Added sokol gp for 2D drawing.

ffi/sokol/sokol_gp.lua

@@ -0,0 +1,25 @@
+local ffi  = require( "ffi" )
+
+local sokol_filename = _G.SOKOL_GP_DLL or "sokol_gp_dll"
+local libs = ffi_sokol_gfx or {
+   OSX     = { x64 = sokol_filename..".so" },
+   Windows = { x64 = sokol_filename..".dll" },
+   Linux   = { x64 = sokol_filename..".so", arm = sokol_filename..".so" },
+   BSD     = { x64 = sokol_filename..".so" },
+   POSIX   = { x64 = sokol_filename..".so" },
+   Other   = { x64 = sokol_filename..".so" },
+}
+
+local lib  = ffi_sokol_gfx or libs[ ffi.os ][ ffi.arch ]
+local sokol_gfx   = ffi.load( lib )
+
+-- load lcpp (ffi.cdef wrapper turned on per default)
+local lcpp = require("tools.lcpp")
+
+-- just use LuaJIT ffi and lcpp together
+ffi.cdef([[
+#include <ffi/sokol-headers/sokol_gfx.h> 
+#include <ffi/sokol-headers/sokol_gp.h> 
+]])
+
+return sokol_gfx

projects/examples/samples/sapp-gp.lua

@@ -0,0 +1,102 @@
+
+package.path    = package.path..";../../?.lua"
+local dirtools  = require("tools.vfs.dirtools").init("sokol%-luajit")
+
+--_G.SOKOL_DLL    = "sokol_debug_dll"
+local sapp      = require("sokol_app")
+sgp             = require("sokol_gp")
+sg              = sgp
+local slib      = require("sokol_libs") -- Warn - always after gfx!!
+
+local hmm       = require("hmm")
+local hutils    = require("hmm_utils")
+
+local utils     = require("utils")
+
+local ffi       = require("ffi")
+
+-- --------------------------------------------------------------------------------------
+
+local function init()
+
+    local desc = ffi.new("sg_desc[1]")
+    desc[0].environment = slib.sglue_environment()
+    desc[0].logger.func = slib.slog_func
+    desc[0].disable_validation = false
+    sg.sg_setup( desc )
+    print("Sokol Is Valid: "..tostring(sg.sg_isvalid()))
+
+    -- Initialize Sokol GP, adjust the size of command buffers for your own use.
+    local sgpdesc = ffi.new("sgp_desc[1]")
+    ffi.fill(sgpdesc, ffi.sizeof("sgp_desc"))
+    sgp.sgp_setup(sgpdesc)
+    print("Sokol GP Is Valid: ".. tostring(sgp.sgp_is_valid()))
+end
+
+-- --------------------------------------------------------------------------------------
+
+local function frame()
+
+    -- Get current window size.
+    local width         = sapp.sapp_widthf()
+    local height        = sapp.sapp_heightf()
+    local t             = (sapp.sapp_frame_duration() * 60.0)
+    local ratio = width/height
+
+    -- Begin recording draw commands for a frame buffer of size (width, height).
+    sgp.sgp_begin(width, height)
+    -- Set frame buffer drawing region to (0,0,width,height).
+    sgp.sgp_viewport(0, 0, width, height)
+    -- Set drawing coordinate space to (left=-ratio, right=ratio, top=1, bottom=-1).
+    sgp.sgp_project(-ratio, ratio, 1.0, -1.0)
+
+    -- Clear the frame buffer.
+    sgp.sgp_set_color(0.1, 0.1, 0.1, 1.0)
+    sgp.sgp_clear()
+
+    -- Draw an animated rectangle that rotates and changes its colors.
+    local time = tonumber(sapp.sapp_frame_count() * sapp.sapp_frame_duration())
+    local r = math.sin(time)*0.5+0.5
+    local g = math.cos(time)*0.5+0.5
+    sgp.sgp_set_color(r, g, 0.3, 1.0)
+    sgp.sgp_rotate_at(time, 0.0, 0.0)
+    sgp.sgp_draw_filled_rect(-0.5, -0.5, 1.0, 1.0)
+
+    -- Begin a render pass.
+    local pass      = ffi.new("sg_pass[1]")
+    pass[0].swapchain = slib.sglue_swapchain()
+    sg.sg_begin_pass(pass)
+
+    -- Dispatch all draw commands to Sokol GFX.
+    sgp.sgp_flush()
+    -- Finish a draw command queue, clearing it.
+    sgp.sgp_end()
+    -- End render pass.
+    sgp.sg_end_pass()
+    -- Commit Sokol render.
+    sg.sg_commit()
+end
+
+-- --------------------------------------------------------------------------------------
+
+local function cleanup()
+    sgp.sgp_shutdown()
+    sg.sg_shutdown()
+end
+
+-- --------------------------------------------------------------------------------------
+
+local app_desc = ffi.new("sapp_desc[1]")
+app_desc[0].init_cb     = init
+app_desc[0].frame_cb    = frame
+app_desc[0].cleanup_cb  = cleanup
+app_desc[0].width       = 1920
+app_desc[0].height      = 1080
+app_desc[0].window_title = "Rectangle (Sokol GP)"
+app_desc[0].fullscreen  = false
+app_desc[0].icon.sokol_default = true 
+app_desc[0].logger.func = slib.slog_func 
+
+sapp.sapp_run( app_desc )
+
+-- --------------------------------------------------------------------------------------