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