diff options
Diffstat (limited to 'fbgl.h')
| -rw-r--r-- | fbgl.h | 316 |
1 files changed, 163 insertions, 153 deletions
@@ -97,7 +97,6 @@ typedef struct fbgl_psf1_font { */ static struct timespec previous_frame_time = { 0 }; - #ifdef __cplusplus extern "C" { #endif @@ -137,9 +136,9 @@ void fbgl_draw_rectangle_filled(fbgl_point_t top_left, fbgl_point_t bottom_right, uint32_t color, fbgl_t *fb); void fbgl_draw_circle_outline(int x, int y, int radius, uint32_t color, - fbgl_t* fb); + fbgl_t *fb); void fbgl_draw_circle_filled(int x, int y, int radius, uint32_t color, - fbgl_t* fb); + fbgl_t *fb); /** * texture @@ -166,8 +165,11 @@ void fbgl_render_psf1_text(fbgl_t *fb, fbgl_psf1_font_t *font, const char *text, * */ #define FBGL_RGB(r, g, b) ((uint32_t)(((r) << 16) | ((g) << 8) | (b))) -#define FBGL_RGBA(r, g, b, a) ((uint32_t)(((a) << 24) | ((r) << 16) | ((g) << 8) | (b))) -#define FBGL_F32RGB_TO_U32(r, g, b) ((uint32_t)(((uint8_t)(r * 255) << 16) | ((uint8_t)(g * 255) << 8) | (uint8_t)(b * 255))) +#define FBGL_RGBA(r, g, b, a) \ + ((uint32_t)(((a) << 24) | ((r) << 16) | ((g) << 8) | (b))) +#define FBGL_F32RGB_TO_U32(r, g, b) \ + ((uint32_t)(((uint8_t)(r * 255) << 16) | ((uint8_t)(g * 255) << 8) | \ + (uint8_t)(b * 255))) #define FBGL_F32RGBA_TO_U32(r, g, b, a) ((uint32_t)(((uint8_t)(a * 255) << 24) | ((uint8_t)(r * 255) << 16) | ((uint8_t)(g * 255) << 8) | (uint8_t)(b * 255)) #ifdef FBGL_IMPLEMENTATION @@ -342,161 +344,169 @@ void fbgl_draw_rectangle_filled(fbgl_point_t top_left, } void fbgl_draw_circle_outline(int x, int y, int radius, uint32_t color, - fbgl_t* fb) + fbgl_t *fb) { - int f = 1 - radius; - int ddF_x = 1; - int ddF_y = -2 * radius; - int xx = 0; - int yy = radius; - - fbgl_put_pixel(x, y + radius, color, fb); - fbgl_put_pixel(x, y - radius, color, fb); - fbgl_put_pixel(x + radius, y, color, fb); - fbgl_put_pixel(x - radius, y, color, fb); - - while (xx < yy) { - if (f >= 0) { - yy--; - ddF_y += 2; - f += ddF_y; - } - xx++; - ddF_x += 2; - f += ddF_x; - - fbgl_put_pixel(x + xx, y + yy, color, fb); - fbgl_put_pixel(x - xx, y + yy, color, fb); - fbgl_put_pixel(x + xx, y - yy, color, fb); - fbgl_put_pixel(x - xx, y - yy, color, fb); - fbgl_put_pixel(x + yy, y + xx, color, fb); - fbgl_put_pixel(x - yy, y + xx, color, fb); - fbgl_put_pixel(x + yy, y - xx, color, fb); - fbgl_put_pixel(x - yy, y - xx, color, fb); - } + int f = 1 - radius; + int ddF_x = 1; + int ddF_y = -2 * radius; + int xx = 0; + int yy = radius; + + fbgl_put_pixel(x, y + radius, color, fb); + fbgl_put_pixel(x, y - radius, color, fb); + fbgl_put_pixel(x + radius, y, color, fb); + fbgl_put_pixel(x - radius, y, color, fb); + + while (xx < yy) { + if (f >= 0) { + yy--; + ddF_y += 2; + f += ddF_y; + } + xx++; + ddF_x += 2; + f += ddF_x; + + fbgl_put_pixel(x + xx, y + yy, color, fb); + fbgl_put_pixel(x - xx, y + yy, color, fb); + fbgl_put_pixel(x + xx, y - yy, color, fb); + fbgl_put_pixel(x - xx, y - yy, color, fb); + fbgl_put_pixel(x + yy, y + xx, color, fb); + fbgl_put_pixel(x - yy, y + xx, color, fb); + fbgl_put_pixel(x + yy, y - xx, color, fb); + fbgl_put_pixel(x - yy, y - xx, color, fb); + } } -void fbgl_draw_circle_filled(int x, int y, int radius, uint32_t color, fbgl_t* fb) +void fbgl_draw_circle_filled(int x, int y, int radius, uint32_t color, + fbgl_t *fb) { - for (int yy = -radius; yy <= radius; ++yy) { - int half_width = (int)sqrt(radius * radius - yy * yy); - - int row_start = x - half_width; - int row_end = x + half_width; - - if (y + yy < 0 || y + yy >= fb->height) - continue; - if (row_start < 0) - row_start = 0; - if (row_end >= fb->width) - row_end = fb->width - 1; - - int pixel_offset = (y + yy) * fb->width + row_start; - int num_pixels = row_end - row_start + 1; - - uint32_t* row_start_ptr = fb->pixels + pixel_offset; - for (int i = 0; i < num_pixels; ++i) { - row_start_ptr[i] = color; - } - } + for (int yy = -radius; yy <= radius; ++yy) { + int half_width = (int)sqrt(radius * radius - yy * yy); + + int row_start = x - half_width; + int row_end = x + half_width; + + if (y + yy < 0 || y + yy >= fb->height) + continue; + if (row_start < 0) + row_start = 0; + if (row_end >= fb->width) + row_end = fb->width - 1; + + int pixel_offset = (y + yy) * fb->width + row_start; + int num_pixels = row_end - row_start + 1; + + uint32_t *row_start_ptr = fb->pixels + pixel_offset; + for (int i = 0; i < num_pixels; ++i) { + row_start_ptr[i] = color; + } + } } -fbgl_tga_texture_t* fbgl_load_tga_texture(const char* path) +fbgl_tga_texture_t *fbgl_load_tga_texture(const char *path) { - FILE* file = fopen(path, "rb"); - if (!file) { - perror("Unable to open texture file"); - return NULL; - } - - // TGA header structure - uint8_t header[18]; - if (fread(header, 1, sizeof(header), file) != sizeof(header)) { - perror("Error reading TGA header"); - fclose(file); - return NULL; - } - - // Allocate texture structure - fbgl_tga_texture_t* texture = (fbgl_tga_texture_t*)malloc( - sizeof(fbgl_tga_texture_t)); - if (!texture) { - perror("Failed to allocate texture structure"); - fclose(file); - return NULL; - } - - // Extract dimensions from header - texture->width = header[12] | (header[13] << 8); - texture->height = header[14] | (header[15] << 8); - uint8_t bits_per_pixel = header[16]; - uint8_t image_descriptor = header[17]; - - // Verify format support - if (bits_per_pixel != 24 && bits_per_pixel != 32) { - fprintf(stderr, - "Unsupported TGA bit depth: %d (only 24 and 32-bit supported)\n", - bits_per_pixel); - free(texture); - fclose(file); - return NULL; - } - - // Skip image ID field - if (header[0]) { - fseek(file, header[0], SEEK_CUR); - } - - // Allocate pixel data - size_t pixel_count = texture->width * texture->height; - texture->data = (uint32_t*)malloc(pixel_count * sizeof(uint32_t)); - if (!texture->data) { - perror("Failed to allocate pixel data"); - free(texture); - fclose(file); - return NULL; - } - - // Read pixel data - uint8_t* pixel_buffer = (uint8_t*)malloc(bits_per_pixel / 8); - if (!pixel_buffer) { - perror("Failed to allocate pixel buffer"); - free(texture->data); - free(texture); - fclose(file); - return NULL; - } - - // Determine if image is flipped (based on image descriptor) - bool bottom_up = !(image_descriptor & 0x20); - - for (size_t i = 0; i < pixel_count; i++) { - size_t pixel_index = bottom_up ? (texture->height - 1 - (i / texture->width)) * texture->width + (i % texture->width) : i; - - if (fread(pixel_buffer, 1, bits_per_pixel / 8, file) != bits_per_pixel / 8) { - perror("Error reading pixel data"); - free(pixel_buffer); - free(texture->data); - free(texture); - fclose(file); - return NULL; - } - - // Convert BGR(A) to RGBA - uint32_t pixel = 0xFF000000; // Default alpha to 255 - pixel |= pixel_buffer[2] << 16; // R - pixel |= pixel_buffer[1] << 8; // G - pixel |= pixel_buffer[0]; // B - if (bits_per_pixel == 32) { - pixel = (pixel & 0x00FFFFFF) | (pixel_buffer[3] << 24); // A - } - - texture->data[pixel_index] = pixel; - } - - free(pixel_buffer); - fclose(file); - return texture; + FILE *file = fopen(path, "rb"); + if (!file) { + perror("Unable to open texture file"); + return NULL; + } + + // TGA header structure + uint8_t header[18]; + if (fread(header, 1, sizeof(header), file) != sizeof(header)) { + perror("Error reading TGA header"); + fclose(file); + return NULL; + } + + // Allocate texture structure + fbgl_tga_texture_t *texture = + (fbgl_tga_texture_t *)malloc(sizeof(fbgl_tga_texture_t)); + if (!texture) { + perror("Failed to allocate texture structure"); + fclose(file); + return NULL; + } + + // Extract dimensions from header + texture->width = header[12] | (header[13] << 8); + texture->height = header[14] | (header[15] << 8); + uint8_t bits_per_pixel = header[16]; + uint8_t image_descriptor = header[17]; + + // Verify format support + if (bits_per_pixel != 24 && bits_per_pixel != 32) { + fprintf(stderr, + "Unsupported TGA bit depth: %d (only 24 and 32-bit supported)\n", + bits_per_pixel); + free(texture); + fclose(file); + return NULL; + } + + // Skip image ID field + if (header[0]) { + fseek(file, header[0], SEEK_CUR); + } + + // Allocate pixel data + size_t pixel_count = texture->width * texture->height; + texture->data = (uint32_t *)malloc(pixel_count * sizeof(uint32_t)); + if (!texture->data) { + perror("Failed to allocate pixel data"); + free(texture); + fclose(file); + return NULL; + } + + // Read pixel data + uint8_t *pixel_buffer = (uint8_t *)malloc(bits_per_pixel / 8); + if (!pixel_buffer) { + perror("Failed to allocate pixel buffer"); + free(texture->data); + free(texture); + fclose(file); + return NULL; + } + + // Determine if image is flipped (based on image descriptor) + bool bottom_up = !(image_descriptor & 0x20); + + for (size_t i = 0; i < pixel_count; i++) { + size_t pixel_index = + bottom_up ? + (texture->height - 1 - (i / texture->width)) * + texture->width + + (i % texture->width) : + i; + + if (fread(pixel_buffer, 1, bits_per_pixel / 8, file) != + bits_per_pixel / 8) { + perror("Error reading pixel data"); + free(pixel_buffer); + free(texture->data); + free(texture); + fclose(file); + return NULL; + } + + // Convert BGR(A) to RGBA + uint32_t pixel = 0xFF000000; // Default alpha to 255 + pixel |= pixel_buffer[2] << 16; // R + pixel |= pixel_buffer[1] << 8; // G + pixel |= pixel_buffer[0]; // B + if (bits_per_pixel == 32) { + pixel = (pixel & 0x00FFFFFF) | + (pixel_buffer[3] << 24); // A + } + + texture->data[pixel_index] = pixel; + } + + free(pixel_buffer); + fclose(file); + return texture; } void fbgl_destroy_texture(fbgl_tga_texture_t *texture) |