[renderer] Add function to destroy frame buffers

Needed for window resizing for fisheye and warp buffers (main buffers
will be taken care of by the drivers).

include/QF/GL/qf_funcs_list.h

@@ -422,7 +422,7 @@ QFGL_WANT (void, glPNTrianglesiATI, (GLint x, GLint y))
 // frame buffers
 QFGL_DONT_NEED (GLboolean, glIsFramebuffer, (GLuint framebuffer))
 QFGL_NEED (void, glBindFramebuffer, (GLenum target, GLuint framebuffer))
-QFGL_DONT_NEED (void, glDeleteFramebuffers, (GLsizei n, const GLuint *framebuffers))
+QFGL_NEED (void, glDeleteFramebuffers, (GLsizei n, const GLuint *framebuffers))
 QFGL_NEED (void, glGenFramebuffers, (GLsizei n, GLuint *framebuffers))
 QFGL_DONT_NEED (GLenum, glCheckFramebufferStatus, (GLenum target))
 QFGL_DONT_NEED (void, glFramebufferTexture1D, (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level))

include/QF/plugin/vid_render.h

@@ -129,6 +129,7 @@ typedef struct vid_render_funcs_s {
 
 	struct framebuffer_s *(*create_cube_map) (int side);
 	struct framebuffer_s *(*create_frame_buffer) (int width, int height);
+	void (*destroy_frame_buffer) (struct framebuffer_s *framebuffer);
 	void (*bind_framebuffer) (struct framebuffer_s *framebuffer);
 	void (*set_viewport) (const struct vrect_s *view);
 	// x and y are tan(f/2) for fov_x and fov_y

libs/video/renderer/vid_render_gl.c

@@ -406,6 +406,18 @@ gl_create_frame_buffer (int width, int height)
 	return fb;
 }
 
+static void
+gl_destroy_frame_buffer (framebuffer_t *framebuffer)
+{
+	__auto_type fb = (gl_framebuffer_t *) framebuffer->buffer;
+
+	qfglDeleteFramebuffers (1, &fb->handle);
+
+	GLuint      tex[2] = { fb->color, fb->depth };
+	qfglDeleteTextures (2, tex);
+	free (framebuffer);
+}
+
 static void
 gl_bind_framebuffer (framebuffer_t *framebuffer)
 {
@@ -528,6 +540,7 @@ vid_render_funcs_t gl_vid_render_funcs = {
 
 	gl_create_cube_map,
 	gl_create_frame_buffer,
+	gl_destroy_frame_buffer,
 	gl_bind_framebuffer,
 	gl_set_viewport,
 	gl_set_fov,

libs/video/renderer/vid_render_glsl.c

@@ -353,6 +353,18 @@ glsl_create_frame_buffer (int width, int height)
 	return fb;
 }
 
+static void
+glsl_destroy_frame_buffer (framebuffer_t *framebuffer)
+{
+	__auto_type fb = (gl_framebuffer_t *) framebuffer->buffer;
+
+	qfeglDeleteFramebuffers (1, &fb->handle);
+
+	GLuint      tex[2] = { fb->color, fb->depth };
+	qfeglDeleteTextures (2, tex);
+	free (framebuffer);
+}
+
 static void
 glsl_bind_framebuffer (framebuffer_t *framebuffer)
 {
@@ -472,6 +484,7 @@ vid_render_funcs_t glsl_vid_render_funcs = {
 
 	glsl_create_cube_map,
 	glsl_create_frame_buffer,
+	glsl_destroy_frame_buffer,
 	glsl_bind_framebuffer,
 	glsl_set_viewport,
 	glsl_set_fov,

libs/video/renderer/vid_render_sw.c

@@ -262,6 +262,12 @@ sw_create_frame_buffer (int width, int height)
 	return fb;
 }
 
+static void
+sw_destroy_frame_buffer (framebuffer_t *framebuffer)
+{
+	free (framebuffer);
+}
+
 static void sw_set_viewport (const vrect_t *view);
 
 static void
@@ -492,6 +498,7 @@ vid_render_funcs_t sw_vid_render_funcs = {
 
 	sw_create_cube_map,
 	sw_create_frame_buffer,
+	sw_destroy_frame_buffer,
 	sw_bind_framebuffer,
 	sw_set_viewport,
 	sw_set_fov,

libs/video/renderer/vid_render_vulkan.c

@@ -476,6 +476,11 @@ vulkan_create_frame_buffer (int width, int height)
 	return 0;
 }
 
+static void
+vulkan_destroy_frame_buffer (framebuffer_t *framebuffer)
+{
+}
+
 static void
 vulkan_bind_framebuffer (framebuffer_t *framebuffer)
 {
@@ -788,6 +793,7 @@ vid_render_funcs_t vulkan_vid_render_funcs = {
 
 	vulkan_create_cube_map,
 	vulkan_create_frame_buffer,
+	vulkan_destroy_frame_buffer,
 	vulkan_bind_framebuffer,
 	vulkan_set_viewport,
 	vulkan_set_fov,