unsigned char *scans;
} RLEBitmap;
-static RLEBitmap rleCreate(unsigned int w, unsigned int h);
-static void rleDestroy(RLEBitmap b);
+static RLEBitmap *rleCreate(unsigned int w, unsigned int h);
+static void rleDestroy(RLEBitmap *b);
static void rleBlit(unsigned short *dst, int dstW, int dstH, int dstStride,
- RLEBitmap bitmap, int blitX, int blitY);
+ RLEBitmap *bitmap, int blitX, int blitY);
static void rleBlitScale(unsigned short *dst, int dstW, int dstH, int dstStride,
- RLEBitmap bitmap, int blitX, int blitY, float scaleX, float scaleY);
+ RLEBitmap *bitmap, int blitX, int blitY, float scaleX, float scaleY);
static void rleBlitScaleInv(unsigned short *dst, int dstW, int dstH, int dstStride,
- RLEBitmap bitmap, int blitX, int blitY, float scaleX, float scaleY);
-static RLEBitmap rleEncode(unsigned char *pixels, unsigned int w, unsigned int h);
+ RLEBitmap *bitmap, int blitX, int blitY, float scaleX, float scaleY);
+static RLEBitmap *rleEncode(RLEBitmap *b, unsigned char *pixels, unsigned int w, unsigned int h);
+
+static void updatePropeller(float t);
#define BG_FILENAME "data/grise.png"
#define GROBJ_01_FILENAME "data/grobj_01.png"
static int scrollModTable[REFLECTION_HEIGHT];
static float nearScrollAmount = 0.0f;
-static RLEBitmap grobj;
+static char miniFXBuffer[1024];
+
+static RLEBitmap *grobj = 0;
static struct screen scr = {
"galaxyrise",
int tmpBitmapW, tmpBitmapH;
/* Allocate back buffer */
- backBuffer = (unsigned short*) malloc(BB_SIZE * BB_SIZE * sizeof(unsigned short));
+ backBuffer = (unsigned short*) calloc(BB_SIZE * BB_SIZE, sizeof(unsigned short));
/* grise.png contains the background (horizon), baked reflection and normalmap for displacement */
if (!(background = img_load_pixels(BG_FILENAME, &backgroundW, &backgroundH, IMG_FMT_RGBA32))) {
return -1;
}
- grobj = rleEncode(tmpBitmap, tmpBitmapW, tmpBitmapH);
+ grobj = rleEncode(0, tmpBitmap, tmpBitmapW, tmpBitmapH);
img_free_pixels(tmpBitmap);
{
}
+
+
+
static void draw(void)
{
int scroll = MIN_SCROLL + (MAX_SCROLL - MIN_SCROLL) * mouse_x / fb_width;
lastFrameDuration = (time_msec - lastFrameTime) / 1000.0f;
lastFrameTime = time_msec;
+ /* Update mini-effects here */
+ updatePropeller(time_msec / 1000.0f);
+
/* First, render the horizon */
for (scanline = 0; scanline < HORIZON_HEIGHT; scanline++) {
memcpy(dst, src, fb_width * 2);
}
/* Then after displacement, blit the objects */
- //for (i = 0; i < 5; i++) rleBlit(backBuffer + PIXEL_PADDING, fb_width, fb_height, BB_SIZE, grobj, 134 + (i-3) * 60, 100);
- for (i = 0; i < 5; i++) rleBlitScale(backBuffer + PIXEL_PADDING, fb_width, fb_height, BB_SIZE, grobj, 134 + (i - 3) * 120, 0, 1.8f, 1.8f);
+ for (i = 0; i < 5; i++) rleBlit(backBuffer + PIXEL_PADDING, fb_width, fb_height, BB_SIZE, grobj, 134 + (i-3) * 60, 100);
+
+ for (scanline = 0; scanline < 32; scanline++) {
+ for (i = 0; i < 32; i++) {
+ backBuffer[PIXEL_PADDING + scanline * BB_SIZE + i] = miniFXBuffer[i + 32 * scanline] ? 0xFFFF : 0x0000;
+ }
+ }
/* Blit effect to framebuffer */
src = backBuffer + PIXEL_PADDING;
- dst = fb_pixels;
+ dst = vmem_back;
for (scanline = 0; scanline < fb_height; scanline++) {
memcpy(dst, src, fb_width * 2);
src += BB_SIZE;
dst += fb_width;
}
- swap_buffers(fb_pixels);
+ swap_buffers(0);
}
/* src and dst can be the same */
#define RLE_STREAKS_PER_SCANLINE 4
/* Every streak is encoded by 2 bytes: offset and count of black pixels in the streak */
#define RLE_BYTES_PER_SCANLINE RLE_STREAKS_PER_SCANLINE * 2
-#define RLE_FILL_COLOR 0xFF00
+#define RLE_FILL_COLOR 0
#define RLE_FILL_COLOR_32 ((RLE_FILL_COLOR << 16) | RLE_FILL_COLOR)
#define RLE_FIXED_BITS 16
-static RLEBitmap rleCreate(unsigned int w, unsigned int h) {
- RLEBitmap ret;
- ret.w = w;
- ret.h = h;
+static RLEBitmap *rleCreate(unsigned int w, unsigned int h) {
+ RLEBitmap *ret = (RLEBitmap*)malloc(sizeof(RLEBitmap));
+ ret->w = w;
+ ret->h = h;
/* Add some padding at the end of the buffer, with the worst case for a scanline (w/2 streaks) */
- ret.scans = (unsigned char*) calloc(h * RLE_BYTES_PER_SCANLINE + w, 1);
+ ret->scans = (unsigned char*) calloc(h * RLE_BYTES_PER_SCANLINE + w, 1);
return ret;
}
-static void rleDestroy(RLEBitmap b) {
- free(b.scans);
+static void rleDestroy(RLEBitmap *b) {
+ if (!b) return;
+ free(b->scans);
+ free(b);
}
-static RLEBitmap rleEncode(unsigned char *pixels, unsigned int w, unsigned int h) {
+static RLEBitmap *rleEncode(RLEBitmap *b, unsigned char *pixels, unsigned int w, unsigned int h) {
int scanline;
int i;
int penActive = 0;
int counter = 0;
int accum = 0;
- RLEBitmap ret;
unsigned char *output;
/* https://www.youtube.com/watch?v=RKMR02o1I88&feature=youtu.be&t=55 */
- ret = rleCreate(w, h);
+ if (!b) b = rleCreate(w, h);
for (scanline = 0; scanline < h; scanline++) {
- output = ret.scans + scanline * RLE_BYTES_PER_SCANLINE;
+ output = b->scans + scanline * RLE_BYTES_PER_SCANLINE;
accum = 0;
for (i = 0; i < w; i++) {
if (*pixels++) {
counter = 0;
}
- return ret;
+ return b;
}
static void rleBlit(unsigned short *dst, int dstW, int dstH, int dstStride,
- RLEBitmap bitmap, int blitX, int blitY)
+ RLEBitmap *bitmap, int blitX, int blitY)
{
int scanline = 0;
int streakPos = 0;
int streakLength = 0;
int streak = 0;
- unsigned char *input = bitmap.scans;
+ unsigned char *input = bitmap->scans;
unsigned short *output;
unsigned int *output32;
dst += blitX + blitY * dstStride;
- for (scanline = blitY; scanline < blitY + bitmap.h; scanline++) {
+ for (scanline = blitY; scanline < blitY + bitmap->h; scanline++) {
if (scanline < 0 || scanline >= dstH) continue;
for (streak = 0; streak < RLE_STREAKS_PER_SCANLINE; streak++) {
streakPos = *input++;
}
static void rleBlitScale(unsigned short *dst, int dstW, int dstH, int dstStride,
- RLEBitmap bitmap, int blitX, int blitY, float scaleX, float scaleY)
+ RLEBitmap *bitmap, int blitX, int blitY, float scaleX, float scaleY)
{
int scanline = 0;
int streakPos = 0;
int scanlineCounter = 0;
static unsigned char scan[512];
- int blitW = (int) (bitmap.w * scaleX + 0.5f);
- int blitH = (int)(bitmap.h * scaleY + 0.5f);
+ int blitW = (int)(bitmap->w * scaleX + 0.5f);
+ int blitH = (int)(bitmap->h * scaleY + 0.5f);
/* From this point on, scaleY will be inverted */
scaleY = 1.0f / scaleY;
for (scanline = blitY; scanline < blitY + blitH; scanline++) {
float normalScan = scanlineCounter * scaleY; /* ScaleY is inverted */
- unsigned char *scan0 = bitmap.scans + RLE_BYTES_PER_SCANLINE * (int)normalScan;
+ unsigned char *scan0 = bitmap->scans + RLE_BYTES_PER_SCANLINE * (int)normalScan;
unsigned char *scan1 = scan0 + RLE_BYTES_PER_SCANLINE;
normalScan -= (int)normalScan;
interpolateScan(scan, scan0, scan1, normalScan);
static void rleBlitScaleInv(unsigned short *dst, int dstW, int dstH, int dstStride,
- RLEBitmap bitmap, int blitX, int blitY, float scaleX, float scaleY)
+ RLEBitmap *bitmap, int blitX, int blitY, float scaleX, float scaleY)
{
int scanline = 0;
int streakPos = 0;
int scanlineCounter = 0;
static unsigned char scan[512];
- int blitW = (int)(bitmap.w * scaleX + 0.5f);
- int blitH = (int)(bitmap.h * scaleY + 0.5f);
+ int blitW = (int)(bitmap->w * scaleX + 0.5f);
+ int blitH = (int)(bitmap->h * scaleY + 0.5f);
/* From this point on, scaleY will be inverted */
scaleY = 1.0f / scaleY;
for (scanline = blitY; scanline > blitY - blitH; scanline--) {
float normalScan = scanlineCounter * scaleY; /* ScaleY is inverted */
- unsigned char *scan0 = bitmap.scans + RLE_BYTES_PER_SCANLINE * (int)normalScan;
+ unsigned char *scan0 = bitmap->scans + RLE_BYTES_PER_SCANLINE * (int)normalScan;
unsigned char *scan1 = scan0 + RLE_BYTES_PER_SCANLINE;
normalScan -= (int)normalScan;
interpolateScan(scan, scan0, scan1, normalScan);
dst -= dstStride;
}
-}
\ No newline at end of file
+}
+
+/* -------------------------------------------------------------------------------------------------
+* PROPELLER STUFF
+* -------------------------------------------------------------------------------------------------
+*/
+
+#define PROPELLER_CIRCLE_RADIUS 18
+#define PROPELLER_CIRCLE_RADIUS_SQ (PROPELLER_CIRCLE_RADIUS * PROPELLER_CIRCLE_RADIUS)
+
+static struct {
+ int circleX[3];
+ int circleY[3];
+} propellerState;
+
+static void updatePropeller(float t) {
+ int i, j;
+ int cx, cy, count = 0;
+ char *dst;
+ float x = 0.0f;
+ float y = 18.0f;
+ float nx, ny;
+ float cost, sint;
+ static float sin120 = 0.86602540378f;
+ static float cos120 = -0.5f;
+
+ /* Rotate */
+ sint = sin(t);
+ cost = cos(t);
+ nx = x * cost - y * sint;
+ ny = y * cost + x * sint;
+ x = nx;
+ y = ny;
+ propellerState.circleX[0] = (int)(x + 0.5f) + 16;
+ propellerState.circleY[0] = (int)(y + 0.5f) + 16;
+
+ /* Rotate by 120 degrees, for the second circle */
+ nx = x * cos120 - y * sin120;
+ ny = y * cos120 + x * sin120;
+ x = nx;
+ y = ny;
+ propellerState.circleX[1] = (int)(x + 0.5f) + 16;
+ propellerState.circleY[1] = (int)(y + 0.5f) + 16;
+
+ /* 3rd circle */
+ nx = x * cos120 - y * sin120;
+ ny = y * cos120 + x * sin120;
+ x = nx;
+ y = ny;
+ propellerState.circleX[2] = (int)(x + 0.5f) + 16;
+ propellerState.circleY[2] = (int)(y + 0.5f) + 16;
+
+ /* Write effect to the mini fx buffer*/
+ dst = miniFXBuffer;
+ for (j = 0; j < 32; j++) {
+ for (i = 0; i < 32; i++) {
+ count = 0;
+
+ /* First circle */
+ cx = propellerState.circleX[0] - i;
+ cy = propellerState.circleY[0] - j;
+ if (cx*cx + cy*cy < PROPELLER_CIRCLE_RADIUS_SQ) count++;
+
+ /* 2nd circle */
+ cx = propellerState.circleX[1] - i;
+ cy = propellerState.circleY[1] - j;
+ if (cx*cx + cy*cy < PROPELLER_CIRCLE_RADIUS_SQ) count++;
+
+ /* 3rd circle */
+ cx = propellerState.circleX[2] - i;
+ cy = propellerState.circleY[2] - j;
+ if (cx*cx + cy*cy < PROPELLER_CIRCLE_RADIUS_SQ) count++;
+
+ *dst++ = count >= 2;
+ }
+ }
+}
projects / dosdemo / blobdiff