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OpenGL Batcher work

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Matt
2020-08-14 18:23:02 -07:00
parent c53bc96a5d
commit ae0f4c6e19
3 changed files with 94 additions and 36 deletions
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82
src/PlatformLayer/Batcher.bf
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@ -1,36 +1,98 @@
using System.Collections.Generic;
using System.Collections;
using System;
namespace Strawberry
{
public class Batcher
{
List<Batch> batchStack = new System.Collections.List<Batch>() ~ DeleteContainerAndItems!(_);
static public int VertexSize => sizeof(Vertex);
Batch top => batchStack.Count > 0 ? batchStack[batchStack.Count - 1] : null;
private List<Batch> batchStack = new List<Batch>() ~ DeleteContainerAndItems!(_);
private Batch top => batchStack.Count > 0 ? batchStack[batchStack.Count - 1] : null;
public void PushQuad(Vertex a, Vertex b, Vertex c, Vertex d)
private List<Vertex> vertices = new .() ~ delete _;
private List<uint32> indices = new .() ~ delete _;
private uint32 vaoID;
private uint32 vertexBufferID;
private uint32 indexBufferID;
public this()
{
GL.glGenVertexArrays(1, &vaoID);
GL.glBindVertexArray(vaoID);
GL.glGenBuffers(1, &vertexBufferID);
GL.glGenBuffers(1, &indexBufferID);
GL.glBindVertexArray(0);
}
public ~this()
{
GL.glDeleteBuffers(1, &vertexBufferID);
GL.glDeleteBuffers(1, &indexBufferID);
GL.glDeleteVertexArrays(1, &vaoID);
}
public void Draw()
{
GL.glBindVertexArray(vaoID);
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vertexBufferID);
GL.glBufferData(GL.GL_ARRAY_BUFFER, vertices.Count * sizeof(Vertex), vertices.Ptr, GL.GL_DYNAMIC_DRAW);
GL.glBindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, indexBufferID);
GL.glBufferData(GL.GL_ELEMENT_ARRAY_BUFFER, indices.Count * sizeof(uint32), indices.Ptr, GL.GL_DYNAMIC_DRAW);
GL.glDrawElements(GL.GL_TRIANGLES, indices.Count, GL.GL_UNSIGNED_INT, (void*)0);
GL.glBindVertexArray(0);
vertices.Clear();
indices.Clear();
}
public void PushQuad(Vector a, Vector b, Vector c, Vector d, Color color)
{
uint32 count = (uint32)vertices.Count;
vertices.Add(Vertex.Shape(a, color));
vertices.Add(Vertex.Shape(b, color));
vertices.Add(Vertex.Shape(c, color));
vertices.Add(Vertex.Shape(d, color));
indices.Add(count + 0);
indices.Add(count + 1);
indices.Add(count + 2);
indices.Add(count + 0);
indices.Add(count + 2);
indices.Add(count + 3);
}
private class Batch
{
uint32 bufferHandle;
List<Vertex> Vertices;
public this()
{
GL.glGenBuffers(1, &bufferHandle);
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, bufferHandle);
GL.glDeleteBuffers(1, &bufferHandle);
//GL.glGenBuffers(1, &bufferHandle);
//GL.glBindBuffer(GL.GL_ARRAY_BUFFER, bufferHandle);
//GL.glDeleteBuffers(1, &bufferHandle);
}
}
[Ordered, Packed, CRepr]
private struct Vertex
{
public Vector Position;
public Color Color;
public Vector TexCoord;
public (uint8, uint8, uint8) Mode;
static public Vertex Shape(Vector pos, Color color)
{
Vertex v = Vertex();
v.Position = pos;
v.Color = color;
v.Mode = (0, 0, 255);
return v;
}
}
}
}

2
src/PlatformLayer/GL.bf
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@ -942,7 +942,7 @@ namespace Strawberry
public function void GlGetIntegerv(uint pname, int32* data);
public static GlGetIntegerv glGetIntegerv;
public function uint8 GlGetString(uint name);
public function uint8* GlGetString(uint name);
public static GlGetString glGetString;
public function void GlGetTexImage(uint target, int level, uint format, uint type, void* pixels);

46
src/PlatformLayer/SDL2PlatformLayer.bf
View File

@ -13,8 +13,6 @@ namespace Strawberry
private SDL2Shader shader;
private SDL.SDL_GameController*[] gamepads;
private bool* keyboard;
private uint32 vertexArray;
private uint32 vertexbuffer;
private SDL.SDL_GLContext glContext;
private uint glProgram;
@ -59,7 +57,7 @@ namespace Strawberry
// vertex shader
"""
#version 330
uniform mat3x2 u_matrix;
uniform mat4 u_matrix;
layout(location=0) in vec2 a_position;
layout(location=1) in vec2 a_tex;
layout(location=2) in vec4 a_color;
@ -87,7 +85,7 @@ namespace Strawberry
void main(void)
{
vec4 color = texture(u_texture, v_tex);
o_color =
o_color =
v_type.x * color * v_col +
v_type.y * color.a * v_col +
v_type.z * v_col;
@ -105,18 +103,14 @@ namespace Strawberry
if (logLen > 0)
Calc.Log(&log, logLen);
GL.glGenVertexArrays(1, &vertexArray);
GL.glBindVertexArray(vertexArray);
float[?] g_vertex_buffer_data = .(
-1.0f, -1.0f,
1.0f, -1.0f,
0.0f, 1.0f,
);
GL.glGenBuffers(1, &vertexbuffer);
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vertexbuffer);
GL.glBufferData(GL.GL_ARRAY_BUFFER, sizeof(float[6]), &g_vertex_buffer_data, GL.GL_STATIC_DRAW);
GL.glEnableVertexAttribArray(0);
GL.glVertexAttribPointer(0, 2, GL.GL_FLOAT, GL.GL_FALSE, Batcher.VertexSize, (void*)0);
GL.glEnableVertexAttribArray(1);
GL.glVertexAttribPointer(1, 4, GL.GL_UNSIGNED_BYTE, GL.GL_TRUE, Batcher.VertexSize, (void*)8);
GL.glEnableVertexAttribArray(2);
GL.glVertexAttribPointer(2, 2, GL.GL_FLOAT, GL.GL_FALSE, Batcher.VertexSize, (void*)12);
GL.glEnableVertexAttribArray(3);
GL.glVertexAttribPointer(3, 3, GL.GL_UNSIGNED_BYTE, GL.GL_TRUE, Batcher.VertexSize, (void*)20);
}
//Audio
@ -163,16 +157,18 @@ namespace Strawberry
GL.glClear(GL.GL_COLOR_BUFFER_BIT);
GL.glUseProgram(glProgram);
int loc = GL.glGetUniformLocation(glProgram, "u_matrix");
Matrix mat = Matrix.Identity;
GL.glUniformMatrix3x2fv(loc, 1, GL.GL_FALSE, &mat.Values);
float[16] mat =
.(1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1);
GL.glEnableVertexAttribArray(0);
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vertexbuffer);
GL.glVertexAttribPointer(0, 2, GL.GL_FLOAT, GL.GL_FALSE, 0, (void*)0 );
// Draw the triangle !
GL.glDrawArrays(GL.GL_TRIANGLES, 0, 3); // Starting from vertex 0; 3 vertices total -> 1 triangle
GL.glDisableVertexAttribArray(0);
let loc = GL.glGetUniformLocation(glProgram, "u_matrix");
GL.glUniformMatrix4fv(loc, 1, GL.GL_FALSE, &mat);
Batcher b = scope Batcher();
b.PushQuad(.(-1, -1), .(1, -1), .(1, 1), .(-1, 1), .Magenta);
b.Draw();
}
public override void RenderEnd()