203 lines
7.6 KiB
Lua
203 lines
7.6 KiB
Lua
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local nk = sg
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local stb = require("stb")
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local ffi = require("ffi")
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-- --------------------------------------------------------------------------------------
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local function checkstring(val)
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local t = type(val)
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if t == "string" then
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return val
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elseif t == "number" then
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return tostring(val)
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elseif t == "cdata" then
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return ffi.string(val)
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else
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error("bad argument: string or number expected, got " .. t, 2)
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end
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end
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-- --------------------------------------------------------------------------------------
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nuklear_renderer = {}
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-- --------------------------------------------------------------------------------------
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nuklear_renderer.get_size = function()
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local r = renderer.rect
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-- print("get_size", r.w, r.h)
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return r.w, r.h
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end
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-- --------------------------------------------------------------------------------------
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nuklear_renderer.set_clip_rect = function(x, y, w, h)
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local canvas = renderer.canvas
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local r = renderer.rect
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local rect = nk.nk_rect(x + r.x, y + r.y, w, h)
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-- print("set_clip_rect", rect.x, rect.y, rect.w, rect.h)
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nk.nk_push_scissor(canvas, rect)
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end
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-- --------------------------------------------------------------------------------------
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nuklear_renderer.draw_rect = function(x, y, w, h, color)
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local canvas = renderer.canvas
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local r = renderer.rect
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-- local ncol = nk.nk_rgba(color.r, color.g, color.b, color.a)
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local ncol = nk.nk_rgba(color[1], color[2], color[3], color[4])
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-- print("draw_rect", x, y, w, h)
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-- nk.nk_layout_space_begin(renderer.ctx, nk.NK_STATIC, r.w, 1)
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-- nk.nk_layout_space_push(renderer.ctx, r)
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nk.nk_fill_rect(canvas, nk.nk_rect( x+r.x, y+r.y, w, h), 0, ncol)
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-- nk.nk_layout_space_end(renderer.ctx)
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end
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-- --------------------------------------------------------------------------------------
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nuklear_renderer.draw_text = function(font, text, x, y, color)
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local canvas = renderer.canvas
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-- local hcolor = nk.nk_rgba(color.r, color.g, color.b, color.a)
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local hcolor = nk.nk_rgba(color[1], color[2], color[3], color[4])
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local r = renderer.rect
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local w = font:get_width(text)
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local h = font:get_height()
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local rect = nk.nk_rect(x+r.x, y+r.y, w, h)
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local font_handle = font.font.handle
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local text = checkstring(text)
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local text_len = #text
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-- print("draw_text", x, y, text)
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if(text == "CRLF" or #text == 0) then return x end
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if(string.byte(text, -1, -1) == 10) then text_len = text_len - 1 end
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-- nk.nk_layout_space_begin(renderer.ctx, nk.NK_STATIC, r.w, 1)
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-- nk.nk_layout_space_push(renderer.ctx, r)
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-- font:set_tab_width( font.tab_width )
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nk.nk_draw_text(canvas, rect, text, text_len, font_handle, hcolor, hcolor)
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-- nk.nk_layout_space_end(renderer.ctx)
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return w + x, h
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end
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-- --------------------------------------------------------------------------------------
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nuklear_renderer.load_image = function(filename, no_ui)
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local x = ffi.new("int[1]", {0})
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local y = ffi.new("int[1]", {0})
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local n = ffi.new("int[1]", {4})
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local data = stb.stbi_load(filename, x, y, n, 4)
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if (data == nil) then error("[STB]: failed to load image: "..filename); return nil end
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-- print("Original channels in file:", n[0])
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print("Image Loaded: "..filename.." Width: "..x[0].." Height: "..y[0].." Channels: "..n[0])
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-- Auto free when data handles are released
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ffi.gc(data, stb.stbi_image_free)
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local pixformat = sg.SG_PIXELFORMAT_RGBA8
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local sg_img_desc = ffi.new("sg_image_desc[1]", {})
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sg_img_desc[0].width = x[0]
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sg_img_desc[0].height = y[0]
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sg_img_desc[0].pixel_format = pixformat
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sg_img_desc[0].sample_count = 1
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sg_img_desc[0].data.subimage[0][0].ptr = data
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sg_img_desc[0].data.subimage[0][0].size = x[0] * y[0] * 4
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if(sg.sg_isvalid() == false) then return nil, sg_img_desc, data end
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local new_img = sg.sg_make_image(sg_img_desc)
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if(no_ui) then return new_img, sg_img_desc, data end
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-- // create a sokol-nuklear image object which associates an sg_image with an sg_sampler
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local img_desc = ffi.new("snk_image_desc_t[1]")
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img_desc[0].image = new_img
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local snk_img = nk.snk_make_image(img_desc)
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local nk_hnd = nk.snk_nkhandle(snk_img)
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local nk_img = nk.nk_image_handle(nk_hnd);
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return nk_img, sg_img_desc
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end
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-- --------------------------------------------------------------------------------------
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nuklear_renderer.load_image_buffer = function( name, buf, bufsize, no_ui )
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name = name or "image"
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local x = ffi.new("int[1]", {0})
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local y = ffi.new("int[1]", {0})
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local n = ffi.new("int[1]", {4})
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local data = stb.stbi_load_from_memory(buf, bufsize, x, y, n, 4)
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if (data == nil) then
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print("[STB]: failed to load image: ", name)
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return nil, nil
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end
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print("Original channels in file:", n[0])
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print("Image Buffer Loaded: "..name.." Width: "..x[0].." Height: "..y[0].." Channels: "..n[0])
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local pixformat = sg.SG_PIXELFORMAT_RGBA8
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local sg_img_desc = ffi.new("sg_image_desc[1]")
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sg_img_desc[0].width = x[0]
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sg_img_desc[0].height = y[0]
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sg_img_desc[0].pixel_format = pixformat
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sg_img_desc[0].sample_count = 1
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sg_img_desc[0].data.subimage[0][0].ptr = data
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sg_img_desc[0].data.subimage[0][0].size = x[0] * y[0] * 4
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if(sg.sg_isvalid() == false) then return nil, sg_img_desc, data end
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local new_img = sg.sg_make_image(sg_img_desc)
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if(no_ui) then return new_img, sg_img_desc, data end
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-- // create a sokol-nuklear image object which associates an sg_image with an sg_sampler
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local img_desc = ffi.new("snk_image_desc_t[1]")
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img_desc[0].image = new_img
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local snk_img = nk.snk_make_image(img_desc)
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local nk_hnd = nk.snk_nkhandle(snk_img)
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local nk_img = nk.nk_image_handle(nk_hnd);
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stb.stbi_image_free(data)
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return nk_img, sg_img_desc
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end
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-- --------------------------------------------------------------------------------------
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nuklear_renderer.draw_image = function(img, x, y, w, h, color)
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color = color or {0xff, 0xff, 0xff, 0xff}
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local canvas = renderer.canvas
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local r = renderer.rect
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local rect = nk.nk_rect(x+r.x, y+r.y, w, h)
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local icolor = nk.nk_rgba(color[1], color[2], color[3], color[4])
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nk.nk_draw_image(canvas, rect, img, icolor )
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end
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-- --------------------------------------------------------------------------------------
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nuklear_renderer.set_cursor = function()
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if(renderer.ctx == nil) then return end
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local cursor_name, rect = renderer.cursor.name, renderer.cursor.rect
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local r = nk.nk_rect(rect.position.x, rect.position.y, rect.size.x, rect.size.y)
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nk.nk_layout_space_begin(renderer.ctx, nk.NK_STATIC, 27, 1)
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nk.nk_layout_space_push(renderer.ctx, r)
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if (nk.nk_widget_is_hovered(renderer.ctx) == true) then
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if(cursor_name == "arrow") then
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nk.nk_style_set_cursor(renderer.ctx, nk.NK_CURSOR_ARROW)
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elseif(cursor_name == "ibeam") then
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nk.nk_style_set_cursor(renderer.ctx, nk.NK_CURSOR_TEXT)
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elseif(cursor_name == "hsplit") then
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nk.nk_style_set_cursor(renderer.ctx, nk.NK_CURSOR_RESIZE_HORIZONTAL)
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elseif(cursor_name == "sizeh") then
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nk.nk_style_set_cursor(renderer.ctx, nk.NK_CURSOR_RESIZE_HORIZONTAL)
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elseif(cursor_name == "sizev") then
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nk.nk_style_set_cursor(renderer.ctx, nk.NK_CURSOR_RESIZE_VERTICAL)
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end
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else
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nk.nk_style_set_cursor(renderer.ctx, nk.NK_CURSOR_ARROW);
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end
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nk.nk_layout_space_end(renderer.ctx)
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end
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-- --------------------------------------------------------------------------------------
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