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path: root/src/lua/modules/graphics/luaopen_graphics.cpp
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Diffstat (limited to 'src/lua/modules/graphics/luaopen_graphics.cpp')
-rw-r--r--src/lua/modules/graphics/luaopen_graphics.cpp493
1 files changed, 493 insertions, 0 deletions
diff --git a/src/lua/modules/graphics/luaopen_graphics.cpp b/src/lua/modules/graphics/luaopen_graphics.cpp
new file mode 100644
index 0000000..f0a7f5b
--- /dev/null
+++ b/src/lua/modules/graphics/luaopen_graphics.cpp
@@ -0,0 +1,493 @@
+#include "lua/modules/luax.h"
+#include "libjin/jin.h"
+#include "lua/common/common.h"
+#include "lua/modules/embed/graphics.lua.h"
+
+namespace jin
+{
+namespace lua
+{
+ using namespace jin::graphics;
+ using jin::filesystem::Filesystem;
+ using jin::filesystem::Buffer;
+
+ typedef Texture Image;
+
+ static struct
+ {
+ color curRenderColor;
+ Font* curFont = nullptr;
+ Font* defaultFont = nullptr;
+ } context;
+
+ static int l_init(lua_State* L)
+ {
+ Window* wnd = Window::get();
+ Window::Setting setting;
+ setting.width = luax_getfield_integer(L, 1, "width");
+ setting.height = luax_getfield_integer(L, 1, "height");
+ setting.title = luax_getfield_string(L, 1, "title");
+ setting.vsync = luax_getfield_bool(L, 1, "vsync");
+ setting.fullscreen = luax_getfield_bool(L, 1, "fullscreen");
+ setting.resizable= luax_getfield_bool(L, 1, "resizable");
+ if (!wnd->init(&setting))
+ {
+ luax_pushboolean(L, false);
+ return 1;
+ }
+ luax_pushboolean(L, true);
+ return 1;
+ }
+
+ static int l_destroy(lua_State* L)
+ {
+ Window* wnd = Window::get();
+ wnd->quit();
+ return 0;
+ }
+
+ static int l_getSize(lua_State* L)
+ {
+ Window* wnd = Window::get();
+ luax_pushnumber(L, wnd->getW());
+ luax_pushnumber(L, wnd->getH());
+ return 2;
+ }
+
+ static int l_getWidth(lua_State* L)
+ {
+ Window* wnd = Window::get();
+ luax_pushnumber(L, wnd->getW());
+ return 1;
+ }
+
+ static int l_getHeight(lua_State* L)
+ {
+ Window* wnd = Window::get();
+ luax_pushnumber(L, wnd->getH());
+ return 1;
+ }
+
+ static int l_newImage(lua_State* L)
+ {
+ Filesystem* fs = Filesystem::get();
+ const char* f = luax_checkstring(L, 1);
+ if (!fs->exists(f))
+ {
+ printf("Error: no such image %s\n", f);
+ exit(1);
+ }
+ Buffer b;
+ fs->read(f, &b);
+
+ Proxy* proxy = (Proxy*)luax_newinstance(L, JIN_GRAPHICS_IMAGE, sizeof(Proxy));
+ Image* img = Image::createTexture(b.data, b.size);
+ proxy->bind(new Ref<Image>(img, JIN_GRAPHICS_IMAGE));
+ return 1;
+ }
+
+ static int l_newShader(lua_State* L)
+ {
+ Proxy* proxy = (Proxy*)luax_newinstance(L, JIN_GRAPHICS_SHADER, sizeof(Proxy));
+ const char* program = luax_checkstring(L, 1);
+ JSLProgram* jsl = JSLProgram::createJSLProgram(program);
+ proxy->bind(new Ref<JSLProgram>(jsl, JIN_GRAPHICS_SHADER));
+ return 1;
+ }
+
+ static int l_newCanvas(lua_State* L)
+ {
+ int w = luax_checknumber(L, 1);
+ int h = luax_checknumber(L, 2);
+ Proxy* proxy = (Proxy*)luax_newinstance(L, JIN_GRAPHICS_CANVAS, sizeof(Proxy));
+ Canvas* cvs = Canvas::createCanvas(w, h);
+ proxy->bind(new Ref<Canvas>(cvs, JIN_GRAPHICS_CANVAS));
+ return 1;
+ }
+
+ static int l_clear(lua_State* L)
+ {
+ if (luax_gettop(L) == 0)
+ {
+ glClearColor(0, 0, 0, 1);
+ }
+ else
+ {
+ int r = luax_checknumber(L, 1);
+ int g = luax_checknumber(L, 2);
+ int b = luax_checknumber(L, 3);
+ int a = luax_checknumber(L, 4);
+ glClearColor(r / 255.f, g / 255.f, b / 255.f, a / 255.f);
+ }
+ glClear(GL_COLOR_BUFFER_BIT);
+ return 0;
+ }
+
+ static int l_present(lua_State* L)
+ {
+ Window::get()->swapBuffers();
+ return 0;
+ }
+
+ static int l_draw(lua_State* L)
+ {
+ int x = luax_optnumber(L, 2, 0);
+ int y = luax_optnumber(L, 3, 0);
+ float sx = luax_optnumber(L, 4, 1);
+ float sy = luax_optnumber(L, 5, 1);
+ float r = luax_optnumber(L, 6, 0);
+ if (luax_istype(L, 1, JIN_GRAPHICS_IMAGE))
+ {
+ Proxy* proxy = (Proxy*)luax_toudata(L, 1);
+ Ref<Image>& tex = proxy->getRef<Image>();
+ tex->draw(x, y, sx, sy, r);
+ }
+ else if (luax_istype(L, 1, JIN_GRAPHICS_CANVAS))
+ {
+ Proxy* proxy = (Proxy*)luax_toudata(L, 1);
+ Ref<Canvas>& p = proxy->getRef<Canvas>();
+ p->draw(x, y, sx, sy, r);
+ }
+ else
+ {
+ /* wrong type */
+ luax_typerror(L, 1, "image or canvas");
+ }
+ return 0;
+ }
+
+ static int l_setColor(lua_State* L)
+ {
+ if (luax_gettop(L) == 0)
+ {
+ glColor4f(1, 1, 1, 1);
+ return 0;
+ }
+
+ context.curRenderColor.rgba.r = luax_checknumber(L, 1);
+ context.curRenderColor.rgba.g = luax_checknumber(L, 2);
+ context.curRenderColor.rgba.b = luax_checknumber(L, 3);
+ context.curRenderColor.rgba.a = luax_checknumber(L, 4);
+
+ glColor4f(context.curRenderColor.rgba.r / 255.f,
+ context.curRenderColor.rgba.g / 255.f,
+ context.curRenderColor.rgba.b / 255.f,
+ context.curRenderColor.rgba.a / 255.f);
+ return 0;
+ }
+
+ static int l_getColor(lua_State * L)
+ {
+ luax_pushnumber(L, context.curRenderColor.rgba.r);
+ luax_pushnumber(L, context.curRenderColor.rgba.g);
+ luax_pushnumber(L, context.curRenderColor.rgba.b);
+ luax_pushnumber(L, context.curRenderColor.rgba.a);
+ return 4;
+ }
+
+ static int l_bindCanvas(lua_State* L)
+ {
+ if (luax_gettop(L) == 0)
+ {
+ // bind to default canvas
+ Canvas::unbind();
+ return 0;
+ }
+ Proxy* proxy = (Proxy*)luax_checktype(L, 1, JIN_GRAPHICS_CANVAS);
+ Ref<Canvas>& ref = proxy->getRef<Canvas>();
+ ref->bind();
+ return 0;
+ }
+
+ static int l_unbindCanvas(lua_State* L)
+ {
+ Canvas::unbind();
+ return 0;
+ }
+
+ static int l_useShader(lua_State* L)
+ {
+ if (luax_gettop(L) == 0)
+ {
+ JSLProgram::unuse();
+ return 0;
+ }
+ if (luax_istype(L, 1, JIN_GRAPHICS_SHADER))
+ {
+ Proxy* proxy = (Proxy*)luax_toudata(L, 1);
+ Ref<JSLProgram>& jsl = proxy->getRef<JSLProgram>();
+ jsl->use();
+ }
+ else
+ {
+ luax_typerror(L, 1, "JSL shader");
+ }
+ return 0;
+ }
+
+ static int l_unuseShader(lua_State* L)
+ {
+ JSLProgram::unuse();
+ return 0;
+ }
+
+ static int l_setBlend(lua_State* L)
+ {
+
+ return 0;
+ }
+
+ static RENDER_MODE strtomode(const char* str)
+ {
+ std::string s = std::string(str);
+ if (s == "fill") return RENDER_MODE::FILL;
+ else if (s == "line") return RENDER_MODE::LINE;
+ else return RENDER_MODE::NONE;
+ }
+
+ static int l_drawpoint(lua_State* L)
+ {
+ int x = luax_checknumber(L, 1);
+ int y = luax_checknumber(L, 2);
+ jin::graphics::point(x, y);
+
+ return 0;
+ }
+
+ static int l_drawLine(lua_State* L)
+ {
+ int x1 = luax_checknumber(L, 1);
+ int y1 = luax_checknumber(L, 2);
+ int x2 = luax_checknumber(L, 3);
+ int y2 = luax_checknumber(L, 4);
+ jin::graphics::line(x1, y1, x2, y2);
+
+ return 0;
+ }
+
+ static int l_drawRect(lua_State* L)
+ {
+ const char* modestr = luax_checkstring(L, 1);
+ RENDER_MODE mode = strtomode(modestr);
+ if (mode != RENDER_MODE::NONE)
+ {
+ int x = luax_checknumber(L, 2);
+ int y = luax_checknumber(L, 3);
+ int w = luax_checknumber(L, 4);
+ int h = luax_checknumber(L, 5);
+ rect(mode, x, y, w, h);
+ }
+ else
+ {
+ luax_typerror(L, 1, "'fill' or 'line'");
+ return 1;
+ }
+
+ return 0;
+ }
+
+ static int l_drawCircle(lua_State* L)
+ {
+ const char* modestr = luax_checkstring(L, 1);
+ RENDER_MODE mode = strtomode(modestr);
+ if (mode != RENDER_MODE::NONE)
+ {
+ int x = luax_checknumber(L, 2);
+ int y = luax_checknumber(L, 3);
+ float r = luax_checknumber(L, 4);
+ circle(mode, x, y, r);
+ }
+ else
+ {
+ luax_typerror(L, 1, "'fill' or 'line'");
+ return 1;
+ }
+
+ return 0;
+ }
+
+ static int l_drawTriangle(lua_State* L)
+ {
+ const char* modestr = luax_checkstring(L, 1);
+ RENDER_MODE mode = strtomode(modestr);
+ if (mode != RENDER_MODE::NONE)
+ {
+ int x = luax_checknumber(L, 2);
+ int y = luax_checknumber(L, 3);
+
+ int x2 = luax_checknumber(L, 3);
+ int y2 = luax_checknumber(L, 4);
+
+ int x3 = luax_checknumber(L, 5);
+ int y3 = luax_checknumber(L, 6);
+
+ triangle(mode, x, y, x2, y2, x3, y3);
+ }
+ else
+ {
+ luax_typerror(L, 1, "'fill' or 'line'");
+ return 1;
+ }
+
+ return 0;
+ }
+
+ static int l_drawPolygon(lua_State* L)
+ {
+ const char* modestr = luax_checkstring(L, 1);
+ int n = luax_checknumber(L, 2);
+ RENDER_MODE mode = strtomode(modestr);
+ if (mode != RENDER_MODE::NONE)
+ {
+ if (!luax_istable(L, 3))
+ {
+ luax_typerror(L, 3, "table");
+ return 1;
+ }
+ int tn = luax_tableidxlen(L, 3);
+ if (tn != n * 2)
+ {
+ static char* emsg = \
+ "number of polygon vertices doesn't match " \
+ "provided n, expect %d numbers but get %d";
+ luax_error(L, emsg, n * 2, tn);
+ return 1;
+ }
+ float* p = new float[2 * n];
+ for (int i = 1; i <= 2 * n; ++i)
+ p[i - 1] = luax_rawgetnumber(L, 3, i);
+ polygon(mode, p, n);
+ delete[] p;
+ }
+ else
+ {
+ luax_typerror(L, 1, "'fill' or 'line'");
+ return 1;
+ }
+
+ return 0;
+ }
+
+ static int l_newFont(lua_State* L)
+ {
+ Proxy* proxy = (Proxy*)luax_newinstance(L, JIN_GRAPHICS_FONT, sizeof(Proxy));
+ Font* font = new Font();
+ {
+ const char* path = luax_checkstring(L, 1);
+ Filesystem* fs = Filesystem::get();
+ Buffer b = {};
+ if (!fs->exists(path))
+ {
+ printf("Error: no such font %s\n", path);
+ exit(1);
+ }
+ fs->read(path, &b);
+ font->loadb((const unsigned char*)b.data);
+ }
+ proxy->bind(new Ref<Font>(font, JIN_GRAPHICS_FONT));
+ return 1;
+ }
+
+ static int l_study(lua_State* L)
+ {
+ int n = luax_gettop(L);
+ if (n == 0)
+ {
+ if (context.defaultFont == 0)
+ {
+ #include "lua/resources/font.ttf.h"
+ // load default font
+ context.defaultFont = new Font();
+ context.defaultFont->loadb(font_ttf);
+ }
+ context.curFont = context.defaultFont;
+ return 0;
+ }
+ Font* font = (Font*)luax_checktype(L, 1, JIN_GRAPHICS_FONT);
+ context.curFont = font;
+ return 0;
+ }
+
+ static int l_write(lua_State* L)
+ {
+ if (context.curFont == 0)
+ return 0;
+
+ const char* text = luax_checkstring(L, 1);
+ int x = luax_checknumber(L, 2);
+ int y = luax_checknumber(L, 3);
+
+ int fh = luax_optnumber(L, 4, 15);
+ int spacing = luax_optnumber(L, 5, 1);
+ int lh = luax_optnumber(L, 6, 18);
+
+ context.curFont->render(text, x, y, fh, spacing, lh);
+
+ return 0;
+ }
+
+ static int l_box(lua_State* L)
+ {
+ const char* text = luax_checkstring(L, 1);
+ int fontheight = luax_checknumber(L, 2);
+ int spacing = luax_checknumber(L, 3);
+ int lineheight = luax_checknumber(L, 4);
+ int w, h;
+ context.curFont->box(text, fontheight, spacing, lineheight, &w, &h);
+ luax_pushnumber(L, w);
+ luax_pushnumber(L, h);
+ return 2;
+ }
+
+ static const luaL_Reg f[] = {
+ { "init", l_init },
+ { "size", l_getSize },
+ { "getWidth", l_getWidth },
+ { "getHeight", l_getHeight },
+ { "newImage", l_newImage },
+ { "newShader", l_newShader },
+ { "newCanvas", l_newCanvas },
+ { "newFont", l_newFont },
+ { "box", l_box },
+ { "write", l_write },
+ { "clear", l_clear },
+ { "draw", l_draw },
+ { "color", l_setColor },
+ { "palette", l_getColor },
+ { "present", l_present },
+ { "study", l_study },
+ { "bind", l_bindCanvas },
+ { "unbind", l_unbindCanvas },
+ { "use", l_useShader },
+ { "unuse", l_unuseShader },
+ { "point", l_drawpoint },
+ { "line", l_drawLine },
+ { "rect", l_drawRect },
+ { "circle", l_drawCircle },
+ { "triangle", l_drawTriangle },
+ { "polygon", l_drawPolygon },
+ { "destroy", l_destroy },
+ { 0, 0 }
+ };
+
+ extern int luaopen_Image(lua_State* L);
+ extern int luaopen_Font(lua_State* L);
+ extern int luaopen_Canvas(lua_State* L);
+ extern int luaopen_JSL(lua_State* L);
+
+ int luaopen_graphics(lua_State* L)
+ {
+ // register types
+ luaopen_Image(L);
+ luaopen_Canvas(L);
+ luaopen_Font(L);
+ luaopen_JSL(L);
+
+ // load whole lib
+ luax_newlib(L, f);
+
+ return 1;
+ }
+
+}// lua
+}// jin \ No newline at end of file
generated by cgit v1.1-26-g67d0 at 2025-05-21 04:45:29 +0000