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Commit 9bb0bace by daniel@transgaming.com
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Added an ANGLE instancing sample to a new folder in samples.

This sample will show a user how to use the ANGLE-specific extensions for geometry instancing. TRAC #22452 Signed-off-by: Nicolas Capens Signed-off-by: Shannon Woods Author: Jamie Madill git-svn-id: https://angleproject.googlecode.com/svn/branches/dx11proto@1819 736b8ea6-26fd-11df-bfd4-992fa37f6226
parent 7e6649e4
Showing with 344 additions and 0 deletions
samples/angle/Simple_Instancing/Simple_Instancing.c 0 → 100644
//
// Modified from Simple_Texture2D found in:
// Book: OpenGL(R) ES 2.0 Programming Guide
// Authors: Aaftab Munshi, Dan Ginsburg, Dave Shreiner
// ISBN-10: 0321502795
// ISBN-13: 9780321502797
// Publisher: Addison-Wesley Professional
// URLs: http://safari.informit.com/9780321563835
// http://www.opengles-book.com
//
// Simple_Instancing.c
//
// This is a simple example that draws two quads with a 2D
// texture image. The purpose of this example is to demonstrate
// the basics of ANGLE instancing in GLESv2.
//
#include <stdlib.h>
#include "esUtil.h"
#include <GLES2/gl2ext.h>
PFNGLVERTEXATTRIBDIVISORANGLEPROC glVertexAttribDivisorANGLE;
PFNGLDRAWARRAYSINSTANCEDANGLEPROC glDrawArraysInstancedANGLE;
PFNGLDRAWELEMENTSINSTANCEDANGLEPROC glDrawElementsInstancedANGLE;
typedef struct
{
// Handle to a program object
GLuint programObject;
// Attribute locations
GLint positionLoc;
GLint texCoordLoc;
// Sampler location
GLint samplerLoc;
// Texture handle
GLuint textureId;
// Instance VBO
GLint instancePosLoc;
} UserData;
///
// Create a simple 2x2 texture image with four different colors
//
GLuint CreateSimpleTexture2D( )
{
// Texture object handle
GLuint textureId;
// 2x2 Image, 3 bytes per pixel (R, G, B)
GLubyte pixels[4 * 3] =
{
255, 0, 0, // Red
0, 255, 0, // Green
0, 0, 255, // Blue
255, 255, 0 // Yellow
};
// Use tightly packed data
glPixelStorei ( GL_UNPACK_ALIGNMENT, 1 );
// Generate a texture object
glGenTextures ( 1, &textureId );
// Bind the texture object
glBindTexture ( GL_TEXTURE_2D, textureId );
// Load the texture
glTexImage2D ( GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0, GL_RGB, GL_UNSIGNED_BYTE, pixels );
// Set the filtering mode
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
glTexParameteri ( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
return textureId;
}
///
// Initialize the shader and program object
//
int Init ( ESContext *esContext )
{
// init instancing functions
char *extensionString = (char*) glGetString(GL_EXTENSIONS);
UserData *userData = esContext->userData;
GLbyte vShaderStr[] =
"attribute vec3 a_position; \n"
"attribute vec2 a_texCoord; \n"
"attribute vec3 a_instancePos;\n"
"varying vec2 v_texCoord; \n"
"void main() \n"
"{ \n"
" gl_Position = vec4(a_position.xyz + a_instancePos.xyz, 1.0); \n"
" v_texCoord = a_texCoord; \n"
"} \n";
GLbyte fShaderStr[] =
"precision mediump float; \n"
"varying vec2 v_texCoord; \n"
"uniform sampler2D s_texture; \n"
"void main() \n"
"{ \n"
" gl_FragColor = texture2D( s_texture, v_texCoord );\n"
"} \n";
if (strstr(extensionString, "GL_ANGLE_instanced_arrays"))
{
glVertexAttribDivisorANGLE = (PFNGLVERTEXATTRIBDIVISORANGLEPROC)eglGetProcAddress("glVertexAttribDivisorANGLE");
glDrawArraysInstancedANGLE = (PFNGLDRAWARRAYSINSTANCEDANGLEPROC)eglGetProcAddress("glDrawArraysInstancedANGLE");
glDrawElementsInstancedANGLE = (PFNGLDRAWELEMENTSINSTANCEDANGLEPROC)eglGetProcAddress("glDrawElementsInstancedANGLE");
}
// Load the shaders and get a linked program object
userData->programObject = esLoadProgram ( vShaderStr, fShaderStr );
// Get the attribute locations
userData->positionLoc = glGetAttribLocation ( userData->programObject, "a_position" );
userData->texCoordLoc = glGetAttribLocation ( userData->programObject, "a_texCoord" );
userData->instancePosLoc = glGetAttribLocation ( userData->programObject, "a_instancePos" );
// Get the sampler location
userData->samplerLoc = glGetUniformLocation ( userData->programObject, "s_texture" );
// Load the texture
userData->textureId = CreateSimpleTexture2D ();
glClearColor ( 0.0f, 0.0f, 0.0f, 0.0f );
return TRUE;
}
///
// Draw a triangle using the shader pair created in Init()
//
void Draw ( ESContext *esContext )
{
UserData *userData = (UserData*) esContext->userData;
GLfloat vVertices[] = { -0.2f, 0.2f, 0.0f, // Position 0
0.0f, 0.0f, // TexCoord 0
-0.2f, -0.2f, 0.0f, // Position 1
0.0f, 1.0f, // TexCoord 1
0.2f, -0.2f, 0.0f, // Position 2
1.0f, 1.0f, // TexCoord 2
0.2f, 0.2f, 0.0f, // Position 3
1.0f, 0.0f // TexCoord 3
};
GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
GLfloat instanceVerts [] = { -0.3f, -0.3f, 0.0f, 0.3f, 0.3f, 0.0f };
// Set the viewport
glViewport ( 0, 0, esContext->width, esContext->height );
// Clear the color buffer
glClear ( GL_COLOR_BUFFER_BIT );
// Use the program object
glUseProgram ( userData->programObject );
// Load the vertex position
glVertexAttribPointer ( userData->positionLoc, 3, GL_FLOAT,
GL_FALSE, 5 * sizeof(GLfloat), vVertices );
// Load the texture coordinate
glVertexAttribPointer ( userData->texCoordLoc, 2, GL_FLOAT,
GL_FALSE, 5 * sizeof(GLfloat), &vVertices[3] );
// Load the instance position
glVertexAttribPointer ( userData->instancePosLoc, 3, GL_FLOAT,
GL_FALSE, 3 * sizeof(GLfloat), instanceVerts );
glEnableVertexAttribArray ( userData->positionLoc );
glEnableVertexAttribArray ( userData->texCoordLoc );
glEnableVertexAttribArray ( userData->instancePosLoc );
// Enable instancing
glVertexAttribDivisorANGLE( userData->instancePosLoc, 1 );
// Bind the texture
glActiveTexture ( GL_TEXTURE0 );
glBindTexture ( GL_TEXTURE_2D, userData->textureId );
// Set the sampler texture unit to 0
glUniform1i ( userData->samplerLoc, 0 );
glDrawElementsInstancedANGLE ( GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices, 2 );
eglSwapBuffers ( esContext->eglDisplay, esContext->eglSurface );
}
///
// Cleanup
//
void ShutDown ( ESContext *esContext )
{
UserData *userData = (UserData*) esContext->userData;
// Delete texture object
glDeleteTextures ( 1, &userData->textureId );
// Delete program object
glDeleteProgram ( userData->programObject );
}
int main ( int argc, char *argv[] )
{
ESContext esContext;
UserData userData;
esInitContext ( &esContext );
esContext.userData = &userData;
esCreateWindow ( &esContext, TEXT("Simple Instancing"), 320, 240, ES_WINDOW_RGB );
if ( !Init ( &esContext ) )
return 0;
esRegisterDrawFunc ( &esContext, Draw );
esMainLoop ( &esContext );
ShutDown ( &esContext );
}
samples/angle/Simple_Instancing/Simple_Instancing.vcxproj 0 → 100644
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</ProjectConfiguration>
</ItemGroup>
<PropertyGroup Label="Globals">
<ProjectGuid>{EB6E138B-9DE5-41E8-A127-3675AA2BA607}</ProjectGuid>
<RootNamespace>Simple_Texture2D</RootNamespace>
<Keyword>Win32Proj</Keyword>
<ProjectName>Simple_Instancing</ProjectName>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
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<PropertyGroup Label="UserMacros" />
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<EmbedManifest Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</EmbedManifest>
<OutDir Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">$(SolutionDir)$(Configuration)\</OutDir>
<IntDir Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">$(Configuration)\</IntDir>
<LinkIncremental Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">false</LinkIncremental>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<ClCompile>
<Optimization>Disabled</Optimization>
<AdditionalIncludeDirectories>../../gles2_book/Common;../../../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
<PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;_CRT_SECURE_NO_DEPRECATE;NOMINMAX;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<MinimalRebuild>true</MinimalRebuild>
<BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
<RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
<PrecompiledHeader>
</PrecompiledHeader>
<WarningLevel>Level3</WarningLevel>
<DebugInformationFormat>EditAndContinue</DebugInformationFormat>
</ClCompile>
<Link>
<AdditionalLibraryDirectories>%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
<GenerateDebugInformation>true</GenerateDebugInformation>
<SubSystem>Console</SubSystem>
<RandomizedBaseAddress>false</RandomizedBaseAddress>
<DataExecutionPrevention>
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<TargetMachine>MachineX86</TargetMachine>
</Link>
</ItemDefinitionGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<ClCompile>
<AdditionalIncludeDirectories>../../gles2_book/Common;../../../include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
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<RuntimeLibrary>MultiThreaded</RuntimeLibrary>
<PrecompiledHeader>
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<WarningLevel>Level3</WarningLevel>
<DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
</ClCompile>
<Link>
<AdditionalLibraryDirectories>%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
<GenerateDebugInformation>true</GenerateDebugInformation>
<SubSystem>Console</SubSystem>
<OptimizeReferences>true</OptimizeReferences>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
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<TargetMachine>MachineX86</TargetMachine>
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<ItemGroup>
<ClCompile Include="Simple_Instancing.c" />
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<ItemGroup>
<ProjectReference Include="..\..\gles2_book\Common\esUtil.vcxproj">
<Project>{47c93f52-ab4e-4ff9-8d4f-b38cd60a183f}</Project>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">
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\ No newline at end of file
samples/samples.sln
...@@ -34,6 +34,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "PostSubBuffer", "gles2_book ...@@ -34,6 +34,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "PostSubBuffer", "gles2_book
EndProject EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "preprocessor", "..\src\compiler\preprocessor\preprocessor.vcxproj", "{FBE32DF3-0FB0-4F2F-A424-2C21BD7BC325}" Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "preprocessor", "..\src\compiler\preprocessor\preprocessor.vcxproj", "{FBE32DF3-0FB0-4F2F-A424-2C21BD7BC325}"
EndProject EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Simple_Instancing", "angle\Simple_Instancing\Simple_Instancing.vcxproj", "{EB6E138B-9DE5-41E8-A127-3675AA2BA607}"
EndProject
Global Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Win32 = Debug|Win32 Debug|Win32 = Debug|Win32
...@@ -154,6 +156,12 @@ Global ...@@ -154,6 +156,12 @@ Global
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{FBE32DF3-0FB0-4F2F-A424-2C21BD7BC325}.Release|x64.ActiveCfg = Release|x64 {FBE32DF3-0FB0-4F2F-A424-2C21BD7BC325}.Release|x64.ActiveCfg = Release|x64
{FBE32DF3-0FB0-4F2F-A424-2C21BD7BC325}.Release|x64.Build.0 = Release|x64 {FBE32DF3-0FB0-4F2F-A424-2C21BD7BC325}.Release|x64.Build.0 = Release|x64
{EB6E138B-9DE5-41E8-A127-3675AA2BA607}.Debug|Win32.ActiveCfg = Debug|Win32
{EB6E138B-9DE5-41E8-A127-3675AA2BA607}.Debug|Win32.Build.0 = Debug|Win32
{EB6E138B-9DE5-41E8-A127-3675AA2BA607}.Debug|x64.ActiveCfg = Debug|Win32
{EB6E138B-9DE5-41E8-A127-3675AA2BA607}.Release|Win32.ActiveCfg = Release|Win32
{EB6E138B-9DE5-41E8-A127-3675AA2BA607}.Release|Win32.Build.0 = Release|Win32
{EB6E138B-9DE5-41E8-A127-3675AA2BA607}.Release|x64.ActiveCfg = Release|Win32
EndGlobalSection EndGlobalSection
GlobalSection(SolutionProperties) = preSolution GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE HideSolutionNode = FALSE
......
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