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/*
* https://stackoverflow.com/questions/10868958/what-does-sampler2d-store
* The sampler2D is bound to a texture unit. The glUniform call binds it to texture
* unit zero. The glActiveTexture call is only needed if you are going to use multiple
* texture units (because GL_TEXTURE0 is the default anyway).
*/
/*
#VERTEX_SHADER
vertex vert(vertex v)
{
return v;
}
#END_VERTEX_SHADER
#FRAGMENT_SHADER
vec4 frag(vec4 color, Texture tex, vertex v)
{
return Texel(tex, v.uv);
}
#END_FRAGMENT_SHADER
*/
static const char* base_shared = 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 const int BASE_SHARED_SIZE = strlen(base_shared);
static const char* base_vertex = R"(
#version 130 core
%s
uniform mat4 jin_ProjectionMatrix;
uniform mat4 jin_ModelMatrix;
in vec2 jin_VertexCoords;
in vec2 jin_TextureCoords;
out vec4 jin_Color;
out vec2 jin_XY;
out vec2 jin_UV;
%s
void main()
{
vec4 v = jin_ModelMatrix * vec4(jin_VertexCoords, 0, 1.0);
Vertex _v = vert(Vertex(v.xy, jin_TextureCoords));
gl_Position = jin_ProjectionMatrix * vec4(_v.xy, 0, 1.0f);
jin_Color = gl_Color;
jin_XY = _v.xy;
jin_UV = _v.uv;
}
)";
static const int BASE_VERTEX_SHADER_SIZE = strlen(base_vertex) + BASE_SHARED_SIZE;
#define formatVertexShader(buf, program) sprintf(buf,base_vertex, base_shared, program)
static const char* base_fragment = R"(
#version 130 core
%s
uniform Texture jin_MainTexture;
in vec4 jin_Color;
in vec2 jin_XY;
in vec2 jin_UV;
out vec4 jin_OutColor;
%s
void main()
{
jin_OutColor = frag(jin_Color, jin_MainTexture, Vertex(jin_XY, jin_UV));
}
)";
static const int BASE_FRAGMENT_SHADER_SIZE = strlen(base_fragment) + BASE_SHARED_SIZE;
#define formatFragmentShader(buf, program) sprintf(buf, base_fragment, base_shared, program)
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