<ClCompile Include="src\screen.c" />\r
<ClCompile Include="src\sdl\main.c" />\r
<ClCompile Include="src\sdl\music.c" />\r
+ <ClCompile Include="src\thunder.c" />\r
<ClCompile Include="src\tinyfps.c" />\r
<ClCompile Include="src\tunnel.c" />\r
- <ClCompile Include="thunder.c" />\r
</ItemGroup>\r
<ItemGroup>\r
<ClInclude Include="src\cfgopt.h" />\r
<ClCompile Include="src\bump.c">\r
<Filter>src</Filter>\r
</ClCompile>\r
- <ClCompile Include="thunder.c">\r
+ <ClCompile Include="src\thunder.c">\r
<Filter>src</Filter>\r
</ClCompile>\r
</ItemGroup>\r
--- /dev/null
+/* thunder. c */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <assert.h>
+#include "imago2.h"
+#include "demo.h"
+#include "screen.h"
+
+/* Render blur in half x half dimenstions. Add one pixel padding in all
+ * directions (2 pixels horizontally, 2 pixels vertically).
+ */
+#define BLUR_BUFFER_WIDTH (320/2 + 2)
+#define BLUR_BUFFER_HEIGHT (240/2 + 2)
+#define BLUR_BUFFER_SIZE (BLUR_BUFFER_WIDTH * BLUR_BUFFER_HEIGHT)
+static unsigned char *blurBuffer, *blurBuffer2;
+
+#define THUNDER_RECT_SIZE 4
+#define THUNDER_RANDOMNESS 80
+#define THUNDER_SECONDS 0.1f
+
+/* TODO: Load palette from file */
+static unsigned short palette[256];
+
+void clearBlurBuffer();
+void drawPatternOnBlurBuffer(int seed);
+void applyBlur();
+void blitEffect();
+void thunder(int x0, int y0, int x1, int y1, int seed, int randomness, int depth);
+
+static int init(void);
+static void destroy(void);
+static void start(long trans_time);
+static void stop(long trans_time);
+static void draw(void);
+
+static unsigned int lastFrameTime = 0;
+static float lastFrameDuration = 0.0f;
+static struct screen scr = {
+ "thunder",
+ init,
+ destroy,
+ start,
+ 0,
+ draw
+};
+
+struct screen *thunder_screen(void)
+{
+ return &scr;
+}
+
+static int init(void)
+{
+ int i = 0;
+
+ blurBuffer = malloc(BLUR_BUFFER_SIZE);
+ blurBuffer2 = malloc(BLUR_BUFFER_SIZE);
+
+ clearBlurBuffer();
+
+ /* For now, map to blue */
+ for (i = 0; i < 256; i++) {
+ palette[i] = i >> 3;
+ }
+
+ return 0;
+}
+
+static void destroy(void)
+{
+ free(blurBuffer);
+ blurBuffer = 0;
+
+ free(blurBuffer2);
+ blurBuffer2 = 0;
+}
+
+static void start(long trans_time)
+{
+ lastFrameTime = time_msec;
+}
+
+
+static float remainingThunderDuration = THUNDER_SECONDS;
+static int thunderPattern = 0;
+
+static void draw(void)
+{
+ lastFrameDuration = (time_msec - lastFrameTime) / 1000.0f;
+ lastFrameTime = time_msec;
+
+ remainingThunderDuration -= lastFrameDuration;
+ if (remainingThunderDuration <= 0) {
+ thunderPattern++;
+ remainingThunderDuration = THUNDER_SECONDS;
+ }
+
+
+
+ drawPatternOnBlurBuffer(thunderPattern);
+ applyBlur();
+ blitEffect();
+
+ swap_buffers(0);
+}
+
+void clearBlurBuffer() {
+ /* Clear the whole buffer (including its padding ) */
+ memset(blurBuffer, 0, BLUR_BUFFER_SIZE);
+ memset(blurBuffer2, 0, BLUR_BUFFER_SIZE);
+}
+
+void drawPatternOnBlurBuffer(int seed) {
+ thunder(20, 20, 140, 100, seed, THUNDER_RANDOMNESS, 6);
+}
+
+void applyBlur() {
+ int i, j;
+ unsigned char *tmp;
+ unsigned char *src = blurBuffer + BLUR_BUFFER_WIDTH + 1;
+ unsigned char *dst = blurBuffer2 + BLUR_BUFFER_WIDTH + 1;
+
+ for (j = 0; j < 120; j++) {
+ for (i = 0; i < 160; i++) {
+ *dst = (*(src - 1) + *(src + 1) + *(src - BLUR_BUFFER_WIDTH) + *(src + BLUR_BUFFER_WIDTH)) >> 2;
+ if (*dst > 4) *dst -= 4;
+ else *dst = 0;
+ dst++;
+ src++;
+ }
+ /* Just skip the padding since we went through the scanline in the inner loop (except from the padding) */
+ src += 2;
+ dst += 2;
+ }
+
+ /* Swap blur buffers */
+ tmp = blurBuffer;
+ blurBuffer = blurBuffer2;
+ blurBuffer2 = tmp;
+}
+
+void blitEffect() {
+ unsigned int *dst1 = (unsigned int*) vmem_back;
+ unsigned int *dst2 = dst1 + 160; /* We're writing two pixels at once */
+ unsigned char *src1 = blurBuffer + BLUR_BUFFER_WIDTH + 1;
+ unsigned char *src2 = src1 + BLUR_BUFFER_WIDTH;
+ unsigned char tl, tr, bl, br;
+ int i, j;
+
+ for (j = 0; j < 120; j++) {
+ for (i = 0; i < 160; i++) {
+ tl = *src1;
+ tr = (*src1 + *(src1 + 1)) >> 1;
+ bl = (*src1 + *src2) >> 1;
+ br = tr + ((*src2 + *(src2 + 1)) >> 1) >> 1;
+
+ /* Pack 2 pixels in each 32 bit word */
+ *dst1 = (palette[tr] << 16) | palette[tl];
+ *dst2 = (palette[br] << 16) | palette[bl];
+
+ dst1++;
+ src1++;
+ dst2++;
+ src2++;
+ }
+ /* Again, skip padding */
+ src1 += 2;
+ src2 += 2;
+
+ /* For now, skip a scanline */
+ dst1 += 160;
+ dst2 += 160;
+ }
+
+}
+
+void thunder(int x0, int y0, int x1, int y1, int seed, int randomness, int depth) {
+ int mx = ((x0 + x1) >> 1) + rand() % randomness - randomness / 2;
+ int my = ((y0 + y1) >> 1) + rand() % randomness - randomness / 2;
+ int i, j;
+ unsigned char *dst = blurBuffer + BLUR_BUFFER_WIDTH + 1 + mx + my * BLUR_BUFFER_WIDTH;
+
+ if (depth <= 0) return;
+
+ srand(seed);
+
+ for (j = 0; j < THUNDER_RECT_SIZE; j++) {
+ memset(dst, 255, THUNDER_RECT_SIZE);
+ dst += BLUR_BUFFER_WIDTH;
+ }
+
+ thunder(x0, y0, mx, my, rand(), randomness >> 1, depth-1);
+ thunder(mx, my, x1, y1, rand(), randomness >> 1, depth - 1);
+}
+
+
+
+++ /dev/null
-/* thunder. c */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include <assert.h>
-#include "imago2.h"
-#include "demo.h"
-#include "screen.h"
-
-/* Render blur in half x half dimenstions. Add one pixel padding in all
- * directions (2 pixels horizontally, 2 pixels vertically).
- */
-#define BLUR_BUFFER_WIDTH (320/2 + 2)
-#define BLUR_BUFFER_HEIGHT (240/2 + 2)
-#define BLUR_BUFFER_SIZE (BLUR_BUFFER_WIDTH * BLUR_BUFFER_HEIGHT)
-static unsigned char *blurBuffer, *blurBuffer2;
-
-#define THUNDER_RECT_SIZE 4
-#define THUNDER_RANDOMNESS 80
-#define THUNDER_SECONDS 0.1f
-
-/* TODO: Load palette from file */
-static unsigned short palette[256];
-
-void clearBlurBuffer();
-void drawPatternOnBlurBuffer(int seed);
-void applyBlur();
-void blitEffect();
-void thunder(int x0, int y0, int x1, int y1, int seed, int randomness, int depth);
-
-static int init(void);
-static void destroy(void);
-static void start(long trans_time);
-static void stop(long trans_time);
-static void draw(void);
-
-static unsigned int lastFrameTime = 0;
-static float lastFrameDuration = 0.0f;
-static struct screen scr = {
- "thunder",
- init,
- destroy,
- start,
- 0,
- draw
-};
-
-struct screen *thunder_screen(void)
-{
- return &scr;
-}
-
-static int init(void)
-{
- int i = 0;
-
- blurBuffer = malloc(BLUR_BUFFER_SIZE);
- blurBuffer2 = malloc(BLUR_BUFFER_SIZE);
-
- clearBlurBuffer();
-
- /* For now, map to blue */
- for (i = 0; i < 256; i++) {
- palette[i] = i >> 3;
- }
-
- return 0;
-}
-
-static void destroy(void)
-{
- free(blurBuffer);
- blurBuffer = 0;
-
- free(blurBuffer2);
- blurBuffer2 = 0;
-}
-
-static void start(long trans_time)
-{
- lastFrameTime = time_msec;
-}
-
-
-static float remainingThunderDuration = THUNDER_SECONDS;
-static int thunderPattern = 0;
-
-static void draw(void)
-{
- lastFrameDuration = (time_msec - lastFrameTime) / 1000.0f;
- lastFrameTime = time_msec;
-
- remainingThunderDuration -= lastFrameDuration;
- if (remainingThunderDuration <= 0) {
- thunderPattern++;
- remainingThunderDuration = THUNDER_SECONDS;
- }
-
-
-
- drawPatternOnBlurBuffer(thunderPattern);
- applyBlur();
- blitEffect();
-
- swap_buffers(0);
-}
-
-void clearBlurBuffer() {
- /* Clear the whole buffer (including its padding ) */
- memset(blurBuffer, 0, BLUR_BUFFER_SIZE);
- memset(blurBuffer2, 0, BLUR_BUFFER_SIZE);
-}
-
-void drawPatternOnBlurBuffer(int seed) {
- thunder(20, 20, 140, 100, seed, THUNDER_RANDOMNESS, 6);
-}
-
-void applyBlur() {
- int i, j;
- unsigned char *tmp;
- unsigned char *src = blurBuffer + BLUR_BUFFER_WIDTH + 1;
- unsigned char *dst = blurBuffer2 + BLUR_BUFFER_WIDTH + 1;
-
- for (j = 0; j < 120; j++) {
- for (i = 0; i < 160; i++) {
- *dst = (*(src - 1) + *(src + 1) + *(src - BLUR_BUFFER_WIDTH) + *(src + BLUR_BUFFER_WIDTH)) >> 2;
- if (*dst > 4) *dst -= 4;
- else *dst = 0;
- dst++;
- src++;
- }
- /* Just skip the padding since we went through the scanline in the inner loop (except from the padding) */
- src += 2;
- dst += 2;
- }
-
- /* Swap blur buffers */
- tmp = blurBuffer;
- blurBuffer = blurBuffer2;
- blurBuffer2 = tmp;
-}
-
-void blitEffect() {
- unsigned int *dst1 = (unsigned int*) vmem_back;
- unsigned int *dst2 = dst1 + 160; /* We're writing two pixels at once */
- unsigned char *src1 = blurBuffer + BLUR_BUFFER_WIDTH + 1;
- unsigned char *src2 = src1 + BLUR_BUFFER_WIDTH;
- unsigned char tl, tr, bl, br;
- int i, j;
-
- for (j = 0; j < 120; j++) {
- for (i = 0; i < 160; i++) {
- tl = *src1;
- tr = (*src1 + *(src1 + 1)) >> 1;
- bl = (*src1 + *src2) >> 1;
- br = tr + ((*src2 + *(src2 + 1)) >> 1) >> 1;
-
- /* Pack 2 pixels in each 32 bit word */
- *dst1 = (palette[tr] << 16) | palette[tl];
- *dst2 = (palette[br] << 16) | palette[bl];
-
- dst1++;
- src1++;
- dst2++;
- src2++;
- }
- /* Again, skip padding */
- src1 += 2;
- src2 += 2;
-
- /* For now, skip a scanline */
- dst1 += 160;
- dst2 += 160;
- }
-
-}
-
-void thunder(int x0, int y0, int x1, int y1, int seed, int randomness, int depth) {
- int mx = ((x0 + x1) >> 1) + rand() % randomness - randomness / 2;
- int my = ((y0 + y1) >> 1) + rand() % randomness - randomness / 2;
- int i, j;
- unsigned char *dst = blurBuffer + BLUR_BUFFER_WIDTH + 1 + mx + my * BLUR_BUFFER_WIDTH;
-
- if (depth <= 0) return;
-
- srand(seed);
-
- for (j = 0; j < THUNDER_RECT_SIZE; j++) {
- memset(dst, 255, THUNDER_RECT_SIZE);
- dst += BLUR_BUFFER_WIDTH;
- }
-
- thunder(x0, y0, mx, my, rand(), randomness >> 1, depth-1);
- thunder(mx, my, x1, y1, rand(), randomness >> 1, depth - 1);
-}
-
-
-
projects / dosdemo / commitdiff