[renderer] Add fitted pic rendering

The pic is scaled to fill the specified rect (then clipped to the
screen (effectively)). Done just for the console background for now, but
it will be used for slice-pics as well.

Not implemented for vulkan yet as I'm still thinking about the
descriptor management needed for the instanced rendering.

Making the conback rendering conditional gave an approximately 3% speed
boost to glsl with the GL stub (~12200fps to ~12550fps), for either
conback render method.

include/QF/GL/qf_draw.h

@@ -55,6 +55,7 @@ struct qpic_s *gl_Draw_MakePic (int width, int height, const byte *data);
 void gl_Draw_DestroyPic (struct qpic_s *pic);
 struct qpic_s *gl_Draw_PicFromWad (const char *name);
 void gl_Draw_Pic (int x, int y, struct qpic_s *pic);
+void gl_Draw_FitPic (int x, int y, int width, int height, struct qpic_s *pic);
 void gl_Draw_Picf (float x, float y, struct qpic_s *pic);
 void gl_Draw_SubPic(int x, int y, struct qpic_s *pic,
 					  int srcx, int srcy, int width, int height);

include/QF/GLSL/qf_draw.h

@@ -56,6 +56,7 @@ struct qpic_s *glsl_Draw_MakePic (int width, int height, const byte *data);
 void glsl_Draw_DestroyPic (struct qpic_s *pic);
 struct qpic_s *glsl_Draw_PicFromWad (const char *name);
 void glsl_Draw_Pic (int x, int y, struct qpic_s *pic);
+void glsl_Draw_FitPic (int x, int y, int width, int height, struct qpic_s *pic);
 void glsl_Draw_Picf (float x, float y, struct qpic_s *pic);
 void glsl_Draw_SubPic(int x, int y, struct qpic_s *pic,
 					  int srcx, int srcy, int width, int height);

include/QF/Vulkan/qf_draw.h

@@ -76,6 +76,8 @@ struct qpic_s *Vulkan_Draw_PicFromWad (const char *name,
 									   struct vulkan_ctx_s *ctx);
 void Vulkan_Draw_Pic (int x, int y, struct qpic_s *pic,
 					  struct vulkan_ctx_s *ctx);
+void Vulkan_Draw_FitPic (int x, int y, int width, int height,
+						 struct qpic_s *pic, struct vulkan_ctx_s *ctx);
 void Vulkan_Draw_Picf (float x, float y, struct qpic_s *pic,
 					   struct vulkan_ctx_s *ctx);
 void Vulkan_Draw_SubPic(int x, int y, struct qpic_s *pic,

include/QF/draw.h

@@ -245,6 +245,15 @@ qpic_t *Draw_PicFromWad (const char *name);
 */
 void Draw_Pic (int x, int y, qpic_t *pic);
 
+/** Draw a qpic to the screen, scaled to fit the given width and height
+	\param x	horizontal location of the upper left corner of the qpic
+	\param y	vertical location of the upper left corner of the qpic
+	\param width horizontal size of the output pic
+	\param height vertical size of the output pic
+	\param pic	qpic to draw
+*/
+void Draw_FitPic (int x, int y, int width, int height, qpic_t *pic);
+
 /** Draw a qpic to the screen
 	\param x	horizontal location of the upper left corner of the qpic
 	\param y	vertical location of the upper left corner of the qpic

include/QF/plugin/vid_render.h

@@ -108,6 +108,7 @@ typedef struct vid_render_funcs_s {
 	void (*Draw_DestroyPic) (qpic_t *pic);
 	qpic_t *(*Draw_PicFromWad) (const char *name);
 	void (*Draw_Pic) (int x, int y, qpic_t *pic);
+	void (*Draw_FitPic) (int x, int y, int width, int height, qpic_t *pic);
 	void (*Draw_Picf) (float x, float y, qpic_t *pic);
 	void (*Draw_SubPic) (int x, int y, qpic_t *pic, int srcx, int srcy, int width, int height);
 	int (*Draw_AddFont) (struct font_s *font);

include/QF/ui/canvas.h

@@ -38,6 +38,7 @@ enum {
 	canvas_updateonce,
 	canvas_tile,
 	canvas_pic,
+	canvas_fitpic,	// pic is scaled to fit the view
 	canvas_subpic,
 	canvas_cachepic,
 	canvas_fill,

libs/console/client.c

@@ -667,17 +667,21 @@ static void
 draw_console (view_t view)
 {
 	byte        alpha;
+	view_pos_t  len = View_GetLen (screen_view);
 
+	if (con_data.lines > 0) {
+		// draw the background
 		if (con_state == con_fullscreen) {
 			alpha = 255;
 		} else {
-		view_pos_t  len = View_GetLen (screen_view);
 			float       y = len.y * con_size;
 			alpha = 255 * con_alpha * len.y / y;
 			alpha = min (alpha, 255);
 		}
-	// draw the background
+		//r_funcs->Draw_ConsoleBackground (con_data.lines, alpha);
-	r_funcs->Draw_ConsoleBackground (con_data.lines, alpha);
+		qpic_t *pic = r_funcs->Draw_CachePic ("gfx/conback.lmp", false);
+		r_funcs->Draw_FitPic (0, con_data.lines - len.y, len.x, len.y, pic);
+	}
 
 	update_notify ();
 	// draw everything else

libs/ui/canvas.c

@@ -49,6 +49,7 @@ canvas_rangeid(update)
 canvas_rangeid(updateonce)
 canvas_rangeid(tile)
 canvas_rangeid(pic)
+canvas_rangeid(fitpic)
 canvas_rangeid(subpic)
 canvas_rangeid(cachepic)
 canvas_rangeid(fill)
@@ -75,7 +76,7 @@ const component_t canvas_components[canvas_comp_count] = {
 	},
 	[canvas_tile] = {
 		.size = sizeof (byte),
-		.name = "pic",
+		.name = "tile",
 		.rangeid = canvas_tile_rangeid,
 	},
 	[canvas_pic] = {
@@ -83,6 +84,11 @@ const component_t canvas_components[canvas_comp_count] = {
 		.name = "pic",
 		.rangeid = canvas_pic_rangeid,
 	},
+	[canvas_fitpic] = {
+		.size = sizeof (qpic_t *),
+		.name = "fitpic",
+		.rangeid = canvas_fitpic_rangeid,
+	},
 	[canvas_subpic] = {
 		.size = sizeof (canvas_subpic_t),
 		.name = "subpic",
@@ -177,6 +183,25 @@ draw_pic_views (canvas_system_t *canvas_sys, ecs_pool_t *pool,
 	}
 }
 
+static void
+draw_fitpic_views (canvas_system_t *canvas_sys, ecs_pool_t *pool,
+				   ecs_range_t range)
+{
+	ecs_system_t viewsys = { canvas_sys->reg, canvas_sys->view_base };
+	uint32_t    count = range.end - range.start;
+	uint32_t   *ent = pool->dense;
+	__auto_type pic = (qpic_t **) pool->data + range.start;
+	while (count-- > 0) {
+		view_t      view = View_FromEntity (viewsys, *ent++);
+		if (View_GetVisible (view)) {
+			view_pos_t  pos = View_GetAbs (view);
+			view_pos_t  len = View_GetLen (view);
+			r_funcs->Draw_FitPic (pos.x, pos.y, len.x, len.y, *pic);
+		}
+		pic++;
+	}
+}
+
 static void
 draw_subpic_views (canvas_system_t *canvas_sys, ecs_pool_t *pool,
 				   ecs_range_t range)
@@ -303,6 +328,7 @@ Canvas_Draw (canvas_system_t canvas_sys)
 		[canvas_updateonce] = draw_updateonce,
 		[canvas_tile]       = draw_tile_views,
 		[canvas_pic]        = draw_pic_views,
+		[canvas_fitpic]     = draw_fitpic_views,
 		[canvas_subpic]     = draw_subpic_views,
 		[canvas_cachepic]   = draw_cachepic_views,
 		[canvas_fill]       = draw_fill_views,

libs/video/renderer/gl/gl_draw.c

@@ -761,6 +761,26 @@ gl_Draw_Pic (int x, int y, qpic_t *pic)
 	qfglEnd ();
 }
 
+void
+gl_Draw_FitPic (int x, int y, int width, int height, qpic_t *pic)
+{
+	glpic_t    *gl;
+
+	gl = (glpic_t *) pic->data;
+
+	qfglBindTexture (GL_TEXTURE_2D, gl->texnum);
+	qfglBegin (GL_QUADS);
+	qfglTexCoord2f (0, 0);
+	qfglVertex2f (x, y);
+	qfglTexCoord2f (1, 0);
+	qfglVertex2f (x + width, y);
+	qfglTexCoord2f (1, 1);
+	qfglVertex2f (x + width, y + height);
+	qfglTexCoord2f (0, 1);
+	qfglVertex2f (x, y + height);
+	qfglEnd ();
+}
+
 void
 gl_Draw_Picf (float x, float y, qpic_t *pic)
 {

libs/video/renderer/glsl/glsl_draw.c

@@ -661,6 +661,13 @@ glsl_Draw_Pic (int x, int y, qpic_t *pic)
 			  0, 0, pic->width, pic->height, color);
 }
 
+void
+glsl_Draw_FitPic (int x, int y, int width, int height, qpic_t *pic)
+{
+	static quat_t color = { 1, 1, 1, 1};
+	draw_pic (x, y, width, height, pic, 0, 0, pic->width, pic->height, color);
+}
+
 void
 glsl_Draw_Picf (float x, float y, qpic_t *pic)
 {

libs/video/renderer/sw/draw.c

@@ -536,6 +536,58 @@ Draw_Pic (int x, int y, qpic_t *pic)
 	}
 }
 
+void
+Draw_FitPic (int x, int y, int width, int height, qpic_t *pic)
+{
+	int         v_width = vid.width;
+	int         v_height = vid.height;
+	if (x > v_width || y > v_width || x + width <= 0 || y + height <= 0) {
+		return;
+	}
+	if (width == pic->width && height == pic->height) {
+		Draw_Pic (x, y, pic);
+		return;
+	}
+	int         sstep = pic->width * 0x10000 / width;
+	int         tstep = pic->height * 0x10000 / height;
+	int         sx = 0, ex = width;
+	int         sy = 0, ey = height;
+
+	if (x < 0) {
+		sx -= x;
+		ex += x;
+	}
+	if (y < 0) {
+		sy -= y;
+		ey += y;
+	}
+	if (x + width > v_width) {
+		ex -= x + width - v_width;
+	}
+	if (y + height > v_height) {
+		ey -= y + height - v_height;
+	}
+	x += sx;
+	y += sy;
+
+	byte       *src, *dst;
+
+	// draw the pic
+	dst = d_viewbuffer + y * d_rowbytes + x;
+
+	for (int y = sy; y < sy + ey; y++, dst += d_rowbytes) {
+		src = pic->data + ((y * tstep) >> 16) * pic->width;
+		if (width == pic->width)
+			memcpy (dst, src, width);
+		else {
+			int         f = sx * sstep;
+			for (int x = 0; x < ex; x++, f += sstep) {
+				dst[x] = src[f >> 16];
+			}
+		}
+	}
+}
+
 void
 Draw_Picf (float x, float y, qpic_t *pic)
 {

libs/video/renderer/vid_render_gl.c

@@ -522,6 +522,7 @@ vid_render_funcs_t gl_vid_render_funcs = {
 	.Draw_DestroyPic        = gl_Draw_DestroyPic,
 	.Draw_PicFromWad        = gl_Draw_PicFromWad,
 	.Draw_Pic               = gl_Draw_Pic,
+	.Draw_FitPic            = gl_Draw_FitPic,
 	.Draw_Picf              = gl_Draw_Picf,
 	.Draw_SubPic            = gl_Draw_SubPic,
 	.Draw_AddFont           = gl_Draw_AddFont,

libs/video/renderer/vid_render_glsl.c

@@ -466,6 +466,7 @@ vid_render_funcs_t glsl_vid_render_funcs = {
 	.Draw_DestroyPic        = glsl_Draw_DestroyPic,
 	.Draw_PicFromWad        = glsl_Draw_PicFromWad,
 	.Draw_Pic               = glsl_Draw_Pic,
+	.Draw_FitPic            = glsl_Draw_FitPic,
 	.Draw_Picf              = glsl_Draw_Picf,
 	.Draw_SubPic            = glsl_Draw_SubPic,
 	.Draw_AddFont           = glsl_Draw_AddFont,

libs/video/renderer/vid_render_sw.c

@@ -479,6 +479,7 @@ vid_render_funcs_t sw_vid_render_funcs = {
 	.Draw_DestroyPic        = Draw_DestroyPic,
 	.Draw_PicFromWad        = Draw_PicFromWad,
 	.Draw_Pic               = Draw_Pic,
+	.Draw_FitPic            = Draw_FitPic,
 	.Draw_Picf              = Draw_Picf,
 	.Draw_SubPic            = Draw_SubPic,
 	.Draw_AddFont           = Draw_AddFont,

libs/video/renderer/vid_render_vulkan.c

@@ -272,6 +272,12 @@ vulkan_Draw_Pic (int x, int y, qpic_t *pic)
 	Vulkan_Draw_Pic (x, y, pic, vulkan_ctx);
 }
 
+static void
+vulkan_Draw_FitPic (int x, int y, int width, int height, qpic_t *pic)
+{
+	Vulkan_Draw_FitPic (x, y, width, height, pic, vulkan_ctx);
+}
+
 static void
 vulkan_Draw_Picf (float x, float y, qpic_t *pic)
 {
@@ -789,6 +795,7 @@ vid_render_funcs_t vulkan_vid_render_funcs = {
 	.Draw_DestroyPic        = vulkan_Draw_DestroyPic,
 	.Draw_PicFromWad        = vulkan_Draw_PicFromWad,
 	.Draw_Pic               = vulkan_Draw_Pic,
+	.Draw_FitPic            = vulkan_Draw_FitPic,
 	.Draw_Picf              = vulkan_Draw_Picf,
 	.Draw_SubPic            = vulkan_Draw_SubPic,
 	.Draw_AddFont           = vulkan_Draw_AddFont,

libs/video/renderer/vulkan/vulkan_draw.c

@@ -1185,6 +1185,12 @@ Vulkan_Draw_Pic (int x, int y, qpic_t *pic, vulkan_ctx_t *ctx)
 	draw_quad (x, y, pd->descid, pd->vert_index, color, frame);
 }
 
+void
+Vulkan_Draw_FitPic (int x, int y, int widht, int height, qpic_t *pic,
+					vulkan_ctx_t *ctx)
+{
+}
+
 void
 Vulkan_Draw_Picf (float x, float y, qpic_t *pic, vulkan_ctx_t *ctx)
 {