// Copyright 2014 The Flutter Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "my_texture.h" // An object that generates a texture for Flutter. struct _MyTexture { FlPixelBufferTexture parent_instance; // Dimensions of texture. uint32_t width; uint32_t height; // Buffer used to store texture. uint8_t* buffer; }; G_DEFINE_TYPE(MyTexture, my_texture, fl_pixel_buffer_texture_get_type()) // Implements GObject::dispose. static void my_texture_dispose(GObject* object) { MyTexture* self = MY_TEXTURE(object); free(self->buffer); G_OBJECT_CLASS(my_texture_parent_class)->dispose(object); } // Implements FlPixelBufferTexture::copy_pixels. static gboolean my_texture_copy_pixels(FlPixelBufferTexture* texture, const uint8_t** out_buffer, uint32_t* width, uint32_t* height, GError** error) { MyTexture* self = MY_TEXTURE(texture); *out_buffer = self->buffer; *width = self->width; *height = self->height; return TRUE; } static void my_texture_class_init(MyTextureClass* klass) { G_OBJECT_CLASS(klass)->dispose = my_texture_dispose; FL_PIXEL_BUFFER_TEXTURE_CLASS(klass)->copy_pixels = my_texture_copy_pixels; } static void my_texture_init(MyTexture* self) {} MyTexture* my_texture_new(uint32_t width, uint32_t height, uint8_t r, uint8_t g, uint8_t b) { MyTexture* self = MY_TEXTURE(g_object_new(my_texture_get_type(), nullptr)); self->width = width; self->height = height; self->buffer = static_cast<uint8_t*>(malloc(self->width * self->height * 4)); my_texture_set_color(self, r, g, b); return self; } // Draws the texture with the requested color. void my_texture_set_color(MyTexture* self, uint8_t r, uint8_t g, uint8_t b) { g_return_if_fail(MY_IS_TEXTURE(self)); for (size_t y = 0; y < self->height; y++) { for (size_t x = 0; x < self->width; x++) { uint8_t* pixel = self->buffer + (y * self->width * 4) + (x * 4); pixel[0] = r; pixel[1] = g; pixel[2] = b; pixel[3] = 255; } } }