeight - *height) *
(dm.dmPelsHeight - *height));
if (*refreshRate > 0)
{
rateDiff = (dm.dmDisplayFrequency - *refreshRate) *
(dm.dmDisplayFrequency - *refreshRate);
}
else
{
// If no refresh rate was specified, then they're all the same
rateDiff = 0;
}
// We match first BPP, then screen area and last refresh rate
if ((sizeDiff < leastSizeDiff) ||
(sizeDiff == leastSizeDiff && (rateDiff < leastRateDiff)))
{
bestWidth = dm.dmPelsWidth;
bestHeight = dm.dmPelsHeight;
bestBPP = dm.dmBitsPerPel;
bestRate = dm.dmDisplayFrequency;
leastSizeDiff = sizeDiff;
leastRateDiff = rateDiff;
foundMode = GL_TRUE;
}
}
if (!foundMode)
return GL_FALSE;
*width = bestWidth;
*height = bestHeight;
*bpp = bestBPP;
// Only save the found refresh rate if the client requested a specific
// rate; otherwise keep it at zero to let Windows select the best rate
if (*refreshRate > 0)
*refreshRate = bestRate;
return GL_TRUE;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
//========================================================================
// Change the current video mode
//========================================================================
void _glfwSetVideoMode(int* width, int* height,
int* bpp, int* refreshRate,
GLboolean exactBPP)
{
DEVMODE dm;
int closestWidth, closestHeight, closestBPP, closestRate;
closestWidth = *width;
closestHeight = *height;
closestBPP = *bpp;
closestRate = *refreshRate;
if (getClosestVideoMode(&closestWidth, &closestHeight,
&closestBPP, &closestRate, GL_FALSE))
{
dm.dmSize = sizeof(DEVMODE);
dm.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL;
dm.dmPelsWidth = closestWidth;
dm.dmPelsHeight = closestHeight;
dm.dmBitsPerPel = closestBPP;
if (*refreshRate > 0)
{
dm.dmFields |= DM_DISPLAYFREQUENCY;
dm.dmDisplayFrequency = closestRate;
}
if (ChangeDisplaySettings(&dm, CDS_FULLSCREEN) == DISP_CHANGE_SUCCESSFUL)
{
*width = closestWidth;
*height = closestHeight;
*bpp = closestBPP;
*refreshRate = closestRate;
}
}
else
{
dm.dmSize = sizeof(DEVMODE);
EnumDisplaySettings(NULL, ENUM_REGISTRY_SETTINGS, &dm);
*width = dm.dmPelsWidth;
*height = dm.dmPelsHeight;
*bpp = dm.dmBitsPerPel;
*refreshRate = dm.dmDisplayFrequency;
}
}
//========================================================================
// Restore the previously saved (original) video mode
//========================================================================
void _glfwRestoreVideoMode(void)
{
ChangeDisplaySettings(NULL, CDS_FULLSCREEN);
}
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
@@ -164,3 +306,104 @@ void _glfwPlatformDestroyMonitor(_GLFWmonitor* monitor)
free(monitor->Win32.name);
}
//========================================================================
// Get a list of available video modes
//========================================================================
GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* found)
{
int modeIndex = 0, count = 0;
GLFWvidmode* result = NULL;
*found = 0;
for (;;)
{
int i;
GLFWvidmode mode;
DEVMODE dm;
ZeroMemory(&dm, sizeof(DEVMODE));
dm.dmSize = sizeof(DEVMODE);
if (!EnumDisplaySettings(monitor->Win32.name, modeIndex, &dm))
break;
modeIndex++;
if (dm.dmBitsPerPel < 15)
{
// Skip modes with less than 15 BPP
continue;
}
mode.width = dm.dmPelsWidth;
mode.height = dm.dmPelsHeight;
_glfwSplitBPP(dm.dmBitsPerPel,
&mode.redBits,
&mode.greenBits,
&mode.blueBits);
for (i = 0; i < *found; i++)
{
if (_glfwCompareVideoModes(result + i, &mode) == 0)
break;
}
if (i < *found)
{
// This is a duplicate, so skip it
continue;
}
if (*found == count)
{
void* larger;
if (count)
count *= 2;
else
count = 128;
larger = realloc(result, count * sizeof(GLFWvidmode));
if (!larger)
{
free(result);
_glfwSetError(GLFW_OUT_OF_MEMORY, NULL);
return NULL;
}
result = (GLFWvidmode*) larger;
}
result[*found] = mode;
(*found)++;
}
return result;
}
//========================================================================
// Get the current video mode for the specified monitor
//========================================================================
void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode)
{
DEVMODE dm;
ZeroMemory(&dm, sizeof(DEVMODE));
dm.dmSize = sizeof(DEVMODE);
EnumDisplaySettings(monitor->Win32.name, ENUM_REGISTRY_SETTINGS, &dm);
mode->width = dm.dmPelsWidth;
mode->height = dm.dmPelsHeight;
_glfwSplitBPP(dm.dmBitsPerPel,
&mode->redBits,
&mode->greenBits,
&mode->blueBits);
}