Disabled external gits

cs473-es/lab3/sw/nios/application/image_test.c

@@ -0,0 +1,152 @@
+#ifdef ENABLE_IMAGE_TEST
+
+#include "stdint.h"
+#include "math.h"
+#include "stdio.h"
+
+#include "lt24.h"
+
+#include "system.h"
+#include "sys/alt_irq.h"
+
+
+#define W (320)
+#define H (240)
+
+
+typedef struct {
+     unsigned char red,green,blue;
+} PPMPixel;
+
+typedef struct {
+     int x, y;
+     PPMPixel *data;
+} PPMImage;
+
+#define RGB_COMPONENT_COLOR 255
+
+// Source: https://stackoverflow.com/questions/2693631/read-ppm-file-and-store-it-in-an-array-coded-with-c
+static PPMImage *readPPM(const char *filename)
+{
+         char buff[16];
+         PPMImage *img;
+         FILE *fp;
+         int c, rgb_comp_color;
+         //open PPM file for reading
+         fp = fopen(filename, "rb");
+         if (!fp) {
+              fprintf(stderr, "Unable to open file '%s'\n", filename);
+              return NULL;
+         }
+
+         //read image format
+         if (!fgets(buff, sizeof(buff), fp)) {
+              perror(filename);
+              return NULL;
+         }
+
+    //check the image format
+    if (buff[0] != 'P' || buff[1] != '6') {
+         fprintf(stderr, "Invalid image format (must be 'P6')\n");
+         return NULL;
+    }
+
+    //alloc memory form image
+    img = HPS_0_BRIDGES_BASE;//(PPMImage *)malloc(sizeof(PPMImage));
+    if (!img) {
+         fprintf(stderr, "Unable to allocate memory\n");
+         return NULL;
+    }
+
+    //check for comments
+    c = getc(fp);
+    while (c == '#') {
+    while (getc(fp) != '\n') ;
+         c = getc(fp);
+    }
+
+    ungetc(c, fp);
+    //read image size information
+    if (fscanf(fp, "%d %d", &img->x, &img->y) != 2) {
+         fprintf(stderr, "Invalid image size (error loading '%s')\n", filename);
+         return NULL;
+    }
+
+    //read rgb component
+    if (fscanf(fp, "%d", &rgb_comp_color) != 1) {
+         fprintf(stderr, "Invalid rgb component (error loading '%s')\n", filename);
+         return NULL;
+    }
+
+    //check rgb component depth
+    if (rgb_comp_color!= RGB_COMPONENT_COLOR) {
+         fprintf(stderr, "'%s' does not have 8-bits components\n", filename);
+         return NULL;
+    }
+
+    while (fgetc(fp) != '\n') ;
+    //memory allocation for pixel data
+    img->data = HPS_0_BRIDGES_BASE + sizeof(PPMImage);
+
+    if (!img) {
+         fprintf(stderr, "Unable to allocate memory\n");
+         return NULL;
+    }
+
+    //read pixel data from file
+    if (fread(img->data, 3 * img->x, img->y, fp) != img->y) {
+         fprintf(stderr, "Error loading image '%s'\n", filename);
+         return NULL;
+    }
+
+    fclose(fp);
+    return img;
+}
+
+
+void ppmToLCD(uint16_t* lcdbuf, PPMImage* ppm) {
+	pixel_t p;
+	for(int y = 0; y < ppm->y; y++) {
+		for(int x = 0; x < ppm->x; x++) {
+			const PPMPixel* ppmPixel = &ppm->data[y*W + x];
+			p.r = ppmPixel->red >> 3;
+			p.g = ppmPixel->green >> 2;
+			p.b = ppmPixel->blue >> 3;
+			IOWR_16DIRECT(lcdbuf,y*W + x, encPixel(&p));
+		}
+	}
+}
+
+int main()
+{
+	struct LT24 *lcd = LCDCONTROLLER_0_BASE;
+	uint16_t *buffer = HPS_0_BRIDGES_BASE;
+
+    LT24_initialize(lcd);
+    LT24_setWidth(lcd, W);
+    LT24_setHeight(lcd, H);
+
+    LT24_writeBase(lcd, (uint32_t)buffer);
+
+    // Read PPM from file
+    PPMImage* img = readPPM("/mnt/host/application/testimage.ppm");
+    if (img == NULL){
+    	return 1;
+    }
+
+    // Ensure equal to LCD display
+    if(img->x != W || img->y != H) {
+        fprintf(stderr, "Invalid image size (must be 320x240 but was %d x %d)\n", img->x, img->y);
+        return 1;
+    }
+
+    // Write (and translate) to LCD buffer
+    ppmToLCD(buffer, img);
+
+    LT24_refresh(lcd);
+
+    while (1){}
+
+    return 0;
+}
+#endif