mirror of
https://github.com/SerenityOS/serenity
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b79642ef74
In its current state, ScummVM seems to invoke these methods just after
destroying the current GL context. According to the OpenGL spec:
"Issuing GL commands when the program does not have a current
context results in undefined behavior, up to and including program
termination."
Our old behavior was to deref a `nullptr`, which isn't that great. For
now, protect these two methods. If other ports seem to misbehave as
well, we can always expand the check to other methods.
127 lines
6.8 KiB
C++
127 lines
6.8 KiB
C++
/*
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* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
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* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include "GL/gl.h"
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#include <AK/OwnPtr.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/Matrix4x4.h>
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namespace GL {
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#define VERIFY_CURRENT_CONTEXT() \
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if (!g_gl_context) { \
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return; \
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}
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#define VERIFY_CURRENT_CONTEXT_OR_VALUE(value) \
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if (!g_gl_context) { \
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return value; \
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}
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class GLContext {
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public:
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virtual ~GLContext();
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virtual void gl_begin(GLenum mode) = 0;
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virtual void gl_clear(GLbitfield mask) = 0;
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virtual void gl_clear_color(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha) = 0;
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virtual void gl_clear_depth(GLdouble depth) = 0;
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virtual void gl_clear_stencil(GLint s) = 0;
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virtual void gl_color(GLdouble r, GLdouble g, GLdouble b, GLdouble a) = 0;
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virtual void gl_delete_textures(GLsizei n, const GLuint* textures) = 0;
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virtual void gl_end() = 0;
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virtual void gl_frustum(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near_val, GLdouble far_val) = 0;
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virtual void gl_gen_textures(GLsizei n, GLuint* textures) = 0;
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virtual GLenum gl_get_error() = 0;
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virtual GLubyte* gl_get_string(GLenum name) = 0;
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virtual void gl_load_identity() = 0;
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virtual void gl_load_matrix(const FloatMatrix4x4& matrix) = 0;
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virtual void gl_matrix_mode(GLenum mode) = 0;
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virtual void gl_ortho(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top, GLdouble near_val, GLdouble far_val) = 0;
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virtual void gl_push_matrix() = 0;
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virtual void gl_pop_matrix() = 0;
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virtual void gl_mult_matrix(FloatMatrix4x4 const& matrix) = 0;
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virtual void gl_rotate(GLdouble angle, GLdouble x, GLdouble y, GLdouble z) = 0;
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virtual void gl_scale(GLdouble x, GLdouble y, GLdouble z) = 0;
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virtual void gl_translate(GLdouble x, GLdouble y, GLdouble z) = 0;
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virtual void gl_vertex(GLdouble x, GLdouble y, GLdouble z, GLdouble w) = 0;
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virtual void gl_viewport(GLint x, GLint y, GLsizei width, GLsizei height) = 0;
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virtual void gl_enable(GLenum) = 0;
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virtual void gl_disable(GLenum) = 0;
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virtual GLboolean gl_is_enabled(GLenum) = 0;
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virtual void gl_front_face(GLenum) = 0;
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virtual void gl_cull_face(GLenum) = 0;
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virtual GLuint gl_gen_lists(GLsizei range) = 0;
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virtual void gl_call_list(GLuint list) = 0;
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virtual void gl_call_lists(GLsizei n, GLenum type, void const* lists) = 0;
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virtual void gl_delete_lists(GLuint list, GLsizei range) = 0;
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virtual void gl_list_base(GLuint base) = 0;
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virtual void gl_end_list(void) = 0;
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virtual void gl_new_list(GLuint list, GLenum mode) = 0;
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virtual GLboolean gl_is_list(GLuint list) = 0;
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virtual void gl_flush() = 0;
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virtual void gl_finish() = 0;
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virtual void gl_blend_func(GLenum src_factor, GLenum dst_factor) = 0;
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virtual void gl_shade_model(GLenum mode) = 0;
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virtual void gl_alpha_func(GLenum func, GLclampf ref) = 0;
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virtual void gl_hint(GLenum target, GLenum mode) = 0;
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virtual void gl_read_buffer(GLenum mode) = 0;
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virtual void gl_draw_buffer(GLenum buffer) = 0;
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virtual void gl_read_pixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid* pixels) = 0;
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virtual void gl_tex_image_2d(GLenum target, GLint level, GLint internal_format, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid* data) = 0;
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virtual void gl_tex_sub_image_2d(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid* data) = 0;
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virtual void gl_tex_parameter(GLenum target, GLenum pname, GLfloat param) = 0;
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virtual void gl_tex_coord(GLfloat s, GLfloat t, GLfloat r, GLfloat q) = 0;
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virtual void gl_tex_env(GLenum target, GLenum pname, GLfloat param) = 0;
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virtual void gl_bind_texture(GLenum target, GLuint texture) = 0;
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virtual void gl_active_texture(GLenum texture) = 0;
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virtual void gl_depth_mask(GLboolean flag) = 0;
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virtual void gl_enable_client_state(GLenum cap) = 0;
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virtual void gl_disable_client_state(GLenum cap) = 0;
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virtual void gl_vertex_pointer(GLint size, GLenum type, GLsizei stride, const void* pointer) = 0;
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virtual void gl_color_pointer(GLint size, GLenum type, GLsizei stride, const void* pointer) = 0;
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virtual void gl_tex_coord_pointer(GLint size, GLenum type, GLsizei stride, const void* pointer) = 0;
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virtual void gl_draw_arrays(GLenum mode, GLint first, GLsizei count) = 0;
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virtual void gl_draw_elements(GLenum mode, GLsizei count, GLenum type, const void* indices) = 0;
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virtual void gl_draw_pixels(GLsizei width, GLsizei height, GLenum format, GLenum type, const void* data) = 0;
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virtual void gl_color_mask(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha) = 0;
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virtual void gl_get_booleanv(GLenum pname, GLboolean* data) = 0;
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virtual void gl_get_doublev(GLenum pname, GLdouble* params) = 0;
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virtual void gl_get_floatv(GLenum pname, GLfloat* params) = 0;
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virtual void gl_get_integerv(GLenum pname, GLint* data) = 0;
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virtual void gl_depth_range(GLdouble min, GLdouble max) = 0;
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virtual void gl_depth_func(GLenum func) = 0;
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virtual void gl_polygon_mode(GLenum face, GLenum mode) = 0;
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virtual void gl_polygon_offset(GLfloat factor, GLfloat units) = 0;
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virtual void gl_fogfv(GLenum pname, GLfloat* params) = 0;
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virtual void gl_fogf(GLenum pname, GLfloat params) = 0;
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virtual void gl_fogi(GLenum pname, GLint param) = 0;
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virtual void gl_pixel_storei(GLenum pname, GLint param) = 0;
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virtual void gl_scissor(GLint x, GLint y, GLsizei width, GLsizei height) = 0;
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virtual void gl_stencil_func_separate(GLenum face, GLenum func, GLint ref, GLuint mask) = 0;
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virtual void gl_stencil_op_separate(GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass) = 0;
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virtual void gl_normal(GLfloat nx, GLfloat ny, GLfloat nz) = 0;
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virtual void gl_raster_pos(GLfloat x, GLfloat y, GLfloat z, GLfloat w) = 0;
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virtual void gl_materialv(GLenum face, GLenum pname, GLfloat const* params) = 0;
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virtual void gl_line_width(GLfloat width) = 0;
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virtual void gl_push_attrib(GLbitfield mask) = 0;
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virtual void gl_pop_attrib() = 0;
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virtual void gl_light_model(GLenum pname, GLfloat x, GLfloat y, GLfloat z, GLfloat w) = 0;
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virtual void gl_bitmap(GLsizei width, GLsizei height, GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove, GLubyte const* bitmap) = 0;
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virtual void gl_copy_tex_image_2d(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border) = 0;
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virtual void present() = 0;
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};
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OwnPtr<GLContext> create_context(Gfx::Bitmap&);
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void make_context_current(GLContext*);
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void present_context(GLContext*);
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}
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