/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <linux/fb.h>
#include <linux/kd.h>
#include <time.h>
#include "font_10x18.h"
#include "minui.h"
#include "graphics.h"
typedef struct {
GRSurface* texture;
int cwidth;
int cheight;
} GRFont;
static GRFont* gr_font = NULL;
static minui_backend* gr_backend = NULL;
static int overscan_percent = OVERSCAN_PERCENT;
static int overscan_offset_x = 0;
static int overscan_offset_y = 0;
static int gr_vt_fd = -1;
static unsigned char gr_current_r = 255;
static unsigned char gr_current_g = 255;
static unsigned char gr_current_b = 255;
static unsigned char gr_current_a = 255;
static GRSurface* gr_draw = NULL;
static bool outside(int x, int y)
{
return x < 0 || x >= gr_draw->width || y < 0 || y >= gr_draw->height;
}
int gr_measure(const char *s)
{
return gr_font->cwidth * strlen(s);
}
void gr_font_size(int *x, int *y)
{
*x = gr_font->cwidth;
*y = gr_font->cheight;
}
static void text_blend(unsigned char* src_p, int src_row_bytes,
unsigned char* dst_p, int dst_row_bytes,
int width, int height)
{
int i, j;
for (j = 0; j < height; ++j) {
unsigned char* sx = src_p;
unsigned char* px = dst_p;
for (i = 0; i < width; ++i) {
unsigned char a = *sx++;
if (gr_current_a < 255) a = ((int)a * gr_current_a) / 255;
if (a == 255) {
*px++ = gr_current_r;
*px++ = gr_current_g;
*px++ = gr_current_b;
px++;
} else if (a > 0) {
*px = (*px * (255-a) + gr_current_r * a) / 255;
++px;
*px = (*px * (255-a) + gr_current_g * a) / 255;
++px;
*px = (*px * (255-a) + gr_current_b * a) / 255;
++px;
++px;
} else {
px += 4;
}
}
src_p += src_row_bytes;
dst_p += dst_row_bytes;
}
}
void gr_text(int x, int y, const char *s, int bold)
{
GRFont *font = gr_font;
unsigned off;
if (!font->texture) return;
if (gr_current_a == 0) return;
bold = bold && (font->texture->height != font->cheight);
x += overscan_offset_x;
y += overscan_offset_y;
while((off = *s++)) {
off -= 32;
if (outside(x, y) || outside(x+font->cwidth-1, y+font->cheight-1)) break;
if (off < 96) {
unsigned char* src_p = font->texture->data + (off * font->cwidth) +
(bold ? font->cheight * font->texture->row_bytes : 0);
unsigned char* dst_p = gr_draw->data + y*gr_draw->row_bytes + x*gr_draw->pixel_bytes;
text_blend(src_p, font->texture->row_bytes,
dst_p, gr_draw->row_bytes,
font->cwidth, font->cheight);
}
x += font->cwidth;
}
}
void gr_texticon(int x, int y, GRSurface* icon) {
if (icon == NULL) return;
if (icon->pixel_bytes != 1) {
printf("gr_texticon: source has wrong format\n");
return;
}
x += overscan_offset_x;
y += overscan_offset_y;
if (outside(x, y) || outside(x+icon->width-1, y+icon->height-1)) return;
unsigned char* src_p = icon->data;
unsigned char* dst_p = gr_draw->data + y*gr_draw->row_bytes + x*gr_draw->pixel_bytes;
text_blend(src_p, icon->row_bytes,
dst_p, gr_draw->row_bytes,
icon->width, icon->height);
}
void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
{
gr_current_r = r;
gr_current_g = g;
gr_current_b = b;
gr_current_a = a;
}
void gr_clear()
{
if (gr_current_r == gr_current_g &&
gr_current_r == gr_current_b) {
memset(gr_draw->data, gr_current_r, gr_draw->height * gr_draw->row_bytes);
} else {
int x, y;
unsigned char* px = gr_draw->data;
for (y = 0; y < gr_draw->height; ++y) {
for (x = 0; x < gr_draw->width; ++x) {
*px++ = gr_current_r;
*px++ = gr_current_g;
*px++ = gr_current_b;
px++;
}
px += gr_draw->row_bytes - (gr_draw->width * gr_draw->pixel_bytes);
}
}
}
void gr_fill(int x1, int y1, int x2, int y2)
{
x1 += overscan_offset_x;
y1 += overscan_offset_y;
x2 += overscan_offset_x;
y2 += overscan_offset_y;
if (outside(x1, y1) || outside(x2-1, y2-1)) return;
unsigned char* p = gr_draw->data + y1 * gr_draw->row_bytes + x1 * gr_draw->pixel_bytes;
if (gr_current_a == 255) {
int x, y;
for (y = y1; y < y2; ++y) {
unsigned char* px = p;
for (x = x1; x < x2; ++x) {
*px++ = gr_current_r;
*px++ = gr_current_g;
*px++ = gr_current_b;
px++;
}
p += gr_draw->row_bytes;
}
} else if (gr_current_a > 0) {
int x, y;
for (y = y1; y < y2; ++y) {
unsigned char* px = p;
for (x = x1; x < x2; ++x) {
*px = (*px * (255-gr_current_a) + gr_current_r * gr_current_a) / 255;
++px;
*px = (*px * (255-gr_current_a) + gr_current_g * gr_current_a) / 255;
++px;
*px = (*px * (255-gr_current_a) + gr_current_b * gr_current_a) / 255;
++px;
++px;
}
p += gr_draw->row_bytes;
}
}
}
void gr_blit(GRSurface* source, int sx, int sy, int w, int h, int dx, int dy) {
if (source == NULL) return;
if (gr_draw->pixel_bytes != source->pixel_bytes) {
printf("gr_blit: source has wrong format\n");
return;
}
dx += overscan_offset_x;
dy += overscan_offset_y;
if (outside(dx, dy) || outside(dx+w-1, dy+h-1)) return;
unsigned char* src_p = source->data + sy*source->row_bytes + sx*source->pixel_bytes;
unsigned char* dst_p = gr_draw->data + dy*gr_draw->row_bytes + dx*gr_draw->pixel_bytes;
int i;
for (i = 0; i < h; ++i) {
memcpy(dst_p, src_p, w * source->pixel_bytes);
src_p += source->row_bytes;
dst_p += gr_draw->row_bytes;
}
}
unsigned int gr_get_width(GRSurface* surface) {
if (surface == NULL) {
return 0;
}
return surface->width;
}
unsigned int gr_get_height(GRSurface* surface) {
if (surface == NULL) {
return 0;
}
return surface->height;
}
static void gr_init_font(void)
{
gr_font = calloc(sizeof(*gr_font), 1);
int res = res_create_alpha_surface("font", &(gr_font->texture));
if (res == 0) {
// The font image should be a 96x2 array of character images. The
// columns are the printable ASCII characters 0x20 - 0x7f. The
// top row is regular text; the bottom row is bold.
gr_font->cwidth = gr_font->texture->width / 96;
gr_font->cheight = gr_font->texture->height / 2;
} else {
printf("failed to read font: res=%d\n", res);
// fall back to the compiled-in font.
gr_font->texture = malloc(sizeof(*gr_font->texture));
gr_font->texture->width = font.width;
gr_font->texture->height = font.height;
gr_font->texture->row_bytes = font.width;
gr_font->texture->pixel_bytes = 1;
unsigned char* bits = malloc(font.width * font.height);
gr_font->texture->data = (void*) bits;
unsigned char data;
unsigned char* in = font.rundata;
while((data = *in++)) {
memset(bits, (data & 0x80) ? 255 : 0, data & 0x7f);
bits += (data & 0x7f);
}
gr_font->cwidth = font.cwidth;
gr_font->cheight = font.cheight;
}
}
#if 0
// Exercises many of the gr_*() functions; useful for testing.
static void gr_test() {
GRSurface** images;
int frames;
int result = res_create_multi_surface("icon_installing", &frames, &images);
if (result < 0) {
printf("create surface %d\n", result);
gr_exit();
return;
}
time_t start = time(NULL);
int x;
for (x = 0; x <= 1200; ++x) {
if (x < 400) {
gr_color(0, 0, 0, 255);
} else {
gr_color(0, (x-400)%128, 0, 255);
}
gr_clear();
gr_color(255, 0, 0, 255);
gr_surface frame = images[x%frames];
gr_blit(frame, 0, 0, frame->width, frame->height, x, 0);
gr_color(255, 0, 0, 128);
gr_fill(400, 150, 600, 350);
gr_color(255, 255, 255, 255);
gr_text(500, 225, "hello, world!", 0);
gr_color(255, 255, 0, 128);
gr_text(300+x, 275, "pack my box with five dozen liquor jugs", 1);
gr_color(0, 0, 255, 128);
gr_fill(gr_draw->width - 200 - x, 300, gr_draw->width - x, 500);
gr_draw = gr_backend->flip(gr_backend);
}
printf("getting end time\n");
time_t end = time(NULL);
printf("got end time\n");
printf("start %ld end %ld\n", (long)start, (long)end);
if (end > start) {
printf("%.2f fps\n", ((double)x) / (end-start));
}
}
#endif
void gr_flip() {
gr_draw = gr_backend->flip(gr_backend);
}
int gr_init(void)
{
gr_init_font();
gr_vt_fd = open("/dev/tty0", O_RDWR | O_SYNC);
if (gr_vt_fd < 0) {
// This is non-fatal; post-Cupcake kernels don't have tty0.
perror("can't open /dev/tty0");
} else if (ioctl(gr_vt_fd, KDSETMODE, (void*) KD_GRAPHICS)) {
// However, if we do open tty0, we expect the ioctl to work.
perror("failed KDSETMODE to KD_GRAPHICS on tty0");
gr_exit();
return -1;
}
gr_backend = open_adf();
if (gr_backend) {
gr_draw = gr_backend->init(gr_backend);
if (!gr_draw) {
gr_backend->exit(gr_backend);
}
}
if (!gr_draw) {
gr_backend = open_fbdev();
gr_draw = gr_backend->init(gr_backend);
if (gr_draw == NULL) {
return -1;
}
}
overscan_offset_x = gr_draw->width * overscan_percent / 100;
overscan_offset_y = gr_draw->height * overscan_percent / 100;
gr_flip();
gr_flip();
return 0;
}
void gr_exit(void)
{
gr_backend->exit(gr_backend);
ioctl(gr_vt_fd, KDSETMODE, (void*) KD_TEXT);
close(gr_vt_fd);
gr_vt_fd = -1;
}
int gr_fb_width(void)
{
return gr_draw->width - 2*overscan_offset_x;
}
int gr_fb_height(void)
{
return gr_draw->height - 2*overscan_offset_y;
}
void gr_fb_blank(bool blank)
{
gr_backend->blank(gr_backend, blank);
}