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887b4a7a1a
Let GButton have an optional icon (GraphicsBitmap) that gets rendered in the middle of the button if present. Also add GraphicsBitmap::load_from_file() which allows mmap'ed RGBA32 files. I wrote a little program to take "raw" files from GIMP and swizzle them into the correct byte order.
114 lines
3.3 KiB
C++
114 lines
3.3 KiB
C++
#include "GraphicsBitmap.h"
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#ifdef KERNEL
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#include <Kernel/Process.h>
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#include <Kernel/MemoryManager.h>
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#include <WindowServer/WSMessageLoop.h>
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#endif
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#ifdef USERLAND
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#include <sys/mman.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdio.h>
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#endif
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#ifdef KERNEL
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RetainPtr<GraphicsBitmap> GraphicsBitmap::create(Process& process, const Size& size)
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{
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return adopt(*new GraphicsBitmap(process, size));
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}
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GraphicsBitmap::GraphicsBitmap(Process& process, const Size& size)
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: m_size(size)
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, m_pitch(size.width() * sizeof(RGBA32))
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, m_client_process(process.make_weak_ptr())
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{
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InterruptDisabler disabler;
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size_t size_in_bytes = size.width() * size.height() * sizeof(RGBA32);
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auto vmo = VMObject::create_anonymous(size_in_bytes);
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m_client_region = process.allocate_region_with_vmo(LinearAddress(), size_in_bytes, vmo.copy_ref(), 0, "GraphicsBitmap (client)", true, true);
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m_client_region->set_shared(true);
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m_client_region->set_is_bitmap(true);
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m_client_region->commit();
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auto& server = WSMessageLoop::the().server_process();
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m_server_region = server.allocate_region_with_vmo(LinearAddress(), size_in_bytes, move(vmo), 0, "GraphicsBitmap (server)", true, false);
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m_server_region->set_shared(true);
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m_server_region->set_is_bitmap(true);
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m_data = (RGBA32*)m_server_region->laddr().as_ptr();
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}
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#endif
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RetainPtr<GraphicsBitmap> GraphicsBitmap::create_wrapper(const Size& size, RGBA32* data)
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{
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return adopt(*new GraphicsBitmap(size, data));
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}
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RetainPtr<GraphicsBitmap> GraphicsBitmap::load_from_file(const String& path, const Size& size)
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{
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#ifdef USERLAND
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int fd = open(path.characters(), O_RDONLY, 0644);
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if (fd < 0) {
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dbgprintf("open(%s) got fd=%d, failed: %s\n", path.characters(), fd, strerror(errno));
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perror("open");
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return nullptr;
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}
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auto* mapped_file = (RGBA32*)mmap(nullptr, size.area() * 4, PROT_READ, MAP_SHARED, fd, 0);
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if (mapped_file == MAP_FAILED) {
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int rc = close(fd);
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ASSERT(rc == 0);
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return nullptr;
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}
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#else
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int error;
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auto descriptor = VFS::the().open(path, error, 0, 0, *VFS::the().root_inode());
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if (!descriptor) {
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kprintf("Failed to load GraphicsBitmap from file (%s)\n", path.characters());
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ASSERT_NOT_REACHED();
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}
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auto* region = current->allocate_file_backed_region(LinearAddress(), size.area() * 4, descriptor->inode(), ".rgb file", /*readable*/true, /*writable*/false);
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region->page_in();
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auto* mapped_file = (RGBA32*)region->laddr().get();
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#endif
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#ifdef USERLAND
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int rc = close(fd);
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ASSERT(rc == 0);
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#endif
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auto bitmap = create_wrapper(size, mapped_file);
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#ifdef KERNEL
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bitmap->m_server_region = region;
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#else
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bitmap->m_mmaped = true;
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#endif
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return bitmap;
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}
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GraphicsBitmap::GraphicsBitmap(const Size& size, RGBA32* data)
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: m_size(size)
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, m_data(data)
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, m_pitch(size.width() * sizeof(RGBA32))
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{
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}
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GraphicsBitmap::~GraphicsBitmap()
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{
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#ifdef KERNEL
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if (m_client_region && m_client_process)
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m_client_process->deallocate_region(*m_client_region);
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if (m_server_region)
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WSMessageLoop::the().server_process().deallocate_region(*m_server_region);
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#else
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if (m_mmaped) {
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int rc = munmap(m_data, m_size.area() * 4);
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ASSERT(rc == 0);
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}
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#endif
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m_data = nullptr;
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}
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