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renderdoc/util/test/demos/gl/gl_draw_zoo.cpp
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baldurk 856c838def Update copyright years to 2026 and fix copyright ranges 
* In a previous update in 2021 many copyright ranges were truncated
  accidentally, and some files have been copy-pasted with wrong years. These
  dates have been fixed based on git history and original copyright messages.
2026-01-05 14:17:28 +00:00

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/******************************************************************************
* The MIT License (MIT)
*
* Copyright (c) 2020-2026 Baldur Karlsson
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
******************************************************************************/
#include "gl_test.h"
RD_TEST(GL_Draw_Zoo, OpenGLGraphicsTest)
{
static constexpr const char *Description =
"Draws several variants using different vertex/index offsets.";
std::string vertex = R"EOSHADER(
#version 420 core
layout(location = 0) in vec3 Position;
layout(location = 1) in vec4 Color;
layout(location = 2) in vec2 UV;
layout(location = 0) out vec4 COLOR;
layout(location = 1) out vec4 TEXCOORD;
layout(location = 2) out float VID;
layout(location = 3) out float IID;
void main()
{
gl_Position = vec4(Position.xyz, 1);
gl_Position.x += Color.w;
COLOR = Color;
TEXCOORD = vec4(UV.xy, 0, 1);
VID = float(gl_VertexID);
IID = float(gl_InstanceID);
}
)EOSHADER";
std::string pixel = R"EOSHADER(
#version 420 core
layout(location = 0) in vec4 COLOR;
layout(location = 1) in vec4 TEXCOORD;
layout(location = 2) in float VID;
layout(location = 3) in float IID;
layout(location = 0, index = 0) out vec4 Color;
void main()
{
Color = vec4(0,0,0,0);
Color.r = VID;
Color.g = IID;
Color.b = COLOR.w;
Color.a = COLOR.g + TEXCOORD.x;
}
)EOSHADER";
int main()
{
// initialise, create window, create context, etc
if(!Init())
return 3;
GLuint vao = MakeVAO();
glBindVertexArray(vao);
DefaultA2V triangle[] = {
// 0
{Vec3f(-1.0f, -1.0f, -1.0f), Vec4f(1.0f, 1.0f, 1.0f, 0.0f), Vec2f(-1.0f, -1.0f)},
// 1, 2, 3
{Vec3f(-0.5f, 0.5f, 0.0f), Vec4f(1.0f, 0.1f, 0.0f, 0.0f), Vec2f(0.0f, 0.0f)},
{Vec3f(0.0f, -0.5f, 0.0f), Vec4f(0.0f, 1.0f, 0.0f, 0.0f), Vec2f(0.0f, 1.0f)},
{Vec3f(0.5f, 0.5f, 0.0f), Vec4f(0.0f, 0.1f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
// 4, 5, 6
{Vec3f(-0.5f, -0.5f, 0.0f), Vec4f(1.0f, 0.1f, 0.0f, 0.0f), Vec2f(0.0f, 0.0f)},
{Vec3f(0.0f, 0.5f, 0.0f), Vec4f(0.0f, 1.0f, 0.0f, 0.0f), Vec2f(0.0f, 1.0f)},
{Vec3f(0.5f, -0.5f, 0.0f), Vec4f(0.0f, 0.1f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
// 7, 8, 9
{Vec3f(-0.5f, 0.0f, 0.0f), Vec4f(1.0f, 0.1f, 0.0f, 0.0f), Vec2f(0.0f, 0.0f)},
{Vec3f(0.0f, -0.5f, 0.0f), Vec4f(0.0f, 1.0f, 0.0f, 0.0f), Vec2f(0.0f, 1.0f)},
{Vec3f(0.0f, 0.5f, 0.0f), Vec4f(0.0f, 0.1f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
// 10, 11, 12
{Vec3f(0.0f, -0.5f, 0.0f), Vec4f(0.0f, 1.0f, 0.0f, 0.0f), Vec2f(0.0f, 1.0f)},
{Vec3f(0.5f, 0.0f, 0.0f), Vec4f(1.0f, 0.1f, 0.0f, 0.0f), Vec2f(0.0f, 0.0f)},
{Vec3f(0.0f, 0.5f, 0.0f), Vec4f(0.0f, 0.1f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
// strips: 13, 14, 15, ...
{Vec3f(-0.5f, 0.2f, 0.0f), Vec4f(0.0f, 1.0f, 0.0f, 0.0f), Vec2f(0.0f, 1.0f)},
{Vec3f(-0.5f, 0.0f, 0.0f), Vec4f(0.2f, 0.1f, 0.0f, 0.0f), Vec2f(0.0f, 0.0f)},
{Vec3f(-0.3f, 0.2f, 0.0f), Vec4f(0.4f, 0.1f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
{Vec3f(-0.3f, 0.0f, 0.0f), Vec4f(0.6f, 0.1f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
{Vec3f(-0.1f, 0.2f, 0.0f), Vec4f(0.8f, 0.1f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
{Vec3f(-0.1f, 0.0f, 0.0f), Vec4f(1.0f, 0.5f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
{Vec3f(0.1f, 0.2f, 0.0f), Vec4f(0.0f, 0.8f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
{Vec3f(0.1f, 0.0f, 0.0f), Vec4f(0.2f, 0.1f, 0.5f, 0.0f), Vec2f(1.0f, 0.0f)},
{Vec3f(0.3f, 0.2f, 0.0f), Vec4f(0.4f, 0.3f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
{Vec3f(0.3f, 0.0f, 0.0f), Vec4f(0.6f, 0.1f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
{Vec3f(0.5f, 0.2f, 0.0f), Vec4f(0.8f, 0.3f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
{Vec3f(0.5f, 0.0f, 0.0f), Vec4f(1.0f, 0.1f, 1.0f, 0.0f), Vec2f(1.0f, 0.0f)},
};
std::vector<DefaultA2V> vbData;
vbData.resize(600);
{
DefaultA2V *src = (DefaultA2V *)triangle;
DefaultA2V *dst = (DefaultA2V *)&vbData[0];
// up-pointing src to offset 0
memcpy(dst + 0, src + 1, sizeof(DefaultA2V));
memcpy(dst + 1, src + 2, sizeof(DefaultA2V));
memcpy(dst + 2, src + 3, sizeof(DefaultA2V));
// invalid vert for index 3 and 4
memcpy(dst + 3, src + 0, sizeof(DefaultA2V));
memcpy(dst + 4, src + 0, sizeof(DefaultA2V));
// down-pointing src at offset 5
memcpy(dst + 5, src + 4, sizeof(DefaultA2V));
memcpy(dst + 6, src + 5, sizeof(DefaultA2V));
memcpy(dst + 7, src + 6, sizeof(DefaultA2V));
// invalid vert for 8 - 12
memcpy(dst + 8, src + 0, sizeof(DefaultA2V));
memcpy(dst + 9, src + 0, sizeof(DefaultA2V));
memcpy(dst + 10, src + 0, sizeof(DefaultA2V));
memcpy(dst + 11, src + 0, sizeof(DefaultA2V));
memcpy(dst + 12, src + 0, sizeof(DefaultA2V));
// left-pointing src data to offset 13
memcpy(dst + 13, src + 7, sizeof(DefaultA2V));
memcpy(dst + 14, src + 8, sizeof(DefaultA2V));
memcpy(dst + 15, src + 9, sizeof(DefaultA2V));
// invalid vert for 16-22
memcpy(dst + 16, src + 0, sizeof(DefaultA2V));
memcpy(dst + 17, src + 0, sizeof(DefaultA2V));
memcpy(dst + 18, src + 0, sizeof(DefaultA2V));
memcpy(dst + 19, src + 0, sizeof(DefaultA2V));
memcpy(dst + 20, src + 0, sizeof(DefaultA2V));
memcpy(dst + 21, src + 0, sizeof(DefaultA2V));
memcpy(dst + 22, src + 0, sizeof(DefaultA2V));
// right-pointing src data to offset 23
memcpy(dst + 23, src + 10, sizeof(DefaultA2V));
memcpy(dst + 24, src + 11, sizeof(DefaultA2V));
memcpy(dst + 25, src + 12, sizeof(DefaultA2V));
// strip after 30
memcpy(dst + 30, src + 13, sizeof(DefaultA2V));
memcpy(dst + 31, src + 14, sizeof(DefaultA2V));
memcpy(dst + 32, src + 15, sizeof(DefaultA2V));
memcpy(dst + 33, src + 16, sizeof(DefaultA2V));
memcpy(dst + 34, src + 17, sizeof(DefaultA2V));
memcpy(dst + 35, src + 18, sizeof(DefaultA2V));
memcpy(dst + 36, src + 19, sizeof(DefaultA2V));
memcpy(dst + 37, src + 20, sizeof(DefaultA2V));
memcpy(dst + 38, src + 21, sizeof(DefaultA2V));
memcpy(dst + 39, src + 22, sizeof(DefaultA2V));
memcpy(dst + 40, src + 23, sizeof(DefaultA2V));
memcpy(dst + 41, src + 24, sizeof(DefaultA2V));
}
for(size_t i = 0; i < vbData.size(); i++)
{
vbData[i].uv.x = float(i);
vbData[i].col.y = float(i) / 200.0f;
}
GLuint vb = MakeBuffer();
glBindBuffer(GL_ARRAY_BUFFER, vb);
glBufferStorage(GL_ARRAY_BUFFER, vbData.size() * sizeof(DefaultA2V), vbData.data(), 0);
Vec4f instData[16] = {};
for(int i = 0; i < ARRAY_COUNT(instData); i++)
instData[i] = Vec4f(-100.0f, -100.0f, -100.0f, -100.0f);
{
instData[0] = Vec4f(0.0f, 0.4f, 1.0f, 0.0f);
instData[1] = Vec4f(0.5f, 0.5f, 0.0f, 0.5f);
instData[5] = Vec4f(0.0f, 0.6f, 0.5f, 0.0f);
instData[6] = Vec4f(0.5f, 0.7f, 1.0f, 0.5f);
instData[13] = Vec4f(0.0f, 0.8f, 0.3f, 0.0f);
instData[14] = Vec4f(0.5f, 0.9f, 0.1f, 0.5f);
}
GLuint instvb = MakeBuffer();
glBindBuffer(GL_ARRAY_BUFFER, instvb);
glBufferStorage(GL_ARRAY_BUFFER, sizeof(instData), instData, 0);
std::vector<uint16_t> idxData;
idxData.resize(100);
{
idxData[0] = 0;
idxData[1] = 1;
idxData[2] = 2;
idxData[5] = 5;
idxData[6] = 6;
idxData[7] = 7;
idxData[13] = 63;
idxData[14] = 64;
idxData[15] = 65;
idxData[23] = 103;
idxData[24] = 104;
idxData[25] = 105;
idxData[37] = 104;
idxData[38] = 105;
idxData[39] = 106;
idxData[42] = 30;
idxData[43] = 31;
idxData[44] = 32;
idxData[45] = 33;
idxData[46] = 34;
idxData[47] = 0xffff;
idxData[48] = 36;
idxData[49] = 37;
idxData[50] = 38;
idxData[51] = 39;
idxData[52] = 40;
idxData[53] = 41;
idxData[54] = 130;
idxData[55] = 131;
idxData[56] = 132;
idxData[57] = 133;
idxData[58] = 134;
idxData[59] = 0xffff;
idxData[60] = 136;
idxData[61] = 137;
idxData[62] = 138;
idxData[63] = 139;
idxData[64] = 140;
idxData[65] = 141;
}
GLuint ib = MakeBuffer();
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ib);
glBufferStorage(GL_ELEMENT_ARRAY_BUFFER, idxData.size() * sizeof(uint16_t), idxData.data(), 0);
glBindVertexArray(vao);
glVertexAttribFormat(0, 3, GL_FLOAT, GL_FALSE, 0);
glVertexAttribFormat(1, 4, GL_FLOAT, GL_FALSE, sizeof(Vec3f));
glVertexAttribFormat(2, 2, GL_FLOAT, GL_FALSE, sizeof(Vec3f) + sizeof(Vec4f));
glVertexAttribBinding(0, 0);
glVertexAttribBinding(1, 0);
glVertexAttribBinding(2, 0);
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glEnableVertexAttribArray(2);
GLuint instvao = MakeVAO();
glBindVertexArray(instvao);
glVertexAttribFormat(0, 3, GL_FLOAT, GL_FALSE, 0);
glVertexAttribFormat(1, 4, GL_FLOAT, GL_FALSE, 0);
glVertexAttribDivisor(1, 1);
glVertexAttribFormat(2, 2, GL_FLOAT, GL_FALSE, sizeof(Vec3f) + sizeof(Vec4f));
glVertexAttribBinding(0, 0);
glVertexAttribBinding(1, 1);
glVertexAttribBinding(2, 0);
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glEnableVertexAttribArray(2);
GLuint program = MakeProgram(vertex, pixel);
GLuint fbo = MakeFBO();
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
// Color render texture
GLuint colattach = MakeTexture();
glBindTexture(GL_TEXTURE_2D, colattach);
glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA32F, screenWidth, screenHeight);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colattach, 0);
// Depth texture
GLuint depthattach = MakeTexture();
glBindTexture(GL_TEXTURE_2D, depthattach);
glTexStorage2D(GL_TEXTURE_2D, 1, GL_DEPTH24_STENCIL8, screenWidth, screenHeight);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, depthattach,
0);
glClearDepth(0.0f);
while(Running())
{
glBindFramebuffer(GL_FRAMEBUFFER, 0);
float col[] = {0.2f, 0.2f, 0.2f, 1.0f};
glClearBufferfv(GL_COLOR, 0, col);
setMarker("GL_ClearDepth");
glClear(GL_DEPTH_BUFFER_BIT);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glBindVertexBuffer(0, vb, 0, sizeof(DefaultA2V));
glBindVertexBuffer(0, instvb, 0, sizeof(Vec4f));
glClearBufferfv(GL_COLOR, 0, col);
glBindVertexArray(vao);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ib);
glUseProgram(program);
GLint w = 48, h = 48;
GLint x = 0, y = screenHeight - h;
glViewport(x, y, w, h);
setMarker("Test Begin");
///////////////////////////////////////////////////
// non-indexed, non-instanced
// basic test
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 0, sizeof(DefaultA2V));
glDrawArrays(GL_TRIANGLES, 0, 3);
x += w;
// test with vertex offset
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 0, sizeof(DefaultA2V));
glDrawArrays(GL_TRIANGLES, 5, 3);
x += w;
// test with vertex offset and vbuffer offset
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 5 * sizeof(DefaultA2V), sizeof(DefaultA2V));
glDrawArrays(GL_TRIANGLES, 8, 3);
x += w;
// adjust to next row
x = 0;
y -= h;
///////////////////////////////////////////////////
// indexed, non-instanced
// basic test
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 0, sizeof(DefaultA2V));
glDrawElementsBaseVertex(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, (void *)(0 * sizeof(uint16_t)), 0);
x += w;
// test with first index
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 0, sizeof(DefaultA2V));
glDrawElementsBaseVertex(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, (void *)(5 * sizeof(uint16_t)), 0);
x += w;
// test with first index and vertex offset
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 0, sizeof(DefaultA2V));
glDrawElementsBaseVertex(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, (void *)(13 * sizeof(uint16_t)),
-50);
x += w;
// test with first index and vertex offset and vbuffer offset
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 10 * sizeof(DefaultA2V), sizeof(DefaultA2V));
glDrawElementsBaseVertex(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, (void *)(23 * sizeof(uint16_t)),
-100);
x += w;
// GL can't have an ibuffer offset, so first index & ibuffer offset are merged
// test with first index and vertex offset and vbuffer offset and ibuffer offset
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 19 * sizeof(DefaultA2V), sizeof(DefaultA2V));
glDrawElementsBaseVertex(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT,
(void *)((14 + 23) * sizeof(uint16_t)), -100);
x += w;
glEnable(GL_PRIMITIVE_RESTART);
glPrimitiveRestartIndex(0xffff);
setMarker("GL_PRIMITIVE_RESTART");
// indexed strip with primitive restart
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 0, sizeof(DefaultA2V));
glDrawElementsBaseVertex(GL_TRIANGLE_STRIP, 12, GL_UNSIGNED_SHORT,
(void *)(42 * sizeof(uint16_t)), 0);
x += w;
glDisable(GL_PRIMITIVE_RESTART);
glEnable(GL_PRIMITIVE_RESTART_FIXED_INDEX);
setMarker("GL_PRIMITIVE_RESTART_FIXED_INDEX");
// indexed strip with primitive restart and vertex offset
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 0, sizeof(DefaultA2V));
glDrawElementsBaseVertex(GL_TRIANGLE_STRIP, 12, GL_UNSIGNED_SHORT,
(void *)(54 * sizeof(uint16_t)), -100);
x += w;
// adjust to next row
x = 0;
y -= h;
glDisable(GL_PRIMITIVE_RESTART_FIXED_INDEX);
glBindVertexArray(instvao);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ib);
///////////////////////////////////////////////////
// non-indexed, instanced
// basic test
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 0, sizeof(DefaultA2V));
glBindVertexBuffer(1, instvb, 0, sizeof(Vec4f));
glDrawArraysInstancedBaseInstance(GL_TRIANGLES, 0, 3, 2, 0);
x += w;
// basic test with first instance
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 5 * sizeof(DefaultA2V), sizeof(DefaultA2V));
glBindVertexBuffer(1, instvb, 0, sizeof(Vec4f));
glDrawArraysInstancedBaseInstance(GL_TRIANGLES, 0, 3, 2, 5);
x += w;
// basic test with first instance and instance buffer offset
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 13 * sizeof(DefaultA2V), sizeof(DefaultA2V));
glBindVertexBuffer(1, instvb, 8 * sizeof(Vec4f), sizeof(Vec4f));
glDrawArraysInstancedBaseInstance(GL_TRIANGLES, 0, 3, 2, 5);
x += w;
// adjust to next row
x = 0;
y -= h;
///////////////////////////////////////////////////
// indexed, instanced
// basic test
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 0, sizeof(DefaultA2V));
glBindVertexBuffer(1, instvb, 0, sizeof(Vec4f));
glDrawElementsInstancedBaseVertexBaseInstance(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT,
(void *)(5 * sizeof(uint16_t)), 2, 0, 0);
x += w;
// basic test with first instance
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 0, sizeof(DefaultA2V));
glBindVertexBuffer(1, instvb, 0, sizeof(Vec4f));
glDrawElementsInstancedBaseVertexBaseInstance(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT,
(void *)(13 * sizeof(uint16_t)), 2, -50, 5);
x += w;
// basic test with first instance and instance buffer offset
glViewport(x, y, w, h);
glBindVertexBuffer(0, vb, 0, sizeof(DefaultA2V));
glBindVertexBuffer(1, instvb, 8 * sizeof(Vec4f), sizeof(Vec4f));
glDrawElementsInstancedBaseVertexBaseInstance(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT,
(void *)(23 * sizeof(uint16_t)), 2, -80, 5);
x += w;
blitToSwap(colattach);
Present();
}
return 0;
}
};
REGISTER_TEST();
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