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RetroArch/gfx/drivers_font/d3d11_font.c

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2014-2018 - Ali Bouhlel
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#define CINTERFACE
#include <stdio.h>
#include <string.h>
#include <malloc.h>
#include <math.h>
#include <encodings/utf.h>
#include "../font_driver.h"
#include "../video_driver.h"
#include "../common/d3d11_common.h"
#include "../../verbosity.h"
typedef struct
{
d3d11_texture_t texture;
const font_renderer_driver_t* font_driver;
void* font_data;
struct font_atlas* atlas;
} d3d11_font_t;
static void*
d3d11_font_init_font(void* data, const char* font_path, float font_size, bool is_threaded)
{
d3d11_video_t* d3d11 = (d3d11_video_t*)data;
d3d11_font_t* font = (d3d11_font_t*)calloc(1, sizeof(*font));
if (!font)
return NULL;
if (!font_renderer_create_default(
(const void**)&font->font_driver, &font->font_data, font_path, font_size))
{
RARCH_WARN("Couldn't initialize font renderer.\n");
free(font);
return NULL;
}
font->atlas = font->font_driver->get_atlas(font->font_data);
font->texture.sampler = d3d11->samplers[RARCH_FILTER_LINEAR][RARCH_WRAP_BORDER];
font->texture.desc.Width = font->atlas->width;
font->texture.desc.Height = font->atlas->height;
font->texture.desc.Format = DXGI_FORMAT_A8_UNORM;
d3d11_init_texture(d3d11->device, &font->texture);
d3d11_update_texture(
d3d11->context, font->atlas->width, font->atlas->height, font->atlas->width,
DXGI_FORMAT_A8_UNORM, font->atlas->buffer, &font->texture);
font->atlas->dirty = false;
return font;
}
static void d3d11_font_free_font(void* data, bool is_threaded)
{
d3d11_font_t* font = (d3d11_font_t*)data;
if (!font)
return;
if (font->font_driver && font->font_data && font->font_driver->free)
font->font_driver->free(font->font_data);
Release(font->texture.handle);
Release(font->texture.staging);
Release(font->texture.view);
free(font);
}
static int d3d11_font_get_message_width(void* data, const char* msg, unsigned msg_len, float scale)
{
d3d11_font_t* font = (d3d11_font_t*)data;
unsigned i;
int delta_x = 0;
if (!font)
return 0;
for (i = 0; i < msg_len; i++)
{
const struct font_glyph *glyph;
const char* msg_tmp = &msg[i];
unsigned code = utf8_walk(&msg_tmp);
unsigned skip = msg_tmp - &msg[i];
if (skip > 1)
i += skip - 1;
glyph = font->font_driver->get_glyph(font->font_data, code);
if (!glyph) /* Do something smarter here ... */
glyph = font->font_driver->get_glyph(font->font_data, '?');
if (!glyph)
continue;
delta_x += glyph->advance_x;
}
return delta_x * scale;
}
static void d3d11_font_render_line(
video_frame_info_t* video_info,
d3d11_font_t* font,
const char* msg,
unsigned msg_len,
float scale,
const unsigned int color,
float pos_x,
float pos_y,
unsigned text_align)
{
unsigned i, count;
D3D11_MAPPED_SUBRESOURCE mapped_vbo;
d3d11_sprite_t* v;
d3d11_video_t* d3d11 = (d3d11_video_t*)video_info->userdata;
unsigned width = video_info->width;
unsigned height = video_info->height;
int x = roundf(pos_x * width);
int y = roundf((1.0 - pos_y) * height);
if ( !d3d11 ||
!d3d11->sprites.enabled ||
msg_len > (unsigned)d3d11->sprites.capacity)
return;
if (d3d11->sprites.offset + msg_len > (unsigned)d3d11->sprites.capacity)
d3d11->sprites.offset = 0;
switch (text_align)
{
case TEXT_ALIGN_RIGHT:
x -= d3d11_font_get_message_width(font, msg, msg_len, scale);
break;
case TEXT_ALIGN_CENTER:
x -= d3d11_font_get_message_width(font, msg, msg_len, scale) / 2;
break;
}
D3D11MapBuffer(d3d11->context, d3d11->sprites.vbo, 0, D3D11_MAP_WRITE_NO_OVERWRITE, 0, &mapped_vbo);
v = (d3d11_sprite_t*)mapped_vbo.pData + d3d11->sprites.offset;
for (i = 0; i < msg_len; i++)
{
const struct font_glyph* glyph;
const char* msg_tmp = &msg[i];
unsigned code = utf8_walk(&msg_tmp);
unsigned skip = msg_tmp - &msg[i];
if (skip > 1)
i += skip - 1;
glyph = font->font_driver->get_glyph(font->font_data, code);
if (!glyph) /* Do something smarter here ... */
glyph = font->font_driver->get_glyph(font->font_data, '?');
if (!glyph)
continue;
v->pos.x = (x + glyph->draw_offset_x) * scale / (float)d3d11->viewport.Width;
v->pos.y = (y + glyph->draw_offset_y) * scale / (float)d3d11->viewport.Height;
v->pos.w = glyph->width * scale / (float)d3d11->viewport.Width;
v->pos.h = glyph->height * scale / (float)d3d11->viewport.Height;
v->coords.u = glyph->atlas_offset_x / (float)font->texture.desc.Width;
v->coords.v = glyph->atlas_offset_y / (float)font->texture.desc.Height;
v->coords.w = glyph->width / (float)font->texture.desc.Width;
v->coords.h = glyph->height / (float)font->texture.desc.Height;
v->params.scaling = 1;
v->params.rotation = 0;
v->colors[0] = color;
v->colors[1] = color;
v->colors[2] = color;
v->colors[3] = color;
v++;
x += glyph->advance_x * scale;
y += glyph->advance_y * scale;
}
count = v - ((d3d11_sprite_t*)mapped_vbo.pData + d3d11->sprites.offset);
D3D11UnmapBuffer(d3d11->context, d3d11->sprites.vbo, 0);
if (!count)
return;
if (font->atlas->dirty)
{
d3d11_update_texture(
d3d11->context, font->atlas->width, font->atlas->height, font->atlas->width,
DXGI_FORMAT_A8_UNORM, font->atlas->buffer, &font->texture);
font->atlas->dirty = false;
}
d3d11_set_texture_and_sampler(d3d11->context, 0, &font->texture);
D3D11SetBlendState(d3d11->context, d3d11->blend_enable, NULL, D3D11_DEFAULT_SAMPLE_MASK);
D3D11SetPShader(d3d11->context, d3d11->sprites.shader_font.ps, NULL, 0);
D3D11Draw(d3d11->context, count, d3d11->sprites.offset);
D3D11SetPShader(d3d11->context, d3d11->sprites.shader.ps, NULL, 0);
d3d11->sprites.offset += count;
}
static void d3d11_font_render_message(
video_frame_info_t* video_info,
d3d11_font_t* font,
const char* msg,
float scale,
const unsigned int color,
float pos_x,
float pos_y,
unsigned text_align)
{
int lines = 0;
float line_height;
if (!msg || !*msg)
return;
/* If the font height is not supported just draw as usual */
if (!font->font_driver->get_line_height)
{
d3d11_font_render_line(
video_info, font, msg, strlen(msg), scale, color, pos_x, pos_y, text_align);
return;
}
line_height = font->font_driver->get_line_height(font->font_data) * scale / video_info->height;
for (;;)
{
const char* delim = strchr(msg, '\n');
/* Draw the line */
if (delim)
{
unsigned msg_len = delim - msg;
d3d11_font_render_line(
video_info, font, msg, msg_len, scale, color, pos_x,
pos_y - (float)lines * line_height, text_align);
msg += msg_len + 1;
lines++;
}
else
{
unsigned msg_len = strlen(msg);
d3d11_font_render_line(
video_info, font, msg, msg_len, scale, color, pos_x,
pos_y - (float)lines * line_height, text_align);
break;
}
}
}
static void d3d11_font_render_msg(
video_frame_info_t* video_info, void* data,
const char* msg, const struct font_params *params)
{
float x, y, scale, drop_mod, drop_alpha;
int drop_x, drop_y;
enum text_alignment text_align;
unsigned color, color_dark, r, g, b,
alpha, r_dark, g_dark, b_dark, alpha_dark;
d3d11_font_t* font = (d3d11_font_t*)data;
unsigned width = video_info->width;
unsigned height = video_info->height;
if (!font || !msg || !*msg)
return;
if (params)
{
x = params->x;
y = params->y;
scale = params->scale;
text_align = params->text_align;
drop_x = params->drop_x;
drop_y = params->drop_y;
drop_mod = params->drop_mod;
drop_alpha = params->drop_alpha;
r = FONT_COLOR_GET_RED(params->color);
g = FONT_COLOR_GET_GREEN(params->color);
b = FONT_COLOR_GET_BLUE(params->color);
alpha = FONT_COLOR_GET_ALPHA(params->color);
color = DXGI_COLOR_RGBA(r, g, b, alpha);
}
else
{
x = video_info->font_msg_pos_x;
y = video_info->font_msg_pos_y;
scale = 1.0f;
text_align = TEXT_ALIGN_LEFT;
r = (video_info->font_msg_color_r * 255);
g = (video_info->font_msg_color_g * 255);
b = (video_info->font_msg_color_b * 255);
alpha = 255;
color = DXGI_COLOR_RGBA(r, g, b, alpha);
drop_x = -2;
drop_y = -2;
drop_mod = 0.3f;
drop_alpha = 1.0f;
}
if (drop_x || drop_y)
{
r_dark = r * drop_mod;
g_dark = g * drop_mod;
b_dark = b * drop_mod;
alpha_dark = alpha * drop_alpha;
color_dark = DXGI_COLOR_RGBA(r_dark, g_dark, b_dark, alpha_dark);
d3d11_font_render_message(
video_info, font, msg, scale, color_dark,
x + scale * drop_x / width,
y + scale * drop_y / height, text_align);
}
d3d11_font_render_message(video_info, font, msg, scale,
color, x, y, text_align);
}
static const struct font_glyph* d3d11_font_get_glyph(void *data, uint32_t code)
{
d3d11_font_t* font = (d3d11_font_t*)data;
if (!font || !font->font_driver)
return NULL;
if (!font->font_driver->ident)
return NULL;
return font->font_driver->get_glyph((void*)font->font_driver, code);
}
static void d3d11_font_bind_block(void* data, void *userdata)
{
(void)data;
}
font_renderer_t d3d11_font = {
d3d11_font_init_font,
d3d11_font_free_font,
d3d11_font_render_msg,
"d3d11font",
d3d11_font_get_glyph,
d3d11_font_bind_block,
NULL, /* flush */
d3d11_font_get_message_width,
};
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