Alessandro Ros
3 years ago
committed by
GitHub
22 changed files with 8993 additions and 159 deletions
@ -0,0 +1,87 @@ |
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#include <stddef.h> |
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#include <stdint.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include "base64.h" |
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static const unsigned char decoding_table[256] = { |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x3e, 0x00, 0x00, 0x00, 0x3f, |
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0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, |
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0x3c, 0x3d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, |
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0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, |
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0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, |
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0x17, 0x18, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, |
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0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, |
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0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, |
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0x31, 0x32, 0x33, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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}; |
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char* base64_decode(const char *data) { |
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size_t input_length = strlen(data); |
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if (input_length % 4 != 0) { |
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return NULL; |
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} |
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size_t output_length = input_length / 4 * 3; |
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if (data[input_length - 1] == '=') { |
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(output_length)--; |
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} |
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if (data[input_length - 2] == '=') { |
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(output_length)--; |
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} |
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unsigned char* output = (unsigned char *)malloc(output_length + 1); |
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if (output == NULL) { |
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return NULL; |
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} |
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for (int i = 0, j = 0; i < (int)input_length;) { |
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uint32_t sextet_a = (data[i] == '=') ? (0 & i++) : decoding_table[(unsigned char)(data[i++])]; |
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uint32_t sextet_b = (data[i] == '=') ? (0 & i++) : decoding_table[(unsigned char)(data[i++])]; |
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uint32_t sextet_c = (data[i] == '=') ? (0 & i++) : decoding_table[(unsigned char)(data[i++])]; |
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uint32_t sextet_d = (data[i] == '=') ? (0 & i++) : decoding_table[(unsigned char)(data[i++])]; |
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uint32_t triple = (sextet_a << 3 * 6) |
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+ (sextet_b << 2 * 6) |
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+ (sextet_c << 1 * 6) |
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+ (sextet_d << 0 * 6); |
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if (j < (int)output_length) { |
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output[j++] = (triple >> 2 * 8) & 0xFF; |
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} |
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if (j < (int)output_length) { |
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output[j++] = (triple >> 1 * 8) & 0xFF; |
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} |
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if (j < (int)output_length) { |
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output[j++] = (triple >> 0 * 8) & 0xFF; |
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} |
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} |
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output[output_length] = 0x00; |
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return (char *)output; |
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}; |
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@ -0,0 +1,6 @@ |
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#ifndef __BASE64_H__ |
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#define __BASE64_H__ |
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char* base64_decode(const char *data); |
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#endif |
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@ -0,0 +1,171 @@ |
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#include <time.h> |
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#include <ft2build.h> |
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#include FT_FREETYPE_H |
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#include "text_font.h" |
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#include "text.h" |
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static char errbuf[256]; |
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static void set_error(const char *format, ...) { |
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va_list args; |
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va_start(args, format); |
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vsnprintf(errbuf, 256, format, args); |
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} |
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const char *text_get_error() { |
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return errbuf; |
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} |
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typedef struct { |
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bool enabled; |
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char *text_overlay; |
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FT_Library library; |
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FT_Face face; |
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} text_priv_t; |
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bool text_create(const parameters_t *params, text_t **text) { |
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*text = malloc(sizeof(text_priv_t)); |
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text_priv_t *textp = (text_priv_t *)(*text); |
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memset(textp, 0, sizeof(text_priv_t)); |
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textp->enabled = params->text_overlay_enable; |
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textp->text_overlay = strdup(params->text_overlay); |
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if (textp->enabled) { |
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int error = FT_Init_FreeType(&textp->library); |
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if (error) { |
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set_error("FT_Init_FreeType() failed"); |
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goto failed; |
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} |
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error = FT_New_Memory_Face( |
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textp->library, |
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IBMPlexMono_Medium, |
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sizeof(IBMPlexMono_Medium), |
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0, |
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&textp->face); |
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if (error) { |
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set_error("FT_New_Memory_Face() failed"); |
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goto failed; |
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} |
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error = FT_Set_Pixel_Sizes( |
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textp->face, |
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25, |
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25); |
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if (error) { |
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set_error("FT_Set_Pixel_Sizes() failed"); |
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goto failed; |
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} |
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} |
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return true; |
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failed: |
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free(textp); |
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return false; |
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} |
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static void draw_rect(uint8_t *buf, int stride, int height, int x, int y, unsigned int rect_width, unsigned int rect_height) { |
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uint8_t *Y = buf; |
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uint8_t *U = Y + stride * height; |
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uint8_t *V = U + (stride / 2) * (height / 2); |
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const uint8_t color[3] = {0, 128, 128}; |
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uint32_t opacity = 45; |
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for (unsigned int src_y = 0; src_y < rect_height; src_y++) { |
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for (unsigned int src_x = 0; src_x < rect_width; src_x++) { |
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unsigned int dest_x = x + src_x; |
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unsigned int dest_y = y + src_y; |
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int i1 = dest_y*stride + dest_x; |
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int i2 = dest_y/2*stride/2 + dest_x/2; |
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Y[i1] = ((color[0] * opacity) + (uint32_t)Y[i1] * (255 - opacity)) / 255; |
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U[i2] = ((color[1] * opacity) + (uint32_t)U[i2] * (255 - opacity)) / 255; |
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V[i2] = ((color[2] * opacity) + (uint32_t)V[i2] * (255 - opacity)) / 255; |
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} |
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} |
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} |
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static void draw_bitmap(uint8_t *buf, int stride, int height, const FT_Bitmap *bitmap, int x, int y) { |
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uint8_t *Y = buf; |
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uint8_t *U = Y + stride * height; |
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uint8_t *V = U + (stride / 2) * (height / 2); |
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for (unsigned int src_y = 0; src_y < bitmap->rows; src_y++) { |
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for (unsigned int src_x = 0; src_x < bitmap->width; src_x++) { |
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uint8_t v = bitmap->buffer[src_y*bitmap->pitch + src_x]; |
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if (v != 0) { |
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unsigned int dest_x = x + src_x; |
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unsigned int dest_y = y + src_y; |
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int i1 = dest_y*stride + dest_x; |
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int i2 = dest_y/2*stride/2 + dest_x/2; |
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uint32_t opacity = (uint32_t)v; |
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Y[i1] = (uint8_t)(((uint32_t)v * opacity + (uint32_t)Y[i1] * (255 - opacity)) / 255); |
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U[i2] = (uint8_t)((128 * opacity + (uint32_t)U[i2] * (255 - opacity)) / 255); |
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V[i2] = (uint8_t)((128 * opacity + (uint32_t)V[i2] * (255 - opacity)) / 255); |
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} |
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} |
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} |
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} |
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static int get_text_width(FT_Face face, const char *text) { |
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int ret = 0; |
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for (const char *ptr = text; *ptr != 0x00; ptr++) { |
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int error = FT_Load_Char(face, *ptr, FT_LOAD_RENDER); |
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if (error) { |
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continue; |
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} |
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ret += face->glyph->advance.x >> 6; |
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} |
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return ret; |
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} |
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void text_draw(text_t *text, uint8_t *buf, int stride, int height) { |
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text_priv_t *textp = (text_priv_t *)text; |
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if (textp->enabled) { |
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time_t timer = time(NULL); |
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struct tm *tm_info = localtime(&timer); |
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char buffer[255]; |
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memset(buffer, 0, sizeof(buffer)); |
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strftime(buffer, 255, textp->text_overlay, tm_info); |
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draw_rect( |
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buf, |
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stride, |
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height, |
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7, |
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7, |
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get_text_width(textp->face, buffer) + 10, |
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34); |
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int x = 12; |
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int y = 33; |
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for (const char *ptr = buffer; *ptr != 0x00; ptr++) { |
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int error = FT_Load_Char(textp->face, *ptr, FT_LOAD_RENDER); |
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if (error) { |
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continue; |
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} |
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draw_bitmap( |
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buf, |
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stride, |
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height, |
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&textp->face->glyph->bitmap, |
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x + textp->face->glyph->bitmap_left, |
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y - textp->face->glyph->bitmap_top); |
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x += textp->face->glyph->advance.x >> 6; |
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} |
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} |
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} |
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@ -0,0 +1,15 @@ |
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#ifndef __TEXT_H__ |
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#define __TEXT_H__ |
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#include <stdint.h> |
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#include <stdbool.h> |
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#include "parameters.h" |
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typedef void text_t; |
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const char *text_get_error(); |
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bool text_create(const parameters_t *params, text_t **text); |
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void text_draw(text_t *text, uint8_t *buf, int stride, int height); |
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#endif |
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