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#ifndef __JE_BASE_SHADER_H__
#define __JE_BASE_SHADER_H__
#include "../../common/je_string.h"
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
static const JinEngine::String SHADER_PROJECTION_MATRIX = "jin_ProjectionMatrix";
static const JinEngine::String SHADER_MODELVIEW_MATRIX = "jin_ModelViewMatrix";
static const JinEngine::String SHADER_MAIN_TEXTURE = "jin_MainTexture";
static const JinEngine::String SHADER_VERTEX_COORDS = "jin_VertexCoords";
static const JinEngine::String SHADER_TEXTURE_COORDS = "jin_TextureCoords";
static const JinEngine::String SHADER_VERSION = "#version 130 core \n";
static const JinEngine::String SHADER_COMMON = R"(
#define Number float
#define Texture sampler2D
#define Canvas sampler2D
#define Color vec4
#define Vec2 vec2
#define Vec3 vec3
#define Vec4 vec4
#define texel texture2D
struct Vertex
{
vec2 xy;
vec2 uv;
};
)";
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
static JinEngine::String formatVertexShader(const JinEngine::String& vert)
{
static JinEngine::String vert_part1 =
SHADER_VERSION +
SHADER_COMMON +
"uniform mat4 " + SHADER_PROJECTION_MATRIX + ";\n"
"uniform mat4 " + SHADER_MODELVIEW_MATRIX + ";\n"
"in vec2 " + SHADER_VERTEX_COORDS + ";\n"
"in vec2 " + SHADER_TEXTURE_COORDS + ";\n"
"out vec4 jin_Color; \n"
"out vec2 jin_XY; \n"
"out vec2 jin_UV; \n";
static JinEngine::String vert_part2 =
"void main()\n"
"{\n"
" vec4 v = " + SHADER_MODELVIEW_MATRIX + " * vec4(" + SHADER_VERTEX_COORDS + ", 0, 1.0);\n"
" Vertex _v = vert(Vertex(v.xy, " + SHADER_TEXTURE_COORDS + "));\n"
" gl_Position = " + SHADER_PROJECTION_MATRIX + " * vec4(_v.xy, 0, 1.0f);\n"
" jin_Color = gl_Color; \n"
" jin_XY = _v.xy; \n"
" jin_UV = _v.uv; \n"
"}";
return vert_part1 + vert + vert_part2;
}
static JinEngine::String formatFragmentShader(const JinEngine::String& frag)
{
static JinEngine::String frag_part1 =
SHADER_VERSION +
SHADER_COMMON +
"uniform Texture " + SHADER_MAIN_TEXTURE + "; \n"
"in vec4 jin_Color; \n"
"in vec2 jin_XY; \n"
"in vec2 jin_UV; \n"
"out vec4 jin_OutColor; \n";
static JinEngine::String frag_part2 =
"void main() \n"
"{\n"
" jin_OutColor = frag(jin_Color, " + SHADER_MAIN_TEXTURE + ", Vertex(jin_XY, jin_UV));\n"
"}\n";
return frag_part1 + frag + frag_part2;
}
#endif // __JE_BASE_SHADER_H__
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