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diff --git a/subprojects/nk_pugl/nuklear/demo/x11_rawfb/nuklear_rawfb.h b/subprojects/nk_pugl/nuklear/demo/x11_rawfb/nuklear_rawfb.h
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+/*
+ * MIT License
+ *
+ * Copyright (c) 2016-2017 Patrick Rudolph <siro@das-labor.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+*/
+/*
+ * ==============================================================
+ *
+ * API
+ *
+ * ===============================================================
+ */
+#ifndef NK_RAWFB_H_
+#define NK_RAWFB_H_
+
+struct rawfb_context;
+
+/* All functions are thread-safe */
+NK_API struct rawfb_context *nk_rawfb_init(void *fb, void *tex_mem, const unsigned int w, const unsigned int h, const unsigned int pitch);
+NK_API void nk_rawfb_render(const struct rawfb_context *rawfb, const struct nk_color clear, const unsigned char enable_clear);
+NK_API void nk_rawfb_shutdown(struct rawfb_context *rawfb);
+NK_API void nk_rawfb_resize_fb(struct rawfb_context *rawfb, void *fb, const unsigned int w, const unsigned int h, const unsigned int pitch);
+
+#endif
+/*
+ * ==============================================================
+ *
+ * IMPLEMENTATION
+ *
+ * ===============================================================
+ */
+#ifdef NK_RAWFB_IMPLEMENTATION
+
+struct rawfb_image {
+ void *pixels;
+ int w, h, pitch;
+ enum nk_font_atlas_format format;
+};
+struct rawfb_context {
+ struct nk_context ctx;
+ struct nk_rect scissors;
+ struct rawfb_image fb;
+ struct rawfb_image font_tex;
+ struct nk_font_atlas atlas;
+};
+
+#ifndef MIN
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+#ifndef MAX
+#define MAX(a,b) ((a) < (b) ? (b) : (a))
+#endif
+
+static unsigned int
+nk_color_from_byte(const nk_byte *c)
+{
+ unsigned int res = 0;
+#if defined(RAWFB_RGBX_8888)
+ res |= (unsigned int)c[0] << 16;
+ res |= (unsigned int)c[1] << 8;
+ res |= (unsigned int)c[2] << 0;
+#elif defined(RAWFB_XRGB_8888)
+ res = ((unsigned int *)c)[0];
+#else
+#error Define one of RAWFB_RGBX_8888 , RAWFB_XRGB_8888
+#endif
+ return (res);
+}
+
+static void
+nk_rawfb_setpixel(const struct rawfb_context *rawfb,
+ const short x0, const short y0, const struct nk_color col)
+{
+ unsigned int c = nk_color_from_byte(&col.r);
+ unsigned char *pixels = rawfb->fb.pixels;
+ unsigned int *ptr;
+
+ pixels += y0 * rawfb->fb.pitch;
+ ptr = (unsigned int *)pixels;
+ ptr += x0;
+
+ if (y0 < rawfb->scissors.h && y0 >= rawfb->scissors.y &&
+ x0 >= rawfb->scissors.x && x0 < rawfb->scissors.w)
+ *ptr = c;
+}
+
+static void
+nk_rawfb_line_horizontal(const struct rawfb_context *rawfb,
+ const short x0, const short y, const short x1, const struct nk_color col)
+{
+ /* This function is called the most. Try to optimize it a bit...
+ * It does not check for scissors or image borders.
+ * The caller has to make sure it does no exceed bounds. */
+ unsigned int i, n;
+ unsigned int c[16];
+ unsigned char *pixels = rawfb->fb.pixels;
+ unsigned int *ptr;
+
+ pixels += y * rawfb->fb.pitch;
+ ptr = (unsigned int *)pixels;
+ ptr += x0;
+
+ n = x1 - x0;
+ for (i = 0; i < sizeof(c) / sizeof(c[0]); i++)
+ c[i] = nk_color_from_byte(&col.r);
+
+ while (n > 16) {
+ memcpy((void *)ptr, c, sizeof(c));
+ n -= 16; ptr += 16;
+ } for (i = 0; i < n; i++)
+ ptr[i] = c[i];
+}
+
+static void
+nk_rawfb_imagesetpixel(const struct rawfb_image *img,
+ const int x0, const int y0, const struct nk_color col)
+{
+ unsigned char *ptr;
+ NK_ASSERT(img);
+ if (y0 < img->h && y0 > 0 && x0 > 0 && x0 < img->w) {
+ ptr = img->pixels;
+ if (img->format == NK_FONT_ATLAS_ALPHA8) {
+ ptr += img->pitch * y0;
+ ptr[x0] = col.a;
+ } else {
+ ptr += img->pitch * y0;
+ ((struct nk_color *)ptr)[x0] = col;
+ }
+ }
+}
+
+static struct nk_color
+nk_image_getpixel(const struct rawfb_image *img, const int x0, const int y0)
+{
+ struct nk_color col = {0, 0, 0, 0};
+ unsigned char *ptr;
+ NK_ASSERT(img);
+ if (y0 < img->h && y0 > 0 && x0 > 0 && x0 < img->w) {
+ ptr = img->pixels;
+ if (img->format == NK_FONT_ATLAS_ALPHA8) {
+ ptr += img->pitch * y0;
+ col.a = ptr[x0];
+ col.b = col.g = col.r = 0xff;
+ } else {
+ ptr += img->pitch * y0;
+ col = ((struct nk_color *)ptr)[x0];
+ }
+ } return col;
+}
+
+static void
+nk_image_blendpixel(const struct rawfb_image *img,
+ const int x0, const int y0, struct nk_color col)
+{
+ struct nk_color col2;
+ unsigned char inv_a;
+ if (col.a == 0)
+ return;
+
+ inv_a = 0xff - col.a;
+ col2 = nk_image_getpixel(img, x0, y0);
+ col.r = (col.r * col.a + col2.r * inv_a) >> 8;
+ col.g = (col.g * col.a + col2.g * inv_a) >> 8;
+ col.b = (col.b * col.a + col2.b * inv_a) >> 8;
+ nk_rawfb_imagesetpixel(img, x0, y0, col);
+}
+
+static void
+nk_rawfb_scissor(struct rawfb_context *rawfb,
+ const float x,
+ const float y,
+ const float w,
+ const float h)
+{
+ rawfb->scissors.x = MIN(MAX(x, 0), rawfb->fb.w);
+ rawfb->scissors.y = MIN(MAX(y, 0), rawfb->fb.h);
+ rawfb->scissors.w = MIN(MAX(w + x, 0), rawfb->fb.w);
+ rawfb->scissors.h = MIN(MAX(h + y, 0), rawfb->fb.h);
+}
+
+static void
+nk_rawfb_stroke_line(const struct rawfb_context *rawfb,
+ short x0, short y0, short x1, short y1,
+ const unsigned int line_thickness, const struct nk_color col)
+{
+ short tmp;
+ int dy, dx, stepx, stepy;
+
+ dy = y1 - y0;
+ dx = x1 - x0;
+
+ /* fast path */
+ if (dy == 0) {
+ if (dx == 0 || y0 >= rawfb->scissors.h || y0 < rawfb->scissors.y)
+ return;
+
+ if (dx < 0) {
+ /* swap x0 and x1 */
+ tmp = x1;
+ x1 = x0;
+ x0 = tmp;
+ }
+ x1 = MIN(rawfb->scissors.w - 1, x1);
+ x0 = MIN(rawfb->scissors.w - 1, x0);
+ x1 = MAX(rawfb->scissors.x, x1);
+ x0 = MAX(rawfb->scissors.x, x0);
+ nk_rawfb_line_horizontal(rawfb, x0, y0, x1, col);
+ return;
+ }
+ if (dy < 0) {
+ dy = -dy;
+ stepy = -1;
+ } else stepy = 1;
+
+ if (dx < 0) {
+ dx = -dx;
+ stepx = -1;
+ } else stepx = 1;
+
+ dy <<= 1;
+ dx <<= 1;
+
+ nk_rawfb_setpixel(rawfb, x0, y0, col);
+ if (dx > dy) {
+ int fraction = dy - (dx >> 1);
+ while (x0 != x1) {
+ if (fraction >= 0) {
+ y0 += stepy;
+ fraction -= dx;
+ }
+ x0 += stepx;
+ fraction += dy;
+ nk_rawfb_setpixel(rawfb, x0, y0, col);
+ }
+ } else {
+ int fraction = dx - (dy >> 1);
+ while (y0 != y1) {
+ if (fraction >= 0) {
+ x0 += stepx;
+ fraction -= dy;
+ }
+ y0 += stepy;
+ fraction += dx;
+ nk_rawfb_setpixel(rawfb, x0, y0, col);
+ }
+ }
+}
+
+static void
+nk_rawfb_fill_polygon(const struct rawfb_context *rawfb,
+ const struct nk_vec2i *pnts, int count, const struct nk_color col)
+{
+ int i = 0;
+ #define MAX_POINTS 64
+ int left = 10000, top = 10000, bottom = 0, right = 0;
+ int nodes, nodeX[MAX_POINTS], pixelX, pixelY, j, swap ;
+
+ if (count == 0) return;
+ if (count > MAX_POINTS)
+ count = MAX_POINTS;
+
+ /* Get polygon dimensions */
+ for (i = 0; i < count; i++) {
+ if (left > pnts[i].x)
+ left = pnts[i].x;
+ if (right < pnts[i].x)
+ right = pnts[i].x;
+ if (top > pnts[i].y)
+ top = pnts[i].y;
+ if (bottom < pnts[i].y)
+ bottom = pnts[i].y;
+ } bottom++; right++;
+
+ /* Polygon scanline algorithm released under public-domain by Darel Rex Finley, 2007 */
+ /* Loop through the rows of the image. */
+ for (pixelY = top; pixelY < bottom; pixelY ++) {
+ nodes = 0; /* Build a list of nodes. */
+ j = count - 1;
+ for (i = 0; i < count; i++) {
+ if (((pnts[i].y < pixelY) && (pnts[j].y >= pixelY)) ||
+ ((pnts[j].y < pixelY) && (pnts[i].y >= pixelY))) {
+ nodeX[nodes++]= (int)((float)pnts[i].x
+ + ((float)pixelY - (float)pnts[i].y) / ((float)pnts[j].y - (float)pnts[i].y)
+ * ((float)pnts[j].x - (float)pnts[i].x));
+ } j = i;
+ }
+
+ /* Sort the nodes, via a simple “Bubble” sort. */
+ i = 0;
+ while (i < nodes - 1) {
+ if (nodeX[i] > nodeX[i+1]) {
+ swap = nodeX[i];
+ nodeX[i] = nodeX[i+1];
+ nodeX[i+1] = swap;
+ if (i) i--;
+ } else i++;
+ }
+ /* Fill the pixels between node pairs. */
+ for (i = 0; i < nodes; i += 2) {
+ if (nodeX[i+0] >= right) break;
+ if (nodeX[i+1] > left) {
+ if (nodeX[i+0] < left) nodeX[i+0] = left ;
+ if (nodeX[i+1] > right) nodeX[i+1] = right;
+ for (pixelX = nodeX[i]; pixelX < nodeX[i + 1]; pixelX++)
+ nk_rawfb_setpixel(rawfb, pixelX, pixelY, col);
+ }
+ }
+ }
+ #undef MAX_POINTS
+}
+
+static void
+nk_rawfb_stroke_arc(const struct rawfb_context *rawfb,
+ short x0, short y0, short w, short h, const short s,
+ const short line_thickness, const struct nk_color col)
+{
+ /* Bresenham's ellipses - modified to draw one quarter */
+ const int a2 = (w * w) / 4;
+ const int b2 = (h * h) / 4;
+ const int fa2 = 4 * a2, fb2 = 4 * b2;
+ int x, y, sigma;
+
+ if (s != 0 && s != 90 && s != 180 && s != 270) return;
+ if (w < 1 || h < 1) return;
+
+ /* Convert upper left to center */
+ h = (h + 1) / 2;
+ w = (w + 1) / 2;
+ x0 += w; y0 += h;
+
+ /* First half */
+ for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
+ if (s == 180)
+ nk_rawfb_setpixel(rawfb, x0 + x, y0 + y, col);
+ else if (s == 270)
+ nk_rawfb_setpixel(rawfb, x0 - x, y0 + y, col);
+ else if (s == 0)
+ nk_rawfb_setpixel(rawfb, x0 + x, y0 - y, col);
+ else if (s == 90)
+ nk_rawfb_setpixel(rawfb, x0 - x, y0 - y, col);
+ if (sigma >= 0) {
+ sigma += fa2 * (1 - y);
+ y--;
+ } sigma += b2 * ((4 * x) + 6);
+ }
+
+ /* Second half */
+ for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
+ if (s == 180)
+ nk_rawfb_setpixel(rawfb, x0 + x, y0 + y, col);
+ else if (s == 270)
+ nk_rawfb_setpixel(rawfb, x0 - x, y0 + y, col);
+ else if (s == 0)
+ nk_rawfb_setpixel(rawfb, x0 + x, y0 - y, col);
+ else if (s == 90)
+ nk_rawfb_setpixel(rawfb, x0 - x, y0 - y, col);
+ if (sigma >= 0) {
+ sigma += fb2 * (1 - x);
+ x--;
+ } sigma += a2 * ((4 * y) + 6);
+ }
+}
+
+static void
+nk_rawfb_fill_arc(const struct rawfb_context *rawfb, short x0, short y0,
+ short w, short h, const short s, const struct nk_color col)
+{
+ /* Bresenham's ellipses - modified to fill one quarter */
+ const int a2 = (w * w) / 4;
+ const int b2 = (h * h) / 4;
+ const int fa2 = 4 * a2, fb2 = 4 * b2;
+ int x, y, sigma;
+ struct nk_vec2i pnts[3];
+ if (w < 1 || h < 1) return;
+ if (s != 0 && s != 90 && s != 180 && s != 270)
+ return;
+
+ /* Convert upper left to center */
+ h = (h + 1) / 2;
+ w = (w + 1) / 2;
+ x0 += w;
+ y0 += h;
+
+ pnts[0].x = x0;
+ pnts[0].y = y0;
+ pnts[2].x = x0;
+ pnts[2].y = y0;
+
+ /* First half */
+ for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
+ if (s == 180) {
+ pnts[1].x = x0 + x; pnts[1].y = y0 + y;
+ } else if (s == 270) {
+ pnts[1].x = x0 - x; pnts[1].y = y0 + y;
+ } else if (s == 0) {
+ pnts[1].x = x0 + x; pnts[1].y = y0 - y;
+ } else if (s == 90) {
+ pnts[1].x = x0 - x; pnts[1].y = y0 - y;
+ }
+ nk_rawfb_fill_polygon(rawfb, pnts, 3, col);
+ pnts[2] = pnts[1];
+ if (sigma >= 0) {
+ sigma += fa2 * (1 - y);
+ y--;
+ } sigma += b2 * ((4 * x) + 6);
+ }
+
+ /* Second half */
+ for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
+ if (s == 180) {
+ pnts[1].x = x0 + x; pnts[1].y = y0 + y;
+ } else if (s == 270) {
+ pnts[1].x = x0 - x; pnts[1].y = y0 + y;
+ } else if (s == 0) {
+ pnts[1].x = x0 + x; pnts[1].y = y0 - y;
+ } else if (s == 90) {
+ pnts[1].x = x0 - x; pnts[1].y = y0 - y;
+ }
+ nk_rawfb_fill_polygon(rawfb, pnts, 3, col);
+ pnts[2] = pnts[1];
+ if (sigma >= 0) {
+ sigma += fb2 * (1 - x);
+ x--;
+ } sigma += a2 * ((4 * y) + 6);
+ }
+}
+
+static void
+nk_rawfb_stroke_rect(const struct rawfb_context *rawfb,
+ const short x, const short y, const short w, const short h,
+ const short r, const short line_thickness, const struct nk_color col)
+{
+ if (r == 0) {
+ nk_rawfb_stroke_line(rawfb, x, y, x + w, y, line_thickness, col);
+ nk_rawfb_stroke_line(rawfb, x, y + h, x + w, y + h, line_thickness, col);
+ nk_rawfb_stroke_line(rawfb, x, y, x, y + h, line_thickness, col);
+ nk_rawfb_stroke_line(rawfb, x + w, y, x + w, y + h, line_thickness, col);
+ } else {
+ const short xc = x + r;
+ const short yc = y + r;
+ const short wc = (short)(w - 2 * r);
+ const short hc = (short)(h - 2 * r);
+
+ nk_rawfb_stroke_line(rawfb, xc, y, xc + wc, y, line_thickness, col);
+ nk_rawfb_stroke_line(rawfb, x + w, yc, x + w, yc + hc, line_thickness, col);
+ nk_rawfb_stroke_line(rawfb, xc, y + h, xc + wc, y + h, line_thickness, col);
+ nk_rawfb_stroke_line(rawfb, x, yc, x, yc + hc, line_thickness, col);
+
+ nk_rawfb_stroke_arc(rawfb, xc + wc - r, y,
+ (unsigned)r*2, (unsigned)r*2, 0 , line_thickness, col);
+ nk_rawfb_stroke_arc(rawfb, x, y,
+ (unsigned)r*2, (unsigned)r*2, 90 , line_thickness, col);
+ nk_rawfb_stroke_arc(rawfb, x, yc + hc - r,
+ (unsigned)r*2, (unsigned)r*2, 270 , line_thickness, col);
+ nk_rawfb_stroke_arc(rawfb, xc + wc - r, yc + hc - r,
+ (unsigned)r*2, (unsigned)r*2, 180 , line_thickness, col);
+ }
+}
+
+static void
+nk_rawfb_fill_rect(const struct rawfb_context *rawfb,
+ const short x, const short y, const short w, const short h,
+ const short r, const struct nk_color col)
+{
+ int i;
+ if (r == 0) {
+ for (i = 0; i < h; i++)
+ nk_rawfb_stroke_line(rawfb, x, y + i, x + w, y + i, 1, col);
+ } else {
+ const short xc = x + r;
+ const short yc = y + r;
+ const short wc = (short)(w - 2 * r);
+ const short hc = (short)(h - 2 * r);
+
+ struct nk_vec2i pnts[12];
+ pnts[0].x = x;
+ pnts[0].y = yc;
+ pnts[1].x = xc;
+ pnts[1].y = yc;
+ pnts[2].x = xc;
+ pnts[2].y = y;
+
+ pnts[3].x = xc + wc;
+ pnts[3].y = y;
+ pnts[4].x = xc + wc;
+ pnts[4].y = yc;
+ pnts[5].x = x + w;
+ pnts[5].y = yc;
+
+ pnts[6].x = x + w;
+ pnts[6].y = yc + hc;
+ pnts[7].x = xc + wc;
+ pnts[7].y = yc + hc;
+ pnts[8].x = xc + wc;
+ pnts[8].y = y + h;
+
+ pnts[9].x = xc;
+ pnts[9].y = y + h;
+ pnts[10].x = xc;
+ pnts[10].y = yc + hc;
+ pnts[11].x = x;
+ pnts[11].y = yc + hc;
+
+ nk_rawfb_fill_polygon(rawfb, pnts, 12, col);
+
+ nk_rawfb_fill_arc(rawfb, xc + wc - r, y,
+ (unsigned)r*2, (unsigned)r*2, 0 , col);
+ nk_rawfb_fill_arc(rawfb, x, y,
+ (unsigned)r*2, (unsigned)r*2, 90 , col);
+ nk_rawfb_fill_arc(rawfb, x, yc + hc - r,
+ (unsigned)r*2, (unsigned)r*2, 270 , col);
+ nk_rawfb_fill_arc(rawfb, xc + wc - r, yc + hc - r,
+ (unsigned)r*2, (unsigned)r*2, 180 , col);
+ }
+}
+
+static void
+nk_rawfb_fill_triangle(const struct rawfb_context *rawfb,
+ const short x0, const short y0, const short x1, const short y1,
+ const short x2, const short y2, const struct nk_color col)
+{
+ struct nk_vec2i pnts[3];
+ pnts[0].x = x0;
+ pnts[0].y = y0;
+ pnts[1].x = x1;
+ pnts[1].y = y1;
+ pnts[2].x = x2;
+ pnts[2].y = y2;
+ nk_rawfb_fill_polygon(rawfb, pnts, 3, col);
+}
+
+static void
+nk_rawfb_stroke_triangle(const struct rawfb_context *rawfb,
+ const short x0, const short y0, const short x1, const short y1,
+ const short x2, const short y2, const unsigned short line_thickness,
+ const struct nk_color col)
+{
+ nk_rawfb_stroke_line(rawfb, x0, y0, x1, y1, line_thickness, col);
+ nk_rawfb_stroke_line(rawfb, x1, y1, x2, y2, line_thickness, col);
+ nk_rawfb_stroke_line(rawfb, x2, y2, x0, y0, line_thickness, col);
+}
+
+static void
+nk_rawfb_stroke_polygon(const struct rawfb_context *rawfb,
+ const struct nk_vec2i *pnts, const int count,
+ const unsigned short line_thickness, const struct nk_color col)
+{
+ int i;
+ for (i = 1; i < count; ++i)
+ nk_rawfb_stroke_line(rawfb, pnts[i-1].x, pnts[i-1].y, pnts[i].x,
+ pnts[i].y, line_thickness, col);
+ nk_rawfb_stroke_line(rawfb, pnts[count-1].x, pnts[count-1].y,
+ pnts[0].x, pnts[0].y, line_thickness, col);
+}
+
+static void
+nk_rawfb_stroke_polyline(const struct rawfb_context *rawfb,
+ const struct nk_vec2i *pnts, const int count,
+ const unsigned short line_thickness, const struct nk_color col)
+{
+ int i;
+ for (i = 0; i < count-1; ++i)
+ nk_rawfb_stroke_line(rawfb, pnts[i].x, pnts[i].y,
+ pnts[i+1].x, pnts[i+1].y, line_thickness, col);
+}
+
+static void
+nk_rawfb_fill_circle(const struct rawfb_context *rawfb,
+ short x0, short y0, short w, short h, const struct nk_color col)
+{
+ /* Bresenham's ellipses */
+ const int a2 = (w * w) / 4;
+ const int b2 = (h * h) / 4;
+ const int fa2 = 4 * a2, fb2 = 4 * b2;
+ int x, y, sigma;
+
+ /* Convert upper left to center */
+ h = (h + 1) / 2;
+ w = (w + 1) / 2;
+ x0 += w;
+ y0 += h;
+
+ /* First half */
+ for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
+ nk_rawfb_stroke_line(rawfb, x0 - x, y0 + y, x0 + x, y0 + y, 1, col);
+ nk_rawfb_stroke_line(rawfb, x0 - x, y0 - y, x0 + x, y0 - y, 1, col);
+ if (sigma >= 0) {
+ sigma += fa2 * (1 - y);
+ y--;
+ } sigma += b2 * ((4 * x) + 6);
+ }
+ /* Second half */
+ for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
+ nk_rawfb_stroke_line(rawfb, x0 - x, y0 + y, x0 + x, y0 + y, 1, col);
+ nk_rawfb_stroke_line(rawfb, x0 - x, y0 - y, x0 + x, y0 - y, 1, col);
+ if (sigma >= 0) {
+ sigma += fb2 * (1 - x);
+ x--;
+ } sigma += a2 * ((4 * y) + 6);
+ }
+}
+
+static void
+nk_rawfb_stroke_circle(const struct rawfb_context *rawfb,
+ short x0, short y0, short w, short h, const short line_thickness,
+ const struct nk_color col)
+{
+ /* Bresenham's ellipses */
+ const int a2 = (w * w) / 4;
+ const int b2 = (h * h) / 4;
+ const int fa2 = 4 * a2, fb2 = 4 * b2;
+ int x, y, sigma;
+
+ /* Convert upper left to center */
+ h = (h + 1) / 2;
+ w = (w + 1) / 2;
+ x0 += w;
+ y0 += h;
+
+ /* First half */
+ for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
+ nk_rawfb_setpixel(rawfb, x0 + x, y0 + y, col);
+ nk_rawfb_setpixel(rawfb, x0 - x, y0 + y, col);
+ nk_rawfb_setpixel(rawfb, x0 + x, y0 - y, col);
+ nk_rawfb_setpixel(rawfb, x0 - x, y0 - y, col);
+ if (sigma >= 0) {
+ sigma += fa2 * (1 - y);
+ y--;
+ } sigma += b2 * ((4 * x) + 6);
+ }
+ /* Second half */
+ for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
+ nk_rawfb_setpixel(rawfb, x0 + x, y0 + y, col);
+ nk_rawfb_setpixel(rawfb, x0 - x, y0 + y, col);
+ nk_rawfb_setpixel(rawfb, x0 + x, y0 - y, col);
+ nk_rawfb_setpixel(rawfb, x0 - x, y0 - y, col);
+ if (sigma >= 0) {
+ sigma += fb2 * (1 - x);
+ x--;
+ } sigma += a2 * ((4 * y) + 6);
+ }
+}
+
+static void
+nk_rawfb_stroke_curve(const struct rawfb_context *rawfb,
+ const struct nk_vec2i p1, const struct nk_vec2i p2,
+ const struct nk_vec2i p3, const struct nk_vec2i p4,
+ const unsigned int num_segments, const unsigned short line_thickness,
+ const struct nk_color col)
+{
+ unsigned int i_step, segments;
+ float t_step;
+ struct nk_vec2i last = p1;
+
+ segments = MAX(num_segments, 1);
+ t_step = 1.0f/(float)segments;
+ for (i_step = 1; i_step <= segments; ++i_step) {
+ float t = t_step * (float)i_step;
+ float u = 1.0f - t;
+ float w1 = u*u*u;
+ float w2 = 3*u*u*t;
+ float w3 = 3*u*t*t;
+ float w4 = t * t *t;
+ float x = w1 * p1.x + w2 * p2.x + w3 * p3.x + w4 * p4.x;
+ float y = w1 * p1.y + w2 * p2.y + w3 * p3.y + w4 * p4.y;
+ nk_rawfb_stroke_line(rawfb, last.x, last.y,
+ (short)x, (short)y, line_thickness,col);
+ last.x = (short)x; last.y = (short)y;
+ }
+}
+
+static void
+nk_rawfb_clear(const struct rawfb_context *rawfb, const struct nk_color col)
+{
+ nk_rawfb_fill_rect(rawfb, 0, 0, rawfb->fb.w, rawfb->fb.h, 0, col);
+}
+
+NK_API struct rawfb_context*
+nk_rawfb_init(void *fb, void *tex_mem, const unsigned int w, const unsigned int h,
+ const unsigned int pitch)
+{
+ const void *tex;
+ struct rawfb_context *rawfb;
+ rawfb = malloc(sizeof(struct rawfb_context));
+ if (!rawfb)
+ return NULL;
+
+ nk_memset(rawfb, 0, sizeof(struct rawfb_context));
+ rawfb->font_tex.pixels = tex_mem;
+ rawfb->font_tex.format = NK_FONT_ATLAS_ALPHA8;
+ rawfb->font_tex.w = rawfb->font_tex.h = 0;
+
+ rawfb->fb.pixels = fb;
+ rawfb->fb.w= w;
+ rawfb->fb.h = h;
+
+#if defined(RAWFB_XRGB_8888) || defined(RAWFB_RGBX_8888)
+ rawfb->fb.format = NK_FONT_ATLAS_RGBA32;
+ rawfb->fb.pitch = pitch;
+#else
+ #error Fixme
+#endif
+
+ nk_init_default(&rawfb->ctx, 0);
+ nk_font_atlas_init_default(&rawfb->atlas);
+ nk_font_atlas_begin(&rawfb->atlas);
+ tex = nk_font_atlas_bake(&rawfb->atlas, &rawfb->font_tex.w, &rawfb->font_tex.h, rawfb->font_tex.format);
+ if (!tex) return 0;
+
+ switch(rawfb->font_tex.format) {
+ case NK_FONT_ATLAS_ALPHA8:
+ rawfb->font_tex.pitch = rawfb->font_tex.w * 1;
+ break;
+ case NK_FONT_ATLAS_RGBA32:
+ rawfb->font_tex.pitch = rawfb->font_tex.w * 4;
+ break;
+ };
+ /* Store the font texture in tex scratch memory */
+ memcpy(rawfb->font_tex.pixels, tex, rawfb->font_tex.pitch * rawfb->font_tex.h);
+ nk_font_atlas_end(&rawfb->atlas, nk_handle_ptr(NULL), NULL);
+ if (rawfb->atlas.default_font)
+ nk_style_set_font(&rawfb->ctx, &rawfb->atlas.default_font->handle);
+ nk_style_load_all_cursors(&rawfb->ctx, rawfb->atlas.cursors);
+ nk_rawfb_scissor(rawfb, 0, 0, rawfb->fb.w, rawfb->fb.h);
+ return rawfb;
+}
+
+static void
+nk_rawfb_stretch_image(const struct rawfb_image *dst,
+ const struct rawfb_image *src, const struct nk_rect *dst_rect,
+ const struct nk_rect *src_rect, const struct nk_rect *dst_scissors)
+{
+ short i, j;
+ struct nk_color col;
+ float xinc = src_rect->w / dst_rect->w;
+ float yinc = src_rect->h / dst_rect->h;
+ float xoff = src_rect->x, yoff = src_rect->y;
+
+ /* Simple nearest filtering rescaling */
+ /* TODO: use bilinear filter */
+ for (j = 0; j < (short)dst_rect->h; j++) {
+ for (i = 0; i < (short)dst_rect->w; i++) {
+ if (dst_scissors) {
+ if (i + (int)(dst_rect->x + 0.5f) < dst_scissors->x || i + (int)(dst_rect->x + 0.5f) >= dst_scissors->w)
+ continue;
+ if (j + (int)(dst_rect->y + 0.5f) < dst_scissors->y || j + (int)(dst_rect->y + 0.5f) >= dst_scissors->h)
+ continue;
+ }
+ col = nk_image_getpixel(src, (int)xoff, (int) yoff);
+ nk_image_blendpixel(dst, i + (int)(dst_rect->x + 0.5f), j + (int)(dst_rect->y + 0.5f), col);
+ xoff += xinc;
+ }
+ xoff = src_rect->x;
+ yoff += yinc;
+ }
+}
+
+static void
+nk_rawfb_font_query_font_glyph(nk_handle handle, const float height,
+ struct nk_user_font_glyph *glyph, const nk_rune codepoint,
+ const nk_rune next_codepoint)
+{
+ float scale;
+ const struct nk_font_glyph *g;
+ struct nk_font *font;
+ NK_ASSERT(glyph);
+ NK_UNUSED(next_codepoint);
+
+ font = (struct nk_font*)handle.ptr;
+ NK_ASSERT(font);
+ NK_ASSERT(font->glyphs);
+ if (!font || !glyph)
+ return;
+
+ scale = height/font->info.height;
+ g = nk_font_find_glyph(font, codepoint);
+ glyph->width = (g->x1 - g->x0) * scale;
+ glyph->height = (g->y1 - g->y0) * scale;
+ glyph->offset = nk_vec2(g->x0 * scale, g->y0 * scale);
+ glyph->xadvance = (g->xadvance * scale);
+ glyph->uv[0] = nk_vec2(g->u0, g->v0);
+ glyph->uv[1] = nk_vec2(g->u1, g->v1);
+}
+
+NK_API void
+nk_rawfb_draw_text(const struct rawfb_context *rawfb,
+ const struct nk_user_font *font, const struct nk_rect rect,
+ const char *text, const int len, const float font_height,
+ const struct nk_color fg)
+{
+ float x = 0;
+ int text_len = 0;
+ nk_rune unicode = 0;
+ nk_rune next = 0;
+ int glyph_len = 0;
+ int next_glyph_len = 0;
+ struct nk_user_font_glyph g;
+ if (!len || !text) return;
+
+ x = 0;
+ glyph_len = nk_utf_decode(text, &unicode, len);
+ if (!glyph_len) return;
+
+ /* draw every glyph image */
+ while (text_len < len && glyph_len) {
+ struct nk_rect src_rect;
+ struct nk_rect dst_rect;
+ float char_width = 0;
+ if (unicode == NK_UTF_INVALID) break;
+
+ /* query currently drawn glyph information */
+ next_glyph_len = nk_utf_decode(text + text_len + glyph_len, &next, (int)len - text_len);
+ nk_rawfb_font_query_font_glyph(font->userdata, font_height, &g, unicode,
+ (next == NK_UTF_INVALID) ? '\0' : next);
+
+ /* calculate and draw glyph drawing rectangle and image */
+ char_width = g.xadvance;
+ src_rect.x = g.uv[0].x * rawfb->font_tex.w;
+ src_rect.y = g.uv[0].y * rawfb->font_tex.h;
+ src_rect.w = g.uv[1].x * rawfb->font_tex.w - g.uv[0].x * rawfb->font_tex.w;
+ src_rect.h = g.uv[1].y * rawfb->font_tex.h - g.uv[0].y * rawfb->font_tex.h;
+
+ dst_rect.x = x + g.offset.x + rect.x;
+ dst_rect.y = g.offset.y + rect.y;
+ dst_rect.w = ceilf(g.width);
+ dst_rect.h = ceilf(g.height);
+
+ /* TODO: account fg */
+ /* Use software rescaling to blit glyph from font_text to framebuffer */
+ nk_rawfb_stretch_image(&rawfb->fb, &rawfb->font_tex, &dst_rect, &src_rect, &rawfb->scissors);
+
+ /* offset next glyph */
+ text_len += glyph_len;
+ x += char_width;
+ glyph_len = next_glyph_len;
+ unicode = next;
+ }
+}
+
+NK_API void
+nk_rawfb_drawimage(const struct rawfb_context *rawfb,
+ const int x, const int y, const int w, const int h,
+ const struct nk_image *img, const struct nk_color *col)
+{
+ struct nk_rect src_rect;
+ struct nk_rect dst_rect;
+
+ src_rect.x = img->region[0];
+ src_rect.y = img->region[1];
+ src_rect.w = img->region[2];
+ src_rect.h = img->region[3];
+
+ dst_rect.x = x;
+ dst_rect.y = y;
+ dst_rect.w = w;
+ dst_rect.h = h;
+ nk_rawfb_stretch_image(&rawfb->fb, &rawfb->font_tex, &dst_rect, &src_rect, &rawfb->scissors);
+}
+
+NK_API void
+nk_rawfb_shutdown(struct rawfb_context *rawfb)
+{
+ nk_free(&rawfb->ctx);
+ nk_memset(rawfb, 0, sizeof(struct rawfb_context));
+ free(rawfb);
+}
+
+NK_API void
+nk_rawfb_resize_fb(struct rawfb_context *rawfb,
+ void *fb,
+ const unsigned int w,
+ const unsigned int h,
+ const unsigned int pitch)
+{
+ rawfb->fb.w = w;
+ rawfb->fb.h = h;
+ rawfb->fb.pixels = fb;
+ rawfb->fb.pitch = pitch;
+}
+
+NK_API void
+nk_rawfb_render(const struct rawfb_context *rawfb,
+ const struct nk_color clear,
+ const unsigned char enable_clear)
+{
+ const struct nk_command *cmd;
+ if (enable_clear)
+ nk_rawfb_clear(rawfb, clear);
+
+ nk_foreach(cmd, (struct nk_context*)&rawfb->ctx) {
+ switch (cmd->type) {
+ case NK_COMMAND_NOP: break;
+ case NK_COMMAND_SCISSOR: {
+ const struct nk_command_scissor *s =(const struct nk_command_scissor*)cmd;
+ nk_rawfb_scissor((struct rawfb_context *)rawfb, s->x, s->y, s->w, s->h);
+ } break;
+ case NK_COMMAND_LINE: {
+ const struct nk_command_line *l = (const struct nk_command_line *)cmd;
+ nk_rawfb_stroke_line(rawfb, l->begin.x, l->begin.y, l->end.x,
+ l->end.y, l->line_thickness, l->color);
+ } break;
+ case NK_COMMAND_RECT: {
+ const struct nk_command_rect *r = (const struct nk_command_rect *)cmd;
+ nk_rawfb_stroke_rect(rawfb, r->x, r->y, r->w, r->h,
+ (unsigned short)r->rounding, r->line_thickness, r->color);
+ } break;
+ case NK_COMMAND_RECT_FILLED: {
+ const struct nk_command_rect_filled *r = (const struct nk_command_rect_filled *)cmd;
+ nk_rawfb_fill_rect(rawfb, r->x, r->y, r->w, r->h,
+ (unsigned short)r->rounding, r->color);
+ } break;
+ case NK_COMMAND_CIRCLE: {
+ const struct nk_command_circle *c = (const struct nk_command_circle *)cmd;
+ nk_rawfb_stroke_circle(rawfb, c->x, c->y, c->w, c->h, c->line_thickness, c->color);
+ } break;
+ case NK_COMMAND_CIRCLE_FILLED: {
+ const struct nk_command_circle_filled *c = (const struct nk_command_circle_filled *)cmd;
+ nk_rawfb_fill_circle(rawfb, c->x, c->y, c->w, c->h, c->color);
+ } break;
+ case NK_COMMAND_TRIANGLE: {
+ const struct nk_command_triangle*t = (const struct nk_command_triangle*)cmd;
+ nk_rawfb_stroke_triangle(rawfb, t->a.x, t->a.y, t->b.x, t->b.y,
+ t->c.x, t->c.y, t->line_thickness, t->color);
+ } break;
+ case NK_COMMAND_TRIANGLE_FILLED: {
+ const struct nk_command_triangle_filled *t = (const struct nk_command_triangle_filled *)cmd;
+ nk_rawfb_fill_triangle(rawfb, t->a.x, t->a.y, t->b.x, t->b.y,
+ t->c.x, t->c.y, t->color);
+ } break;
+ case NK_COMMAND_POLYGON: {
+ const struct nk_command_polygon *p =(const struct nk_command_polygon*)cmd;
+ nk_rawfb_stroke_polygon(rawfb, p->points, p->point_count, p->line_thickness,p->color);
+ } break;
+ case NK_COMMAND_POLYGON_FILLED: {
+ const struct nk_command_polygon_filled *p = (const struct nk_command_polygon_filled *)cmd;
+ nk_rawfb_fill_polygon(rawfb, p->points, p->point_count, p->color);
+ } break;
+ case NK_COMMAND_POLYLINE: {
+ const struct nk_command_polyline *p = (const struct nk_command_polyline *)cmd;
+ nk_rawfb_stroke_polyline(rawfb, p->points, p->point_count, p->line_thickness, p->color);
+ } break;
+ case NK_COMMAND_TEXT: {
+ const struct nk_command_text *t = (const struct nk_command_text*)cmd;
+ nk_rawfb_draw_text(rawfb, t->font, nk_rect(t->x, t->y, t->w, t->h),
+ t->string, t->length, t->height, t->foreground);
+ } break;
+ case NK_COMMAND_CURVE: {
+ const struct nk_command_curve *q = (const struct nk_command_curve *)cmd;
+ nk_rawfb_stroke_curve(rawfb, q->begin, q->ctrl[0], q->ctrl[1],
+ q->end, 22, q->line_thickness, q->color);
+ } break;
+ case NK_COMMAND_RECT_MULTI_COLOR:
+ case NK_COMMAND_IMAGE: {
+ const struct nk_command_image *q = (const struct nk_command_image *)cmd;
+ nk_rawfb_drawimage(rawfb, q->x, q->y, q->w, q->h, &q->img, &q->col);
+ } break;
+ case NK_COMMAND_ARC: {
+ assert(0 && "NK_COMMAND_ARC not implemented\n");
+ } break;
+ case NK_COMMAND_ARC_FILLED: {
+ assert(0 && "NK_COMMAND_ARC_FILLED not implemented\n");
+ } break;
+ default: break;
+ }
+ } nk_clear((struct nk_context*)&rawfb->ctx);
+}
+#endif
+