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New gamma ramp API.

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This commit is contained in:
Camilla Berglund
2013-05-19 15:46:44 +02:00
parent 6df692b61e
commit 5d308db654
8 changed files with 128 additions and 126 deletions
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src/cocoa_gamma.c
+27 -45
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@@ -30,6 +30,7 @@
#include "internal.h"
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <ApplicationServices/ApplicationServices.h>
@@ -41,64 +42,45 @@
void _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp)
{
// TODO: Support ramp sizes other than 256
uint32_t sampleCount;
int i;
CGGammaValue red[GLFW_GAMMA_RAMP_SIZE];
CGGammaValue green[GLFW_GAMMA_RAMP_SIZE];
CGGammaValue blue[GLFW_GAMMA_RAMP_SIZE];
if (CGDisplayGammaTableCapacity(monitor->ns.displayID) !=
GLFW_GAMMA_RAMP_SIZE)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Cocoa: Only gamma ramps of size 256 supported");
return;
}
uint32_t size = CGDisplayGammaTableCapacity(monitor->ns.displayID);
CGGammaValue* values = (CGGammaValue*) malloc(size * 3 * sizeof(CGGammaValue));
CGGetDisplayTransferByTable(monitor->ns.displayID,
GLFW_GAMMA_RAMP_SIZE,
red, green, blue,
&sampleCount);
size,
values,
values + size,
values + size * 2,
&size);
for (i = 0; i < GLFW_GAMMA_RAMP_SIZE; i++)
_glfwAllocGammaRamp(ramp, size);
for (int i = 0; i < size; i++)
{
ramp->red[i] = red[i] * 65535;
ramp->green[i] = green[i] * 65535;
ramp->blue[i] = blue[i] * 65535;
ramp->red[i] = (unsigned short) (values[i] * 65535);
ramp->green[i] = (unsigned short) (values[i + size] * 65535);
ramp->blue[i] = (unsigned short) (values[i + size * 2] * 65535);
}
free(values);
}
void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor, const GLFWgammaramp* ramp)
{
// TODO: Support ramp sizes other than 256
CGGammaValue* values = (CGGammaValue*) malloc(ramp->size * 3 * sizeof(CGGammaValue));
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];
if (CGDisplayGammaTableCapacity(monitor->ns.displayID) !=
GLFW_GAMMA_RAMP_SIZE)
for (int i = 0; i < ramp->size; i++)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Cocoa: Only gamma ramps of size 256 supported");
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;
values[i] = ramp->red[i] / 65535.f;
values[i + ramp->size] = ramp->green[i] / 65535.f;
values[i + ramp->size * 2] = ramp->blue[i] / 65535.f;
}
CGSetDisplayTransferByTable(monitor->ns.displayID,
GLFW_GAMMA_RAMP_SIZE,
red, green, blue);
ramp->size,
values,
values + ramp->size,
values + ramp->size * 2);
free(values);
}