REVIEWED: example: Compute shader Game-of-life

4 files changed, 0 insertions, 316 deletions

diff --git a/examples/shaders/resources/shaders/glsl430/gol.glsl b/examples/shaders/resources/shaders/glsl430/gol.glsl
deleted file mode 100644
index 47b1a55f..00000000
--- a/examples/shaders/resources/shaders/glsl430/gol.glsl
+++ /dev/null
@@ -1,64 +0,0 @@
-// Game of Life logic shader

-#version 430

-

-#define GOL_WIDTH 768

-

-layout (local_size_x = 16, local_size_y = 16, local_size_z = 1) in;

-

-layout(std430, binding = 1) readonly restrict buffer golLayout {

-    uint golBuffer[]; // golBuffer[x, y] = golBuffer[x + gl_NumWorkGroups.x * y]

-};

-

-layout(std430, binding = 2) writeonly restrict buffer golLayout2 {

-    uint golBufferDest[]; // golBufferDest[x, y] = golBufferDest[x + gl_NumWorkGroups.x * y]

-};

-

-#define fetchGol(x, y) ((((x) < 0) || ((y) < 0) || ((x) > GOL_WIDTH) || ((y) > GOL_WIDTH)) \

-    ? (0) \

-    : golBuffer[(x) + GOL_WIDTH * (y)])

-

-#define setGol(x, y, value) golBufferDest[(x) + GOL_WIDTH * (y)] = value

-

-void main()

-{

-    uint neighbour_count = 0;

-    uint x = gl_GlobalInvocationID.x;

-    uint y = gl_GlobalInvocationID.y;

-

-    // Top left

-    neighbour_count += fetchGol(x - 1, y - 1);

-

-    // Top middle

-    neighbour_count += fetchGol(x, y - 1);

-

-    // Top right

-    neighbour_count += fetchGol(x + 1, y - 1);

-

-    // Left

-    neighbour_count += fetchGol(x - 1, y);

-

-    // Right

-    neighbour_count += fetchGol(x + 1, y);

-

-    // Bottom left

-    neighbour_count += fetchGol(x - 1, y + 1);

-

-    // Bottom middle

-    neighbour_count += fetchGol(x, y + 1);

-

-    // Bottom right

-    neighbour_count += fetchGol(x + 1, y + 1);

-

-    if (neighbour_count == 3)

-    {

-        setGol(x, y, 1);

-    }

-    else if (neighbour_count == 2)

-    {

-        setGol(x, y, fetchGol(x, y));

-    }

-    else

-    {

-        setGol(x, y, 0);

-    }

-}

diff --git a/examples/shaders/resources/shaders/glsl430/gol_render.glsl b/examples/shaders/resources/shaders/glsl430/gol_render.glsl
deleted file mode 100644
index bbc16eed..00000000
--- a/examples/shaders/resources/shaders/glsl430/gol_render.glsl
+++ /dev/null
@@ -1,34 +0,0 @@
-// Game of Life rendering shader

-// Just renders the content of the ssbo at binding 1 to screen.

-#version 430

-

-#define GOL_WIDTH 768

-

-// Input vertex attributes (from vertex shader)

-in vec2 fragTexCoord;

-

-// Output fragment color

-out vec4 finalColor;

-

-// Input game of life grid.

-layout(std430, binding = 1) readonly buffer golLayout

-{

-    uint golBuffer[];

-};

-

-// Output resolution

-uniform vec2 res;

-

-void main()

-{

-    ivec2 coords = ivec2(fragTexCoord * res);

-

-    if (golBuffer[coords.x + coords.y * uvec2(res).x] == 1)

-    {

-        finalColor = vec4(1.0);

-    }

-    else

-    {

-        finalColor = vec4(0.0, 0.0, 0.0, 1.0);

-    }

-}

diff --git a/examples/shaders/resources/shaders/glsl430/gol_transfert.glsl b/examples/shaders/resources/shaders/glsl430/gol_transfert.glsl
deleted file mode 100644
index 40d54458..00000000
--- a/examples/shaders/resources/shaders/glsl430/gol_transfert.glsl
+++ /dev/null
@@ -1,54 +0,0 @@
-// Game of life transfert shader.

-#version 430

-#define GOL_WIDTH 768

-

-// Structure definitions

-struct GolUpdateCmd {

-    uint x; // x coordinate of the gol command

-    uint y; // y coordinate of the gol command

-    uint w; // width of the filled zone

-    uint enabled; // whether to enable or disable zone

-};

-

-// Local compute unit size.

-layout (local_size_x = 1, local_size_y = 1, local_size_z = 1) in;

-

-// Output game of life grid buffer.

-layout(std430, binding = 1) buffer golBufferLayout

-{

-    uint golBuffer[]; // golBuffer[x, y] = golBuffer[x + GOL_WIDTH * y]

-};

-

-// Command buffer

-layout(std430, binding = 3) readonly restrict buffer golUpdateLayout

-{

-    uint count;

-    GolUpdateCmd commands[];

-};

-

-#define isInside(x, y) (((x) >= 0) && ((y) >= 0) && ((x) < GOL_WIDTH) && ((y) < GOL_WIDTH))

-#define getBufferIndex(x, y) ((x) + GOL_WIDTH * (y))

-

-void main()

-{

-    uint cmd_index = gl_GlobalInvocationID.x;

-    GolUpdateCmd cmd = commands[cmd_index];

-

-    for (uint x = cmd.x; x < (cmd.x + cmd.w); x++)

-    {

-        for (uint y = cmd.y; y < (cmd.y + cmd.w); y++)

-        {

-            if (isInside(x, y))

-            {

-                if (cmd.enabled != 0)

-                {

-                    atomicOr(golBuffer[getBufferIndex(x, y)], 1);

-                }

-                else

-                {

-                    atomicAnd(golBuffer[getBufferIndex(x, y)], 0);

-                }

-            }

-        }

-    }

-}

diff --git a/examples/shaders/shaders_compute_gol.c b/examples/shaders/shaders_compute_gol.c
deleted file mode 100644
index c5645ee2..00000000
--- a/examples/shaders/shaders_compute_gol.c
+++ /dev/null
@@ -1,164 +0,0 @@
-/*******************************************************************************************

-*

-*   raylib [shaders] example - Compute shaders Conway's Game of Life

-*

-*   NOTE: This example requires raylib OpenGL 4.3 versions for compute shaders support,

-*

-*   NOTE: Shaders used in this example are #version 430 (OpenGL 4.3).

-*

-*   This example has been created using raylib 4.0 (www.raylib.com)

-*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)

-*

-*   Example contributed by Teddy Astie (@tsnake41)

-*

-*   Copyright (c) 2021 Teddy Astie (@tsnake41)

-*

-********************************************************************************************/

-

-#include <stdlib.h>

-

-#include "raylib.h"

-#include "rlgl.h"

-

-// IMPORTANT: This must match gol*.glsl GOL_WIDTH constant.

-//            This must be a multiple of 16 (check golLogic compute dispatch).

-#define GOL_WIDTH 768

-

-// Maximum amount of queued draw commands (squares draw from mouse down events).

-#define MAX_BUFFERED_TRANSFERTS 48

-

-struct GolUpdateCmd

-{

-    unsigned int x; // x coordinate of the gol command

-    unsigned int y; // y coordinate of the gol command

-    unsigned int w; // width of the filled zone

-    unsigned int enabled; // whether to enable or disable zone

-};

-

-struct GolUpdateSSBO

-{

-    unsigned int count;

-    struct GolUpdateCmd commands[MAX_BUFFERED_TRANSFERTS];

-};

-

-int main(void)

-{

-    // Initialization

-    //--------------------------------------------------------------------------------------

-    InitWindow(GOL_WIDTH, GOL_WIDTH, "raylib [shaders] example - compute shader gol");

-

-    const Vector2 resolution = { GOL_WIDTH, GOL_WIDTH };

-    unsigned int brushSize = 1;

-

-    // Game of Life logic compute shader

-    char *golLogicCode = LoadFileText("resources/shaders/glsl430/gol.glsl");

-    unsigned int golLogicShader = rlCompileShader(golLogicCode, RL_COMPUTE_SHADER);

-    unsigned int golLogicProgram = rlLoadComputeShaderProgram(golLogicShader);

-    MemFree(golLogicCode);

-

-    // Game of Life logic compute shader

-    Shader golRenderShader = LoadShader(NULL, "resources/shaders/glsl430/gol_render.glsl");

-    int resUniformLoc = GetShaderLocation(golRenderShader, "res");

-

-    // Game of Life transfert shader

-    char *golTransfertCode = LoadFileText("resources/shaders/glsl430/gol_transfert.glsl");

-    unsigned int golTransfertShader = rlCompileShader(golTransfertCode, RL_COMPUTE_SHADER);

-    unsigned int golTransfertProgram = rlLoadComputeShaderProgram(golTransfertShader);

-    MemFree(golTransfertCode);

-

-    // SSBOs

-    unsigned int ssboA = rlLoadShaderBuffer(sizeof(unsigned int) * GOL_WIDTH * GOL_WIDTH, NULL, RL_DYNAMIC_COPY);

-    unsigned int ssboB = rlLoadShaderBuffer(sizeof(unsigned int) * GOL_WIDTH * GOL_WIDTH, NULL, RL_DYNAMIC_COPY);

-

-    struct GolUpdateSSBO transfertBuffer;

-    transfertBuffer.count = 0;

-

-    int transfertSSBO = rlLoadShaderBuffer(sizeof(struct GolUpdateSSBO), NULL, RL_DYNAMIC_COPY);

-

-    // Create a white texture of the size of the window to update 

-    // each pixel of the window using the fragment shader.

-    Image whiteImage = GenImageColor(GOL_WIDTH, GOL_WIDTH, WHITE);

-    Texture whiteTex = LoadTextureFromImage(whiteImage);

-    UnloadImage(whiteImage);

-

-    while (!WindowShouldClose())

-    {

-        if (IsKeyPressed(KEY_UP))                            brushSize *= 2;

-        else if (IsKeyPressed(KEY_DOWN) && (brushSize != 1)) brushSize /= 2;

-

-        if ((IsMouseButtonDown(MOUSE_BUTTON_LEFT) || IsMouseButtonDown(MOUSE_BUTTON_RIGHT))

-            && (transfertBuffer.count < MAX_BUFFERED_TRANSFERTS))

-        {

-            // Buffer a new command

-            transfertBuffer.commands[transfertBuffer.count].x = GetMouseX();

-            transfertBuffer.commands[transfertBuffer.count].y = GetMouseY();

-            transfertBuffer.commands[transfertBuffer.count].w = brushSize;

-            transfertBuffer.commands[transfertBuffer.count].enabled = IsMouseButtonDown(MOUSE_BUTTON_LEFT);

-            transfertBuffer.count++;

-        }

-        else if (transfertBuffer.count > 0)

-        {

-            // Process transfert buffer

-

-            // Send SSBO buffer to GPU

-            rlUpdateShaderBufferElements(transfertSSBO, &transfertBuffer, sizeof(struct GolUpdateSSBO), 0);

-            // Process ssbo command

-            rlEnableShader(golTransfertProgram);

-            rlBindShaderBuffer(ssboA, 1);

-            rlBindShaderBuffer(transfertSSBO, 3);

-            rlComputeShaderDispatch(transfertBuffer.count, 1, 1); // each GPU unit will process a command

-            rlDisableShader();

-

-            transfertBuffer.count = 0;

-        }

-        else

-        {

-            // Process game of life logic

-            rlEnableShader(golLogicProgram);

-            rlBindShaderBuffer(ssboA, 1);

-            rlBindShaderBuffer(ssboB, 2);

-            rlComputeShaderDispatch(GOL_WIDTH / 16, GOL_WIDTH / 16, 1);

-            rlDisableShader();

-

-            // ssboA <-> ssboB

-            int temp = ssboA;

-            ssboA = ssboB;

-            ssboB = temp;

-        }

-

-        rlBindShaderBuffer(ssboA, 1);

-

-        BeginDrawing();

-

-        ClearBackground(BLANK);

-        SetShaderValue(golRenderShader, resUniformLoc, &resolution, SHADER_UNIFORM_VEC2);

-

-        BeginShaderMode(golRenderShader);

-        DrawTexture(whiteTex, 0, 0, WHITE);

-        EndShaderMode();

-

-        DrawFPS(0, 0);

-

-        EndDrawing();

-    }

-

-    // De-Initialization

-    //--------------------------------------------------------------------------------------

-

-    // Unload shader buffers objects.

-    rlUnloadShaderBuffer(ssboA);

-    rlUnloadShaderBuffer(ssboB);

-    rlUnloadShaderBuffer(transfertSSBO);

-

-    // Unload compute shader programs

-    rlUnloadShaderProgram(golTransfertProgram);

-    rlUnloadShaderProgram(golLogicProgram);

-

-    UnloadTexture(whiteTex);       // Unload white texture

-    UnloadShader(golRenderShader); // Unload rendering fragment shader

-

-    CloseWindow();                 // Close window and OpenGL context

-    //--------------------------------------------------------------------------------------

-

-    return 0;

-}