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Merge branch 'cocoa-gamma' of git://github.com/raedwulf/glfw

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This commit is contained in:
Camilla Berglund 2011-09-20 14:26:13 +02:00
commit 0d0951b7eb
3 changed files with 71 additions and 8 deletions
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42
src/cocoa_gamma.m
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@ -43,6 +43,27 @@
void _glfwPlatformGetGammaRamp(GLFWgammaramp* ramp)
{
uint32_t sampleCount;
int i;
CGGammaValue red[GLFW_GAMMA_RAMP_SIZE];
CGGammaValue green[GLFW_GAMMA_RAMP_SIZE];
CGGammaValue blue[GLFW_GAMMA_RAMP_SIZE];
// For now, don't support anything that is not GLFW_GAMMA_RAMP_SIZE
// i.e. 256. I don't think anyone would want to change the gamma on
// Mac anyway...
if (_glfwLibrary.originalRampSize != GLFW_GAMMA_RAMP_SIZE)
return;
CGGetDisplayTransferByTable(CGMainDisplayID(), GLFW_GAMMA_RAMP_SIZE, red, green, blue,
&sampleCount);
for (i = 0; i < GLFW_GAMMA_RAMP_SIZE; i++)
{
ramp->red[i] = red[i] * 65535;
ramp->green[i] = green[i] * 65535;
ramp->blue[i] = blue[i] * 65535;
}
}
@ -52,5 +73,26 @@ void _glfwPlatformGetGammaRamp(GLFWgammaramp* ramp)
void _glfwPlatformSetGammaRamp(const GLFWgammaramp* ramp)
{
int i;
int size = GLFW_GAMMA_RAMP_SIZE;
CGGammaValue red[GLFW_GAMMA_RAMP_SIZE];
CGGammaValue green[GLFW_GAMMA_RAMP_SIZE];
CGGammaValue blue[GLFW_GAMMA_RAMP_SIZE];
// For now, don't support anything that is not GLFW_GAMMA_RAMP_SIZE
// i.e. 256. I don't think anyone would want to change the gamma on
// Mac anyway...
if (_glfwLibrary.originalRampSize != GLFW_GAMMA_RAMP_SIZE)
return;
// Convert to float & take the difference of the original gamma and
// the linear function.
for (i = 0; i < size; i++)
{
red[i] = ramp->red[i] / 65535.f;
green[i] = ramp->green[i] / 65535.f;
blue[i] = ramp->blue[i] / 65535.f;
}
CGSetDisplayTransferByTable(CGMainDisplayID(), GLFW_GAMMA_RAMP_SIZE, red, green, blue);
}

7
src/cocoa_init.m
View File

@ -225,6 +225,10 @@ int _glfwPlatformInit(void)
_glfwLibrary.NS.desktopMode =
(NSDictionary*) CGDisplayCurrentMode(CGMainDisplayID());
// Save the original gamma ramp
_glfwLibrary.originalRampSize = CGDisplayGammaTableCapacity(CGMainDisplayID());
_glfwPlatformGetGammaRamp(&_glfwLibrary.originalRamp);
return GL_TRUE;
}
@ -236,6 +240,9 @@ int _glfwPlatformTerminate(void)
{
// TODO: Probably other cleanup
// Restore the original gamma ramp
_glfwPlatformSetGammaRamp(&_glfwLibrary.originalRamp);
[NSApp setDelegate:nil];
[_glfwLibrary.NS.delegate release];
_glfwLibrary.NS.delegate = nil;

22
src/gamma.c
View File

@ -62,6 +62,10 @@ GLFWAPI void glfwSetGamma(float gamma)
for (i = 0; i < size; i++)
{
float value = (float) i / ((float) (size - 1));
int diffRed, diffGreen, diffBlue, newRed, newGreen, newBlue, pow1;
// Reference our gamma 1.0f
pow1 = value * 65535.f + 0.5;
// Apply gamma
value = (float) pow(value, 1.f / gamma) * 65535.f + 0.5f;
@ -72,10 +76,20 @@ GLFWAPI void glfwSetGamma(float gamma)
else if (value > 65535.f)
value = 65535.f;
// Set the gamma ramp values
ramp.red[i] = (unsigned short) value;
ramp.green[i] = (unsigned short) value;
ramp.blue[i] = (unsigned short) value;
// Use original gamma as reference
diffRed = _glfwLibrary.originalRamp.red[i] - pow1;
diffGreen = _glfwLibrary.originalRamp.green[i] - pow1;
diffBlue = _glfwLibrary.originalRamp.blue[i] - pow1;
// Calculate new values
newRed = diffRed + (unsigned short) value;
newGreen = diffGreen + (unsigned short) value;
newBlue = diffBlue + (unsigned short) value;
// Set the gamma ramp values (whilst clamping)
ramp.red[i] = newRed > 65535 ? 65535 : newRed < 0 ? 0 : newRed;
ramp.green[i] = newGreen > 65535 ? 65535 : newGreen < 0 ? 0 : newGreen;
ramp.blue[i] = newBlue > 65535 ? 65535 : newBlue < 0 ? 0 : newBlue;
}
glfwSetGammaRamp(&ramp);