192 lines
4 KiB
C
192 lines
4 KiB
C
/*
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* Kangaroo Punch MultiPlayer Game Server Mark II
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* Copyright (C) 2020-2021 Scott Duensing
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#define STB_IMAGE_IMPLEMENTATION
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#define STBI_ONLY_PNG
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#include "image.h"
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ImageT *imageAllocate(uint16_t w, uint16_t h) {
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uint16_t x;
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uint16_t y;
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ImageT *image;
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// Create new native image
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image = (ImageT *)malloc(sizeof(ImageT));
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if (!image) return NULL;
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image->width = w;
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image->height = h;
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// Create space for converted pixel data - columns
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image->pixels = (ColorT **)malloc(sizeof(ColorT *) * image->width);
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if (!image->pixels) {
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free(image);
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return NULL;
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}
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// Create space for converted pixel data - rows
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for (x=0; x<image->width; x++) {
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image->pixels[x] = (ColorT *)malloc(sizeof(ColorT) * image->height);
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if (!image->pixels[x]) {
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for (y=0; y<x; y++) {
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free(image->pixels[y]);
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}
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free(image->pixels);
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free(image);
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return NULL;
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}
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}
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return image;
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}
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ImageT *imageCreate(uint16_t w, uint16_t h, ColorT color) {
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uint16_t x;
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uint16_t y;
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ImageT *image = imageAllocate(w, h);
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if (!image) return NULL;
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for (y=0; y<image->height; y++) {
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for (x=0; x<image->width; x++) {
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image->pixels[x][y] = color;
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}
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}
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return image;
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}
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uint16_t imageHeightGet(ImageT *image) {
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return image->height;
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}
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uint8_t imageInfoGet(char *filename, uint16_t *width, uint16_t *height) {
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int w; // Using boring old compiler 'int' on purpose.
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int h;
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int n;
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int r;
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r = stbi_info(filename, &w, &h, &n);
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if (r) {
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*width = w;
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*height = h;
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return 1;
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}
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return 0;
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}
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ImageT *imageLoad(char *filename) {
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uint16_t x;
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uint16_t y;
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uint16_t n;
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uint32_t b;
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unsigned char *raw;
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ImageT *image;
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// Load image from disk
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raw = stbi_load(filename, (int *)&x, (int *)&y, (int *)&n, 3);
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if (!raw) return NULL;
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// Create native image.
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image = imageAllocate(x, y);
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if (!image) {
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stbi_image_free(raw);
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return NULL;
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}
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// Convert from RGB to our generic 32 bit pixel format
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b = 0;
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for (y=0; y<image->height; y++) {
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for (x=0; x<image->width; x++) {
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image->pixels[x][y] = vbeMakeColor(raw[b], raw[b + 1], raw[b + 2]);
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b += 3;
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}
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}
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stbi_image_free(raw);
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return image;
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}
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ColorT imagePixelGet(ImageT *image, uint16_t x, uint16_t y) {
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return image->pixels[x][y];
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}
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void imageRender(ImageT *image, uint16_t x, uint16_t y) {
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uint16_t x1;
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uint16_t y1;
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uint16_t x2 = image->width;
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uint16_t y2 = image->height;
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// Clip on right and bottom
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if (x + x2 > vbeSurfaceWidthGet()) x2 -= x + x2 - vbeSurfaceWidthGet();
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if (y + y2 > vbeSurfaceHeightGet()) y2 -= y + y2 - vbeSurfaceHeightGet();
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for (y1=0; y1<y2; y1++) {
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for (x1=0; x1<x2; x1++) {
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vbePutPixel(x + x1, y + y1, image->pixels[x1][y1]);
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}
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}
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}
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void imageRenderWithAlpha(ImageT *image, uint16_t x, uint16_t y, ColorT alpha) {
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uint16_t x1;
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uint16_t y1;
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uint16_t x2 = image->width;
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uint16_t y2 = image->height;
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// Clip on right and bottom
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if (x + x2 > vbeSurfaceWidthGet()) x2 -= x + x2 - vbeSurfaceWidthGet();
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if (y + y2 > vbeSurfaceHeightGet()) y2 -= y + y2 - vbeSurfaceHeightGet();
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for (y1=0; y1<y2; y1++) {
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for (x1=0; x1<x2; x1++) {
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if (alpha != image->pixels[x1][y1]) {
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vbePutPixel(x + x1, y + y1, image->pixels[x1][y1]);
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}
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}
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}
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}
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void imageUnload(ImageT **image) {
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uint16_t x;
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ImageT *i = *image;
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for (x=0; x<i->width; x++) {
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free(i->pixels[x]);
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}
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free(i->pixels);
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free(i);
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i = NULL;
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}
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uint16_t imageWidthGet(ImageT *image) {
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return image->width;
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}
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