diff options
Diffstat (limited to 'vendor/github.com/go-gl/glfw/v3.3/glfw/glfw/src/monitor.c')
| -rw-r--r-- | vendor/github.com/go-gl/glfw/v3.3/glfw/glfw/src/monitor.c | 542 |
1 files changed, 542 insertions, 0 deletions
diff --git a/vendor/github.com/go-gl/glfw/v3.3/glfw/glfw/src/monitor.c b/vendor/github.com/go-gl/glfw/v3.3/glfw/glfw/src/monitor.c new file mode 100644 index 0000000..7341141 --- /dev/null +++ b/vendor/github.com/go-gl/glfw/v3.3/glfw/glfw/src/monitor.c @@ -0,0 +1,542 @@ +//======================================================================== +// GLFW 3.3 - www.glfw.org +//------------------------------------------------------------------------ +// Copyright (c) 2002-2006 Marcus Geelnard +// Copyright (c) 2006-2019 Camilla Löwy <elmindreda@glfw.org> +// +// This software is provided 'as-is', without any express or implied +// warranty. In no event will the authors be held liable for any damages +// arising from the use of this software. +// +// Permission is granted to anyone to use this software for any purpose, +// including commercial applications, and to alter it and redistribute it +// freely, subject to the following restrictions: +// +// 1. The origin of this software must not be misrepresented; you must not +// claim that you wrote the original software. If you use this software +// in a product, an acknowledgment in the product documentation would +// be appreciated but is not required. +// +// 2. Altered source versions must be plainly marked as such, and must not +// be misrepresented as being the original software. +// +// 3. This notice may not be removed or altered from any source +// distribution. +// +//======================================================================== +// Please use C89 style variable declarations in this file because VS 2010 +//======================================================================== + +#include "internal.h" + +#include <assert.h> +#include <math.h> +#include <float.h> +#include <string.h> +#include <stdlib.h> +#include <limits.h> + + +// Lexically compare video modes, used by qsort +// +static int compareVideoModes(const void* fp, const void* sp) +{ + const GLFWvidmode* fm = fp; + const GLFWvidmode* sm = sp; + const int fbpp = fm->redBits + fm->greenBits + fm->blueBits; + const int sbpp = sm->redBits + sm->greenBits + sm->blueBits; + const int farea = fm->width * fm->height; + const int sarea = sm->width * sm->height; + + // First sort on color bits per pixel + if (fbpp != sbpp) + return fbpp - sbpp; + + // Then sort on screen area + if (farea != sarea) + return farea - sarea; + + // Then sort on width + if (fm->width != sm->width) + return fm->width - sm->width; + + // Lastly sort on refresh rate + return fm->refreshRate - sm->refreshRate; +} + +// Retrieves the available modes for the specified monitor +// +static GLFWbool refreshVideoModes(_GLFWmonitor* monitor) +{ + int modeCount; + GLFWvidmode* modes; + + if (monitor->modes) + return GLFW_TRUE; + + modes = _glfwPlatformGetVideoModes(monitor, &modeCount); + if (!modes) + return GLFW_FALSE; + + qsort(modes, modeCount, sizeof(GLFWvidmode), compareVideoModes); + + free(monitor->modes); + monitor->modes = modes; + monitor->modeCount = modeCount; + + return GLFW_TRUE; +} + + +////////////////////////////////////////////////////////////////////////// +////// GLFW event API ////// +////////////////////////////////////////////////////////////////////////// + +// Notifies shared code of a monitor connection or disconnection +// +void _glfwInputMonitor(_GLFWmonitor* monitor, int action, int placement) +{ + if (action == GLFW_CONNECTED) + { + _glfw.monitorCount++; + _glfw.monitors = + realloc(_glfw.monitors, sizeof(_GLFWmonitor*) * _glfw.monitorCount); + + if (placement == _GLFW_INSERT_FIRST) + { + memmove(_glfw.monitors + 1, + _glfw.monitors, + ((size_t) _glfw.monitorCount - 1) * sizeof(_GLFWmonitor*)); + _glfw.monitors[0] = monitor; + } + else + _glfw.monitors[_glfw.monitorCount - 1] = monitor; + } + else if (action == GLFW_DISCONNECTED) + { + int i; + _GLFWwindow* window; + + for (window = _glfw.windowListHead; window; window = window->next) + { + if (window->monitor == monitor) + { + int width, height, xoff, yoff; + _glfwPlatformGetWindowSize(window, &width, &height); + _glfwPlatformSetWindowMonitor(window, NULL, 0, 0, width, height, 0); + _glfwPlatformGetWindowFrameSize(window, &xoff, &yoff, NULL, NULL); + _glfwPlatformSetWindowPos(window, xoff, yoff); + } + } + + for (i = 0; i < _glfw.monitorCount; i++) + { + if (_glfw.monitors[i] == monitor) + { + _glfw.monitorCount--; + memmove(_glfw.monitors + i, + _glfw.monitors + i + 1, + ((size_t) _glfw.monitorCount - i) * sizeof(_GLFWmonitor*)); + break; + } + } + } + + if (_glfw.callbacks.monitor) + _glfw.callbacks.monitor((GLFWmonitor*) monitor, action); + + if (action == GLFW_DISCONNECTED) + _glfwFreeMonitor(monitor); +} + +// Notifies shared code that a full screen window has acquired or released +// a monitor +// +void _glfwInputMonitorWindow(_GLFWmonitor* monitor, _GLFWwindow* window) +{ + monitor->window = window; +} + + +////////////////////////////////////////////////////////////////////////// +////// GLFW internal API ////// +////////////////////////////////////////////////////////////////////////// + +// Allocates and returns a monitor object with the specified name and dimensions +// +_GLFWmonitor* _glfwAllocMonitor(const char* name, int widthMM, int heightMM) +{ + _GLFWmonitor* monitor = calloc(1, sizeof(_GLFWmonitor)); + monitor->widthMM = widthMM; + monitor->heightMM = heightMM; + + strncpy(monitor->name, name, sizeof(monitor->name) - 1); + + return monitor; +} + +// Frees a monitor object and any data associated with it +// +void _glfwFreeMonitor(_GLFWmonitor* monitor) +{ + if (monitor == NULL) + return; + + _glfwPlatformFreeMonitor(monitor); + + _glfwFreeGammaArrays(&monitor->originalRamp); + _glfwFreeGammaArrays(&monitor->currentRamp); + + free(monitor->modes); + free(monitor); +} + +// Allocates red, green and blue value arrays of the specified size +// +void _glfwAllocGammaArrays(GLFWgammaramp* ramp, unsigned int size) +{ + ramp->red = calloc(size, sizeof(unsigned short)); + ramp->green = calloc(size, sizeof(unsigned short)); + ramp->blue = calloc(size, sizeof(unsigned short)); + ramp->size = size; +} + +// Frees the red, green and blue value arrays and clears the struct +// +void _glfwFreeGammaArrays(GLFWgammaramp* ramp) +{ + free(ramp->red); + free(ramp->green); + free(ramp->blue); + + memset(ramp, 0, sizeof(GLFWgammaramp)); +} + +// Chooses the video mode most closely matching the desired one +// +const GLFWvidmode* _glfwChooseVideoMode(_GLFWmonitor* monitor, + const GLFWvidmode* desired) +{ + int i; + unsigned int sizeDiff, leastSizeDiff = UINT_MAX; + unsigned int rateDiff, leastRateDiff = UINT_MAX; + unsigned int colorDiff, leastColorDiff = UINT_MAX; + const GLFWvidmode* current; + const GLFWvidmode* closest = NULL; + + if (!refreshVideoModes(monitor)) + return NULL; + + for (i = 0; i < monitor->modeCount; i++) + { + current = monitor->modes + i; + + colorDiff = 0; + + if (desired->redBits != GLFW_DONT_CARE) + colorDiff += abs(current->redBits - desired->redBits); + if (desired->greenBits != GLFW_DONT_CARE) + colorDiff += abs(current->greenBits - desired->greenBits); + if (desired->blueBits != GLFW_DONT_CARE) + colorDiff += abs(current->blueBits - desired->blueBits); + + sizeDiff = abs((current->width - desired->width) * + (current->width - desired->width) + + (current->height - desired->height) * + (current->height - desired->height)); + + if (desired->refreshRate != GLFW_DONT_CARE) + rateDiff = abs(current->refreshRate - desired->refreshRate); + else + rateDiff = UINT_MAX - current->refreshRate; + + if ((colorDiff < leastColorDiff) || + (colorDiff == leastColorDiff && sizeDiff < leastSizeDiff) || + (colorDiff == leastColorDiff && sizeDiff == leastSizeDiff && rateDiff < leastRateDiff)) + { + closest = current; + leastSizeDiff = sizeDiff; + leastRateDiff = rateDiff; + leastColorDiff = colorDiff; + } + } + + return closest; +} + +// Performs lexical comparison between two @ref GLFWvidmode structures +// +int _glfwCompareVideoModes(const GLFWvidmode* fm, const GLFWvidmode* sm) +{ + return compareVideoModes(fm, sm); +} + +// Splits a color depth into red, green and blue bit depths +// +void _glfwSplitBPP(int bpp, int* red, int* green, int* blue) +{ + int delta; + + // We assume that by 32 the user really meant 24 + if (bpp == 32) + bpp = 24; + + // Convert "bits per pixel" to red, green & blue sizes + + *red = *green = *blue = bpp / 3; + delta = bpp - (*red * 3); + if (delta >= 1) + *green = *green + 1; + + if (delta == 2) + *red = *red + 1; +} + + +////////////////////////////////////////////////////////////////////////// +////// GLFW public API ////// +////////////////////////////////////////////////////////////////////////// + +GLFWAPI GLFWmonitor** glfwGetMonitors(int* count) +{ + assert(count != NULL); + + *count = 0; + + _GLFW_REQUIRE_INIT_OR_RETURN(NULL); + + *count = _glfw.monitorCount; + return (GLFWmonitor**) _glfw.monitors; +} + +GLFWAPI GLFWmonitor* glfwGetPrimaryMonitor(void) +{ + _GLFW_REQUIRE_INIT_OR_RETURN(NULL); + + if (!_glfw.monitorCount) + return NULL; + + return (GLFWmonitor*) _glfw.monitors[0]; +} + +GLFWAPI void glfwGetMonitorPos(GLFWmonitor* handle, int* xpos, int* ypos) +{ + _GLFWmonitor* monitor = (_GLFWmonitor*) handle; + assert(monitor != NULL); + + if (xpos) + *xpos = 0; + if (ypos) + *ypos = 0; + + _GLFW_REQUIRE_INIT(); + + _glfwPlatformGetMonitorPos(monitor, xpos, ypos); +} + +GLFWAPI void glfwGetMonitorWorkarea(GLFWmonitor* handle, + int* xpos, int* ypos, + int* width, int* height) +{ + _GLFWmonitor* monitor = (_GLFWmonitor*) handle; + assert(monitor != NULL); + + if (xpos) + *xpos = 0; + if (ypos) + *ypos = 0; + if (width) + *width = 0; + if (height) + *height = 0; + + _GLFW_REQUIRE_INIT(); + + _glfwPlatformGetMonitorWorkarea(monitor, xpos, ypos, width, height); +} + +GLFWAPI void glfwGetMonitorPhysicalSize(GLFWmonitor* handle, int* widthMM, int* heightMM) +{ + _GLFWmonitor* monitor = (_GLFWmonitor*) handle; + assert(monitor != NULL); + + if (widthMM) + *widthMM = 0; + if (heightMM) + *heightMM = 0; + + _GLFW_REQUIRE_INIT(); + + if (widthMM) + *widthMM = monitor->widthMM; + if (heightMM) + *heightMM = monitor->heightMM; +} + +GLFWAPI void glfwGetMonitorContentScale(GLFWmonitor* handle, + float* xscale, float* yscale) +{ + _GLFWmonitor* monitor = (_GLFWmonitor*) handle; + assert(monitor != NULL); + + if (xscale) + *xscale = 0.f; + if (yscale) + *yscale = 0.f; + + _GLFW_REQUIRE_INIT(); + _glfwPlatformGetMonitorContentScale(monitor, xscale, yscale); +} + +GLFWAPI const char* glfwGetMonitorName(GLFWmonitor* handle) +{ + _GLFWmonitor* monitor = (_GLFWmonitor*) handle; + assert(monitor != NULL); + + _GLFW_REQUIRE_INIT_OR_RETURN(NULL); + return monitor->name; +} + +GLFWAPI void glfwSetMonitorUserPointer(GLFWmonitor* handle, void* pointer) +{ + _GLFWmonitor* monitor = (_GLFWmonitor*) handle; + assert(monitor != NULL); + + _GLFW_REQUIRE_INIT(); + monitor->userPointer = pointer; +} + +GLFWAPI void* glfwGetMonitorUserPointer(GLFWmonitor* handle) +{ + _GLFWmonitor* monitor = (_GLFWmonitor*) handle; + assert(monitor != NULL); + + _GLFW_REQUIRE_INIT_OR_RETURN(NULL); + return monitor->userPointer; +} + +GLFWAPI GLFWmonitorfun glfwSetMonitorCallback(GLFWmonitorfun cbfun) +{ + _GLFW_REQUIRE_INIT_OR_RETURN(NULL); + _GLFW_SWAP_POINTERS(_glfw.callbacks.monitor, cbfun); + return cbfun; +} + +GLFWAPI const GLFWvidmode* glfwGetVideoModes(GLFWmonitor* handle, int* count) +{ + _GLFWmonitor* monitor = (_GLFWmonitor*) handle; + assert(monitor != NULL); + assert(count != NULL); + + *count = 0; + + _GLFW_REQUIRE_INIT_OR_RETURN(NULL); + + if (!refreshVideoModes(monitor)) + return NULL; + + *count = monitor->modeCount; + return monitor->modes; +} + +GLFWAPI const GLFWvidmode* glfwGetVideoMode(GLFWmonitor* handle) +{ + _GLFWmonitor* monitor = (_GLFWmonitor*) handle; + assert(monitor != NULL); + + _GLFW_REQUIRE_INIT_OR_RETURN(NULL); + + _glfwPlatformGetVideoMode(monitor, &monitor->currentMode); + return &monitor->currentMode; +} + +GLFWAPI void glfwSetGamma(GLFWmonitor* handle, float gamma) +{ + unsigned int i; + unsigned short* values; + GLFWgammaramp ramp; + const GLFWgammaramp* original; + assert(handle != NULL); + assert(gamma > 0.f); + assert(gamma <= FLT_MAX); + + _GLFW_REQUIRE_INIT(); + + if (gamma != gamma || gamma <= 0.f || gamma > FLT_MAX) + { + _glfwInputError(GLFW_INVALID_VALUE, "Invalid gamma value %f", gamma); + return; + } + + original = glfwGetGammaRamp(handle); + if (!original) + return; + + values = calloc(original->size, sizeof(unsigned short)); + + for (i = 0; i < original->size; i++) + { + float value; + + // Calculate intensity + value = i / (float) (original->size - 1); + // Apply gamma curve + value = powf(value, 1.f / gamma) * 65535.f + 0.5f; + // Clamp to value range + value = _glfw_fminf(value, 65535.f); + + values[i] = (unsigned short) value; + } + + ramp.red = values; + ramp.green = values; + ramp.blue = values; + ramp.size = original->size; + + glfwSetGammaRamp(handle, &ramp); + free(values); +} + +GLFWAPI const GLFWgammaramp* glfwGetGammaRamp(GLFWmonitor* handle) +{ + _GLFWmonitor* monitor = (_GLFWmonitor*) handle; + assert(monitor != NULL); + + _GLFW_REQUIRE_INIT_OR_RETURN(NULL); + + _glfwFreeGammaArrays(&monitor->currentRamp); + if (!_glfwPlatformGetGammaRamp(monitor, &monitor->currentRamp)) + return NULL; + + return &monitor->currentRamp; +} + +GLFWAPI void glfwSetGammaRamp(GLFWmonitor* handle, const GLFWgammaramp* ramp) +{ + _GLFWmonitor* monitor = (_GLFWmonitor*) handle; + assert(monitor != NULL); + assert(ramp != NULL); + assert(ramp->size > 0); + assert(ramp->red != NULL); + assert(ramp->green != NULL); + assert(ramp->blue != NULL); + + if (ramp->size <= 0) + { + _glfwInputError(GLFW_INVALID_VALUE, + "Invalid gamma ramp size %i", + ramp->size); + return; + } + + _GLFW_REQUIRE_INIT(); + + if (!monitor->originalRamp.size) + { + if (!_glfwPlatformGetGammaRamp(monitor, &monitor->originalRamp)) + return; + } + + _glfwPlatformSetGammaRamp(monitor, ramp); +} + |