Switch minui over to C++.
Change-Id: I59e08a304ae514a3fdb6fab58721f11670bc1b01
diff --git a/minui/graphics.cpp b/minui/graphics.cpp
new file mode 100644
index 0000000..d7d6e8d
--- /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);
+}