- Implement text foreground color
- Be consistent about reading and writing pixel values to avoid casting/offset madness - clean up function names for clarity/consistency - Fix fence post errors preventing get/set pixels from operating on first row/column - Enforce mutual exclusivity for pixel layout macros
This commit is contained in:
0x0203
parent
bbc8c925dc
commit
6d24023d98
@ -35,7 +35,7 @@
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#include <unistd.h>
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#include <time.h>
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#define RAWFB_RGBX_8888
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#define RAWFB_XRGB_8888
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#define NK_INCLUDE_FIXED_TYPES
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#define NK_INCLUDE_STANDARD_IO
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#define NK_INCLUDE_STANDARD_VARARGS
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@ -70,26 +70,50 @@ struct rawfb_context {
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#endif
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static unsigned int
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nk_color_from_byte(const nk_byte *c)
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nk_rawfb_color2int(const struct nk_color c)
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{
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unsigned int res = 0;
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#if defined(RAWFB_RGBX_8888)
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res |= (unsigned int)c[0] << 16;
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res |= (unsigned int)c[1] << 8;
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res |= (unsigned int)c[2] << 0;
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#elif defined(RAWFB_XRGB_8888)
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res = ((unsigned int *)c)[0];
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#if defined(RAWFB_RGBX_8888) && !defined(RAWFB_XRGB_8888)
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res |= c.r << 24;
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res |= c.g << 16;
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res |= c.b << 8;
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res |= c.a;
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#elif defined(RAWFB_XRGB_8888) && !defined(RAWFB_RGBX_8888)
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res |= c.a << 24;
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res |= c.r << 16;
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res |= c.g << 8;
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res |= c.b << 0;
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#else
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#error Define one of RAWFB_RGBX_8888 , RAWFB_XRGB_8888
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#endif
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return (res);
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}
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static struct nk_color
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nk_rawfb_int2color(const unsigned int i)
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{
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struct nk_color col;
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#if defined(RAWFB_RGBX_8888) && !defined(RAWFB_XRGB_8888)
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col.r = (i >> 24) & 0xff;
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col.g = (i >> 16) & 0xff;
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col.b = (i >> 8) & 0xff;
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col.a = (i >> 0) & 0xff;
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#elif defined(RAWFB_XRGB_8888) && !defined(RAWFB_RGBX_8888)
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col.a = (i >> 24) & 0xff;
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col.r = (i >> 16) & 0xff;
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col.g = (i >> 8) & 0xff;
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col.b = (i >> 0) & 0xff;
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#else
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#error Define one of RAWFB_RGBX_8888 , RAWFB_XRGB_8888
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#endif
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return col;
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}
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static void
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nk_rawfb_setpixel(const struct rawfb_context *rawfb,
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nk_rawfb_ctx_setpixel(const struct rawfb_context *rawfb,
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const short x0, const short y0, const struct nk_color col)
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{
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unsigned int c = nk_color_from_byte(&col.r);
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unsigned int c = nk_rawfb_color2int(col);
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unsigned char *pixels = rawfb->fb.pixels;
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unsigned int *ptr;
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@ -120,7 +144,7 @@ nk_rawfb_line_horizontal(const struct rawfb_context *rawfb,
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n = x1 - x0;
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for (i = 0; i < sizeof(c) / sizeof(c[0]); i++)
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c[i] = nk_color_from_byte(&col.r);
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c[i] = nk_rawfb_color2int(col);
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while (n > 16) {
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memcpy((void *)ptr, c, sizeof(c));
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@ -130,44 +154,49 @@ nk_rawfb_line_horizontal(const struct rawfb_context *rawfb,
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}
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static void
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nk_rawfb_imagesetpixel(const struct rawfb_image *img,
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nk_rawfb_img_setpixel(const struct rawfb_image *img,
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const int x0, const int y0, const struct nk_color col)
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{
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unsigned int c = nk_rawfb_color2int(col);
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unsigned char *ptr;
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unsigned int *pixel;
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NK_ASSERT(img);
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if (y0 < img->h && y0 > 0 && x0 > 0 && x0 < img->w) {
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if (y0 < img->h && y0 >= 0 && x0 >= 0 && x0 < img->w) {
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ptr = img->pixels;
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ptr += img->pitch * y0;
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pixel = (unsigned int *)ptr;
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if (img->format == NK_FONT_ATLAS_ALPHA8) {
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ptr += img->pitch * y0;
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ptr[x0] = col.a;
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} else {
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ptr += img->pitch * y0;
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((struct nk_color *)ptr)[x0] = col;
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pixel[x0] = c;
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}
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}
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}
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static struct nk_color
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nk_image_getpixel(const struct rawfb_image *img, const int x0, const int y0)
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nk_rawfb_img_getpixel(const struct rawfb_image *img, const int x0, const int y0)
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{
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struct nk_color col = {0, 0, 0, 0};
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unsigned char *ptr;
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unsigned int *pixel;
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NK_ASSERT(img);
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if (y0 < img->h && y0 > 0 && x0 > 0 && x0 < img->w) {
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if (y0 < img->h && y0 >= 0 && x0 >= 0 && x0 < img->w) {
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ptr = img->pixels;
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ptr += img->pitch * y0;
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if (img->format == NK_FONT_ATLAS_ALPHA8) {
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ptr += img->pitch * y0;
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col.a = ptr[x0];
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col.b = col.g = col.r = 0xff;
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} else {
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ptr += img->pitch * y0;
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col = ((struct nk_color *)ptr)[x0];
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pixel = ptr;
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pixel += x0;
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col = nk_rawfb_int2color(*pixel);
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}
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} return col;
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}
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static void
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nk_image_blendpixel(const struct rawfb_image *img,
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nk_rawfb_img_blendpixel(const struct rawfb_image *img,
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const int x0, const int y0, struct nk_color col)
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{
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struct nk_color col2;
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@ -176,11 +205,11 @@ nk_image_blendpixel(const struct rawfb_image *img,
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return;
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inv_a = 0xff - col.a;
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col2 = nk_image_getpixel(img, x0, y0);
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col2 = nk_rawfb_img_getpixel(img, x0, y0);
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col.r = (col.r * col.a + col2.r * inv_a) >> 8;
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col.g = (col.g * col.a + col2.g * inv_a) >> 8;
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col.b = (col.b * col.a + col2.b * inv_a) >> 8;
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nk_rawfb_imagesetpixel(img, x0, y0, col);
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nk_rawfb_img_setpixel(img, x0, y0, col);
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}
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static void
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@ -238,7 +267,7 @@ nk_rawfb_stroke_line(const struct rawfb_context *rawfb,
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dy <<= 1;
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dx <<= 1;
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nk_rawfb_setpixel(rawfb, x0, y0, col);
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nk_rawfb_ctx_setpixel(rawfb, x0, y0, col);
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if (dx > dy) {
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int fraction = dy - (dx >> 1);
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while (x0 != x1) {
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@ -248,7 +277,7 @@ nk_rawfb_stroke_line(const struct rawfb_context *rawfb,
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}
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x0 += stepx;
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fraction += dy;
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nk_rawfb_setpixel(rawfb, x0, y0, col);
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nk_rawfb_ctx_setpixel(rawfb, x0, y0, col);
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}
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} else {
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int fraction = dx - (dy >> 1);
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@ -259,7 +288,7 @@ nk_rawfb_stroke_line(const struct rawfb_context *rawfb,
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}
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y0 += stepy;
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fraction += dx;
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nk_rawfb_setpixel(rawfb, x0, y0, col);
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nk_rawfb_ctx_setpixel(rawfb, x0, y0, col);
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}
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}
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}
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@ -320,7 +349,7 @@ nk_rawfb_fill_polygon(const struct rawfb_context *rawfb,
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if (nodeX[i+0] < left) nodeX[i+0] = left ;
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if (nodeX[i+1] > right) nodeX[i+1] = right;
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for (pixelX = nodeX[i]; pixelX < nodeX[i + 1]; pixelX++)
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nk_rawfb_setpixel(rawfb, pixelX, pixelY, col);
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nk_rawfb_ctx_setpixel(rawfb, pixelX, pixelY, col);
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}
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}
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}
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@ -349,13 +378,13 @@ nk_rawfb_stroke_arc(const struct rawfb_context *rawfb,
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/* First half */
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for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
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if (s == 180)
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nk_rawfb_setpixel(rawfb, x0 + x, y0 + y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 + x, y0 + y, col);
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else if (s == 270)
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nk_rawfb_setpixel(rawfb, x0 - x, y0 + y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 - x, y0 + y, col);
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else if (s == 0)
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nk_rawfb_setpixel(rawfb, x0 + x, y0 - y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 + x, y0 - y, col);
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else if (s == 90)
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nk_rawfb_setpixel(rawfb, x0 - x, y0 - y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 - x, y0 - y, col);
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if (sigma >= 0) {
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sigma += fa2 * (1 - y);
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y--;
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@ -365,13 +394,13 @@ nk_rawfb_stroke_arc(const struct rawfb_context *rawfb,
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/* Second half */
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for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
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if (s == 180)
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nk_rawfb_setpixel(rawfb, x0 + x, y0 + y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 + x, y0 + y, col);
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else if (s == 270)
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nk_rawfb_setpixel(rawfb, x0 - x, y0 + y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 - x, y0 + y, col);
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else if (s == 0)
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nk_rawfb_setpixel(rawfb, x0 + x, y0 - y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 + x, y0 - y, col);
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else if (s == 90)
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nk_rawfb_setpixel(rawfb, x0 - x, y0 - y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 - x, y0 - y, col);
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if (sigma >= 0) {
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sigma += fb2 * (1 - x);
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x--;
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@ -637,10 +666,10 @@ nk_rawfb_stroke_circle(const struct rawfb_context *rawfb,
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/* First half */
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for (x = 0, y = h, sigma = 2*b2+a2*(1-2*h); b2*x <= a2*y; x++) {
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nk_rawfb_setpixel(rawfb, x0 + x, y0 + y, col);
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nk_rawfb_setpixel(rawfb, x0 - x, y0 + y, col);
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nk_rawfb_setpixel(rawfb, x0 + x, y0 - y, col);
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nk_rawfb_setpixel(rawfb, x0 - x, y0 - y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 + x, y0 + y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 - x, y0 + y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 + x, y0 - y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 - x, y0 - y, col);
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if (sigma >= 0) {
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sigma += fa2 * (1 - y);
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y--;
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@ -648,10 +677,10 @@ nk_rawfb_stroke_circle(const struct rawfb_context *rawfb,
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}
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/* Second half */
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for (x = w, y = 0, sigma = 2*a2+b2*(1-2*w); a2*y <= b2*x; y++) {
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nk_rawfb_setpixel(rawfb, x0 + x, y0 + y, col);
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nk_rawfb_setpixel(rawfb, x0 - x, y0 + y, col);
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nk_rawfb_setpixel(rawfb, x0 + x, y0 - y, col);
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nk_rawfb_setpixel(rawfb, x0 - x, y0 - y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 + x, y0 + y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 - x, y0 + y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 + x, y0 - y, col);
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nk_rawfb_ctx_setpixel(rawfb, x0 - x, y0 - y, col);
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if (sigma >= 0) {
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sigma += fb2 * (1 - x);
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x--;
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@ -746,7 +775,8 @@ nk_rawfb_init(void *fb, void *tex_mem, const unsigned int w, const unsigned int
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static void
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nk_rawfb_stretch_image(const struct rawfb_image *dst,
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const struct rawfb_image *src, const struct nk_rect *dst_rect,
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const struct nk_rect *src_rect, const struct nk_rect *dst_scissors)
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const struct nk_rect *src_rect, const struct nk_rect *dst_scissors,
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const struct nk_color *fg)
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{
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short i, j;
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struct nk_color col;
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@ -764,8 +794,14 @@ nk_rawfb_stretch_image(const struct rawfb_image *dst,
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if (j + (int)(dst_rect->y + 0.5f) < dst_scissors->y || j + (int)(dst_rect->y + 0.5f) >= dst_scissors->h)
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continue;
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}
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col = nk_image_getpixel(src, (int)xoff, (int) yoff);
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nk_image_blendpixel(dst, i + (int)(dst_rect->x + 0.5f), j + (int)(dst_rect->y + 0.5f), col);
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col = nk_rawfb_img_getpixel(src, (int)xoff, (int) yoff);
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if (col.r || col.g || col.b)
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{
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col.r = fg->r;
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col.g = fg->g;
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col.b = fg->b;
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}
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nk_rawfb_img_blendpixel(dst, i + (int)(dst_rect->x + 0.5f), j + (int)(dst_rect->y + 0.5f), col);
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xoff += xinc;
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}
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xoff = src_rect->x;
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@ -843,9 +879,8 @@ nk_rawfb_draw_text(const struct rawfb_context *rawfb,
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dst_rect.w = ceilf(g.width);
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dst_rect.h = ceilf(g.height);
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/* TODO: account fg */
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/* Use software rescaling to blit glyph from font_text to framebuffer */
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nk_rawfb_stretch_image(&rawfb->fb, &rawfb->font_tex, &dst_rect, &src_rect, &rawfb->scissors);
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nk_rawfb_stretch_image(&rawfb->fb, &rawfb->font_tex, &dst_rect, &src_rect, &rawfb->scissors, &fg);
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/* offset next glyph */
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text_len += glyph_len;
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@ -872,7 +907,7 @@ nk_rawfb_drawimage(const struct rawfb_context *rawfb,
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dst_rect.y = y;
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dst_rect.w = w;
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dst_rect.h = h;
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nk_rawfb_stretch_image(&rawfb->fb, &rawfb->font_tex, &dst_rect, &src_rect, &rawfb->scissors);
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nk_rawfb_stretch_image(&rawfb->fb, &rawfb->font_tex, &dst_rect, &src_rect, &rawfb->scissors, col);
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}
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NK_API void
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