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First pass at default shader for GLES2,GLES3 and GL3.

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This commit is contained in:
Robert Osfield
2017-03-23 11:09:49 +00:00
parent d70d00607f
commit 9848c1d264
1 changed files with 126 additions and 0 deletions
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126
src/osg/StateSet.cpp
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@@ -29,6 +29,7 @@
#include <osg/TexGen>
#include <osg/Texture1D>
#include <osg/Texture2D>
#include <osg/TextureCubeMap>
#include <osg/TextureRectangle>
#include <osg/Texture2DArray>
@@ -38,6 +39,102 @@
using namespace osg;
#define FIXED_FUNCTION defined(OSG_GL_FIXED_FUNCTION_AVAILABLE)
#define SHADERS_GL3 (defined(OSG_GL3_AVAILABLE) || defined(OSG_GLES3_AVAILABLE))
#define SHADERS_GL2 !FIXED_FUNCTION && !SHADERS_GL3
#define IS_ES (defined(OSG_GLES2_AVAILABLE) || defined(OSG_GLES3_AVAILABLE))
#if SHADERS_GL3
#if !IS_ES
#define GLSL_VERSION_STR "330 core"
#else
#define GLSL_VERSION_STR "300 es"
#endif
static const char* gl3_VertexShader = {
"#version " GLSL_VERSION_STR "\n"
"// gl3_VertexShader\n"
"#ifdef GL_ES\n"
" precision highp float;\n"
"#endif\n"
"in vec4 osg_Vertex;\n"
"in vec4 osg_Color;\n"
"in vec4 osg_MultiTexCoord0;\n"
"uniform mat4 osg_ModelViewProjectionMatrix;\n"
"out vec2 texCoord;\n"
"out vec4 vertexColor;\n"
"void main(void)\n"
"{\n"
" gl_Position = osg_ModelViewProjectionMatrix * osg_Vertex;\n"
" texCoord = osg_MultiTexCoord0.xy;\n"
" vertexColor = osg_Color; \n"
"}\n"
};
static const char* gl3_FragmentShader = {
"#version " GLSL_VERSION_STR "\n"
"// gl3_FragmentShader\n"
"#ifdef GL_ES\n"
" precision highp float;\n"
"#endif\n"
"uniform sampler2D baseTexture;\n"
"in vec2 texCoord;\n"
"in vec4 vertexColor;\n"
"out vec4 color;\n"
"void main(void)\n"
"{\n"
" color = vertexColor * texture2D(baseTexture, texCoord);\n"
"}\n"
};
#endif
#if SHADERS_GL2
static const char* gl2_VertexShader = {
"// gl2_VertexShader\n"
"#ifdef GL_ES\n"
" precision highp float;\n"
"#endif\n"
"varying vec2 texCoord;\n"
"varying vec4 vertexColor;\n"
"void main(void)\n"
"{\n"
" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
" texCoord = gl_MultiTexCoord0.xy;\n"
" vertexColor = gl_Color; \n"
"}\n"
};
static const char* gl2_FragmentShader = {
"// gl2_FragmentShader\n"
"#ifdef GL_ES\n"
" precision highp float;\n"
"#endif\n"
"uniform sampler2D baseTexture;\n"
"varying vec2 texCoord;\n"
"varying vec4 vertexColor;\n"
"void main(void)\n"
"{\n"
" gl_FragColor = vertexColor * texture2D(baseTexture, texCoord);\n"
"}\n"
};
#endif
extern osg::Texture2D* createDefaultTexture()
{
osg::ref_ptr<osg::Image> image = new osg::Image;
image->allocateImage(1, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE);
image->setColor(osg::Vec4(1.0,1.0,1.0,1.0), 0, 0, 0);
osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D(image.get());
return texture.release();
}
// local class to help porting from OSG0.8.x to 0.9.x
class TextureGLModeSet
{
@@ -602,6 +699,35 @@ void StateSet::setGlobalDefaults()
setAttributeAndModes(material,StateAttribute::ON);
#endif
OSG_INFO<<"void StateSet::setGlobalDefaults()"<<std::endl;
#if SHADERS_GL3
OSG_INFO<<" StateSet::setGlobalDefaults() Setting up GL3 compatible shaders"<<std::endl;
osg::ref_ptr<osg::Program> program = new osg::Program;
program->addShader(new osg::Shader(osg::Shader::VERTEX, gl3_VertexShader));
program->addShader(new osg::Shader(osg::Shader::FRAGMENT, gl3_FragmentShader));
setAttributeAndModes(program.get());
setTextureAttribute(0, createDefaultTexture());
addUniform(new osg::Uniform("baseTexture", 0));
#elif SHADERS_GL2
OSG_INFO<<" StateSet::setGlobalDefaults() Setting up GL2 compatible shaders"<<std::endl;
osg::ref_ptr<osg::Program> program = new osg::Program;
program->addShader(new osg::Shader(osg::Shader::VERTEX, gl2_VertexShader));
program->addShader(new osg::Shader(osg::Shader::FRAGMENT, gl2_FragmentShader));
setAttributeAndModes(program.get());
setTextureAttribute(0, createDefaultTexture());
addUniform(new osg::Uniform("baseTexture", 0));
#endif
}