1 files changed, 406 insertions, 0 deletions

diff --git a/minui/graphics.cpp b/minui/graphics.cpp
new file mode 100644
index 000000000..d7d6e8d5a
--- /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, int 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);
+        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_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);
+}