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Add glfwSetWindowIcon

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Adds support for setting window icons programmatically on platforms
where this makes sense.

Fixes #453.
Closes #467.
This commit is contained in:
Camilla Berglund
2016-03-07 14:55:30 +01:00
parent 793eef1d0a
commit b823f7151e
14 changed files with 299 additions and 55 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/win32_window.c
+145 -55
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@@ -27,6 +27,7 @@
#include "internal.h"
#include <limits.h>
#include <stdlib.h>
#include <malloc.h>
#include <string.h>
@@ -66,6 +67,112 @@ static DWORD getWindowExStyle(const _GLFWwindow* window)
return style;
}
// Returns the image whose area most closely matches the desired one
//
static const GLFWimage* chooseImage(int count, const GLFWimage* images,
int width, int height)
{
int i, leastDiff = INT_MAX;
const GLFWimage* closest = NULL;
for (i = 0; i < count; i++)
{
const int currDiff = abs(images[i].width * images[i].height -
width * height);
if (currDiff < leastDiff)
{
closest = images + i;
leastDiff = currDiff;
}
}
return closest;
}
// Creates an RGBA icon or cursor
//
static HICON createIcon(const GLFWimage* image,
int xhot, int yhot, GLFWbool icon)
{
int i;
HDC dc;
HICON handle;
HBITMAP color, mask;
BITMAPV5HEADER bi;
ICONINFO ii;
unsigned char* target = NULL;
unsigned char* source = image->pixels;
ZeroMemory(&bi, sizeof(bi));
bi.bV5Size = sizeof(BITMAPV5HEADER);
bi.bV5Width = image->width;
bi.bV5Height = -image->height;
bi.bV5Planes = 1;
bi.bV5BitCount = 32;
bi.bV5Compression = BI_BITFIELDS;
bi.bV5RedMask = 0x00ff0000;
bi.bV5GreenMask = 0x0000ff00;
bi.bV5BlueMask = 0x000000ff;
bi.bV5AlphaMask = 0xff000000;
dc = GetDC(NULL);
color = CreateDIBSection(dc,
(BITMAPINFO*) &bi,
DIB_RGB_COLORS,
(void**) &target,
NULL,
(DWORD) 0);
ReleaseDC(NULL, dc);
if (!color)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Win32: Failed to create RGBA bitmap");
return NULL;
}
mask = CreateBitmap(image->width, image->height, 1, 1, NULL);
if (!mask)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"Win32: Failed to create mask bitmap");
DeleteObject(color);
return NULL;
}
for (i = 0; i < image->width * image->height; i++)
{
target[0] = source[2];
target[1] = source[1];
target[2] = source[0];
target[3] = source[3];
target += 4;
source += 4;
}
ZeroMemory(&ii, sizeof(ii));
ii.fIcon = icon;
ii.xHotspot = xhot;
ii.yHotspot = yhot;
ii.hbmMask = mask;
ii.hbmColor = color;
handle = CreateIconIndirect(&ii);
DeleteObject(color);
DeleteObject(mask);
if (!handle)
{
if (icon)
_glfwInputError(GLFW_PLATFORM_ERROR, "Win32: Failed to create icon");
else
_glfwInputError(GLFW_PLATFORM_ERROR, "Win32: Failed to create cursor");
}
return handle;
}
// Translate client window size to full window size according to styles
//
static void getFullWindowSize(DWORD style, DWORD exStyle,
@@ -886,6 +993,12 @@ void _glfwPlatformDestroyWindow(_GLFWwindow* window)
}
destroyWindow(window);
if (window->win32.bigIcon)
DestroyIcon(window->win32.bigIcon);
if (window->win32.smallIcon)
DestroyIcon(window->win32.smallIcon);
}
void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
@@ -902,6 +1015,37 @@ void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
free(wideTitle);
}
void _glfwPlatformSetWindowIcon(_GLFWwindow* window,
int count, const GLFWimage* images)
{
HICON bigIcon = NULL, smallIcon = NULL;
if (count)
{
const GLFWimage* bigImage = chooseImage(count, images,
GetSystemMetrics(SM_CXICON),
GetSystemMetrics(SM_CYICON));
const GLFWimage* smallImage = chooseImage(count, images,
GetSystemMetrics(SM_CXSMICON),
GetSystemMetrics(SM_CYSMICON));
bigIcon = createIcon(bigImage, 0, 0, GLFW_TRUE);
smallIcon = createIcon(smallImage, 0, 0, GLFW_TRUE);
}
SendMessage(window->win32.handle, WM_SETICON, ICON_BIG, (LPARAM) bigIcon);
SendMessage(window->win32.handle, WM_SETICON, ICON_SMALL, (LPARAM) smallIcon);
if (window->win32.bigIcon)
DestroyIcon(window->win32.bigIcon);
if (window->win32.smallIcon)
DestroyIcon(window->win32.smallIcon);
window->win32.bigIcon = bigIcon;
window->win32.smallIcon = smallIcon;
}
void _glfwPlatformGetWindowPos(_GLFWwindow* window, int* xpos, int* ypos)
{
POINT pos = { 0, 0 };
@@ -1236,61 +1380,7 @@ int _glfwPlatformCreateCursor(_GLFWcursor* cursor,
const GLFWimage* image,
int xhot, int yhot)
{
HDC dc;
HBITMAP bitmap, mask;
BITMAPV5HEADER bi;
ICONINFO ii;
DWORD* target = 0;
BYTE* source = (BYTE*) image->pixels;
int i;
ZeroMemory(&bi, sizeof(bi));
bi.bV5Size = sizeof(BITMAPV5HEADER);
bi.bV5Width = image->width;
bi.bV5Height = -image->height;
bi.bV5Planes = 1;
bi.bV5BitCount = 32;
bi.bV5Compression = BI_BITFIELDS;
bi.bV5RedMask = 0x00ff0000;
bi.bV5GreenMask = 0x0000ff00;
bi.bV5BlueMask = 0x000000ff;
bi.bV5AlphaMask = 0xff000000;
dc = GetDC(NULL);
bitmap = CreateDIBSection(dc, (BITMAPINFO*) &bi, DIB_RGB_COLORS,
(void**) &target, NULL, (DWORD) 0);
ReleaseDC(NULL, dc);
if (!bitmap)
return GLFW_FALSE;
mask = CreateBitmap(image->width, image->height, 1, 1, NULL);
if (!mask)
{
DeleteObject(bitmap);
return GLFW_FALSE;
}
for (i = 0; i < image->width * image->height; i++, target++, source += 4)
{
*target = (source[3] << 24) |
(source[0] << 16) |
(source[1] << 8) |
source[2];
}
ZeroMemory(&ii, sizeof(ii));
ii.fIcon = FALSE;
ii.xHotspot = xhot;
ii.yHotspot = yhot;
ii.hbmMask = mask;
ii.hbmColor = bitmap;
cursor->win32.handle = (HCURSOR) CreateIconIndirect(&ii);
DeleteObject(bitmap);
DeleteObject(mask);
cursor->win32.handle = (HCURSOR) createIcon(image, xhot, yhot, GLFW_FALSE);
if (!cursor->win32.handle)
return GLFW_FALSE;