diff options
Diffstat (limited to 'ui')
-rw-r--r-- | ui/Makefile.objs | 13 | ||||
-rw-r--r-- | ui/console-gl.c | 168 | ||||
-rw-r--r-- | ui/sdl.c | 10 | ||||
-rw-r--r-- | ui/sdl2-2d.c | 28 | ||||
-rw-r--r-- | ui/sdl2-gl.c | 112 | ||||
-rw-r--r-- | ui/sdl2-input.c | 6 | ||||
-rw-r--r-- | ui/sdl2.c | 71 | ||||
-rw-r--r-- | ui/shader.c | 114 | ||||
-rw-r--r-- | ui/shader/texture-blit.frag | 10 | ||||
-rw-r--r-- | ui/shader/texture-blit.vert | 10 |
10 files changed, 515 insertions, 27 deletions
diff --git a/ui/Makefile.objs b/ui/Makefile.objs index 13b5cfbe41..029a42a688 100644 --- a/ui/Makefile.objs +++ b/ui/Makefile.objs @@ -21,7 +21,20 @@ sdl.mo-objs := sdl.o sdl_zoom.o endif ifeq ($(CONFIG_SDLABI),2.0) sdl.mo-objs := sdl2.o sdl2-input.o sdl2-2d.o +ifeq ($(CONFIG_OPENGL),y) +sdl.mo-objs += sdl2-gl.o +endif endif sdl.mo-cflags := $(SDL_CFLAGS) +ifeq ($(CONFIG_OPENGL),y) +common-obj-y += shader.o +common-obj-y += console-gl.o +endif + gtk.o-cflags := $(GTK_CFLAGS) $(VTE_CFLAGS) +shader.o-cflags += $(OPENGL_CFLAGS) +console-gl.o-cflags += $(OPENGL_CFLAGS) + +shader.o-libs += $(OPENGL_LIBS) +console-gl.o-libs += $(OPENGL_LIBS) diff --git a/ui/console-gl.c b/ui/console-gl.c new file mode 100644 index 0000000000..cb45cf8a29 --- /dev/null +++ b/ui/console-gl.c @@ -0,0 +1,168 @@ +/* + * QEMU graphical console -- opengl helper bits + * + * Copyright (c) 2014 Red Hat + * + * Authors: + * Gerd Hoffmann <kraxel@redhat.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu-common.h" +#include "ui/console.h" +#include "ui/shader.h" + +#include "shader/texture-blit-vert.h" +#include "shader/texture-blit-frag.h" + +struct ConsoleGLState { + GLint texture_blit_prog; +}; + +/* ---------------------------------------------------------------------- */ + +ConsoleGLState *console_gl_init_context(void) +{ + ConsoleGLState *gls = g_new0(ConsoleGLState, 1); + + gls->texture_blit_prog = qemu_gl_create_compile_link_program + (texture_blit_vert_src, texture_blit_frag_src); + if (!gls->texture_blit_prog) { + exit(1); + } + + return gls; +} + +void console_gl_fini_context(ConsoleGLState *gls) +{ + if (!gls) { + return; + } + g_free(gls); +} + +bool console_gl_check_format(DisplayChangeListener *dcl, + pixman_format_code_t format) +{ + switch (format) { + case PIXMAN_BE_b8g8r8x8: + case PIXMAN_BE_b8g8r8a8: + case PIXMAN_r5g6b5: + return true; + default: + return false; + } +} + +void surface_gl_create_texture(ConsoleGLState *gls, + DisplaySurface *surface) +{ + assert(gls); + assert(surface_stride(surface) % surface_bytes_per_pixel(surface) == 0); + + switch (surface->format) { + case PIXMAN_BE_b8g8r8x8: + case PIXMAN_BE_b8g8r8a8: + surface->glformat = GL_BGRA_EXT; + surface->gltype = GL_UNSIGNED_BYTE; + break; + case PIXMAN_r5g6b5: + surface->glformat = GL_RGB; + surface->gltype = GL_UNSIGNED_SHORT_5_6_5; + break; + default: + g_assert_not_reached(); + } + + glGenTextures(1, &surface->texture); + glEnable(GL_TEXTURE_2D); + glBindTexture(GL_TEXTURE_2D, surface->texture); + glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, + surface_stride(surface) / surface_bytes_per_pixel(surface)); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, + surface_width(surface), + surface_height(surface), + 0, surface->glformat, surface->gltype, + surface_data(surface)); + + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); +} + +void surface_gl_update_texture(ConsoleGLState *gls, + DisplaySurface *surface, + int x, int y, int w, int h) +{ + uint8_t *data = (void *)surface_data(surface); + + assert(gls); + + glPixelStorei(GL_UNPACK_ROW_LENGTH_EXT, + surface_stride(surface) / surface_bytes_per_pixel(surface)); + glTexSubImage2D(GL_TEXTURE_2D, 0, + x, y, w, h, + surface->glformat, surface->gltype, + data + surface_stride(surface) * y + + surface_bytes_per_pixel(surface) * x); +} + +void surface_gl_render_texture(ConsoleGLState *gls, + DisplaySurface *surface) +{ + assert(gls); + + glClearColor(0.1f, 0.1f, 0.1f, 0.0f); + glClear(GL_COLOR_BUFFER_BIT); + + qemu_gl_run_texture_blit(gls->texture_blit_prog); +} + +void surface_gl_destroy_texture(ConsoleGLState *gls, + DisplaySurface *surface) +{ + if (!surface || !surface->texture) { + return; + } + glDeleteTextures(1, &surface->texture); + surface->texture = 0; +} + +void surface_gl_setup_viewport(ConsoleGLState *gls, + DisplaySurface *surface, + int ww, int wh) +{ + int gw, gh, stripe; + float sw, sh; + + assert(gls); + + gw = surface_width(surface); + gh = surface_height(surface); + + sw = (float)ww/gw; + sh = (float)wh/gh; + if (sw < sh) { + stripe = wh - wh*sw/sh; + glViewport(0, stripe / 2, ww, wh - stripe); + } else { + stripe = ww - ww*sh/sw; + glViewport(stripe / 2, 0, ww - stripe, wh); + } +} @@ -908,6 +908,16 @@ static const DisplayChangeListenerOps dcl_ops = { .dpy_cursor_define = sdl_mouse_define, }; +void sdl_display_early_init(int opengl) +{ + if (opengl == 1 /* on */) { + fprintf(stderr, + "SDL1 display code has no opengl support.\n" + "Please recompile qemu with SDL2, using\n" + "./configure --enable-sdl --with-sdlabi=2.0\n"); + } +} + void sdl_display_init(DisplayState *ds, int full_screen, int no_frame) { int flags; diff --git a/ui/sdl2-2d.c b/ui/sdl2-2d.c index f907c21895..d0b340f956 100644 --- a/ui/sdl2-2d.c +++ b/ui/sdl2-2d.c @@ -23,12 +23,6 @@ */ /* Ported SDL 1.2 code to 2.0 by Dave Airlie. */ -/* Avoid compiler warning because macro is redefined in SDL_syswm.h. */ -#undef WIN32_LEAN_AND_MEAN - -#include <SDL.h> -#include <SDL_syswm.h> - #include "qemu-common.h" #include "ui/console.h" #include "ui/input.h" @@ -42,6 +36,8 @@ void sdl2_2d_update(DisplayChangeListener *dcl, DisplaySurface *surf = qemu_console_surface(dcl->con); SDL_Rect rect; + assert(!scon->opengl); + if (!surf) { return; } @@ -67,6 +63,8 @@ void sdl2_2d_switch(DisplayChangeListener *dcl, DisplaySurface *old_surface = scon->surface; int format = 0; + assert(!scon->opengl); + scon->surface = new_surface; if (scon->texture) { @@ -91,10 +89,21 @@ void sdl2_2d_switch(DisplayChangeListener *dcl, surface_width(new_surface), surface_height(new_surface)); - if (surface_bits_per_pixel(scon->surface) == 16) { + switch (surface_format(scon->surface)) { + case PIXMAN_x1r5g5b5: + format = SDL_PIXELFORMAT_ARGB1555; + break; + case PIXMAN_r5g6b5: format = SDL_PIXELFORMAT_RGB565; - } else if (surface_bits_per_pixel(scon->surface) == 32) { + break; + case PIXMAN_x8r8g8b8: format = SDL_PIXELFORMAT_ARGB8888; + break; + case PIXMAN_r8g8b8x8: + format = SDL_PIXELFORMAT_RGBA8888; + break; + default: + g_assert_not_reached(); } scon->texture = SDL_CreateTexture(scon->real_renderer, format, SDL_TEXTUREACCESS_STREAMING, @@ -107,12 +116,15 @@ void sdl2_2d_refresh(DisplayChangeListener *dcl) { struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); + assert(!scon->opengl); graphic_hw_update(dcl->con); sdl2_poll_events(scon); } void sdl2_2d_redraw(struct sdl2_console *scon) { + assert(!scon->opengl); + if (!scon->surface) { return; } diff --git a/ui/sdl2-gl.c b/ui/sdl2-gl.c new file mode 100644 index 0000000000..b604c0671e --- /dev/null +++ b/ui/sdl2-gl.c @@ -0,0 +1,112 @@ +/* + * QEMU SDL display driver -- opengl support + * + * Copyright (c) 2014 Red Hat + * + * Authors: + * Gerd Hoffmann <kraxel@redhat.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "qemu-common.h" +#include "ui/console.h" +#include "ui/input.h" +#include "ui/sdl2.h" +#include "sysemu/sysemu.h" + +static void sdl2_gl_render_surface(struct sdl2_console *scon) +{ + int ww, wh; + + SDL_GL_MakeCurrent(scon->real_window, scon->winctx); + + SDL_GetWindowSize(scon->real_window, &ww, &wh); + surface_gl_setup_viewport(scon->gls, scon->surface, ww, wh); + + surface_gl_render_texture(scon->gls, scon->surface); + SDL_GL_SwapWindow(scon->real_window); +} + +void sdl2_gl_update(DisplayChangeListener *dcl, + int x, int y, int w, int h) +{ + struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); + + assert(scon->opengl); + + SDL_GL_MakeCurrent(scon->real_window, scon->winctx); + surface_gl_update_texture(scon->gls, scon->surface, x, y, w, h); + scon->updates++; +} + +void sdl2_gl_switch(DisplayChangeListener *dcl, + DisplaySurface *new_surface) +{ + struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); + DisplaySurface *old_surface = scon->surface; + + assert(scon->opengl); + + SDL_GL_MakeCurrent(scon->real_window, scon->winctx); + surface_gl_destroy_texture(scon->gls, scon->surface); + + scon->surface = new_surface; + + if (!new_surface) { + console_gl_fini_context(scon->gls); + scon->gls = NULL; + sdl2_window_destroy(scon); + return; + } + + if (!scon->real_window) { + sdl2_window_create(scon); + scon->gls = console_gl_init_context(); + } else if (old_surface && + ((surface_width(old_surface) != surface_width(new_surface)) || + (surface_height(old_surface) != surface_height(new_surface)))) { + sdl2_window_resize(scon); + } + + surface_gl_create_texture(scon->gls, scon->surface); +} + +void sdl2_gl_refresh(DisplayChangeListener *dcl) +{ + struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl); + + assert(scon->opengl); + + graphic_hw_update(dcl->con); + if (scon->updates && scon->surface) { + scon->updates = 0; + sdl2_gl_render_surface(scon); + } + sdl2_poll_events(scon); +} + +void sdl2_gl_redraw(struct sdl2_console *scon) +{ + assert(scon->opengl); + + if (scon->surface) { + sdl2_gl_render_surface(scon); + } +} diff --git a/ui/sdl2-input.c b/ui/sdl2-input.c index a1973fc2e0..ac5dc9476b 100644 --- a/ui/sdl2-input.c +++ b/ui/sdl2-input.c @@ -23,12 +23,6 @@ */ /* Ported SDL 1.2 code to 2.0 by Dave Airlie. */ -/* Avoid compiler warning because macro is redefined in SDL_syswm.h. */ -#undef WIN32_LEAN_AND_MEAN - -#include <SDL.h> -#include <SDL_syswm.h> - #include "qemu-common.h" #include "ui/console.h" #include "ui/input.h" @@ -23,12 +23,6 @@ */ /* Ported SDL 1.2 code to 2.0 by Dave Airlie. */ -/* Avoid compiler warning because macro is redefined in SDL_syswm.h. */ -#undef WIN32_LEAN_AND_MEAN - -#include <SDL.h> -#include <SDL_syswm.h> - #include "qemu-common.h" #include "ui/console.h" #include "ui/input.h" @@ -92,6 +86,9 @@ void sdl2_window_create(struct sdl2_console *scon) surface_height(scon->surface), flags); scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0); + if (scon->opengl) { + scon->winctx = SDL_GL_GetCurrentContext(); + } sdl_update_caption(scon); } @@ -118,6 +115,17 @@ void sdl2_window_resize(struct sdl2_console *scon) surface_height(scon->surface)); } +static void sdl2_redraw(struct sdl2_console *scon) +{ + if (scon->opengl) { +#ifdef CONFIG_OPENGL + sdl2_gl_redraw(scon); +#endif + } else { + sdl2_2d_redraw(scon); + } +} + static void sdl_update_caption(struct sdl2_console *scon) { char win_title[1024]; @@ -316,7 +324,7 @@ static void toggle_full_screen(struct sdl2_console *scon) } SDL_SetWindowFullscreen(scon->real_window, 0); } - sdl2_2d_redraw(scon); + sdl2_redraw(scon); } static void handle_keydown(SDL_Event *ev) @@ -364,8 +372,10 @@ static void handle_keydown(SDL_Event *ev) case SDL_SCANCODE_U: sdl2_window_destroy(scon); sdl2_window_create(scon); - /* re-create texture */ - sdl2_2d_switch(&scon->dcl, scon->surface); + if (!scon->opengl) { + /* re-create scon->texture */ + sdl2_2d_switch(&scon->dcl, scon->surface); + } gui_keysym = 1; break; #if 0 @@ -384,7 +394,7 @@ static void handle_keydown(SDL_Event *ev) fprintf(stderr, "%s: scale to %dx%d\n", __func__, width, height); sdl_scale(scon, width, height); - sdl2_2d_redraw(scon); + sdl2_redraw(scon); gui_keysym = 1; } #endif @@ -520,10 +530,10 @@ static void handle_windowevent(SDL_Event *ev) info.height = ev->window.data2; dpy_set_ui_info(scon->dcl.con, &info); } - sdl2_2d_redraw(scon); + sdl2_redraw(scon); break; case SDL_WINDOWEVENT_EXPOSED: - sdl2_2d_redraw(scon); + sdl2_redraw(scon); break; case SDL_WINDOWEVENT_FOCUS_GAINED: case SDL_WINDOWEVENT_ENTER: @@ -677,6 +687,35 @@ static const DisplayChangeListenerOps dcl_2d_ops = { .dpy_cursor_define = sdl_mouse_define, }; +#ifdef CONFIG_OPENGL +static const DisplayChangeListenerOps dcl_gl_ops = { + .dpy_name = "sdl2-gl", + .dpy_gfx_update = sdl2_gl_update, + .dpy_gfx_switch = sdl2_gl_switch, + .dpy_gfx_check_format = console_gl_check_format, + .dpy_refresh = sdl2_gl_refresh, + .dpy_mouse_set = sdl_mouse_warp, + .dpy_cursor_define = sdl_mouse_define, +}; +#endif + +void sdl_display_early_init(int opengl) +{ + switch (opengl) { + case -1: /* default */ + case 0: /* off */ + break; + case 1: /* on */ +#ifdef CONFIG_OPENGL + display_opengl = 1; +#endif + break; + default: + g_assert_not_reached(); + break; + } +} + void sdl_display_init(DisplayState *ds, int full_screen, int no_frame) { int flags; @@ -722,10 +761,16 @@ void sdl_display_init(DisplayState *ds, int full_screen, int no_frame) if (!qemu_console_is_graphic(con)) { sdl2_console[i].hidden = true; } + sdl2_console[i].idx = i; +#ifdef CONFIG_OPENGL + sdl2_console[i].opengl = display_opengl; + sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops; +#else + sdl2_console[i].opengl = 0; sdl2_console[i].dcl.ops = &dcl_2d_ops; +#endif sdl2_console[i].dcl.con = con; register_displaychangelistener(&sdl2_console[i].dcl); - sdl2_console[i].idx = i; } /* Load a 32x32x4 image. White pixels are transparent. */ diff --git a/ui/shader.c b/ui/shader.c new file mode 100644 index 0000000000..52a4632930 --- /dev/null +++ b/ui/shader.c @@ -0,0 +1,114 @@ +/* + * QEMU opengl shader helper functions + * + * Copyright (c) 2014 Red Hat + * + * Authors: + * Gerd Hoffmann <kraxel@redhat.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu-common.h" +#include "ui/shader.h" + +/* ---------------------------------------------------------------------- */ + +void qemu_gl_run_texture_blit(GLint texture_blit_prog) +{ + GLfloat in_position[] = { + -1, -1, + 1, -1, + -1, 1, + 1, 1, + }; + GLint l_position; + + glUseProgram(texture_blit_prog); + l_position = glGetAttribLocation(texture_blit_prog, "in_position"); + glVertexAttribPointer(l_position, 2, GL_FLOAT, GL_FALSE, 0, in_position); + glEnableVertexAttribArray(l_position); + glDrawArrays(GL_TRIANGLE_STRIP, l_position, 4); +} + +/* ---------------------------------------------------------------------- */ + +GLuint qemu_gl_create_compile_shader(GLenum type, const GLchar *src) +{ + GLuint shader; + GLint status, length; + char *errmsg; + + shader = glCreateShader(type); + glShaderSource(shader, 1, &src, 0); + glCompileShader(shader); + + glGetShaderiv(shader, GL_COMPILE_STATUS, &status); + if (!status) { + glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &length); + errmsg = malloc(length); + glGetShaderInfoLog(shader, length, &length, errmsg); + fprintf(stderr, "%s: compile %s error\n%s\n", __func__, + (type == GL_VERTEX_SHADER) ? "vertex" : "fragment", + errmsg); + free(errmsg); + return 0; + } + return shader; +} + +GLuint qemu_gl_create_link_program(GLuint vert, GLuint frag) +{ + GLuint program; + GLint status, length; + char *errmsg; + + program = glCreateProgram(); + glAttachShader(program, vert); + glAttachShader(program, frag); + glLinkProgram(program); + + glGetProgramiv(program, GL_LINK_STATUS, &status); + if (!status) { + glGetProgramiv(program, GL_INFO_LOG_LENGTH, &length); + errmsg = malloc(length); + glGetProgramInfoLog(program, length, &length, errmsg); + fprintf(stderr, "%s: link program: %s\n", __func__, errmsg); + free(errmsg); + return 0; + } + return program; +} + +GLuint qemu_gl_create_compile_link_program(const GLchar *vert_src, + const GLchar *frag_src) +{ + GLuint vert_shader, frag_shader, program; + + vert_shader = qemu_gl_create_compile_shader(GL_VERTEX_SHADER, vert_src); + frag_shader = qemu_gl_create_compile_shader(GL_FRAGMENT_SHADER, frag_src); + if (!vert_shader || !frag_shader) { + return 0; + } + + program = qemu_gl_create_link_program(vert_shader, frag_shader); + glDeleteShader(vert_shader); + glDeleteShader(frag_shader); + + return program; +} diff --git a/ui/shader/texture-blit.frag b/ui/shader/texture-blit.frag new file mode 100644 index 0000000000..bfa202c22b --- /dev/null +++ b/ui/shader/texture-blit.frag @@ -0,0 +1,10 @@ + +#version 300 es + +uniform sampler2D image; +in mediump vec2 ex_tex_coord; +out mediump vec4 out_frag_color; + +void main(void) { + out_frag_color = texture(image, ex_tex_coord); +} diff --git a/ui/shader/texture-blit.vert b/ui/shader/texture-blit.vert new file mode 100644 index 0000000000..6fe2744d68 --- /dev/null +++ b/ui/shader/texture-blit.vert @@ -0,0 +1,10 @@ + +#version 300 es + +in vec2 in_position; +out vec2 ex_tex_coord; + +void main(void) { + gl_Position = vec4(in_position, 0.0, 1.0); + ex_tex_coord = vec2(1.0 + in_position.x, 1.0 - in_position.y) * 0.5; +} |