107 lines
No EOL
4 KiB
C++
107 lines
No EOL
4 KiB
C++
/*
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Crafter®.Graphics
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Copyright (C) 2025 Catcrafts®
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catcrafts.net
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License version 3.0 as published by the Free Software Foundation;
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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module;
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#include <wayland-client.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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module Crafter.Graphics:WindowFramebuffer_wayland_impl;
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import :WindowFramebuffer;
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import :Window;
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import :UiElement;
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import std;
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import :Types;
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import :Shm;
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import Crafter.Event;
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namespace Crafter {
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void WindowFramebuffer::Create(std::uint_fast32_t width, std::uint_fast32_t height) {
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this->width = width;
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this->height = height;
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int stride = width * 4;
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int size = stride * height;
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int fd = create_shm_file(size);
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if (fd < 0) {
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fprintf(stderr, "creating a buffer file for %d B failed: %m\n", size);
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}
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framebuffer = reinterpret_cast<Pixel_BU8_GU8_RU8_AU8*>(mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0));
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if (framebuffer == MAP_FAILED) {
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fprintf(stderr, "mmap failed: %m\n");
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close(fd);
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}
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wl_shm_pool *pool = wl_shm_create_pool(window.shm, fd, size);
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buffer = wl_shm_pool_create_buffer(pool, 0, width, height, stride, WL_SHM_FORMAT_ARGB8888);
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wl_shm_pool_destroy(pool);
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close(fd);
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if (buffer == NULL) {
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exit(EXIT_FAILURE);
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}
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wl_surface_attach(window.surface, buffer, 0, 0);
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wl_surface_commit(window.surface);
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}
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void WindowFramebuffer::Resize(std::uint_fast32_t width, std::uint_fast32_t height) {
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}
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void WindowFramebuffer::Destroy() {
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wl_buffer_destroy(buffer);
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}
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void WindowFramebuffer::Render() {
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std::vector<const UiElementBuffer*> drawOrder;
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drawOrder.reserve(elements.size());
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for (const UiElementBuffer* e : elements) drawOrder.push_back(e);
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std::sort(drawOrder.begin(), drawOrder.end(), [](const UiElementBuffer* a, const UiElementBuffer* b){ return a->parent.z < b->parent.z; });
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for(const UiElementBuffer* element : drawOrder) {
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ScaleData data = ScaleElement(element->parent);
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std::vector<Pixel_BU8_GU8_RU8_AU8> scaled(data.width*data.height);
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element->DrawNearestNeighbour(scaled.data(), data.width, data.height);
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for (std::int32_t x = data.x; x - data.x < data.width; x++) {
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for (std::int32_t y = data.y; y - data.y < data.height; y++) {
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if (x >= 0 && x < width && y >= 0 && y < height) {
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Pixel_BU8_GU8_RU8_AU8& dst = framebuffer[y * width + x];
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const Pixel_BU8_GU8_RU8_AU8& src = scaled[(y - data.y) * data.width + (x - data.x)];
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float srcA = src.a / 255.0f;
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float dstA = dst.a / 255.0f;
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float outA = srcA + dstA * (1.0f - srcA);
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if (outA > 0.0f) {
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dst.r = static_cast<uint8_t>((src.r * srcA + dst.r * dstA * (1.0f - srcA)) / outA);
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dst.g = static_cast<uint8_t>((src.g * srcA + dst.g * dstA * (1.0f - srcA)) / outA);
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dst.b = static_cast<uint8_t>((src.b * srcA + dst.b * dstA * (1.0f - srcA)) / outA);
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dst.a = static_cast<uint8_t>(outA * 255);
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}
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}
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}
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}
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//RenderElements(window, *element, data);
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}
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}
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} |