433 lines
20 KiB
C
433 lines
20 KiB
C
#pragma once
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#include <kinc/global.h>
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#include <kinc/math/matrix.h>
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#include "constantlocation.h"
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#include "pipeline.h"
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#include "textureunit.h"
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/*! \file graphics.h
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\brief Contains the base G4-functionality.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct kinc_g4_pipeline;
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struct kinc_g4_render_target;
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struct kinc_g4_texture;
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struct kinc_g4_texture_array;
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#ifdef KINC_KONG
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struct kinc_g4_constant_buffer;
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#endif
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typedef enum {
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KINC_G4_TEXTURE_ADDRESSING_REPEAT,
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KINC_G4_TEXTURE_ADDRESSING_MIRROR,
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KINC_G4_TEXTURE_ADDRESSING_CLAMP,
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KINC_G4_TEXTURE_ADDRESSING_BORDER
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} kinc_g4_texture_addressing_t;
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typedef enum { KINC_G4_TEXTURE_DIRECTION_U, KINC_G4_TEXTURE_DIRECTION_V, KINC_G4_TEXTURE_DIRECTION_W } kinc_g4_texture_direction_t;
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typedef enum { KINC_G4_TEXTURE_FILTER_POINT, KINC_G4_TEXTURE_FILTER_LINEAR, KINC_G4_TEXTURE_FILTER_ANISOTROPIC } kinc_g4_texture_filter_t;
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typedef enum {
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KINC_G4_MIPMAP_FILTER_NONE,
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KINC_G4_MIPMAP_FILTER_POINT,
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KINC_G4_MIPMAP_FILTER_LINEAR // linear texture filter + linear mip filter -> trilinear filter
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} kinc_g4_mipmap_filter_t;
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/// <summary>
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/// Returns whether instanced rendering (kinc_g4_draw_indexed_vertices_instanced and pals) is supported.
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/// </summary>
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/// <returns>Whether instanced rendering is supported</returns>
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KINC_FUNC bool kinc_g4_supports_instanced_rendering(void);
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/// <summary>
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/// Returns whether GPU-compute (the functions in kinc/graphics4/compute.h) is supported.
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/// </summary>
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/// <returns>Whether GPU-compute is supported</returns>
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KINC_FUNC bool kinc_g4_supports_compute_shaders(void);
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/// <summary>
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/// Returns whether blend-constants (see kinc_g4_set_blend_constant and the blending-properties for pipelines) are supported.
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/// </summary>
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/// <returns>Whether blend-constants are supported</returns>
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KINC_FUNC bool kinc_g4_supports_blend_constants(void);
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/// <summary>
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/// Returns whether textures are supported which have widths/heights which are not powers of two.
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/// </summary>
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/// <returns>Whether non power of two texture-sizes are supported</returns>
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KINC_FUNC bool kinc_g4_supports_non_pow2_textures(void);
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/// <summary>
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/// Returns whether render-targets are upside down. This happens in OpenGL and there is currently no automatic mitigation.
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/// </summary>
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/// <returns>Whether render-targets are upside down</returns>
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KINC_FUNC bool kinc_g4_render_targets_inverted_y(void);
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/// <summary>
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/// Returns how many textures can be used at the same time in a fragment-shader.
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/// </summary>
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/// <returns>The number of textures</returns>
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KINC_FUNC int kinc_g4_max_bound_textures(void);
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/// <summary>
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/// Kicks off lingering work - may or may not actually do anything depending on the underlying graphics-API.
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/// </summary>
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KINC_FUNC void kinc_g4_flush(void);
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/// <summary>
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/// Needs to be called before rendering to a window. Typically called at the start of each frame.
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/// </summary>
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/// <param name="window">The window to render to</param>
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KINC_FUNC void kinc_g4_begin(int window);
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/// <summary>
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/// Needs to be called after rendering to a window. Typically called at the end of each frame.
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/// </summary>
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/// <param name="window">The window to render to</param>
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/// <returns></returns>
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KINC_FUNC void kinc_g4_end(int window);
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/// <summary>
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/// Needs to be called to make the rendered frame visible. Typically called at the very end of each frame.
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/// </summary>
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KINC_FUNC bool kinc_g4_swap_buffers(void);
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#define KINC_G4_CLEAR_COLOR 1
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#define KINC_G4_CLEAR_DEPTH 2
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#define KINC_G4_CLEAR_STENCIL 4
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/// <summary>
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/// Clears the color, depth and/or stencil-components of the current framebuffer or render-target.
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/// </summary>
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/// <param name="flags">Defines what components to clear</param>
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/// <param name="color">The color-value to clear to</param>
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/// <param name="depth">The depth-value to clear to</param>
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/// <param name="stencil">The stencil-value to clear to</param>
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KINC_FUNC void kinc_g4_clear(unsigned flags, unsigned color, float depth, int stencil);
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/// <summary>
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/// Sets the viewport which defines the portion of the framebuffer or render-target things are rendered into. By default the viewport is equivalent to the full
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/// size of the current render-target or framebuffer.
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/// </summary>
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/// <param name="x">The x-offset of the viewport from the left of the screen in pixels</param>
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/// <param name="y">The y-offset of the viewport from the top of the screen in pixels</param>
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/// <param name="width">The width of the viewport in pixels</param>
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/// <param name="height">The height of the viewport in pixels</param>
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KINC_FUNC void kinc_g4_viewport(int x, int y, int width, int height);
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/// <summary>
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/// Enables and defines the scissor-rect. When the scissor-rect is enabled, anything that's rendered outside of the scissor-rect will be ignored.
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/// </summary>
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/// <param name="x">The x-offset of the scissor-rect from the left of the screen in pixels</param>
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/// <param name="y">The y-offset of the scissor-rect from the top of the screen in pixels</param>
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/// <param name="width">The width of the scissor-rect in pixels</param>
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/// <param name="height">The height of the scissor-rect in pixels</param>
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KINC_FUNC void kinc_g4_scissor(int x, int y, int width, int height);
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/// <summary>
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/// Disables the scissor-rect.
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/// </summary>
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KINC_FUNC void kinc_g4_disable_scissor(void);
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/// <summary>
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/// Draws the entire content of the currently set index-buffer and vertex-buffer. G4 can only draw triangle-lists using vertex-indices as this is what GPUs tend
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/// to be optimized for.
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/// </summary>
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KINC_FUNC void kinc_g4_draw_indexed_vertices(void);
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/// <summary>
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/// Draws a part of the content of the currently set index-buffer and vertex-buffer. G4 can only draw triangle-lists using vertex-indices as this is what GPUs
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/// tend to be optimized for.
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/// </summary>
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/// <param name="start">The offset into the index-buffer</param>
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/// <param name="count">The number of indices to use</param>
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KINC_FUNC void kinc_g4_draw_indexed_vertices_from_to(int start, int count);
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/// <summary>
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/// Draws a part of the content of the currently set index-buffer and vertex-buffer and additionally applies a general offset into the vertex-buffer. G4 can
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/// only draw triangle-lists using vertex-indices as this is what GPUs tend to be optimized for.
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/// </summary>
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/// <param name="start">The offset into the index-buffer</param>
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/// <param name="count">The number of indices to use</param>
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/// <param name="vertex_offset">The offset into the vertex-buffer which is added to each index read from the index-buffer</param>
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KINC_FUNC void kinc_g4_draw_indexed_vertices_from_to_from(int start, int count, int vertex_offset);
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KINC_FUNC void kinc_g4_draw_indexed_vertices_instanced(int instanceCount);
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KINC_FUNC void kinc_g4_draw_indexed_vertices_instanced_from_to(int instanceCount, int start, int count);
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KINC_FUNC void kinc_g4_set_texture_addressing(kinc_g4_texture_unit_t unit, kinc_g4_texture_direction_t dir, kinc_g4_texture_addressing_t addressing);
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KINC_FUNC void kinc_g4_set_texture3d_addressing(kinc_g4_texture_unit_t unit, kinc_g4_texture_direction_t dir, kinc_g4_texture_addressing_t addressing);
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/// <summary>
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/// Sets the pipeline for the next draw-call. The pipeline defines most rendering-state including the shaders to be used.
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/// </summary>
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/// <param name="pipeline">The pipeline to set</param>
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KINC_FUNC void kinc_g4_set_pipeline(struct kinc_g4_pipeline *pipeline);
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KINC_FUNC void kinc_g4_set_stencil_reference_value(int value);
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/// <summary>
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/// Sets the blend constant used for `KINC_G4_BLEND_CONSTANT` or `KINC_G4_INV_BLEND_CONSTANT`
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/// </summary>
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KINC_FUNC void kinc_g4_set_blend_constant(float r, float g, float b, float a);
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#ifdef KINC_KONG
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KINC_FUNC void kinc_g4_set_constant_buffer(uint32_t id, struct kinc_g4_constant_buffer *buffer);
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#endif
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/// <summary>
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/// Assigns an integer to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the value to</param>
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/// <param name="value">The value to assign to the constant/uniform</param>
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KINC_FUNC void kinc_g4_set_int(kinc_g4_constant_location_t location, int value);
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/// <summary>
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/// Assigns two integers to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the values to</param>
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/// <param name="value1">The value to assign to the first component of the constant/uniform</param>
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/// <param name="value2">The value to assign to the second component of the constant/uniform</param>
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KINC_FUNC void kinc_g4_set_int2(kinc_g4_constant_location_t location, int value1, int value2);
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/// <summary>
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/// Assigns three integers to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the values to</param>
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/// <param name="value1">The value to assign to the first component of the constant/uniform</param>
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/// <param name="value2">The value to assign to the second component of the constant/uniform</param>
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/// <param name="value3">The value to assign to the third component of the constant/uniform</param>
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KINC_FUNC void kinc_g4_set_int3(kinc_g4_constant_location_t location, int value1, int value2, int value3);
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/// <summary>
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/// Assigns four integers to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the values to</param>
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/// <param name="value1">The value to assign to the first component of the constant/uniform</param>
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/// <param name="value2">The value to assign to the second component of the constant/uniform</param>
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/// <param name="value3">The value to assign to the third component of the constant/uniform</param>
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/// <param name="value4">The value to assign to the fourth component of the constant/uniform</param>
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KINC_FUNC void kinc_g4_set_int4(kinc_g4_constant_location_t location, int value1, int value2, int value3, int value4);
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/// <summary>
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/// Assigns a bunch of integers to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the values to</param>
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/// <param name="value">The values to assign to the constant/uniform</param>
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/// <param name="value">The number of values to assign to the constant/uniform</param>
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KINC_FUNC void kinc_g4_set_ints(kinc_g4_constant_location_t location, int *values, int count);
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/// <summary>
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/// Assigns a float to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the value to</param>
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/// <param name="value">The value to assign to the constant/uniform</param>
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KINC_FUNC void kinc_g4_set_float(kinc_g4_constant_location_t location, float value);
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/// <summary>
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/// Assigns two floats to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the values to</param>
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/// <param name="value1">The value to assign to the first constant/uniform</param>
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/// <param name="value2">The value to assign to the second constant/uniform</param>
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KINC_FUNC void kinc_g4_set_float2(kinc_g4_constant_location_t location, float value1, float value2);
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/// <summary>
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/// Assigns three floats to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the values to</param>
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/// <param name="value1">The value to assign to the first constant/uniform</param>
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/// <param name="value2">The value to assign to the second constant/uniform</param>
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/// <param name="value3">The value to assign to the third constant/uniform</param>
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KINC_FUNC void kinc_g4_set_float3(kinc_g4_constant_location_t location, float value1, float value2, float value3);
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/// <summary>
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/// Assigns four floats to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the values to</param>
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/// <param name="value1">The value to assign to the first constant/uniform</param>
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/// <param name="value2">The value to assign to the second constant/uniform</param>
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/// <param name="value3">The value to assign to the third constant/uniform</param>
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/// <param name="value4">The value to assign to the fourth constant/uniform</param>
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KINC_FUNC void kinc_g4_set_float4(kinc_g4_constant_location_t location, float value1, float value2, float value3, float value4);
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/// <summary>
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/// Assigns a bunch of floats to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the values to</param>
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/// <param name="value">The values to assign to the constant/uniform</param>
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/// <param name="value">The number of values to assign to the constant/uniform</param>
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KINC_FUNC void kinc_g4_set_floats(kinc_g4_constant_location_t location, float *values, int count);
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/// <summary>
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/// Assigns a bool to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the value to</param>
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/// <param name="value">The value to assign to the constant/uniform</param>
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KINC_FUNC void kinc_g4_set_bool(kinc_g4_constant_location_t location, bool value);
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/// <summary>
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/// Assigns a 3x3-matrix to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the value to</param>
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/// <param name="value">The value to assign to the constant/uniform</param>
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KINC_FUNC void kinc_g4_set_matrix3(kinc_g4_constant_location_t location, kinc_matrix3x3_t *value);
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/// <summary>
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/// Assigns a 4x4-matrix to a constant/uniform in the currently set pipeline.
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/// </summary>
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/// <param name="location">The location of the constant/uniform to assign the value to</param>
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/// <param name="value">The value to assign to the constant/uniform</param>
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KINC_FUNC void kinc_g4_set_matrix4(kinc_g4_constant_location_t location, kinc_matrix4x4_t *value);
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/// <summary>
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/// Set the texture-sampling-mode for upscaled textures.
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/// </summary>
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/// <param name="unit">The texture-unit to set the texture-sampling-mode for</param>
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/// <param name="filter">The mode to set</param>
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KINC_FUNC void kinc_g4_set_texture_magnification_filter(kinc_g4_texture_unit_t unit, kinc_g4_texture_filter_t filter);
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/// <summary>
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/// Set the texture-sampling-mode for upscaled 3D-textures.
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/// </summary>
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/// <param name="unit">The texture-unit to set the texture-sampling-mode for</param>
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/// <param name="filter">The mode to set</param>
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KINC_FUNC void kinc_g4_set_texture3d_magnification_filter(kinc_g4_texture_unit_t texunit, kinc_g4_texture_filter_t filter);
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/// <summary>
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/// Set the texture-sampling-mode for downscaled textures.
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/// </summary>
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/// <param name="unit">The texture-unit to set the texture-sampling-mode for</param>
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/// <param name="filter">The mode to set</param>
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KINC_FUNC void kinc_g4_set_texture_minification_filter(kinc_g4_texture_unit_t unit, kinc_g4_texture_filter_t filter);
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/// <summary>
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/// Set the texture-sampling-mode for downscaled 3D-textures.
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/// </summary>
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/// <param name="unit">The texture-unit to set the texture-sampling-mode for</param>
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/// <param name="filter">The mode to set</param>
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KINC_FUNC void kinc_g4_set_texture3d_minification_filter(kinc_g4_texture_unit_t texunit, kinc_g4_texture_filter_t filter);
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/// <summary>
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/// Sets the mipmap-sampling-mode which defines whether mipmaps are used at all and if so whether the two neighbouring mipmaps are linearly interpolated.
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/// </summary>
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/// <param name="unit">The texture-unit to set the mipmap-sampling-mode for</param>
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/// <param name="filter">The mode to set</param>
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KINC_FUNC void kinc_g4_set_texture_mipmap_filter(kinc_g4_texture_unit_t unit, kinc_g4_mipmap_filter_t filter);
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/// <summary>
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/// Sets the mipmap-sampling-mode for a 3D-texture which defines whether mipmaps are used at all and if so whether the two neighbouring mipmaps are linearly
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/// interpolated.
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/// </summary>
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/// <param name="unit">The texture-unit to set the mipmap-sampling-mode for</param>
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/// <param name="filter">The mode to set</param>
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KINC_FUNC void kinc_g4_set_texture3d_mipmap_filter(kinc_g4_texture_unit_t texunit, kinc_g4_mipmap_filter_t filter);
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KINC_FUNC void kinc_g4_set_texture_compare_mode(kinc_g4_texture_unit_t unit, bool enabled);
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KINC_FUNC void kinc_g4_set_texture_compare_func(kinc_g4_texture_unit_t unit, kinc_g4_compare_mode_t mode);
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KINC_FUNC void kinc_g4_set_cubemap_compare_mode(kinc_g4_texture_unit_t unit, bool enabled);
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KINC_FUNC void kinc_g4_set_cubemap_compare_func(kinc_g4_texture_unit_t unit, kinc_g4_compare_mode_t mode);
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KINC_FUNC void kinc_g4_set_texture_max_anisotropy(kinc_g4_texture_unit_t unit, uint16_t max_anisotropy);
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KINC_FUNC void kinc_g4_set_cubemap_max_anisotropy(kinc_g4_texture_unit_t unit, uint16_t max_anisotropy);
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KINC_FUNC void kinc_g4_set_texture_lod(kinc_g4_texture_unit_t unit, float lod_min_clamp, float lod_max_clamp);
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KINC_FUNC void kinc_g4_set_cubemap_lod(kinc_g4_texture_unit_t unit, float lod_min_clamp, float lod_max_clamp);
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/// <summary>
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/// Sets the framebuffer (aka the actual contents of the current window) to be the target of any future draw-calls.
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/// </summary>
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KINC_FUNC void kinc_g4_restore_render_target(void);
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/// <summary>
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/// Sets the passed render-targets to be the target of any future draw-calls.
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/// </summary>
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/// <param name="targets">An array of render-targets</param>
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/// <param name="count">The number of render-targets in the render-target-array</param>
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KINC_FUNC void kinc_g4_set_render_targets(struct kinc_g4_render_target **targets, int count);
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KINC_FUNC void kinc_g4_set_render_target_face(struct kinc_g4_render_target *texture, int face);
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#ifdef KINC_KONG
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/// <summary>
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/// Assigns a texture to a texture-unit for sampled access via GLSL's texture.
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/// </summary>
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/// <param name="unit">The unit to assign this texture to</param>
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/// <param name="texture">The texture to assign to the unit</param>
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KINC_FUNC void kinc_g4_set_texture(uint32_t unit, struct kinc_g4_texture *texture);
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#else
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/// <summary>
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/// Assigns a texture to a texture-unit for sampled access via GLSL's texture.
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/// </summary>
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/// <param name="unit">The unit to assign this texture to</param>
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/// <param name="texture">The texture to assign to the unit</param>
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KINC_FUNC void kinc_g4_set_texture(kinc_g4_texture_unit_t unit, struct kinc_g4_texture *texture);
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#endif
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/// <summary>
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/// Assigns a texture to a texture-unit for direct access via GLSL's texelFetch (as
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/// opposed to GLSL's texture). The name of this functions is unfortunately based
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/// on OpenGL's confusing terminology.
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/// </summary>
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/// <param name="unit">The unit to assign this texture to</param>
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/// <param name="texture">The texture to assign to the unit</param>
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KINC_FUNC void kinc_g4_set_image_texture(kinc_g4_texture_unit_t unit, struct kinc_g4_texture *texture);
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KINC_FUNC bool kinc_g4_init_occlusion_query(unsigned *occlusionQuery);
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KINC_FUNC void kinc_g4_delete_occlusion_query(unsigned occlusionQuery);
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KINC_FUNC void kinc_g4_start_occlusion_query(unsigned occlusionQuery);
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KINC_FUNC void kinc_g4_end_occlusion_query(unsigned occlusionQuery);
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KINC_FUNC bool kinc_g4_are_query_results_available(unsigned occlusionQuery);
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KINC_FUNC void kinc_g4_get_query_results(unsigned occlusionQuery, unsigned *pixelCount);
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/// <summary>
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/// Assigns a texture-array to a texture-unit.
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/// </summary>
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/// <param name="unit">The unit to assign the texture-array to</param>
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/// <param name="array">The texture-array to assign to the texture-unit</param>
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KINC_FUNC void kinc_g4_set_texture_array(kinc_g4_texture_unit_t unit, struct kinc_g4_texture_array *array);
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/// <summary>
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/// Returns the currently used number of samples for hardware-antialiasing.
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/// </summary>
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/// <returns>The number of samples</returns>
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KINC_FUNC int kinc_g4_antialiasing_samples(void);
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/// <summary>
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/// Sets the number of samples used for hardware-antialiasing. This typically uses multisampling and typically only works with a few specific numbers of
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/// sample-counts - 2 and 4 are pretty safe bets. It also might do nothing at all.
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/// </summary>
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/// <param name="samples">The number of samples</param>
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KINC_FUNC void kinc_g4_set_antialiasing_samples(int samples);
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#ifndef KINC_DOCS
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void kinc_g4_internal_init(void);
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void kinc_g4_internal_init_window(int window, int depth_buffer_bits, int stencil_buffer_bits, bool vsync);
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void kinc_g4_internal_destroy_window(int window);
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void kinc_g4_internal_destroy(void);
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#endif
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#ifdef __cplusplus
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}
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#endif
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