diff options
Diffstat (limited to 'minui/graphics.cpp')
| -rw-r--r-- | minui/graphics.cpp | 406 |
1 files changed, 406 insertions, 0 deletions
diff --git a/minui/graphics.cpp b/minui/graphics.cpp new file mode 100644 index 0000000..f09f1c6 --- /dev/null +++ b/minui/graphics.cpp @@ -0,0 +1,406 @@ +/* + * 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 <string.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" + +struct GRFont { + GRSurface* texture; + int cwidth; + int cheight; +}; + +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 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) +{ + for (int j = 0; j < height; ++j) { + unsigned char* sx = src_p; + unsigned char* px = dst_p; + for (int 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, bool bold) +{ + GRFont* font = gr_font; + + if (!font->texture || gr_current_a == 0) return; + + bold = bold && (font->texture->height != font->cheight); + + x += overscan_offset_x; + y += overscan_offset_y; + + unsigned char ch; + while ((ch = *s++)) { + if (outside(x, y) || outside(x+font->cwidth-1, y+font->cheight-1)) break; + + if (ch < ' ' || ch > '~') { + ch = '?'; + } + + unsigned char* src_p = font->texture->data + ((ch - ' ') * 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) +{ +#if defined(RECOVERY_ABGR) || defined(RECOVERY_BGRA) + gr_current_r = b; + gr_current_g = g; + gr_current_b = r; + gr_current_a = a; +#else + gr_current_r = r; + gr_current_g = g; + gr_current_b = b; + gr_current_a = a; +#endif +} + +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 { + unsigned char* px = gr_draw->data; + for (int y = 0; y < gr_draw->height; ++y) { + for (int 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 = reinterpret_cast<GRFont*>(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 = reinterpret_cast<GRSurface*>(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 = reinterpret_cast<unsigned char*>(malloc(font.width * font.height)); + gr_font->texture->data = reinterpret_cast<unsigned char*>(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); + GRSurface* 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_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); +} + +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); +} |