Mercurial > repos > blastem
view nuklear_ui/nuklear_rawfb.h @ 2149:9209858b2f74
Fix a couple of bugs in the TOC file parser
author | Michael Pavone <pavone@retrodev.com> |
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date | Sat, 26 Mar 2022 23:05:08 -0700 |
parents | 56a1171e29b9 |
children |
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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, struct nk_context *context, 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, struct nk_context *context, const unsigned int w, const unsigned int h, const unsigned int pitch) { 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.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 rawfb->ctx = context; nk_rawfb_scissor(rawfb, 0, 0, rawfb->fb.w, rawfb->fb.h); return rawfb; } NK_API void nk_rawfb_font_stash_begin(struct rawfb_context *rawfb, struct nk_font_atlas **atlas) { nk_font_atlas_init_default(&rawfb->atlas); nk_font_atlas_begin(&rawfb->atlas); *atlas = &rawfb->atlas; } NK_API void nk_rawfb_font_stash_end(struct rawfb_context *rawfb) { const void *tex; tex = nk_font_atlas_bake(&rawfb->atlas, &rawfb->font_tex.w, &rawfb->font_tex.h, rawfb->font_tex.format); if (!tex) return; 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 */ rawfb->font_tex.pixels = malloc(rawfb->font_tex.pitch * rawfb->font_tex.h); 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); } 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; const struct rawfb_image *rfb_img = img->handle.ptr; if (!rfb_img) { rfb_img = &rawfb->font_tex; } src_rect.x = img->region[0]; src_rect.y = img->region[1]; if (nk_image_is_subimage(img)) { src_rect.w = img->region[2]; src_rect.h = img->region[3]; } else { src_rect.w = rfb_img->w; src_rect.h = rfb_img->h; } dst_rect.x = x; dst_rect.y = y; dst_rect.w = w; dst_rect.h = h; nk_rawfb_stretch_image(&rawfb->fb, rfb_img, &dst_rect, &src_rect, &rawfb->scissors); } NK_API void nk_rawfb_shutdown(struct rawfb_context *rawfb) { 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, 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(rawfb->ctx); } #endif