1 files changed, 304 insertions, 0 deletions
diff --git a/minui/graphics.c b/minui/graphics.c
new file mode 100644
index 000000000..4f3026a25
--- /dev/null
+++ b/minui/graphics.c
@@ -0,0 +1,304 @@
+/*
+ * 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 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");
+        return -1;
+    }
+
+    if(ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) {
+        perror("failed to get fb0 info");
+        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");
+        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 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) {
+        fprintf(stderr,"active fb swap failed!\n");
+    }
+}
+
+static void dumpinfo(struct fb_var_screeninfo *vi)
+{
+    fprintf(stderr,"vi.xres = %d\n", vi->xres);
+    fprintf(stderr,"vi.yres = %d\n", vi->yres);
+    fprintf(stderr,"vi.xresv = %d\n", vi->xres_virtual);
+    fprintf(stderr,"vi.yresv = %d\n", vi->yres_virtual);
+    fprintf(stderr,"vi.xoff = %d\n", vi->xoffset);
+    fprintf(stderr,"vi.yoff = %d\n", vi->yoffset);
+}
+
+void gr_flip(void)
+{
+    GGLContext *gl = gr_context;
+    
+        /* currently active buffer becomes the backbuffer */
+    gl->colorBuffer(gl, gr_framebuffer + gr_active_fb);
+
+        /* swap front and back buffers */
+    gr_active_fb = (gr_active_fb + 1) & 1;
+
+        /* 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)
+{
+    GGLContext *gl;
+    int fd;
+
+    gglInit(&gr_context);
+    gl = gr_context;
+
+    gr_init_font();
+
+    fd = open("/dev/tty0", O_RDWR | O_SYNC);
+    if(fd < 0) return -1;
+
+    if(ioctl(fd, KDSETMODE, (void*) KD_GRAPHICS)) {
+        close(fd);
+        return -1;
+    }
+
+    gr_fb_fd = get_framebuffer(gr_framebuffer);
+    
+    if(gr_fb_fd < 0) {
+        ioctl(fd, KDSETMODE, (void*) KD_TEXT);
+        close(fd);
+        return -1;
+    }
+
+    gr_vt_fd = fd;
+
+        /* start with 0 as front (displayed) and 1 as back (drawing) */
+    gr_active_fb = 0;
+    set_active_framebuffer(0);
+    gl->colorBuffer(gl, gr_framebuffer + 1);
+
+    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;
+    
+    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_framebuffer[1 - gr_active_fb].data;
+}