/******************************************************************************
Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#pragma once
#include <util/darray.h>
#include <util/threading.h>
#include <graphics/graphics.h>
#include <graphics/device-exports.h>
#include <graphics/matrix4.h>
#include <glad/glad.h>
#include "gl-helpers.h"
struct gl_platform;
struct gl_windowinfo;
enum copy_type {
COPY_TYPE_ARB,
COPY_TYPE_NV,
COPY_TYPE_FBO_BLIT
};
static inline GLint convert_gs_format(enum gs_color_format format)
{
switch (format) {
case GS_A8: return GL_RED;
case GS_R8: return GL_RED;
case GS_RGBA: return GL_RGBA;
case GS_BGRX: return GL_BGRA;
case GS_BGRA: return GL_BGRA;
case GS_R10G10B10A2: return GL_RGBA;
case GS_RGBA16: return GL_RGBA;
case GS_R16: return GL_RED;
case GS_RGBA16F: return GL_RGBA;
case GS_RGBA32F: return GL_RGBA;
case GS_RG16F: return GL_RG;
case GS_RG32F: return GL_RG;
case GS_R16F: return GL_RED;
case GS_R32F: return GL_RED;
case GS_DXT1: return GL_RGB;
case GS_DXT3: return GL_RGBA;
case GS_DXT5: return GL_RGBA;
case GS_UNKNOWN: return 0;
}
return 0;
}
static inline GLint convert_gs_internal_format(enum gs_color_format format)
{
switch (format) {
case GS_A8: return GL_R8; /* NOTE: use GL_TEXTURE_SWIZZLE_x */
case GS_R8: return GL_R8;
case GS_RGBA: return GL_RGBA;
case GS_BGRX: return GL_RGB;
case GS_BGRA: return GL_RGBA;
case GS_R10G10B10A2: return GL_RGB10_A2;
case GS_RGBA16: return GL_RGBA16;
case GS_R16: return GL_R16;
case GS_RGBA16F: return GL_RGBA16F;
case GS_RGBA32F: return GL_RGBA32F;
case GS_RG16F: return GL_RG16F;
case GS_RG32F: return GL_RG32F;
case GS_R16F: return GL_R16F;
case GS_R32F: return GL_R32F;
case GS_DXT1: return GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
case GS_DXT3: return GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
case GS_DXT5: return GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
case GS_UNKNOWN: return 0;
}
return 0;
}
static inline GLenum get_gl_format_type(enum gs_color_format format)
{
switch (format) {
case GS_A8: return GL_UNSIGNED_BYTE;
case GS_R8: return GL_UNSIGNED_BYTE;
case GS_RGBA: return GL_UNSIGNED_BYTE;
case GS_BGRX: return GL_UNSIGNED_BYTE;
case GS_BGRA: return GL_UNSIGNED_BYTE;
case GS_R10G10B10A2: return GL_UNSIGNED_INT_10_10_10_2;
case GS_RGBA16: return GL_UNSIGNED_SHORT;
case GS_R16: return GL_UNSIGNED_SHORT;
case GS_RGBA16F: return GL_UNSIGNED_SHORT;
case GS_RGBA32F: return GL_FLOAT;
case GS_RG16F: return GL_UNSIGNED_SHORT;
case GS_RG32F: return GL_FLOAT;
case GS_R16F: return GL_UNSIGNED_SHORT;
case GS_R32F: return GL_FLOAT;
case GS_DXT1: return GL_UNSIGNED_BYTE;
case GS_DXT3: return GL_UNSIGNED_BYTE;
case GS_DXT5: return GL_UNSIGNED_BYTE;
case GS_UNKNOWN: return 0;
}
return GL_UNSIGNED_BYTE;
}
static inline GLenum convert_zstencil_format(enum gs_zstencil_format format)
{
switch (format) {
case GS_Z16: return GL_DEPTH_COMPONENT16;
case GS_Z24_S8: return GL_DEPTH24_STENCIL8;
case GS_Z32F: return GL_DEPTH_COMPONENT32F;
case GS_Z32F_S8X24: return GL_DEPTH32F_STENCIL8;
case GS_ZS_NONE: return 0;
}
return 0;
}
static inline GLenum convert_gs_depth_test(enum gs_depth_test test)
{
switch (test) {
case GS_NEVER: return GL_NEVER;
case GS_LESS: return GL_LESS;
case GS_LEQUAL: return GL_LEQUAL;
case GS_EQUAL: return GL_EQUAL;
case GS_GEQUAL: return GL_GEQUAL;
case GS_GREATER: return GL_GREATER;
case GS_NOTEQUAL: return GL_NOTEQUAL;
case GS_ALWAYS: return GL_ALWAYS;
}
return GL_NEVER;
}
static inline GLenum convert_gs_stencil_op(enum gs_stencil_op_type op)
{
switch (op) {
case GS_KEEP: return GL_KEEP;
case GS_ZERO: return GL_ZERO;
case GS_REPLACE: return GL_REPLACE;
case GS_INCR: return GL_INCR;
case GS_DECR: return GL_DECR;
case GS_INVERT: return GL_INVERT;
}
return GL_KEEP;
}
static inline GLenum convert_gs_stencil_side(enum gs_stencil_side side)
{
switch (side) {
case GS_STENCIL_FRONT: return GL_FRONT;
case GS_STENCIL_BACK: return GL_BACK;
case GS_STENCIL_BOTH: return GL_FRONT_AND_BACK;
}
return GL_FRONT;
}
static inline GLenum convert_gs_blend_type(enum gs_blend_type type)
{
switch (type) {
case GS_BLEND_ZERO: return GL_ZERO;
case GS_BLEND_ONE: return GL_ONE;
case GS_BLEND_SRCCOLOR: return GL_SRC_COLOR;
case GS_BLEND_INVSRCCOLOR: return GL_ONE_MINUS_SRC_COLOR;
case GS_BLEND_SRCALPHA: return GL_SRC_ALPHA;
case GS_BLEND_INVSRCALPHA: return GL_ONE_MINUS_SRC_ALPHA;
case GS_BLEND_DSTCOLOR: return GL_DST_COLOR;
case GS_BLEND_INVDSTCOLOR: return GL_ONE_MINUS_DST_COLOR;
case GS_BLEND_DSTALPHA: return GL_DST_ALPHA;
case GS_BLEND_INVDSTALPHA: return GL_ONE_MINUS_DST_ALPHA;
case GS_BLEND_SRCALPHASAT: return GL_SRC_ALPHA_SATURATE;
}
return GL_ONE;
}
static inline GLenum convert_shader_type(enum gs_shader_type type)
{
switch (type) {
case GS_SHADER_VERTEX: return GL_VERTEX_SHADER;
case GS_SHADER_PIXEL: return GL_FRAGMENT_SHADER;
}
return GL_VERTEX_SHADER;
}
static inline void convert_filter(enum gs_sample_filter filter,
GLint *min_filter, GLint *mag_filter)
{
switch (filter) {
case GS_FILTER_POINT:
*min_filter = GL_NEAREST_MIPMAP_NEAREST;
*mag_filter = GL_NEAREST;
return;
case GS_FILTER_LINEAR:
*min_filter = GL_LINEAR_MIPMAP_LINEAR;
*mag_filter = GL_LINEAR;
return;
case GS_FILTER_MIN_MAG_POINT_MIP_LINEAR:
*min_filter = GL_NEAREST_MIPMAP_LINEAR;
*mag_filter = GL_NEAREST;
return;
case GS_FILTER_MIN_POINT_MAG_LINEAR_MIP_POINT:
*min_filter = GL_NEAREST_MIPMAP_NEAREST;
*mag_filter = GL_LINEAR;
return;
case GS_FILTER_MIN_POINT_MAG_MIP_LINEAR:
*min_filter = GL_NEAREST_MIPMAP_LINEAR;
*mag_filter = GL_LINEAR;
return;
case GS_FILTER_MIN_LINEAR_MAG_MIP_POINT:
*min_filter = GL_LINEAR_MIPMAP_NEAREST;
*mag_filter = GL_NEAREST;
return;
case GS_FILTER_MIN_LINEAR_MAG_POINT_MIP_LINEAR:
*min_filter = GL_LINEAR_MIPMAP_LINEAR;
*mag_filter = GL_NEAREST;
return;
case GS_FILTER_MIN_MAG_LINEAR_MIP_POINT:
*min_filter = GL_LINEAR_MIPMAP_NEAREST;
*mag_filter = GL_LINEAR;
return;
case GS_FILTER_ANISOTROPIC:
*min_filter = GL_LINEAR_MIPMAP_LINEAR;
*mag_filter = GL_LINEAR;
return;
}
*min_filter = GL_NEAREST_MIPMAP_NEAREST;
*mag_filter = GL_NEAREST;
}
static inline GLint convert_address_mode(enum gs_address_mode mode)
{
switch (mode) {
case GS_ADDRESS_WRAP: return GL_REPEAT;
case GS_ADDRESS_CLAMP: return GL_CLAMP_TO_EDGE;
case GS_ADDRESS_MIRROR: return GL_MIRRORED_REPEAT;
case GS_ADDRESS_BORDER: return GL_CLAMP_TO_BORDER;
case GS_ADDRESS_MIRRORONCE: return GL_MIRROR_CLAMP_EXT;
}
return GL_REPEAT;
}
static inline GLenum convert_gs_topology(enum gs_draw_mode mode)
{
switch (mode) {
case GS_POINTS: return GL_POINTS;
case GS_LINES: return GL_LINES;
case GS_LINESTRIP: return GL_LINE_STRIP;
case GS_TRIS: return GL_TRIANGLES;
case GS_TRISTRIP: return GL_TRIANGLE_STRIP;
}
return GL_POINTS;
}
extern void convert_sampler_info(struct gs_sampler_state *sampler,
const struct gs_sampler_info *info);
struct gs_sampler_state {
gs_device_t *device;
volatile long ref;
GLint min_filter;
GLint mag_filter;
GLint address_u;
GLint address_v;
GLint address_w;
GLint max_anisotropy;
};
static inline void samplerstate_addref(gs_samplerstate_t *ss)
{
os_atomic_inc_long(&ss->ref);
}
static inline void samplerstate_release(gs_samplerstate_t *ss)
{
if (os_atomic_dec_long(&ss->ref) == 0)
bfree(ss);
}
struct gs_shader_param {
enum gs_shader_param_type type;
char *name;
gs_shader_t *shader;
gs_samplerstate_t *next_sampler;
GLint texture_id;
size_t sampler_id;
int array_count;
struct gs_texture *texture;
DARRAY(uint8_t) cur_value;
DARRAY(uint8_t) def_value;
bool changed;
};
enum attrib_type {
ATTRIB_POSITION,
ATTRIB_NORMAL,
ATTRIB_TANGENT,
ATTRIB_COLOR,
ATTRIB_TEXCOORD,
ATTRIB_TARGET
};
struct shader_attrib {
char *name;
size_t index;
enum attrib_type type;
};
struct gs_shader {
gs_device_t *device;
enum gs_shader_type type;
GLuint obj;
struct gs_shader_param *viewproj;
struct gs_shader_param *world;
DARRAY(struct shader_attrib) attribs;
DARRAY(struct gs_shader_param) params;
DARRAY(gs_samplerstate_t*) samplers;
};
struct program_param {
GLint obj;
struct gs_shader_param *param;
};
struct gs_program {
gs_device_t *device;
GLuint obj;
struct gs_shader *vertex_shader;
struct gs_shader *pixel_shader;
DARRAY(struct program_param) params;
DARRAY(GLint) attribs;
struct gs_program **prev_next;
struct gs_program *next;
};
extern struct gs_program *gs_program_create(struct gs_device *device);
extern void gs_program_destroy(struct gs_program *program);
extern void program_update_params(struct gs_program *shader);
struct gs_vertex_buffer {
GLuint vao;
GLuint vertex_buffer;
GLuint normal_buffer;
GLuint tangent_buffer;
GLuint color_buffer;
DARRAY(GLuint) uv_buffers;
DARRAY(size_t) uv_sizes;
gs_device_t *device;
size_t num;
bool dynamic;
struct gs_vb_data *data;
};
extern bool load_vb_buffers(struct gs_program *program,
struct gs_vertex_buffer *vb, struct gs_index_buffer *ib);
struct gs_index_buffer {
GLuint buffer;
enum gs_index_type type;
GLuint gl_type;
gs_device_t *device;
void *data;
size_t num;
size_t width;
size_t size;
bool dynamic;
};
struct gs_texture {
gs_device_t *device;
enum gs_texture_type type;
enum gs_color_format format;
GLenum gl_format;
GLenum gl_target;
GLint gl_internal_format;
GLenum gl_type;
GLuint texture;
uint32_t levels;
bool is_dynamic;
bool is_render_target;
bool is_dummy;
bool gen_mipmaps;
gs_samplerstate_t *cur_sampler;
};
struct gs_texture_2d {
struct gs_texture base;
uint32_t width;
uint32_t height;
bool gen_mipmaps;
GLuint unpack_buffer;
};
struct gs_texture_cube {
struct gs_texture base;
uint32_t size;
};
struct gs_stage_surface {
gs_device_t *device;
enum gs_color_format format;
uint32_t width;
uint32_t height;
uint32_t bytes_per_pixel;
GLenum gl_format;
GLint gl_internal_format;
GLenum gl_type;
GLuint pack_buffer;
};
struct gs_zstencil_buffer {
gs_device_t *device;
GLuint buffer;
GLuint attachment;
GLenum format;
};
struct gs_swap_chain {
gs_device_t *device;
struct gl_windowinfo *wi;
struct gs_init_data info;
};
struct fbo_info {
GLuint fbo;
uint32_t width;
uint32_t height;
enum gs_color_format format;
gs_texture_t *cur_render_target;
int cur_render_side;
gs_zstencil_t *cur_zstencil_buffer;
};
static inline void fbo_info_destroy(struct fbo_info *fbo)
{
if (fbo) {
glDeleteFramebuffers(1, &fbo->fbo);
gl_success("glDeleteFramebuffers");
bfree(fbo);
}
}
struct gs_device {
struct gl_platform *plat;
enum copy_type copy_type;
gs_texture_t *cur_render_target;
gs_zstencil_t *cur_zstencil_buffer;
int cur_render_side;
gs_texture_t *cur_textures[GS_MAX_TEXTURES];
gs_samplerstate_t *cur_samplers[GS_MAX_TEXTURES];
gs_vertbuffer_t *cur_vertex_buffer;
gs_indexbuffer_t *cur_index_buffer;
gs_shader_t *cur_vertex_shader;
gs_shader_t *cur_pixel_shader;
gs_swapchain_t *cur_swap;
struct gs_program *cur_program;
struct gs_program *first_program;
enum gs_cull_mode cur_cull_mode;
struct gs_rect cur_viewport;
struct matrix4 cur_proj;
struct matrix4 cur_view;
struct matrix4 cur_viewproj;
DARRAY(struct matrix4) proj_stack;
DARRAY(struct fbo_info*) fbos;
struct fbo_info *cur_fbo;
};
extern struct fbo_info *get_fbo(struct gs_device *device,
uint32_t width, uint32_t height, enum gs_color_format format);
extern void gl_update(gs_device_t *device);
extern struct gl_platform *gl_platform_create(gs_device_t *device,
uint32_t adapter);
extern void gl_platform_destroy(struct gl_platform *platform);
extern bool gl_platform_init_swapchain(struct gs_swap_chain *swap);
extern void gl_platform_cleanup_swapchain(struct gs_swap_chain *swap);
extern struct gl_windowinfo *gl_windowinfo_create(
const struct gs_init_data *info);
extern void gl_windowinfo_destroy(struct gl_windowinfo *wi);
extern void gl_getclientsize(const struct gs_swap_chain *swap,
uint32_t *width,
uint32_t *height);