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Simple renderer supports textures

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This commit is contained in:
Nikita Lisitsa 2020-09-30 16:22:08 +03:00
parent 3a3d93c7db
commit b7950a0520
2 changed files with 59 additions and 5 deletions
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5
libs/gfx/include/psemek/gfx/renderer/simple.hpp
View file

@ -2,6 +2,7 @@
#include <psemek/gfx/drawable.hpp>
#include <psemek/gfx/color.hpp>
#include <psemek/gfx/texture.hpp>
#include <psemek/geom/matrix.hpp>
#include <vector>
@ -15,11 +16,13 @@ namespace psemek::gfx
// Attributes:
// 0: vec3 position
// 1: vec4 color (if uniform color is not set)
// 2: vec2 texcoord (if texture is present)
struct render_state
{
drawable const * mesh = nullptr;
std::optional<color_rgba> color;
std::optional<color_rgba> color = std::nullopt;
texture_2d const * texture = nullptr;
};
struct render_object

59
libs/gfx/source/renderer/simple.cpp
View file

@ -39,7 +39,7 @@ void main()
}
)";
static char const fragment_source[] =
static char const color_fragment_source[] =
R"(#version 330
in vec4 color;
@ -49,16 +49,49 @@ void main()
{
out_color = color;
}
)";
static char const textured_vertex_source[] =
R"(#version 330
uniform mat4 u_transform;
layout (location = 0) in vec4 in_position;
layout (location = 2) in vec2 in_texcoord;
out vec2 texcoord;
void main()
{
gl_Position = u_transform * in_position;
texcoord = in_texcoord;
}
)";
static char const textured_fragment_source[] =
R"(#version 330
uniform sampler2D u_texture;
in vec2 texcoord;
out vec4 out_color;
void main()
{
out_color = texture(u_texture, texcoord);
}
)";
struct simple_renderer::impl
{
program attrib_color_program{attrib_color_vertex_source, fragment_source};
program uniform_color_program{uniform_color_vertex_source, fragment_source};
program attrib_color_program{attrib_color_vertex_source, color_fragment_source};
program uniform_color_program{uniform_color_vertex_source, color_fragment_source};
program textured_program{textured_vertex_source, textured_fragment_source};
std::vector<render_object *> objects;
std::vector<render_state> attrib_color_states;
std::vector<render_state> uniform_color_states;
std::vector<render_state> textured_states;
};
simple_renderer::simple_renderer()
@ -83,7 +116,9 @@ void main()
{
if (s.mesh)
{
if (s.color)
if (s.texture)
impl().textured_states.push_back(s);
else if (s.color)
impl().uniform_color_states.push_back(s);
else
impl().attrib_color_states.push_back(s);
@ -124,6 +159,22 @@ void main()
impl().uniform_color_states.clear();
}
if (!impl().textured_states.empty())
{
impl().textured_program.bind();
impl().textured_program["u_transform"] = opts.transform;
impl().textured_program["u_texture"] = 0;
gl::ActiveTexture(gl::TEXTURE0);
for (auto const & s : impl().textured_states)
{
s.texture->bind();
s.mesh->draw();
}
impl().textured_states.clear();
}
}
}