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Diffstat (limited to '')
-rw-r--r-- | minui/graphics.c | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/minui/graphics.c b/minui/graphics.c new file mode 100644 index 000000000..06c5fdfcd --- /dev/null +++ b/minui/graphics.c @@ -0,0 +1,312 @@ +/* + * 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 <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 <pixelflinger/pixelflinger.h> + +#include "font_10x18.h" +#include "minui.h" + +typedef struct { + GGLSurface texture; + unsigned cwidth; + unsigned cheight; + unsigned ascent; +} GRFont; + +static GRFont *gr_font = 0; +static GGLContext *gr_context = 0; +static GGLSurface gr_font_texture; +static GGLSurface gr_framebuffer[2]; +static GGLSurface gr_mem_surface; +static unsigned gr_active_fb = 0; + +static int gr_fb_fd = -1; +static int gr_vt_fd = -1; + +static struct fb_var_screeninfo vi; + +static int get_framebuffer(GGLSurface *fb) +{ + int fd; + struct fb_fix_screeninfo fi; + void *bits; + + fd = open("/dev/graphics/fb0", O_RDWR); + if (fd < 0) { + perror("cannot open fb0"); + return -1; + } + + if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) { + perror("failed to get fb0 info"); + close(fd); + return -1; + } + + if (ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) { + perror("failed to get fb0 info"); + close(fd); + return -1; + } + + bits = mmap(0, fi.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); + if (bits == MAP_FAILED) { + perror("failed to mmap framebuffer"); + close(fd); + return -1; + } + + fb->version = sizeof(*fb); + fb->width = vi.xres; + fb->height = vi.yres; + fb->stride = vi.xres; + fb->data = bits; + fb->format = GGL_PIXEL_FORMAT_RGB_565; + + fb++; + + fb->version = sizeof(*fb); + fb->width = vi.xres; + fb->height = vi.yres; + fb->stride = vi.xres; + fb->data = (void*) (((unsigned) bits) + vi.yres * vi.xres * 2); + fb->format = GGL_PIXEL_FORMAT_RGB_565; + + return fd; +} + +static void get_memory_surface(GGLSurface* ms) { + ms->version = sizeof(*ms); + ms->width = vi.xres; + ms->height = vi.yres; + ms->stride = vi.xres; + ms->data = malloc(vi.xres * vi.yres * 2); + ms->format = GGL_PIXEL_FORMAT_RGB_565; +} + +static void set_active_framebuffer(unsigned n) +{ + if (n > 1) return; + vi.yres_virtual = vi.yres * 2; + vi.yoffset = n * vi.yres; + if (ioctl(gr_fb_fd, FBIOPUT_VSCREENINFO, &vi) < 0) { + perror("active fb swap failed"); + } +} + +void gr_flip(void) +{ + GGLContext *gl = gr_context; + + /* swap front and back buffers */ + gr_active_fb = (gr_active_fb + 1) & 1; + + /* copy data from the in-memory surface to the buffer we're about + * to make active. */ + memcpy(gr_framebuffer[gr_active_fb].data, gr_mem_surface.data, + vi.xres * vi.yres * 2); + + /* inform the display driver */ + set_active_framebuffer(gr_active_fb); +} + +void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a) +{ + GGLContext *gl = gr_context; + GGLint color[4]; + color[0] = ((r << 8) | r) + 1; + color[1] = ((g << 8) | g) + 1; + color[2] = ((b << 8) | b) + 1; + color[3] = ((a << 8) | a) + 1; + gl->color4xv(gl, color); +} + +int gr_measure(const char *s) +{ + return gr_font->cwidth * strlen(s); +} + +int gr_text(int x, int y, const char *s) +{ + GGLContext *gl = gr_context; + GRFont *font = gr_font; + unsigned off; + + y -= font->ascent; + + gl->bindTexture(gl, &font->texture); + gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE); + gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); + gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); + gl->enable(gl, GGL_TEXTURE_2D); + + while((off = *s++)) { + off -= 32; + if (off < 96) { + gl->texCoord2i(gl, (off * font->cwidth) - x, 0 - y); + gl->recti(gl, x, y, x + font->cwidth, y + font->cheight); + } + x += font->cwidth; + } + + return x; +} + +void gr_fill(int x, int y, int w, int h) +{ + GGLContext *gl = gr_context; + gl->disable(gl, GGL_TEXTURE_2D); + gl->recti(gl, x, y, w, h); +} + +void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy) { + if (gr_context == NULL) { + return; + } + GGLContext *gl = gr_context; + + gl->bindTexture(gl, (GGLSurface*) source); + gl->texEnvi(gl, GGL_TEXTURE_ENV, GGL_TEXTURE_ENV_MODE, GGL_REPLACE); + gl->texGeni(gl, GGL_S, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); + gl->texGeni(gl, GGL_T, GGL_TEXTURE_GEN_MODE, GGL_ONE_TO_ONE); + gl->enable(gl, GGL_TEXTURE_2D); + gl->texCoord2i(gl, sx - dx, sy - dy); + gl->recti(gl, dx, dy, dx + w, dy + h); +} + +unsigned int gr_get_width(gr_surface surface) { + if (surface == NULL) { + return 0; + } + return ((GGLSurface*) surface)->width; +} + +unsigned int gr_get_height(gr_surface surface) { + if (surface == NULL) { + return 0; + } + return ((GGLSurface*) surface)->height; +} + +static void gr_init_font(void) +{ + GGLSurface *ftex; + unsigned char *bits, *rle; + unsigned char *in, data; + + gr_font = calloc(sizeof(*gr_font), 1); + ftex = &gr_font->texture; + + bits = malloc(font.width * font.height); + + ftex->version = sizeof(*ftex); + ftex->width = font.width; + ftex->height = font.height; + ftex->stride = font.width; + ftex->data = (void*) bits; + ftex->format = GGL_PIXEL_FORMAT_A_8; + + 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; + gr_font->ascent = font.cheight - 2; +} + +int gr_init(void) +{ + gglInit(&gr_context); + GGLContext *gl = gr_context; + + 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_fb_fd = get_framebuffer(gr_framebuffer); + if (gr_fb_fd < 0) { + gr_exit(); + return -1; + } + + get_memory_surface(&gr_mem_surface); + + fprintf(stderr, "framebuffer: fd %d (%d x %d)\n", + gr_fb_fd, gr_framebuffer[0].width, gr_framebuffer[0].height); + + /* start with 0 as front (displayed) and 1 as back (drawing) */ + gr_active_fb = 0; + set_active_framebuffer(0); + gl->colorBuffer(gl, &gr_mem_surface); + + + gl->activeTexture(gl, 0); + gl->enable(gl, GGL_BLEND); + gl->blendFunc(gl, GGL_SRC_ALPHA, GGL_ONE_MINUS_SRC_ALPHA); + + return 0; +} + +void gr_exit(void) +{ + close(gr_fb_fd); + gr_fb_fd = -1; + + free(gr_mem_surface.data); + + ioctl(gr_vt_fd, KDSETMODE, (void*) KD_TEXT); + close(gr_vt_fd); + gr_vt_fd = -1; +} + +int gr_fb_width(void) +{ + return gr_framebuffer[0].width; +} + +int gr_fb_height(void) +{ + return gr_framebuffer[0].height; +} + +gr_pixel *gr_fb_data(void) +{ + return (unsigned short *) gr_mem_surface.data; +} |