Add debug prints
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fd0148ec21
commit
4ed81b2aa1
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@ -3,6 +3,20 @@
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#include <stdint.h>
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#include <stdlib.h>
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#ifdef DEBUG
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void
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debug_print_bytes(FILE* file)
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{
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long p = ftell(file);
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uint8_t buffer[5];
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unsigned l = fread(buffer, 1, 5, file);
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printf("...");
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for (unsigned i = 0; i < l; ++i) printf(" %02x", buffer[i]);
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printf("\n");
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fseek(file, p, SEEK_SET);
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}
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#endif
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enum
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{
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STYLE_TYPE_SOLID_COLOR = 1,
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@ -209,6 +223,9 @@ decode_color(char* buffer, bool gray, bool alpha)
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hvif_status
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read_color_style(hvif_style* style, char* buffer, bool gray, bool alpha)
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{
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#ifdef DEBUG
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printf("%s: start.\n", __func__);
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#endif
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hvif_color color = decode_color(buffer, gray, alpha);
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style->num_stops = 1;
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style->colors = calloc(1, sizeof(hvif_color));
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@ -223,6 +240,9 @@ read_color_style(hvif_style* style, char* buffer, bool gray, bool alpha)
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hvif_status
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read_gradient_style(hvif_style* style, FILE* file, char* style_buffer)
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{
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#ifdef DEBUG
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printf("%s: start.\n", __func__);
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#endif
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uint8_t gradient_type = style_buffer[0];
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uint8_t gradient_flags = style_buffer[1];
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uint8_t gradient_stops = style_buffer[2];
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@ -239,6 +259,9 @@ read_gradient_style(hvif_style* style, FILE* file, char* style_buffer)
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hvif_matrix transformation;
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if (gradient_flags & GRADIENT_FLAG_TRANSFORM) {
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#ifdef DEBUG
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printf("%s: read transfomation matrix.\n", __func__);
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#endif
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/* The transformation matrix is 6 hvif-floats: 18 bytes */
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char buffer[18];
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if (fread(buffer, 1, 18, file) != 18) { return ERROR_EOF; }
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@ -254,6 +277,9 @@ read_gradient_style(hvif_style* style, FILE* file, char* style_buffer)
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if (!style->offsets || !style->colors) return ERROR_NOMEM;
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#ifdef DEBUG
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printf("%s: read %u stops.\n", __func__, gradient_stops);
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#endif
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char buffer[4];
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for (unsigned i = 0; i < gradient_stops; ++i) {
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if (fread(buffer, 1, 1, file) != 1) { return ERROR_EOF; }
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@ -310,7 +336,11 @@ read_style(FILE* file, hvif_style* style)
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if (fread(buffer, 1, 1, file) != 1) { return ERROR_EOF; }
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read_color_style(style, buffer, true, false);
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break;
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default: return ERROR_STYLE;
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default:
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#ifdef DEBUG
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printf("%s: error unkown style type %u.\n", __func__, type);
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#endif
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return ERROR_STYLE;
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}
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return SUCCESS;
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}
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@ -438,6 +468,9 @@ hvif_from_file(FILE* file)
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{
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uint32_t const magic = 0x6669636e; /* 'finc' (on disk little endian 'cnif') */
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#ifdef DEBUG
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printf("%s: checking magic number.\n", __func__);
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#endif
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char magic_buffer[4];
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if (fread(magic_buffer, 1, 4, file) != 4) { return ERROR_RESULT(ERROR_EOF); }
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uint32_t read_magic;
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@ -451,6 +484,9 @@ hvif_from_file(FILE* file)
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hvif_free(image);
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return ERROR_RESULT(ERROR_EOF);
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}
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#ifdef DEBUG
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printf("%s: reading %u styles.\n", __func__, image->num_styles);
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#endif
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image->styles = calloc(image->num_styles, sizeof(hvif_style));
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if (!image->styles) {
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hvif_free(image);
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@ -468,6 +504,9 @@ hvif_from_file(FILE* file)
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hvif_free(image);
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return ERROR_RESULT(ERROR_EOF);
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}
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#ifdef DEBUG
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printf("%s: reading %u paths.\n", __func__, image->num_styles);
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#endif
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image->paths = calloc(image->num_paths, sizeof(hvif_path));
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if (!image->paths) {
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hvif_free(image);
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@ -480,6 +519,10 @@ hvif_from_file(FILE* file)
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return ERROR_RESULT(s);
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}
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}
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#ifdef DEBUG
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printf("%s: incomplete parsing stopped.\n", __func__);
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debug_print_bytes(file);
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#endif
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return SUCCESS_RESULT(image);
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}
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